JPWO2014021251A1 - Cold-working method and apparatus for strip workpiece - Google Patents

Abstract

Cold working method and apparatus for strip work that can correct deformation such as camber and warping in side view by cold working after slitting and / or slitting on a slitting machine, and long Providing plate products. The cold work processing apparatus (100) for the belt-like workpiece is arranged in a belt-like manner by being arranged on the downstream side in the transport direction with a transport unit (150, 180) that transports the belt-like workpiece in the transport direction A along the longitudinal direction of the belt-like workpiece (10). The first clamp part (130) for clamping the work, the second clamp part (170) arranged on the upstream side in the transport direction for clamping the belt-like work, and the first and second clamp parts for clamping the belt-like work are relative to each other. The belt-like workpiece between the first and second clamp portions is moved along the longitudinal direction and extended to the plastic region by applying a tensile force to release the tensile force, and the first and second clamp portions. And a tension / release drive part (321) for elastically recovering a part of the plastic elongation generated in the belt-like workpiece.

Description

  The present invention relates to a method for cold working a belt-like workpiece, an apparatus therefor, and a long plate-like product, and in particular, an elongated and long length whose aspect ratio (ratio of length to width of the long plate-like product) exceeds 30. A long plate-shaped product and a strip-shaped workpiece having a length that allows a large number of the long plate-shaped products to be obtained are preferably used.

  For example, a method of correcting a camber (lateral bending) generated in a wide rolled material such as aluminum, copper, and an alloy thereof by adjusting a roller position, a pressure, a left / right adjustment component of an opening degree, etc. during rolling is known ( Patent Documents 1 to 3). However, these techniques result in uneven distribution of compressive or tensile residual stress in the width and length directions inside the wide rolled material as a result of the adjustments described above. Further, the uneven distribution tendency of the residual stress is further increased by winding the camber while forcibly correcting the slightly occurring camber at the time of winding. In addition, the tendency that this residual stress is unevenly distributed exists more notably in the width direction than the length direction of the wide rolled material, and may appear. A roller leveler is also known in which a pair of rollers are provided above and below a path through which a strip-shaped workpiece that is a rolled material passes, and a plurality of pairs of rollers are arranged in a staggered manner in a side view (Patent Document 4). With this roller leveler, the workpiece is repeatedly bent from the upper and lower rollers, with or without heating, to reduce uneven plastic elongation in the longitudinal direction of the strip-like workpiece caused by slight unevenness of rolling. Is done. Thereby, the belt-like workpiece surface is flattened.

JP-A-4-305304 JP-A-7-214131 JP 2011-25289 A JP-A-6-182445

  Cut out from a wide rolled material by shearing into a large plate with a length obtained by adding the processing allowance at both ends to the product length of a long and long long plate product with an aspect ratio exceeding 30, or At the same time, there is a product processing technique for processing the cut out large plate into a long plate-like product by press punching using a mold having the shape of a long and long long plate-like product. As shown in FIG. 34, in the technique of continuous press punching using a die having a contour shape of a long plate-like product 810 from a large plate 800 cut out from a wide rolled material, the material is usually “ Each long plate product 810 needs to be punched at intervals called “bridges”, resulting in a large amount of scrap and a very poor material yield. Further, since the large plate 800 cut out from the wide rolled material has the residual stress of compression or tension distributed unevenly in the width and length directions described above, the aspect ratio in which the internal stress is released by being punched out. A long plate-shaped product 810 having a thickness exceeding 30 is caused by a combination of many deformations such as camber, warpage, twisting, and undulation, and has a problem that it cannot be used as it is.

  In addition, for the problem of mass scrap due to continuous press punching from a large plate cut from a wide rolled material, a plurality of disk-shaped rotary blades (cutter tools) are respectively provided on the upper and lower two axes from the wide rolled material. A slitting machine (not shown) assembled with a desired number of sets at a desired interval is used to slit a strip having a width of a narrow long plate product into a plurality of strips, and each of the strips has a long plate product length. This can be prevented by cutting it into pieces, and it is possible to eliminate the waste that the same length as the long plate-like product and the “span width” material becomes as many scraps as the number of products produced.

  However, the strip material that has been slit by the slitting machine is not subjected to residual compression or tension in the width and length direction of the rolled material due to adjustment of each part of the rolling device during rolling of the wide rolled material. There is a non-uniform distribution of stress. In addition, there is a clearance between the opposing rotary blades of the slitting machine, and this clearance is generated for each combination of rotary blades, that is, for each edge of each slit strip. Each of the slit strips is further unevenly distributed in the distribution of compressive or tensile residual stress in the width and length directions. As a result, a large camber (lateral bending) and irregular warping or twisting (swell) occur in the strip. That is, when a strip-shaped workpiece is processed into a strip-shaped workpiece by a slitting machine, a warp S1 as viewed from the longitudinal end portion shown in FIG. ), A torsion (swell) M seen from the side surface shown in FIG. 35, a camber C that turns sideways in a plan view shown in FIG. 35C, a warp S2 seen from the side surface shown in FIG. . The camber C means a lateral bend in a plan view. When a long plate-like product is placed upright, for example, by placing one side surface thereof, the one side surface is linear along the longitudinal direction. It is a phenomenon that bends sideways. As shown in FIG. 35C, the maximum gap from the virtual placement surface T to one side of the long plate product is measured as the camber C amount.

  As shown in FIG. 35 (A), if only the warp S1 viewed from the end in the longitudinal direction is passed through the roller leveler shown in Patent Document 4, it may be corrected by flattening. In addition, since the camber shown in FIG. 35C also occurs during rolling, the camber during rolling may be corrected, for example, as described in Patent Documents 1 to 3. However, even if it can be corrected, if the slitting machine subsequently slits a wide rolled material into a narrow strip-shaped workpiece, the residual stress that has been restrained is released and appears as a strain, resulting in a large camber. .

  Accordingly, some embodiments of the present invention provide a strip-like workpiece that can correct deformation such as camber or warping or twisting (swell) in a side view by cold working after slitting or the like on a slitting machine. An object of the present invention is to provide a cold working method and apparatus therefor, and a long plate product.

One embodiment of the present invention provides:
A first step of clamping the belt-like workpiece by the first and second clamp portions at a position spaced apart in the longitudinal direction of the belt-like workpiece;
The first and second clamp portions that clamp the belt-like workpiece are relatively moved along the longitudinal direction, and the belt-like workpiece between the first and second clamp portions is plasticized by applying a tensile force. A second step extending to the area;
The third force that releases the tensile force applied to the belt-like workpiece between the first and second clamp portions and elastically recovers a part of the plastic elongation generated in the belt-like workpiece between the first and second clamp portions. Process,
Thereafter, a fourth step of processing the strip-shaped workpiece between the first and second clamp parts into a long plate product,
The present invention relates to a method for cold working of a strip-shaped workpiece having the following.

Another aspect of the present invention is:
A transport unit that transports the strip-shaped workpiece in a transport direction along the longitudinal direction of the strip-shaped workpiece;
A first clamp part disposed on the downstream side in the transport direction and clamping the belt-like workpiece;
A second clamp part disposed on the upstream side in the transport direction and clamping the belt-like workpiece;
The first and second clamp portions that clamp the belt-like workpiece are relatively moved along the longitudinal direction, and the belt-like workpiece between the first and second clamp portions is plasticized by applying a tensile force. A tension / release drive unit that extends to a region, releases the tensile force, and elastically recovers a part of the plastic elongation generated in the belt-like workpiece between the first and second clamp units;
The present invention relates to a cold work apparatus for a strip-shaped workpiece having the following.

  According to the one aspect and the other aspect of the present invention, the band-shaped workpiece between the first and second clamp portions is plasticized by releasing the tensile force after the tensile force is applied and extended to the plastic region. Part of the elongation is elastically recovered. The magnitude of the tensile force is such that even if the belt-like workpiece is extended to the plastic region, it can be elastically recovered without breaking. By applying a tensile force to the belt-like workpiece, the processing history of the belt-like workpiece so far is almost canceled, and plastic strain aligned in one direction is uniformly formed on the belt-like workpiece. As a result, non-uniform internal residual stress generated during rolling and non-uniform and unbalanced internal residual stress generated on both sides in the width direction during slit processing (shear processing) are almost constant in each part. There is almost no sheath imbalance. As a result, deformation including camber, warpage, and waviness that occurs during rolling and / or slit processing (shear processing) for width dimension processing is corrected and straightens in both the length direction and the width direction. In addition, it is expected that the hardness is improved by work hardening by plastic deformation.

  In one aspect of the present invention, in the second step, the belt-like workpiece having a length L between the first and second clamp portions is elongated to a length (L + ΔL1), and in the third step, the first and first The belt-like workpiece between the second clamp portions can be returned to a length (L + ΔL2) (where ΔL1> ΔL2> 0). In another aspect of the present invention, the above-described second and third steps can be performed by the tension / release drive unit.

  In one aspect of the present invention, the strip-shaped workpiece between the first and second clamp portions is stretched to a length L + ΔL2 by releasing the tensile force after the tensile force is applied and extended from the length L to L + ΔL1. Plastically deformed. The elastic recovery is performed until the elongation ΔL2 when the tensile force is released is smaller than the elongation ΔL1 when the tensile force is applied. In a state where the permanent elongation ΔL2 is generated in the strip-shaped workpiece between the first and second clamp portions, the plate thickness and width of the strip-shaped workpiece can be within the product specification without deteriorating the appearance quality due to plastic deformation or the like. .

  In one aspect of the present invention, the first to fourth steps are performed in each of an Nth (N is an integer) cycle and a (N + 1) th cycle by transporting the strip-shaped workpiece in a transport direction along the longitudinal direction. And the second step is configured such that the second clamp portion disposed on the upstream side in the transport direction is moved in the transport direction with respect to the first clamp portion disposed on the downstream side in the transport direction. It can be moved in the opposite direction. In another aspect of the present invention, the tension / release part moves the second clamp part in a direction opposite to the transport direction with respect to the first clamp part, thereby applying the tensile force to the belt-like workpiece. can do.

  For example, the belt-like workpiece is transported in the longitudinal direction by being sent out from a state wound in a coil shape. In this manner, the first to fourth steps can be repeated over a plurality of cycles for the strip-shaped workpiece that is intermittently or continuously conveyed. At that time, in the second step of each cycle, the second clamp portion on the upstream side is moved in the direction opposite to the conveyance direction with respect to the first clamp portion on the downstream side. Thus, when the second step and the third step are performed, the position of the first clamp region clamped by the first clamp portion on the downstream side does not move, whereas the clamp is performed by the second clamp portion on the upstream side. The position of the second clamp region thus made is shifted. Therefore, the strip-shaped workpiece can be processed in the fourth step with reference to the position of the first clamp region where the position is stationary. At that time, since the object to be processed is upstream of the first clamp area, it is possible to process the strip-shaped product into a long plate-shaped product by transporting the strip-shaped workpiece further forward with respect to the first clamp area.

  In another aspect of the present invention, the transport unit is disposed between the first and second clamp units, and a pair of drive rollers disposed above and below the belt-shaped workpiece are disposed along the transport direction. Multiple pairs of all-wheel drive rollers can be included.

  With the all-wheel drive roller, it is possible to prevent the belt-like workpiece from slipping between the rollers to cause conveyance failure or conveyance delay, or to prevent the belt-like workpiece from being meandered and conveyed.

  In one aspect of the present invention, in the first step of the Nth cycle and the (N + 1) th cycle, the first clamp portion clamps at least a part of the conveyance tip of the belt-like workpiece, and the Nth cycle In the fourth step of the (N + 1) th cycle, the tip removal is performed such that the belt-like workpiece is transported after releasing the clamping force at the first and second clamp portions, and the transport tip is removed from the belt-like workpiece. Steps may be included. In another aspect of the present invention, the belt-shaped workpiece is transported after the clamping force at the first and second clamp portions is released, which is disposed downstream of the first clamp portion in the transport direction. It further has a cutting part that cuts and removes the tip part, and the conveyance tip part of the band-like work is clamped by the first clamp region clamped by the first clamp part and the second clamp part. And a second clamping region.

  In this way, it is possible to prevent the conveyance tip portion that has not been corrected by being clamped by the first clamp portion from being used as a part of the long plate-like product.

  In one aspect of the present invention, the second clamp region of the belt-like workpiece that has been clamped by the second clamp portion in the first step of the N cycle is defined before the first step of the (N + 1) cycle. And detecting the second clamp region in the first step of the N cycle by the first clamp part in the first step of the (N + 1) cycle. It can be overlapped with the clamp area. In another aspect of the present invention, the apparatus further includes a detection unit that detects the second clamp region of the strip-shaped workpiece that has been clamped by the second clamp unit, and the transport roller is the tension / release drive unit. The tensile force is released and driven after the clamp is released by the first and second clamp parts, and is stopped based on the output from the detection part, and the second clamp region is moved to the first clamp part. The first clamping region to be clamped can be overlapped.

  By carrying out like this, it can prevent that the clamp area | region which was not corrected by being clamped by the 1st, 2nd clamp is used for a part of elongate plate-shaped product. In addition, since part or all of the clamping regions in the first and second clamps overlap, the area of the clamping region is minimized. Therefore, the length of the end material removed from the belt-like workpiece is minimized, and the material can be used effectively.

  In one aspect of the present invention, the method further includes a step of providing a marking portion to the belt-like workpiece before the fourth step of the Nth cycle, and before the first step of the (N + 1) cycle, The position of the marking part is detected, the conveyance of the belt-like workpiece is stopped, and the first clamp area in the first clamp part can be set. In another aspect of the present invention, the sensor further includes a marking imparting portion that imparts a marking portion to the belt-like workpiece in a region having a certain positional relationship with the second clamp region, and the detection portion detects the marking portion. can do.

  It is easy to detect the position of the marking part and set the first clamping area clamped by the first clamping part to be substantially the same as the second clamping area previously clamped by the second clamping part. It becomes.

  In one mode of the present invention, the conveyance tip part removed from the beltlike work at the tip removal process can include the clamp area and the marking part. In another aspect of the present invention, the marking imparting portion can impart the marking portion within the second clamp region.

  If it carries out like this, a marking part can be removed from a strip | belt-shaped workpiece | work with a clamp area | region so that a marking part may not remain in a long plate-shaped product. The marking portion can be applied with external processing such as drilling or ink application.

  In one aspect of the present invention, when the length of the long plate-like product is Lp, L> Lp × n (n is a natural number), and the fourth step is to form a strip-shaped workpiece having the length L to n. There may be included a step of separating the long plate-like product. In another aspect of the present invention, when the length of the long plate product is Lp, L> Lp × n (n is a natural number), and the length Lp of the long plate product is measured. And a cutting portion that cuts the strip-shaped workpiece for each length L measured by the length measuring portion and separates it into n pieces of the long plate-like product. .

  That is, it is not limited to one that takes one long plate-like product from the strip-like workpiece between the first and second clamp portions, and a plurality of pieces can be taken. By taking a plurality of products, the length of the clamp area per long plate-like product is reduced, so that the material can be used efficiently.

  In one aspect of the present invention, when changing the length of the long plate-like product, the position between the first and second clamp parts is adjusted by adjusting the position of at least one of the first and second clamp parts. A step of changing the length L can be further included. In another aspect of the present invention, it further includes a clamp position adjusting mechanism that adjusts at least one position of the first and second clamp portions to change the length L between the first and second clamp portions. be able to.

  As indicated by L> Lp × n, the length L of the strip-shaped workpiece between the first and second clamp portions is such that the material that is removed wastefully as the length of the long plate-like product is closer to an integer n times Lp. Does not occur. Therefore, when changing the length of the long plate-like product, it is preferable to change the length L between the first and second clamp portions.

  In one aspect of the present invention, when the length of the long plate-like product is Lp, L> Lp × n (n is an integer of 2 or more), and is removed from the belt-like workpiece in the tip removal step. When the length of the transport tip is Ls, the relationship of 100 × (Ls−ΔL2) / (L + ΔL2) <1.4% can be satisfied.

  While the length L and the permanent elongation ΔL2 of the belt-shaped workpiece corrected by taking a plurality of the workpieces become longer, the length Ls of the conveyance tip is constant regardless of the number of long plate-shaped products. Therefore, the loss rate defined by 100 × (Ls−ΔL2) / (L + ΔL2) is set to 1. by setting the length L and the number n of the strip-shaped workpieces for each length Lp of the long plate-like product. It can be reduced to less than 4%.

  In one embodiment of the present invention, the plastic elongation calculated by 100 × ΔL1 / L can be 0.5% to 2%. The elastic recovery is achieved by releasing the tensile force by setting the tensile length ΔL1 when the tensile force is applied to the length L of the strip-shaped workpiece between the first and second clamps to 0.5 to 2%. Thus, plastic deformation having a permanent elongation of ΔL2 is realized. In addition, it was confirmed that the camber can be reduced or eliminated to the extent that there is no practical problem by this range of tension.

  In one aspect of the present invention, it may further include a forming step of increasing a cross-sectional secondary moment of the strip-shaped workpiece before the first step to the third step. Moreover, in another aspect of the present invention, it may further include a forming portion that is provided on the upstream side of the second clamp portion in the transport direction and increases the cross-sectional second moment of the strip-shaped workpiece. In still another aspect of the present invention, a long plate-like product having a large secondary moment of section can be obtained by providing convex ribs or concave ribs that are continuously formed in the longitudinal direction of the belt-like workpiece.

  The cross-sectional secondary moment is the amount that indicates the difficulty of deformation of the strip-shaped workpiece with respect to the bending moment. By increasing the sectional secondary moment of the strip-shaped workpiece by forming, the bending rigidity of the strip-shaped workpiece can be increased. it can. The machining history including non-uniform internal residual stress that occurs in the strip-shaped workpiece during the forming process is canceled by plastic working that applies a tensile force in the first to third steps that are performed thereafter. Thereby, the plastic strain of the belt-like workpiece whose flatness is further improved by increasing the bending rigidity is aligned in one direction.

  Still another aspect of the present invention is a long plate-like product manufactured by the method according to one aspect of the present invention described above, and the permanent elongation calculated by 100 × ΔL2 / L is 0.15% to 1 It relates to a long plate-like product that is 6%.

  When the elastic elongation is recovered after pulling with a plastic elongation of 0.5 to 2%, the permanent elongation is 0.15 to 1.6%. Therefore, the long plate-shaped product according to another aspect of the present invention can be a plastic processed product having a permanent elongation of 0.15% to 1.6%.

  In another aspect of the present invention, the first clamp portion includes a pressing portion that is driven by a first pressing force and presses the band-shaped workpiece in the first clamping region, and the cutting portion includes the pressing portion. A lifting block guided along a side surface and provided with a cutting blade, and the lifting block is maintained at an upper limit position in an extended state, and the lifting block is in a compressed state when a second pressing force is applied to the lifting block. And an urging member that integrally moves the pressing portion.

  In this way, the belt-like workpiece can be clamped by using the second pushing force for cutting, at least during cutting, preferably from immediately before cutting to during cutting.

  In another aspect of the present invention, the cutting portion may include an air cylinder and a rod that generate the second pressing force, and a gap may be provided between the rod and the lifting block.

  If it carries out like this, a raising / lowering block will be pressed by the rod accelerated enough by moving the distance of a gap, and the cut end of a strip | belt-shaped workpiece | work can be sharpened and cut | disconnected.

FIG. 1 is a diagram showing an initial marking process in an embodiment of the method of the present invention. FIG. 2 is a diagram showing a marking portion detection / positioning step in the embodiment of the method of the present invention. FIG. 3 is a diagram showing a clamping step (first step) in the embodiment of the method of the present invention. FIG. 4 is a diagram showing a tensioning step (second step) in the embodiment of the method of the present invention. FIG. 5 is a diagram showing the load-elongation characteristics of the belt-like workpiece. FIG. 6 is a diagram showing a tension releasing step (third step) in the embodiment of the method of the present invention. FIG. 7 is a view showing a feeding step of the conveyance tip portion which is a part of the processing step (fourth step) to the long plate product in the embodiment of the method of the present invention. FIG. 8 is a view showing a removal step of the conveyance tip portion, which is a part of the processing step (fourth step) into the long plate product in the embodiment of the method of the present invention. FIG. 9 shows a part of the processing step (fourth step) into a long plate-shaped product in the embodiment of the method of the present invention, and shows the separation step of the first long plate-shaped product from the strip-shaped workpiece of length L + ΔL2. FIG. FIG. 10 shows a part of the processing step (fourth step) into a long plate-shaped product in the embodiment of the method of the present invention, and shows the separation step of the last long plate-shaped product from the strip-shaped workpiece of length L + ΔL2. FIG. FIG. 11 is a front view schematically showing the entire apparatus according to the embodiment of the present invention. FIG. 12 is a view showing a belt-like workpiece supply device of the apparatus shown in FIG. FIG. 13 is a plan view of the upstream block portion of the cold working apparatus shown in FIG. FIG. 14 is a front view of the upstream block portion of the cold working apparatus shown in FIG. FIG. 15 is a diagram illustrating details of the second clamp portion and the marking applying portion. FIG. 16 is a plan view of the downstream block portion of the cold working apparatus shown in FIG. FIG. 17 is a front view of the downstream block portion of the cold working apparatus shown in FIG. 11. FIG. 18 is a diagram showing details of the first clamp part and the cutting part. FIG. 19 is a plan view of a shape processing apparatus for a long plate product. FIG. 20 is a front view of a shape processing apparatus for a long plate-shaped product. FIG. 21A is a diagram illustrating a first step of shape processing, and FIG. 21B is a cross-sectional view taken along the line II in FIG. FIG. 22A is a diagram showing a second step of shape processing, and FIG. 22B is a cross-sectional view taken along the line II-II in FIG. FIG. 23 is an explanatory diagram showing a press working procedure for molding the terminal shape of a long plate product. FIG. 24 is a schematic perspective view of an entire product including an example of a long plate product according to the present invention. FIG. 25 is a front view of an upstream block portion having a forming portion. 26 is a plan view of the upstream block portion shown in FIG. FIG. 27 is a front view showing a feed roller, a forming roller, and a guide roller. 28 (A) to 28 (C) are views showing a DD section, an FF section, and an HH section in FIG. 27. FIG. 29 is a plan view illustrating a feed roller, a forming roller, a guide roller, and a strip-shaped workpiece passing through them. 30A and 30B are views showing the EE cross section and the GG cross section of FIG. FIG. 31A to FIG. 31E are diagrams showing an example of forming for increasing the cross-sectional secondary moment of the belt-like workpiece. 32 is a diagram showing a cross section taken along line II shown in FIG. 15 and a cross section taken along line JJ shown in FIG. FIG. 33 is a diagram illustrating an example of cutting the end portion of the belt-like workpiece. FIG. 34 is an explanatory view showing a material picking situation of a long plate product from a wide rolled material large plate. 35 (A) to 35 (D) are diagrams showing various deformations that occur in the long plate-like product due to factors during material processing. FIG. 36 is a view showing the HH cross section of FIG. 27 in which the forming roller is changed to a combination of a flat roll and a relief grooved roll.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The embodiments described below do not unduly limit the contents of the present invention described in the claims. Also, not all of the configurations described below are essential constituent requirements of the present invention.

1. Cold-working method for strip-shaped workpiece Hereinafter, with reference to FIGS. 1 to 10, an elongated and long length in which the aspect ratio (the ratio of the length and width of a long plate-like product) according to the present invention exceeds 30 It is possible to take a large number of 10 to 20 long plate-like products, for example, a long plate-like product having a width of about 14 mm and a length of about 420 to 1200 mm (aspect ratio: 30 to 85) by one correction process. An embodiment of a cold method for an extremely long strip-shaped workpiece will be described.

1.1. Initial Marking Step FIG. 1 is a diagram showing an initial marking step. The strip-shaped workpiece 10 is made of a metal such as an aluminum alloy A3004-H14 which is an aluminum-magnesium alloy, but is not limited thereto. The strip-shaped workpiece 10 is rolled with a wide width so that the plate thickness is, for example, 1.3 mm, and then slitted (sheared) on both sides so that the width is, for example, 14.0 mm by a slitting machine (not shown). ) And processed into a strip shape, and then wound into a coil by a recoiler (not shown), unwound from an uncoiler 210 described later, and supplied to the cold working apparatus 100.

  A cold working apparatus 100 schematically illustrated in FIG. 1 includes a detection unit 110, a cutting unit 120, and a first clamping unit in order from the downstream side (left side in FIG. 1) in the conveyance direction A along the longitudinal direction of the strip-shaped workpiece 10. 130, length measuring roller (length measuring section in a broad sense) 140, four-wheel drive roller (conveyance section, all-wheel drive roller in a broad sense) 150, marking applying section 160, second clamp section 170 and feed roller (in a broad sense) Transport section) 180 and the like.

  In the initial marking step shown in FIG. 1, the belt-like workpiece 10 is conveyed by the feeding roller 180, and the feeding roller 180 is stopped after the conveyance leading end portion 11 </ b> A of the belt-like workpiece 10 passes through the marking applying portion 160. This stop position control does not require high accuracy and may be manually stopped by visual observation.

  FIG. 1 shows a marking application operation in which the marking application unit 160 is driven. For example, a piercing hole (a marking unit in a broad sense) 11a is formed in the transport tip part 11A. At this time, the belt-like workpiece 10 can be clamped by the second clamp portion 170 at least while the piercing hole 11a is formed.

1.2. Marking Part Detection / Positioning Step The belt-like workpiece 10 on which the marking part 11a is formed is sent to the destination by re-driving the feed roller 180. When the marking unit 11a of the belt-like workpiece 10 is detected by the detection unit 110, the feed roller 180 is stopped. Thereby, the strip-shaped workpiece 10 is positioned with reference to the marking portion 11 a of the strip-shaped workpiece 10. At this time, at the position shown in FIG. 2, the first clamp unit 130 may clamp the belt-like workpiece 10 and fix the position of at least the conveyance tip portion 11 </ b> A side of the belt-like workpiece 10. Here, the first clamp part 130 can include a fixed clamper (fixed part) 131 and a movable clamper (pressing part) 132 that are arranged to face each other with the belt-like workpiece 10 interposed therebetween. In the clamped state, the pressing part 132 is pressed down and the belt-like workpiece 10 is clamped between the fixing part 131 and the pressing part 132.

  In the initial marking step shown in FIG. 1, a pierce hole (marking portion in a broad sense) 11 a is formed at a position that is in a fixed positional relationship with the second clamping region where the belt-like workpiece 10 is clamped by the second clamping portion 170. Detecting the marking unit 11a by the detection unit 110 in FIG. 2 is equivalent to detecting the first clamp region in which the belt-like workpiece 10 is clamped by the first clamp unit 130 having a fixed positional relationship with the detection unit 110. It is. Accordingly, if the positional relationship of the marking applying unit 160 with respect to the second clamp unit 170 and the detection positional relationship of the detection unit 110 with respect to the first clamp unit 130 are matched, the second clamp clamped by the second clamp unit 170. The region can be clamped by the first clamp unit 130 by the subsequent conveyance of the belt-like workpiece 10.

1.3. Clamping process (first process)
FIG. 3 shows that the belt-like workpiece 10 is firmly clamped by the first and second clamp portions 130 and 170 by a tension / release drive unit (hydraulic drive device) described later at a position spaced apart in the longitudinal direction of the belt-like workpiece 10. The 1st process is shown. Here, the second clamp part 170 can also include a fixed part (fixed clamper) 171 and a pressing part (movable clamper) 172 that are arranged to face each other with the belt-like workpiece 10 interposed therebetween. In the clamped state, the pressing portion 172 is pressed down and the belt-like workpiece 10 is firmly clamped between the fixing portion 171 and the pressing portion 172. As shown in FIG. 3 , the length of the first clamp region of the belt-like workpiece 10 clamped by the first clamp unit 130 is L _131, and the length of the transport tip portion 11A downstream from the first clamp region is L. _11A . Note that the cross-hatched portion of the belt-like workpiece 10 in FIG. 3 indicates a region where compression residual strain is generated by being firmly clamped by the first and second clamp portions 130 and 170.

1.4. Tensile (plastic zone) process (second process)
FIG. 4 shows the band-like workpiece 10 between the first and second clamp portions 130 and 170 by moving the first and second clamp portions 130 and 170 firmly clamping the belt-like workpiece 10 relatively along the longitudinal direction. The 2nd process of giving the tensile force F1 and extending to a plastic region is shown. In the present embodiment, the tensile force F <b> 1 is applied to the belt-like workpiece 10 by moving the second clamp portion 170 on the upstream side in the conveyance direction A in the direction B opposite to the conveyance direction A. Here, if the length of the strip-shaped workpiece 10 between the first and second clamp portions 130 and 170 in the first step shown in FIG. 3 is L, the first and second clamps in the second step shown in FIG. The belt-like workpiece 10 having a length L between the parts is extended to a length (L + ΔL1).

  FIG. 5 is a diagram showing the load-elongation characteristics of the belt-like workpiece 10. When a tensile load is applied to the belt-like workpiece 10, initially, elongation occurs in the elastic range. In the elastic range, when the action of the load is released, the elongation returns to zero. In the present embodiment, the elongation ΔL1 belongs to the plastic range. The elongation (100 × ΔL1 / L) is, for example, 0.5% to 2%, and more preferably 0.5% to 1.5%. Since the elongation rate in the elastic range is about 0.25% from FIG. 5, for example, the lower limit of the elongation rate in the plastic range exceeding the elastic range is 0.5%. The elongation to break is 6.4 to 6.7%. When the elongation rate exceeds 2%, the Luders line is easily noticeable even in a range where breakage does not occur, and the thickness and width are also reduced, making it difficult to ensure product planning dimensions. If the elongation is 0.5% to 2%, the decrease in thickness and width is on the order of 1/100 mm or less. In this embodiment, L = 10 m, ΔL1 = 10 cm, and elongation rate (100 × ΔL1 / L) = 1%.

1.5. Tension release (elastic recovery) process (third process)
FIG. 6 shows that the tensile force F1 applied to the strip-shaped workpiece 10 between the first and second clamp portions 130 and 170 is released, and the plastic elongation generated in the strip-shaped workpiece 10 between the first and second clamp portions 130 and 170 ( A third step of elastically recovering a part of ΔL1) is shown. F2 in FIG. 6 is an elastic recovery force generated from the belt-like workpiece 10. In the present embodiment, since the first clamp part 130 is fixed and the second clamp part 170 is movable, the second clamp part 170 is moved back by the elastic recovery force F2. As a result, in the third step, the belt-like workpiece 10 between the first and second clamp portions 130 and 170 can be returned to the length (L + ΔL2) (where ΔL1>ΔL2> 0).

  As shown in FIG. 5, when the load is released after extending to the plastic range, the elongation elastically recovers with an inclination substantially equal to the elastic range. When the elongation rate (100 × ΔL1 / L) in the second step is, for example, 0.5% to 2%, the permanent elongation rate (100 × ΔL2 / L) obtained in the third step is, for example, 0.15 to 1.6%. That is, in the third step, the elongation ΔL1 in the plastic range can be elastically recovered by 0.35 to 0.4%, for example, to obtain the permanent elongation ΔL2. In this embodiment, after the belt-like workpiece 10 of L = 10 m is pulled at 1% elongation in the second step with ΔL1 = 10 cm, it recovers by 4 cm due to the elastic recovery in the third step and becomes ΔL2 = 6 cm. Permanent elongation (100 × ΔL2 / L) = 0.6%.

  By applying a tensile force that reaches the plastic region over the entire length (L) between the first and second clamp portions 130 and 170 of the belt-like workpiece 10, the machining history up to that time for the belt-like workpiece 10 is almost canceled. Plastic strain aligned in the direction is uniformly formed on the belt-like workpiece 10. As a result, non-uniform internal residual stress generated during rolling and non-uniform and unbalanced internal residual stress generated on both sides in the width direction during slit processing (shear processing) are almost constant in each part. There is almost no sheath imbalance. As a result, deformation including camber, warpage, and twist (swell) generated during rolling and / or slit processing (shear processing) for width dimension processing is corrected, and both the length direction and the width direction become straight. The belt-like workpiece 10 in which the camber amount C per 2 m length shown in FIG. 35C is C = 1.6 mm is reduced to C = 0.92 mm which can be ignored in practice when the elongation rate is 0.5%. When the elongation percentage was 0.75 to 2%, correction was possible up to C = 0. Further, it is expected that the belt-like workpiece 10 is work-hardened by plastic deformation to improve the hardness.

Further, as shown in FIG. 6, after the third step is finished, the marking applying unit 160 is driven, and the second marking unit 11 b is formed on the belt-like workpiece 10. In the operations from the second step to the third step, the clamping operation by the tension / release driving unit described later in the first and second clamping units 130 and 170 in the first step is continuously performed. Clamp release at the first and second clamp portions 130 and 170 is preferably performed after the marking portion 11b is applied. This is because the marking portion 11b serving as a reference position can be provided in a state in which the correction processing state is maintained. However, the marking portion 11b may be provided after the clamp is released by the first and second clamp portions 130 and 170. L ₁₆₀ shown in FIG. 6 indicates the length of the piercing allowance region including the marking portion 11b.

1.6. Processing Step to Long Plate Product FIGS. 7 to 10 show a processing step to the long plate product. In FIG. 7, first, the belt-like workpiece 10 is conveyed such that the length of the conveyance tip portion 11 </ b> A removed from the belt-like workpiece 10 is located downstream of the cutting portion 120. At this time, the conveyance drive of the belt-like workpiece 10 can be performed by the four-wheel drive roller 150. By the four-wheel drive system, the belt-like workpiece 10 is accurately supplied without meandering and slipping. The feed amount of the belt-like workpiece 10 can be acquired from the rotation amount by which the length measuring roller 140 is rotated by the belt-like workpiece 10. When the predetermined feed amount is measured by the length measuring roller 140, the driving of the four-wheel drive roller 150 is stopped.

Here, the length Ls of the transport tip portion 11A shown in FIG. 7 includes the formation region L _11A of the marking portion 11a, the total region of the first clamp region L ₁₃₁ by the first clamp portion 130, and the margin. On the upstream side of the length Ls of the transport tip portion 11A shown in FIG. 7, the length L + ΔL2 of the belt-like workpiece 10 corrected by plastic working continues.

Next, as shown in FIG. 8, the region including the conveyance tip portion 11 </ b> A and the first clamp region L ₁₃₁ is separated from the strip-shaped workpiece 10 by the cutting portion 120. At this time, the belt-like workpiece 10 can be clamped by the first clamp part 130 at least while the cutting part 120 is cutting the transport tip part 11A, but the second clamp is applied from the rear end of the corrected length L + ΔL2. The distance to 170 is the length of the first clamp region L ₁₃₁ .

  By the cutting process shown in FIG. 8, the region of the length L + ΔL2 on the upstream side of the belt-like workpiece 10 is only the region corrected by plastic working. The long plate-like product 20 (see FIG. 9) is processed using this region of length L + ΔL2. Here, the length of the long plate-like product 20 shown in FIG. Then, L + ΔL2 ≧ Lp × n (where n is a natural number) is established.

  n = 1, that is, one long plate-like product 20 may be taken from the strip-shaped workpiece 10 having a length L. However, it is more preferable that a plurality of long plate-like products 20 are taken from the strip-like workpiece 10 having a length L, where n is a plurality. Although this reason is mentioned later, FIGS. 9-10 has shown the example which takes multiple elongate plate-shaped products 20 from the strip | belt-shaped workpiece | work 10 of length L. FIG.

In FIG. 9, the strip-shaped workpiece 10 is conveyed so that the length Lp of the first long plate-shaped product 20 separated from the strip-shaped workpiece 10 is positioned downstream of the cutting unit 120. At this time, the conveyance drive of the strip-shaped workpiece 10 can be performed by the four-wheel drive roller 150, and the feed amount of the strip-shaped workpiece 10 can be acquired from the rotation amount of the length measuring roller 140. After being transported by the length Lp of the long plate-shaped product 20, it is stopped, and the long plate-shaped product 20 is cut and separated from the strip-shaped workpiece 10 by the cutting unit 120. At this time, the length of the corrected portion of the belt-like workpiece 10 is L + ΔL2-Lp, and the distance from the rear end to the second clamp 170 is Lp + L ₁₃₁ .

  Thereafter, the operation of FIG. 9 is repeatedly performed, and FIG. 10 shows the operation of separating the last long plate-shaped product 20 from the strip-shaped workpiece 10 having the length L + ΔL2. The control unit (not shown) of the cold working apparatus 100 counts up every time the cutting unit 120 operates as shown in FIGS. 9 to 10, and the number of the long plate-like products 20 set in advance is counted. It is determined whether or not n has been reached. When the count value n is reached by the cutting operation shown in FIG. 10, the fourth step is finished. This completes the first cycle. In addition, according to the situation shown in FIG. 2, you may complete | finish a 1st cycle because the detection part 110 detected the marking part 11b.

  When the 4th process in the 1st cycle is completed, it shifts to the 2nd cycle. In the second cycle, the operations of FIGS. 2 to 4 and FIGS. 6 to 10 are performed in the same manner as the first cycle except for the initial step of FIG. 1, and thereafter the cycle operation is performed as long as the strip-shaped workpiece 10 remains. Is repeated. Here, the operation itself of FIG. 2 performed in the second cycle is substantially the same as that in the first cycle, and the belt-like workpiece 10 is moved until the second marking unit 11b is detected by the detection unit 110. Sent to the other side. At this time, when an end material having a length of [L + ΔL2− (n × Lp)] is generated, the end material is transported including the length of the end material.

  As mentioned above, although one Embodiment of the method of this invention was described, it is not limited to this. For example, considering the versatility, the length Lp of the long plate-like product 20 is various. Therefore, it is preferable to perform the first to fourth steps by changing the distance L between the first and second clamp portions 130 and 170. In the cold working apparatus described below, the implementation of the first to fourth steps will be described in more detail based on the specific configuration, including changing the distance L between the first and second clamp portions 130 and 170. To do. Moreover, although the material of the strip | belt-shaped workpiece | work 10 demonstrated JIS H4000 aluminum plate which is an aluminum-magnesium type alloy, and aluminum alloy A3004-H14 of an aluminum alloy plate as a raw material, it is not limited to this, The elongation rate at the time of a fracture | rupture Is a non-ferrous metal having characteristics of about 8% or more, A1000, A3000, A4000, A5000, A6000 aluminum alloy or JIS H 3100 copper and copper alloy plates excluding A2000 and A7000 of the standard And oxygen-free copper C1020, tough pitch copper C1100, phosphorous deoxidized copper C1201, C1220, C1221, and copper alloys, etc. It can be done.

2. FIG. 11 is a front view schematically showing the entire apparatus according to the embodiment of the present invention. In FIG. 11, a workpiece supply device 200 is connected to the upstream side of the cold working apparatus 100 shown in FIG. In addition, the cold working apparatus 100 includes an upstream block unit 300, a downstream block unit 400, and a transport table 500 disposed between the upstream and downstream block units 300, 400.

2.1. Work Supply Device The work supply device 200 can include an uncoiler (a supply unit in a broad sense) 210, a flat roller 220, and a buffer unit 230.

  The uncoiler 210 is rotationally driven in the direction of arrow B in FIG. 11 by a motor (not shown), and supplies the belt-like workpiece 10 wound in a coil shape while uncoiling. As illustrated in FIG. 12, the flat roller 220 includes an upper roller 221 and a lower roller 222 that are in rolling contact with a predetermined pressure. At least one of the upper roller 221 and the lower roller 222 is rotationally driven, and the belt-like workpiece 10 is sandwiched and supplied between the upper roller 221 and the lower roller 222. In this embodiment, the lower roller 222 is rotationally driven, and the upper roller 221 is pressed against the belt-like workpiece 10 that is driven and conveyed by the lower roller 222 during conveyance. Therefore, the upper roller 221 is disposed so as to be able to contact and separate from the lower roller 222 by the drive cylinder 223. The upper roller 221 and the lower roller 222 are formed of high-strength die steel such as SKD with high rigidity, and the warp S1 viewed from the end in the longitudinal direction is flattened as shown in FIG. To be corrected.

  As shown in FIG. 12, the buffer unit 230 includes a dancer roller 233 attached to the free end of an arm 232 that is rotatably supported at a fulcrum 231. The dancer roller 233 is configured so that the tension of the belt-like workpiece 10 or the arm 232 and the dancer roller 233 is adjusted when the workpiece supply speed at the upstream decoiler 210 and the workpiece conveyance speed at the cold working apparatus 100 on the downstream side do not match. It swings in the direction of arrow C due to its own weight. Thereby, the belt-like workpiece 10 in the middle of supply can be bent and buffered as shown in FIG. In addition, a motor (not shown) that drives the uncoiler 210 may be controlled based on the height position of the dancer roller 233. For example, it is possible to provide a slider (current controller) that changes the resistance value according to the height position of the dancer roller 233 and controls the current supplied to the motor. If the position of the dancer roller 233 is low, the current decreases and the work supply speed in the uncoiler 210 becomes slow. In this way, it can prevent that the strip | belt-shaped workpiece | work 10 and the dancer roller 233 contact a floor surface. For example, the position of the dancer roller 233 may be detected optically to control the motor.

2.2. Upstream Block Part of Cold Working Apparatus FIGS. 13 and 14 are a plan view and a front view of the upstream block part 300 of the cold working apparatus 100 shown in FIG. The upstream block unit 300 is configured by arranging a roller leveler 310, a feed roller 180, a second clamp unit 170, and a marking applying unit 160 in order from the upstream side in the transport direction A on the base 301.

2.2.1. Roller leveler The roller leveler 310 is provided with a pair of rollers 311 and 312 arranged above and below the conveyance path of the belt-like workpiece 10, and a plurality of pairs of rollers are arranged in a staggered manner in a side view. In this respect, the roller leveler 310 has the same structure as that of Patent Document 4, but is different from Patent Document 4 in that it is non-heated and cold-processes the belt-like workpiece 10. The roller leveler 310 corrects the warp S1 viewed from the end in the longitudinal direction as shown in FIG. 35A and the twist (swell) M shown in FIG. However, these deformations S1 and M are not completely eliminated unless the first to third steps are performed and the plastic region is not pulled.

  Further, the belt-like workpiece 10 unwound from the uncoiler 210 has a winding hook. Therefore, at least a part of the curl is removed by the roller leveler 310 so that the belt-like workpiece 10 can be reliably passed (bited) into the feed roller 180.

2.2.2. Feed Roller The feed roller 180 includes an upper roller 181 and a lower roller 182 that are in rolling contact with a predetermined pressure. At least one of the upper roller 181 and the lower roller 182 is rotationally driven, and the belt-like workpiece 10 is sandwiched between the upper roller 181 and the lower roller 182 to be conveyed and supplied. In this embodiment, the lower roller 182 is rotationally driven, and the upper roller 181 is pressed so as to sandwich the belt-like workpiece 10 that is simultaneously driven with the lower roller 182 during conveyance. For this purpose, the upper roller 181 is disposed so as to be able to contact and separate from the lower roller 182 by the drive cylinder 183.

2.2.3. Second Clamp Unit and Tension / Release Drive Unit The second clamp unit 170 is placed on the base board 320 as shown in FIGS. 14 and 15. The base board 320 is provided with, for example, a hydraulic drive device (linear drive unit in a broad sense) 321 as a tension / release drive unit. The hydraulic drive device 321 has a rod 321B that is driven back and forth by a hydraulic cylinder 321A. A movable platen 323 connected to the rod 321B is provided so as to be movable along two linear guides 322 shown in FIG. When the second step shown in FIG. 4 is performed, the hydraulic drive device 321 supplies oil to the first oil chamber of the hydraulic cylinder 321 </ b> A and applies a tensile force F <b> 1 to the second clamp unit 170, The unit 170 is moved from the initial position by ΔL1. When the third step shown in FIG. 5 is performed, the oil is discharged from the first oil chamber of the hydraulic cylinder 321A, and the tensile force F1 shown in FIG. 4 is released. Thereby, the belt-like workpiece 10 is elastically recovered and the second clamp part 170 is returned by (ΔL1−ΔL2). Further, after the clamping force at the first and second clamp parts 130 and 170 is released, oil is supplied to the second oil chamber of the hydraulic cylinder 321A, and the second clamp part 170 is returned by ΔL2, and then the initial stage Return to position. The return time may be after the end of the first cycle as shown in FIG.

  As shown in FIG. 15, the second clamp part 170 has a movable clamper (second pressing part) 172 that is pressed against the fixed clamper 171 fixed to the movable platen 323. The belt-like workpiece 10 is clamped in a region (second clamp region) between the movable clamper 172 and the fixed clamper 171. Inside the movable clamper 172 and the fixed clamper 171, a biasing member 324 such as a compression coil spring is provided at a position where it does not interfere with the transport path of the belt-like workpiece 10 between the movable clamper 172 and the fixed clamper 171. The clamper 172 is biased to move upward.

  A hydraulic drive device 331 for applying a pressing force (first pressing force) to the movable clamper 172 and a toggle mechanism 340 are mounted on a mounting plate 330 fixed above the movable plate 323. The hydraulic drive device 331 includes a rod 331B that is driven back and forth by a hydraulic cylinder 331A. The hydraulic cylinder 331 </ b> A is swingably supported by the fulcrum shaft 342 with respect to the mounting plate 330. The toggle mechanism 340 includes a first link 341 and a second link 345. One end of the first link 341 is connected to the rod 331B. The first link 341 moves forward and backward while swinging about the fulcrum shaft 342 as a fulcrum integrally with the hydraulic cylinder 331A and the rod 331B. The other end of the first link 341 is rotatably connected to one end of the second link 345 via a fulcrum shaft 343. The second link 345 is rotatably supported by the fulcrum shaft 344. The tensile force of the rod 331 </ b> B is transmitted via the first link 341 to the fulcrum shaft 343 serving as the action point of the second link 345. Accordingly, the second link 345 rotating around the fulcrum shaft 344 is boosted by the lever principle and presses the movable clamper 172 downward at the force point 346. Thereby, the belt-like workpiece 10 is firmly clamped in the region (second clamp region) between the movable clamper 172 and the fixed clamper 171. As a result, over the first to third steps of the cold working method described above in which a strong tensile force acts, the belt-like workpiece 10 is kept firmly and stably clamped by the second clamp part 170 without slipping. Can do. Note that the band-like workpiece 10 (cross-hatched portion in FIG. 3 and subsequent figures) in the region between the movable clamper 172 and the fixed clamper 171 (second clamp region) has a strong clamping force generated by the hydraulic drive device 331 and the toggle mechanism 340. The compression residual strain is generated due to the compression processing at a higher processing rate, and may not be suitable for the long plate product 20.

2.2.4. Marking imparting portion The marking imparting portion 160 has a piercing punch 161 that is punched and driven toward an upward tapered piercing hole 162 formed in the downstream end portion of the fixed clamper 171 as shown in FIG. The piercing punch 161 is fixed to an elevating block 163 supported so as to be elevable along the movable clamper 172, for example. An urging member 164 such as a compression coil spring is disposed on the elevating block 163, and the lower end of the urging member 164 is in contact with the head of a bolt 172 A fixed to the movable clamper 172. The urging member 164 functions as a floating spring that urges the lifting block 163 to move upward with respect to the movable clamper 172. As the reaction force, the urging member 164 moves and urges the movable clamper 172 downward. However, the downward biasing force of the biasing member 164 is weaker than the total upward biasing force of the biasing members 324. Therefore, unless a pressing external force is applied to the movable clamper 172 or the lifting block 163, the movable clamper 172 is separated from the fixed clamper 171 by the total biasing force of the plurality of biasing members 324.

  An air driving device 350 that applies a pressing force (second pressing force) to the elevating block 163 is mounted on and attached to the mounting plate 330. The air driving device 350 has a rod 350B that is driven back and forth by an air cylinder 350A. Here, when the rod 350B is retracted, a gap G is secured between the lower end of the rod 350B and the upper end of the elevating block 163. Thereby, in the stroke range (corresponding to the gap G) of the initial first period of the rod 350B driven forward by the air cylinder 350A, the rod 350B idles without pressing the lifting block 163 and is idle. The speed is sufficiently increased in between. In the stroke range of the second period of the rod 350B, the sufficiently accelerated rod 350B comes into contact with the elevating block 163 at a high speed, and the piercing punch 161 is instantaneously pushed down at a high speed. Marking portions) 11a and 11b can be formed by drilling.

  In the stroke range of the rod 350B in the second period, the movable clamper 172 is pushed down against the urging force of the plurality of urging members 324 through the bolts 172A while the urging member 164 of the lifting block 163 is compressed. Thereby, the strip-shaped workpiece 10 can be clamped before the piercing is formed and during the piercing. The clamping force in this case does not need to be a strong clamping force in the first to third steps described above. Therefore, it is not necessary to drive the hydraulic drive device 331 that applies the first pressing force, and the belt-like workpiece 10 is formed when the marking portion is formed by using the second pressing force of the air driving device 350 that is a driving force for marking. Can be clamped. In addition, while the movable clamper 172 is pushed down by the hydraulic drive device 331 and the belt-like workpiece 10 is clamped, the air drive device 350 may be driven to give the marking portion.

2.2.5. Clamp Position Adjusting Mechanism A ball screw nut portion (to be screwed onto the ball screw shaft 360 shown in FIG. 13 is mounted on the base board 320 shown in FIGS. 14 and 15 on which the above-described marking applying portion 160 and second clamp portion 170 are mounted. (Not shown) is fixed. Therefore, the base board 320 can be moved along the longitudinal direction of the ball screw shaft 360 by rotating the ball screw shaft 360 with a handle or the like (not shown). FIG. 14 shows that the base board 320, the tubes and wirings 370 connected to the hydraulic drive device 321 and the like can be moved from the position indicated by the solid line to the position indicated by the alternate long and short dash line. In this embodiment, the moving stroke of the base board 320 is secured about 750 mm.

  By moving the base board 320, the distance (distance L shown in FIG. 3 etc.) between the first and second clamp portions 130 and 170 shown in FIG. 11 can be varied. In other words, the second clamp position can be adjusted by moving the base board 320. In this embodiment, the clamp position is adjusted by the base board 320, the ball screw shaft 360, the ball screw nut portion (not shown), the handle (not shown), the linear movement guide mechanism (not shown) of the base board 320, and the like. The mechanism is configured. By making the distance L variable, the length Lp and the number n of the long plate-like products 20 can be adjusted to an appropriate length L that satisfies L> n × Lp. Further, the length [L + ΔL2− (n × Lp)] of the end material generated by processing the n long plate-shaped products 20 can be shortened. In addition, the clamp position adjustment mechanism should just be what moves the 1st, 2nd clamp parts 130 and 170 relatively.

Here, the length of the belt-like workpiece 10 after the straightening process (first to third steps) from which n long plate-like products 20 are obtained is (L + ΔL2). The original length L of the strip-shaped workpiece before the straightening process is extended by ΔL2 by the straightening process, and the length of the end material having the length Ls with respect to the n long plate-like products 20 becomes a loss (however, Ls = L _11A + L ₁₃₁ , L _11A = L ₁₆₀ , and L ₁₃₁ = L ₁₇₁ ). If the loss rate is defined as 100 × (Ls−ΔL2) / (L + ΔL2), the loss rate can be set to <1.4%. For example, if L = 10 m and ΔL2 = 6 cm, the loss rate is 1.36% when Ls = 197 mm, the loss rate is 1.2% when Ls = 183 mm, the loss rate is 1.2% when Ls = 162 mm, and Ls = At 141 mm, the loss rate is 0.8%.

2.3. Downstream Block Part FIGS. 16 and 17 are a plan view and a front view of the downstream block part 400 of the cold working apparatus 100 shown in FIG. The downstream block unit 400 includes a four-wheel drive roller 150, a length measuring roller 140, a first clamp unit 130, a cutting unit 120, and a detection unit 110 in order from the upstream side in the transport direction A on the base 401. It is configured.

2.3.1. Four-wheel Drive Roller The four-wheel drive roller 150 includes a pair of upper roller 151 and lower roller 152 disposed on the upstream side, and preferably a pair of upper roller 153 and lower roller 154 disposed on the downstream side. By using the four rollers 151 to 154 as, for example, all-wheel drive rollers driven by a single drive source 157, the belt-like workpiece 10 is accurately supplied without meandering and slipping as described above. In the present embodiment, the upper rollers 151 and 153 are brought into pressure contact with the lower rollers 152 and 154 via the belt-shaped workpiece 10 during conveyance. For this purpose, the upper rollers 151 and 153 are arranged so as to be able to contact and separate from the lower rollers 152 and 154 by the drive cylinders 155 and 156.

2.3.2. Length measuring roller The feed amount of the belt-like workpiece 10 for cutting to the length of the long plate-like product 20 is obtained from the rotation amount rotated by the belt-like workpiece 10 with which the length measuring roller 140 is in contact. The length measuring roller 140 includes an upper roller 141 and a lower roller 142. In the present embodiment, the upper roller 141 is pressed against the lower roller 142 via the belt-like workpiece 10 during length measurement. Therefore, the upper roller 141 is disposed so as to be able to contact and separate from the lower roller 142 by the drive cylinder 143. When the predetermined feed amount is measured by the length measuring roller 140, the driving of the four-wheel drive roller 150 is controlled to stop.

2.3.3. First Clamp Unit The first clamp unit 130 may have the same configuration as the second clamp unit 170 except that the base board 320 of the second clamp unit 170 is movable. That is, in the first clamp unit 130, the base board 410 is fixed to the base 401 as shown in FIG. 17, and the movable board 320, the hydraulic drive device 321, the linear guide 322, and the ball screw as shown in FIGS. The shaft 360 or the like is not provided in the downstream block unit 400.

  The 1st clamp part 130 is demonstrated with reference to FIG. In addition, about the member which has the same function as the 2nd clamp part 170 shown in FIGS. 13-15 among the members shown in FIG. 18, the same code | symbol is attached | subjected and detailed description is abbreviate | omitted. As shown in FIG. 18, the first clamp part 130 is provided with a movable clamper 132 that is pressed against the fixed clamper 131 fixed to the base board 410. The pressing drive mechanism of the movable clamper 132 is configured in the same manner as the second clamp unit 170, and the hydraulic drive device 331 and the toggle mechanism 340 are also provided in the first clamp unit 130. Therefore, the hydraulic drive device 331 is driven to apply a tensile force to the rod 331B, and the first clamp unit 130 also applies a strong pressing force (first pressing force) to the movable clamper 132, and is fixed to the movable clamper 132. The belt-like workpiece 10 can be firmly clamped in the region between the clamper 131 (first clamp region). As a result, over the first to third steps of the cold working method described above in which a strong tensile force acts, the belt-like workpiece 10 can be firmly and stably clamped by the first clamp portion 130 without slipping. Can do. Note that the band-like workpiece 10 (cross-hatched portion in FIG. 3 and subsequent figures) in the region between the movable clamper 132 and the fixed clamper 131 (first clamp region) is a strong clamping force generated by the hydraulic drive device 331 and the toggle mechanism 340 The compression residual strain is generated due to the compression processing at a higher processing rate, and may not be suitable for the long plate product 20. When the drive of the hydraulic drive device 331 is released, the movable clamper 132 can be separated from the fixed clamper 131 by the biasing member 324 in the first clamp unit 130 as in the second clamp unit 170. Note that the fixed clamper 131 is not provided with the piercing hole 162 shown in FIG. 15 and that the rear end edge portion forms a blade portion for the strip-shaped workpiece 10 with a cutting blade 121 described later. 2 is different from the fixed clamper 171 of the clamp part 170.

2.3.4. Cutting Unit The cutting unit 120 shown in FIG. 18 is also arranged adjacent to the downstream side of the first clamp unit 130 in the same manner as the marking applying unit 160 arranged adjacent to the downstream side of the second clamp unit 170. The cutting unit 120 has the same configuration as the marking applying unit 160 except for the following two points. Therefore, among members shown in FIG. 18, members having the same functions as those of the marking applying unit 160 shown in FIGS. 13 to 15 are assigned the same reference numerals and detailed description thereof is omitted. One of the differences is that instead of the piercing punch 161 fixed to the lifting block 163 of the marking applying unit 160, for example, a cutting blade 121 having a sharp tip is provided. Another difference is that a member that interferes with the cutting blade 121 is not disposed in the movement range of the cutting blade 121.

  Therefore, also in the cutting part 120, the rod 350B does not press the lifting block 163 in the stroke range (corresponding to the gap G) of the initial first period of the rod 350B driven forward by the air cylinder 350A shown in FIG. The car will run and the speed will be increased sufficiently while the car is running. In the stroke range of the second period of the rod 350B, the sufficiently accelerated rod 350B abuts on the lifting block 163 at a high speed and simultaneously pushes down the cutting blade 121 at a high speed. Can be cut. Therefore, the cut end of the belt-like workpiece 10 can be kept sharp.

  Similarly to the marking applying unit 160, the cutting unit 120 also uses the second pressing force of the air driving device 350, which is a driving force for cutting, from before the cutting to during the cutting, and the biasing member 164. And the movable clamper 132 can be pressed via the bolt 132A to clamp the belt-like workpiece 10. In this case, the belt-like workpiece 10 in the region between the movable clamper 132 and the fixed clamper 131 (first clamp region) is not subjected to compression processing at a high processing rate because no strong clamping force is generated. Since the area hardly undergoes compressive residual strain, it is suitable for the long plate product 20 and is not scrapped.

2.3.5. Detection Unit The detection unit 110 illustrated in FIG. 17 detects, for example, optically the marking units 11 a and 11 b formed on the belt-like workpiece 10 without contacting the belt-like workpiece 10. The detection unit 110 emits light toward the strip-shaped workpiece 10 and detects the presence or absence of the marking units 11a and 11b based on the amount of reflected light. When the marking portions 11a and 11b are not present, the light is reflected by the metal surface of the strip-shaped workpiece 10, whereas when the marking portions 11a and 11b are present and are, for example, holes, light leaks from the holes and the amount of reflected light is reduced. To do. The detection unit 110 can detect the presence or absence of the marking units 11a and 11b based on the change in the amount of reflected light.

  In addition, as a detection spot of the detection part 110, it is preferable that the positional relationship of a 2nd clamp area | region and a marking part and the positional relationship of a 1st clamp area | region and a detection spot correspond. This is because if the lengths (areas) of the first and second clamp regions are the same, the first clamp region and the second clamp region can be matched. Thereby, the length of the end material can be shortened.

2.4. Conveying Table A conveying table 500 shown in FIG. 11 supports the lower surface of the belt-like workpiece 10 positioned between the upstream block unit 300 and the downstream block unit 400. The conveyance stand 500 prevents the belt-like workpiece 10 from being bent and grounded to the floor surface. On the conveyance surface of the conveyance table 500, processing for reducing the frictional resistance with the belt-like workpiece 10 and equipment such as a driven roller can be provided.

2.5. Shape processing apparatus for long plate-shaped product The fourth step of the cold working method described above is not limited to cutting the long plate-shaped product 20 for each length Lp. The shape processing apparatus can be provided online or offline with the cold processing apparatus 100 shown in FIG.

  FIG.19 and FIG.20 is the top view and front view of the shape processing apparatus 600 of the elongate plate-shaped product 20. FIG. On the base 601, the shape processing apparatus 600 is provided with a first press unit 610 on the upstream side in the transport direction A and a second press unit 620 on the downstream side. The first press unit 610 includes fixed molds 611 and 613 and movable molds 612 and 614. The second press unit 620 also includes fixed molds 621 and 623 and movable molds 622 and 624.

  The first and second press portions 610 and 620 press, for example, both end portions of the long plate-like product 20 having a length Lp into a predetermined shape. An example of the press working is shown in FIGS. 21A and 21B and FIGS. 22A and 22B. 21A and 21B show the processed shape after the first pressing step. In the first step, both ends of the long plate-like product 20 (FIG. 21A shows only one end) are cut so as to change from a dashed outline 20A1 to a solid outline 20A2. At the same time, positioning holes 20B penetrating the front and back surfaces of the long plate-like product 20 are drilled and formed. In this first step, the cross section taken along the line II in FIG. 21A is as shown in FIG.

  In the second step, the processing position of the long plate-like product 20 is positioned with high accuracy using the positioning hole 20B of FIG. 22A, and then the section taken along the line II-II is as shown in FIG. For example, it is curved.

  In the 1st press part 610 shown in FIG.19 and FIG.20, the 1st, 2nd process mentioned above about the one end part of the elongate plate-shaped product 20 is implemented. In the 2nd press part 620, the 1st, 2nd process mentioned above about the other end part of the elongate plate-shaped product 20 is implemented. The distance between the first and second press portions 610 and 620 is variable according to the length Lp of the long plate-like product 20. For this purpose, for example, the first press unit 610 is arranged to be movable along the transport direction A with respect to the base 601. As shown in FIG. 19, a ball screw shaft 630 is provided along the conveyance direction A, and a ball screw nut portion 631 that is screwed to the ball screw shaft 630 is fixed to the first press portion 610. By rotating the ball screw shaft 630 with the handle 640 shown in FIG. 19, the ball screw nut portion 631 moves along the ball screw shaft 630, and the position of the first press portion 610 can be changed.

  FIG. 23 shows an execution procedure of the first and second steps performed in the first press unit 610. In the second press unit 620, pressing is simultaneously performed in the same procedure as the first press unit 610. The long plate-shaped product 20 carried out from the cold processing apparatus 100 is supplied to the shape processing apparatus 600 in-line or offline, and is supplied in the direction of arrow A in FIG. The long plate-like product 20 is held by a handling device (not shown), and is supplied to the position P1 from the transport direction A.

  Thereafter, the long plate-like product 20 is handled and moved from the position P1 to the position P2 in the direction orthogonal to the conveyance direction A. Then, in the position P2, the first step pressing shown in FIGS. 21A and 21B is performed between the fixed mold 611 and the movable mold 612.

  Thereafter, the long plate-like product 20 is handled and moved from the position P2 to the position P3. Then, in the position P3, the press process in the second step shown in FIGS. 22A and 22B is performed between the fixed mold 613 and the movable mold 614. The long plate-like product 20 subjected to the first and second steps is carried out of the shape processing apparatus 600 from position P3 through position P4.

3. Specific Example of Long Plate Product FIG. 24 shows a product example including the long plate product 20. The product shown in FIG. 24 is, for example, a condenser 700 disposed in front of a radiator of an automotive air conditioner. The condenser cools the refrigerant that has absorbed heat and vaporized by cooling the cabin of the automobile and returns it to the liquid state again.

  The capacitor 700 is configured by disposing a radiator core 705 inside a frame formed by a lower header pipe 701, an upper header pipe 702, and two side sheets 703 and 704. Pipes 701A and 702A are connected to the header pipes 701 and 702, respectively, and refrigerant is supplied / discharged. The long plate-like product 20 of the present embodiment is side sheets 703 and 704.

4). Forming part FIG.25 and FIG.26 shows the modification of the upstream block part 300 shown in FIG.11, FIG.13 and FIG.14, and has shown the front view and top view of 300 A of upstream block parts which have the forming part 380. FIG. . The upstream block portion 300A shown in FIGS. 25 and 26 is downstream of the feed roller 180 in the transport direction A and upstream of the second clamp portion 170, and one or a plurality of forming rollers 390A and 390B. Have

  The forming roller 390A includes an upper roller 391A and a lower roller 392A that are rolled by a predetermined pressure (see also FIG. 27). At least one of the upper roller 391A and the lower roller 392A is rotationally driven, and the band-shaped workpiece 10 is sandwiched between the upper roller 391A and the lower roller 392A for forming processing. In this embodiment, the lower roller 392A is rotationally driven, and the upper roller 391A is pressed so as to sandwich the belt-like workpiece 10 that is simultaneously driven with the lower roller 392A during conveyance. For this purpose, the upper roller 391A is disposed so as to be able to contact and separate from the lower roller 392A by the drive cylinder 393A. Similarly, the forming roller 390B has an upper roller 391B, a lower roller 392B, and a drive cylinder 393B.

  The forming unit 380 may further include a pair or a plurality of pairs of guide rollers 394 and 395 that prevent the band-shaped workpiece formed by the forming rollers 390A and 390B from being displaced in the width direction and guide the conveyance. Yes (see also FIG. 27). In the present embodiment, the guide roller 394 is provided between the feed roller 180 and the forming roller 390A, and the guide roller 395 is provided between the forming rollers 390A and 390B. The number of guide rollers and the installation position are not limited to this. Each guide roller is rotatably fixed to each stay (not shown) via a bearing.

  28 (A) to 28 (C) are views showing a DD section, an FF section, and an HH section in FIG. 27. The feed roller 180 shown in FIG. 28 (A) linearly conveys the belt-like workpiece 10 sandwiched between the flat peripheral surfaces of the upper roller 181 and the lower roller 182. On the other hand, the forming roller 390A shown in FIG. 28B includes, for example, an annular ridge portion 391A1 provided on the peripheral surface of the upper roller 391A, and an annular groove portion 392A1 provided on the peripheral surface of the lower roller 392A. Opposite. In the forming roller 390B shown in FIG. 28C, for example, the annular ridge portion 391B1 provided on the peripheral surface of the upper roller 391B and the annular groove portion 392B1 provided on the peripheral surface of the lower roller 392B are opposed to each other. ing. However, the curvature (curvature radius) of the annular protrusion 391B1 and the annular groove 392B1 of the forming roller 390B is the same as the curvature (curvature radius) of the annular protrusion 391A1 and the annular groove 392A1 of the forming roller 390A. Or larger or smaller. Instead of the forming roller 390B, a tension roller 390C shown in FIG. 36 may be used, and the belt-like workpiece 10 may be slightly pulled between the tension roller 390C and the forming roller 390A. Further, as shown in FIG. 36, the tension roller 390C is provided with an upper roll 391C (flat roll) having a flat peripheral surface 391C1 and an annular relief groove 392C1 for the rib portion 10A formed by the forming roller 390A. You may comprise by the roll 392C (roll with a relief groove).

  FIG. 29 is a plan view of the forming rollers 390A and 390B and the guide rollers 394 and 395 and the belt-like workpiece 10 passing therethrough. The belt-like workpiece 10 is formed with a concave rib 10A by passing through the forming roller 390A, and then formed with a concave rib 10B by passing through the forming roller 390B (see also FIGS. 28B and 28C). .

  30A and 30B are views showing the EE cross section and the GG cross section of FIG. As shown in FIGS. 29, 30 (A) and 30 (B), the guide rollers 394 and 395 are configured by a pair of rollers that are in rolling contact with both side edges of the belt-like workpiece 10. Note that any of the guide rollers 394 and 395 is a driven roller that rotates in contact with the belt-like workpiece 10 conveyed by the feed roller 180 and does not necessarily have to be a driving roller.

  Here, the forming unit 380 changes the cross-sectional shape of the strip-shaped workpiece 10 in order to increase the sectional moment of the strip-shaped workpiece 10 before plastic processing by the first and second clamp units 130 and 170 is performed. Is. The cross-sectional secondary moment is an amount representing the difficulty of deformation of the strip-shaped workpiece 10 with respect to the bending moment. By increasing the sectional secondary moment of the strip-shaped workpiece 10 by forming, the cross-section secondary moment of the thin strip-shaped workpiece 10 is increased. Flatness can be improved, and at the same time, bending rigidity can be increased. Here, a radiation fin (not shown) is disposed between one of the side sheets 703 and 704 (elongate product 20) shown in FIG. 24 and the radiator core 705. If the bending rigidity of the long product 20 obtained by cutting the strip-shaped workpiece 10 is high, the pressing force from one of the side sheets 703 and 704 (long product 20) against the radiation fins (not shown) increases. To do. Even if non-uniform internal residual stress is generated in the width direction of the belt-like workpiece 10 during the forming process, the processing history gives a tensile force by the first and second clamp portions 130 and 170 to be performed thereafter. Canceled by plastic working. Thereby, the plastic strain of the belt-like workpiece 10 with improved bending rigidity is aligned in one direction.

  FIG. 31A to FIG. 31E are diagrams showing a forming process example in which the secondary moment of section of the belt-like workpiece 10 is increased. In addition to the processing example of FIG. 31 (A) in which the strip-shaped workpiece 10 is provided with the concave rib 10A (10B), as shown in FIGS. Bending portions 10 </ b> C can be formed at both ends. Alternatively, the belt-like workpiece 10 itself may be curved as shown in FIG. 31D, or a plurality of concave ribs 10A (10B) may be provided on the belt-like workpiece 10 as shown in FIG.

  When the upstream block portion 300A having the forming portion 380 shown in FIGS. 25 and 26 is adopted instead of the upstream block portion 300 shown in FIGS. 13 and 14, it is matched with the shape of the strip-like workpiece 10 having the concave rib 10B. Therefore, it is necessary to change the shape of the clamper that presses the belt-like workpiece 10 on the downstream side of the forming portion 380. 32 is a diagram showing a cross section taken along line II shown in FIG. 15 and a cross section taken along line JJ shown in FIG. The fixed clamper 131 and the movable clamper 132 of the first clamp part 130 and the fixed clamper 171 and the movable clamper 172 of the second clamp part 170 are adapted to the shape of the concave rib 10B from the flat cross-sectional shape shown by the two-dot chain line. The cross-sectional shape is changed to a shape having straight ridges or ridges that are convex or concave.

  In addition, the shape processing apparatus 600 can perform end cutting processing of the end shape shown in FIG. 33 instead of the end cutting processing example of FIG. In FIG. 33, both ends in the longitudinal direction of the long plate-like product 20 in which the concave ribs 10B are formed in the forming portion 380 (only one end is shown in FIG. 33) are changed from the solid outline 20A1 to the dashed outline 20A3. Thus, it is cut into a curved shape (an arc shape is shown in FIG. 33). An outline 20A2 after the cutting process shown in FIG. 21A is the shape of the insertion end portion fitted into the lower header pipe 701 and the upper header pipe 702 of the capacitor 700 shown in FIG. On the other hand, the outline 20A3 after the cutting process shown in FIG. 33 has an end shape arranged along the outer peripheral surfaces of the lower header pipe 701 and the upper header pipe 702 of the capacitor 700 shown in FIG. In FIG. 33, the long plate-like product 20 is shown upside down so that the concave rib 10 </ b> B formed in the forming portion 380 faces the upper surface.

  Although the present embodiment has been described in detail as described above, it will be easily understood by those skilled in the art that many modifications can be made without departing from the novel matters and effects of the present invention. Therefore, all such modifications are included in the scope of the present invention. For example, a term described with a different term having a broader meaning or the same meaning at least once in the specification or the drawings can be replaced with the different term in any part of the specification or the drawings.

  For example, the drive sources of the first and second clamp units 130 and 170 and the tension / release drive unit 321 are not limited to hydraulic pressure, and the drive sources of the cutting unit 120 and the marking applying unit 160 are not limited to air. The marking imparting unit 160 is not limited to one that forms a piercing, but may be a marking unit having another shape, and is not limited to one that shapes the belt-like workpiece 10, but a detection unit that applies ink by inkjet or the like. Any configuration can be used as long as the marking detectable at 110 can be applied. In the case of processing the shape of the belt-like workpiece 10, a laser processing apparatus may be used. In particular, the marking applying unit 160 can apply a marking unit in the second clamp region of the second clamp unit 170. In this case, there is no need to provide the piercing allowance region L160 shown in FIG. 6 outside the second clamp region, and there is an advantage that the length of the end material can be shortened. In order to provide the marking portion in the second clamp region of the second clamp portion 170, for example, a through hole is provided in the second clamp portion 170, and a laser processing apparatus that can perform laser irradiation through the through hole is disposed. it can. In addition, the belt-like workpiece 10 may be fed and moved after the third step, and the marking portion may be applied to the second clamp region by the marking applying portion 160.

  DESCRIPTION OF SYMBOLS 10 Strip-shaped workpiece, 10A, 10B Concave rib, 10C Convex rib, 11A Conveyance tip part, 11a, 11b Marking part, 20 Long plate-shaped product, 100 Cold processing apparatus, 110 Detection part, 120 Cutting part, 121 Cutting blade, 130 1st clamp part, 131 fixed part (fixed clamper), 132 pressing part (movable clamper), 140 length measuring part (length measuring roller), 150 transport part (four-wheel drive roller), 160 marking applying part, 163 lifting block 164 urging member, 170 second clamp part, 171 fixed part (fixed clamper), 172 pressing part (movable clamper), 180 feed roller (conveying part), 200 workpiece supply device, 210 uncoiler (supply part), 220 flat Roller, 230 Buffer section, 300, 300A Upstream block section 310 Leveler roller, 320 Base board, 321 Tension / release drive part (hydraulic drive device), 350A air cylinder, 350B rod, 360 ball screw, 320, 360 Clamp position adjustment mechanism, 380 Forming part, 390A, 390B Forming roller , 394, 395 Guide roller, 400 Downstream block part, 500 Conveying table, A Conveying direction, G gap, L Length of the strip-shaped workpiece between the first and second clamp parts, Lp Length of the long plate product, Ls Length of conveyance tip, ΔL1 Plastic elongation, ΔL2 Permanent elongation after elastic recovery

The present invention relates to a cold working method and equipment of the strip-shaped workpiece, in particular the aspect ratio (length ratio of the length to the width of the elongated plate-like products) and is elongated in excess of 30 long elongated plate-shaped product preferably it is directed to the length of the strip-shaped workpiece that can be multi-cavity.

Accordingly, some embodiments of the present invention provide a strip-like workpiece that can correct deformation such as camber or warping or twisting (swell) in a side view by cold working after slitting or the like on a slitting machine. and to provide a cold working method and equipment.

Claims (28)

A first step of clamping the belt-like workpiece by the first and second clamp portions at a position spaced apart in the longitudinal direction of the belt-like workpiece;
The first and second clamp portions that clamp the belt-like workpiece are relatively moved along the longitudinal direction, and the belt-like workpiece between the first and second clamp portions is plasticized by applying a tensile force. A second step extending to the area;
The third force that releases the tensile force applied to the belt-like workpiece between the first and second clamp portions and elastically recovers a part of the plastic elongation generated in the belt-like workpiece between the first and second clamp portions. Process,
Thereafter, a fourth step of processing the strip-shaped workpiece between the first and second clamp parts into a long plate product,
A method for cold working a strip-shaped workpiece characterized by comprising: In claim 1,
In the second step, the belt-like workpiece having a length L between the first and second clamp portions is extended to a length (L + ΔL1),
In the third step, the strip-shaped workpiece cold working method is characterized in that the strip-shaped workpiece between the first and second clamp portions is returned to a length (L + ΔL2) (where ΔL1>ΔL2> 0). In claim 2,
The belt-like workpiece is transported in the transport direction along the longitudinal direction, and the first to fourth steps are performed in each of the Nth (N is an integer) cycle and the (N + 1) th cycle,
In the second step, with respect to the first clamp portion disposed on the downstream side in the transport direction, the second clamp portion disposed on the upstream side in the transport direction is set in a direction opposite to the transport direction. A cold working method of a strip-shaped workpiece characterized by moving. In claim 3,
In the first step of the Nth cycle and the (N + 1) th cycle, the first clamp part clamps at least a part of the transport tip of the belt-like workpiece,
In the fourth step of the Nth cycle and the (N + 1) th cycle, the belt-shaped workpiece is transported after releasing the clamping force at the first and second clamp portions, and the transport tip is moved from the strip-shaped workpiece. A method for cold working a strip-shaped workpiece, comprising a tip removing step for removing. In claim 4,
The method further comprises a step of detecting the second clamp region of the band-shaped workpiece clamped by the second clamp portion in the first step of the N cycle before the first step of the (N + 1) cycle. And
The second clamp region in the first step of the N cycle overlaps with the first clamp region clamped by the first clamp part in the first step of the (N + 1) cycle. A cold work method for strip-shaped workpieces. In claim 5,
Further including a step of providing a marking portion on the strip-shaped workpiece before the fourth step of the Nth cycle,
Before the first step of the (N + 1) th cycle, the position of the marking portion is detected, the conveyance of the belt-like workpiece is stopped, and the first clamp region in the first clamp portion is set. A cold work method for strip-shaped workpieces. In claim 6,
The method for cold working a strip-shaped workpiece, wherein the transport tip portion removed from the strip-shaped workpiece in the tip removal step includes the clamp region and the marking portion. In claim 7,
The marking part is formed in the second clamp region, and is a method for cold working a strip-shaped workpiece. In any of claims 2 to 8,
When the length of the long plate-like product is Lp, L> Lp × n (n is a natural number),
The fourth step includes a step of separating the strip-shaped workpiece having the length L into n pieces of the long plate-shaped product, wherein the strip-shaped workpiece is cold worked. In any one of Claims 2 thru | or 9.
A step of adjusting the length L between the first and second clamp parts by adjusting the position of at least one of the first and second clamp parts when changing the length of the long plate-like product. A method for cold working a strip-shaped workpiece, further comprising: In any of claims 5 to 8,
When the length of the long plate-like product is Lp, L> Lp × n (n is an integer of 2 or more),
When the length of the conveyance tip portion removed from the belt-like workpiece in the tip removal step is Ls, the belt shape is 100 × (Ls−ΔL2) / (L + ΔL2) <1.4%. Cold working method for workpieces. In any of claims 2 to 11,
A cold working method for a strip-shaped workpiece, wherein the plastic elongation calculated by 100 × ΔL1 / L is 0.5% to 2%. In any one of Claims 1 to 12,
Prior to the first step to the third step, there is further provided a forming step for increasing a cross-sectional secondary moment of the strip-like workpiece. A long plate-like product manufactured by the method according to any one of claims 2 to 12,
A long plate-like product having a permanent elongation calculated from 100 × ΔL2 / L of 0.15% to 1.6%.   15. The long plate-like product according to claim 14, wherein the secondary moment is increased by a convex rib and / or a concave rib formed continuously in the longitudinal direction of the strip-shaped workpiece. Plate product. A transport unit that transports the strip-shaped workpiece in a transport direction along the longitudinal direction of the strip-shaped workpiece;
A first clamp part disposed on the downstream side in the transport direction and clamping the belt-like workpiece;
A second clamp part disposed on the upstream side in the transport direction and clamping the belt-like workpiece;
The first and second clamp portions that clamp the belt-like workpiece are relatively moved along the longitudinal direction, and the belt-like workpiece between the first and second clamp portions is plasticized by applying a tensile force. A tension / release drive unit that extends to a region, releases the tensile force, and elastically recovers a part of the plastic elongation generated in the belt-like workpiece between the first and second clamp units;
A device for cold working a strip-shaped workpiece characterized by comprising: In claim 16,
The tension / release part extends the strip-shaped workpiece having a length L between the first and second clamp portions to a length (L + ΔL1), and then moves the strip-shaped workpiece between the first and second clamp portions. An apparatus for cold-working a strip-shaped workpiece, wherein the apparatus returns to a length (L + ΔL2) (where ΔL1>ΔL2> 0). In claim 17,
The tension / release part moves the second clamp part in a direction opposite to the conveying direction with respect to the first clamp part, and applies the tensile force to the belt-like work. Cold working equipment. In claim 18,
The transport unit is disposed between the first and second clamp units, and an all-wheel drive roller in which a plurality of pairs of drive rollers disposed above and below the belt-shaped workpiece are disposed along the transport direction. A device for cold working of a strip-shaped workpiece characterized by comprising: In claim 18 or 19,
It is arranged downstream of the first clamp part in the transport direction, and cuts and removes the transport tip of the strip-shaped work transported after the clamping force at the first and second clamp parts is released. A cutting portion;
The transporting tip of the belt-like workpiece includes a first clamp region clamped by the first clamp portion and a second clamp region clamped by the second clamp portion. Cold working equipment. In claim 20,
A detection unit for detecting the second clamp region of the belt-like workpiece clamped by the second clamp unit;
The transport roller is driven after the tensile force is released by the tension / release drive unit and after the clamp is released by the first and second clamp units, and is stopped based on the output from the detection unit. A cold work apparatus for a strip-shaped workpiece, wherein the second clamp region and the first clamp region clamped by the first clamp part are overlapped. In claim 21,
A marking imparting portion for imparting a marking portion to the belt-like workpiece in a region having a certain positional relationship with the second clamp region;
The said detection part detects the said marking part, The cold work apparatus of the strip | belt-shaped workpiece | work characterized by the above-mentioned. In claim 22,
The said cold marking apparatus provides the said marking part in the said 2nd clamp area | region, The cold work apparatus of the strip | belt-shaped workpiece | work characterized by the above-mentioned. 24.
When the length of the long plate-like product is Lp, L> Lp × n (n is a natural number), and further includes a length measuring unit for measuring the length Lp of the long plate-like product. ,
The cutting unit cuts the band-shaped workpiece for each length Lp measured by the length measuring unit and separates it into n pieces of the long plate-shaped product. . 25. Any one of claims 17 to 24.
A strip-shaped workpiece further comprising a clamp position adjusting mechanism that adjusts at least one position of the first and second clamp portions to change the length L between the first and second clamp portions. Cold processing equipment. 24.
The first clamp portion includes a pressing portion that is driven by a first pressing force and presses the strip-shaped workpiece in the first clamp region,
The cutting part is
A lifting block that is guided up and down along the side surface of the pressing portion and includes a cutting blade;
An urging member that maintains the elevating block at the upper limit position in the extended state and moves the elevating block and the pressing portion integrally in the compressed state when a second pressing force is applied to the elevating block;
A device for cold working of a strip-shaped workpiece characterized by comprising: In claim 26,
The belt-shaped workpiece cold working apparatus, wherein the cutting portion includes an air cylinder and a rod for generating the second pressing force, and a gap is provided between the rod and the lifting block. In any of claims 16 to 27
A cold working apparatus, further comprising a forming portion that is provided upstream of the second clamp portion in the transport direction and that increases a secondary moment of section of the belt-like workpiece.

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