Press working device

Abstract

[Problem] To provide a press working device which is provided with a wiring path for performing electrical wiring from a wiring connector (terminal) on a side surface of an upper die without using a vibrator cover of a punch, and which is capable of improving visibility and workability and preventing electrical wiring and connection parts from being damaged by vertical movement. [Solution] In this pressing device, in which a vibrator is mounted on the upper part of a punch and a flange-shaped holding part provided in a middle part of the punch is held by being clamped by a punch retainer and a backing plate, the vibrator is housed in a sub-plate stacked on the upper part of the backing plate through a base plate, and a wiring path for electrically wiring the vibrator is provided in a groove extending to the vibrator from an upper side surface of the sub-plate.

Description

Press Processing Equipment

[0001] The present invention relates to a press processing device in which a vibrator is attached to the top of a punch, and in particular to a press processing device having a wiring path that allows easy electrical wiring to the vibrator and has a structure that can also be used as a cooling path.

[0002] Generally, separation processing, molding processing, etc. are known as press processing, and the equipment used for these processing is generally called press processing equipment. In press processing equipment, a workpiece such as sheet metal is placed between dies consisting of an upper die (also called a "punch") and a lower die (also called a "die"), and the workpiece is clamped and pressed between the upper and lower dies to process the workpiece into a desired shape.

[0003] Separation processes form shapes by cutting the workpiece. For example, punching, in which the workpiece is placed on a lower die and then punched with an upper die, is known. Forming processes, such as bending and drawing, are also known. However, separation processes can produce burrs and sagging at the beginning and end of the sheared surface, and the state of these burrs and sagging varies depending on the thickness and type of the workpiece, the processing speed, clearance, and other factors. Excessive sagging can impair the flatness of the sheared surface, posing a problem when flatness of the sheared surface is required. Furthermore, burrs have sharp edges, which can cause injury to people and lead to product damage and defects.

[0004] In forming, there is a risk of quality degradation due to scratches or cracks occurring during bending depending on the thickness and type of workpiece, processing speed, clearance, etc. In drawing, there is a risk of wrinkles or cracks occurring depending on the thickness and type of workpiece, processing speed, clearance, etc.

[0005] For example, a press working apparatus disclosed in Japanese Patent No. 6427438 (Patent Document 1) is known. That is, as shown in FIG. 1 , the press working apparatus 1 has a movable side portion (upper die) 2 having a punch 10 and a fixed side portion 3 having a lower die 30. The movable side portion 2 has the punch 10, a punch retainer 21A and a backing plate 21B that secure the punch 10, and a support body 23 that secures the punch retainer 21A and the backing plate 21B to an upper die holder 22. The upper die holder 22 and the support body 23 are secured by bolts 24A, and similarly, the support body 23 is secured by bolts 24B to the punch retainer 21A and the backing plate 21B. The punch 10 is secured by the punch retainer 21A and the backing plate 21B at a flange-shaped retaining portion 11 provided around the periphery of the punch 10 at a vertically midpoint on the outer surface, and is not secured at other portions. That is, when the punch 10 is vibrated by the vibrator 20, the vibration is not transmitted to the stripper 25 or the support 23.

[0006] The movable portion 2 also has a stripper 25 for removing the workpiece W when it adheres to the punch 10, a spring 26 for urging the stripper 25 toward the lower die 30, and a guide pin 27 for stabilizing the posture of the stripper 25. Furthermore, a vibrator 20 driven by a drive unit (not shown) is provided on the vibration end (upper surface) of the punch 10.

[0007] On the other hand, the fixed side portion 3 has a lower die 30 and a lower die holder 32 that fixes the lower die 30. The lower die 30 is a metal member having a predetermined thickness, and is stacked on the lower die holder 32 and fixed with bolts 34. The lower die 30 also has a hole 31 that has a shape corresponding to the shape of the punch 10, and a hole 33 that receives the guide pin 27. The press working device 1 also has a drive mechanism (not shown) for applying the force required for working to the die, a control mechanism (not shown) for controlling this, a safety device (not shown), etc.

[0008] 2 shows an example of a punch 10 in a perspective view, the punch 10 having a barrel-drum-shaped horizontal cross section with flange-shaped holding portions 11 disposed on both sides thereof, and a longitudinally elongated through-hole 12 drilled in the center of the body surface, the through-hole 12 being elongated in the vertical direction of the holding portion 11, i.e., so as to straddle the position of the holding portion 11 from top to bottom. Also, a mounting portion 13 is provided in the center of the top surface of the punch 10 for mounting a vibrator driven by a piezoelectric element with a screw or the like.

[0009] 3A and 3B show structural examples of a punch 50 having a circular horizontal cross section. In the example of Fig. 3A, a flange-shaped holding portion 51 is provided around the middle of the side surface of the punch 50 in the height direction, and a through-hole 52 having an elliptical cross section is drilled across the holding portion 51 from top to bottom. The holding portion 51 at the position where it intersects with the through-hole 52 is formed as a notch. In addition, a mounting portion 53 for mounting a vibrator is provided in the center of the top surface of the punch 50. In the example of Fig. 3B, no through-hole is drilled and no notch is provided in the holding portion 51, but the structure is otherwise similar to that of Fig. 3A.

[0010] Patent No. 6427438

[0011] An example of a conventional structure in which such a punch is mounted on a press processing device will be described with reference to the schematic diagram in Fig. 4. In this example, a punch 60 will be described which has a circular cross section, a holding portion 61 provided around the outer surface, and two separated through-holes 62A and 62B above and below the holding portion 61.

[0012] A vibrator 70 made of a piezoelectric element is attached to the top of the punch 60, and the vibrator 70, which is driven by electricity, is covered with a cap-shaped vibrator cover 73. On the top surface of the vibrator cover 73, a cooling valve 71 for feeding a refrigerant (such as air) to cool the vibrator 70, which generates heat, and a wiring connector 72 for electrical wiring to drive the vibrator 70 are provided. An electrical wiring 74 is connected from the wiring connector 72 to the vibrator 70, and power is supplied to the vibrator 70 and signals are exchanged between the vibrator 70 and the wiring connector 72. The power supply and signal exchange are carried out by separate electrical wiring (2 x 2 wires), but for convenience, these are shown as a single line in FIG. 4.

[0013] Furthermore, a holding portion 61 provided around the punch 60 is sandwiched and held by a punch retainer 64 and a backing plate 65. The lower portion of the punch 60 is housed in a stripper 63, the upper portion of the punch 60 is housed in a base plate 66, and the vibrator 70, the adapter portion, and the vibrator cover 73 are housed in a sub-plate 67.

[0014] As described above, in conventional press working devices, the vibrator 70 is covered with a vibrator cover 73, and power is supplied from the wiring connector 72 provided on the vibrator cover 73 via direct wiring 74 without a wiring path. This requires space for the vibrator cover, requires the upper die to be removed from the equipment when connecting terminals, and also results in poor visibility and workability, requiring time and effort for maintenance. Furthermore, there are problems such as a high risk of damage to the wiring and connectors because the vibrator (punch) moves up and down.

[0015] On the other hand, there are also multi-line stamping devices that can perform multiple punching operations in a single process. For example, a four-line stamping device has four lines of punches 60A-60D aligned in a row, as shown in the top perspective view of Figure 5(A) and the partial bottom perspective view of Figure 5(B). Each punch 60A-60D is fitted with a vibrator 70A-70D, and the vibrators 70A-70D are covered with a vibrator cover 73A-73D, respectively. The vibrator covers 73A-73D are housed so that their top surfaces are flush with the top surface of the sub-plate 67. The vibrator covers 73A-73D are also provided with the cooling valves 71A-71D and wiring connectors 72A-72D described above. The cooling valves 71A-71D cool the vibrators and their surroundings, and the wiring connectors 72A-72D provide power and signal transmission / reception.

[0016] 5B, for the sake of convenience, the base plate 66, the backing plate 65, the punch retainer 64, and the stripper 63 are omitted. Although four lines are shown in FIGS. 5A and 5B, the same applies to multiple lines of two or more lines.

[0017] In such a multi-series punch equipped with vibrators, a vibrator cover is provided for each vibrator, and refrigerant is supplied through a cooling valve provided on the top surface of the vibrator cover. Power is supplied to each punch and signals are exchanged via vibrator wiring from a wiring connector. Therefore, in addition to the problems with a single-series punch described above, depending on the molding shape, adjacent punches and vibrator covers may also be adjacent, causing interference between adjacent covers equipped with wiring connectors, making it impossible to position the punch in the desired position. In other words, the presence of a vibrator cover reduces the efficiency of punch layout. Since the electrical wiring for the vibrators is one per vibrator, the wiring is provided separately, further reducing space efficiency and making the wiring and connections even more complicated.

[0018] The present invention has been made in view of the above-mentioned circumstances, and an object of the present invention is to provide a stamping apparatus that has a wiring path for carrying electrical wiring from a wiring connector (terminal) on the side surface of the upper die without using a vibrator cover for the punch, thereby improving visibility and workability and preventing damage to the electrical wiring and connections due to up and down movement.

[0019] The present invention relates to a press processing device in which a vibrator is attached to the top of a punch, and a flange-shaped holding portion provided in the middle of the punch is clamped and held by a punch retainer and a backing plate. The above-mentioned object of the present invention is achieved in that the vibrator is housed in a sub-plate layered on top of the backing plate via a base plate, and a wiring path for electrically wiring the vibrator is provided in a groove that leads from the upper side surface of the sub-plate to the vibrator.

[0020] The present invention also relates to a multi-series press working device configured with a plurality of punch series in which a vibrator is attached to the top of a punch and a flange-shaped holding portion provided in the middle of the punch is clamped and held by a punch retainer and a backing plate, and the above-mentioned object of the present invention is achieved in that each of the vibrators is housed in a sub-plate layered on top of the backing plate via a base plate, and wiring paths for electrically wiring each of the vibrators are provided in grooves that branch out from the upper side surface of the sub-plate and lead to each of the vibrators.

[0021] According to the press working apparatus of the present invention, the electrical wiring for the vibrator is passed through a wiring path, which is a groove in the upper die (sub-plate), so that wiring is not direct and there is no need to provide a separate passage for the electrical wiring, thereby realizing a space-saving, low-cost press working apparatus. Furthermore, by wiring along the wiring path, relative movement between the vibrator and the electrical wiring is eliminated, preventing damage to the wiring and connectors due to up and down movement of the die. By passing the electrical wiring for the vibrator through the wiring path and arranging the connection terminals on the side surface of the upper die, there is no need to remove the upper die during maintenance, and visibility and workability are improved, shortening maintenance time.

[0022] Furthermore, the electrical wiring for the vibrator is passed through a wiring path, and the connection terminals are concentrated in one location on the side of the upper mold. The connection terminals are concentrated into one-touch connectors, which improves workability when connecting the terminals and reduces the risk of damage.

[0023] 8 is a configuration diagram showing an example of a general press working device; FIG. 9 is a perspective view showing an example of a punch (having a barrel-drum-shaped cross section); FIG. 10 is a perspective view showing an example of a punch (having a circular cross section); FIG. 11 is a schematic view showing a conventional example of how a punch is attached to a press working device; FIG. 12 is a perspective view of the top and bottom (part) of a conventional four-line press working device; FIG. 13 is a schematic view showing an example of how a punch is attached (wiring example) to a single-line press working device according to the present invention; FIG. 14 is a cross-sectional view showing an example of how a punch is attached (wiring example) to a single-line press working device according to the present invention; FIG. 15 is a partial development view of a single-line press working device according to the present invention; FIG. 16 is a cross-sectional view taken along lines X1-X2, Y1-Y2, and Z1-Z2 in FIGS. 7 and 8; FIG. 17 is a perspective view showing a perspective structure of a wiring connector (two terminals) and wiring; FIG. 18 is a partial plan view showing an example of an arrangement of a wiring connector; FIG. 19 is a cross-sectional view showing another example of wiring; FIG. 19 is a perspective view showing another example of a lid; FIG. 19 is a cross-sectional view showing another example of wiring (power supply line + signal line); FIG. 19 is a perspective view showing another structure of a wiring connector (four terminals) and wiring. 17 is a perspective view of the top and bottom (part) of a four-line stamping device according to the present invention. FIG. 18 is a partial development view of a stamping device according to the present invention. FIG. 19 is a cross-sectional view taken along lines X11-X12, Y11-Y12, and Z11-Z12 in FIG. 17. FIG. 19 is a perspective view showing a perspective structure and wiring of a wiring connector (8 terminals). FIG. 19 is a perspective view of a stamping device with another example of a cover attached. FIG. 20 is a cross-sectional view showing an example of wiring when a sensor is attached to each vibrator. FIG. 21 is a perspective view showing another structure (16 terminals) of a wiring connector and wiring.

[0024] The present invention relates to a press working apparatus (single-series and multi-series) in which a vibrator is attached to the top of a punch, and a flange-shaped holding portion provided in the middle of the punch is clamped and held by a punch retainer and a backing plate. The vibrator is not covered with a vibrator cover, but is housed in a sub-plate disposed above the backing plate via a base plate. A wiring path, which is a groove for passing electrical wiring, is provided in the top of the sub-plate, straddling the vibrator and passing along both sides of the vibrator, also serving as a cooling path. The groove-shaped wiring path extends from a side entrance of the sub-plate to the vibrator, and a power supply line that supplies at least power to the vibrator is laid from a wiring connector installed at the side entrance. A signal line that transmits and receives signals between the wiring connector and the vibrator as needed is connected between the wiring connector and the vibrator. Because the electrical wiring for the vibrator is laid through the wiring path, which is a groove in the sub-plate, there is no need to provide a separate electrical wiring passage, resulting in a space-saving, low-cost press working apparatus. Furthermore, by wiring through the wiring path, the relative movement between the vibrator and the electrical wiring is eliminated, preventing damage to the wiring and connectors due to the up and down movement of the mold.In addition, the wiring path can also be used as a cooling path for passing a refrigerant, providing both efficient wiring and cooling functions.

[0025] Furthermore, in a multi-line press processing device that enables multiple punch processing in one process, the structure allows wiring to each of the multi-line transducers from one wiring inlet, so wiring to each of the multi-line transducers can be performed efficiently, improving visibility and workability.In addition, even if there are a large number of wires, the wiring does not become messy, improving workability during installation and maintenance.

[0026] An embodiment of the present invention will be described below with reference to the drawings. The present invention is directed to the installation of a wiring path for electrical wiring to a vibrator (punch). However, since the wiring path can also be used as a cooling path for cooling the vibrator by feeding a refrigerant such as air, an embodiment of the present invention will be described in which both wiring and cooling are performed using a wiring path.

[0027] The schematic diagram of Fig. 6 corresponds to Fig. 4 and shows an example of mounting the punch 60 to the press working device according to the present invention, with its cross-sectional structure shown in Fig. 7 and its perspective structure shown in Fig. 8. Fig. 9 shows an expanded view of the lid 80 and the press working device, with Fig. 10(A) showing the cross-sectional structure taken along line X1-X2 of Fig. 7 and Fig. 8, Fig. 10(B) showing the cross-sectional structure taken along line Y1-Y2 of Fig. 7 and Fig. 8, and Fig. 10(C) showing the cross-sectional structure taken along line Z1-Z2 of Fig. 7 and Fig. 8.

[0028] As is clear from Figures 6 to 10, in the present invention, the conventional vibrator cover is eliminated, and a flange-shaped retaining portion 61 is provided around the outer middle portion of the punch 60. An upper through-hole 62A is provided in the upper body of the punch 60, and a lower through-hole 62B is provided in the lower body, straddling the position of the retaining portion 61. The two separate upper through-holes 62A and lower through-holes 62B function to adjust the resonant frequency of the vibrator depending on their sizes, and in the present invention, they also perform part of the cooling function by passing a refrigerant through them. As shown in Figure 7, the side of the retaining portion 61 is fitted and fixed to a brim retainer 68, and the upper and lower surfaces of the brim retainer 68 and the retaining portion 61 are sandwiched and held between a punch retainer 64 and a backing plate 65. In addition, a vibrator 70 is attached to the top of the punch 60 as in the conventional case, and the vibrator 70 is housed in a sub-plate 67, the upper body of the punch 60 is housed in a base plate 66, and the bottom part of the punch 60 is housed in a stripper 63.

[0029] A rectangular thin plate-like lid 80 as shown in Figures 8 and 9 is placed on the upper surface of the sub-plate 67, shielding the inside of the press (wiring path 67-1) from the outside. The positional relationship between the bottom surface of the lid 80 and the top of the vibrator 70 is such that a small space is provided, as shown in Figure 7. In this example, the lid 80 is shaped to cover the entire upper surface of the sub-plate 67, but any shape may be used as long as it can shield the wiring path 67-1 from the outside.

[0030] 6 and 7 , in order to wire and connect power supply lines 91 and 92 for supplying power from a drive unit or the like to the vibrator 70, a groove-shaped wiring path 67-1 is provided on the upper part of the sub-plate 67, and the power supply lines 91 and 92 are laid along the bottom surface of the wiring path 67-1. One end of the power supply lines 91 and 92 is connected to a wiring connector 90 arranged at the side entrance, and the other end is connected to the vibrator 70. By engaging (for example, by plugging in or one-touch) the connector from the drive unit side supply line with the wiring connector 90, power is supplied to the vibrator 70 via the power supply lines 91 and 92.

[0031] The wiring connector 90 has an external appearance that is rectangular, as shown in Fig. 11, with mating terminals 91A and 92A protruding from the front (outside) and power supply lines 91 and 92 connected to the rear (inside) side, which are electric wires, and the power supply lines 91 and 92 are connected to the internal vibrator 70. The wiring connector 90 may be located at a position retracted from the side surface of the sub-plate 67 as shown in Fig. 12(A), or may be on the same surface as the side surface of the sub-plate 67 as shown in Fig. 12(B), or may be installed on the bottom surface of the entrance. Furthermore, in the case of a plug-in type, the male-female relationship for the mating of the terminals 91A and 92A may be reversed. A one-touch connector may also be used.

[0032] 7 and 8 , a cross-sectional structure of the wiring path 67-1 taken along line X1-X2 is shown in FIG. 10(A), in which a linear groove is formed from a side entrance toward the vibrator 70, which curves symmetrically in a semicircular shape on both sides of the vibrator 70, and then merges and exits to the rear side. Power supply lines 91 and 92 are connected to a wiring connector 90 disposed on the bottom of the side as shown in FIG. 12(A) or 12(B), and the power supply lines 91 and 92 are laid on the bottom of the linear groove and fixed with fasteners 93A and 93B to prevent them from coming apart, and then connected to the vibrator 70. In FIG. 10(A), the power supply lines 91 and 92 are connected to the vibrator 70 in a straight line, but since the vibrator 70 moves up and down, they are actually connected with some slack.

[0033] When laying the power supply lines 91 and 92 in a linear trench, the two power supply lines 91 and 92 may be bundled together and wrapped in a tube 94 as shown in FIG.

[0034] As described above, the wiring path 67-1 is formed in a form that surrounds the vibrator 70, and therefore can also be used as a cooling path for the vibrator 70. In this case, a coolant such as air is introduced through a side inlet, and the coolant flows to both sides as it hits the vibrator 70, and is discharged from an outlet on the rear side. Since the lid 80 is installed on the top surface of the sub-plate 67, the coolant does not leak from the wiring path 67-1, and the flowing coolant can cool the direct heat generated by the piezoelectric element of the vibrator 70.

[0035] To cool the vibrator 70 and punch 60, as shown in Figures 8, 9, and 10(B), a cooling path 67-2 is provided below the sub-plate 67, and a refrigerant is fed in through an inlet on the side to cool the heat absorbed by the vibrator 70 of the punch 60. The cross-sectional structure of the cooling path 67-2 is shown in Figure 10(B), and it is provided below the sub-plate 67. The cooling path 67-2 is provided so as to straddle the vibrator 70 and pass through both side surfaces of the vibrator 70, and the refrigerant (air) is fed in through an inlet on the side. The refrigerant passes through a straight path from the inlet, passes through both side surfaces of the vibrator 70, and is then discharged from an outlet. This results in a significant cooling effect due to the passage of the refrigerant.

[0036] As shown in FIGS. 8, 9, and 10C, a cooling passage 64-1 is provided in the upper part of the punch retainer 64, through which a refrigerant is introduced from an inlet on the side surface to cool frictional heat generated in the holding portion 61 of the punch 60. The cross-sectional structure of the cooling passage 64-1 is shown in FIG. 10C, and the cooling passage 64-1 is provided in the upper part of the punch retainer 64. The cooling passage 64-1 is provided so as to straddle the punch 60, pass through both side surfaces of the punch 60, and pass through the lower through-hole 62B, and the refrigerant is introduced from the inlet on the side surface. The refrigerant passes through the passage from the inlet, passes through both side surfaces of the punch 60, passes through the lower through-hole 62B, and then is discharged from the discharge port. Because the refrigerant passes through the lower through-hole 62B of the punch 60, more effective cooling can be achieved.

[0037] It should be noted that the cooling paths 64-1 and 67-2 are not related to the electrical wiring, and therefore the cooling paths 64-1 and 67-2 may not be provided.

[0038] In the above description, the shape of the lid 80 is a rectangular thin plate, but the lid 81 may be the same shape as the planar shape of the wiring path 67-1 as shown in Figure 14, and the lid 81 may be fitted or fixed to the top of the wiring path 67-1 to shield the wiring path 67-1 from the outside.

[0039] Furthermore, in the above description, two power supply lines (91, 92) are used to supply power to the vibrator 70. However, as shown in FIG. 15, a temperature sensor 75 or the like may be attached to the vibrator 70 (or punch 60) to exchange signals with the drive unit. In such cases, two signal lines 95 and 96 are added and wired. For this reason, terminals 95A and 96A connected to the signal lines 95 and 96 as shown in FIG. 16 are provided on the front surface of the wiring connector 90. In addition to the temperature sensor 75, an acceleration sensor, a strain sensor, or the like may also be provided as a sensor.

[0040] In the above example, a press working apparatus with a single series of punch 60 and vibrator 70 has been described, but there are also multi-series press working apparatuses that are capable of punching multiple punches in one process, such as the four-series press working apparatus shown in Figure 5. The present invention can also be applied to such multi-series press working apparatuses, and will be explained using Figures 17 and 18 corresponding to Figure 5. Figure 17(A) is a top perspective view of the four-series press working apparatus, Figure 17(B) is a partial bottom perspective view, and Figure 18 shows an exploded view of the lid 82 and press working apparatus.

[0041] 17 and 18, a rectangular thin plate-like lid 82 is placed on the top surface of the sub-plate 67, shielding from the outside the wiring path 67-6 at the side entrance, the straight and L-shaped bent wiring path 67-7 from the side entrance, and the branch wiring paths 67-8A to 67-8D branching off from the wiring path 67-7. Even in a press working device configured with multiple punch series, the mounting structure for each punch is the same as that shown in FIG. 7, and in this example, four series, i.e., four punches 60A to 60D, are each equipped with vibrators 70A to 70D without vibrator covers, which are housed in a layered arrangement of a stripper 63, punch retainer 64, backing plate 65, base plate 66, and sub-plate 67. The upper part of the sub-plate 67 is provided with wiring paths 67-6, 67-7, 67-8A to 67-8D for passing electrical wiring, along with the lid 82.

[0042] The cross-sectional view of line X11-X12 in FIG. 17 is shown in FIG. 19(A), in which there is one entrance (67-6) to the wiring path, and straight and L-shaped wiring paths 67-7 are formed from the entrance 67-6 to each of the vibrators 70A to 70D, and branch wiring paths 67-8A to 67-8D are provided branching from the wiring path 67-7, and the branch wiring paths 67-8A to 67-8D are provided so as to straddle each of the vibrators 70A to 70D and pass through both side surfaces of each of the vibrators 70A to 70D. The side entrance is provided with a rectangular wiring connector 100 as shown in Figure 20, with eight terminals 101A-108A protruding from the front, and power supply lines 101-108 that supply power via the terminals 101A-108A are connected to the bottom of the wiring path, fixed with fasteners 110, 111, 112, and 113 to prevent them from coming undone, and connected to the vibrators 70A-70D. In Figure 19(A), the power supply lines 101-108 are connected to the vibrators 70A-70D in straight lines, but since the vibrators 70A-70D move up and down, they are actually connected with some slack. In this example, each part may also be wrapped in a tube 94 as shown in Figure 13.

[0043] As described above, the wiring paths 67-8A to 67-8D are formed in a manner that surrounds the vibrators 70A to 70D, and therefore the wiring paths 67-6, 67-7, 67-8A to 67-8D can be used as cooling paths for the vibrators 70A to 70D. In this case, a coolant such as air is introduced through a side inlet, and the coolant is branched and flows to both sides when it hits the vibrators 70A to 70D, and is discharged from an outlet on the rear side. Because the lid 82 is installed on the top surface of the subplate 67, the coolant does not leak from the wiring paths 67-6, 67-7, 67-8A to 67-8D, and the flowing coolant can cool the direct heat generated by each piezo element of the vibrators 70A to 70D.

[0044] To cool the vibrators 70A-70D and punches 60A-60D, as shown in FIGS. 17 and 18, a cooling path 67-4 is provided below the sub-plate 67. A refrigerant is introduced through an inlet on the side and passes through the path to cool the heat absorbed by the vibrators 70A-70D of the punches 60A-60D. The cross-sectional structure of the cooling path 67-4 is shown in FIG. 19B, and the cooling path 67-4 is provided below the sub-plate 67. The cooling path 67-4 is provided so as to straddle the vibrators 70A-70D and pass through both side surfaces of the vibrators 70A-70D, and the refrigerant (air) is introduced through an inlet on the side. The refrigerant passes through a straight path from the inlet, branches off and passes through both side surfaces of the vibrators 70A-70D, where it meets up and is then discharged from an outlet. This results in a significant cooling effect due to the passage of the refrigerant.

[0045] As shown in FIGS. 17 and 18 , a cooling passage 64-3 is provided in the upper part of the punch retainer 64, through which a refrigerant is introduced from an inlet on the side and passes through to cool the frictional heat generated in each holding portion of the punches 60A to 60D. The cross-sectional structure of the cooling passage 64-3 is shown in FIG. 19C , and the cooling passage 64-3 is provided in the upper part of the punch retainer 64. The cooling passage 64-3 is provided so as to straddle the punches 60A to 60D, pass through both side surfaces of the punches 60A to 60D, and pass through each lower through-hole, and the refrigerant is introduced through an inlet on the side. The refrigerant passes through the passage from the inlet, passes through both side surfaces of the punches 60A to 60D, passes through each lower through-hole, and then merges before being discharged from an outlet. Because the refrigerant passes through the lower through-holes 62B of the punches, more effective cooling can be achieved.

[0046] In this way, the refrigerant supplied through one inlet is branched into four passages, which individually cool the four vibrators 70A to 70D and the four punches 60A to 60D, thereby achieving efficient cooling.

[0047] It should be noted that the cooling paths 64-3 and 67-4 are not related to the electrical wiring, and therefore the cooling paths 64-3 and 67-4 may not be provided.

[0048] In the above description, the cover 82 is shaped like a rectangular thin plate, but the cover 83 may have the same planar shape as the wiring paths 67-6, 67-7, 67-8A to 67-8D as shown in FIG.

[0049] Furthermore, as shown in FIG. 22, when temperature sensors 70A-1 to 70D-1, etc. are provided on vibrators 70A to 70D, respectively, signals must be exchanged between the drive unit and temperature sensors 70A-1 to 70D-1. Therefore, as shown in FIG. 23, new terminals 121A to 128A are provided on the front surface of wiring connector 100, and are connected to temperature sensors 70A-1 to 70D-1 via signal lines 121 to 128.

[0050] In this example, a four-line stamping machine has been described, but other numbers of lines may be used. Also, in the examples of Figures 11, 14, 18, and 23, the terminals are shown arranged in a single horizontal row, but they may be arranged in two rows, etc.

[0051] 1 Pressing device 2 Movable side part (upper die) 3 Fixed side part 10, 50, 60 Punch 11, 51 Holding part 12, 52 Through hole 20, 70 Vibrator 22 Upper die holder 30 Lower die 31, 33 Hole 32 Lower die holder 60 Punch 61 Holding part 62A Upper through hole 62B Lower through hole 63 Stripper 64 Punch retainer 65 Backing plate 66 Base plate 67 Subplate 68 Brim retainer 71 Cooling valve 72 Wiring connector 73 Vibrator cover 74 Wiring 75 Temperature sensor 80 to 83 Lid 90, 100 Wiring connector 91, 92 Power supply line 94 Tube 95, 96 Signal line

Claims

1. A press processing device in which a vibrator is attached to the top of a punch and a flange-shaped holding portion provided in the middle of the punch is clamped and held by a punch retainer and a backing plate, characterized in that the vibrator is housed in a sub-plate layered on top of the backing plate via a base plate, and a wiring path for electrical wiring to the vibrator is provided in a groove extending from the upper side surface of the sub-plate to the vibrator.

2. The press working device according to claim 1, wherein the wiring path is provided so as to straddle the vibrator and pass along both sides of the vibrator, and also serves as a cooling path.

3. The press working device according to claim 1 or 2, wherein the upper part of the wiring path is covered with a lid.

4. The press working device according to claim 3, wherein a wiring connector is provided on the side surface of the upper portion, and the electrical wiring is laid at the bottom of the wiring path between the wiring connector and the vibrator.

5. The press working device according to claim 4, wherein the electrical wiring is a power supply line for supplying power to the vibrator and a signal line for transmitting and receiving signals between the vibrator and a sensor attached to the punch.

6. A multi-series press working device comprising a plurality of punch series in which a vibrator is attached to the top of a punch and a flange-shaped holding portion provided in the middle of the punch is clamped and held by a punch retainer and a backing plate, wherein each of the vibrators is housed in a sub-plate layered on top of the backing plate via a base plate, and wiring paths for electrically wiring each of the vibrators are provided in grooves that branch out from the upper side surface of the sub-plate and lead to each of the vibrators.

7. The press working device according to claim 6, wherein said wiring paths are provided so as to straddle each of said vibrators and pass along both sides of each of said vibrators, and also serve as cooling paths.

8. The press working device according to claim 6 or 7, wherein the upper part of the wiring path is covered with a lid.

9. The press working device according to claim 8, wherein a wiring connector is provided on the side surface of the upper portion, and the electrical wiring is laid at the bottom of the wiring path between the wiring connector and each of the vibrators.

10. The press working device according to claim 9, wherein the electrical wiring is a power supply line that supplies power to each of the vibrators and a signal line that transmits and receives signals between a sensor attached to each of the vibrators or each of the punches.

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