JPH05123706A - Eging rolling equipment for H-shaped steel and similar shaped steel - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To provide an eccentric web type eccentric sleeve type edging rolling machine applicable to small H-section steel having a relatively small web height. [Structure] Edging rolls (7) provided on the left and right sides of a drive shaft (8), and an eccentric sleeve (10) fitted between the edging rolls (7) so that the position around the drive shaft can be adjusted.
And the outer surface width W of the web restraining ring roll (12) rotatably fitted to the outer peripheral surface of the eccentric sleeve (10) is formed to be larger than the flange piece width F _{S of the section} steel of the rolled material. The web restraint ring roll (12) is integrally formed in the drive shaft direction, and the outer diameter of the eccentric sleeve (10) is formed larger than the outer diameter of the edging roll (7) so that the eccentric sleeve (10) can be rotated around the drive shaft. The eccentric sleeve position setting device (13) for adjusting the position is provided with an eccentric sleeve (1
H), which is provided at the side end of the edging roll (7) side of 0), reduces the roll surface exposed to the rolled material and has a small web height.
It is possible to provide it to shaped steel.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a edging and rolling apparatus for a shaped steel having a flange, and more particularly, it is used in the field of shaping and forging flanges of various sizes for H-shaped steel and similar shaped steel. The present invention relates to a rolling device.

[0002]

2. Description of the Related Art Generally, H-section steel and similar-section steel are rolled by a universal rolling machine. In this method, a break mill 1 shown in FIG. After shaping, the thickness of the web and the flange is reduced by the universal rolling machine 2 having the upper and lower horizontal rolls 2'and the left and right vertical rolls 2 ". Further, the flange width direction is pressed and forged to correct the variation in shape and size. Therefore, the edging rolling mill 3 is arranged continuously with the universal rolling mill 2 as shown in FIG.

According to this rolling method, the thicknesses of the web and the flange can be adjusted within a considerable range, and it is possible to roll sizes having different sectional performances by the same roll. The layout of FIG. 3 is the most typical example, and there may be a case where a plurality of universal rolling mills 2 and edging rolling mills 3 are arranged.

By the way, the rolling condition of the edging rolling mill 3 is basically such that the web portion 4 is basically restrained by a pair of upper and lower horizontal rolls 5 in the initial pass as shown in FIG. In the pass, the flange piece width of the material to be hot-rolled is generally increased as the universal rolling is repeated, so that the clearances S and S'are inevitably generated. Incidentally, when the level of the flange stretch ratio relative to the web stretch ratio is relatively small, the flange piece width may occasionally decrease each time the universal pass is overlapped, contrary to the above example. However, restraint rolling of the web portion cannot be performed, and the clearances S and S'are inevitably generated in the initial pass. Now, this clearance S,
S'is an adjustment allowance for a change in rolling conditions such as a reduction in rolling width and a difference in width expansion due to a change in temperature, a change in steel type, or a difference in product dimension between thick and thin, and further, a modification of a pass schedule for load distribution, It is also indispensable as a roll wear adjustment allowance. In the conventional method, the clearances S and S'cannot be avoided not only in the reverse type multi-pass mill but also in the one-stand one-pass continuous rolling mill, and generally, S, S'≥1 mm are set. Based on such basic conditions of edging rolling, the existing standards of H-section steel, both domestic and international standards, have a constant flange piece width F _S shown in FIG. T _W
The flange width F _T changes with the change of. This is in contradiction with the fact that it is convenient that the full width F _T is constant in each name series in terms of application technology, and it is the current situation that the application field is unreasonable due to technical restrictions in manufacturing.

Further, as shown in FIG. 6, because of the clearances S and S'in the latter pass, the position of the web 4 of the hot-rolled material does not exactly become the center position F _T / 2 of the flange 6, but the so-called center position. Bias (Web Off-center) is likely to occur.

Attempts to build various flange width dimensions by sharing rolls date back to the beginning of the universal rolling method for H-shaped steel, but the hole-roll method is shown in FIG. 8 and the flat-roll method is shown in FIG. As shown in Fig. 9, buckling of the flange or deviation of the center is caused, and as shown in Fig. 10, an attempt is also made to prevent the buckling and center deviation by using an auxiliary guide device (G) together. However, it has been difficult to maintain a stable and good rolling state in any of them, and each edging roll has been used for the production of each designated series.

Therefore, in order to solve the above-mentioned drawbacks, the applicant of the present invention first discloses Japanese Patent Laid-Open No. 62-77107 (see FIG. 1).
In 1), there is provided a rolling apparatus having an online stepless step of adjusting the width of the flange without changing the roll tool, that is, a function of adjusting the groove depth Ki of the edging rolling roll. The gist of the invention of this prior application is that, when the material to be hot-rolled is an H-shaped steel, there are a pair of split-type edging rolls 7 for rolling and shaping and forging the flange tip, and each edging roll 7 is driven. The shaft 8 is rotatably supported by the drive shaft 8 such that the axial distance between the drive shaft 8 and the drive shaft 8 is adjustable. An eccentric ring 10 is rotatably mounted on the outer circumference of each edging roll 7 via a bearing 9, and a web restraint ring roll for guiding the hot-rolled material to a proper rolling position and restraining the web. 12 is concentrically mounted on the outer periphery of the eccentric ring 10 via a bearing 11 so as to be rotatable. That is, while the edging roll 7 is forcibly driven integrally with the drive shaft 8,
The web restraint ring roll 12 is rotatable regardless of the rotation of the edging roll 7 and is not driven. The eccentric ring 10 is fixed to the eccentric ring 10 after being rotated by the eccentric sleeve position setting device 13 to an appropriate position according to the rolling condition, that is, the desired flange piece width dimension F _S.

Thus, the relative distance between the restraining surface of the web corresponding to the flange strip width F _S of the hot-rolled material shown in FIG. 7 and the edging surface at the tip of the flange (hereinafter referred to as the roll flange strip width) is stepless. Since it can be changed to, it is possible to create the entire flange width of the product steplessly. Also,
Edging roll 7 for the flange tip of the hot rolled material
The web restraint ring roll 12 for restraining the web surface of the hot-rolled material during rolling is rotated only when the circumferential surface of the roll comes into contact with the hot-rolled material, regardless of the peripheral speed of the edging roll 7. To do. Therefore, scratches on the surface of the hot-rolled material or warpage in the vertical direction of the hot-rolled material due to the difference in peripheral speed between the edging roll 7 and the web restraining ring roll 12 do not occur, and the roll is not worn or seized. It became possible to prevent. Furthermore, since the edging roll 7 and the web restraint ring roll 12 are divided into two parts so that the distance between them can be adjusted in the drive axis direction, they can be shared by a plurality of sizes depending on the web height of the H-section steel, and the space between the left and right rolls can be adjusted. Has a practical effect in that it can be utilized as a storage place for other mechanisms in addition to interposing the mechanism of the eccentric sleeve position setting device 13.

However, when the structure described as the embodiment is adopted in the invention of this prior application, the sliding portion a between the web restraining ring roll 12 and the eccentric ring 10 and the sliding between the eccentric ring 10 and the edging roll 7 are adopted. When the moving part b faces the inside of the flange of the hot-rolled material, and the scale, cooling water or dust enters the slight gap between the sliding parts a and b, the web restraint ring roll 12 and the eccentric ring 10
It may happen that the smooth rotation of the.

In order to solve the above problems, the applicant of the present invention is further excellent in the invention described in Japanese Patent Application No. 2-71162 (see FIGS. 12 and 13 attached), that is, the sealing property. Provided roll structure. The gist of the invention of the prior application is that the edging rolls 7 provided on the left and right in the axial direction of the drive shaft 8 and the drive shaft 8 between the two edging rolls 7 are mounted via a bearing 9 so that the position around the drive shaft can be adjusted. Eccentric sleeve 10, and edging of H-section steel and similar section steel concentrically with the eccentric sleeve 10 and a web restraint ring roll 12 rotatably fitted to the outer peripheral surface of the eccentric sleeve 10 via a bearing 11. In the rolling apparatus, the outside surface width W of the web restraint ring roll 12 is formed to be larger than the flange piece width F _S of the shape steel of the hot rolled material, and corresponds to the inside of the flange tip of the hot rolled material steel. The outer side surface of the web restraint ring roll 12 is formed into an internal constriction shape, and the inner side surface 7a of the edging roll 7, the outer peripheral corner portion 10a of the eccentric sleeve 10 and the inner peripheral corner of the web restraint ring roll 12 are formed. Part 12a is characterized by being configured so as to contact with each other through a seal member 14.

By this means, it is possible to prevent scale, cooling water or dust from entering through the gaps between the roll members under the severe conditions of hot rolling, improve the operation stability and life of the device, and maintain and maintain the device. The inspection work was greatly simplified. However, because of its structure, the web restraint ring roll 12 is divided into two parts in the drive axis direction, and the rolling load of the hot-rolled steel strip,
In particular, there is a problem that it is not possible to sufficiently cope with a shaped steel having a small web height due to the strength constraint of the web restraint ring roll 12 and the bearings 10 and 11 against the rolling load in the drive axis direction.

[0012]

DISCLOSURE OF THE INVENTION In the present invention, the applicant of the present invention first discloses Japanese Patent Application Laid-Open No. 62-77107 and Japanese Patent Application No. 2-711.
No. 62 and the feature of the invention proposed in the specification, namely, in the edging rolling in the universal rolling method of a shaped steel having a flange such as an H-shaped steel, the flange piece width dimension is continuously changed on-line to make the edging roll. It is possible to provide products without scratches on the surface of the hot-rolled material due to the difference in peripheral speed and warpage of the hot-rolled material in the vertical direction, and it is possible to improve the durability and maintainability of the roll and improve the product shape. In addition to the advantages such as the above, it is an object of the present invention to provide an edging rolling apparatus that can be sufficiently applied to a section steel having a flange such as an H-section steel having a narrower web width.

[0013]

1 (a) and 1 (b) show the structure of the device of the present invention, and FIG. 2 shows a partially enlarged view of the roll bite vicinity of FIG. 1 (a). The above-mentioned prior art JP-A-62-77107 (FIG. 11) and Japanese Patent Application No. 2-7.
The same components as those in the specification of No. 1162 (configurations shown in FIGS. 12 and 13) are designated by the same reference numerals, and detailed description thereof will be omitted. A left-right split type edging roll 7 is forcibly rotatably supported on the upper and lower drive shafts 8. The drive shaft 8 between the left and right edging rolls 7
An eccentric sleeve 10 is rotatably fitted in the bearing via a bearing 9. The eccentric sleeve position setting device 13 adjusts the position of the eccentric sleeve 10. Eccentric sleeve 1
0 around the outer circumference of the bearing 11 concentrically with the eccentric sleeve 10.
The web restraint ring roll 12 is rotatably fitted through the roller. A seal member 14 is enclosed at a position where the inner side surface 7a of the edging roll 7, the outer peripheral corner portion 10a of the eccentric sleeve 10 and the inner peripheral corner portion 12a of the web restraining ring roll 12 are in contact with each other. The seal member 15 is also enclosed in the sliding portion between the drive shaft 8 and the inner peripheral surface of the end portion of the eccentric sleeve 10. The outside surface width W of the web restraint ring roll 12 is formed to be larger than the flange piece width F _S of the flange 6 of the hot-rolled material steel. The above-mentioned main structure is disclosed in JP-A-62 / 62.
-77107 and the eccentric sleeve type edging roll of the invention described in Japanese Patent Application No. 2-71162, but the difference is that the web restraining ring roll 1 is different from the conventional means.
While the eccentric sleeve position setting device 13 is divided into two parts in the drive axis direction by inserting the eccentric sleeve position setting device 13 into the gap, in the present invention, the web restraint ring roll 12 is integrally formed in the drive axis direction and the eccentric sleeve 10 is provided. An eccentric sleeve position setting device 13 for adjusting the position of the eccentric sleeve 10 around the drive shaft is provided at the side end of the eccentric sleeve 10 on the edging roll 7 side, the outer diameter being formed larger than the outer diameter of the edging roll 7.
This is because the edging roll 7 and the web restraint ring roll 12 are the only surfaces exposed to the hot-rolled material steel.

A feature of the present invention is that the size and shape of the flange of the hot rolled steel and the size and shape of the web restraint ring roll 12 with respect to the edging roll 7 are specified and then integrated into the drive shaft direction. Yes, and will be described in more detail below.

In FIG. 1, an eccentric sleeve position setting device 13 is installed on the side end surface portion of the eccentric sleeve 10 within a range where it does not interfere with the edging roll 7. In this embodiment, a semi-arcuate rack 13a is arranged on the side end surface of the eccentric sleeve 10 around the axis of the drive shaft 8, and a pinion gear 13b that engages with the rack 13a is driven by an eccentric sleeve drive motor 13c. The eccentric sleeve 10 is rotationally driven to a required angle and then fixedly held. Regarding the rotation angle of the eccentric sleeve 10, the rotation limit control of the eccentric sleeve drive motor 13c is performed so that the surface exposed to the hot-rolled material steel remains within the range of only the edging roll 7 and the web restraint ring roll 12. The eccentric sleeve position setting device 13
In addition to this method, for example, a lever arm method or a hydraulic cylinder method may be adopted.

FIG. 2 is an enlarged view of the main part of FIG. 1, where the inner side surface 7a of the edging roll 7, the outer peripheral corner portion 10a of the eccentric sleeve 10 and the inner peripheral corner portion 12a of the web restraining ring roll 12 are in contact with each other. A seal member 14 is enclosed in the. The seal member 15 is also enclosed in the sliding portion between the drive shaft 8 and the inner peripheral surface of the end portion of the eccentric sleeve 10. The outside surface width W of the web restraint ring roll 12 is formed to be larger than the flange piece width F _S of the flange 6 of the hot-rolled material steel.
That is, in the present invention, as in the invention of Japanese Patent Application No. 2-71162, it is avoided that the sliding portion between the inner peripheral surface of the web restraint ring roll 12 and the eccentric sleeve 10 is located inside the flange 6. Also, the outer surface 1 of the web restraint ring roll
A predetermined width P corresponding to the base of the flange 6 of 2b is chamfered along the flange inclination angle θ so as to abut the inner side surface of the flange 6 of the shaped steel. On the other hand, the outer surface of the web restraint ring roll 12 corresponding to the inner side of the front end of the flange 6 is formed in a constricted shape. As a result, a space Q is formed in a portion surrounded by the inside of the tip of the flange 6, the outer peripheral corner 12a of the edging roll 7 and the inner constricted side of the web restraining ring roll 12.

[0017]

[Operations and Examples] After adjusting the position of the eccentric sleeve 10 corresponding to the flange width F _S of the hot-rolled shaped steel, edging rolling is started in a fixed holding state, and the edging roll 7
Thus, the end portion of the flange 6 is forcibly bitten, and the web restraint ring roll 12 freely rotates due to contact with the inner surface or the web surface of the flange 6. The gap on the roll side corresponding to the flange 6 of the shaped steel is one place only between the inner side surface 7a of the edging roll 7 and the outer side surface of the web restraining ring roll 12, and scale, cooling water or dust enters the gap. The possibility of doing so, including the intervening effect of the seal member 14,
Less. Further, since the bearings 9 and 11 are separated from the rolled material, the precision mechanism portion is also thermally protected. Further, since the outer side surface of the web restraint ring roll 12 is formed in a constricted shape, when the tip end portion of the flange 6 is edging-rolled, the metal flow has an appropriate amount in the outer end portion of the flange tip and the space portion Q in the inward direction. It becomes a bulge and protrudes. The structure of this edging rolling device is disclosed in Japanese Patent Laid-Open No. 62-
Although it is similar to the invention described in Japanese Patent Application No. 77107 and Japanese Patent Application No. 2-71162, the device of the present invention has the following effects based on the structural difference.

[0018]

According to the conventional method, since the web restraint ring roll 12 is divided into two parts on the right and left sides, the height of the web is increased when the eccentric sleeve type edging rolling device is applied to the H-section steel because of the problem of strength. Is relatively large (eg 400
(mm or more) size is preferable. In the present invention, since the web restraint ring rolls 12 are integrally formed on the left and right sides, there is no problem in strength, and the web height is small.
The eccentric sleeve type edging rolling device can now be easily applied to shaped steel. In particular, when trying to restrain the width of the H-section steel in the web width direction or to restrain the rolling of the fillet part in order to stabilize the shape and rolling, a force in the thrust direction is generated in the roll, so that the conventional two-division roll has a trouble of damage. However, since the left and right thrust forces are automatically absorbed in the integrated roll of the present invention, there is no need to worry about such a problem. Moreover, since the entire web surface can be flattened, the web portion can be pressed down if necessary. When the web portion is pressed, the bulging of the flange tip portion can be alleviated by the stretching action of the entire material. Although rolling load increases when a reduction is applied to the web portion, there is no problem in the integrated roll because the pressure receiving width of the bearing increases and the allowable load can be increased.

In the edging rolling apparatus of the present invention, the roll diameter can be changed on-line in accordance with the flange piece width F _S of the hot-rolled shaped steel, and one set of rolls can be used for various shaped steels. What can be done, it is possible to prevent the occurrence of defects due to the peripheral speed difference between the edging roll 7 and the web restraint ring roll 12, between the roll members under the severe conditions of hot rolling (normal rolling temperature is 700 to 1100 ° C). Can prevent the ingress of scale, cooling water or dust from the gap of
Needless to say, the operation stability of the device and the maintenance and inspection work of the device can be greatly simplified.

[Brief description of drawings]

1A and 1B are overall configuration diagrams of an edging roll according to an embodiment of the present invention, in which FIG.
(B) is a schematic cross-sectional side view in the direction of arrow AA in FIG.

FIG. 2 is a partially enlarged explanatory diagram of FIG.

3 (a), (b), (c) and (d) are conventional examples of a method for rolling H-section steel.

FIG. 4 is a configuration diagram of a universal mill and an edging mill.

FIG. 5 is a conceptual diagram of an edging rolling state in an initial pass.

FIG. 6 is a conceptual diagram showing a conventional state of late pass edging rolling.

FIG. 7 is a flange related dimension explanatory diagram of H-section steel.

FIGS. 8A and 8B are explanatory views of a defective edging rolling condition by the conventional hole-rolling method.

9 (a) and 9 (b) are explanatory views of a defective edging rolling condition by the flat roll method in the conventional method.

10 (a) and 10 (b) are explanatory views of a defective edging rolling state in which an auxiliary guide device is also used.

11 (a), (b) and (c) are overall configuration diagrams of a conventional eccentric sleeve type edging device.

12A and 12B are overall configuration diagrams of another conventional eccentric sleeve type edging device.

FIG. 13 is a partially enlarged explanatory diagram of FIG.

[Explanation of symbols]

 1 Breakdown Mill 2 Universal Rolling Mill S, S'Clearance 3 Edging Rolling Mill 4 Web 5 Horizontal Roll 6 Flange 7 Edging Roll 8 Drive Shaft 9 Bearing 10 Eccentric Sleeve 11 Bearing 12 Web Restraint Ring Roll 13 Eccentric Sleeve Positioning Device 13a Rack 13b Pinion gear 13c Eccentric sleeve drive motor 14 Seal member 15 Seal member

Claims (1)

[Claims] 1. An eccentric sleeve (10) fitted to a drive shaft (8) through a bearing (9) so that the position around the drive shaft can be adjusted.
A web restraint ring roll (12) is rotatably fitted to the outer peripheral surface of the eccentric sleeve (10) via a bearing (11) concentrically with the eccentric sleeve (10). An edging rolling apparatus for H-section steel and similar section steel in which edging rolls (7) are fixed to the drive shafts (8) on the left and right sides of 12), and the outer surface width W of the web restraint ring rolls (12) is covered. The eccentric sleeve (10) has an outer diameter that is larger than the flange piece width F _S of the shape steel of the hot rolled material, and the edging roll (7).
Of the H-section steel and similar section steel, characterized in that the eccentric sleeve position setting device (13) is formed at a side end of the eccentric sleeve (10) on the edging roll (7) side. Edging rolling equipment.