KR20210084684A - Metal strip material, slitting method, and measuring method for strip material meandering - Google Patents

Abstract

A band-shaped metal material having a high degree of parallelism after slitting and a slit method for obtaining such a band-shaped metal material are provided, and a method for rationally measuring the meandering of the band-shaped material is provided. When a straightedge is placed on the side surface of the strip-shaped metal material in the longitudinal direction and the gap between the straightedge and the strip-shaped metal material in a direction perpendicular to the longitudinal direction is measured every 50 mm in length, the maximum value of the gap per 1 m in the longitudinal direction of the strip-shaped metal material is 0.12 mm or less. A band-shaped metal material and a slit method, and a method for measuring meandering of the band-shaped material, characterized in that.

Description

Band-like metal material, slit method, and meander measurement method of strip-like material {METAL STRIP MATERIAL, SLITTING METHOD, AND MEASURING METHOD FOR STRIP MATERIAL MEANDERING}

The present invention relates to a belt-shaped metal material, a slit method for continuously cutting a metal material to a predetermined width along a longitudinal direction to obtain a belt-shaped metal material, and a method for measuring meandering of the belt-shaped material.

In the production line of metal materials such as mild steel, copper, copper alloy, stainless steel, etc., the metal material is conveyed in the longitudinal direction to the final sheet thickness in the rolling process, and then divided into slits into a predetermined band width according to the user's request, Each coil is wound and shipped. As a method of slitting a metal material to a predetermined width, a method of passing the metal material through a slitter provided with a round-blade cutter arranged vertically is conventionally performed.

If the shape of the metal material before slitting is not flat but curved, both side edges of the strip-shaped metal material after slitting do not become parallel and straight lines, resulting in a curved shape as shown in FIG. 2 . A shape having such a bend is not suitable for applications requiring strict dimensional accuracy. For example, when shape processing a lead frame by etching from a strip|belt-shaped metal material, if the bending is large, the piercing by the pressing process at regular intervals will become difficult, and the product yield will fall remarkably.

As a method of preventing bending, before a metal material passes through a slitter, the method of press-contacting the guide rollers lined up linearly from both sides of a metal material in a conveyance direction is known (for example, patent document 1).

In addition, in Patent Document 2, an unwinding rotation device for sending out a copper strip plate, a plurality of upper disk cutters and a lower disk cutter that shears the copper strip plate to such an extent that it is not completely separated in the thickness direction, and the shearing process is performed A slitting device for cutting the copper strip in the longitudinal direction, comprising: a pressing roll for completely separating and cutting the copper strip by pressing it in the thickness direction; and a winding rotation device for winding the separated and cut thin copper strip, wherein the slitting device cuts the copper strip in the longitudinal direction, the upper disc cutter and a partially tapered blade tip comprising a flat portion having a contact angle of 0° with the lower disk cutter and an inclined portion having an angle of 5 to 30° with a copper strip plate formed on the extension line of the flat portion. A slitting apparatus is described, and as a secondary effect of this invention, the amount of bending of the slitted thin copper strip plate is also reduced.

Here, the measurement of the amount of bending is usually measured in accordance with JIS H 3100 (2012), and specifically, as shown in FIG. 2 , the depth of the arc with respect to the reference length of 1000 mm at any location.

Japanese Patent Laid-Open No. 10-109217 Japanese Patent Laid-Open No. 2013-237116

However, by the said means, the subject that the product yield in a press process falls still has not reached to completely solve the subject. Moreover, even if the present inventors made low the amount of bending measured by the said JIS standard, it discovered that the subject of the defect in a press process may not be solved.

And, as a result of intensive studies by the present inventors, when a metal material is continuously cut to a predetermined width along the longitudinal direction to obtain a band-shaped metal material, fine vibrations in the width direction and the vertical direction occur, thereby causing the belt-shaped metal material to have a minute cycle. found wandering. The meandering of such a minute cycle (hereinafter referred to as "minor meandering bending") may not be detected according to the above JIS standards, and as a result, even if the amount of bending measured according to the above JIS standards is small, the pressing process A suitable band-shaped metal material may not be obtained.

Therefore, a belt-like metal material with high parallelism in which such micro meandering is suppressed, and a slit method for obtaining such a belt-like metal material are required. In addition to the above JIS standards, a rational measurement method that reflects the minute meandering bending caused by minute vibrations at the time of the slit is required.

That is, a strip|belt-shaped metal material has both the bending amount measured by JIS standard, and micro meandering bending|flexion. Therefore, even if it is possible to manufacture a thing with the amount of curvature measured by JIS standard being zero, a micro meandering bend does not become zero.

This is because the cause system of generation|occurrence|production is different from the amount of curvature measured by JIS standard, and a micro meandering curve. That is, generation|occurrence|production of the curvature measured by JIS standard originates in the shape of the raw material in front of a slit. And the shape of the raw material before a slit is influenced by the finish cold rolling process, the shape correction process after the finish rolling process, or the strain relief annealing process. On the other hand, the occurrence of micro meandering is due to the slitter equipment and the slit method as described above.

Therefore, an object of the present invention is to provide a band-like metal material having a high degree of parallelism after slitting, and a slit method to obtain such a band-like metal material, and to provide a method for rationally measuring the micro meandering curvature of the band-like material.

The present invention includes the following aspects.

(1) When a straightedge is placed on the side surface of the strip-shaped metal material in the longitudinal direction and the gap between the straightedge and the strip-shaped metal material in a direction perpendicular to the longitudinal direction is measured for every 50 mm in length, the maximum value of the gap per 1 m in the longitudinal direction of the strip-shaped metal material is A band-shaped metal material having a thickness of 0.12 mm or less.

(2) The band-shaped metal material according to (1), wherein the amount of bending per 1 m in the longitudinal direction is 0.03 mm or less.

(3) The band-shaped metal material according to (1) or (2), wherein the band-shaped metal material is a band-shaped metal material of copper or a copper alloy.

(4) a method of slitting a metal material to a predetermined width while conveying it in the longitudinal direction,

A pair of round-blade cutters for cutting the margin area on both sides of the metal material conveyed in the longitudinal direction, and a pair of round-blade cutters disposed inside each of the two pairs of round-blade cutters, for cutting the metal material to a predetermined width A method comprising performing a slitting step of slitting a metal material to a predetermined band width using a slitter having at least a pair of round blade cutters, and the following steps (i) to (iii).

(i) Before the slit process, the movement of the metal material conveyed in the longitudinal direction from the position of the round blade cutter to the position at least one times the width of the metal material WHEREIN: Regulatory process.

(ii) A step of regulating the movement of the metal material conveyed in the longitudinal direction from the position of the round blade cutter to a position at least one times the width of the metal material from the front and back directions before the slit step.

(iii) after the slit step, the step of regulating the movement of the slit metal material from the front and back directions at at least one position in the region from the position of the round blade cutter to the position three times the width of the metal material .

(5) The method as described in (4) which further includes the process of leveler-correcting a metal material before implementing the process of regulating the movement of the metal material conveyed in the longitudinal direction from both sides and the front-back direction.

(6) A method for measuring the meandering of a belt-like material, which is characterized by measuring the gap in a direction perpendicular to the longitudinal direction of the straightener and the belt-like material for each pitch of a certain length by applying a straightedge to the side of the strip cut to a certain length in the longitudinal direction How to measure meander.

(7) The meander measuring method according to (6), wherein the pitch is 1/10 or less of the length of the strip.

ADVANTAGE OF THE INVENTION According to this invention, the belt-like metal material with high parallelism with meandering suppressed can be obtained, and the defect in the said press process can be suppressed effectively.

BRIEF DESCRIPTION OF THE DRAWINGS It is a schematic diagram which shows the state in which a strip|belt-shaped metal material is meandering.
It is a figure which shows the measuring method of the bending amount in JIS H 3100 (2012).
It is a schematic diagram which shows the structure of the slitter installation which concerns on one Embodiment of this invention.
4 is a diagram showing a method for measuring a meandering of a band-like material according to an embodiment of the present invention.

(belt-shaped metal materials)

Although there is no restriction|limiting in particular as a kind of strip|belt-shaped metal material, For example, mild steel, copper, a copper alloy, stainless steel, etc. are mentioned.

Here, when a straightedge is placed on the side surface of the strip-shaped metal material in the longitudinal direction and the gap between the straightedge and the strip-shaped metal material in a direction perpendicular to the longitudinal direction is measured every 50 mm in length, the maximum value of the gap per 1 m in the longitudinal direction of the strip-shaped metal material is 0.12. It is essential that it is less than mm.

As described above, when a metal material is continuously cut to a predetermined width along the longitudinal direction to obtain a band-shaped metal material, fine vibrations in the width direction and the vertical direction occur, thereby causing the belt-shaped metal material to meander. Since the meandering generated from such fine vibrations cannot necessarily appear as bending of the band-like metal material, it may not be possible to accurately measure the amount of bending according to JIS H 3100 (2012). In order to accurately evaluate such meandering, it is necessary to increase the measurement points from the method in JIS H 3100 (2012). Therefore, in the present invention, when a straightedge is placed on the side surface of the strip-shaped metal material in the longitudinal direction and the gap between the straightedge and the strip-shaped metal material in a direction perpendicular to the longitudinal direction is measured every 50 mm in length, the gap per 1 m in the longitudinal direction of the strip-shaped metal material. The maximum value of is set to be 0.12 mm or less. Thereby, the value of the gap can be obtained from a number of measurement points, and the meandering which arises from minute vibration can be reflected accurately. As a result, it is possible to reliably provide a strip-shaped metal material suitable for a subsequent press process or the like.

The detail of the method of measuring the maximum value of the said clearance gap is mentioned later.

Moreover, it is preferable that it is a strip|belt-shaped metal material whose bending amount per 1 m of longitudinal direction is 0.03 mm or less while the said condition is satisfy|filled. Such a bending amount is a value obtained by the measuring method of the bending amount in JIS H 3100 (2012). Thereby, the quality of a strip|belt-shaped metal material can be ensured more reliably.

It can be said that it has the intensity|strength required as a raw material of an electrical and electronic component that the tensile strength of a strip|belt-shaped metal material is 600 MPa or more. Since processing may become difficult when tensile strength exceeds 950 Mpa, 950 Mpa or less is preferable. Moreover, it is preferable that the Vickers hardness of a band-shaped metal material shall be 180-300 from a viewpoint of similarly making intensity|strength and workability compatible.

Next, the slitter installation and the slit method of this invention are demonstrated, referring drawings. 3 is a schematic diagram showing the configuration of the slitter facility 100 according to the present embodiment. The long metal material 200 unwound from a payoff reel (not shown) is slitted and divided into a desired band width in the slitter 130 while being conveyed in the longitudinal direction. After division, the metal material 200 may be wound in a coil shape by a tension reel (not shown), respectively. Although not shown, the metal material 200 may be loosened in a loop shape at the front and rear ends of the slitter facility 100 . Thereby, adjustment of the conveyance speed of the metal raw material 200 becomes easy.

Although there is no restriction|limiting in particular as a kind of metal material 200 to slit, For example, mild steel, copper, a copper alloy, stainless steel, etc. are mentioned. Before the metal material 200 enters the slitter 130, it is preferable in terms of obtaining the metal material 200 having a high degree of parallelism after the slit to be leveler-corrected by a leveler roll or the like to increase the flatness. The thickness of the metal material is preferably 0.10 to 0.16 mm. If the thickness is less than 0.10 mm, the strength is low, and it is difficult to use the metal alone, so that bonding with a resin or the like is required. When it exceeds 0.16 mm, it is necessary to set a bending radius large in bending process, and it is unsuitable for downsizing of an electrical and electronic component. Moreover, it is preferable to set the width|variety of the strip|belt-shaped metal material after a slit to 100-200 mm. If it is less than 100 mm, productivity is inferior, and if it exceeds 200 mm, it becomes difficult to perform press working with stable quality in all width|variety.

(guide roller)

At the front end of the slitter 130 , guide rollers 120 are provided on both sides of the metal material 200 being conveyed. The guide roller 120 is a device for preventing meandering by regulating the plate direction of the metal material 200 from both sides. When the metal material 200 being conveyed starts to meander, the side surface of the metal material 200 abuts against the side surface of the guide roller 120 to prevent the meandering and correct it in a predetermined plate direction. Since the rotation axis of the guide roller 120 is parallel to the front and back directions of the metal material 200 , the rotation direction of the guide roller when the metal material 200 comes into contact with the guide roller 120 is the metal material 200 . coincides with the plate direction. Thereby, it becomes possible to reduce the friction between the metal material 200 and the guide roller 120 . In order to secure the effect of preventing meandering, the guide roller 120 needs to be disposed in a region from the position of the round blade cutter of the slitter to be described later to the position of at least one time the width of the metal material. In order to increase the effect of preventing meandering, it is preferable that a plurality of guide rollers 120 are arranged in a straight line on each side. In addition, it is preferable that the guide rollers 120 are installed in pairs on opposite sides of the metal material 200 .

(Anti-warp plate at the front of the slitter)

However, the meander prevention effect is limited only by the installation of the guide roller 120 , and thus the meandering cannot be prevented in a high dimension. In addition, since the movement in the vertical direction is not regulated by the guide roller 120 alone, the metal material 200 may be bent or the metal material 200 may sit on the guide roller 120 . Therefore, it is effective to install a pair of meandering prevention plates 110a and 110b at the front end of the slitter 130 for pressing the metal material 200 from the top and bottom as further meander prevention means. From the viewpoint of preventing meandering, preventing bending, and preventing sitting on the guide roller 120, it is preferable that the length range in the plate direction in which the guide roller 120 and the meandering prevention plates 110a and 110b are installed at least partially overlap. Do. The upper meandering prevention plate 110a can be loaded by laying the lower meandering prevention plate 110b on an appropriate foundation or floor, and sandwiching the metal material 200 being conveyed thereon. By installing additional meandering prevention plates 110a and 110b on the guide roller 120, meandering, bending, and sitting on the guide roller of the metal material 200 are suppressed, so that the raw material enters the slit process in a flatter state. it becomes possible to do In order to secure the meander prevention effect, the meander prevention plates 110a and 110b need to be arranged in a region from the position of a round blade cutter of a slitter to be described later to a position at least one times the width of the metal material.

A sheet made of a material having low frictional resistance, such as a commercially available nonwoven fabric, so that the surface of the meander prevention plates 110a and 110b in contact with the metal material 200 does not scratch the metal material 200 and does not increase the conveyance resistance. It is preferable to affix The pressing force on the metal material 200 from the meandering preventing plates 110a and 110b may be appropriately set in balance with the meandering preventing effect, but the degree of self-weight when the meandering preventing plates 110a and 110b is a veneer is sufficient. effect is obtained. In the case where the effect of preventing meandering is insufficient with the self-weight of the anti-skeep plate, a weight may be further placed on the anti-sweep plate.

The width of the meander prevention plates 110a and 110b is greater than or equal to the width of the metal material 200, and the installation so as to press the metal material 200 over the entire width direction of the metal material 200 is effective for preventing meandering. It is preferable from a viewpoint of a height. What is necessary is just to set the length in the plate-threading direction of the meandering prevention plates 110a, 110b suitably in balance with the meandering prevention effect. The upper and lower meandering prevention plates 110a and 110b may each be configured by one sheet, or may be configured by arranging a plurality of sheets in the conveying direction. Specifically, it is preferable that the length in the plate-threading direction of the meandering prevention boards 110a, 110b sets it as 500-800 mm.

(slitter)

Referring to FIG. 3 , the slitter 130 includes, in one embodiment, two pairs of upper and lower round blade cutters for cutting margin areas on both sides of the metal material conveyed in the longitudinal direction, and the two pairs of round blade cutters. It may have at least a pair of upper and lower round blade cutters disposed inside each of the blade cutters and for cutting the metal material to a predetermined width.

(Anti-warp plate at the rear end of the slitter)

In order to remarkably increase the parallelism of the metal material 200 after the slit, it is effective to provide the meandering prevention plates 140a, 140b, 160a, 160b, 170a, 170b also at the rear end of the slitter 130 . By preventing the meandering of the metal material 200 after the slit, it is possible to prevent the metal material 200 after the slit from overlapping, and to prevent the meandering of the metal material 200 after the slit is to prevent the metal material 200 before the slit and in the slit. ) also contributes to the prevention of meandering. In order to secure the effect of preventing meandering, the anti-swept plates 140a, 140b, 160a, 160b, 170a, and 170b are to be placed in the area from the position of the round blade cutter of the slitter to a position more than three times the width of the metal material There is a need. When the meander prevention effect is insufficient with the self-weight of the meandering prevention plate 140a, 140b, 160a, 160b, 170a, 170b, a weight 150 may be further mounted on the meandering prevention plate. Preferred aspects of the meandering prevention plates 140a, 140b, 160a, 160b, 170a, and 170b are the same as those of the meandering prevention plates 110a and 110b of the front end of the slitter 130, and thus description thereof will be omitted.

Next, the meandering measuring method of the band-like material of this invention is demonstrated. In measuring the meandering of the band material, a straightedge is placed on the side of the band material cut to a certain length in the longitudinal direction, and the gap between the straightedge and the straight line in a direction perpendicular to the longitudinal direction of the band material is measured for each pitch of a certain length. Thereby, the meandering generated by the fine vibration at the time of a slit can be reflected effectively in a measurement result. For example, by setting the pitch to a length of 1/10 or less of the length of the strip, measuring 10 or more points, the maximum value of the obtained value is the index value of the meandering, and the maximum value is less than a certain index. have.

For example, as shown in Fig. 4, a measuring table 203 having a plane for mounting the band-like material 250, and a plurality of measuring holes 210 provided on the plane at predetermined pitches along the measuring direction. ), a reference straightener 204 is placed on the measurement table 203 along the measurement direction so as to partially occlude each measurement hole, and the reference straightener 204 in each measurement hole 210 is and the gap between the band-like material 250 can be measured. Here, in order to facilitate the measurement of the gap between the reference straight ruler 204 and the band member 250 , the band member 250 is measured at a distance capable of partially occluding each measurement hole from the reference straight member 204 . Spacers 208 may be disposed along the direction. In the case of disposing the spacer 208, the actual value of the gap between the reference straight ruler 204 and the band member 250 is a value obtained by subtracting the offset of the spacer 208 from the measured value.

The method for measuring the meandering of the band-like material of the present invention is applicable to the band-like metal material of the present invention. In addition, the meander measuring method of the band-shaped material of this invention can be applied if it is an elongate band-shaped material, and it is not necessarily necessary to apply to a band-shaped metal material.

Example

Examples of the present invention are shown below, but the examples are provided for a better understanding of the present invention and its advantages, and are not intended to limit the invention.

A slitter having a structure shown in FIG. 3 of a Colson copper alloy (2-4 mass% Ni-0.4-1.0 mass% Si-Cu) as a metallic material having tensile strength, Vickers hardness, plate thickness and plate width shown in Table 1 Using the equipment, slit processing was performed on the metal material. For each embodiment and invention example, the length (110a, 110b) of the meandering prevention plate at the front end of the slitter, the presence or absence of the meandering prevention plate at the rear end of the slitter (140a, 140b, 160a, 160b, 170a, 170b), the band shape after the slit The width of the metal material was also adjusted as shown in Table 1.

The operating conditions of a slitter installation are as follows.

Guide roller 120: Installed on both sides in a straight line in the plate direction. The area in which the guide roller is provided is the same as the area in which the meandering prevention plates 110a and 110b of the preceding stage are provided.

Meandering prevention plate (110a, 110b) of the front stage: a veneer plate in which a commercially available nonwoven fabric is affixed to a surface in contact with a metal material. The weight was adjusted so that friction scratches did not occur.

Meandering prevention plates at the rear end (140a, 140b, 160a, 160b, 170a, 170b): A veneer plate in which a commercially available nonwoven fabric is affixed to a surface in contact with a metal material. The weight was adjusted so that friction scratches did not occur.

Weight 150: The weight was adjusted so as not to cause friction scratches.

Evaluation of each Example and Comparative Example was performed as follows.

<Tensile strength>

The tensile strength in the direction parallel to the rolling direction was measured according to JIS-Z2241 with a tensile tester.

<Vickers hardness>

According to JIS-Z-2244 (2009), a micro Vickers hardness test was performed with a load: 0.098 N, and the micro Vickers hardness was measured.

<Bent>

It measured based on JIS H 3100 (2012).

<Smile meandering curve>

Cut out for 1 m along the longitudinal direction of the strip-shaped metal material after the slit, put a straightedge on the side surface of the longitudinal direction, and measure the gap between the straightedge and the strip-shaped metal material in the direction perpendicular to the longitudinal direction for every 50 mm in length, and the maximum value is a micro meander It was set as the value of the curve.

<Presence of defective press>

As shown in FIG. 2, the process of manufacturing a pilot hole with a feed pitch (feed length), a process of conveying a material with a feed pitch (feeding length), a process of inserting a pilot punch into the pilot hole with a feed pitch (feeding length) A press test was performed in which the band-shaped metal strip was continuously fed by repeating this series of operations. In the press test, the presence of a defect and the absence of a defect were determined as follows.

-Press defective: The transfer of the band-shaped metal strip was stopped.

-Press defect exists: The edge of the strip-shaped metal strip after pressing was deformed by contact with the press machine structural part.

-Press defective: The edge of the strip-shaped metal strip after pressing was scratched due to contact with the press machine structural part.

· No press defect: None of the above stoppages, deformations and scratches were observed.

In Examples 1-11, since the value of a meandering was 0.12 mm or less, there was no defect in the subsequent press process. The value of bending was also able to be suppressed to 0.03 mm or less.

On the other hand, in Comparative Examples 1-6, since the meander value exceeded 0.13 mm, the defect generate|occur|produced in the subsequent press process. In particular, in Comparative Examples 1-3, although the value of the curvature was at a low level, since the value of the meandering was high, it turns out that the defect in a press process was not suppressed.

110a, 110b: front end of the meandering prevention plate
120: guide roller for preventing meandering
130: slitter
140a, 140b, 160a, 160b, 170a, 170b: Meandering prevention plate at the rear end
150: weight
200: metal material
203: measurement table
204: standard straight
208: spacer
210: measuring hole
250: band material

Claims (1)

When a straightedge is placed on the side surface in the longitudinal direction of the strip-shaped metal material after being wound up in a coil shape, shipped, and slit, the gap between the straightedge and the strip-shaped metal material in the direction perpendicular to the longitudinal direction is measured every 50 mm in length, the longitudinal direction of the strip-shaped metal material The maximum value of the said clearance gap per 1 m is 0.12 mm or less, The band-shaped metal material characterized by the above-mentioned, micro meandering bending was suppressed.

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