KR101636414B1 - Sheet shearing method - Google Patents

Abstract

A nonmetal layer (not shown) is formed between the die 2 having the hole 2a for shearing and the punch 3 in order to provide a method of shearing a thin plate which can shear a thin plate with high quality without finishing the clearance by precision machining of the die. Wherein the punch (3) is moved toward the hole (2a) for shearing so as to shear the thin plate (1) by placing the thin plate (1) having at least one punch The relative movement of the punch 3 is stopped at the stage before passing through the thin plate 1 and fitted in the hole 2a for shearing, and the shearing is completed.

Description

{Sheet shearing method}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of shearing a thin plate, which has a plate thickness of approximately 0.5 mm or less and is formed by shearing a thin plate or a metal thin plate laminated on one or both surfaces of a metal layer.

As a method of forming a product with a thin plate, a method of punching (thinning) a thin plate with a die (punch and die) is the most common method.

In this punching method, a workpiece (thin plate) is placed on a die having a punching hole, and the punch disposed above the punching hole is lowered to fit the end of the punch into the punching hole to shear the workpiece. In addition, punches and dies may be vertically inverted to place the punches below the die, and the die may be moved instead of the punches.

For example, in Non-Patent Document 1, there is proposed a method of measuring the thickness of a plate to be processed and a clearance (clearance) between the punch and the die (punching hole) Appropriate relationships are shown. According to this, about 5 to 10% of the thickness of the plate to be processed is a proper clearance.

According to the relationship between the plate thickness and the clearance of the plate to be processed, if the plate thickness of the plate to be processed is 1 mm, the clearance is about 50 to 100 占 퐉. However, if the plate thickness of the material to be processed is, for example, 20 占 퐉, a proper clearance becomes 1 to 2 占 퐉, which requires precision machining of the metal mold, which requires not only a high technology in production but also raises the price.

Another problem arises if the clearance is narrowed to produce a mold and punching. One of them is a reduction in service life due to wear of punches and dies. That is, when the clearance is narrow, the punch and the die are more likely to come into contact with each other in the elastic deformation range, resulting in increased wear. Also, when the punch and the die come into contact with each other and are deformed beyond the elastic deformation range, a problem of chipping also occurs.

Another major problem is the problem of small debris generated in the workpieces due to punching. This problem becomes conspicuous when the workpiece is a laminate of a metal layer and a nonmetal layer. The debris generated in the workpiece is interposed between the punch and the die, requiring a great deal of force in punching or causing the problem that cleaning is frequently required. It can also damage the mold.

The conventional punching method has another problem. That is, if the punching of the workpiece, particularly the metal plate, is carried out, there is a relation with the mold, but the punch is liable to cause adhesion by the workpiece. This adhesion problem can be prevented to some extent by coating punches or dies with ceramics or DLC (diamond-like carbon), but in a metal mold with a narrow clearance, friction caused by sliding between the punch and die is large and only temporary effect can be obtained.

Another problem is the deterioration of the outer edge of the workpiece (product portion) after punching. This is because after the workpiece is punched out, it rubs against the inner surface of the die and continues to rub until it reaches the dead point of the punch and is separated from the die.

As described above, in the conventional shearing by punching, various problems arise especially when the thickness of the plate to be processed is reduced.

Non-Patent Document 1: Akira Hashimoto, " New Press for Pressing and Molding ", Seventh Edition, Japan Daily Newspaper, April 30, 1975, p35

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problem of prior art shearing by punching, and it is an object of the present invention to provide a method of manufacturing a metal plate, which can shear a thin plate with high quality over a long period of time, And it is an object of the present invention to provide a method for shearing a thin plate very favorably at a low cost in both the apparatus and the process.

The inventor of the present invention has conducted researches on the shearing of thin plates. As a result, in the case of a thin plate in which a nonmetal layer is laminated on one surface or both surfaces of a metal layer, in a stage before the punch passes through the thin plate, I found it to be completely sheared.

The present invention has been made based on this understanding, and it is an object of the present invention to provide a method of manufacturing a metal mold, in which a thin plate having a base metal layer laminated on one surface or both surfaces of a metal layer is disposed between a die having a hole for shearing processing and a punch, Wherein the relative movement of the punch is stopped and the shearing is completed at a stage before the punch passes through the thin plate and is fitted into the hole for shearing in the method of shearing the thin plate shearing the thin plate.

As described above, in the present invention, since the punch is not fitted to the die, there is no need to strictly adjust the clearance as in the conventional punching method in which the punch is fitted to the die, and a normal clearance, a zero clearance, It may be. That is, in the present invention, it is not necessary to strictly adjust the clearance by precision machining of the mold (punch and die), so that the mold can be easily manufactured and the manufacturing cost can be reduced.

Further, since the punch is not fitted to the die, the punch does not abrade the die well, and the life of the die also becomes longer. Further, the movement of the member to be processed after shearing is small, and the generation of debris is reduced accordingly. Further, in the conventional method, there is a problem that the metal portion of the contacted workpiece is adhered to the workpiece due to the upward and downward movement of the punch. It is difficult to remove the adhered metal, and if you try to rub or remove it with chemicals, debris will enter the punch, or roughness on the surface will become rough or corroded and the surface will be damaged. In addition, this phenomenon occurs 100 times in long time, and only 5 to 10 times in short, so productivity is remarkably impaired. In the method of the present invention, since the punch can be sheared without directly contacting the metal part in the workpiece, it is possible to prevent the workpiece from adhering to the punch.

Therefore, the state of the shearing can be maintained in a favorable state, so that the thin plate can be sheared with high quality, and it is not necessary to produce a mold in which manufacture is difficult and a clearance of high cost is narrowed to an extreme limit, Do not.

In the art of punching processing, there is known a method of punching a workpiece by first punching the workpiece in one direction and then punching it in the opposite direction without punching the workpiece by a single punching operation (for example, Japanese Unexamined Patent Application Publication No. 2004-167547 and Japanese Unexamined Patent Application Publication No. 2001-300647). The shearing method of the present invention is a method in which the workpiece is completely sheared by one shearing operation, Technology is essentially different.

In the present invention, it is preferable that the punch is stopped at a position which is not less than the thickness of the metal layer and less than the total thickness of the non-metal layer with respect to the thickness of the thin plate. If the position for stopping the punch is less than the thickness of the metal layer, there is a high possibility that the punching of the thin plate is not terminated. On the other hand, if the total thickness of the nonmetal layer is exceeded, chipping of the punch and the die, increase of occurrence of cutting debris, and fusion of the punch and the thin metal component are observed, and the effect of the present invention may not be sufficiently obtained.

Further, according to the experiment of the inventor of the present invention, it can be understood that the shearing method of the present invention can be applied even when a plurality of thin plates are stacked. In this case, a plurality of thin plates are stacked between the punch and the die, and the relative movement of the punch is stopped and the shearing is completed before the punch passes through all the thin plates and is fitted into the hole for shearing. This improves the productivity because multiple sheets can be sheared simultaneously. Also, when a plurality of thin plates are stacked and used from the beginning, such as an electrode plate of a lithium ion battery, for example, it is possible to omit the step of laminating a plurality of thin plates at the same time by shearing. However, at the same time, the maximum number of sheets that can be subjected to shearing is about 10 sheets, considering the quality of the cut surface of the sheet to be processed. If this is exceeded, the cut surface gradually becomes rough, making it difficult to use in fields requiring high quality. When a plurality of thin plates are stacked and subjected to shearing at the same time, the punch is at least equal to the total thickness of the metal layers (the sum of the metal layer thicknesses in the multiple laminated thin plates) and the total thickness of the non- The sum of the thicknesses of the nonmetal layers in the first layer).

The shearing method of the present invention can be applied not only to the shearing by the punch and the die but also to the shearing by the die cutter and the anvil roll. That is, a thin plate in which a non-metallic layer is laminated on one side or both sides of a metal layer is sandwiched between a die cutter provided with a convex press-cutting blade on its surface and an anvil roll provided with recesses for shearing at a position corresponding to the convex press- The convex pushing cutting blade of the die cutter is rotated and pressed against the concave portion for shearing the anvil roll so that the convex pushing cutting blade of the die cutter does not pass through the thin plate and the front end of the anvil roll The thin plate is sheared without being fitted to the concave portion for machining. This shearing method also has the same effect as the shearing method described above with the punch and die. That is, the thin plate is completely sheared at a stage before the convex press cutting edge of the die cutter passes through the thin plate and is fitted to the concave portion for shearing of the anvil roll.

In the shearing method using the die cutter and the anvil roll, it is preferable to enter the convex press cutting edge of the die cutter to a position which is not less than the thickness of the metal layer but less than the total thickness of the non-metal layer with respect to the plate thickness of the thin plate.

Further, in the shearing method using the die cutter and the anvil roll, the intermediate plate having at least one non-metallic layer can be inserted between the thin plate and the die cutter in order to more reliably shear the thin plate to be processed. By using the intermediate plate in this way, the thin plate can be more surely sheared by the push-in effect due to the plastic flow of the intermediate plate. In this case, it is preferable to enter the convex push-cutting edge of the die cutter up to the total thickness of the thin plate and the intermediate plate to a position equal to or less than the thickness of the metal layer of the thin plate and the total thickness of the nonmetal layer and the intermediate plate of the thin plate.

Further, in the present invention, instead of a die cutter provided with a convex press-cutting blade on its surface, a press roll without a convex press-cutting blade may be used. That is, a thin plate in which a nonmetal layer is laminated on one surface or both surfaces of a metal layer is inserted between a pressing roll and an anvil roll provided with recesses for shearing, and the thin plate is pressed by a pressing roll into a recess , An intermediate plate having at least one nonmetal layer is inserted between the thin plate and the pressing roll at the time of shearing the thin plate by inserting the thin plate into the recess for the front end processing of the anvil roll, Shear without exceeding. In this case, the thin plate is completely sheared at a stage before the thin plate is completely pushed into the concave portion for shearing of the anvil roll. In this case, it is preferable that the thin plate be pushed into the concave portion for the shearing of the anvil roll to a position which is not less than the thickness of the metal layer but not more than the thickness of the nonmetal layer of the thin plate.

In such a shearing method using a die cutter or a pressing roll and an anvil roll, a plurality of thin plates are inserted and passed between a die cutter or a pressing roll and an anvil roll, so that a plurality of stacked thin plates can be simultaneously sheared. Specifically, when a die cutter is used, a plurality of thin plates are inserted between the die cutter and the anvil roll, and the convex press cutting edge of the die cutter is not passed through the entire thin plate, The entire thin plate is sheared without being fitted to the thin plate. In this case, it is preferable to enter the convex push-cutting edge of the die cutter to a position which is not less than the total thickness of the metal layer and not more than the total thickness of the nonmetal layer with respect to the total thickness of the plurality of overlapping thin plates. In the case of the intermediate plate, the total thickness of the multiple laminated and intermediate plates shall not exceed the total thickness of the metal layers of the multiple laminated laminations and to the position of less than the total thickness of the non- .

When a pressing roll is used, a plurality of thin plates are inserted between the pressing roll and the anvil roll, and an intermediate plate having at least one nonmetal layer is sandwiched between the plurality of overlapping thin plates and the pressing roll And shear the multiple laminated thin plates in the concave portions for shearing the anvil rolls without pushing them beyond the total thickness of the multiple laminated thin plates. In this case, it is preferable that the thin laminated sheets are stacked in the concave portions for shearing of the anvil rolls to a position equal to or more than the total thickness of the metal layers of the multiple laminated thin plates and less than the total thickness of the nonmetal layers of the multiple laminated thin plates.

In the present invention, in the case of using a pressing roll, instead of using the intermediate plate, the surface of the pressing roll can be coated with a layer having at least one nonmetal layer. Specifically, a thin plate or a metal thin plate having a nonmetal layer laminated on one side or both sides of a metal layer is inserted between a pressing roll coated with a layer having at least one nonmetal layer on its surface and an anvil roll provided with recesses for shearing, And the thin plate is sheared into the depression for shearing the anvil roll by pushing the thin plate to the concave portion for shearing the anvil roll by shearing it without exceeding the thickness of the thin plate in the recess for shearing the anvil roll when the thin plate is sheared. In this case, it is preferable that the thin plate be pushed into the concave portion for shearing the anvil roll to a position which is not less than the thickness of the metal layer and not more than the thickness of the nonmetal layer of the thin plate. In this configuration, when a plurality of thin plates are inserted and passed through shear, a plurality of overlapping thin plates are sheared without exceeding the total thickness of the plurality of overlapping thin plates in the concave portion for shearing of the anvil roll. Preferably, the multiple laminated thin plates are pushed into the concave portions for shearing of the anvil rolls to a position equal to or less than the total thickness of the metal layers of the multiple laminated thin plates and the total thickness of the nonmetal layers of the multiple laminated thin plates.

As described above, the shearing method of the present invention is applied to a thin plate in which a nonmetal layer is laminated on one side or both sides of a metal layer. The shearing method of the present invention is also applicable to the shearing of a metal thin plate. That is, in the case of using a die and a punch, a method of shearing the thin plate by shearing a metal thin plate between a die having a hole for shearing and a punch and relatively moving the punch toward the hole for shearing, An intermediate plate having at least one nonmetal layer is disposed between the thin plate and the punch and the relative movement of the punch is stopped before the punch passes through the intermediate plate to complete the shearing of the thin metal plate. In this case, the relative movement of the punch is preferably stopped at a position equal to or less than the thickness of the thin plate relative to the total thickness of the thin plate and the intermediate plate.

When using a die cutter and an anvil roll, a metal thin plate is inserted between a die cutter provided on the surface of the die with a convex press cutting blade and an anvil roll provided with a recess for shearing at a position corresponding to the convex press cutting edge , An intermediate plate having at least one non-metallic layer is inserted between the thin plate and the die cutter when the thin plate is sheared by pressing the convex press cutting edge of the die cutter against the concave portion for shearing the anvil roll , The convex pushing cutting edge of the die cutter is sheared without passing through the intermediate plate and without being fitted to the concave portion for shearing of the anvil roll. In this case, it is preferable that the convex press-cutting edge of the die cutter is introduced to the thickness of the thin plate and the thickness of the intermediate plate or less to the total thickness of the thin plate and the intermediate plate.

When a pressing roll and an anvil roll are used, a metal thin plate is inserted between a pressing roll and an anvil roll provided with recesses for shearing, and the thin plate is pushed into the depressed portion for shearing the anvil roll by a pressing roll The intermediate plate having at least one nonmetal layer is inserted between the thin plate and the pressing roll, and the thin plate is pushed to the recess for the front end working of the anvil roll in excess of the thickness of the thin plate Shear without putting. A metal thin plate was inserted between a pressing roll having a surface coated with a layer having at least one nonmetal layer and an anvil roll provided with a recess for shearing, and the thin plate was pressed by a pressing roll It is possible to shear the thin plate to the concave portion for the front end working of the anvil roll without pushing the thin plate beyond the thickness of the thin plate.

Among the shearing methods of the present invention described above, the intermediate plate is made endless so that the intermediate plate can be used repeatedly when a die cutter, a pressing roll, and an anvil roll are used and the intermediate plate is used, Is inserted between a thin plate and a die cutter or a pressing roll, then is passed between rolls to be pressed, and then inserted again between the thin plate and the die cutter or pressing roll.

In the present invention, the anvil roll may be formed such that the peripheral portion of the recess for the front end processing is formed of a material having a higher hardness than the other portions. As a result, it is possible to prevent chipping or the like of the periphery of the concave portion for shearing that becomes the front end portion, and shear can be reliably performed.

Further, a notch (cut-out portion) may be provided at a predetermined interval before and after the rotating direction of the recess for shearing the anvil roll. Thereby, it is possible to prevent the thin plate from being excessively pressed and damaged before and after the rotation direction of the concave portion for shearing.

According to the shearing method of the present invention, in the shearing of a thin plate or a metal thin plate in which a nonmetal layer is laminated on one side or both sides of a metal layer, the thin plate can be subjected to shearing with high quality over a long period of time, Therefore, the thin plate can be processed at a low cost with high quality.

1 shows a basic process of the shearing method of the present invention.
Fig. 2 shows another embodiment of the present invention.
Fig. 3 shows another embodiment of the present invention.
Fig. 4 shows another embodiment of the present invention.
Fig. 5 shows a modification of the embodiment of Fig.
Fig. 6 shows another embodiment of the present invention.
Fig. 7 shows an example of the shape of the convex press-cutting edge of the die cutter. Fig. 7 (b) is a cross-sectional view taken along line AA in Fig. FIG.
Fig. 8 shows another embodiment of the present invention.
Fig. 9 shows a modification of the embodiment of Fig.
Fig. 10 shows another embodiment of the present invention.
Fig. 11 shows another embodiment of the present invention.
Fig. 12 shows another embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described based on the embodiments shown in the drawings.

≪ Example 1 >

1 is an explanatory view showing a basic step of a shearing method of the present invention.

1, the workpiece 1 is an electrode plate of a lithium ion battery in which an active material (nonmetal layer) 1b is laminated on both sides of a metal layer 1a made of copper or aluminum. The thickness of the metal layer 1a is 20 占 퐉, and the thickness of the nonmetal layer 1b is 80 占 퐉, which is 180 占 퐉 in total.

As shown in Fig. 1 (a), the workpiece 1 is placed on the die 2 having the hole 2a for the front end and fixed. Then, as shown in Fig. 1 (b), the workpiece 1 is sheared by lowering the punch 3 disposed above the hole 2a for shearing.

In the embodiment, in the step of lowering the punch 3 to a position of 30 탆 after the punch 3 contacts the surface of the member to be processed 1, that is, to a position of 17% of the thickness of the member to be processed 1 The punch 3 was stopped. As a result, it was confirmed that the workpiece 1 was completely sheared. The product part of the workpiece to be processed which is sheared can be easily taken out by pushing or sucking the part from above or below. In the embodiment, the clearance between the punch and die is 10 mu m. 10 占 퐉 is a value which does not have any particular difficulty when the mold is manufactured.

As described above, in this embodiment, since the punch 3 does not directly contact the metal layer 1a at the center of the member to be processed 1 and the member to be processed 1 is sheared, (3) and does not adversely affect the shearing process. In addition, there is no problem of surface roughness of the front surface.

In the embodiment of FIG. 1, the example is shown in which the workpiece 1 having the nonmetal layer 1b laminated on both sides of the metal layer 1a is sheared. However, the shear of the workpiece, Is also possible. In this case, it is preferable that the non-metal layer is brought into contact with the non-metal layer with the non-metal layer facing upward.

In the embodiment of FIG. 1, the punch 3 is disposed above the die 2, but the punch may be disposed under the die by vertically inverting. Although the punch 3 is moved up and down in the embodiment of Fig. 1, the die 2 may be moved up and down.

≪ Example 2 >

2 shows another embodiment of the present invention. This embodiment is an example in which a plurality of sheets to be processed are stacked and sheared.

The processed sheet material 1 was an electrode plate of a lithium ion battery having a plate thickness of 180 占 퐉 as in the above-described embodiment, and the eight sheets were overlapped. That is, the total thickness of the workpiece 1 is 1.44 mm.

In the embodiment, after the punch 3 is brought into contact with the surface of the member to be processed 1 on the surface of the member to be processed 8, The punch 3 was stopped at the stage where the punch 3 was lowered to the position of%. As a result, it was confirmed that all of the eight workpieces 1 were completely sheared.

≪ Example 3 >

Figure 3 shows another embodiment of the present invention. This embodiment is an example in which a metal sheet is sheared using a punch and a die.

3 (a), a metal thin plate is placed on the die 2 as the workpiece 7 and an intermediate plate 8 having at least one nonmetal layer is formed on the workpiece 7 ). In the embodiment, the processed sheet material 7 is a titanium plate having a thickness of 20 占 퐉, and the intermediate plate 8 is a polypropylene plate having a thickness of 150 占 퐉. As the material of the intermediate plate 8, it is possible to use various materials such as acrylic resin, PET, polycarbonate, bakelite, plastic, fluorine resin, epoxy resin, polyurethane, polyvinyl chloride, polyamide, polyethylene, A non-metallic layer such as a glass plate, an asphalt layer, and a synthetic fiber layer may be used, or a laminate of these non-metallic layers or a laminate of such a non-metallic layer and a metal layer may be used.

The workpiece 7 is subjected to shearing by lowering the punch 3 disposed above the hole 2a for shearing the die as shown in Fig. 3 (b).

The thickness of the intermediate plate 8 is not more than the thickness of the processed sheet material 7 (thin metal plate), i.e., the thickness of the intermediate plate 8 after the punch 3 contacts the surface of the intermediate plate 8, The punch 3 was stopped at a stage where the punch 3 was lowered to a position where the punch 3 did not penetrate through the opening 8. As a result, it was confirmed that the workpiece 7 was completely sheared. The product portion of the sheared processed sheet material can be simply taken out by pushing or sucking the portion from above or below.

In the case of shearing the thin metal plate with the intermediate plate 8 interposed therebetween as in the present embodiment, after the punch 3 abuts against the surface of the intermediate plate 8, at least a distance equal to the thickness of the thin metal plate, It is preferable that the punch 3 is stopped at a stage before the punch 3 passes through the intermediate plate 8. In other words, it is preferable that the depth of the punch 3 after being brought into contact with the surface of the intermediate plate 8 is not less than the thickness of the member to be processed (thin metal plate) and the thickness of the intermediate member. In this case, it is premised that the thickness of the intermediate plate is larger than the thickness of the workpiece (thin metal plate).

<Example 4>

Figure 4 shows another embodiment of the present invention. This embodiment is an example in which the present invention is applied to a shearing method by a die cutting roll comprising a die cutter and an anvil roll. The material to be processed is the same as the first embodiment.

As shown in Fig. 4, on the surface of the die cutter 4, a convex press cutting edge 4a is provided at a position corresponding to the concave portion 5a for the front end processing of the anvil roll. The workpiece 1 is inserted between the die cutter 4 and the anvil roll 5 which are respectively rotated in the direction of the arrow and the convex press cutting edge 4a of the die cutter is inserted into the recess 5a of the anvil roll. So that the workpiece 1 is sheared.

As shown in Fig. 4, the convex pushing cutting edge 4a of the die cutter is inserted into the concave portion 5a of the anvil roll 1 without passing through the member to be processed 1, The workpiece 1 is sheared without matching. In the embodiment, the convex pushing cutter blade 4a has its end approached to a position of 20 m from the surface of the member to be processed 1, that is, to a position of 11% of the thickness of the member 1 to be processed. As a result, it was confirmed that the processed sheet material (1) was completely sheared in the same manner as in Example 1. The product part of the sheared processed sheet material can be simply taken out by pushing or sucking the part from above or below.

Although not shown in the drawing, two sheets of the workpieces 1 to be superimposed on each other are inserted between the die cutter 4 and the anvil roll 5, and the position of 130 μm on the surface of the workpiece 1, At the time when the convex pushing cutting edge 4a of the die cutter is advanced to the position of 36% of the total thickness of the workpiece 1, as in the second embodiment, all the two workpieces 1 to be processed are completely sheared .

In the embodiment shown in Fig. 4, the example is shown in which the workpiece 1 having the nonmetal layer 1b laminated on both sides of the metal layer 1a is sheared. However, the shear of the workpiece, Is also possible. In this case, it is preferable to bring the nonmetal layer into contact with the die cutter 4.

Fig. 5 shows a modification of the embodiment of Fig. In the example of Fig. 5, the intermediate plate 6 having at least one nonmetal layer is inserted between the workpiece 1 and the die cutter 4. By interposing the intermediate plate 6 in this way, the workpiece 1 can be more surely sheared by the pushing effect by the plastic flow of the intermediate plate 6. [

Specific examples of the intermediate plate 6 include an acrylic resin, PET, polycarbonate, bakelite, plastic, fluororesin, epoxy resin, polyurethane, polyvinyl chloride, polyamide, polyethylene, polypropylene, vinyl chloride, A non-metallic layer such as a paper, a glass plate, an asphalt, and a synthetic fiber may be used, or a laminate of these non-metallic layers or a laminate of these non-metallic layers and metal layers may be used.

&Lt; Example 5 >

Figure 6 shows another embodiment of the present invention. This embodiment is an example of shearing a metal thin plate using a die cutter and an anvil roll.

As shown in Fig. 6, on the surface of the die cutter 4, a convex press cutting edge 4a is provided at a position corresponding to the concave portion 5a for the front end processing of the anvil roll. In this configuration, a thin metal plate is inserted between the die cutter 4 and the anvil roll 5, which are respectively rotated in the direction of the arrow, as the to-be-processed sheet material 7, and between the to-be-processed sheet material 7 and the die cutter 4 An intermediate plate 6 having at least one non-metallic layer is inserted. The convex pushing cutting edge 4a of the die cutter is pressed against the concave portion 5a of the anvil roll so that the work piece 7 is pressed against the intermediate plate 6 to the concave portion 5a of the anvil roll so as to shear the member 7 to be processed. The convex pushing cutting edge 4a of the die cutter does not penetrate the intermediate plate 6 and the work piece 7 and is not fitted to the concave portion 5a of the anvil roll, ).

When cutting the workpiece 7 (thin metal plate) with the intermediate plate 6 interposed therebetween by the die cutting roll as in the present embodiment, the die cutter 4 The gap (gap) between the anvil rolls 5 is set such that the thickness of the work piece (the metal thin plate) and the intermediate plate to the recess 5a for shearing the anvil roll is equal to or smaller than the thickness of the plate to be processed, . In other words, the gap (gap) between the die cutter 4 and the anvil roll 5 is equal to or less than [(thickness of the material to be processed + thickness of the intermediate plate) - thickness of the material to be processed] . In this case, it is premised that the thickness of the intermediate plate is larger than the thickness of the workpiece (thin metal plate).

In Embodiments 4 and 5 in which the die cutter 4 and the anvil roll 5 are used, the outer shape of the convex press-saw blade 4a of the die cutter is determined by the experiment of the present inventor, It is preferable that the outer shape of the outer surface 5a is equal to or slightly larger than the outer shape. Specifically, assuming that the length of one side of the outer shape of the convex press-saw blade 4a is A and the length of one side of the outer shape of the corresponding shearing recess 5a is B, as shown in Fig. 4, Lt; 1.1B. The reason is that if A is smaller than B, burrs are easily generated at the front end portion, and the quality of the front end face is deteriorated. Conversely, if A is larger than 1.1B, the quality of the processed sheet material deteriorates because the pressing portion is widened and the portion to be pressed on the processed sheet material is widened.

Next, the shape of the convex pushing cutting edge 4a of the die cutter used in the present invention will be described. Typically, in the case of shearing by a die cutter, the convex pushing cutting edge 4a of the die cutter protrudes only the outer portion as shown in Figs. 7 (a) and 7 (b) 7 (a) and 7 (b), it is not always necessary to form the shape of the end of the acute angle shape, And the entire end thereof may be protruded in a rectangular shape or as shown in FIGS. 7 (e) and 7 (f), and the end thereof may be formed in an obtuse angle. 7 (d) and 7 (f), the end may be subjected to R machining.

&Lt; Example 6 >

Figure 8 shows another embodiment of the present invention. This embodiment is an example in which shearing is performed using a pressing roll and an anvil roll. The workpiece 1 is the same as the first embodiment.

As shown in Fig. 8, a convex push-cutting blade is not formed on the surface of the pressing roll 9, and its surface is smooth. The surface of the anvil roll 5 facing the pressing roll 9 is provided with recesses 5a for shearing according to the shape of the product to be cut. In this configuration, the workpiece 1 is inserted between the pressing roll 9 and the anvil roll 5 which are respectively rotated in the direction of the arrows, and between the workpiece 1 and the pressing roll 9, The intermediate plate 6 having at least one layer is inserted.

The workpiece 1 is then sheared by pushing the workpiece 1 into the concave portion 5a for shearing the anvil roll by the pressing roll 9. In this shearing step, the work piece 1 is sheared into the concave portion 5a for shearing of the anvil roll in excess of the thickness of the member to be processed 1. Specifically, the workpiece 1 is pushed into the concave portion 5a for shearing the anvil roll to a position equal to or larger than the thickness of the metal layer 1a and equal to or less than the thickness of the nonmetal layer 1b of the workpiece 1. It was confirmed that the workpiece 1 was completely sheared when the workpiece 1 was actually pushed into the concave portion 5a for shearing the anvil roll 20 占 퐉 and sheared.

Although not shown, two sheets of the workpieces 1 to be superimposed on each other are inserted between the pressing roll 9 and the anvil roll 5, and the two sheets of the workpieces 1 which are superimposed on the anvil roll 5 are inserted into the recess 5a and sheared completely, the entirety of the two workpieces 1 to be processed was completely sheared.

Fig. 9 shows a modification of the embodiment of Fig. In the example of Fig. 9, the thin metal plate is sheared as the workpiece 7. That is, the workpiece 7 is pressed against the concave portion 5a of the anvil roll with the intermediate plate 6 interposed therebetween by the pressing roll 9 to shear the workpiece 7.

Specifically, the processed plate 7 was an aluminum foil having a thickness of 20 占 퐉, and the intermediate plate 6 was a PET resin having a thickness of 500 占 퐉. The gap (clearance) between the pressing roll 9 and the anvil roll 5 was set to be 500 mu m. As a result, it was confirmed that the workpiece 7 was completely sheared.

&Lt; Example 7 >

Fig. 10 shows another embodiment of the present invention. In the examples of Figs. 5, 6, 8 and 9 described above, the intermediate plate 6 inserted between the workpiece 1 (7) and the die cutter 4 or the pressing roll 9 However, in the present embodiment, the intermediate plate 6 can be used repeatedly.

Specifically, as shown in Fig. 10, after the intermediate plate 6 is used as an endless and the intermediate plate 6 is inserted between the member to be machined 1 (7) and the die cutter 4 to be used for the front end Passes between the rolls 10 and 10 and is then pressed and inserted again between the workpiece 1 (7) and the die cutter 4. Thus, even if plastic deformation corresponding to the concave portion 5a of the anvil roll (protruding press cutting edge 4a of the die cutter) is generated in the intermediate plate 6 after being used in the front end due to the pressing at the time of the front end, 10, and 10 so that the intermediate plate 6 is returned to its original shape before use, so that it can be used repeatedly, which is advantageous in terms of cost.

When the intermediate plate 6 is repeatedly used, it is preferable that the intermediate plate 6 is made of a material having flexibility such as rubber so that the intermediate plate 6 can be easily returned to its original shape. 10 shows an example in which the die cutter 4 is used, it goes without saying that a pressing roll can be used instead of the die cutter 4.

&Lt; Example 8 >

Fig. 11 shows another embodiment of the present invention. This embodiment is characterized in that an outer layer 9a having at least one non-metallic layer is formed on the surface of the pressing roll 9, instead of passing the intermediate plate between the working plate member 1 (7) and the pressing roll 9 It is covered.

According to the present embodiment, it is possible to perform the same shearing as in the case of inserting the intermediate plate between the member to be processed 1 (7) and the pressing roll 9, and to prevent the intermediate plate from being one-time. At the time of shearing, the work piece 1 (7) is sheared into the recess 5a for shearing of the anvil roll beyond the thickness of the work piece 1 (7). The material of the outer layer 9a is preferably made of a material having flexibility such as rubber so as to easily return to the original shape.

&Lt; Example 9 >

Fig. 12 shows another embodiment of the present invention. In this embodiment, notches (cut-out portions) 5b are provided at predetermined intervals before and after the rotating direction of the concave portion 5a of the anvil roll.

By providing the notches 5b in this manner, it is possible to prevent the unnecessary portions from being pressed between the die cutter 4 and the anvil roll 5 when the workpiece 1 (7) is sheared. In other words, the outer circumferential portion of the anvil roll having the length L between the concave portion 5a of the anvil roll and the notch 5b is a portion necessary for shearing the member to be processed 1 (7) It is possible to prevent the front end of the workpiece 1 (7) from being pressed between the die cutter 4 and the anvil roll 5 to an unnecessary portion at the front end thereof. This makes it possible to prevent the workpiece 1 (7) from being damaged by a useless pressing force. Particularly, in the case of a workpiece having an active material (nonmetal layer) on its surface, which is used in Example 1, the active material is fragile and prone to damage, so that the present embodiment is effective.

Although the length L is related to the diameter of the anvil roll, it is appropriate that the length L is 0.5 to 2 mm. If it is less than 0.5 mm, the surface of the workpiece to be processed around the front end face may be scratched. On the other hand, when the thickness exceeds 2 mm, the pressing portion widens and the portion of the workpiece to be pressed is widened, so that the damage of the workpiece is increased. That is, the length (L) of 0.5 to 2 mm is most suitable because it does not cause scratches on the surface of the workpiece and minimizes the pressing portion. 12 shows an example in which the die cutter 4 is used, it goes without saying that a pressing roll can be used instead of the die cutter 4.

When the anvil roll is used in the above embodiment, it is preferable that the peripheral portion of the recess for shearing is formed of a material having hardness higher than that of the other portions. For example, the periphery of the concave portion for shearing can be formed by cemented carbide, ceramic, or DLC coating. As a result, it is possible to prevent chipping and the like of the peripheral portion of the recess for shearing that becomes the front end portion, and shear can be reliably performed.

The material of the die cutter, the pressing roll, and the anvil roll body is preferably made of a material having a Young's modulus of 150 GPa or more and easy to be processed.

1 Workpiece (thin plate including non-metallic layer)
1a metal layer
1b non-metallic layer
2 die
2a Shearing hole
3 punches
4 die cutter
4a convex push cutting blade
5 Anvil roll
5a recess for shearing
5b notch
6 intermediate plate
7 Workpiece (thin sheet of metal)
8 intermediate plate
9 pressing roll
9a outer layer
10 rolls

Claims (33)

There is provided a method of shearing a thin plate by placing a thin plate laminated with a nonmetal layer on one or both surfaces of a metal layer between a die having a hole for shearing processing and a relatively moving punch toward a hole for shearing,
A method of shearing a thin plate, wherein the punch passes through the thin plate and stops relative movement of the punch before the thin plate is fitted into the hole for shearing. The method according to claim 1,
Wherein the thickness of the metal layer of the thin plate is smaller than the total thickness of the nonmetal layer and the relative movement of the punch is stopped at a position equal to or greater than the thickness of the metal layer and less than the total thickness of the nonmetal layer. The method according to claim 1,
A shearing method of a thin plate wherein a plurality of thin plates are stacked and the relative movement of the punch is stopped at a stage before the punches are passed through all the thin plates and fitted into the holes for shearing. The method of claim 3,
The thickness of the metal layer of the thin plate is smaller than the total thickness of the nonmetal layer and the relative movement of the punch is stopped at a position above the total thickness of the metal layer and below the total thickness of the non- Way. A metal sheet is disposed between punches having the same outer shape as the inner shape of the hole for the front end processing and the punch is relatively moved toward the hole for the front end processing so as to shear the thin plate In the shearing method of the present invention,
Wherein a middle plate having at least one non-metallic layer is disposed between the thin plate and the punch and stops the relative movement of the punch at a stage before the punch penetrates the intermediate plate and finishes the shearing of the thin plate. 6. The method of claim 5,
Wherein the thickness of the thin plate is smaller than the thickness of the intermediate plate and the relative movement of the punch is stopped at a position equal to or less than the thickness of the thin plate and the thickness of the intermediate plate with respect to the total thickness of the thin plate and the intermediate plate. A thin plate laminated with a nonmetal layer on one or both sides of a metal layer is inserted between a die cutter provided with a convex press cutting blade on its surface and an anvil roll provided with recesses for shearing at a position corresponding to the convex press cutting blade The convex pushing cutting edge of the die cutter is rotated and pressed against the concave portion for the front end processing of the anvil roll so that the convex pushing cutting edge of the die cutter is prevented from passing through the thin plate, A shearing method of a thin sheet shearing a thin sheet without being fitted to the sheet. 8. The method of claim 7,
Wherein the thickness of the metal layer of the thin plate is less than the total thickness of the nonmetal layer and is greater than the thickness of the metal layer with respect to the thickness of the thin plate and into the convex push cutting edge of the die cutter to a position less than the total thickness of the non- 8. The method of claim 7,
A plurality of the thin plates are inserted and passed between the die cutter and the anvil roll so that the convex press cutting edge of the die cutter is not passed through the entire thin plate and is not fitted to the concave portion for the front end working of the anvil roll, Shear shear method. 10. The method of claim 9,
The thickness of the metal layer of the thin plate is less than the total thickness of the nonmetal layer and is greater than the total thickness of the metal layer with respect to the total thickness of the multiple laminated thin plates and is less than the total thickness of the non- Shear method. 10. The method according to claim 7 or 9,
Wherein an intermediate plate having at least one non-metallic layer is inserted between the thin plate and the die cutter. 12. The method of claim 11,
The thickness of the metal layer of the thin plate is smaller than the thickness of the nonmetal layer and the intermediate plate of the thin plate and is not more than the total thickness of the metal layer of the thin plate and the total thickness of the intermediate plate, Wherein the convex pushing cutting edge of the thin plate is inserted. 12. The method of claim 11,
Wherein the intermediate plate is made into an endless piece, the intermediate plate is inserted between the thin plate and the die cutter, then passed between the rolls to be pressed, and then inserted again between the thin plate and the die cutter. 10. The method according to claim 7 or 9,
Wherein the anvil roll is formed by a material whose hardness is higher than that of other portions of the peripheral portion of the concave portion for the front end processing. 10. The method according to claim 7 or 9,
Wherein the anvil roll is provided with notches at predetermined intervals before and after the rotating direction of the concave portion for shearing. A metal thin plate is inserted between a die cutter provided with a convex press cutting blade on a surface thereof and an anvil roll provided with a concave portion for shearing at a position corresponding to the convex press cutting blade so that the convex push cutting blade of the die cutter Wherein the intermediate plate having at least one non-metallic layer is inserted between the thin plate and the die cutter when the thin plate is sheared by rotational pressing on the recess for shearing the anvil roll, and the convex push- A method of shearing a thin plate without penetrating the plate and shearing the thin plate without being fitted to the concave portion for shearing of the anvil roll. 17. The method of claim 16,
Wherein the thickness of the thin plate is smaller than the thickness of the intermediate plate and the convex press cutting edge of the die cutter enters the thickness of the thin plate to a thickness equal to or less than the thickness of the thin plate relative to the total thickness of the thin plate and the intermediate plate. 18. The method according to claim 16 or 17,
Wherein the intermediate plate is made into an endless piece, the intermediate plate is inserted between the thin plate and the die cutter, then passed between the rolls to be pressed, and then inserted again between the thin plate and the die cutter. 18. The method according to claim 16 or 17,
Wherein the anvil roll is formed by a material whose hardness is higher than that of other portions of the peripheral portion of the concave portion for the front end processing. 18. The method according to claim 16 or 17,
Wherein the anvil roll is provided with notches at predetermined intervals before and after the rotating direction of the concave portion for shearing. delete delete delete delete delete delete delete delete delete delete delete delete delete

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