CA2633942C - Induction heater device - Google Patents
Induction heater device Download PDFInfo
- Publication number
- CA2633942C CA2633942C CA2633942A CA2633942A CA2633942C CA 2633942 C CA2633942 C CA 2633942C CA 2633942 A CA2633942 A CA 2633942A CA 2633942 A CA2633942 A CA 2633942A CA 2633942 C CA2633942 C CA 2633942C
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- Prior art keywords
- leveler
- entrance
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- height
- leveler portion
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B6/00—Heating by electric, magnetic or electromagnetic fields
- H05B6/02—Induction heating
- H05B6/10—Induction heating apparatus, other than furnaces, for specific applications
- H05B6/101—Induction heating apparatus, other than furnaces, for specific applications for local heating of metal pieces
- H05B6/103—Induction heating apparatus, other than furnaces, for specific applications for local heating of metal pieces multiple metal pieces successively being moved close to the inductor
- H05B6/104—Induction heating apparatus, other than furnaces, for specific applications for local heating of metal pieces multiple metal pieces successively being moved close to the inductor metal pieces being elongated like wires or bands
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/74—Temperature control, e.g. by cooling or heating the rolls or the product
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B45/004—Heating the product
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D1/00—Straightening, restoring form or removing local distortions of sheet metal or specific articles made therefrom; Stretching sheet metal combined with rolling
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- General Induction Heating (AREA)
- Straightening Metal Sheet-Like Bodies (AREA)
Abstract
An induction heater device (1) is constituted of a heater portion (2), a plurality of feeder rollers (R) and a leveler portion (3) , and is disposed downstream in regard to a direction of conveyance of the rolled material (P) un-coiled from a coil box (B). The heater portion (2) has an inductor and heats a subject-to-heating material (P) by means of high-frequency induction. The feeder roller (R) conveys the rolled material (P) to the heater portion (2) . The leveler portion (3) is provided in the vicinity of the heater portion (2) and limits a height of a warp of the subject-to-heatingmaterial (P) , thereby improves heating ability of the heater portion (2) substantially and prevents the rolled material (P) from being in contact with the heater portion (2).
Description
DESCRIPTION
INDUCTION HEATER DEVICE
TECHNICAL FIELD
The present invention relates to an induction heater device used for heating rolled material as subj ect-to-heating material in a hot rolling production line.
BACKGROUND ART
In a hot rolling production line, rolled steel heated up to a temperature at which the rolled steel is capable of being rolled is roughly rolled by means of a roughing mill, and is subsequently formed into a so-called rough bar. Subsequently, the rough bar is temporarily coiled into a coil by means of a coil box. Thereafter, the rough bar is un-coiled from the coil box, and rolled by means of a finishing mill, and then a product of rolled material having a desired thickness and width is obtained.
In such a hot rolling line, the rough bar un-coiled from the coil box is in general re-heated by means of a device for heating in total width, referred to as a bar heater, or a device for heating only edges, referred to as an edge heater.
For example, in Japanese Patent Application Laid-open H06-320202, an art to dispose an induction heater device comprised of a bar heater or an edge heater between a coil box and a descaling device so as to prevent temperature decrease in the descaling device is disclosed.
However, as shown in Fig. 6, as the rolled material P is coiled in the coiled box B, it will considerably wave after un-coiling from the coil box B. In a case where the rolled material P as being wavily warped in such a way is heated by means of edge heaters 2a, 2b, inconveniences in which the rolled material P collides with the edge heaters 2a, 2b unless an inductor gap is widened may arise, when prior induction heater devices are applied thereto. Further, a widened inductor gap is inconvenient in that it causes decrease in a heating ability or power.
DISCLOSURE OF INVENTION
The present invention has been achieved in view of solving the aforementioned inconveniences and its object is to provide an induction heater device, which levels the warp of the roughly rolled material un-coiled from the coil box and is therefore capable of substantially improving a heating ability.
To achieve the object, a first aspect of the present invention provides an induction heater device comprised of a heater portion having a predetermined gap therein configured to heat a subject-to-heating material in the gap by means of high-frequency induction, a conveyor portion configured to convey the subject-to-heating material to pass through the gap, and a leveler portion configured to level a warp of the subject-to-heating material so as not to bring the subject-to-heating material into contact with the heater portion.
In accordance with the first aspect, because the lever portion configured to level a warp of the subject-to-heating material so as not to bring the subj ect-to-heating material into contact with the heater portion is provided, a height of the warp of the rolled material un-coiled from the coil box is limited to a predetermined height. Therefore, the gap of the heater portion is enabled to be narrowed. Therefore, the subject-to-heating material can be effectively heated, and it leads to substantial improvement of the heating ability of the heater.
A second aspect of the present invention provides the induction heater device according to the first aspect in that the aforementioned leveler portion includes an entrance leveler portion provided at an entrance of the gap which the subject-to-heating material enters.
In accordance with the second aspect, the height of the warp of the rolled material is limited by means of the entrance leveler portion in advance of entrance into the gap.
A third aspect of the present invention provides the induction heater device according to the first aspect in that the leveler portion includes an entrance leveler portion provided at an entrance of the gap which the subject-to-heating material enters, and an exit leveler portion provided at an exit of the gap which the subject-to-heating material exits.
In accordance with the third aspect, because the height of the warp of the rolled material can be limited further at the entrance as the exit leveler portion is provided at the exit of the gap of the heater portion in addition to the entrance leveler portion, the height of the warp is limited even in a case where a leading portion of the rolled material is warped up as a result of that a trailing portion of the rolled material is pressed down at the entrance leveler portion.
A fourth aspect of the present invention provides the induction heater device according to the third aspect in that the leveler portion further includes an intermediate leveler portion provided in between the entrance leveler portion and the exit leveler portion.
In accordance with the fourth aspect, even when the trailing portion is pressed down and the leading portion is, in response thereto, warped up, the height of the warp is limited by means of the intermediate leveler portion as with the exit leveler portion.
A fifth aspect of the present invention provides the aforementioned induction heater device in that the entrance leveler portion is comprised of a guiding portion sloping downward relative to a direction of conveyance of the subject-to-heating material, and a leveling face provided in parallel with a plane of conveyance of the subject-to-heating material.
In accordance with the fifth aspect, because the rolled material is pressed down by means of the guiding portion even in a case where the height of the warp of the rolled material conveyed from the heater portion exceeds a predetermined height, 5 the height of the warp is effectively limited.
A sixth aspect of the present invention provides the aforementioned induction heater device in that the entrance leveler portion is further comprised of an adjuster mechanism which makes a height of a leveling position at which the entrance leveler portion abuts on the subject-to-heating material variable. Further, a seventh aspect of the present invention provides the aforementioned induction heater device in that the exit leveler portion is further comprised of an adjuster mechanism which makes a height of a leveling position at which the exitleveler portion abuts on onthe subject-to-heatimaterial variable.
In accordance with these aspects, because the height of the entrance leveler portion and/or the exit leveler portion can be set variable by means of the height adjuster mechanism, a leveling amount can be steadily kept optimal depending on a thickness of the subject-to-heating material and an interval of the gap of the heater portion.
An eighth aspect of the present invention provides the induction heater device in accordance with the aforementioned aspect in that the aforementioned entrance leveler portion is a rectangular tube, which has an exit having a lower height than a height of an entrance which the subject-to-heating material enters, and a sloping portion provided in between the entrance and the exit, configured to level the warp of the subject-to-heating material by means of the sloping portion.
In accordance with the eighth aspect, because the sloping portion slopes downward relative to a conveyance direction of the subject-to-heating material, the rolled material is pressed down by means of the sloping portion after entering through the entrance and thereby the height of the warp of the rolled material is limited in a case where the rolled material is warped upward as higher than a height of the exit.
In another aspect, the invention provides an induction heater device, comprising:
a heater portion having a predetermined gap and being configured to heat a subject-to-heating material in the gap by means of high-frequency induction;
a conveyor portion configured to convey the subject-to-heating material to pass through the gap;
and a leveler portion configured to level a warp of the subject-to-heating material so as not to bring the subject-to-heating material into contact with the heater portion;
wherein the leveler portion includes an entrance leveler portion provided at an entrance of the gap which the subject-to-heating material enters, and an exit leveler portion provided at an exit of the gap which the subject-to-heating material exits; and 6a wherein the entrance leveler portion comprises a guiding portion sloping downward relative to a direction of conveyance of the subject-to-heating material, and a leveling face provided in parallel with a plane of conveyance of the subject-to-heating material.
BRIEF DESCRIPTION OF THE DRAWINGS
(FIG. 1] Fig. 1(a) is a schematic plan view showing an induction heater device in accordance with a first embodiment of the present invention, and Fig. 1 (b) is a schematic side view showing the induction heater device in accordance with the first embodiment of the present invention.
[FIG. 21 Fig. 2 is a graph showing a heating power of an edge heater of the induction heater devicd in accordance with the first embodiment of the present invention.
[FIG. 31 Fig. 3 is a schematic side view showing an induction heater device in accordance with a second embodiment of the present invention.
(FIG. 4] Fig. 4(a) is a schematic plan view showing an essential portion of the induction heater device in accordance with the second embodiment of the present invention, and Fig.
4 (b) is a perspective view showing an essential portion of the induction heater device in accordance with the second embodiment of the present invention.
[FIG. 5] Fig. 5 is a side view showing an induction heater device in accordance with another embodiment of the present invention.
[FIG. 6] Fig. 6 is a drawing of a constitution of a prior induction heater device.
BEST MODE FOR CARRYING OUT THE INVENTION
Preferred embodiments of the present invention will be described hereinafter with reference to the appended drawings.
(1) FIRST EMBODIMENT
(1-1) CONSTITUTION
An induction heater device 1 in accordance with a first embodiment of the present invention is, as shown in Fig. 1, disposed downstream relative to a coil box B in a direction of conveyance of rolled material P un-coiled from the coil box B.
The induction heater device 1 is constituted of a heater portion 2, a plurality of feeder rollers R and a leveler portion 3.
The heater portion 2 includes edge heaters 2a, 2b which respectively have inductors and, by means of high-frequency induction, heat a subj ect-to-heating material. More concretely, a pair of edge heaters 2a are disposed at a position close to the coil box B in the aforementioned direction of conveyance, and are opposed to each other to have a gap therebetween in the perpendicular direction. Further, another pair of edge heaters 2a are provided so as to have a gap therebetween in a direction which horizontally crosses the aforementioned direction of conveyance at right angles. On the other hand, a pair of edge heaters 2b are disposed downstream relative to the edge heaters 2a in the direction of conveyance, and are opposed to each other to have a gap therebetween in the perpendicular direction.
Further, another pair of edge heaters 2b are provided so as to have a gap therebetweenin a direction which horizontally crosses the aforementioned direction of conveyance at right angles.
Meanwhile, the edge heaters 2a (2b) are disposed so that edge portions, in its lateral direction, of the rolled material P, which is conveyed by the feeder rollers R, are inserted into gaps thereof in the perpendicular direction, and mainly heat the edge portions.
The plurality of feeder rollers R convey the subject-to-heating material to pass through the gap of the edge heaters 2a and the gap of the edge heaters 2b. A plane formed by uppermost portions of the respective feeder rollers R is defined as a conveyance plane F, and a height measured from the conveyance plane F to the edge heaters 2a, 2b is defined as an inductor height Hi hereinafter (Fig. 1(b)).
The leveler portion 3 is composed of an entrance leveler portion 4, an exit leveler portion 5 and an intermediate leveler portion 6 disposed therebetween, and disposed so as to form the letter of "H" when viewed from the above position as shown in Fig. 1 (a) . The leveler portion 3 levels a warp of the subject-to-heating material so as not to bring the subject-to-heating material passing through the edge heater 2a (2b) into contact with the edge heater 2a, 2b.
In detail, the entrance leveler portion 4 is disposed upstream relative to the edge heaters 2a and at a position at a predetermined height from the conveyance plane F. Further, the entrance leveler portion 4 has a greater width than a width of the rolled material P. A cross section of the entrance leveler portion 4 is, as shown in Fig. 1 (b) , a reversed trapezoid shape.
More specifically, the entrance leveler portion 4 has a guiding portion 4a sloping downward relative to the conveyance plane F so as to press down the warped rolled material P, and a leveling face 4b for curing an amount of the warp (a height) of the rolled material P, which is provided in parallel with the conveyance plane F.
The exit leveler portion 5 is disposed downstream relative to the edge heaters 2b in the direction of conveyance. Further, the exit leveler portion 5 has a greater width than a width of the rolled material P. As with the entrance leveler portion 4, the exit leveler portion 5 has a guiding portion 5a and a leveling face 5b and is so configured that a cross section thereof isa reversed trapezoid shape. Further, the exit leveler portion 5 is so disposed that a lower face of the leveling face 5b is at a predetermined height from the conveyance plane F, or preferably at the same height as the entrance leveler portion 4.
The intermediate leveler portion 6, as shown in Fig. 1 (b) , has a substantially rectangular planer shape when viewed from 5 its side face, and is provided in between the entrance leveler portion 4 and the exit leveler portion 6. The lower face of the intermediate leveler portion 6 is disposed at the same height (h) as the leveling face 4b of the entrance leveler portion 4 and the leveling face 5b of the exit leveler portion 5. Further, 10 the intermediate leveler portion 6 is, in the present embodiment, disposed above the rolled material P and at the center in the lateral direction of the rolled material P, and further along the direction of conveyance.
Meanwhile, the entrance leveler portion 4, the intermediate leveler portion 6 and the exit leveler portion 5 (the leveler portion 3) are constituted so that the aforementioned height h is lower than the inductor height Hi.
More concretely, upon calculating a position where heating power of the edge heaters becomes a maximum, the edge heaters 2a, 2b are preferably set lower than the position. Fig. 2 shows an inductor height (Hi) dependency of heating power of the edge heaters. As illustrated in Fig. 2, the heating power comes to be a maximum in a case where the inductor height Hi is 120mm, therefore preferably the inductor height Hi should be set 120mm and the height h of the leveling face should be 120mm or less, for example 100mm. Further, the height h of the leveling face can be determined in light of a thickness of the rolled material P as the subject-to-heating material, as well as the heating power of the edge heaters.
The induction heater device 1 in accordance with the present embodiment as structured as above functions in the following manner.
The rolled material P is uncoiled from the coil box B and conveyed to the induction heater device 1 by means of the feeder rollers R.
In a case where a height of the warp of the rolled material P, which is measured from the conveyance plane F, is greater than the height h (100mm, for example) of the leveling face 4b, the rolled material P is brought into contact with the guiding portion 4a of the entrance leveler portion 4 and therefore pressed down by the slope of the guiding portion 4a. Next, the height of the warp of the rolled material P is limited to be smaller than the height h of the leveling face 4b or later. Next, the rolled material P, the height of the warp of which is limited in such a way, is further conveyed by means of the feeder roller R and reaches the gap between the edge heaters 2b. In the course of this, the height of the warp of the rolled material P is limited to be the height h or lower by means of the intermediate leveler portion 6. Further, when the rolled material P passes through the edge heaters 2b, the height of the warp of the rolled material P is limited to be the height h or lower by means of the exit leveler portion 6.
INDUCTION HEATER DEVICE
TECHNICAL FIELD
The present invention relates to an induction heater device used for heating rolled material as subj ect-to-heating material in a hot rolling production line.
BACKGROUND ART
In a hot rolling production line, rolled steel heated up to a temperature at which the rolled steel is capable of being rolled is roughly rolled by means of a roughing mill, and is subsequently formed into a so-called rough bar. Subsequently, the rough bar is temporarily coiled into a coil by means of a coil box. Thereafter, the rough bar is un-coiled from the coil box, and rolled by means of a finishing mill, and then a product of rolled material having a desired thickness and width is obtained.
In such a hot rolling line, the rough bar un-coiled from the coil box is in general re-heated by means of a device for heating in total width, referred to as a bar heater, or a device for heating only edges, referred to as an edge heater.
For example, in Japanese Patent Application Laid-open H06-320202, an art to dispose an induction heater device comprised of a bar heater or an edge heater between a coil box and a descaling device so as to prevent temperature decrease in the descaling device is disclosed.
However, as shown in Fig. 6, as the rolled material P is coiled in the coiled box B, it will considerably wave after un-coiling from the coil box B. In a case where the rolled material P as being wavily warped in such a way is heated by means of edge heaters 2a, 2b, inconveniences in which the rolled material P collides with the edge heaters 2a, 2b unless an inductor gap is widened may arise, when prior induction heater devices are applied thereto. Further, a widened inductor gap is inconvenient in that it causes decrease in a heating ability or power.
DISCLOSURE OF INVENTION
The present invention has been achieved in view of solving the aforementioned inconveniences and its object is to provide an induction heater device, which levels the warp of the roughly rolled material un-coiled from the coil box and is therefore capable of substantially improving a heating ability.
To achieve the object, a first aspect of the present invention provides an induction heater device comprised of a heater portion having a predetermined gap therein configured to heat a subject-to-heating material in the gap by means of high-frequency induction, a conveyor portion configured to convey the subject-to-heating material to pass through the gap, and a leveler portion configured to level a warp of the subject-to-heating material so as not to bring the subject-to-heating material into contact with the heater portion.
In accordance with the first aspect, because the lever portion configured to level a warp of the subject-to-heating material so as not to bring the subj ect-to-heating material into contact with the heater portion is provided, a height of the warp of the rolled material un-coiled from the coil box is limited to a predetermined height. Therefore, the gap of the heater portion is enabled to be narrowed. Therefore, the subject-to-heating material can be effectively heated, and it leads to substantial improvement of the heating ability of the heater.
A second aspect of the present invention provides the induction heater device according to the first aspect in that the aforementioned leveler portion includes an entrance leveler portion provided at an entrance of the gap which the subject-to-heating material enters.
In accordance with the second aspect, the height of the warp of the rolled material is limited by means of the entrance leveler portion in advance of entrance into the gap.
A third aspect of the present invention provides the induction heater device according to the first aspect in that the leveler portion includes an entrance leveler portion provided at an entrance of the gap which the subject-to-heating material enters, and an exit leveler portion provided at an exit of the gap which the subject-to-heating material exits.
In accordance with the third aspect, because the height of the warp of the rolled material can be limited further at the entrance as the exit leveler portion is provided at the exit of the gap of the heater portion in addition to the entrance leveler portion, the height of the warp is limited even in a case where a leading portion of the rolled material is warped up as a result of that a trailing portion of the rolled material is pressed down at the entrance leveler portion.
A fourth aspect of the present invention provides the induction heater device according to the third aspect in that the leveler portion further includes an intermediate leveler portion provided in between the entrance leveler portion and the exit leveler portion.
In accordance with the fourth aspect, even when the trailing portion is pressed down and the leading portion is, in response thereto, warped up, the height of the warp is limited by means of the intermediate leveler portion as with the exit leveler portion.
A fifth aspect of the present invention provides the aforementioned induction heater device in that the entrance leveler portion is comprised of a guiding portion sloping downward relative to a direction of conveyance of the subject-to-heating material, and a leveling face provided in parallel with a plane of conveyance of the subject-to-heating material.
In accordance with the fifth aspect, because the rolled material is pressed down by means of the guiding portion even in a case where the height of the warp of the rolled material conveyed from the heater portion exceeds a predetermined height, 5 the height of the warp is effectively limited.
A sixth aspect of the present invention provides the aforementioned induction heater device in that the entrance leveler portion is further comprised of an adjuster mechanism which makes a height of a leveling position at which the entrance leveler portion abuts on the subject-to-heating material variable. Further, a seventh aspect of the present invention provides the aforementioned induction heater device in that the exit leveler portion is further comprised of an adjuster mechanism which makes a height of a leveling position at which the exitleveler portion abuts on onthe subject-to-heatimaterial variable.
In accordance with these aspects, because the height of the entrance leveler portion and/or the exit leveler portion can be set variable by means of the height adjuster mechanism, a leveling amount can be steadily kept optimal depending on a thickness of the subject-to-heating material and an interval of the gap of the heater portion.
An eighth aspect of the present invention provides the induction heater device in accordance with the aforementioned aspect in that the aforementioned entrance leveler portion is a rectangular tube, which has an exit having a lower height than a height of an entrance which the subject-to-heating material enters, and a sloping portion provided in between the entrance and the exit, configured to level the warp of the subject-to-heating material by means of the sloping portion.
In accordance with the eighth aspect, because the sloping portion slopes downward relative to a conveyance direction of the subject-to-heating material, the rolled material is pressed down by means of the sloping portion after entering through the entrance and thereby the height of the warp of the rolled material is limited in a case where the rolled material is warped upward as higher than a height of the exit.
In another aspect, the invention provides an induction heater device, comprising:
a heater portion having a predetermined gap and being configured to heat a subject-to-heating material in the gap by means of high-frequency induction;
a conveyor portion configured to convey the subject-to-heating material to pass through the gap;
and a leveler portion configured to level a warp of the subject-to-heating material so as not to bring the subject-to-heating material into contact with the heater portion;
wherein the leveler portion includes an entrance leveler portion provided at an entrance of the gap which the subject-to-heating material enters, and an exit leveler portion provided at an exit of the gap which the subject-to-heating material exits; and 6a wherein the entrance leveler portion comprises a guiding portion sloping downward relative to a direction of conveyance of the subject-to-heating material, and a leveling face provided in parallel with a plane of conveyance of the subject-to-heating material.
BRIEF DESCRIPTION OF THE DRAWINGS
(FIG. 1] Fig. 1(a) is a schematic plan view showing an induction heater device in accordance with a first embodiment of the present invention, and Fig. 1 (b) is a schematic side view showing the induction heater device in accordance with the first embodiment of the present invention.
[FIG. 21 Fig. 2 is a graph showing a heating power of an edge heater of the induction heater devicd in accordance with the first embodiment of the present invention.
[FIG. 31 Fig. 3 is a schematic side view showing an induction heater device in accordance with a second embodiment of the present invention.
(FIG. 4] Fig. 4(a) is a schematic plan view showing an essential portion of the induction heater device in accordance with the second embodiment of the present invention, and Fig.
4 (b) is a perspective view showing an essential portion of the induction heater device in accordance with the second embodiment of the present invention.
[FIG. 5] Fig. 5 is a side view showing an induction heater device in accordance with another embodiment of the present invention.
[FIG. 6] Fig. 6 is a drawing of a constitution of a prior induction heater device.
BEST MODE FOR CARRYING OUT THE INVENTION
Preferred embodiments of the present invention will be described hereinafter with reference to the appended drawings.
(1) FIRST EMBODIMENT
(1-1) CONSTITUTION
An induction heater device 1 in accordance with a first embodiment of the present invention is, as shown in Fig. 1, disposed downstream relative to a coil box B in a direction of conveyance of rolled material P un-coiled from the coil box B.
The induction heater device 1 is constituted of a heater portion 2, a plurality of feeder rollers R and a leveler portion 3.
The heater portion 2 includes edge heaters 2a, 2b which respectively have inductors and, by means of high-frequency induction, heat a subj ect-to-heating material. More concretely, a pair of edge heaters 2a are disposed at a position close to the coil box B in the aforementioned direction of conveyance, and are opposed to each other to have a gap therebetween in the perpendicular direction. Further, another pair of edge heaters 2a are provided so as to have a gap therebetween in a direction which horizontally crosses the aforementioned direction of conveyance at right angles. On the other hand, a pair of edge heaters 2b are disposed downstream relative to the edge heaters 2a in the direction of conveyance, and are opposed to each other to have a gap therebetween in the perpendicular direction.
Further, another pair of edge heaters 2b are provided so as to have a gap therebetweenin a direction which horizontally crosses the aforementioned direction of conveyance at right angles.
Meanwhile, the edge heaters 2a (2b) are disposed so that edge portions, in its lateral direction, of the rolled material P, which is conveyed by the feeder rollers R, are inserted into gaps thereof in the perpendicular direction, and mainly heat the edge portions.
The plurality of feeder rollers R convey the subject-to-heating material to pass through the gap of the edge heaters 2a and the gap of the edge heaters 2b. A plane formed by uppermost portions of the respective feeder rollers R is defined as a conveyance plane F, and a height measured from the conveyance plane F to the edge heaters 2a, 2b is defined as an inductor height Hi hereinafter (Fig. 1(b)).
The leveler portion 3 is composed of an entrance leveler portion 4, an exit leveler portion 5 and an intermediate leveler portion 6 disposed therebetween, and disposed so as to form the letter of "H" when viewed from the above position as shown in Fig. 1 (a) . The leveler portion 3 levels a warp of the subject-to-heating material so as not to bring the subject-to-heating material passing through the edge heater 2a (2b) into contact with the edge heater 2a, 2b.
In detail, the entrance leveler portion 4 is disposed upstream relative to the edge heaters 2a and at a position at a predetermined height from the conveyance plane F. Further, the entrance leveler portion 4 has a greater width than a width of the rolled material P. A cross section of the entrance leveler portion 4 is, as shown in Fig. 1 (b) , a reversed trapezoid shape.
More specifically, the entrance leveler portion 4 has a guiding portion 4a sloping downward relative to the conveyance plane F so as to press down the warped rolled material P, and a leveling face 4b for curing an amount of the warp (a height) of the rolled material P, which is provided in parallel with the conveyance plane F.
The exit leveler portion 5 is disposed downstream relative to the edge heaters 2b in the direction of conveyance. Further, the exit leveler portion 5 has a greater width than a width of the rolled material P. As with the entrance leveler portion 4, the exit leveler portion 5 has a guiding portion 5a and a leveling face 5b and is so configured that a cross section thereof isa reversed trapezoid shape. Further, the exit leveler portion 5 is so disposed that a lower face of the leveling face 5b is at a predetermined height from the conveyance plane F, or preferably at the same height as the entrance leveler portion 4.
The intermediate leveler portion 6, as shown in Fig. 1 (b) , has a substantially rectangular planer shape when viewed from 5 its side face, and is provided in between the entrance leveler portion 4 and the exit leveler portion 6. The lower face of the intermediate leveler portion 6 is disposed at the same height (h) as the leveling face 4b of the entrance leveler portion 4 and the leveling face 5b of the exit leveler portion 5. Further, 10 the intermediate leveler portion 6 is, in the present embodiment, disposed above the rolled material P and at the center in the lateral direction of the rolled material P, and further along the direction of conveyance.
Meanwhile, the entrance leveler portion 4, the intermediate leveler portion 6 and the exit leveler portion 5 (the leveler portion 3) are constituted so that the aforementioned height h is lower than the inductor height Hi.
More concretely, upon calculating a position where heating power of the edge heaters becomes a maximum, the edge heaters 2a, 2b are preferably set lower than the position. Fig. 2 shows an inductor height (Hi) dependency of heating power of the edge heaters. As illustrated in Fig. 2, the heating power comes to be a maximum in a case where the inductor height Hi is 120mm, therefore preferably the inductor height Hi should be set 120mm and the height h of the leveling face should be 120mm or less, for example 100mm. Further, the height h of the leveling face can be determined in light of a thickness of the rolled material P as the subject-to-heating material, as well as the heating power of the edge heaters.
The induction heater device 1 in accordance with the present embodiment as structured as above functions in the following manner.
The rolled material P is uncoiled from the coil box B and conveyed to the induction heater device 1 by means of the feeder rollers R.
In a case where a height of the warp of the rolled material P, which is measured from the conveyance plane F, is greater than the height h (100mm, for example) of the leveling face 4b, the rolled material P is brought into contact with the guiding portion 4a of the entrance leveler portion 4 and therefore pressed down by the slope of the guiding portion 4a. Next, the height of the warp of the rolled material P is limited to be smaller than the height h of the leveling face 4b or later. Next, the rolled material P, the height of the warp of which is limited in such a way, is further conveyed by means of the feeder roller R and reaches the gap between the edge heaters 2b. In the course of this, the height of the warp of the rolled material P is limited to be the height h or lower by means of the intermediate leveler portion 6. Further, when the rolled material P passes through the edge heaters 2b, the height of the warp of the rolled material P is limited to be the height h or lower by means of the exit leveler portion 6.
In accordance with the aforementioned constitution, because the height of the warp of the rolled material P is limited to be the height h (100mm) or lower by means of the leveler portion 3, the rolled material P is prevented from being in contact with the edge heaters 2a, 2b, thereby the edge heaters 2a, 2b are prevented from being damaged or malfunctioning.
Further, supposing that the edge heaters are installed to have wider gaps than the height of the warp of the rolled material P for the purpose of prevention of contact, portions warping upward in the rolled material P can be suf ficiently heated but portions just above the conveyance plane F (lower portions) come to be insufficient in being heated. Further, if one would have the lower portions heated sufficiently, heaters having greater capacities would be required and therefore increase in electric power consumption could not be avoided, because electric power supplied to the edge heaters must be increased. However, according to the induction heater device 1 in accordance with the present embodiment, by means of the leveler portion 3, the inductor height Hi can be reduced, therefore the electric power consumption is prevented from unnecessary increase and heating with high efficiency is enabled because the rolled material can be unitarily heated.
Further, because the entrance leveler portion 4 is, by having the guiding portion 4a and the leveling face 4b, formed to be a reversed trapezoid shape, the rolled material P under conveyance is pressed down by the guiding portion 4a and subsequently pressed by the leveling face 4b so that the height of the warp is limited. In this way, the height of the warp of the rolled material P is smoothly limited and the rolled material P is prevented frombeing in contact with the edge heaters 2a.
Even if a warp of a leading portion of the rolled material P is limited at the entrance leveler portion 4, in a case where the leading portion passes through the edge heaters 2a, 2b, when a warp of following portions following the leading portion is limited by means of the entrance leveler portion 4, the leading portion is susceptible of warping upward and coming into contact with the edge heaters 2a, 2b. However, in the present embodiment, by means of the entrance leveler portion 5 and the intermediate leveler portion 6 provided between the exit leveler portion 4 and the exit leveler portion 5, even in a case where the leading portion warps upward in response to a downward press of the following portions by the entrance leveler portion 4, its height of the warp is limited. Thereby the rolled material P is prevented from being in contact with the edge heaters 2a, 2b.
Furthermore, according to the induction heater device 1 in accordance with the present embodiment, the height of the warp of the rolled material P is totally in its lateral direction limited at the exits of the edge heaters 2a, 2b, therefore the rolled material P is limited within a predetermined height as a whole.
In the aforementioned manner, by means of the entrance leveler portion 4, the exit leveler portion5 and the intermediate leveler portion 6, the rolled material P passing through the heater portion 2 as a whole is limited within a predetermined height h or a lower height. As a result, the inductor height Hi can be lowered and heating ability of the edge heaters 2a, 2b can be effectively utilized, and further, the rolled material P is prevented from being in contact with the edge heaters 2a, 2b.
(2) SECOND EMBODIMENT
As compared with the induction heater device 1 of the first embodiment, an induction heater device 10 in accordance with a second embodiment of the present invention is identical in points of the constitution and the arrangement of the edge heaters and the feeder rollers R and, on the other hand, different therefrom in points of concrete constitutions of the leveler portion 3. The following description will weigh on differences therebetween. Further, any structure or member identical or similar to the structure or member in the first embodiment will be referred to by an identical reference sign and repeating descriptions will be omitted.
As shown in Fig. 3, a leveler portion in the second embodiment has an entrance leveler portion 11, an exit leveler portion 12 and an intermediate leveler portion 13.
The entrance leveler portion 11 is disposed upstream relative to the edge heaters 2a and is provided with a height adjuster mechanism lla and a leveling roll llb provided at a lower portion ofthe height adjuster mechanismlla. The leveling roll llb has a cylindrical shape and elongatedly exists in parallel with the conveyance plane F as being longer than the width of the rolled material P. Further, the leveling roll lib 5 is, at the lowermost end (contact point), capable of getting into contact with the rolled material P conveyed into the gap between the edge heaters 2a (2b) by means of the feeder rollers R. The height adjuster mechanisms lla, lib are, for example, constituted with using a motor, ball screws and such, and adjust 10 the height of the leveling roll 1lb provided below it. Meanwhile, the height adjuster mechanism 11a can be constituted by any known means.
The exit leveler portion 12 is disposed downstream relative to the edge heaters 2b, which is disposed downstream relative 15 to the edge heaters 2a in regard to the direction of conveyance of the rolled material P. The exit leveler portion 12 has a height adjuster mechanism 12a and a leveling roll 12b, which are respectively constituted and function in similar ways as the height adjuster mechanism lla and the leveling roll 12a of the entrance leveler portion 11.
Further, the intermediate leveler portion 13 is constituted to be a substantially rectangular planer shape and attached to the height adjuster mechanisms lla, 12a. In more detail, a height of a leveling face of a bar-like shape as a lowermost end of the intermediate leveler portion 13 from the conveyance plane F is the same as the height of the contact points of the leveling rolls lib, 12b from the conveyance plane F.
Further, as being attached to the height adjuster mechanisms 1la, 12a, the intermediate leveler portion 13 is capable of moving upward and downward along with the leveling rolls llb, 12b in accordance with up-and-down movements of the height adjuster mechanisms 11a, 12a. Therefore, a contact point (leveling point) of the intermediate leveler portion 13 and leveling faces of the leveling rolls llb, 12b are steadily kept in the same height.
As described above, the heater device 10 in accordance with the second embodiment provides effects of the first embodiment and is further capable of determining and regulating the heights of the leveling points of the leveling rolls lib, 12 and the leveling point of the leveling roll 13 by means of the height adjuster mechanisms 11a, 12a at will. Therefore, it is enabled to assure the height of the leveling points or the leveling plane from the conveyance plane F at optimal values steadily on the basis of the thickness of the rolled material and the inductor height.
Therefore, the height of the warp of the rolled material un-coiled from the coil box and conveyed to the induction heater device 10 can be limited within an optimally set value or lower.
Consequently, it is enabled to reduce the inductor heights Hi of the edge heaters 2a, 2b and therefore the edge heaters 2a, 2b are allowed to be efficiently operated. Further, the heating ability of the edge heaters 2a, 2b can be practically improved.
Further, supposing that the edge heaters are installed to have wider gaps than the height of the warp of the rolled material P for the purpose of prevention of contact, portions warping upward in the rolled material P can be suf ficiently heated but portions just above the conveyance plane F (lower portions) come to be insufficient in being heated. Further, if one would have the lower portions heated sufficiently, heaters having greater capacities would be required and therefore increase in electric power consumption could not be avoided, because electric power supplied to the edge heaters must be increased. However, according to the induction heater device 1 in accordance with the present embodiment, by means of the leveler portion 3, the inductor height Hi can be reduced, therefore the electric power consumption is prevented from unnecessary increase and heating with high efficiency is enabled because the rolled material can be unitarily heated.
Further, because the entrance leveler portion 4 is, by having the guiding portion 4a and the leveling face 4b, formed to be a reversed trapezoid shape, the rolled material P under conveyance is pressed down by the guiding portion 4a and subsequently pressed by the leveling face 4b so that the height of the warp is limited. In this way, the height of the warp of the rolled material P is smoothly limited and the rolled material P is prevented frombeing in contact with the edge heaters 2a.
Even if a warp of a leading portion of the rolled material P is limited at the entrance leveler portion 4, in a case where the leading portion passes through the edge heaters 2a, 2b, when a warp of following portions following the leading portion is limited by means of the entrance leveler portion 4, the leading portion is susceptible of warping upward and coming into contact with the edge heaters 2a, 2b. However, in the present embodiment, by means of the entrance leveler portion 5 and the intermediate leveler portion 6 provided between the exit leveler portion 4 and the exit leveler portion 5, even in a case where the leading portion warps upward in response to a downward press of the following portions by the entrance leveler portion 4, its height of the warp is limited. Thereby the rolled material P is prevented from being in contact with the edge heaters 2a, 2b.
Furthermore, according to the induction heater device 1 in accordance with the present embodiment, the height of the warp of the rolled material P is totally in its lateral direction limited at the exits of the edge heaters 2a, 2b, therefore the rolled material P is limited within a predetermined height as a whole.
In the aforementioned manner, by means of the entrance leveler portion 4, the exit leveler portion5 and the intermediate leveler portion 6, the rolled material P passing through the heater portion 2 as a whole is limited within a predetermined height h or a lower height. As a result, the inductor height Hi can be lowered and heating ability of the edge heaters 2a, 2b can be effectively utilized, and further, the rolled material P is prevented from being in contact with the edge heaters 2a, 2b.
(2) SECOND EMBODIMENT
As compared with the induction heater device 1 of the first embodiment, an induction heater device 10 in accordance with a second embodiment of the present invention is identical in points of the constitution and the arrangement of the edge heaters and the feeder rollers R and, on the other hand, different therefrom in points of concrete constitutions of the leveler portion 3. The following description will weigh on differences therebetween. Further, any structure or member identical or similar to the structure or member in the first embodiment will be referred to by an identical reference sign and repeating descriptions will be omitted.
As shown in Fig. 3, a leveler portion in the second embodiment has an entrance leveler portion 11, an exit leveler portion 12 and an intermediate leveler portion 13.
The entrance leveler portion 11 is disposed upstream relative to the edge heaters 2a and is provided with a height adjuster mechanism lla and a leveling roll llb provided at a lower portion ofthe height adjuster mechanismlla. The leveling roll llb has a cylindrical shape and elongatedly exists in parallel with the conveyance plane F as being longer than the width of the rolled material P. Further, the leveling roll lib 5 is, at the lowermost end (contact point), capable of getting into contact with the rolled material P conveyed into the gap between the edge heaters 2a (2b) by means of the feeder rollers R. The height adjuster mechanisms lla, lib are, for example, constituted with using a motor, ball screws and such, and adjust 10 the height of the leveling roll 1lb provided below it. Meanwhile, the height adjuster mechanism 11a can be constituted by any known means.
The exit leveler portion 12 is disposed downstream relative to the edge heaters 2b, which is disposed downstream relative 15 to the edge heaters 2a in regard to the direction of conveyance of the rolled material P. The exit leveler portion 12 has a height adjuster mechanism 12a and a leveling roll 12b, which are respectively constituted and function in similar ways as the height adjuster mechanism lla and the leveling roll 12a of the entrance leveler portion 11.
Further, the intermediate leveler portion 13 is constituted to be a substantially rectangular planer shape and attached to the height adjuster mechanisms lla, 12a. In more detail, a height of a leveling face of a bar-like shape as a lowermost end of the intermediate leveler portion 13 from the conveyance plane F is the same as the height of the contact points of the leveling rolls lib, 12b from the conveyance plane F.
Further, as being attached to the height adjuster mechanisms 1la, 12a, the intermediate leveler portion 13 is capable of moving upward and downward along with the leveling rolls llb, 12b in accordance with up-and-down movements of the height adjuster mechanisms 11a, 12a. Therefore, a contact point (leveling point) of the intermediate leveler portion 13 and leveling faces of the leveling rolls llb, 12b are steadily kept in the same height.
As described above, the heater device 10 in accordance with the second embodiment provides effects of the first embodiment and is further capable of determining and regulating the heights of the leveling points of the leveling rolls lib, 12 and the leveling point of the leveling roll 13 by means of the height adjuster mechanisms 11a, 12a at will. Therefore, it is enabled to assure the height of the leveling points or the leveling plane from the conveyance plane F at optimal values steadily on the basis of the thickness of the rolled material and the inductor height.
Therefore, the height of the warp of the rolled material un-coiled from the coil box and conveyed to the induction heater device 10 can be limited within an optimally set value or lower.
Consequently, it is enabled to reduce the inductor heights Hi of the edge heaters 2a, 2b and therefore the edge heaters 2a, 2b are allowed to be efficiently operated. Further, the heating ability of the edge heaters 2a, 2b can be practically improved.
(3) THIRD EMBODIMENT
As compared with the induction heater devices 1, 10 according to the first and second embodiments, an induction heater device 20 in accordance with a third embodiment of the present invention is identical thereto in points of the constitution and the arrangement of the edge heaters and the feeder roller R and, on the other hand, different therefrom in points of concrete constitutions of the entrance leveler portion of the leveler portion. The following description will weigh on differences therefrom. Further, any structure or member identical or similar to the structure or member in the first embodiment will be referred to by an identical reference sign and repeating descriptions will be omitted.
In the induction heater device 20 in accordance with the third embodiment, an entrance leveler portion 21 is, as shown in Fig. 4, substantially a hexadron in which two faces thereof perpendicular to the direction of conveyance of the rolled material P open and side faces along the direction are trapezoid shapes. In more detail, the entrance leveler portion 21 has a broad opening portion 21a opposed to an incoming direction of the rolledmaterial P, and a narrow opening portion 21b provided downstream relative to the broad opening portion 21a in respect to the direction. A bottom face of the entrance leveler portion 21 forms an identical plane to the conveyance plane F. A height of the broad opening portion 21a is set to be substantially identical to the inductor heights of the edge heaters 2a, 2b, and a height of the narrow opening portion 21b is set to be a height to which a height of the warp of the rolled material P
isto belimited. By difference between the broad opening portion 21a and the narrow opening portion 21b, an upper inner face 21c of the entrance leveler portion 21 slopes downward along the direction of conveyance of the rolled material P.
In accordance with the aforementioned constitution, the rolled material P un-coiled from the coil box enters the entrance leveler portion 21 via the broad opening portion 21a before reaching the edge heaters 2a. Subsequently, the rolled material P progresses with having the height of the warp thereof limited along the upper inner face of the entrance leveler portion 21, and goes out of the narrow opening portion 21b of the entrance leveler portion 21.
Subsequently, the rolled material P is capable of passing through the induction heater device 20 with having' the height of the warp limited by the operations of the intermediate leveler portion and the exit leveler portion as described in the first and second embodiments. More specifically, also by the third embodiment, because the height of the warp of the rolled material P can be kept to be an optimum set value or lower, the edge heaters 2a, 2b are allowed to be efficiently operated. Further, the heating ability of the edge heaters 2a, 2b can be practically improved.
(4) ANOTHER EMBODIMENT
The present invention is not limited to the first to third embodiments and modifications or variations may occur. For example, the thickness of the intermediate leveler portion in the aforementioned first to third embodiments may be modified at will as long as the intermediate leveler portion does not interfere the edge heaters.
In the first to third embodiments, the edge heaters are provided at two sites along the direction of conveyance of the rolled material P, however, the edge heaters may be provided at one site between the entrance leveler portion and the exit leveler portion or may be provided at three sites.
Further, instead of and/or in addition to the intermediate leveler portion 6, 13, 23, an additional intermediate leveler portion 7 may be provided on a plane identical to the conveyance plane F. The intermediate leveler portion 7 cooperates with the entrance leveler portion 4, the exit leveler portion 5 and the intermediate leveler portion 6, 13, 23 (or the entrance leveler portion 4 and the exit leveler portion 5) to enable leveling of the warp amount of the rolled material P from above and beneath. Meanwhile, concrete constitutions such as the shape and the thickness of the intermediate leveler portion 7 can be properly designed. For example, a lateral width (a length in a direction perpendicular to the direction of conveyance of the rolled material P) maybe either identical to the intermediate leveler portion 6 or substantially identical to a lateral width of the rolled material P.
INDUSTRIAL APPLICABILITY
An induction heater device related to the present invention is preferably applied to a hot rolling production line. In accordance with the induction heater device, because a warp of a rolled material as a subject-to-heating material is leveled, 5 a gap of a heater portion in which the rolled material is heated can be narrowed so as to provide heating with high efficiency.
Further, the rolled material is prevented from being in contact with the heater portion, therefore damage and malfunction of the heater portion is prevented. Accordingly, in a case where 10 the present invention is applied to the production line, the present invention contributes to operation with high efficiency and electric power saving.
As compared with the induction heater devices 1, 10 according to the first and second embodiments, an induction heater device 20 in accordance with a third embodiment of the present invention is identical thereto in points of the constitution and the arrangement of the edge heaters and the feeder roller R and, on the other hand, different therefrom in points of concrete constitutions of the entrance leveler portion of the leveler portion. The following description will weigh on differences therefrom. Further, any structure or member identical or similar to the structure or member in the first embodiment will be referred to by an identical reference sign and repeating descriptions will be omitted.
In the induction heater device 20 in accordance with the third embodiment, an entrance leveler portion 21 is, as shown in Fig. 4, substantially a hexadron in which two faces thereof perpendicular to the direction of conveyance of the rolled material P open and side faces along the direction are trapezoid shapes. In more detail, the entrance leveler portion 21 has a broad opening portion 21a opposed to an incoming direction of the rolledmaterial P, and a narrow opening portion 21b provided downstream relative to the broad opening portion 21a in respect to the direction. A bottom face of the entrance leveler portion 21 forms an identical plane to the conveyance plane F. A height of the broad opening portion 21a is set to be substantially identical to the inductor heights of the edge heaters 2a, 2b, and a height of the narrow opening portion 21b is set to be a height to which a height of the warp of the rolled material P
isto belimited. By difference between the broad opening portion 21a and the narrow opening portion 21b, an upper inner face 21c of the entrance leveler portion 21 slopes downward along the direction of conveyance of the rolled material P.
In accordance with the aforementioned constitution, the rolled material P un-coiled from the coil box enters the entrance leveler portion 21 via the broad opening portion 21a before reaching the edge heaters 2a. Subsequently, the rolled material P progresses with having the height of the warp thereof limited along the upper inner face of the entrance leveler portion 21, and goes out of the narrow opening portion 21b of the entrance leveler portion 21.
Subsequently, the rolled material P is capable of passing through the induction heater device 20 with having' the height of the warp limited by the operations of the intermediate leveler portion and the exit leveler portion as described in the first and second embodiments. More specifically, also by the third embodiment, because the height of the warp of the rolled material P can be kept to be an optimum set value or lower, the edge heaters 2a, 2b are allowed to be efficiently operated. Further, the heating ability of the edge heaters 2a, 2b can be practically improved.
(4) ANOTHER EMBODIMENT
The present invention is not limited to the first to third embodiments and modifications or variations may occur. For example, the thickness of the intermediate leveler portion in the aforementioned first to third embodiments may be modified at will as long as the intermediate leveler portion does not interfere the edge heaters.
In the first to third embodiments, the edge heaters are provided at two sites along the direction of conveyance of the rolled material P, however, the edge heaters may be provided at one site between the entrance leveler portion and the exit leveler portion or may be provided at three sites.
Further, instead of and/or in addition to the intermediate leveler portion 6, 13, 23, an additional intermediate leveler portion 7 may be provided on a plane identical to the conveyance plane F. The intermediate leveler portion 7 cooperates with the entrance leveler portion 4, the exit leveler portion 5 and the intermediate leveler portion 6, 13, 23 (or the entrance leveler portion 4 and the exit leveler portion 5) to enable leveling of the warp amount of the rolled material P from above and beneath. Meanwhile, concrete constitutions such as the shape and the thickness of the intermediate leveler portion 7 can be properly designed. For example, a lateral width (a length in a direction perpendicular to the direction of conveyance of the rolled material P) maybe either identical to the intermediate leveler portion 6 or substantially identical to a lateral width of the rolled material P.
INDUSTRIAL APPLICABILITY
An induction heater device related to the present invention is preferably applied to a hot rolling production line. In accordance with the induction heater device, because a warp of a rolled material as a subject-to-heating material is leveled, 5 a gap of a heater portion in which the rolled material is heated can be narrowed so as to provide heating with high efficiency.
Further, the rolled material is prevented from being in contact with the heater portion, therefore damage and malfunction of the heater portion is prevented. Accordingly, in a case where 10 the present invention is applied to the production line, the present invention contributes to operation with high efficiency and electric power saving.
Claims (5)
1. An induction heater device, comprising:
a heater portion having a predetermined gap and being configured to heat a subject-to-heating material in the gap by means of high-frequency induction;
a conveyor portion configured to convey the subject-to-heating material to pass through the gap; and a leveler portion configured to level a warp of the subject-to-heating material so as not to bring the subject-to-heating material into contact with the heater portion;
wherein the leveler portion includes an entrance leveler portion provided at an entrance of the gap which the subject-to-heating material enters, and an exit leveler portion provided at an exit of the gap which the subject-to-heating material exits; and wherein the entrance leveler portion comprises a guiding portion sloping downward relative to a direction of conveyance of the subject-to-heating material, and a leveling face provided in parallel with a plane of conveyance of the subject-to-heating material.
a heater portion having a predetermined gap and being configured to heat a subject-to-heating material in the gap by means of high-frequency induction;
a conveyor portion configured to convey the subject-to-heating material to pass through the gap; and a leveler portion configured to level a warp of the subject-to-heating material so as not to bring the subject-to-heating material into contact with the heater portion;
wherein the leveler portion includes an entrance leveler portion provided at an entrance of the gap which the subject-to-heating material enters, and an exit leveler portion provided at an exit of the gap which the subject-to-heating material exits; and wherein the entrance leveler portion comprises a guiding portion sloping downward relative to a direction of conveyance of the subject-to-heating material, and a leveling face provided in parallel with a plane of conveyance of the subject-to-heating material.
2. An induction heater device as recited in claim 1, wherein the leveler portion further includes an intermediate leveler portion provided in between the entrance leveler portion and the exit leveler portion.
3. The induction heater device as recited in claim 1 or 2, wherein the entrance leveler portion further comprises an adjuster mechanism to make a height of a leveling position at which the entrance leveler portion abuts on the subject-to-heating material variable.
4. The induction heater device as recited in any one of claims 1 to 3, wherein the exit leveler portion further comprises an adjuster mechanism to make a height of a leveling position at which the exit leveler portion abuts on the subject-to-heating material variable.
5. The induction heater device as recited in any one of claims 1 to 4, wherein the entrance leveler portion is a rectangular tube having an exit having a lower height than a height of an entrance which the subject-to-heating material enters, and a sloping portion provided in between the entrance and the exit, configured to level the warp of the subject-to-heating material by means of the sloping portion.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2005-379755 | 2005-12-28 | ||
| JP2005379755A JP2007175755A (en) | 2005-12-28 | 2005-12-28 | Induction heating apparatus |
| PCT/JP2006/323998 WO2007077701A1 (en) | 2005-12-28 | 2006-11-30 | Induction heating device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2633942A1 CA2633942A1 (en) | 2007-07-12 |
| CA2633942C true CA2633942C (en) | 2011-02-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA2633942A Active CA2633942C (en) | 2005-12-28 | 2006-11-30 | Induction heater device |
Country Status (7)
| Country | Link |
|---|---|
| JP (1) | JP2007175755A (en) |
| KR (2) | KR101083914B1 (en) |
| CN (1) | CN101346196B (en) |
| AU (1) | AU2006333894B2 (en) |
| BR (1) | BRPI0621273C8 (en) |
| CA (1) | CA2633942C (en) |
| WO (1) | WO2007077701A1 (en) |
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|---|---|---|---|---|
| DE102013224547A1 (en) | 2013-11-29 | 2015-06-03 | Sms Siemag Ag | Apparatus for increasing the temperature of elongate metallic rolling stock and finishing mill for producing and / or processing elongate metallic rolling stock |
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| CN104174707B (en) * | 2014-07-25 | 2016-04-27 | 南车长江车辆有限公司 | A kind of device and tune squaring method adjusting strong railway freight-car wallboard welding deformation |
| DE102014111501B4 (en) | 2014-08-12 | 2017-10-12 | Thyssenkrupp Ag | Hot-forming device and method for producing press-hardened molded parts from sheet steel |
| CN105698525B (en) * | 2014-11-27 | 2019-07-23 | 宝山钢铁股份有限公司 | Induction Heating Furnace with Split Flat Induction Coils |
| CN110340161B (en) * | 2019-07-25 | 2020-08-28 | 燕山大学 | Heating device, rolling device and rolling method for on-line rolling of thick steel plate |
| CN111167884B (en) * | 2020-01-07 | 2020-12-29 | 燕山大学 | A kind of device and straightening method for straightening medium and heavy plate |
| PL3941157T3 (en) * | 2020-07-15 | 2025-12-22 | Abp Induction Systems Gmbh | Method and system for inductively heating flat articles |
| CN117244967A (en) * | 2023-10-09 | 2023-12-19 | 韶关市成钢金属科技有限公司 | an automatic straightening machine |
| CN119927035B (en) * | 2025-04-02 | 2025-07-25 | 杭州临安三品电子有限公司 | Circuit copper plate shaping device and method |
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| JPS60125B2 (en) * | 1978-07-31 | 1985-01-05 | 新日本製鐵株式会社 | Metal piece end heating device |
| JPH0215822A (en) * | 1988-06-30 | 1990-01-19 | Kawasaki Steel Corp | Straightening apparatus for shape of hot rolled stock |
| JP3646341B2 (en) * | 1995-04-12 | 2005-05-11 | 株式会社明電舎 | Induction heating device |
| JP2981159B2 (en) * | 1995-10-06 | 1999-11-22 | 川崎製鉄株式会社 | Strip plate induction heating device |
| JP3337122B2 (en) * | 1997-10-27 | 2002-10-21 | 川崎製鉄株式会社 | Hot rolling equipment and hot rolling method |
| JPH11319948A (en) * | 1998-05-06 | 1999-11-24 | Kobe Steel Ltd | Apparatus for straightening intermediate rolled stock |
| DE10038292A1 (en) * | 2000-08-05 | 2002-02-14 | Sms Demag Ag | Production of continuously cast slabs comprises using a device having a blooming train, a roller table, a roller table section, a leveling unit, an inductive heating device, a finishing train, a delivery roller table and coiling machines |
| JP2004307962A (en) * | 2003-04-09 | 2004-11-04 | Nippon Steel Corp | Apron and hot rolling equipment provided with it |
| JP2005169454A (en) * | 2003-12-11 | 2005-06-30 | Jfe Steel Kk | Steel strip manufacturing equipment and manufacturing method |
| JP2005232495A (en) * | 2004-02-17 | 2005-09-02 | Jfe Steel Kk | Heat treatment equipment and heat treatment method for metal strip |
| CN100336617C (en) * | 2004-10-25 | 2007-09-12 | 广州珠江钢铁有限责任公司 | Method for using hot-rolled steel plate to produce and steel cylinder by using continuously casting and rolling thin steel blanket |
-
2005
- 2005-12-28 JP JP2005379755A patent/JP2007175755A/en active Pending
-
2006
- 2006-11-30 WO PCT/JP2006/323998 patent/WO2007077701A1/en not_active Ceased
- 2006-11-30 BR BRPI0621273A patent/BRPI0621273C8/en active IP Right Grant
- 2006-11-30 CA CA2633942A patent/CA2633942C/en active Active
- 2006-11-30 KR KR1020087018303A patent/KR101083914B1/en active Active
- 2006-11-30 AU AU2006333894A patent/AU2006333894B2/en active Active
- 2006-11-30 CN CN2006800488127A patent/CN101346196B/en active Active
- 2006-11-30 KR KR1020117018025A patent/KR20110091601A/en not_active Ceased
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102013224547A1 (en) | 2013-11-29 | 2015-06-03 | Sms Siemag Ag | Apparatus for increasing the temperature of elongate metallic rolling stock and finishing mill for producing and / or processing elongate metallic rolling stock |
Also Published As
| Publication number | Publication date |
|---|---|
| BRPI0621273C8 (en) | 2020-06-30 |
| JP2007175755A (en) | 2007-07-12 |
| BRPI0621273B8 (en) | 2020-06-02 |
| CA2633942A1 (en) | 2007-07-12 |
| BRPI0621273A2 (en) | 2011-12-06 |
| CN101346196B (en) | 2010-05-19 |
| AU2006333894B2 (en) | 2010-07-15 |
| WO2007077701A1 (en) | 2007-07-12 |
| KR20080080664A (en) | 2008-09-04 |
| KR20110091601A (en) | 2011-08-11 |
| CN101346196A (en) | 2009-01-14 |
| KR101083914B1 (en) | 2011-11-15 |
| AU2006333894A1 (en) | 2007-07-12 |
| BRPI0621273B1 (en) | 2019-10-22 |
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