Pressing device, press processing method, and press processing tool

Abstract

To properly perform various processing to a workpiece in a press work device.SOLUTION: A press work device for performing a press work to a plate-like member 50 being a workpiece comprises: an upper side processing tool 22 being one side mold which is pressed against the plate-like member 50 from one side; and a lower side processing tool 24 being an opposing member which is opposed to the upper side processing tool 22. The upper side processing tool 22 comprises: shear processing parts 102a, b being shear processing recesses; and drawing processing parts 104a, b for performing drawing processing to the plate-like member 50. The shear processing parts 102a, b are recesses configured such that a second recess is formed on the bottom of a first recess, shear a portion of the plate-like member 50 with cutting blade parts in the shear processing parts 102a, b in the time of pressing, and simultaneously perform drawing processing to the plate-like member 50 at positions corresponding to the drawing processing parts 104a, b.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a press working apparatus, a press working method, and a working tool for press working. [Background technology]

[0002] Conventionally, press working devices that perform press working on plate-shaped workpieces have been widely used. For example, Patent Document 1 below discloses a press working device that can perform nano-order processing without precisely configuring multiple locations and can easily perform precise position adjustment. In addition, the press working device can perform various processes such as shearing (punching) and drawing (forming) by using a mold that is created depending on the type of processing. In this case, it is also possible to perform multiple types of processing on a single workpiece by sequentially changing the mold or press working device used. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2015-178129 Summary of the Invention [Problem to be solved by the invention]

[0004] When multiple types of processing are performed on a workpiece using a die, the subsequent processing step typically involves using a workpiece that has already been processed. In this case, the subsequent processing step typically requires highly accurate alignment of the workpiece and the die, taking into account the position of the workpiece processed in the previous step. This may result in, for example, the need to use a press processing device capable of highly accurate alignment or to spend time on the alignment, which increases the cost and time required for processing. Therefore, a more appropriate method for performing press processing has been desired. Therefore, an object of the present invention is to provide a press processing device, a press processing method, and a press processing tool that can solve the above problems. [Means for solving the problem]

[0005] The inventors of the present application conducted extensive research into a preferred configuration for performing various processes on workpieces. They came up with the idea of ​​performing shearing and drawing simultaneously in one process, rather than separately. This configuration allows various processes to be performed appropriately on workpieces without, for example, requiring highly accurate alignment based on the position of the previous process. Furthermore, through further research, the inventors of the present application discovered preferred features for performing processes using this method, leading to the present invention.

[0006] In order to solve the above-mentioned problems, the present invention provides a press processing device that performs press processing on a plate-shaped workpiece, and includes a one-side die that is a die that is pressed against the workpiece from one side of the workpiece, an opposing member that is a member that faces the one-side die across the workpiece, and a pressing mechanism that presses at least one of the one-side die and the opposing member toward the workpiece, wherein the one-side die has a cutting blade portion that functions as a cutting blade that shears the workpiece, and a drawing portion that is a recess or protrusion for drawing the workpiece, and when the pressing mechanism presses at least one of the one-side die and the opposing member toward the workpiece, the cutting blade portion shears a portion of the workpiece, and at the same time, drawing is performed on the workpiece at a position corresponding to the drawing portion.

[0007] With this configuration, for example, shearing and drawing can be performed simultaneously on the workpiece, and various processes can be performed on the workpiece while preventing increases in the cost and time required for the processes.

[0008] In this configuration, the opposing member may be, for example, a mold having a shape that matches the shape of one of the molds. In this case, the mold may be, for example, a mold component whose surface that contacts the workpiece is made of metal. Alternatively, the opposing member may be a component other than a mold. Such an opposing member may be, for example, a component that deforms in response to external forces generated during press working, such as rubber or a viscous material. Alternatively, the opposing member may be, for example, a component partially formed of a material that deforms in response to external forces and partially formed of metal. More specifically, when molds are used as both the upper and lower components that sandwich the workpiece in a press working apparatus, the upper and lower molds must be aligned with high precision so that the clearance at the shearing position is less than 10% (e.g., approximately 7%) of the thickness of the workpiece. In contrast, when rubber or a viscous material is used instead of one of the upper and lower molds (e.g., the lower mold), shearing can be performed appropriately without such high-precision alignment. However, in the case of such a configuration using rubber, viscous material, etc., it may be difficult to perform high-quality drawing. In contrast, when shearing and drawing are performed simultaneously, if the opposing members are formed of rubber, viscous material, etc. at the position where shearing is performed and of metal at the position where drawing is performed, it becomes possible to perform high-quality drawing while eliminating the need for highly accurate alignment at the shearing position.

[0009] In this case, for example, the portion of the opposing member that faces the drawing portion of the one die across the workpiece is formed of metal. This portion, for example, has a convex or concave portion corresponding to the concave or convex portion of the drawing portion of the one die. Furthermore, the portion of the opposing member that faces the cutting edge portion of the one die across the workpiece when pressed is made of, for example, a material that deforms in response to the pressure received when pressed. This configuration allows for easier and more appropriate processing, for example, when shearing and drawing are performed simultaneously. Furthermore, in this case, the periphery of the deformable portion of the opposing member, which is made of a material that deforms in response to the pressure received when pressed, is made of, for example, metal. In this case, it is possible to consider, for example, making the deformable portion protrude toward the workpiece compared to the surrounding area made of metal. This configuration allows for more appropriate shearing, for example.

[0010] Furthermore, in the one-side die, the cutting edge portion surrounds, for example, an area corresponding to a portion of the workpiece. With this configuration, for example, punching can be appropriately performed on the workpiece in the shape of the range surrounded by the cutting edge portion. In this case, the portion to be punched in the punching process can also be considered as the portion that will become the product after processing. In such a case, for example, drawing can also be performed on the portion to be punched in the punching process. In this case, the one-side die has, for example, at least one drawing portion within the range surrounded by the cutting edge portion. With this configuration, for example, various processes can be appropriately performed on the workpiece. Furthermore, when using a one-side die with such a shape, for example, the size of the one-side die may increase as the range surrounded by the cutting edge portion increases. On the other hand, when aligning the dies in a configuration using upper and lower dies, it is generally considered that as the size of the dies increases, high-precision alignment becomes more difficult. Therefore, when using a one-side die with such a shape, it is particularly preferable to form the portion of the opposing member that will be sheared using a deformable material as described above. In this case, the portion of the opposing member that faces the cutting edge of the one-side die across the workpiece when pressed is made of, for example, a member that deforms in response to the pressure received when pressed. With this configuration, shearing can be performed more easily and appropriately, even when, for example, a large one-side die is used.

[0011] In this configuration, the one-side mold may have a recess at the position of the cutting edge. More specifically, in this case, the one-side mold may have a shearing recess, which is a recess that is recessed in a direction away from the workpiece at the position of the cutting edge. In this case, at least a portion of the edge of the shearing recess may be considered to be the cutting edge. Furthermore, in this case, when pressed, the opposing member applies a force to a portion of the workpiece in a direction away from the cutting edge by, for example, pushing a portion of the workpiece into the shearing recess. This configuration allows the workpiece to be more appropriately separated at the position of the cutting edge. Furthermore, in this case, applying a force to a portion of the workpiece in a direction away from the cutting edge allows for more appropriate shearing, even when using a workpiece with a small thickness.

[0012] Furthermore, such a shearing recess may have edges formed by a first edge along the first closed path and a second edge along a second closed path surrounding the first edge. In this case, either the first edge or the second edge may be used as a cutting edge. This configuration allows the edge of the shearing recess to function properly as a cutting edge. When using a one-sided mold having such a configuration, it is also possible to separate the workpiece when the tip of the cutting edge reaches a position midway through the thickness of the workpiece. More specifically, in this case, during pressing, the opposing member applies a force to a portion of the workpiece in a direction away from the cutting edge, thereby separating the workpiece when the tip of the cutting edge reaches a position midway through the thickness of the workpiece. This configuration, for example, can reduce the occurrence of problematic burrs at the cutting position of the cutting edge.

[0013] In this configuration, the first die and the opposing member overlap, sandwiching the workpiece, with one of them vertically positioned on top of the other. The pressing mechanism may be configured to drop a weight from above the first die and the opposing member. In this case, the pressing mechanism may drop the weight from a position vertically above the first die and the opposing member, with the weight impacting the position at a speed of 3 m / s or greater, thereby pressing either the first die or the opposing member toward the workpiece. This configuration allows for the use of the impact of the weight to appropriately perform press working at high press speeds, for example. This also allows for more appropriate simultaneous shearing and drawing, even when using a thin workpiece. In this case, it is possible to perform press working on a workpiece with a thickness of less than 1 mm (e.g., 100 μm or less). The impact force generated when the weight impacts the first die and the opposing member is preferably approximately 600,000 kgw or greater.

[0014] Furthermore, it is also conceivable that the present invention may be configured using a press working method or a press working tool having the same characteristics as those described above. In these cases, for example, the same effects as those described above can be obtained. [Effects of the Invention]

[0015] According to the present invention, for example, in a press working device, various processes can be appropriately performed on a workpiece. [Brief explanation of the drawings]

[0016] [Figure 1] 1 is a diagram showing an example of the configuration of a stamping device 10 according to an embodiment of the present invention. [Figure 2] 2(a) and 2(b) are a bottom view and a cross-sectional view showing an example of the configuration of the upper processing tool 22. FIG. 2(c) shows an example of a product manufactured by press processing performed by the press processing apparatus 10. [Figure 3] 10A and 10B are diagrams for explaining the features of the lower processing tool 24 in more detail. [Figure 4] 4A and 4B are diagrams illustrating the shape of the shearing section 102 of the upper processing tool 22. Fig. 4A shows an example of the shape of the shearing section 102. Fig. 4B shows a modified example of the shape of the shearing section 102. [Figure 5] 5A and 5B are diagrams showing further modified examples of the shape of the shear processing portion 102. Fig. 5A shows an example of the shape of the shear processing portion 102 having a bottom surface 306 without a protrusion. Fig. 5B shows an example of the shape of the shear processing portion 102 having multiple edges that become cutting edges. [Figure 6] 6A and 6B are diagrams illustrating a modified example of the configuration of the lower processing tool 24. Fig. 6A is a cross-sectional view showing the configuration of the lower processing tool 24 of this modified example. Fig. 6B shows another modified example of the configuration of the lower processing tool 24. [Figure 7] 10A and 10B are diagrams showing the configuration of further modified examples of the upper processing tool 22 and the lower processing tool 24. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0017] A stamping apparatus 10 according to one embodiment of the present invention will be described below with reference to the drawings. The drawings described below are schematic diagrams whose scales have been appropriately changed to facilitate understanding of the features of the present invention, and do not necessarily precisely reflect actual dimensions. FIG. 1 shows an example of the configuration of a stamping apparatus 10 according to one embodiment of the present invention. Except as described below, the stamping apparatus 10 may have the same or similar features as known stamping apparatuses. For example, the stamping apparatus 10 may further include components that are the same or similar to known stamping apparatuses 10 in addition to the components shown in the drawings.

[0018] In this example, the press working apparatus performs press working on a plate-shaped workpiece 50, and includes a base 12, a shock absorbing unit 14, a tool set 16, and a pressing mechanism 18. The base 12 is a foundation that supports the other components of the press working apparatus 10. In this example, the base 12 is located vertically (in the direction of gravity) lower than the tool set 16 and the pressing mechanism 18 and houses the shock absorbing unit 14 therein. The shock absorbing unit 14 is a counterweight that prevents the impact force generated during press working from being transmitted directly to the ground. In this case, the impact force generated during press working is, for example, the impact force generated when a weight 32 in the pressing mechanism 18, which will be described later, falls. The shock absorbing unit 14 is preferably configured to have a weight 30 times or more that of the weight 32.

[0019] The tool set 16 is a portion having tools and the like that come into contact with the plate-like member 50. The tool set 16 can be considered to have a configuration corresponding to, for example, a die set in the press working apparatus 10. In this example, the tool set 16 is an example of a press working tool and includes an upper tool 22, a lower tool 24, and a presser plate 26. The upper tool 22 is a tool that is pressed against the plate-like member 50 from above in the vertical direction. The lower tool 24 is a tool that is pressed against the plate-like member 50 from below in the vertical direction. More specific configurations of the upper tool 22 and the lower tool 24 will be described in more detail later. The presser plate 26 is a member that presses the upper tool 22 from above in the vertical direction. When the weight 32 falls in the pressing mechanism 18, the presser plate 26 receives a direct impact from the weight 32 and transmits the impact force to the upper tool 22.

[0020] The pressing mechanism 18 presses at least one of the upper processing tool 22 and the lower processing tool 24 toward the plate-like member 50. In this example, the pressing mechanism 18 is configured to apply an impact force to the upper processing tool 22 via the presser plate 26 by dropping a weight 32, and includes the weight 32, a chuck 34, a guide 36, and a wire 38. The weight 32 is a weight member that drops vertically from above toward the processing tool set 16 during press working. By transmitting the impact force of the fall to the upper processing tool 22 via the presser plate 26 of the processing tool set 16, the upper processing tool 22 is pressed toward the plate-like member 50 with the pressure required for press working. As the weight 32, for example, a weight member having a predetermined weight of about 100 kg (e.g., about 50 to 150 kg) can be used. Furthermore, the area of ​​the lower surface, which is the vertically lower surface of the weight 32, is larger than, for example, the area of ​​the region of the plate-like member 50 that is to be press-processed. With this configuration, for example, when performing press processing, it is possible to apply pressure more uniformly to the region that is to be press-processed. Furthermore, it is preferable that the area of ​​the vertically lower surface of the weight 32 is larger than, for example, the area of ​​the upper surface, which is the vertically upper surface that serves as the collision surface of the upper processing tool 22. Furthermore, in this example, the weight 32 is a substantially rectangular member with through holes, through which the guide portions 36 pass, provided at the corners.

[0021] The chuck 34 is a member that attracts the weight 32 when lifting the weight 32 to a predetermined height. Examples of suitable chucks include a magnetic chuck that attracts the weight 32 using magnetic force and a mechanical chuck that attracts the weight 32 mechanically. In this example, the chuck 34 is a member that can switch on and off the attraction, and releases the attraction to the weight 32 at a predetermined height, allowing the weight 32 to fall. The guide 36 is a member that guides the movement of the weight 32 when it is dropped. In this example, the guide 36 has four pillars that each pass through a through hole at the corner of the weight 32. These four pillars guide the movement of the weight 32. These four pillars are arranged around the periphery of the tool set 16. The guide 36 allows the weight 32 to collide with the presser plate 26 while keeping the lower surface of the weight 32 parallel to the upper surface of the upper tool 22. The wire 38 is a member for moving the chuck portion 34 and is connected to the chuck portion 34. The wire 38 moves in response to a power source (not shown) to raise and lower the chuck portion 34. More specifically, in this example, the wire 38 moves the chuck portion 34, which is holding the weight 32, upward in the vertical direction, thereby moving the chuck portion 34 together with the weight 32 to a predetermined height. Just before the weight 32 is dropped, the wire 38 maintains the chuck portion 34 at this height. Then, after the chuck portion 34 releases the weight 32 and the weight 32 has fallen, the wire 38 lowers the chuck portion 34 to the position of the weight 32. With this configuration, for example, it is possible to appropriately perform press working by utilizing the impact force generated by the fall of the weight 32.

[0022] Here, in the press working apparatus 10 of this example, the pressing mechanism 18 drops the weight 32 without intentional acceleration or deceleration. In this case, the fall of the weight 32 can be considered to be a free fall. In this case, the pressing mechanism 18 can be considered, for example, as a dropping mechanism that drops the weight 32 freely from a predetermined height. The pressing mechanism 18 can also be considered, for example, as a lifting mechanism that lifts the dropped weight 32 to a predetermined height. The pressing mechanism 18 can also be considered, for example, as a lifting mechanism that raises and lowers the weight 32.

[0023] Furthermore, in the stamping apparatus 10 of this embodiment, stamping may be performed through steps including, for example, a weight placement step, a processing step, and a weight lifting step. In this case, the weight placement step may be considered, for example, as a step of placing the weight 32 at a predetermined height. In the weight placement step, for example, the weight 32 is attracted to the chuck 34 and then pulled up by the wire 38 to place the weight 32 at a predetermined height above the processing tool set 16. The processing step may be considered, for example, as a step of performing press processing on the plate-shaped member 50 by dropping the weight 32. In the processing step, for example, after placing the plate-shaped member 50 between the upper processing tool 22 and the lower processing tool 24, the chuck 34 stops attracting the weight 32, causing the weight 32 to fall by gravity from the predetermined height. In this case, the weight 32 falls freely and collides with the presser plate 26 while being accelerated by gravity. In this case, the impact force generated by the drop presses the upper processing tool 22 against the plate-like member 50, thereby performing press processing. In this case, for example, the weight 32 strikes the upper processing tool 22, causing the upper processing tool 22 to descend and engage with the lower processing tool 24. The weight lifting step can be considered, for example, as a step of lifting the weight 32 after it has been dropped. In the weight lifting step, for example, the chuck 34 is lowered to the position of the weight 32 after it has been dropped, and the weight 32 is attracted to the chuck 34. Then, the wire 38 is used to lift the weight 32 to a predetermined height. In the press processing apparatus 10, these steps can be repeatedly performed. In this case, the weight lifting step can be considered, for example, as a weight placement step performed before the next processing step.

[0024] According to this embodiment, for example, the plate-shaped member 50 can be appropriately pressed. As described above, the press working apparatus 10 may further include components identical or similar to those of known press working apparatuses 10 in addition to the components shown in the drawings. More specifically, the press working apparatus 10 may further include, for example, a transport mechanism for transporting the plate-shaped member 50 and a tool alignment mechanism. In this case, the transport mechanism transports the plate-shaped member 50 so that the plate-shaped member 50 moves intermittently between the upper tool 22 and the lower tool 24. This allows the transport mechanism to sequentially change the area to be processed in each processing step. As a tool alignment mechanism, for example, a guide pin or the like for aligning the upper tool 22 and the lower tool 24 can be used. In this case, for example, a guide pin or the like having a buffer mechanism for preventing the impact force generated when the weight 32 is dropped from being transmitted more than necessary to the lower tool 24 can be preferably used. As such a buffer mechanism, it is conceivable to use, for example, a cylinder or an elastic member such as a spring.

[0025] Next, the specific configurations of the upper processing tool 22 and the lower processing tool 24 in the processing tool set 16 will be described in more detail. First, the configuration of the upper processing tool 22 will be described. FIG. 2 is a diagram for explaining the characteristics of the upper processing tool 22 in more detail. FIGS. 2(a) and 2(b) are a bottom view and a cross-sectional view showing an example of the configuration of the upper processing tool 22. In this case, the bottom view can be considered, for example, as a view from the lower side in the direction of gravity in the press processing apparatus 10 (see FIG. 1). Furthermore, the cross-sectional view shown in FIG. 2(b) is a cross-sectional view taken along the dashed line AA in FIG. 2(a).

[0026] In this example, the upper processing tool 22 is an example of a one-sided mold that is pressed from one side against a plate-shaped member 50 (see FIG. 1) used as a workpiece. Also, in this example, the upper processing tool 22 is a mold for simultaneously performing shearing and drawing, and has a plurality of shearing sections 102 and a plurality of drawing sections 104. In this case, the mold can be considered, for example, as a mold member whose surface that comes into contact with the workpiece is made of metal. More specifically, in this example, the upper processing tool 22 is a mold that is pressed from above in the vertical direction against the plate-shaped member 50, and has a plurality of shearing sections 102a, b that are distinguished by the reference numerals 102a, b, and a plurality of drawing sections 104a, b that are distinguished by the reference numerals 104a, b.

[0027] Each of the multiple shearing sections 102a, b is a section for shearing the plate-shaped member 50 and has a cutting edge portion that functions as a cutting edge for shearing the plate-shaped member 50. In this case, the shearing can be considered, for example, as a process for cutting (shearing) a portion of the plate-shaped member 50. In this example, each of the shearing sections 102a, b is a recess formed on the lower surface of the upper processing tool 22, and at least a portion of the edge of the recess functions as a cutting edge portion to shear the plate-shaped member 50. In this case, the recess corresponding to each of the shearing sections 102a, b can be considered an example of a shearing recess. Furthermore, the shearing recess can be considered, for example, as a recess recessed in a direction away from the workpiece (plate-shaped member 50) at the position of the cutting edge portion. The direction away from the workpiece can be considered, for example, as a direction away from the plate-shaped member 50 when the upper processing tool 22 and the plate-shaped member 50 are installed in the press processing apparatus 10.

[0028] In this example, each of the multiple shearing sections 102a, 102b is a recess having edges formed by multiple closed paths, each surrounding the other. More specifically, the shearing section 102a is a recess having edges formed by an edge 112a shown by a solid line and an edge 114a shown by a dotted line in FIG. 2(a). The shearing section 102b is a recess having edges formed by an edge 112b shown by a solid line and an edge 114b shown by a dotted line. In this case, the edge 112a can be considered, for example, as a groove-like portion sandwiched between the edge 112a and the edge 114a. The edge 112b can be considered, for example, as a groove-like portion sandwiched between the edge 112b and the edge 114b. In the shearing section 102a, the edge 114a surrounds the outside of the edge 112a. In the shearing section 102b, the edge 112b surrounds the outside of the edge 114b. In this case, the inner edge, such as the edge 112a in the shearing section 102a and the edge 114b in the shearing section 102b, is an example of a first edge, which is an edge along a first closed path. Also, the outer edge, such as the edge 114a in the shearing section 102a and the edge 112b in the shearing section 102b, is an example of a second edge, which is an edge along a second closed path that surrounds the outside of the first edge.

[0029] In this case, it is also possible to use an edge portion corresponding to either the first edge portion or the second edge portion in each of the shearing sections 102a and 102b as a cutting edge portion. More specifically, in this example, in the shearing section 102a, of the edge portions 112a and 114a, the edge portion 112a functions as a cutting edge portion. In addition, in the shearing section 102b, of the edge portions 112b and 114b, the edge portion 112b functions as a cutting edge portion. In this case, of the edge portions of the shearing sections 102a and 102b, only the edge portion indicated by the solid line in FIG. 2(a) functions as a cutting edge portion. In this case, it is also possible to consider, for example, the edge portion 112a side of the shearing section 102a and the shoulder portion of the edge portion 112b of the shearing section 102b as cutting edges. Furthermore, in the upper processing tool 22 of this example, the recesses that become the shearing sections 102a, b are formed so as to surround an area corresponding to a portion of the plate-shaped member 50, as shown in the figure. In this case, surrounding an area corresponding to a portion of the plate-shaped member 50 can be considered, for example, as surrounding a portion of the lower surface of the upper processing tool 22, as shown in the figure. In this case, the cutting blade sections of each of the shearing sections 102a, b also surround an area corresponding to a portion of the plate-shaped member 50. With this configuration, for example, punching can be appropriately performed on the plate-shaped member 50 in a shape within the range surrounded by the cutting blade sections. The specific configuration of the shearing sections 102a, b will be described in more detail later.

[0030] Each of the multiple drawing portions 104a, b is a recess or protrusion for drawing the plate-shaped member 50. More specifically, in the illustrated configuration, the drawing portion 104a is a protrusion where the portion surrounded by the edge portion 122a shown by the dashed line in FIG. 2(a) is a protrusion. The drawing portion 104b is a recess where the portion surrounded by the edge portion 122b shown by the dashed line is a recess. The protrusions and recesses used as the drawing portions 104a, b can be the same as or similar to the protrusions and recesses formed in known drawing dies. When the upper processing tool 22 configured as described above is used, when the pressing mechanism 18 (see FIG. 1) presses the upper processing tool 22 toward the plate-shaped member 50, the cutting blades of the shearing portions 102a, b shear a portion of the plate-shaped member 50, and simultaneously, the plate-shaped member 50 is drawn at the positions corresponding to the drawing portions 104a, b. Therefore, according to this example, for example, shearing and drawing can be appropriately performed simultaneously on the plate-shaped member 50. This also allows various processes to be appropriately performed on the plate-shaped member 50 while appropriately preventing increases in the cost and time required for the processes. In this case, performing the shearing and drawing simultaneously can be considered, for example, as performing the shearing and drawing processes on the plate-shaped member 50 in parallel with a single pressing (pressure) in a press. Furthermore, when performing the shearing and drawing processes simultaneously using the upper processing tool 22 having the shearing portions 102a, b and the drawing portions 104a, b as in this example, the number of dies required can be reduced compared to, for example, using separate dies for shearing and drawing. This also makes it possible, for example, to reduce the manufacturing cost of the dies and the effort required for managing the dies. In this case, when manufacturing the mold, the sheared portions 102a, b and the drawn portions 104a, b of the upper processing tool 22 can be formed, for example, in one process, which also reduces the manufacturing cost of the mold.

[0031] As described above, in the upper processing tool 22 of this example, the cutting blades of the shearing portions 102a, b surround an area corresponding to a portion of the plate-shaped member 50. This configuration allows, for example, punching of the plate-shaped member 50 in a shape corresponding to the range surrounded by the cutting blades. In this case, for example, the portion to be punched in the punching process can be considered to be the portion that will become the finished product after processing. In such a case, for example, it is also possible to use the upper processing tool 22 to perform drawing on the portion to be punched in the punching process. More specifically, in this example, the upper processing tool 22 has drawing portions 104a, b within the area surrounded by the edge 112a, which becomes the cutting blade of the shearing portion 102a. This characteristic can also be considered, for example, as a configuration having at least one drawing portion within the area surrounded by the cutting blades. This configuration allows, for example, a variety of processes to be performed on the plate-shaped member 50. More specifically, in this example, the plate-like member 50 is processed by press working into a product 150 as shown in FIG. 2(c), for example.

[0032] FIG. 2(c) is a diagram showing an example of a product manufactured by press working performed by the press working apparatus 10 of this example, and shows an example of a product 150 manufactured by simultaneously performing shearing and drawing using the upper work tool 22 shown in FIGS. 2(a) and 2(b). The product 150 can be considered, for example, as an output of press working performed by the press working apparatus 10. As described above, the press working apparatus 10 of this example uses the upper work tool 22 having the shearing sections 102a, 102b and the drawing sections 104a, 104b to simultaneously perform shearing and drawing on the plate-like member 50. In this case, the product 150 can be considered to be separated, for example, at the positions of the shearing sections 102a, 102b, and to have deformed sections 154a, 154b, 154b deformed by drawing, formed at the positions of the drawing sections 104b, 104c. More specifically, when using the upper processing tool 22 shaped as shown in FIGS. 2(a) and 2(b), separation by shearing is performed along solid lines 162a and 162b, which indicate positions corresponding to the edges 112a and 112b of the shearing portions 102a and 102b of the upper processing tool 22. In this case, the position of the solid line 162a corresponds to the outer periphery of the product 150. The portion surrounded by the solid line 162b becomes the hole 152 formed within the product. The portions surrounded by the dashed lines 172a and 172b, which indicate positions corresponding to the edges 122a and 122b of the drawing portions 104a and 104b of the upper processing tool 22, become the deformed portions 154a and 154b by drawing. In this case, it can be considered that the product 150 is punched along the closed path indicated by the solid line 162a, and that further drawing and punching are performed within the area enclosed by the closed path indicated by the solid line 162a.

[0033] Next, the features of the lower processing tool 24 (see FIG. 1) used together with the upper processing tool 22 will be described in more detail. In the press processing device 10 of this example, the upper processing tool 22 and the lower processing tool 24, which has a shape that matches the upper processing tool 22, are used to press the plate-like member 50. In this case, the lower processing tool 24 can be considered as an example of an opposing member. The opposing member can be considered, for example, as a member that faces one of the molds across the workpiece. Furthermore, it is possible to use, for example, a processing tool having the configuration shown in FIG. 3 as the lower processing tool 24.

[0034] Fig. 3 is a diagram illustrating in more detail the features of the lower processing tool 24. In Fig. 3, the upper diagram is a cross-sectional view showing an example of the configuration of the lower processing tool 24 together with the upper processing tool 22 and the plate-like member 50. The lower diagram is a top view of the plate-like member 50 showing an example of the position where shearing and drawing are performed on the plate-like member 50.

[0035] When shearing and drawing are simultaneously performed on the plate-shaped member 50, as in this example, it is conceivable to use a lower processing tool 24 having a configuration including a portion for shearing and a portion for drawing. In this case, simply considering the above, it is conceivable to use a mold having a shape (e.g., concave-convex) corresponding to the shearing portions 102a, b and the drawing portions 104a, b of the upper processing tool 22 as the lower processing tool 24. However, when molds are used as both the upper and lower members sandwiching the plate-shaped member 50 in the press processing apparatus 10 (see FIG. 1 ), it is necessary to align the upper and lower molds with high precision so that the clearance at the shearing position is typically less than 10% (e.g., 7% or less) of the thickness of the plate-shaped member 50. In this case, using a thin plate-shaped member 50 is likely to increase the cost of aligning with the required precision. Furthermore, depending on the thickness of the plate-shaped member 50, it may even be difficult to align with the required precision. For example, when using a plate-like member 50 with a thickness of less than 1 mm (e.g., 100 μm or less), it may be difficult to properly align the plate-like member 50. Furthermore, when aligning the upper and lower dies in a configuration using upper and lower dies, the larger the size of the dies, the more difficult it usually is to align the dies with high precision. Regarding this point, as explained above, in this example, the upper processing tool 22 has the drawing portions 104a, 104b within the area surrounded by the cutting edge portions of the shearing portion 102a. In such a case, the larger the area surrounded by the cutting edge portions, the larger the size of the upper processing tool 22. As a result, when a standard die is used as the lower processing tool 24, it may be particularly difficult to align the upper processing tool 22 and the lower processing tool 24 with the required precision.

[0036] In contrast, press processing methods do not necessarily require the use of upper and lower dies. It is also possible to use rubber, a viscous material, or the like in place of one of the upper and lower dies. Therefore, instead of a conventional die, it is also possible to use a tool whose contact portion with the plate-like member 50 is made of rubber, a viscous material, or the like as the lower processing tool 24. When using such a lower processing tool 24, it is believed that shearing can be performed appropriately without the high-precision alignment typically required when using upper and lower dies. However, unlike shearing, in drawing, it is generally preferable to use dies as both the upper and lower processing tools to achieve high precision. Therefore, using a lower processing tool 24 with such a configuration may make it difficult to perform high-quality drawing. In this case, if shearing and drawing are performed simultaneously, as in this example, it is considered difficult to perform both shearing and drawing accurately.

[0037] In contrast, in this example, the lower processing tool 24 is a processing tool configured such that the portion for shearing and the portion for drawing are made of different materials. In this case, the lower processing tool 24 may be formed, for example, from rubber or a viscous material at the position where shearing is performed, and from metal at the position where drawing is performed. Furthermore, drawing can be performed appropriately without the need for high-precision alignment, as is typically required for shearing. Therefore, with this configuration, for example, high-quality drawing can be performed while eliminating the need for high-precision alignment at the position where shearing is performed.

[0038] More specifically, in this example, the lower processing tool 24 has a base portion 202 and multiple adjustable portions 204a, 204b. The base portion 202 is a portion that forms the basic shape of the lower processing tool 24. In this example, the base portion 202 is formed of metal and includes at least drawing portions 212a, 212b, which are portions of the lower processing tool 24 that perform drawing. In this case, the base portion 202 can also be considered, for example, as mold portions for performing drawing. The drawing portions 212a, 212b can also be considered, for example, as portions of the upper surface of the lower processing tool 24 that face the drawing portions 104a, 104b of the upper processing tool 22 across the plate-like member 50 during press working. In this case, the portions of the lower processing tool 24 that face the drawing portions 104a, 104b of the upper processing tool 22 can also be considered, for example, as being made of metal. Furthermore, in this example, the drawing portions 212a, b of the lower processing tool 24 are formed with convex portions or concave portions corresponding to the concave portions or convex portions of the drawing portions 104a, b of the upper processing tool 22. More specifically, the drawing portion 212a of the lower processing tool 24 is formed with concave portions corresponding to the convex portions of the drawing portion 104a of the upper processing tool 22. Furthermore, the drawing portion 212b of the lower processing tool 24 is formed with convex portions corresponding to the concave portions of the drawing portion 104b of the upper processing tool 22. With this configuration, for example, drawing can be appropriately performed on the plate-like member 50 at positions corresponding to the drawing portions 104a, b of the upper processing tool 22.

[0039] In this example, the lower processing tool 24 has variable portions 204a, 204b at positions corresponding to the shearing portions 102a, 102b of the upper processing tool 22. The variable portions 204a, 204b can be considered, for example, to be portions formed of a material that deforms in response to external forces generated during press work. In this case, the lower processing tool 24 can be considered, for example, to be formed of a material that deforms in response to pressure applied during press work, the portion of the lower processing tool 24 that faces the cutting edge portion of the upper processing tool 22 across the plate-like member 50 during press work. The lower processing tool 24 can also be considered, for example, to be formed of a material that deforms in response to external forces and another portion made of metal. Suitable materials for the variable portions 204a, 204b include, for example, rubber. In this case, rubber can be considered, for example, as an example of an elastic material. The variable portions 204a, 204b can be formed of, for example, a known material used in the Gerin method. In addition, the variable portions 204a, b may be made of a material other than rubber, such as a viscous, gel-like, slime-like, or jam-like substance. In this case, the variable portions 204a, b may be configured, for example, by containing such a material in a bag-like container. In this example, the variable portions 204a, b are an example of a deformable portion formed of a material that deforms in response to pressure applied during pressing. In this example, the periphery of the variable portions 204a, b on the upper surface of the lower processing tool 24 is formed from the metal that constitutes the base portion 202. The variable portions 204a, b protrude toward the plate-like member 50 compared to the surrounding metal region, as shown in the figure. Therefore, during pressing, the variable portions 204a, b contact the plate-like member 50 before the surrounding metal region.

[0040] With this configuration, when the pressing mechanism 18 (see FIG. 1) presses the upper processing tool 22 toward the plate-shaped member 50 during press working, the plate-shaped member 50 is pressed against the lower processing tool 24. In this case, the variable portions 204a, 204b deform appropriately in response to the pressing force and push the plate-shaped member 50 back toward the upper processing tool 22 at positions facing the cutting blades of the shearing portions 102a, 102b of the upper processing tool 22. This causes the plate-shaped member 50 to be separated at the positions of the cutting blades of the shearing portions 102a, 102b of the upper processing tool 22. Therefore, with this configuration, shear working can be appropriately performed on the plate-shaped member 50 at the positions of the shearing portions 102a, 102b of the upper processing tool 22. In this regard, according to Pascal's principle, it can be considered that the pressure at each position within the variable portions 204a, 204b is constant during press working. As a result, it can be considered that the pressure applied to each position of the shearing sections 102a, 102b in the upper processing tool 22 is also uniform. Therefore, according to this example, it is possible to apply uniform pressure to the plate-like member 50, for example, at the positions of the shear variable sections 204a, 204b in the lower processing tool 24. This also makes it possible, for example, to more appropriately process the plate-like member 50 with high precision.

[0041] Furthermore, in this case, the shearing can be performed by aligning the positional relationship between the shearing portions 102a, b of the upper processing tool 22 and the variable portions 204a, b of the lower processing tool 24 so that at least the cutting edge of the shearing portion 102a of the upper processing tool 22 faces the variable portions 204a, b of the lower processing tool 24. Therefore, according to this example, the alignment of the upper processing tool 22 and the lower processing tool 24 can be performed more easily than when, for example, a mold formed entirely of metal is used as the lower processing tool 24. Furthermore, it is preferable that the variable portions 204a, b of the upper processing tool 22 be formed with a margin, for example, in an area wider than the recesses that will become the shearing portions 102a, b of the upper processing tool 22. With this configuration, for example, alignment with the precision required for shearing can be performed more easily and appropriately. Furthermore, as explained above, in this example, forming the drawing portions 212a, b of the lower processing tool 24 from metal also makes it possible to perform drawing with high quality. Therefore, according to this example, it is possible to appropriately use the lower processing tool 24 configured to be suitable for simultaneous shearing and drawing, for example. This also makes it possible to more appropriately simultaneously perform shearing and drawing in the press processing apparatus 10, for example.

[0042] As explained above, when performing press working using upper and lower dies, the thinner the plate-shaped member 50 used as the workpiece, the more accurate the alignment becomes. Furthermore, when using large-sized upper and lower processing tools 22 and 24, it is usually more difficult to achieve high-accuracy alignment. In contrast, according to this embodiment, even when using a plate-shaped member 50 with a small thickness or when using large-sized upper and lower processing tools 22 and 24, shearing and drawing can be performed simultaneously with high accuracy and more appropriately. This also enables, for example, more appropriate high-quality and diverse press working. As the thin plate-shaped member 50, for example, a plate-shaped body with a thickness of less than 1 mm can be used. The thickness of the plate-shaped member 50 may be, for example, 100 μm or less (e.g., approximately 50 to 100 μm). Furthermore, as for the larger sized upper processing tool 22 and lower processing tool 24, when using a plate-shaped member 50 having a thickness of 1 mm or less, it is possible to use upper processing tool 22 and lower processing tool 24 whose longitudinal length of the range to be separated by shearing is about 10 cm or more (for example, about 8 to 50 cm).

[0043] In this example, with regard to the positional relationship between the shearing portion 102a of the upper processing tool 22 and the variable portion 204a of the lower processing tool 24, the variable portion 204a may be formed in a region including, for example, edges 112a, 114a (see FIG. 2) of the recess that will become the shearing portion 102a and a position facing this recess. In this case, the variable portion 204a may be formed so that the inner edge of the variable portion 204a is located inward relative to a position corresponding to edge 112a, which is the inner edge of the shearing portion 102a, and the outer edge of the variable portion 204a is located outward relative to a position corresponding to edge 114a, which is the outer edge of the shearing portion 102a. In this example, the variable portion 204a is formed so as not to include the positions of the drawing portions 212a, 212b corresponding to the drawing portions 104a, 104b of the upper processing tool 22. In this case, the variable portion 204a can be considered to be formed, for example, along a closed path surrounding the drawn portions 212a, 212b on the upper surface of the lower processing tool 24. In this case, the shape of the variable portion 204a in a top view can also be considered to be, for example, a ring shape including the drawn portions 212a, 212b. The shape of the variable portion 204a in a top view can also be considered to be, for example, a perforated planar shape (non-single-linked shape). In contrast, the variable portion 204b corresponding to the shearing portion 102b of the upper processing tool 22 can be formed without considering the positions of the drawn portions 104a, 104b on the upper processing tool 22 or the drawn portions 212a, 212b on the lower processing tool 24. Therefore, the variable portion 204b can be considered to be formed, for example, in a continuous range including the region corresponding to the entire shearing portion 102b on the upper processing tool 22. In this case, the shape of the variable portion 204b in a top view can also be considered to be, for example, a planar shape without holes (single-linked shape). Furthermore, depending on the shape of the sheared portion 102b, the variable portion 204b may also be formed in a shape that follows a predetermined closed path, similar to the variable portion 204a.

[0044] 3, shearing and drawing are performed on the plate-like member 50 at positions on the plate-like member 50 corresponding to the shearing portions 102a, b and the drawing portions 104a, b of the upper processing tool 22. In this case, as explained above, separation by shearing is performed along the solid lines 162a, b indicating positions corresponding to the edges of the shearing portions 102a, b of the upper processing tool 22 that will become the cutting edges, and drawing is performed on the portions of the upper processing tool 22 surrounded by the dashed lines 172a, b that correspond to the edges of the drawing portions 104a, b. In this example, the positions of the edges of the shearing portions 102a, b on the upper processing tool 22 that do not become cutting edges are cut off by shearing and do not remain in the product, as shown by dotted lines 164a, b in the figure. In this case, the recesses that become the shearing portions 102a, b on the upper processing tool 22 can also be considered to be formed outside the positions that will remain in the product. This configuration can appropriately prevent, for example, the effects of parts of the shearing portions 102a, b other than the cutting edges from remaining in the product.

[0045] Next, the shape of the shearing portions 102a, b in the upper processing tool 22 of this example will be described in more detail. FIG. 4 is a diagram illustrating the shape of the shearing portion 102 in the upper processing tool 22. In this example, it is possible to use a configuration in which the shearing portions 102a, b have the same cross-sectional shape, for example. Therefore, in the drawings described below, for convenience of illustration and explanation, the shearing portions 102a, b are simply illustrated as the shearing portion 102. Furthermore, the edge portions 112a, b and edge portions 114a, b of the shearing portions 102a, b are simply illustrated as the edge portion 112 and the edge portion 114.

[0046] FIG. 4(a) is a cross-sectional view showing an example of the shape of the shear processing portion 102. In this example, the shear processing portion 102 is a recess having edges 112 and 114 as edges, and has multiple side surfaces 302, 304, and a bottom surface 306. The side surface 302 is a side surface on the side of edge 112, which is one edge of the recess that will become the shear processing portion 102. As described above, in this example, the edge 112 of the shear processing portion 102 functions as a cutting edge. Therefore, as shown in the figure, the side surface 302 is a steep surface relative to the lower surface, which is the surface of the upper processing tool 22 that faces the plate-like member 50 (see FIG. 3), so that the edge 112 becomes a cutting edge. In addition, the side surface 304 is a side surface on the side of edge 114, which is the other edge of the recess that will become the shear processing portion 102. In addition, in the shear processing portion 102 of this example, the edge 114 is an edge that does not become a cutting edge. In this case, the fact that the edge portion 114 does not become a cutting edge portion can be considered, for example, as a result of shearing not being performed at a position corresponding to the edge portion 114 during press working. The position where shearing is not performed during press working can be considered, for example, as a position where shearing is not performed as a design intent. More specifically, in this example, the side surface 304 is inclined relative to the lower surface of the upper processing tool 22, as shown in the figure, so that the edge portion 114 does not become a cutting edge portion. In this case, for example, the side surface 304 can be inclined so that the shape of the edge portion 114 forms an obtuse angle in a cross section of the upper processing tool 22 perpendicular to the edge portion 114. The side surface 304 can also be formed, for example, as a surface having a rounded curved portion near the edge portion 114. The bottom surface 306 is a surface connecting the side surface 302 and the side surface 304. The bottom surface 306 can also be considered, for example, as the bottom surface of a recess that will become the shearing processing portion 102. In this example, the bottom surface 306 has a protrusion 312, as shown in the drawing. The protrusion 312 can be, for example, a portion of the bottom surface 306 that protrudes into the space inside the recess.

[0047] When using the shearing unit 102 configured as described above, it can be considered that, during pressing in a press, the recess that becomes the shearing unit 102 draws in, for example, a portion of the plate-shaped member 50 to be cut. In this case, the portion of the plate-shaped member 50 that is drawn into the recess that becomes the shearing unit 102 can be considered to be curved within the recess. Furthermore, it can be considered that, for example, this curvature generates a force in a direction away from the edge of the shearing unit 102 in the plate-shaped member 50 within the recess. This force can be considered, for example, to be a force in a direction away from the cutting edge on the side of the edge 112 that functions as the cutting edge. In this example, for example, by utilizing such a force, the plate-shaped member 50 can be appropriately cut at the position of the cutting edge of the shearing unit 102. Furthermore, in this case, when attention is paid to the operation of the lower processing tool 24 (see FIG. 3 ) that faces the upper processing tool 22 across the plate-shaped member 50, for example, when pressing, the lower processing tool 24 can be considered to push the plate-shaped member 50 into the recess that will become the shearing portion 102 and apply a force to a part of the plate-shaped member 50 in a direction away from the cutting edge portion. In this case, it can also be considered that, with the cutting edge portion of the shearing portion 102 of the upper processing tool 22 in the state where it is inserted into the plate-shaped member 50, the lower processing tool 24 pushes the plate-shaped member 50 toward this recess so that the plate-shaped member 50 curves in the recess that will become the shearing portion 102. The force in the direction away from the cutting edge portion can also be considered, for example, as a lateral force perpendicular to the lower surface of the upper processing tool 22.

[0048] Furthermore, in this example, by generating such a force in the direction away from the cutting blade portion, it is possible to appropriately shear the plate-shaped member 50 even under conditions where shearing is difficult by simply pressing the cutting blade portion against the plate-shaped member 50. In this case, by applying a force in the direction away from the cutting blade portion to a portion of the plate-shaped member 50, it is possible to more appropriately perform shearing, for example, when using a plate-shaped member 50 with a small thickness. More specifically, when the plate-shaped member 50 is thin, it is considered that deformation and elongation of the plate-shaped member 50 are likely to occur. In this case, if shearing is performed by simply pressing the cutting blade portion against the plate-shaped member 50, it is considered that deformation and elongation of the plate-shaped member 50 occur depending on the force with which the cutting blade portion is pressed, making it difficult to cut the plate-shaped member 50 at the position of the cutting blade portion. In contrast, in this example, by applying a force in the direction away from the cutting blade portion to a portion of the plate-shaped member 50 as described above, it is possible to more appropriately separate the plate-shaped member 50 at the position of the cutting blade portion compared to using a method such as simply pressing the cutting blade portion against the plate-shaped member 50. In this case, even if the thickness of the plate-shaped member 50 is about 50 μm (for example, about 40 to 80 μm), the plate-shaped member 50 can be appropriately cut at the position of the cutting blade. The shearing section 102 configured in this manner can also be considered to have a recessed structure for pulling in a part of the sheared plate-shaped member 50 to separate the cut end from the cutting blade.

[0049] In this example, the bottom surface 306 of the shearing section 102 has the convex portion 312 as described above. By using a shearing section 102 with such a shape, for example, a force for separating the cutting end from the cutting blade portion can be more appropriately generated. In this case, the convex portion 312 can be protruded, for example, from a position closer to the edge portion 112 than to the center of the region between the edge portion 112 and the edge portion 114 of the shearing section 102. With this configuration, for example, a force for separating the cutting end from the cutting blade portion can be more appropriately generated. In this case, for example, the bottom surface 306 can be considered to have a concave structure on the side closer to the edge portion 114 than the convex portion 312. In this case, the shearing section 102 can be considered to have a double concave structure, for example, with a second concave portion at the bottom of a first concave portion located in the area surrounded by the edge portion 112 and the edge portion 114. In this case, the first recess can also be considered as, for example, a recessed structure for creating a step that becomes the cutting edge of the shearing processing portion 102. The second recess can also be considered as, for example, a recessed structure for more reliably separating the cut end from the cutting edge.

[0050] When shearing is performed using a shearing section 102 having such a shape, it is conceivable that a portion of the plate-shaped member 50 will be drawn into the recess that will become the shearing section 102, causing deformation in this portion. For example, when a shearing section 102 having the shape shown in FIG. 4(a) is used, the portion of the plate-shaped member 50 sandwiched between the edge portions 112 and 114 will be subjected to a process similar to drawing. However, as can be understood from the above explanation, in this example, the portion that is subjected to such a process is a portion that is cut off by the shearing process and does not remain in the product. Therefore, even if such a process is performed, it can be considered that there will be no problem.

[0051] As described above, the edge 114 of the shearing section 102 is an edge that does not become a cutting edge. In this regard, the force generated when the plate-shaped member 50 is pulled into the recess that will become the shearing section 102 can be considered to be significantly reduced, for example, by the appropriate movement of the cut end of the plate-shaped member 50 when the plate-shaped member 50 is cut off at the position of the edge 112 that will become the cutting edge. Therefore, if the edge 114 has a shape that makes it more difficult to cut the plate-shaped member 50 than the edge 112, it can be considered not to become a cutting edge. Furthermore, in this case, the plate-shaped member 50 is not cut at the position of the edge 114, which can appropriately prevent, for example, the cut plate-shaped member 50 from remaining in the recess that will become the shearing section 102. Furthermore, in this case, since the cut plate-shaped member 50 does not remain in the recess, it is unnecessary to use, for example, a so-called stripper plate or the like. Therefore, the press working apparatus 10, the upper working tool 22, and the lower working tool 24 of this example can also be considered to have a configuration that does not include, for example, a stripper plate. Also, the press working apparatus 10 of this example can be considered to have a configuration that performs punching by pressing a die, without using a configuration that corresponds to a general punch. In this case, the press working apparatus 10 of this example can also be considered to perform punching on the plate-like member 50 with a relatively simple configuration that does not use, for example, a stripper plate or a punch.

[0052] Furthermore, the specific shape of the shear processing section 102 is not limited to the shape shown in FIG. 4(a) and can be modified in various ways. For example, the shape of the bottom surface 306 of the shear processing section 102 may be as shown in FIG. 4(b). FIG. 4(b) shows a modified shape of the shear processing section 102. The configuration shown in FIG. 4(b) can be considered, for example, to be a configuration in which the shape of the recessed structure on the bottom surface 306 of the shear processing section 102, described above as the second recess, is different from that shown in FIG. 4(a). Furthermore, the shapes of the side surfaces 302, 304, etc. of the shear processing section 102 are not limited to the shapes shown and can be modified in various ways. Furthermore, the shape of the shear processing section 102 may be, for example, a shape that does not have the protrusion 312 on the bottom surface 306.

[0053] FIG. 5 shows a further modified example of the shape of the shearing section 102. Except as described below, components in FIG. 5 denoted by the same reference numerals as those in FIGS. 1 to 4 may have the same or similar features as those in FIGS. 1 to 4. FIG. 5(a) shows an example of the shape of the shearing section 102 having a bottom surface 306 without a protrusion. In this case, the shearing section 102 also has a side surface 302, a side surface 304, and a bottom surface 306. The side surface 302 corresponds to the edge portion 112 that will become the cutting edge. The side surface 304 corresponds to the edge portion 114 that will not become the cutting edge. The bottom surface 306 is a surface connecting the side surface 302 and the side surface 304. Even with this configuration, the edge portion 112 that will become the cutting edge can appropriately shear the plate-like member 50.

[0054] Furthermore, the shearing portion 102 may be configured such that both the edge portion 112 and the edge portion 114 become cutting edges, as shown in FIG. 5(b). FIG. 5(b) shows an example of the shape of the shearing portion 102 in which multiple edge portions become cutting edges. In this case, as can be understood from the illustrated configuration, shearing is performed at the position of the shearing portion 102 so as to remove the portion that will enter the recess that will become the shearing portion 102. Therefore, it is conceivable that the portion of the plate-shaped member 50 facing the shearing portion 102 will become scrap and remain in the shearing portion 102 after cutting. Therefore, in this case, it is preferable that the shearing portion 102 be configured to appropriately remove such scrap. More specifically, in this case, it is conceivable that the recess that will become the shearing portion 102 will be a through-hole rather than a hole with a bottom. In this case, the shearing portion 102 can be considered to be a through-hole-like recess having, for example, side surfaces 302 and 304. In this case, it is also possible to tape the side surfaces 302, 304 of the shearing processing portion 102 so that the width increases with increasing distance from the plate-like member 50. With this configuration, for example, it is possible to appropriately remove punching waste that has entered the recess that will become the shearing processing portion 102. Furthermore, the shearing processing portion 102 having such a shape can also be considered, for example, as a female mold for punching.

[0055] In the above, the lower processing tool 24 has been described as having a variable portion 204 (see FIG. 3) made of rubber or the like at a position facing the shear processing portion 102 of the upper processing tool 22. However, in a modified configuration of the lower processing tool 24, depending on, for example, the conditions for press processing and the quality required for processing, the portion facing the shear processing portion 102 of the upper processing tool 22 may also be made of metal. In this case, the lower processing tool 24 can be considered, for example, as a mold or the like having a shape that matches the upper processing tool 22. In this case, it is also possible to use, as the lower processing tool 24, a mold having a shape as shown in FIG. 6 at a position facing the shear processing portion 102 of the upper processing tool 22.

[0056] FIG. 6 illustrates a modified configuration of the lower processing tool 24. Except as otherwise described below, components in FIG. 6 that are designated by the same reference numerals as those in FIGS. 1 to 5 may have the same or similar features as those in FIGS. 1 to 5. FIG. 6(a) is a cross-sectional view showing the configuration of the lower processing tool 24 of this modified example, and illustrates an example of the shape of the lower processing tool 24, along with a portion of the upper processing tool 22, near a position facing the shearing portion 102 of the upper processing tool 22. As shown in the figure, in this modified example, the upper processing tool 22 used with the lower processing tool 24 is a mold having a shearing portion 102 configured as shown in FIG. 4(a). Furthermore, the lower processing tool 24 may be identical to or similar to the lower processing tool 24 configured as shown in FIG. 3, except for the portion corresponding to the shearing portion 102 of the upper processing tool 22. In this case, the portion of the lower processing tool 24 corresponding to the shearing portion 102 of the upper processing tool 22 can be considered to be, for example, a portion that faces the shearing portion 102 across the plate-like member 50 when press processing is performed. Also, the lower processing tool 24 of this modified example can be considered to be, for example, a mold or the like in which at least the portions for performing shearing and drawing are made of metal. In this case, the portion of the lower processing tool 24 that corresponds to the shearing portion 102 of the upper processing tool 22 can also be considered to be made of metal.

[0057] More specifically, in this modification, the lower processing tool 24 has a convex portion 322 and a step 324 in a portion corresponding to the shearing portion 102 of the upper processing tool 22. The convex portion 322 is a protruding portion for pushing the plate-shaped member 50 (see FIG. 1 ), which is the workpiece, toward the upper processing tool 22 when pressed in the press process, and by protruding toward the upper processing tool 22 in at least a part of the range facing the recess that becomes the shearing portion 102, pushes a part of the plate-shaped member 50 into this recess. Furthermore, as a result, the convex portion 322 bends the plate-shaped member 50 in the recess of the upper processing tool 22 that is located at the opposing position, generating a force in a direction away from the edge portion 112 that becomes the cutting edge portion. Furthermore, in the lower processing tool 24, the step 324 is configured to mesh with the edge 112 that becomes the cutting edge in the shearing section 102 of the upper processing tool 22, and is formed at a position adjacent to the edge 112 on the side that becomes the recess that becomes the shearing section 102. With this configuration, for example, the meshing of the edge 112 of the upper processing tool 22 with the step 324 of the lower processing tool 24 allows the plate-like member 50 to be appropriately sheared.

[0058] In this modification, the relationship between the edge 112 of the shearing portion 102 of the upper processing tool 22 and the step 324 of the lower processing tool 24 can be considered to be, for example, that of a die and a punch. Therefore, the distance (clearance) between the edge 112 and the step 324 in a plane parallel to the lower surface of the upper processing tool 22 can be set to, for example, the same as the clearance between a die and a punch when performing general shearing using a mold. In this case, the clearance between the edge 112 and the step 324 can be set to, for example, approximately 7% or less of the thickness of the plate-like member 50. As described above, in this modification, the protrusion 322 of the lower processing tool 24 presses the plate-like member 50 into the recess of the upper processing tool 22, generating a force in a direction away from the edge 112, which becomes the cutting edge of the upper processing tool 22. In this case, even if the clearance between the edge 112 and the step 324 is large, the shearing can be performed more appropriately. Therefore, it may be possible to consider setting the clearance between the edge 112 and the step 324 to, for example, about 10% or more (for example, about 8 to 12%) of the thickness of the plate-like member 50.

[0059] In the figure, the letter A indicates the depth of the recess at the deepest portion of the recess that becomes the shearing portion 102 in the upper processing tool 22. The depth of the recess can be considered, for example, as a depth based on the position of the edge of the recess in a direction perpendicular to the lower surface of the upper processing tool 22. The letter B indicates the depth of the recess at the position of the protrusion 312 in the shearing portion 102. The letter C indicates the height of the protrusion 322 in the lower processing tool 24. The height of the protrusion 322 can be considered, for example, as a height from a surface that constitutes any part around the protrusion 322. More specifically, in the case shown in the figure, the height C of the protrusion 322 is the height from a surface of a part of the upper processing tool 22 that faces the edge 114 of the shearing portion 102. The letter D indicates the height of the step 324 in the lower processing tool 24. The height of the step 324 can be considered, for example, as the distance from the lower end to the upper end of the step 324 in a direction perpendicular to the upper surface of the lower processing tool 24. Furthermore, the letter E can be considered, for example, as the difference between the height of the outer side of the convex portion 322 on the upper surface of the lower processing tool 24 and the height of the outer side of the step 324. In this case, the height of the outer side of the convex portion 322 can be considered, for example, as the height of a portion of the upper surface of the lower processing tool 24 facing the edge portion 114 of the shearing portion 102 of the upper processing tool 22. The height of the outer side of the step 324 can be considered, for example, as the height of a portion of the upper surface of the lower processing tool 24 facing the edge portion 112 of the shearing portion 102 of the upper processing tool 22. Furthermore, in this modification, the depth A of the deepest portion of the recess that becomes the shearing portion 102 of the upper processing tool 22 can be considered to be greater than the depth B at the position of the convex portion 312. Furthermore, the height C of the convex portion 322 of the lower processing tool 24 can be considered to be smaller than, for example, the depth A of the shear processing portion 102 of the upper processing tool 22. In this case, the height C of the convex portion 322 is preferably smaller than the depth B of the position of the convex portion 312 in the shear processing portion 102. With this configuration, for example, it is possible to appropriately prevent the bottom surface 306 of the recess that becomes the shear processing portion 102 from colliding with the convex portion 322 of the lower processing tool 24.

[0060] As shown in the figure, the lower processing tool 24 of this modified example has a difference in height between the outside of the protrusion 322 and the outside of the step 324. More specifically, in the illustrated configuration, the outside of the step 324 is lower than the outside of the protrusion 322, resulting in a difference E greater than 0. In this case, the difference E can be considered, for example, as a distance for adjusting the depth of engagement between the edge 112 of the upper processing tool 22 and the step 324 of the lower processing tool 24. The difference E can also cause the upper processing tool 22 and the lower processing tool 24 to contact differently between a position facing the edge 114 of the shearing portion 102 of the upper processing tool 22 and a position facing the edge 112. This also makes it possible to adjust the cutting manner of the plate-like member 50, for example. More specifically, in this modified example, the direction in which the position of the upper processing tool 22 facing the edge portion 112 is lower than the position of the upper processing tool 22 facing the edge portion 114 is considered to be the positive direction, and the difference E can be set to, for example, a distance greater than 0 and smaller than the thickness of the plate-like member 50. With this configuration, for example, it is possible to more appropriately shear the plate-like member 50.

[0061] In the configuration shown in FIG. 6( a), the convex portion 322 of the lower processing tool 24 can be considered to be located opposite the convex portion 312 on the bottom surface 306 of the shearing section 102. In contrast, in a further modified configuration of the lower processing tool 24, the convex portion 322 of the lower processing tool 24 may be located in a position different from that shown in FIG. 6( a). FIG. 6( b) shows a further modified configuration of the lower processing tool 24. In the configuration shown in FIG. 6( b), the lower processing tool 24 also has the convex portion 322 and the step 324. In this modified configuration, the convex portion 322 is formed outside the position opposite the convex portion 312 on the shearing section 102 of the upper processing tool 22. More specifically, in the configuration shown in the figure, the convex portion 322 of the lower processing tool 24 is formed opposite the portion between the convex portion 312 and the edge portion 114 on the shearing section 102 of the upper processing tool 22. Furthermore, in this modified example, the convex portion 322 of the lower processing tool 24 can also be considered to be formed, for example, at a position facing the deepest portion of the shearing portion 102 of the upper processing tool 22. When the lower processing tool 24 of this modified example is used, for example, the convex portion 322 of the lower processing tool 24 can appropriately press a portion of the plate-like member 50 into the recess that becomes the shearing portion 102 of the upper processing tool 22 during pressing in the press process. This also makes it possible to generate, for example, a force in a direction away from the edge portion 112 that becomes the cutting edge portion of the shearing portion 102. Also in this modified example, the engagement between the edge portion 112 of the upper processing tool 22 and the step 324 of the lower processing tool 24 allows the plate-like member 50 to be appropriately sheared.

[0062] Furthermore, with regard to the configurations of the upper processing tool 22 and the lower processing tool 24, the above description mainly focuses on a configuration in which a recess is used as the shearing portion 102 of the upper processing tool 22. However, in a modified configuration of the upper processing tool 22 and the lower processing tool 24, the shearing portion 102 of the upper processing tool 22 may be formed in a convex shape instead of a concave shape, as shown in FIG. 7, for example. FIG. 7 shows the configuration of a further modified upper processing tool 22 and the lower processing tool 24. In this modified configuration, the upper processing tool 22 has a punch portion 332 as the shearing portion 102. Furthermore, the lower processing tool 24 has a die portion 334 located opposite the shearing portion 102 of the upper processing tool 22. In this case, the punch portion 332 that becomes the shearing portion 102 of the upper processing tool 22 can be considered, for example, as a convex portion that functions as a punch for punching in combination with the die portion 334 of the lower processing tool 24. The punch portion 332 can also be considered to be, for example, a portion corresponding to a male die for punching. In the case of this modification, for example, the edge of the surface of the punch portion 332 that faces the lower processing tool 24 can be considered to function as the cutting edge of the shear processing section 102. In this case, for example, the entire edge of the punch portion 332 can be considered to be the cutting edge.

[0063] Furthermore, the die portion 334 of the lower processing tool 24 can be considered, for example, as a recess that functions as a die for punching in combination with the punch portion 332 of the upper processing tool 22. The die portion 334 can also be considered, for example, as a portion corresponding to a female mold for punching. Even when using the upper processing tool 22 and the lower processing tool 24 configured in this manner, it is possible to appropriately perform shearing on the plate-like member 50. Also in this case, by using the upper processing tool 22 that further has a drawing portion and the lower processing tool 24 that has a shape that matches the upper processing tool 22, it is possible to appropriately perform shearing and drawing simultaneously.

[0064] Next, supplementary explanations regarding the above-described configurations and further variations will be provided. For ease of explanation, the configuration including the variations described above and below will be referred to as the present example. As explained above, in this example, the upper tool 22 is an example of a one-side die. The lower tool 24 is an example of an opposing member. However, depending on the configuration of the upper tool 22 and the lower tool 24, the lower tool 24 side may be considered an example of a one-side die, and the lower tool 24 side may be considered an example of an opposing member. More specifically, when the one-side die and the opposing member are considered more generally, they may be considered to overlap with each other, sandwiching the plate-like member 50 between them, with one side vertically on top. Depending on the configuration of the stamping apparatus 10, the upper tool 22 and the lower tool 24 described above may be used in an upside-down manner. In this case, the tool positioned vertically below may be considered an example of a one-side die. Furthermore, the processing tool on the upper side in the vertical direction can be considered as an example of an opposing member.

[0065] Furthermore, in a configuration in which the upper processing tool 22 uses a recess that becomes the shearing portion 102, as described above, by using the lower processing tool 24 to push the plate-shaped member 50 into this recess, a force in a direction away from the cutting edge portion of the shearing portion 102 can be applied to the plate-shaped member 50. In this case, it is also possible to separate the plate-shaped member 50, for example, when the tip of the cutting edge portion of the shearing portion 102 reaches a position halfway through the thickness of the plate-shaped member 50. More specifically, in this case, during pressing in the press working, the lower processing tool 24 applies a force in a direction away from the cutting edge portion of the shearing portion 102 of the upper processing tool 22 to a part of the plate-shaped member 50, for example, thereby separating the plate-shaped member 50 when the tip of the cutting edge portion reaches a position halfway through the thickness of the plate-shaped member 50.

[0066] In this regard, when shearing a plate-shaped member 50, for example, using a typical punch and die, if the cutting edge reaches the entire thickness of the plate-shaped member 50 and the plate-shaped member 50 is cut, so-called burrs are likely to occur at the separation position of the plate-shaped member 50, extending outward in the direction of the movement of the cutting edge during processing. In this case, for example, a burr removal process may be required in a subsequent process performed after press processing. In contrast, if the plate-shaped member 50 is separated when the cutting edge reaches a position halfway through the thickness of the plate-shaped member 50, such problematic burrs will not occur. More specifically, even if burrs are generated, they will likely only be small burrs that do not reach the outer side of the thickness of the plate-shaped member 50 and occur halfway through the thickness of the plate-shaped member 50. In this case, it is generally considered that no burr removal process, such as a burr removal process, will be necessary in a subsequent process. Therefore, with this configuration, for example, it is possible to make it difficult for problematic burrs to occur at the cutting position of the cutting blade portion of the shear processing portion 102.

[0067] Whether the plate-shaped member 50 has been separated when the cutting blade reaches a position halfway through the thickness of the plate-shaped member 50 can be determined, for example, by observing the state of the cut surface during shearing. More specifically, in this case, the timing when the plate-shaped member 50 has been separated can be determined based on the state of burrs formed on the cut surface. Depending on the configuration of the upper processing tool 22 and the lower processing tool 24, it may be possible to use a stopper or the like to adjust the amount by which the cutting blade of the shearing section 102 penetrates into the plate-shaped member 50. In this case, it may be possible to use a protrusion or the like having a height shorter than the thickness of the plate-shaped member 50 as the stopper. In this case, it may be possible to set the height of the protrusion to, for example, about 1 to 25% of the thickness of the plate-shaped member 50.

[0068] Also, a method for separating a workpiece without inserting the cutting edge through the entire thickness of the workpiece, such as a so-called half-blanking process, is known. However, in typical half-blanking processes, the workpiece is usually separated by a flat pressing process after pressing. Therefore, typical half-blanking processes can be considered different from the shearing process described in this example. Furthermore, when performing typical half-blanking processes that require a subsequent flat pressing process, if the workpiece is thin, the workpiece may deform during the flat pressing process, making it difficult to separate the workpiece. Therefore, in this case, it is usually necessary to use a workpiece with a certain thickness (e.g., approximately 1 mm or more). In contrast, in this example, shearing processes can be performed appropriately even when a plate-like member 50 with a thickness of less than 1 mm or 100 μm or less is used as the workpiece. Furthermore, for example, when using a plate-shaped member 50 having a thickness that allows for general half-punching processing, in a further modified configuration of the upper processing tool 22 and the lower processing tool 24, the upper processing tool 22 and the lower processing tool 24 may further have a half-punching processing portion, which is a part for performing general half-punching processing.

[0069] The above description has mainly focused on the case where the multiple shearing sections 102 (shearing sections 102a, b) in the upper processing tool 22 have the same shape. However, when the upper processing tool 22 has multiple shearing sections 102, it is also possible to use multiple types of shearing sections 102 with different shapes. In this case, for example, it is possible to use an upper processing tool 22 having shearing sections 102 in which only a portion of the edge becomes a cutting edge and shearing sections 102 in which the entire edge becomes a cutting edge. In this case, it is possible to use a shearing section 102 in which only a portion of the edge becomes a cutting edge, such as a recess, as shown in Figures 4 and 5(a), in which the edges are multiple closed paths, one of which surrounds the other, and only the edge corresponding to one of the closed paths becomes a cutting edge. In addition, it is possible to use a shearing section 102 in which the entire edge becomes a cutting edge, such as a recess, as shown in Figures 5(b) and 7. Furthermore, the shear processing portion 102 in which the entire edge portion becomes the cutting edge portion may have, for example, only an edge portion along one closed path, the entire edge portion becoming the cutting edge portion.

[0070] Furthermore, with regard to the configuration of the lower processing tool 24, the above description has mainly focused on a configuration in which only a portion of the lower processing tool 24 is provided with a variable portion made of a material that deforms in response to external forces generated during press working. However, depending on the precision and quality required for press working, it is also possible to use a lower processing tool 24 configured such that the entire lower processing tool 24 is a variable portion. In this case, the entire lower processing tool 24 being a variable portion can be considered to be, for example, the entire portion that contacts the plate-shaped member 50 to process the plate-shaped member 50 during press working. In this case, it is also possible to use a lower processing tool 24 made entirely of rubber. It is also possible to use a bag-like configuration in which, for example, a liquid or viscous material is sealed in a bag as the lower processing tool 24. In this case, it is possible to use a configuration in which the bag is made of a material (e.g., rubber) that has a tensile strength sufficient to withstand impacts generated during press working. It is also possible to use, for example, a powder or semi-solid substance as the substance sealed in the bag.

[0071] In the above, the configuration of the pressing mechanism 18 (see FIG. 1) in the stamping device 10 has been described, mainly in terms of a configuration that utilizes the impact force generated when the weight 32 (see FIG. 1) is dropped. In this case, the pressing mechanism 18 can be considered, for example, as a mechanism configured to drop the weight 32 from above the upper processing tool 22 and the lower processing tool 24. By using the pressing mechanism 18 configured in this manner, it is possible to appropriately apply, for example, a strong pressing force and a high press speed. This also makes it possible, for example, to appropriately simultaneously perform shearing and drawing on the plate-like member 50.

[0072] In addition, when performing press processing using the configuration of this example described above, a slow press speed may make it difficult to properly perform shear processing. For example, when using a lower processing tool 24 having an adjustable portion 204 (see FIG. 3), such as the lower processing tool 24 described with reference to FIG. 3, a slow press speed may cause the adjustable portion 204 to deform when the pressure applied to the plate-shaped member 50 is low, making it difficult to properly perform shear processing. Furthermore, when performing shear processing using the configuration of this example on a plate-shaped member 50 having a thickness of less than 1 mm (especially 100 μm or less), a slow press speed may cause the plate-shaped member 50 to deform without being separated at the cutting edge, making it difficult to properly perform shear processing. In contrast, when using a pressing mechanism 18 configured to drop a weight 32, for example, a simple configuration may allow proper press processing at a high press speed. In this case, the operation of the pressing mechanism 18 can be considered to be, for example, an operation of pressing at least one of the upper processing tool 22 and the lower processing tool 24 against the plate-shaped member 50 so that the plate-shaped member 50 is deformed without being cut at the position where drawing is performed, and press processing is performed at a press speed at which the plate-shaped member 50 is separated at the position where the cutting edge portion enters at the position where shearing is performed.

[0073] More specifically, the pressing mechanism 18 presses the upper processing tool 22 against the plate-like member 50 by dropping the weight 32 from a position vertically above the upper processing tool 22 and the lower processing tool 24 such that the speed of the weight 32 at the time of impact with the drop position is 3 m / s or greater. In this case, the impact force generated when the weight 32 impacts the positions of the upper processing tool 22 and the lower processing tool 24 is preferably set to, for example, 600,000 kgw or greater. This configuration allows the shearing and drawing processes to be performed simultaneously more appropriately, even when a thin plate-like member 50 is used. More specifically, for example, if the weight of the weight 32 is 100 kg and the pressing mechanism 18 drops the weight 32 from a height of 60 cm above the presser plate 26 (see FIG. 1 ), the impact force can be considered to be approximately 640,000 kgw (approximately 640 tons). The speed of weight 32 at the time of impact can be considered to be approximately 3.4 m / sec. Therefore, the weight of weight 32 can be considered to be, for example, approximately 50 to 200 kg (preferably, approximately 80 to 150 kg). The height from which weight 32 is dropped (height from presser plate 26) can be considered to be, for example, approximately 30 to 120 cm (preferably, approximately 40 to 80 cm).

[0074] The above description of the pressing mechanism 18 has mainly focused on a configuration in which the weight 32 is allowed to freely fall from a stationary state. However, in a modified configuration of the pressing mechanism 18, the weight 32 may be dropped by a method other than the above. In this case, for example, the weight 32 may be dropped by applying an initial velocity in the vertical downward direction. Furthermore, as the weight 32 falls, a force other than gravity may be applied to accelerate the weight 32. The above description of the pressing mechanism 18 has mainly focused on a configuration in which the weight 32 is raised and lowered using the chuck 34 and the wire 38 (see FIG. 1 ). However, in a further modified configuration of the pressing mechanism 18, the weight 32 may be raised and lowered by a different configuration. In this case, for example, an air cylinder-type lifting mechanism or a lifting mechanism using a hoist may be used. Furthermore, the pressing mechanism 18 may be configured in a manner other than the one in which the weight 32 is dropped. For example, if press processing can be performed at a press speed that corresponds to the thickness of the plate-like member 50, it is possible to use a servo method (servo press method) or a hydraulic method (hydraulic press method) to apply pressure during press processing. [Industrial Applicability]

[0075] The present invention can be suitably used in, for example, a press working device. [Explanation of symbols]

[0076] 10 Pressing device, 102 Shearing section, 104 Drawing section, 112 Edge, 114 Edge, 12 Base, 122 Edge, 14 Impact absorbing section, 150 Product, 152 Hole, 154 Deformation section, 16 Tool set, 162 Solid line, 164 Dotted line, 172 Broken line, 18 Pressing mechanism, 202 Base, 20 4 Variable portion, 212 Drawing portion, 22 Upper processing tool, 24 Lower processing tool, 26 Presser plate, 302 Side, 304 Side, 306 Bottom, 312 Convex portion, 32 Spindle, 322 Convex portion, 324 Step, 332 Punch portion, 334 Die portion, 34 Chuck portion, 36 Guide portion, 38 Wire, 50 Plate-shaped member

Claims

1. A press working device that performs press working on a plate-shaped workpiece, a one-side die that is pressed against the workpiece from one side of the workpiece; an opposing member that is a member that faces the one-side mold across the workpiece; a pressing mechanism that presses at least one of the one-side mold and the opposing member toward the workpiece; Equipped with The one-side mold is a shearing recess that is recessed in a direction away from the workpiece; a drawing portion which is a recess or a protrusion for performing drawing on the workpiece; and the shearing recess is a recess having a configuration in which a second recess is formed at the bottom of a first recess, At least a part of an edge of the first recess functions as a cutting edge that shears the workpiece, When the pressing mechanism presses at least one of the one-side die and the opposing member toward the workpiece, the cutting blade shears a portion of the workpiece, and simultaneously performs drawing on the workpiece at a position corresponding to the drawing portion, A press processing device characterized in that, during the pressing, the opposing member pushes a portion of the workpiece into the shearing recess, thereby applying a force to the portion of the workpiece in a direction away from the cutting blade.

2. In the opposing member, a portion of the one-side mold facing the drawing portion with the workpiece sandwiched therebetween is formed of metal, and a convex portion or a concave portion corresponding to the concave portion or the convex portion of the drawing portion of the one-side mold is formed in the metal portion; The press processing device according to claim 1, characterized in that the portion of the die facing the cutting blade across the workpiece when pressed is made of a material other than metal and deforms in response to the pressure received when pressed.

3. In the one-side die, the cutting blade surrounds an area corresponding to a portion of the workpiece, The one-side die has at least one drawing portion within a range surrounded by the cutting blade, The press processing device according to claim 1, characterized in that the portion of the opposing member that faces the cutting blade of the one-side die across the workpiece when pressed is formed of a member that deforms in response to the pressure received when pressed.

4. The press processing device according to claim 1, characterized in that, during the pressing, the opposing member applies a force to a portion of the workpiece in a direction away from the cutting blade, thereby separating the workpiece when the tip of the cutting blade reaches a position halfway through the thickness of the workpiece.

5. the one-side mold and the opposing member are overlapped with one side sandwiching the workpiece so that one side is on the upper side in the vertical direction, 2. The press processing device according to claim 1, wherein the pressing mechanism presses either the one-side die or the opposing member against the workpiece by dropping a weight from vertically above the one-side die and the opposing member under the condition that the speed at which the weight hits the drop position is 3 m / s or more.

6. A press working method for performing press working on a plate-shaped workpiece, comprising: a one-side die that is pressed against the workpiece from one side of the workpiece; an opposing member that is a member that faces the one-side mold across the workpiece; Using pressing at least one of the one-side die and the opposing member toward the workpiece; The one-side mold is a shearing recess that is recessed in a direction away from the workpiece; a drawing portion which is a recess or a protrusion for performing drawing on the workpiece; and the shearing recess is a recess having a configuration in which a second recess is formed at the bottom of a first recess, At least a part of an edge of the first recess functions as a cutting edge that shears the workpiece, When at least one of the one-side die and the opposing member is pressed toward the workpiece, a part of the workpiece is sheared by the cutting blade, and at the same time, a drawing process is performed on the workpiece at a position corresponding to the drawing portion, A press processing method characterized in that, during the pressing, the opposing member pushes a portion of the workpiece into the shearing recess, thereby applying a force to the portion of the workpiece in a direction away from the cutting blade.

7. A press working tool used in a press working device that performs press working on a plate-shaped workpiece, a one-side die that is pressed against the workpiece from one side of the workpiece; an opposing member that is a member that faces the one-side mold across the workpiece; Equipped with The one-side mold is a shearing recess that is recessed in a direction away from the workpiece; a drawing portion which is a recess or a protrusion for performing drawing on the workpiece; and the shearing recess is a recess having a configuration in which a second recess is formed at the bottom of a first recess, At least a part of an edge of the first recess functions as a cutting edge that shears the workpiece, By pressing at least one of the one-side die and the opposing member toward the workpiece, a shearing process is performed on a part of the workpiece by the cutting blade, and at the same time, a drawing process is performed on the workpiece at a position corresponding to the drawing portion, A press processing tool characterized in that, when pressed, the opposing member pushes a portion of the workpiece into the shearing recess, thereby applying a force to the portion of the workpiece in a direction away from the cutting blade.

Images