TWI663009B - Band-shaped metal material, longitudinal cutting method and meandering measurement method of band-shaped material - Google Patents

Abstract

The invention provides a strip-shaped metal material with a higher degree of parallelism after a longitudinal cut, and a longitudinal cutting method for obtaining such a strip-shaped metal material, and a method for rationally measuring the meandering of the strip-shaped material.

The invention relates to a strip-shaped metal material, a longitudinal cutting method, and a meandering measurement method of the strip-shaped material. The strip-shaped metal material is characterized in that a ruler is brought into contact with a side surface in the length direction of the strip-shaped metal material, with a length of 50 mm as a unit When measuring the gap between the ruler and the band-shaped metal material in a direction perpendicular to the length direction, the maximum value of the gap per 1 m in the length direction of the band-shaped metal material is 0.12 mm or less.

Description

   Band-shaped metal material, longitudinal cutting method and meandering measurement method of band-shaped material   

The invention relates to a strip-shaped metal material, a longitudinal cutting method for continuously cutting a metal material to a specific width along a length direction to obtain the strip-shaped metal material, and a method for measuring the meandering of the strip-shaped material.

On the production line of soft steel, copper, copper alloy, stainless steel and other metal materials, the metal materials are transported in the length direction and the final plate thickness is made by the rolling step, and then divided into specific bandwidths according to user expectations , And rolled up into coils and shipped. As a method of longitudinally cutting a metal material to a specific width, a method of passing a metal material through a slitter having a circular knife cutter arranged vertically is generally performed.

If the shape of the metal material before slitting is undulating instead of flat, the edges of both sides of the strip-shaped metal material after slitting are not parallel and straight, but shown as a curved shape as shown in Figure 2 . If it has such a curved shape, it is not suitable for applications requiring strict dimensional accuracy. For example, when the lead frame is processed from a strip-shaped metal material by etching, if the bending is large, it is difficult to use a pressing step at a fixed interval to make a hole, and the yield of the product is significantly reduced.

As a method for preventing bending, a method is known in which, before the metal material passes through the slitter, guide rollers arranged linearly in the conveying direction are pressed from both sides of the metal material (for example, Patent Document 1).

In addition, Patent Document 2 describes a longitudinal cutting device for a copper strip plate, which is a person who cuts a copper strip plate in a lengthwise direction, and includes: an unwinding rotation device that feeds out the copper strip plate; and a plurality of upper disc cutters. And lower disc cutters, which perform shear processing on the copper strip plate to the extent that it is not completely separated in the thickness direction; pressing rollers, which press the copper strip plate subjected to shear processing in the thickness direction, and It is completely separated and cut; and a winding rotating device is used for winding the thin copper strip plate that is separated and cut; and the blade heads of the upper disc cutter and the lower disc cutter are made of the following partial conical blades The head is composed of a partially tapered blade head including a flat portion having a contact angle of 0 ° with a copper strip plate and an inclined portion formed on an extension line of the flat portion and having an angle of 5-30 ° with the copper strip plate; The subsidiary effect of this invention also reduces the amount of bending of the thin copper strip that is slit.

Here, the measurement of the amount of bending is generally measured in accordance with JIS H 3100 (2012). Specifically, as shown in FIG. 2, it is referred to as the depth of an arc at an arbitrary position with respect to a reference length of 1000 mm.

    [Prior technical literature]         [Patent Literature]    

[Patent Document 1] Japanese Patent Laid-Open No. 10-109217

[Patent Document 2] Japanese Patent Laid-Open No. 2013-237116

However, in the above methods, the problem of reducing the product yield in the pressing step has not been completely solved. Furthermore, the present inventors have found that even if the amount of bending measured according to the JIS standard is reduced, there is a case where the problem of abnormality in the pressing step cannot be eliminated.

In addition, as a result of further intensive research by the inventors, it was found that when the metal material is continuously cut into a specific width along the length direction to obtain a band-shaped metal material, micro-vibrations in the width direction and the vertical direction are generated, whereby the band shape The metal material snakes in small cycles. There is a case where the serpentine of this microcycle (hereinafter referred to as "minor serpentine") cannot be detected according to the above JIS standard. As a result, even if the amount of bending measured according to the above JIS standard is reduced, it is impossible to obtain a suitable step for the pressing step. In the case of a band-shaped metal material.

Therefore, there is a need for a strip-shaped metal material having a high degree of parallelism in which the minute meandering is suppressed, and a slitting method for obtaining such a strip-shaped metal material. In addition to the above JIS standards, it is necessary to reflect a reasonable measurement method of minute serpentine fluctuations caused by microvibration during longitudinal cutting.

That is, the band-shaped metal material has both the amount of bending measured according to the JIS standard and the minute meandering. Therefore, even if the amount of bending measured according to the JIS standard is zero, the minute meandering is not zero.

The reason is that the amount of bending measured according to the JIS standard is different from the cause of the slight meandering. That is, the occurrence of the curvature measured according to the JIS standard is caused by the shape of the material before slitting. In addition, the shape of the material before the slitting is affected by the shape-correcting step or the relaxation annealing step after the finish-rolling step or the finish-rolling step. On the other hand, the occurrence of minute serpentine fluctuations is caused by the slitter equipment and the slitting method as described above.

Therefore, the object of the present invention is to provide a strip-shaped metal material having a high degree of parallelism after slitting, a slitting method for obtaining such a strip-shaped metal material, and a reasonable measurement of the minute meandering of the strip-shaped material. Method.

The present invention includes the following aspects.

(1) A strip-shaped metal material, in which a ruler is brought into contact with a side surface in the lengthwise direction of the strip-shaped metal material, and the gap between the length of the ruler and the strip-shaped metal material in a direction perpendicular to the length direction is measured in units of 50 mm in length, The maximum value of the gap per 1 m in the longitudinal direction of the band-shaped metal material is 0.12 mm or less.

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

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

(4) A method, which is a method of longitudinally cutting a metal material into a specific bandwidth while conveying it in the length direction, and includes a step of performing the slitting and the following steps (i) to (iii); the slitting step is used The following vertical slitter cuts a metal material into a specific bandwidth. The vertical slitter has two pairs of circular knife cutters for cutting edge areas on both sides of the metal material being transported in the length direction, and is arranged on the above. At least one pair of circular knife cutters on each inner side of the two pairs of circular knife cutters for cutting the above-mentioned metal material into a specific width; (i) ~ (iii) The steps are as follows: (i) Before the above-mentioned longitudinal cutting step, The movement direction of the metal material to be transported in the length direction is limited to the area from the position of the circular knife cutter to at least one time the width of the metal material, and the passing direction of the metal material is restricted from both sides; (ii) the above Before the slitting step, the movement of the metal material to be transported in the longitudinal direction from the front and back directions is limited to the area from the position of the circular cutter to the position of at least 1 times the width of the metal material; (iii) the above-mentioned slitting After the steps, take at least one Since the position of the forward and reverse directions of movement of the metal material after the vertical cutting disc knife from the limited position of the cutter to the position of three times the area of the metal material width.

(5) The method according to (4), further comprising the step of: leveling and correcting the metal material before performing the steps of restricting the movement of the metal material in the length direction from both sides and the front and back directions. .

(6) A meandering measurement method, which is a method for measuring the meandering of a band-shaped material, characterized in that a ruler is brought into contact with a side of the band-shaped material cut to a fixed length in the length direction, and the ruler is measured in units of a fixed distance Clearance in a direction perpendicular to the length of the strip.

(7) The meandering measurement method according to (6), wherein the pitch is not more than one tenth of the length of the strip.

According to the present invention, it is possible to obtain a band-shaped metal material having a high degree of parallelism in which meandering is suppressed, and it is possible to effectively suppress an abnormality in the pressing step.

110a, 110b ‧‧‧ The snake prevention board in the previous paragraph

120‧‧‧Guide roller for preventing meandering

130‧‧‧Slider

140a, 140b, 160a, 160b, 170a, 170b ‧

150b‧‧‧ heavy

200‧‧‧ metal material

203‧‧‧Measuring table

204‧‧‧ Reference Ruler

208‧‧‧ spacer

210‧‧‧Measuring hole

250‧‧‧ Strip

FIG. 1 is a schematic view showing a state in which a band-shaped metal material snakes.

FIG. 2 is a diagram showing a method of measuring a bending amount in JIS H 3100 (2012).

Fig. 3 is a schematic diagram showing the structure of a slitter device according to an embodiment of the present invention.

FIG. 4 is a diagram showing a meandering measurement method for a strip-shaped material according to an embodiment of the present invention.

(Band metal)

The type of the band-shaped metal material is not particularly limited, and examples thereof include steel, copper, copper alloy, and stainless steel.

Here, it is important that when the ruler is brought into contact with the side surface of the band-shaped metal material in the longitudinal direction and the gap between the ruler and the band-shaped metal material in a direction perpendicular to the length direction is measured in units of 50 mm in length, The maximum value of the gap per 1 m in the length direction of the metal material is 0.12 mm or less.

As described above, when a metal material is continuously cut into a specific width along the length direction to obtain a band-shaped metal material, micro-vibrations in the width direction and the vertical direction occur, whereby the band-shaped metal material snakes. Such meandering caused by microvibration does not necessarily appear as bending of a band-shaped metal material, so there is a case where the method of measuring the amount of bending in JIS H 3100 (2012) cannot be accurately measured. In order to accurately evaluate such meandering, it is necessary to increase the measurement points compared to the method in JIS H 3100 (2012). Therefore, in the present invention, when the ruler is brought into contact with the side surface of the band-shaped metal material in the longitudinal direction and the gap between the ruler and the band-shaped metal material in a direction perpendicular to the length direction is measured in units of 50 mm in length, the band shape The maximum value of the gap per 1 m in the length direction of the metal material is 0.12 mm or less. In this way, the value of the gap can be obtained from most measurement points, and the meandering caused by micro-vibration can be accurately reflected. As a result, it is possible to reliably provide a band-shaped metal material suitable for the subsequent pressing step and the like.

The details of the method of measuring the maximum value of the gap will be described later.

In addition, it is preferable that the band-shaped metal material satisfies the above conditions and has a bending amount per 1 m in the longitudinal direction of 0.03 mm or less. This bending amount is a value obtained by a measuring method of the bending amount in JIS H 3100 (2012). This can further ensure the quality of the band-shaped metal material.

If the tensile strength of the band-shaped metal material is 600 MPa or more, it can be said that it has the necessary strength as a material for electrical and electronic parts. There is also a case where processing becomes difficult if the tensile strength exceeds 950 MPa. Therefore, it is preferably 950 MPa or less. In addition, from the viewpoint of both strength and workability being equal, the Vickers hardness of the band-shaped metal material is preferably 180 to 300.

Next, the longitudinal cutting machine equipment and the longitudinal cutting method of the present invention will be described with reference to the drawings. FIG. 3 is a schematic diagram showing the structure of a slitter device (100) according to this embodiment. The long strip of metal material (200) rolled from a pay-off reel (not shown) is transported in the lengthwise direction and is slitted in a slitter (130) into the required bandwidth. After the division, the metal material (200) can be wound into a coil shape by a tension roller (not shown), respectively. Although not shown, the metal material (200) can be loosened in a ring shape at the front and rear sections of the slitter equipment (100). This makes it easy to adjust the conveying speed of the metal material (200).

The type of the longitudinally-cut metal material (200) is not particularly limited, and examples thereof include mild steel, copper, copper alloy, and stainless steel. In terms of obtaining a metal material (200) with a higher degree of parallelism after the slitting, it is preferable that the metal material (200) is leveled and corrected by a leveling roller or the like before it enters the slitter (130). And improve the flatness. The thickness of the metal material is preferably set to 0.10 to 0.16 mm. If it is less than 0.10 mm, the strength is low, and it is difficult to use the metal alone, and it is necessary to adhere to a resin or the like. If it exceeds 0.16mm, the bending radius must be set to a large value during bending processing, which is not suitable for miniaturization of electric and electronic parts. The width of the strip-shaped metal material after the vertical cutting is preferably set to 100 to 200 mm. If it is less than 100 mm, productivity is poor, and if it exceeds 200 mm, it is difficult to perform press processing with stable quality over the entire width.

(Guide rollers)

In front 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 restricting the passing direction of the metal material (200) from both sides. When the metal material (200) in transit starts to snake, the side of the metal material (200) abuts against the side of the guide roller (120) to prevent the snake and correct it in a specific passing direction. The rotation axis of the guide roller (120) is parallel to the front and back directions of the metal material (200), whereby the rotation direction of the guide roller and the penetration of the metal material (200) when the metal material (200) abuts the guide roller (120) Passing directions are consistent. This can reduce the friction between the metal material (200) and the guide roller (120). In order to ensure the effect of preventing the meandering, the guide roller (120) must be arranged in the area of the position of the circular knife cutter of the following vertical cutter to at least one time the width of the metal material. In order to improve the meandering prevention effect, it is preferable that a plurality of guide rollers (120) are linearly arranged on each side. The guide rollers (120) are preferably arranged in pairs on opposite sides of the metal material (200).

(Snake prevention plate in front of slitter)

However, if only the guide roller (120) is provided, the meandering prevention effect is limited, and the meandering cannot be prevented at a high level. In addition, the movement of the metal material (200) in the up and down direction cannot be restricted by the guide roller (120) alone, so there may be a case where the metal material (200) passes over the guide roller (120). Therefore, it is effective to provide a pair of meandering prevention plates (110a, 110b) for pressing one of the metal materials (200) from above and below as a meandering prevention means in front of the slitter (130). From the viewpoints of preventing meandering, preventing undulation, and preventing the guide roller (120) from passing, it is preferred that the guide roller (120) and the meandering prevention plate (110a, 110b) have at least a partial overlap in a length direction. The lower snake prevention plate (110b) may be laid on an appropriate base or floor, and the upper snake prevention plate (110a) may be placed on the upper side so as to sandwich the metal material (200) in transit. By providing a meandering prevention plate (110a, 110b) in addition to the guide roller (120), the meandering of the metallic material (200), undulations, and passing over the guide roller are suppressed, so that the substrate can enter the slitting step in a flatter state. . In order to ensure the effect of preventing the meandering, the meandering prevention plates (110a, 110b) must be arranged in the area of the position of the circular cutter of the following vertical slitter to at least one time the width of the metal material.

It is preferable to attach a sheet of a material with low friction resistance, such as a commercially available non-woven fabric, to the surface of the meandering prevention plate (110a, 110b) in contact with the metal material (200) so as not to damage the metal material (200). , And does not make the conveying resistance larger. The meandering prevention plate (110a, 110b) can appropriately set the pressing force of the metal material (200) while taking into account the effect of preventing the meandering prevention. Even when the meandering prevention plate (110a, 110b) is made of plywood, the weight can be obtained. Full effect. In the case where the weight of the meandering prevention plate cannot sufficiently obtain the meandering prevention effect, it is also possible to place a heavy object on the meandering prevention plate.

From the viewpoint of improving the meandering prevention effect, it is preferable that the width of the meandering prevention plates (110a, 110b) is set to be greater than the width of the metallic material (200), and the metallic material (200) is pressed in the entire width direction of the metallic material (200) ( 200). The length of the meandering prevention plate (110a, 110b) in the passing direction may be set appropriately in consideration of the meandering prevention effect. The upper and lower meandering prevention plates (110a, 110b) may be constituted by a single piece, and may be constituted by arranging a plurality of pieces in the conveying direction. Specifically, the length of the meandering prevention plate (110a, 110b) in the passing direction is preferably 500 to 800 mm.

(Slitting machine)

Referring to FIG. 3, in an embodiment, the vertical cutting machine (130) may have: two pairs of upper and lower circular knife cutters, which are used to cut off the edge regions on both sides of the metal material conveyed in the length direction; and at least A pair of upper and lower circular knife cutters are arranged on the inner sides of the two pairs of circular knife cutters to cut the metal material into a specific width.

(Snake prevention plate at the back of the slitter)

In order to significantly improve the parallelism of the metal material (200) after slitting, it is effective that a snake prevention plate (140a, 140b, 160a, 160b, 170a, 170b) is also provided at the rear section of the slitter (130). By preventing the metal material (200) from slicing after the vertical cutting, the metal material (200) after the vertical slicing can be prevented from overlapping, and the metal material (200) after the vertical slicing also helps to prevent the vertical slicing and the vertical slicing. Prevention of snakes in the metal material (200). In order to ensure the effect of preventing the meandering, the meandering prevention plate (140a, 140b, 160a, 160b, 170a, 170b) must be arranged in the area from the position of the circular cutter of the vertical cutter to a position more than three times the width of the metal material. When the weight of the meandering prevention plate (140a, 140b, 160a, 160b, 170a, 170b) cannot sufficiently obtain the meandering prevention effect, a weight (150) may be placed on the meandering prevention plate. The preferred aspect of the meandering prevention plate (140a, 140b, 160a, 160b, 170a, 170b) is the same as the meandering prevention plate (110a, 110b) in the front section of the slitter (130), so the description is omitted.

Next, the meandering measurement method of the belt-shaped material of this invention is demonstrated. When measuring the meandering of the strip, the ruler is in contact with the side of the strip that is cut to a fixed length in the length direction, and the distance between the ruler and the strip at right angles to the length is measured in units of a fixed length. Clearance in directions. With this, it is possible to effectively reflect the meandering caused by the micro-vibration during the longitudinal cutting to the measurement result. For example, the distance can be set to a length of less than one-tenth of the length of the strip, and measured at 10 points or more. The maximum value obtained can be set as the mean value of the meandering, and the maximum value can be qualified if it is less than the fixed value. .

For example, as shown in FIG. 4, on a measuring table having a plane on which a belt-shaped material (250) is placed, and a plurality of measuring holes (210) provided along the measuring direction at a certain distance along the measuring direction ( 203), the reference ruler (204) is placed on the above-mentioned measuring table (203) along the measurement direction so as to partially cover each measurement hole, and the reference ruler (204) and each of the measurement holes (210) can be measured. The gap of the strip (250). Here, in order to easily measure the gap between the reference ruler (204) and the band-shaped member (250), the band-shaped member (250) and the reference ruler (204) may be separated from each other so as to partially cover the distance of each measurement hole. The spacer (208) is arranged along the measurement direction. When the spacer (208) is arranged, the actual value of the gap between the reference ruler (204) and the strip (250) is the value obtained by subtracting the offset of the spacer (208) from the measured value.

The meandering measurement method of the strip-shaped material of the present invention can be applied to the strip-shaped metal material of the present invention. In addition, the meandering measurement method of the strip-shaped material of the present invention is applicable as long as it is a strip-shaped strip material, and it may not necessarily be applied to a strip-shaped metal material.

    [Example]    

The following shows examples of the present invention. The examples are provided for better understanding of the present invention and its advantages, and are not intended to limit the invention.

For Carson copper alloys (2 ~ 4 mass% Ni-0.4 ~ 1.0 mass% Si-Cu) with metallic materials with tensile strength, Vickers hardness, plate thickness and plate width shown in Table 1, use Figure 3 The slitter device of the structure shown performs slitting of metallic materials. Regarding the embodiments and invention examples, the length of the meandering prevention plate (110a, 110b) in the front section of the slitter, the presence or absence of the meandering prevention plate (140a, 140b, 160a, 160b, 170a, 170b) in the rear section of the slitter, and the longitudinal cutting machine The width of the band-shaped metal material is also adjusted as described in Table 1.

The operating conditions of the slitter equipment are as follows.

Guide roller (120): linearly arranged on both sides in the passing direction. The area where the guide roller is installed is set to be the same as the area where the meandering prevention plate (110a, 110b) at the previous stage is provided.

Snake prevention plate (110a, 110b) in the previous stage: a commercially available non-woven plywood is affixed to the surface contacting the metal material. Adjust the weight in a way that does not cause abrasions.

Snake prevention plate (140a, 140b, 160a, 160b, 170a, 170b) at the rear stage: a commercially available non-woven plywood is affixed to the surface contacting the metal material. Adjust the weight in a way that does not cause abrasions.

Weight (150): Adjust the weight in such a way as not to cause abrasions.

Evaluation of each Example and a comparative example was performed as follows.

<Tensile strength>

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

<Vickers hardness>

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

<Bend>

The measurement was performed in accordance with JIS H 3100 (2012).

<Tiny Serpentine Ups and Downs>

Cut 1m along the length direction of the strip-shaped metal material after vertical cutting, make the ruler contact the side of the length direction, and measure the gap between the ruler and the strip-shaped metal material at a right angle to the length direction with a length of 50mm. , Set its maximum value to the value of tiny snakes.

<Presence or absence of suppression>

As shown in Fig. 2, the steps of making guide holes at the travel pitch (travel length), the steps of conveying materials at the travel pitch (travel length), and the steps of inserting the positioning punch into the guide holes at the travel pitch (travel length) are sequentially performed. , By repeating this series of actions, a pressing test for continuously conveying the belt-shaped metal belt is performed. In the compression test, the presence or absence of abnormality was determined as follows.

‧Suppressed abnormally: Stop the conveyance of the ribbon metal belt.

‧Suppressed abnormality: The edge of the strip-shaped metal strip after pressing is deformed by contact with the structure of the press.

‧Suppressed abnormality: The edge of the strip-shaped metal belt after the pressing is damaged due to contact with the structure of the pressing machine.

‧No suppression of abnormality: No stopping, deformation and damage were found.

In Examples 1 to 11, since the value of the meandering was 0.12 mm or less, there was no abnormality in the subsequent pressing step. The value of bending can also be suppressed to 0.03 mm or less.

On the other hand, in Comparative Examples 1 to 6, since the value of the meandering exceeded 0.13 mm, an abnormality occurred in the subsequent pressing step. In particular, in Comparative Examples 1 to 3, it can be seen that since the value of the bending is at a low level, but the value of the meandering is high, the abnormality in the pressing step cannot be suppressed.

Claims (7)

A strip-shaped metal material is provided by placing the strip-shaped metal material on a plane, and making a ruler contact a side surface in the length direction of the strip-shaped metal material placed on the plane, and measuring the ruler and When the gap between the strip-shaped metal material and the length direction is at right angles, the maximum value of the gap per 1 m in the length direction of the strip-shaped metal material is 0.12 mm or less. The band-shaped metal material according to claim 1, wherein the bending amount per 1 m in the longitudinal direction is 0.03 mm or less. The strip-shaped metal material according to claim 1 or 2, wherein the strip-shaped metal material is a strip-shaped metal material of copper or a copper alloy. A longitudinal cutting method is a method of longitudinally cutting a metal material into a specific bandwidth while conveying it in the length direction, and includes a longitudinal cutting step and the following steps (1) to (3): This longitudinal cutting step is used under The vertical cutting machine cuts the metal material into a specific bandwidth, and the vertical cutting machine has two pairs of circular knife cutters for cutting off the edge areas on both sides of the metal material being transported in the length direction, and the two cutting tools are arranged on the two At least one pair of circular knife cutters on each inner side of the circular knife cutter and used to cut the above-mentioned metal material into a specific width; (1) ~ (3) The steps are as follows: (1) Before the above vertical cutting step, In the length direction, the movement of the metal material is limited to the area from the position of the circular knife cutter to at least one time the width of the metal material, and the passing direction of the metal material is restricted from both sides; (2) the vertical direction Before the cutting step, the movement of the metal material to be transported in the longitudinal direction from the front and back directions is limited to the area from the position of the circular knife cutter to a position at least 1 times the width of the metal material; (3) The vertical cutting step described above After that, at least one The position restricts the movement of the metal material after the vertical cutting to the area from the position of the circular knife cutter to a position three times the width of the metal material from the front and back directions. The longitudinal cutting method according to claim 4, further comprising the step of: leveling and correcting the metal material before performing the steps of restricting the movement of the metal material carried in the length direction from both sides and the front and back directions. A meandering measurement method comprising a band-shaped material meandering method, characterized in that a band-shaped material cut into a fixed length in a longitudinal direction is placed on a flat plate, and a ruler is in contact with a side of the band-shaped material on the flat plate, Measure the gap in the direction perpendicular to the length of the ruler and the length of the band-shaped material in units of a fixed distance. The meandering measurement method according to claim 6, wherein the pitch is less than one tenth of the length of the strip.