Press working device

Abstract

[Problem] To provide a press working device that is provided with a cooling passage that channels a refrigerant for suppressing or preventing heat generation in a vibrating element as well as transferred heat and frictional heat in a punch, said press working device making it possible to improve the quality of press working without any effect from heat generation. [Solution] A press working device in which a vibrating element is mounted on the upper part of a punch, and a flange-form holder provided in a section partway along the punch is clamped securely by a punch retainer and a backing plate, wherein the vibrating element is accommodated in a sub-plate layered on the upper part of the backing plate with a base plate therebetween, and a refrigerant-channelling cooling passage is provided on the upper part of the sub-plate so as to straddle the vibrating element and pass through both side surfaces thereof.

Description

Press Processing Equipment

[0001] The present invention relates to a press processing device equipped with a punch and a vibrator, and more particularly to a press processing device having a structure equipped with a cooling path for passing a refrigerant to suppress or prevent heat generation in the vibrator and punch.

[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 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.

[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 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 on the top surface of the cover 73. 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. A holding portion 61 provided around the periphery of 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, adapter portion, and cover 73 are housed in a sub-plate 67.

[0013] In this way, in conventional press working devices, the vibrator 70 is covered with the cover 73, and heat generated by the piezoelectric element that constitutes the vibrator 70 is cooled by feeding a coolant such as air through the cooling valve 71. For this reason, in addition to ensuring space for the cover 73, there is a problem that areas not covered with the cover 73, such as the vicinity of the holding portion 61, cannot be cooled or cooling is insufficient.

[0014] Furthermore, the punch 60 generates heat due to repeated expansion and contraction caused by the vibration amplitude of the vibrator 70. The punch is also heated by the heat transferred from the vibrator 70. Furthermore, the holding portion 61 of the punch 60 is sandwiched and held between the punch retainer 64 and the backing plate 65, which causes horizontal vibrations of Poisson's ratio, among the vertical vibrations, resulting in frictional heat generation. Furthermore, the punch has heat distribution, such as hot and cold spots, which causes changes in the clearances set between each part, resulting in wear and galling. In particular, changes in the clearance between the punch (heat generation) and the die can lead to problems such as deterioration of product quality. However, the reality is that no countermeasures have been taken to prevent such frictional heat in the past.

[0015] On the other hand, there are also multi-line stamping devices that are capable of punching multiple punches in a single process. For example, a four-line stamping device has four lines of punches 60A-60D aligned, as shown in the top perspective view of Figure 5(A) and the partial bottom perspective view of Figure 5(B). Vibrators 70A-70D are attached to the punches 60A-60D, respectively, and covers 73A-73D are placed over the vibrators 70A-70D, with the covers 73A-73D housed so that their top surfaces are flush with the top surface of the sub-plate 67. The covers 73A-73D are also provided with the cooling valves 71A-71D and wiring connectors 72A-72D described above, which are used for cooling the vibrators and their surroundings, supplying power, and transmitting and receiving signals.

[0016] In FIG. 5B, for convenience, the base plate 66, the backing plate 65, the punch retainer 64, and the stripper 63 are omitted.

[0017] In such a punch with multiple series equipped with vibrators, a cover is provided for each vibrator, and a coolant is introduced through a cooling valve on the top surface of the cover, but depending on the molding shape, the punches may be adjacent to each other and the vibrators may also be adjacent, and the adjacent covers with attached cooling valves may interfere with each other, making it impossible to arrange the punches in the specified positions. In other words, the presence of the vibrator covers causes a problem of poor punch layout efficiency.

[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 press working device that is equipped with a cooling path through which a refrigerant passes in order to suppress or prevent heat generation from the vibrator, frictional heat from the punch, and heat transfer, and that is capable of improving the quality of press working without being affected by heat generation.

[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 by having the vibrator housed in a sub-plate layered on top of the backing plate via a base plate, and having a first cooling path for passing a coolant through the top of the sub-plate straddling the vibrator and passing through both side surfaces of the vibrator.

[0020] The present invention also relates to a multi-line stamping device that is configured with a plurality of punch lines, each of which has a vibrator attached to the top of the punch and has a flange-shaped holding portion provided in the middle of the punch that is clamped and held by a punch retainer and a backing plate. The above-mentioned object of the present invention is achieved in that each of the vibrators is housed in a sub-plate that is layered on top of the backing plate via a base plate, a first cooling path for passing a coolant is provided on the top of the sub-plate, there is one first inlet of the first cooling path, passages branch out from the first inlet to each of the vibrators, and each of the branched passages is arranged to straddle each of the vibrators and pass through both side surfaces of each of the vibrators.

[0021] According to the press working device of the present invention, the cover with the cooling valve is eliminated and a cooling path is provided, and cooling is performed by passing a refrigerant such as air through the cooling path, so that the heat-generating part can be cooled reliably, and since it is not an external structure, the device can be made more compact. Furthermore, since the entire punch can be cooled in addition to cooling the vibrator, heat generation in the punch is suppressed or prevented, and press working that is not affected by temperature can be performed. Furthermore, since separate cooling paths are provided and the vibrator and punch can be cooled separately, detailed and economical temperature control can be easily achieved.

[0022] Furthermore, if the punch is provided with a through hole, cooling can be performed by passing a refrigerant through the through hole, so that cooling can be performed more efficiently.

[0023] In a multi-line press processing device in which multiple punches are aligned, cooling paths are provided for each vibrator and each punch, branching from a single inlet, which saves labor in connection work and reduces the number of cooling devices.

[0024] 1. A configuration diagram showing an example of a general press working apparatus. 2. A perspective view showing an example of a punch (having a barrel-drum-shaped cross section). 3. A perspective view showing an example of a punch (having a circular cross section). 4. A schematic diagram showing a conventional example of mounting a punch to a press working apparatus. 5. A perspective view of the top and bottom (part) of a conventional four-line press working apparatus. 6. A schematic view showing an example of mounting a punch to a press working apparatus according to the present invention. 7. A cross-sectional view showing an example of mounting a punch to a press working apparatus according to the present invention. 8. A perspective view showing an example of mounting a punch to a press working apparatus according to the present invention. 9. A partial development view of a press working apparatus according to the present invention. 10. A perspective view and a partial cross-sectional view showing an example of a press working apparatus according to the present invention, with the lid removed. 11. A cross-sectional view taken along lines X1-X2 and Y1-Y2 of FIGS. 7 and 10. 12. A schematic view showing the flow of air (refrigerant) in a cooling path. 13. A perspective view showing another example of a lid. 14. A perspective view of a press working apparatus with the lid shown in FIG. 13 mounted. 15. A perspective view of the top and bottom (part) of a four-line press working apparatus according to the present invention. 16. A partial development view of a press working apparatus according to the present invention. 17. A perspective view of an example of a press working apparatus according to the present invention, with the lid removed. Fig. 20 is a cross-sectional view taken along the lines X11-X12 and Y11-Y12 of Fig. 17. Fig. 21 is a schematic view showing another example of the flow of air (refrigerant) in the cooling path. Fig. 22 is a perspective view showing another example of the lid. Fig. 23 is a perspective view of the press working device equipped with the lid shown in Fig. 20.

[0025] The present invention is 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 sandwiched and held by a punch retainer and a backing plate, the vibrator is housed in a sub-plate that is arranged on the top of the backing plate via a base plate, and a cooling passage for passing a coolant is provided in at least the top of the sub-plate so as to straddle the vibrator and pass both side surfaces of the vibrator, and cooling passages are provided in the bottom of the sub-plate and the top of the punch retainer, or in the top or bottom of the base plate, the cooling passage in the bottom of the sub-plate is provided so as to straddle the uncovered vibrator and pass both side surfaces of the vibrator, and the cooling passage in the top of the punch retainer is provided so as to straddle the punch and pass both side surfaces of the punch.

[0026] A coolant such as air is introduced into the cooling passages through an inlet, and the coolant passes through both sides of the punch and vibrator for cooling. In addition, in the case of a punch having through-holes above and below the punch that straddle the retaining portion, more effective cooling can be achieved by passing the coolant through the through-holes as well. These cooling passages are each provided at a separate height position of the punch, allowing for independent cooling, thereby enabling economical and efficient cooling tailored to the heat-generating portion. Specifically, the cooling passage in the upper part of the sub-plate suppresses heat generation from the vibrator, the cooling passages in the lower part of the sub-plate and the upper part of the base plate suppress heat transfer from the vibrator, and the cooling passages in the lower part of the base plate and the upper part of the punch retainer suppress frictional heat.

[0027] Furthermore, in a multi-line press processing device that allows multiple punches to be processed in one process, the device is configured with a branched cooling path for sending refrigerant from a single inlet to multiple lines of punches and vibrators, so that the multiple lines of punches and vibrators can each be cooled in the same way, and refrigerant inlet and outlet management is easy, enabling efficient cooling to be achieved.

[0028] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[0029] The schematic diagram of Fig. 6 shows an example of mounting a punch 60 to a press working apparatus according to the present invention, corresponding to Fig. 4, with its cross-sectional structure shown in Fig. 7 and its perspective structure shown in Fig. 8. Fig. 9 shows an exploded view of the lid 80 and press working apparatus, with Fig. 10(A) showing an example of a perspective structure of the press working apparatus with the lid 80 removed, and Fig. 10(B) showing the cross-sectional structure taken along line Z1-Z2 of Fig. 10(A).

[0030] As is clear from FIGS. 6 to 10 , the conventional vibrator cover has been eliminated in the present invention. Instead, a flange-shaped retaining portion 61 is provided around the outer midsection 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 upper through-hole 62A and the lower through-hole 62B adjust the resonant frequency of the vibrator and also serve as part of a cooling path in the present invention. As shown in FIG. 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. A vibrator 70 is attached to the top of the punch 60, as in the conventional case. 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 of the punch 60 is housed in a stripper 63.

[0031] 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 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 is acceptable as long as it can shield the cooling path 67-1 from the outside.

[0032] In the present invention, in order to suppress or prevent heat generation in the vibrator 70 and punch 60, a cooling passage is provided that cools at least the vibrator 70, which generates heat using a piezoelectric element, with a refrigerant such as air without being covered. Specifically, a cooling passage 67-1 is provided in the upper part of the sub-plate 67 for introducing and passing a refrigerant through a side inlet, and a lid 80 is attached to the upper surface of the sub-plate 67, so that the refrigerant does not leak from the cooling passage 67-1 and directly cools the heat generated by the piezoelectric element of the vibrator 70. Furthermore, a cooling passage 67-2 is provided in the lower part of the sub-plate 67 for introducing and passing a refrigerant through a side inlet, so as to cool the heat received from the vibrator 70 of the punch 60. Furthermore, a cooling passage 64-1 is provided in the upper part of the punch retainer 64 for introducing and passing a refrigerant through a side inlet, so as to cool the frictional heat generated in the holding portion 61 of the punch 60. The cross-sectional perspective structure taken along line Z1-Z2 of FIG. 10(A) is shown in FIG. 10(B).

[0033] 11A shows the cross-sectional structure of the cooling path 67-2 taken along line X1-X2 in FIGS. 7 and 10A, with the cooling path 67-2 provided in the lower part of the sub-plate 67. The cooling path 67-2 is provided so as to straddle the oscillator 70 and pass through both side surfaces of the oscillator 70, and as shown in FIG. 12A, a refrigerant (air) is fed into the cooling path 67-2 from an inlet on the side. The refrigerant passes through the passage from the inlet, passes through both side surfaces of the oscillator 70, joins together, and is then discharged from the outlet. This results in a great cooling effect due to the passage of the refrigerant.

[0034] 11B shows the cross-sectional structure of the cooling path 64-1 taken along line Y1-Y2 in FIGS. 7 and 10A, with the cooling path 64-1 provided above the punch retainer 64. The cooling path 64-1 straddles the punch 60, passes through both side surfaces of the punch 60, and passes through the lower through-hole 62B. As shown in FIG. 12B, a refrigerant is fed into the cooling path 64-1 from an inlet on the side. The refrigerant flows from the inlet through a passage, passes through both side surfaces of the punch 60, passes through the lower through-hole 62B, joins together, and is then discharged from an outlet. Because the refrigerant passes through the lower through-hole 62B of the punch 60, more effective cooling can be achieved.

[0035] In the above description, the shape of the lid 80 is a rectangular thin plate, but the lid 81 may have the same shape as the planar shape of the cooling path as shown in Fig. 13, and may be fitted or fixed to the top of the cooling path 67-1 to shield the cooling path 67-1 from the outside, as shown in Fig. 14. It is desirable that the lids 80 and 81 have thermal insulation properties.

[0036] 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 a single 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 15 to 17 corresponding to Figure 5. Figure 15(A) is a top perspective view of the four-series press working apparatus, Figure 15(B) is a partial bottom perspective view, Figure 16 shows the lid 82 and press working apparatus in an expanded state, and Figure 17 is an example of a perspective structure of the press working apparatus with the lid 82 removed.

[0037] 15 to 17, a rectangular thin plate-shaped cover 82 is placed on the upper surface of the sub-plate 67, and shields the cooling paths 67-6, 67-7, 67-8A to 67-8D, and 67-9A to 67-9D from the outside. A cooling path 67-4 is provided in the lower part of the sub-plate 67, and the cross-sectional structure of the cooling path 67-4 taken along line X11-X12 in Fig. 17 is shown in Fig. 18(A). Furthermore, a cooling path 64-3 is provided in the upper part of the punch retainer 64, and the cross-sectional structure of the cooling path 64-3 taken along line Y11-Y12 in Fig. 17 is shown in Fig. 18(B).

[0038] In a press working device configured with multiple punch series, the mounting structure for each punch is the same as that shown in Figure 7, and in this example, four series are mounted, i.e., four punches 60A to 60D are mounted with oscillators 70A to 70D without oscillator covers, respectively, and these are housed in a layered stripper 63, punch retainer 64, backing plate 65, base plate 66, and sub-plate 67. A cooling path 67-7 for passing a refrigerant is provided on the upper part of the sub-plate 67 together with a lid 82. The cooling path 67-7 has a single inlet 67-6, and passages (67-8A to 67-8D) branch off from the inlet 67-6 on the side to each of the oscillators 70A to 70D, and each of the branched passages 67-8A to 67-8D is arranged to straddle each of the oscillators 70A to 70D and pass through both side surfaces of each of the oscillators 70A to 70D. 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.

[0039] A cooling passage 67-4 for passing a refrigerant is also provided in the lower part of the sub-plate 67, the cross section of which is shown in Figure 18(A). Similarly, a cooling passage 64-3 for passing a refrigerant is also provided in the upper part of the punch retainer 64, the cross section of which is shown in Figure 18(B).

[0040] As shown in Fig. 19(A), the cooling path may be branched from a single inlet by branch paths to send the refrigerant to each of punches 60A and 60B. Alternatively, as shown in Fig. 19(B), a converging discharge path may be provided to discharge the refrigerant from a single discharge port. Although Figs. 19(A) and 19(B) each show two lines, the same applies to multiple lines of three or more lines.

[0041] In the above description, the lid 82 is shaped like a rectangular thin plate. However, as shown in FIG. 20(A) or 20(B), the lid 83 or 83A may be shaped to match the planar shape of the cooling passages. As shown in FIG. 21, the lid 83 may be fitted or fixed to the cooling passages 67-7, 67-8A to 67-8D, and 67-9A to 67-9D to shield each cooling passage from the outside. The same applies to the lid 83A. The lid 83 in FIG. 20(A) is an example manufactured by combining and fixing skewer-shaped plate lids 83-1 to 83-4 for each cooling passage, a long plate 83-5, and an L-shaped plate 83-6. FIG. 20(B) shows an example manufactured as an integrated unit. It is desirable that both the lids 82 and 83 (83A) have thermal insulation properties.

[0042] In the above example, a cooling path is provided in the lower part of the sub-plate 67, but a cooling path may be provided in the upper or lower part of the base plate 66. The cooling path may be provided in an appropriate position that can suppress or prevent heat generation in the punch. In addition, the punch may not have a through hole as shown in FIG. 3(B), or may have a structure with a through hole as shown in FIG. 3(A) or FIG. 4.

[0043] REFERENCE SIGNS LIST 1 Press processing device 2 Movable side portion (upper die) 3 Fixed side portion 10, 50 Punch 11, 51 Holding member 12, 52 Through hole 20 Vibrator 22 Upper die holder 23 Support 25 Stripper 26 Spring 27 Guide pin 30 Lower die 31, 33 Hole 32 Lower die holder 60 Punch 61 Holding portion 62A, 62B Through hole 63 Stripper 64 Punch retainer 65 Backing plate 66 Base plate 67 Subplate 68 Brim retainer 70 Vibrator 71 Cooling valve 72 Wiring connector 73 Cover 74 Wiring 80 to 83, 83A Lid

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, wherein the vibrator is housed in a sub-plate layered on top of the backing plate via a base plate, and a first cooling path for passing a refrigerant is provided in the top of the sub-plate so as to straddle the vibrator and pass through both side surfaces of the vibrator.

2. The press working device according to claim 1, wherein the upper part of the first cooling passage is covered with a lid.

3. A press working device according to claim 1 or 2, wherein a second cooling passage for passing a coolant is provided below the sub-plate so as to straddle the vibrator and pass along both sides of the vibrator.

4. A press working device according to claim 1 or 2, wherein a third cooling passage for passing a coolant through the lower part of the base plate is provided so as to straddle the punch and pass through both side surfaces of the punch.

5. A press working device according to claim 1 or 2, wherein a fourth cooling passage for passing a coolant through the upper part of the punch retainer is provided so as to straddle the punch and pass through both side surfaces of the punch.

6. The press working device according to claim 5, wherein an upper through-hole is provided in the upper body of the punch and a lower through-hole is provided in the lower body of the punch, straddling the holding portion from top to bottom.

7. The press working device according to claim 6, wherein the passage of the fourth cooling path includes the lower through hole.

8. 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 a first cooling path for passing a coolant is provided on the top of the sub-plate, and the first cooling path has one first inlet, and passages branch out from the first inlet to each of the vibrators, and each of the branched passages is provided to straddle each of the vibrators and pass both side surfaces of each of the vibrators.

9. A multi-line press working device according to claim 8, wherein the top of the first cooling passage is covered with a lid.

10. A multi-line press processing device as described in claim 8 or 9, wherein a second cooling passage for passing a coolant is provided at the bottom of the sub-plate, the second cooling passage has one second inlet, passages branch out from the second inlet to each of the vibrators, and each of the branched passages is arranged to straddle each of the vibrators and pass along both sides of each of the vibrators.

11. A multi-line press processing device as described in claim 8 or 9, wherein a third cooling passage for passing a coolant is provided at the bottom of the base plate, the third cooling passage has one third inlet, passages branch off from the third inlet to each of the punches, and each of the branched passages is arranged to straddle each of the punches and pass along both sides of each of the punches.

12. A multi-line press working device as described in claim 8 or 9, wherein a fourth cooling passage for passing a refrigerant is provided above the punch retainer, the fourth cooling passage has one fourth inlet, passages branch off from the fourth inlet to each of the punches, and each of the branched passages is arranged to straddle each of the punches and pass along both side surfaces of each of the punches.

13. A multi-line press working device as described in claim 12, wherein an upper through-hole is provided in the upper body of each of the punches, and a lower through-hole is provided in the lower body of each of the punches, spanning the holding portion of each of the punches from top to bottom.

14. A multi-line press working device according to claim 13, wherein each passage of said fourth cooling passage includes said lower through-hole.

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