JPH03142013A - Coiling method of metallic strip - Google Patents

Abstract

PURPOSE:To reduce the generation of reel marks by making the plane shape of the end part at the beginning of coiling of strip into spire-like and coiling around a reel by making the tip edge into the inclined shape to the coiling direction. CONSTITUTION:The plane shape of the end part S1 of a metallic strip S at the beginning of coiling is made into a spire-like tip part S3 in the one side edge part or both side edge parts S4. This forming can be easily worked with a crop shear or a rotary shear. It is favorable to make the angle theta<=45 deg.. The tip edge S2 is taken as a inclined shape to the coiling direction and coiled with the reel. Because a pressure roll isn't made to run shockingly on the strip, the strip can be coiled without generating reel marks.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a method for winding a metal strip such as a cold-rolled steel plate onto a reel. The present invention relates to a method for winding a metal strip.

[Conventional technology]

Various treatments are carried out in the rolling, annealing, refining, inspection and plating processes of cold-rolled metal strips, surface treated plates, etc. Rewinding and winding are performed.

During winding of the toning belt, glue -/L/ marks are generated as plastic deformation flaws at the overlapped portion with the tip wound around the reel. The tuning part where this reel mark occurred is
During the process of making products into automobiles, home appliances, etc., they are pressed and painted, which causes scratches to appear on the surface and seriously impair the aesthetic appearance, so they are discarded during the processing process.

However, while large reel marks can be visually inspected, small reel marks cannot be detected by just inspecting the belt, and they will show up as flaws after being pressed and painted. Normally, pressing processes, painting processes, etc. are automated and unmanned, making it impossible to perform sufficient inspections during the process, so defects caused by reel marks are discovered during the final product inspection stage and are unlikely to cause major problems. many. Also,
Even in the manufacturing process of copper strips, the final surface inspection is performed on the inspection line before shipment, and then the strips are wound up into strips, so they are shipped with reel marks left on them.

This reel mark occurs because, as shown in FIG. 8, a step portion corresponding to the plate thickness is formed between the winding start end Sl of the steel strip S wound around the reel 1 and the overlapped portion. Since the presser roll 2 rides on the steel strip S with an impact, a large pushing and bending force is applied from the presser roll 2 to the steel strip S, causing bending deformation at the overlapped portion and forming a reel mark.

As a conventional technique for preventing the occurrence of reel marks on the winding belt, as shown in Fig. 9, the cross-sectional shape of the winding start end Sl of the steel strip S is wedge-shaped, and a JP-A-52-54646, in which the formed stepped portion is made smooth so that the presser roll 2 can smoothly ride on the stepped portion, thereby preventing the occurrence of reel marks.
No. 1, JP-A-53-47352, JP-A-55-
Publication No. 89147, Publication of Utility Model Application No. 56-131911,
Utility Model Application No. 58-152315, Utility Model Application No. 62-776
．． The technique disclosed in Publication No. 10, etc., ■ The winding start end S1 of the steel strip S is bent in advance according to the circumferential curvature of the reel 1, and when winding the steel strip S onto the reel, the winding start end S1 is Japanese Patent Laid-Open No. 1989-50020 is designed to prevent the end portion S1 from lifting up from the circumferential surface of the reel 1, thereby reducing the level difference formed at the overlapped portion with the winding start end portion S1.
9-118226, Utility Model Application Laid-Open No. 56-60521, etc., ■As shown in FIG. 10, a soft elastic sleeve 1a is provided on the surface of the reel 1,
Japanese Patent Publication No. 56-25325, Japanese Patent Application Laid-open No. 122658-1982, and Japanese Patent Application Laid-open No. 62-12, in which the winding start end S1 is buried in the inside of the winding part A to prevent a step from being formed in the overlapping part.
The technique disclosed in Publication No. 4025, etc., (1) As shown in FIG.
Japanese Patent Publication No. 54-34870, Japanese Patent Publication No. 54-34871, Japanese Patent Publication No. 54-37, in which the winding start ends S1 are butted against each other to prevent a step from occurring in the overlapping part.
Techniques disclosed in Japanese Patent Publication No. 265, Japanese Patent Publication No. 55-18406, Japanese Patent Publication No. 55-18407, Japanese Patent Publication No. 60-28569, etc., (1) Covering the winding start end S1 with a cushioning material, and thereby preventing the overlapping portion from occurring. JP-A-59-1019 and JP-A-62-279025 which prevent the occurrence of impactful abutment of presser rolls
The technique disclosed in Japanese Utility Model Publication No. 61-1484'09, etc., ■The pressing force of the presser roll 2 is controlled to reduce the impactful impact of the presser roll 2 against the formed step portion. Japanese Patent Publication No. 54-44665, Japanese Patent Application Laid-open No. 144447-1980, and Japanese Patent Application Laid-open No. 1982-134016
Publication No. 181721/1983, Japanese Patent Application Laid-Open No. 1983
-97424, JP-A-58-110123, JP-A-63-188424, JP-A-62-43
There are techniques such as those disclosed in Publication No. 24 and Japanese Utility Model Application Publication No. 57-176115.

[Problem to be solved by the invention]

Among the above-mentioned conventional technologies, the technique (2) can obtain the effect of reducing reel marks, but it requires powerful processing machinery such as a rolling mill or a grinding machine, and also requires
It requires dedicated processing time to process l into a wedge shape,
Furthermore, there is a problem in that the wedge-shaped winding start end S1 is easily bent when the steel strip S is threaded, and the reel mark formed by the bending of the winding start end S1 becomes larger. There is a problem that it is not a fundamental solution and it is not possible to completely eliminate the reel marks.
If the durability of the soft elastic sleeve 1a is not sufficient and poor winding of the steel strip S occurs at an early stage, and the strength of the soft elastic sleeve 1a is increased,
There is a problem in that the winding start end S1 cannot be sufficiently buried and reel marks occur, so the technique (2) aligns the winding start end S1 with the stepped part 1b formed on the reel 1. This requires sophisticated control, expensive control equipment and control time for positioning, and deceleration is required to control this positioning, so the threading speed must be varied. Furthermore, even if alignment is achieved, at the point when winding tension is applied at the beginning of winding,
There is a problem that slippage between the steel strip S and the reel L causes the position to shift, resulting in reel marks, and the technique (2) requires a special device for inserting the cushioning material. At the same time, it is difficult to collect and dispose of the cushioning material, and in order to accurately position and insert the cushioning material, it is necessary to reduce the threading speed, making it difficult to control the threading speed. Yes, and technology (2) can achieve a certain degree of effect by winding in hot rolling, but in cold rolling, it is necessary to increase the winding tension of the steel strip S, so it is difficult to control. There is a problem that it is difficult to achieve this, and that it is difficult to exhibit the effect with the steel strip S having a small plate thickness.

Among the above-mentioned conventional techniques, there is a method that is easy to implement in a cold pressure line, that is, ■ [a method in which the winding start end Sl is shaped into a wedge shape]
, ■ [Method of providing a soft elastic sleeve 1a on the circumferential surface of the reel 1], ■ [Step 1 of the plate thickness gauge of the steel strip S on the circumferential surface of the reel 1]
According to the actual data obtained from factory experiments regarding the method with the
Although the effect of reducing reel marks can be recognized, complete prevention of reel marks has not been achieved.

Therefore, the present invention was devised to solve the problems in the prior art described above. We focused on the fact that it is a line contact, and that the reel mark is formed by the presser roll, which is in line contact with the surface of the copper strip, hitting the overlapping part of the copper strip at the start of winding. The technical challenge was to make the shape of the overlapping part of the copper strip with the end of the winding start so that the presser roll would not run over the roll, thereby safely winding the copper strip without causing reel marks. The purpose is to make it possible to take

[Means to solve the problem]

The means of the present invention for achieving the above object is to change the planar shape of the winding start end of the copper strip so that one side edge or both side edges of the winding start end are pointed tips. The tip edge of the winding start end is formed in a shape that is inclined with respect to the winding direction, and winding is performed on a reel from the winding start end bottomed in such a shape.

The angle of inclination of the leading edge of the winding start end with respect to the winding direction is:
From many experimental results, it is desirable to set the angle to 45° or less.

The width of the side edge forming the tip is determined by the width of the side edge of the belt wrapper that guides the winding of the belt around the reel, but the circumferential surface of the presser roll is not pressurized. It is preferable to set the non-contact value, that is, the width of the center part of the belt excluding both side edges, to a value larger than the pressure contact width of the presser roll against the copper strip.

It is preferable that the planar shape of the tip portion formed on the side edge portion is not a perfect pointed shape but a rounded curved shape or a straight line shape perpendicular to the winding direction.

The tip edge is not limited to a simple inclined linear shape, and for example, the tip portion may be provided on both side edges, and the tip edge may have a substantially V-shaped bottom shape.

[Effect]

The tip edge of the winding start end of the steel strip is inclined with respect to the winding direction, so when the copper strip is wound around the reel, the edge opposite to the tip edge overlaps the winding start end. The overlap line formed by this will also be inclined with respect to the winding direction.

On the other hand, the pressure contact of the pressure roll against the surface of the strip wound on the reel is a line contact along a contact line parallel to the axis of the reel, that is, perpendicular to the winding direction of the copper strip.

In this way, since the contact line of the presser roll and the overlap line of the copper strip are relatively inclined, the presser roll does not run onto the overlapped part shockingly, but gradually rides on it depending on the relative inclination angle. become. Therefore, no shocking pressing down force is applied to the overlapping portion from the presser roll.
Plastic deformation due to the downward force of the presser roll, that is, no reel mark occurs in this overlapping portion.

If the leading edge of the winding start end is inclined at an angle of 45 degrees or less with respect to the running direction of the steel strip, that is, the winding direction, the influence of the downward force acting on the overlapping part from the presser roll becomes almost negligible. It has been experimentally confirmed that no problematic reel marks occur under the copper strip size and winding conditions.

The width of the side edge forming the tip is determined by the width of the side edge of the belt wrapper that guides the winding of the belt around the reel, but the circumferential surface of the presser roll is not pressurized. By setting the value so that there is no contact, the pressing down force from the presser roll will not be applied to the overlapping part facing the tip, and this will prevent local reel marks from occurring in the overlapping part facing the tip. It can be prevented.

By making the planar shape of the tip formed on the side edge of the copper strip into a rounded curved shape or a straight line shape perpendicular to the winding direction, this tip can be made into a perfect pointed shape. The mechanical durability against bending and deformation can be increased compared to the case where the tip is bent and deformed improperly during sheet threading, etc., and the inconvenience of causing a large knot mark. The chances of doing so can be sufficiently reduced.

The tip edge at the beginning of winding is not a simple linear shape,
When formed into a V-shape, the length and width of the winding start end, which is not suitable for commercialization, can be reduced to about half compared to when formed into a simple inclined line shape. This not only improves the yield of the copper strip, but also makes the winding thickness equal on both sides, which is convenient for controlling the winding shape.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows the most basic embodiment of the method of the present invention.
A pointed tip S3 is provided at the tip S2, and the tip edge S2 has an inclination angle of 0 with respect to the winding direction, that is, the running direction of the steel strip S.
°, and the whole is shaped into a straight line.

In contrast to the embodiment illustrated in FIG. 1, the embodiment illustrated in FIG.
This shows the case where the tip edge S2 is formed into a substantially V-shape, and the third
The illustrated embodiment shows one in which the length of the sloped portion is shortened by gradually increasing the slope angle of the tip edge S2.

In the case of the embodiment shown in FIG. 1, the winding start tip si is formed as follows:
This can be easily achieved by shear forming using a crop shear or a rotary shear, and in the case of the embodiment shown in FIGS. 2 and 3, the winding start end S1 can be easily formed using a rotary shear.

FIGS. 4 and 5 are partial plan views showing structural examples of the tip S3. FIG. 4 shows the case where the tip S3 is rounded and shaped into an arc, and FIG. The case where the shape is a straight line is shown. In both embodiments, the tip portion S3 is the side edge portion S.
4, and it is desirable that its shaping is accomplished at the same time as the tip edge S2.

FIG. 6 shows an example of the structure of a press roll 2 suitable for carrying out the method of the present invention. 2a, and reduced diameter portions 2b as both end portions extending from both ends of the main body portion 2a in a shape whose diameter is gradually reduced. The length of the main body portion 2a is smaller than the width of the main body portion of the steel strip S excluding both side edge portions S4, and the presser roll 2 is positioned within the main body portion of the steel strip S of the main body portion 2a. It is arranged with respect to reel l. Therefore, the pressing down force from the press roll 2 does not directly act on the side edge S4 provided with the tip S3.

In the embodiment shown in FIG. 6, the width of the belt wrapper 3 is almost equal to that of the steel strip S, so that the side edge S4 of the steel strip S, that is, the tip S3, is reliably wound around the reel 1. guide you as follows. Therefore, even if the leading edge S2 is inclined with respect to the rotation axis of the reel 1, the winding start end S1 of the steel strip S is guided in the correct posture by the belt wrapper 3, and the winding around the reel 1 Incorrect posture (
The winding can be reliably and safely wound around the reel L without causing the inconvenience of rolling. The overlap line S5 formed by winding the steel strip S around the reel 1 is inclined with respect to the rotational axis of the reel 1, whereas the contact line 2c of the presser roll 2 to the surface of the copper strip S is It is parallel to the rotation axis of the wheel 1 and is inclined with respect to the overlap line S5. Therefore, the action of the presser roll 2 on the overlapping portion of the rope strap S is achieved sequentially from one end of the presser roll 2,
Therefore, the presser roll 2 can ride onto the overlapping portion extremely smoothly without any resistance.

FIG. 7 shows the measurement results of an experimental example in which the occurrence of reel marks was investigated by changing the inclination angle e of the leading edge S2. In this experimental example, the steel strip S has a thickness of 0.8nun and a width of 11
It is a 75mm outer panel material, and the width of the side edge S4 is 50mm.
It was set to mm. The width of belt trapper 3 is 1100mm
The diameter of the winder glue 1 is 508 mm. Curve A shows the case where the inclination angle e is set to 30°, Curve A shows the case where the inclination angle e is set to 45°, and Curve C shows the case where the inclination angle e is set to 60'.

As is clear from the experimental results shown in FIG. 7 and the measurement results of the prior art shown in FIG. 12, the method of the present invention can significantly reduce the amount of reel marks generated. The smaller the inclination angle O is, the more remarkable the effect becomes. However, if the inclination angle is made too small, the length of the incline-processed portion increases and the amount of scrap increases.

This inclination angle e and the width of the side edge S4 described above are determined by the thickness, width, material, and tension of the steel strip S when it is wound onto the reel l.
It is determined empirically in accordance with the winding conditions such as the allowable amount of scrap and the forming capacity of the shear forming machine for the winding start end S1.

[Effects of the Invention] Since the present invention has the above-described configuration, it has the following effects.

Since the presser roll runs over the overlapping part of the toning strips while keeping the downward force acting on the copper strip from the presser roll sufficiently small, the number of reel marks generated can be dramatically reduced. .

The reduction in the pressing force acting on the copper strip from the presser roll is
This is achieved by the inclination of the contact line of the presser roll against the surface of the copper strip and the overlap line, so that the amount of reel marks generated can be reliably and smoothly reduced.

Since it is possible to accurately limit the range in which reel marks occur, post-processes such as pressing can be performed within 2 to 3 degrees of the inner diameter of the coil.
Since the winding can be removed and automated, and the troublesome process for inspecting reel marks can be eliminated, productivity can be improved.

Since there is almost no glue mark formed on the copper strip portion formed into the product, the incidence of defective products can be extremely reduced, and thereby the product yield can be improved.

Copper strips can be wound using conventional methods and equipment, except for shaping the starting end of the strip into a predetermined shape, so it is easy to carry out regardless of whether it is new or existing. , and this implementation can be achieved with high accuracy.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing an example of the configuration of the winding start end of a basic steel strip in which the method of the present invention is carried out. Figures 2 and 3 show other examples of the winding start end of the copper strip. This figure shows the case where the slope of the curve is gradually increased. Figures 4 and 5 show examples of the tip of the winding start end. Figure 4 shows the case where the tip is formed into an arc shape, and Figure 5 shows the case where the tip is formed into a straight line. This shows the case where FIG. 6 shows an embodiment of the method of the present invention, and is an operational explanatory diagram showing the mutual posture and positional relationship of a reel, a steel strip wound around the reel, and a presser roll. FIG. 7 is a characteristic diagram of the method of the present invention showing changes in the state of occurrence of reel marks depending on the angle of inclination. FIG. 8 is an explanatory diagram for explaining the reel mark generation operation. FIG. 9 is an explanatory diagram of a conventional reel mark prevention method in which the leading edge of the winding start end of the tuning band is formed into a wedge shape. FIG. 10 is an explanatory diagram of a conventional glue mark prevention method in which the circumferential surface of the reel is coated with a soft elastic material. FIG. 1I is an explanatory diagram of a conventional method for preventing reel marks in which a step is formed on the circumferential surface of the reel by the thickness of the copper strip. FIG. 12 is a measurement diagram showing actual measurement results of characteristics of each conventional reel mark prevention method. Explanation of symbols 1; Reel, 1a; Soft elastic material, 1b; Step portion, 2: Presser roll, 2a; Main body portion, 2b; Reduced diameter portion, 2c; Contact line, 3; Belt wrapper, S; Metal strip (steel Band) Sl: Winding start end, S2: Tip edge, S3i tip, S4: Side edge, S5: Overlap line, ; Inclination angle. S-1#I'14r 5i--Rokuhan egg -52-Sakiei 53--Sakihana insertion S4-Sakahana camp Abu~f's Ndabj 2cm-Sentakiyo 3-1-be ``ノνTra・'rinee S5--- tre 'I ticket pu 4 wisdom A---yD reply ηυ 工1? Pr1i 77 (ゑ5↓ (layer a stone A inspection) B-1] Input/Fute with kat'A ＼゛shi卆9゛°h9゛5C --- concave ON hand Tekiyasha Twaburu D---Bin person gl thing 10-11 relief J 枦to raw sleeve 1b-11 step stop Sono V Mer 7's l quantity A-1- 7' V Suka O work blade 5 Q \ earth 5 t (- strong messenger 1) B - 11 eyes Rc - $'s entry F 1 1 kimewa ma.
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Claims (3)

[Claims] (1) The planar shape of the winding start end (S1) of the metal strip (S) is changed so that one or both side edges (S4) of the winding start end (S1) are shaped into a pointed shape. The tip end (S3) of the steel strip (S) is made to have a tip edge (S2) inclined with respect to the winding direction.
A method for winding a metal strip onto a reel (1). (2) The metal strip according to claim 1, wherein the planar shape of the tip portion (S3) formed on the side edge portion (S4) is a rounded curved shape or a straight line shape perpendicular to the winding direction. Winding method. (3) The method for winding a metal strip according to claim 1 or 2, wherein the tip portion (S3) is provided on both side edge portions (S4), and the tip edge (S2) is formed into a substantially V-shape.