JP2023055310A - Punch positioning jig and transfer press machine - Google Patents

Abstract

To provide a technique which allows positional adjustment to be performed of a punch at higher accuracy than in prior art.SOLUTION: A punch positioning jig 30 includes a special spacer 31 and a plate type spacer 32 sandwiched between a head part 27H of an adjusting bolt 27 and a ram front face protrusion 25. In addition, the special spacer 31 is provided with a nut storage space 31Z for storing a lock nut 28, and therefore, the lock nut 28 can be separated from the head part 27H of the adjusting bolt 27. Further, the lock nut 28 is passed through an operation port 31Y of the special spacer 31 and tightened, whereby the adjusting bolt 27 can be locked to the lock nut 28 without co-rotating.SELECTED DRAWING: Figure 3

Description

The present disclosure relates to transfer presses and punch positioning jigs used in transfer presses.

As a transfer press, a punch holder is provided below the ram front projection projecting forward from the ram, and the punch held by the punch holder is positioned from above by an adjustment bolt that penetrates the ram front projection in the vertical direction. What is known is. In addition, in this type of transfer press, there is one in which a lock nut screwed onto an adjustment bolt is pressed against the ram front projection to lock the adjustment bolt (see, for example, Patent Document 1).

Japanese Patent No. 6840448 (Figs. 2 and 3)

However, in the above-described conventional transfer press, when the lock nut is tightened after the position of the punch is adjusted with the adjustment bolt, the adjustment bolt rotates together with the lock nut, and the adjustment bolt may be displaced from the adjusted position. , it was difficult to adjust the position of the punch with high accuracy. Therefore, the present disclosure provides a technique that enables the position adjustment of the punch to be performed with higher precision than the conventional technique.

In the first aspect of the invention, which has been made to solve the above-mentioned problems, a punch holding portion for holding a punch is arranged below a ram front projection projecting forward from the ram, and the ram front projection is provided with a punch holding portion. A bolt support portion having a screw hole is provided coaxially with the punch, and the punch is positioned from above by an adjustment bolt that is screwed into the screw hole, and the adjustment bolt is screwed onto the adjustment bolt above the bolt support portion. A punch positioning jig used in a transfer press in which a matching lock nut is pressed against the bolt support portion to lock the adjustment bolt, wherein the head portion of the adjustment bolt and the ram front protrusion a plurality of spacers sandwiched between the plurality of spacers for vertically positioning the adjustment bolt with respect to the ram front projection; A punch comprising a special spacer having a nut accommodation space for accommodating a nut, and an operation port formed in the special spacer and opening the nut accommodation space forward or sideways to allow the lock nut to be screwed. It is a positioning jig.

The invention of claim 2 is the punch positioning jig according to claim 1, further comprising a plate-shaped spacer which is included in the plurality of spacers, has a flat plate shape, and is stacked on the special spacer in the vertical direction.

The invention of claim 3 is the punch positioning jig according to claim 2, wherein the plate-shaped spacer is formed with a notch for receiving the adjustment bolt in a direction perpendicular to the axial direction thereof.

According to the fourth aspect of the invention, the special spacer is bridged between a pair of legs facing each other in the lateral direction with the adjustment bolt interposed therebetween, and upper end portions of the pair of legs, and the adjustment bolt and a ceiling wall having a bolt insertion hole extending therethrough, wherein the nut accommodating space is surrounded by the pair of legs and the ceiling wall. The punch positioning jig described.

According to a fifth aspect of the invention, at least a part of the pair of legs in the vertical direction is positioned rearward of the front end portion of the ceiling wall, and the operation port is open forward and to both sides. It is a punch positioning jig described in .

According to the invention of claim 6, the punch positioning jig according to any one of claims 1 to 5, wherein the rear portion of the special spacer is provided with a ram abutting portion that contacts the front surface of the ram. It is a tool.

The invention according to claim 7 is a transfer press having the punch positioning jig according to claims 1 to 6.

According to an eighth aspect of the invention, there is provided a punch side part surrounding the punch, a screw hole vertically penetrating the ram front projection on the same axis of the punch, and a screw hole screwed into the screw hole and vertically penetrating the punch. and an adjusting sleeve for positioning the punch side part from above, wherein the adjusting sleeve has a female threaded portion to be screwed with the adjusting bolt inside and is included in the bolt supporting portion, and is included in the lock. 8. The transfer press according to claim 7, wherein the nut is pressed against the upper surface of the adjusting sleeve.

The punch positioning jig of claim 1 has a plurality of spacers sandwiched between the head portion of the adjustment bolt and the ram front projection. Then, by changing the number of the plurality of spacers or replacing them with other spacers of different thickness, the adjustment bolt can be adjusted to any position in the vertical direction with respect to the ram front projection, and the adjustment bolt allows the punch to be positioned at any position in the vertical direction. Since the plurality of spacers include a special spacer with a nut housing space for housing the lock nut, the lock nut can be separated from the head portion of the adjustment bolt after the position adjustment of the adjustment bolt is completed. can be done. By tightening the lock nut through the operation port of the special spacer, the adjustment bolt can be locked without being rotated together with the lock nut. This makes it possible to adjust the position of the punch with higher precision than in the conventional art.

In the punch positioning jig of claim 2, the plurality of spacers include plate-shaped spacers having a simpler shape than the special spacers. Variations in adjusting the thickness of jigs can be increased.

In the structure of claim 3, since the plate-shaped spacer has the notch, it can be inserted and removed from the adjustment bolt from the side, and the plate-shaped spacer can be easily attached, detached and replaced.

The special spacer may have a structure in which an operation port is provided on the side of a cylindrical body whose upper end or both upper and lower ends are closed by end walls, and bolt insertion holes through which adjustment bolts pass are provided in the end walls. Alternatively, as in the structure of claim 4, the ceiling wall bridged between the upper ends of the pair of legs may be provided with bolt insertion holes.

In the special spacer of the punch positioning jig according to claim 5, since the operation port is open to the front and both sides, the lock nut can be easily screwed.

By overlapping the rear portion of the special spacer with the front surface of the ram as in the punch positioning jig of claim 6, the deformation of the special spacer is regulated and the positioning accuracy of the special spacer with respect to the adjustment bolt is stabilized.

A transfer press according to claim 7 has the punch positioning jig according to claims 1 to 6, thereby improving processing accuracy.

In the transfer press machine of claim 8, when the position of the adjustment sleeve is changed to adjust the position of the punch side part, the adjustment bolt is moved together with the adjustment sleeve. Since it is positioned against the protrusion, it remains in its current position. That is, it is possible to adjust the position of the punch side parts while maintaining the punch at its current position.

1 is a front view of a transfer press according to a first embodiment of the present disclosure; FIG. Enlarged front view of part of the ram Enlarged perspective view of part of the ram Front sectional view of punch positioning jig The front view which expanded a part of ram of the transfer press machine which concerns on 2nd Embodiment. Front cross-sectional view of the first punch and the second punch of the third embodiment Front sectional view with a part of the ram enlarged Perspective view of punch positioning jig

[First embodiment]
A transfer press machine 10 according to a first embodiment of the present disclosure will be described below with reference to FIGS. 1 to 4. FIG. FIG. 1 shows the entire transfer press 10 of this embodiment. Hereinafter, the lateral direction in FIG. 1 is referred to as the "horizontal direction H1" of the transfer press 10, and the direction perpendicular to the plane of FIG. 1 is referred to as the "front-back direction H2". The side of the transfer press 10 shown in FIG. 1 is called the "front side", and the opposite side is called the "rear side". Furthermore, the right side and left side in FIG. 1 are simply referred to as the right side and left side of the transfer press machine 10 and the like.

As shown in FIG. 1, a transfer press machine 10 has a pair of opposing support walls 12 standing from a base board 11 and facing each other in the horizontal direction H1. A plurality of dies 15 are arranged side by side in the horizontal direction H1 on a frame 13 that spans between them. A plurality of forming holes penetrating vertically are formed in most of the plurality of dies 15 except for some of them, and the forming holes are arranged at equal intervals in the horizontal direction H1. Moreover, a known transfer device 16 disclosed in, for example, Japanese Patent Application Laid-Open No. 2016-203212 is provided on the plurality of dies 15 .

A rear wall (not shown) spans between the rear portions of the pair of opposing support walls 12 above the transfer device 16 , and is provided on the front surface of the rear wall and the inner side surfaces of the pair of opposing support walls 12 . A slide guide (not shown) supports the ram 20 so as to reciprocate vertically. A camshaft 17 extends between the pair of opposing support walls 12 near the upper ends thereof, and the ram 20 moves up and down under the power of a motor (not shown) via the camshaft 17 . A transfer device 16 and a stripper 19, which will be described later, also receive power from the motor via a plurality of parts including a camshaft 17 to operate.

A plurality of punches 18 are attached to the lower end of the ram 20 at positions directly above the plurality of dies 15 , forming a plurality of processing stages for processing a workpiece with the dies 15 and punches 18 . Each time the ram 20 ascends and descends, a disk or elliptical plate is punched out of the sheet metal and drawn into a cylindrical shape at the leftmost processing stage to produce a workpiece. Each time the ram 20 ascends and descends, the workpiece is successively transported to the next processing stage on the right by the transfer device 16 and is subjected to press working such as drawing and ironing to gradually approximate the shape of the product. After passing through all the working stages, the workpiece is discharged to the side of the transfer press machine 10 from the working stage on the right end. A cylindrical stripper 19 is slidably fitted to each punch 18 as shown in FIG. It is pressed and separated from the punch 18.例文帳に追加

The shape or wall thickness of the workpiece formed at each processing stage is changed by adjusting the vertical position of the punch 18 relative to the ram 20 . An adjustment bolt 27 is provided above each punch 18 to adjust the position.

Specifically, as shown in FIG. 3, the ram 20 has a punch support member 21 fixed to the lower end of a ram body 20H. The punch support member 21 has a substantially L-shaped cross section and extends in the horizontal direction H1. A front stepped portion 21D is formed in the middle of the vertical direction on the front surface of the vertical side portion of the punch support member 21 having a substantially L-shaped cross section. It is slightly shifted backward from the part.

A plurality of vertical grooves 21M are arranged in a horizontal row at equal intervals in a portion of the punch support member 21 below the front stepped portion 21D. Each vertical groove portion 21M has a rectangular cross-section, and the punch adapter 22 having a vertically long rectangular parallelepiped shape is received therein. In addition, a pair of screw holes (not shown) are vertically arranged on both left and right sides of the front surface of the punch support member 21 with each vertical groove portion 21M interposed therebetween. One end and the other end of the fixing bar 23 are screwed into the upper left screw hole and the lower right screw hole of each vertical groove portion 21M, and each punch adapter 22 is fixed in each vertical groove portion 21M. there is The punch adapter 22 is also formed with a through hole 22A penetrating vertically and a chip receiving hole 22B communicating from the front surface to the inner surface of the through hole 22A. A punch holding portion 24 is constituted mainly by the vertical groove portion 21M, the punch adapter 22, the fixing bar 23, and the like.

The punch 18 is formed with an upper end flange 18F projecting sideways from the upper end and an engagement groove 18K extending vertically at a position near the upper end of the side surface. Then, the punch 18 is inserted from above into the through hole 22A of the punch adapter 22, the upper end flange 18F abuts the upper surface of the punch adapter 22, and the engaging tip 22T received in the tip receiving hole 22B in the engaging groove 18K. is engaged. As a result, the punch 18 is prevented from rotating by the punch holding portion 24 and held slidably within a certain range in the vertical direction.

A portion of the punch support member 21 above the front stepped portion 21</b>D serves as a ram front projection 25 . As shown in FIG. 2, the ram front protrusion 25 protrudes from the front surface of the entire ram 20 and extends in the horizontal direction H1 to cover the plurality of punch holders 24 from above. As shown in FIG. 3, the upper surface of the ram front protrusion 25 is horizontal and perpendicular to the front surface of the ram body 20H.

As shown in FIG. 3, the portion of the ram front protrusion 25 directly above the plurality of punch holding portions 24 is provided with a plurality of bolts having a plurality of screw holes 26A that vertically penetrate the punches 18 on the same axis. A support portion 26 is provided. An adjustment bolt 27 is screwed into each screw hole 26A and abutted against the punch 18 from above. As a result, the punch 18 abuts against the adjustment bolt 27 and is positioned from above when processing a workpiece. Each bolt support portion 26 is formed with a front screw hole 26B communicating with the screw hole 26A from the front. , the adjustment bolt 27 is prevented from rotating.

By the way, in a plurality of processing stages, the closer the processing stage is to the end, the closer the workpiece is to the shape of the product, so the required processing accuracy is often higher. High machining accuracy is required for machining by the second machining stage. Specifically, the product molded by the transfer press machine 10 of the present embodiment has a structure in which a portion of the bottom of the cylindrical body is provided with a thin portion, and the thin portion has a predetermined specified thickness and height. Accurate matching is required. In order to form the thin portion, the lower surface of the punch 18 of the second processing stage from the right has a shape in which a lower surface protrusion 18T protrudes stepwise from a flat surface, as shown in FIG. On the other hand, the die 15 corresponding to the punch 18 does not have a forming hole, and the lower surface of the bottom wall of the work is pressed against the upper surface. A portion of the bottom portion of the workpiece is sandwiched between the lower projection 18T of the punch 18 and the upper surface of the die 15 to form the aforementioned thin portion. Therefore, the processing accuracy of the thin portion is affected by the positioning accuracy of the punch 18 in the vertical direction. Therefore, in the transfer press machine 10 of this embodiment, as shown in FIG. 2, a punch positioning jig 30 is provided above the processing stage.

As shown in FIG. 4, the punch positioning jig 30 is composed of a plurality of spacers, including a housing-shaped special spacer 31 and a plate-shaped spacer 32 . The special spacer 31 has, for example, a rectangular parallelepiped shape with an open front surface and a lower surface, has a nut accommodating space 31Z inside, and has an operation port 31Y at the front opening. The ceiling wall 31C, rear wall 31A, and side walls 31B of the special spacer 31 are made of metal plates and welded together. Furthermore, the ceiling wall 31C is provided with a bolt insertion hole 31D vertically penetrating the central portion thereof. The pair of side walls 31B of the special spacer 31 correspond to "a pair of legs" in the scope of claims, and the rear surface of the rear wall 31A corresponds to the "ram contact part" in the scope of claims. .

The plate-shaped spacer 32 is, for example, a rectangular metal plate, and a notch 32A extends from the center of one side of the plate-shaped spacer 32 to the center of the entire plate-shaped spacer 32 with a constant width. Further, the inner portion of the notch portion 32A is semicircular.

A plurality of types of plate-shaped spacers 32 having different thicknesses are provided. Specifically, the plate-shaped spacer 32 has a thickness of 1.100 [mm] to 1.900 [mm], which is increased in steps of 0.100 [mm] based on the thickness of 1.000 [mm]. ] and a thickness of 1.010 [mm] to 1.090 [mm] which is increased in steps of 0.010 [mm] based on the thickness of 1.000 [mm] ] and a thickness of 1.001 [mm] to 1.009 [mm] which is increased in steps of 0.001 [mm] based on the thickness of 1.000 [mm] ] and 20 or more fourth plate-shaped spacers 32 having a thickness of 1.000 [mm]. As a result, by matching an arbitrary plate-shaped spacer 32 to the special spacer 31, the height (thickness) of the punch positioning jig 30 can be changed from 0 to 20 [mm] or more in increments of 0.001 [mm]. can be adjusted.

Although the special spacer 31 and the plate-shaped spacer 32 of this embodiment are made of metal, they are not limited to being made of metal as long as they are made of a material that is difficult to compressively deform in the vertical direction. may be manufactured. Further, the plate-shaped spacer 32 of the present embodiment is formed with a cutout portion 32A that is open on one side thereof, but a through hole that penetrates the plate-shaped spacer 32 may be provided instead of the cutout portion 32A. . Furthermore, the plurality of spacers may include plate-shaped spacers that do not have cutouts 32A, through holes, etc., and are laid under the special spacers 31 .

As shown in FIG. 4, the adjustment bolt 27 right above the second processing stage from the right has a head portion 27H projecting sideways from the upper end portion and has a hexagonal tool hole 27K in the center of the upper surface. The punch positioning jig 30 is attached in the following manner and sandwiched between the head portion 27H of the adjustment bolt 27 and the ram front protrusion 25. As shown in FIG.

That is, the adjust bolt 27 is passed through the bolt insertion hole 31D of the special spacer 31 from above and screwed into the lock nut 28 in a state of being removed from the screw hole 26A. Also, the lock nut 28 is moved to a position closer to the upper end of the adjust bolt 27 . Next, the adjustment bolt 27 is screwed into the screw hole 26A of the bolt support portion 26, and the special spacer 31 is placed on the upper surface of the ram front protrusion 25 and its rear surface is placed on the front surface of the ram main body 20H, as shown in FIG. is addressed to In this state, at least one plate-shaped spacer 32 is superimposed on the special spacer 31, and the adjustment bolt 27 is received in the notch 32A. Then, the adjustment bolt 27 is screwed into the screw hole 26A, and the punch positioning jig 30 is sandwiched between the head portion 27H and the ram front projection 25. As shown in FIG.

As a result, the adjustment bolt 27 is positioned with respect to the ram front projection 25, and the punch 18 is also positioned by contacting the adjustment bolt 27 during press working. Then, the lock nut 28 is screwed through the operation port 31Y of the special spacer 31 and pressed against the upper surface of the bolt support portion 26 (that is, the upper surface of the ram front protrusion 25). As a result, the adjustment bolt 27 is locked to the ram front protrusion 25 so as not to rotate. Thus, the mounting of the punch positioning jig 30 is completed.

When the transfer press machine 10 is operated to form a workpiece and the measured value of the thickness of the thin portion of the workpiece deviates from the design value beyond the allowable range, the lock nut 28 is loosened and then By loosening the adjusting bolt 27 and replacing the plate-shaped spacer 32, the height of the entire punch positioning jig 30 can be adjusted so that the thin portion of the work falls within the allowable range. When the thickness of the thin portion can be obtained by slightly thinning the punch positioning jig 30, one plate-shaped spacer 32 is extracted, the thickness is measured, and the plate-shaped spacer 32 is removed by a predetermined amount. Adjustments can also be made by simply grinding and reinserting.

As described above, the punch positioning jig 30 provided in the transfer press machine 10 of this embodiment includes the special spacer 31 and the plate-shaped spacer 32 sandwiched between the head portion 27H of the adjustment bolt 27 and the ram front projection 25. have. Then, by changing the number of plate-shaped spacers 32 or replacing them with plate-shaped spacers 32 of different thicknesses, the adjusting bolts 27 can be adjusted to any position in the vertical direction with respect to the ram front protrusion 25. , the adjusting bolt 27 can position the punch 18 at any position in the vertical direction. Further, since the special spacer 31 is provided with a nut accommodation space 31Z for accommodating the lock nut 28, the lock nut 28 can be separated from the head portion 27H of the adjust bolt 27 after the position adjustment of the adjust bolt 27 is completed. be able to. By tightening the lock nut 28 through the operation port 31</b>Y of the special spacer 31 , the adjustment bolt 27 can be locked without being rotated together with the lock nut 28 . As a result, it becomes possible to adjust the position of the punch 18 with higher precision than in the conventional art. Further, the transfer press machine 10 of the present embodiment has the punch positioning jig 30, thereby improving the processing accuracy.

Further, since the plate-shaped spacers 32 included in the punch positioning jig 30 of this embodiment have a simple structure, the thickness of the punch positioning jig 30 can be reduced by increasing the number of plate-shaped spacers 32 having different thicknesses. Variation of adjustment can be increased. Furthermore, since the plate-shaped spacer 32 has a cutout portion 32A, it can be inserted and pulled out from the adjustment bolt 27 from the side, and the plate-shaped spacer 32 can be easily attached, detached, and replaced. Further, since the rear portion of the special spacer 31 is attached to the front surface of the ram 20, the deformation of the special spacer 31 is restricted, and the positioning accuracy of the special spacer 31 with respect to the adjust bolt 27 is stabilized.

Instead of using the special spacer 31, only the plate-shaped spacer 32 is used as the punch positioning jig 30, and the set screw is inserted into the front screw hole 26B (see FIG. 3) of the bolt support portion 26 instead of the lock nut 28. The adjust bolt 27 may be fixed by screwing. However, locking the adjusting bolt 27 with the lock nut 28 as in the present embodiment can lock the adjusting bolt 27 more firmly than locking the adjusting bolt 27 with a set screw screwed into the front screw hole 26B. In addition, there is no possibility that the thread of the adjusting bolt 27 may be crushed by the set screw.

[Second embodiment]
This embodiment is shown in FIG. 5, showing a state in which a punch positioning jig 30V different from that of the first embodiment is attached to the same transfer press 10 as that of the first embodiment. This punch positioning jig 30V differs from the first embodiment in the structure of the special spacer 33. As shown in FIG.

Specifically, the special spacer 33 of this embodiment has a horizontally long cuboid shape with an open front surface and a lower surface, and covers two adjacent bolt support portions 26 from above. A pair of bolt insertion holes (not shown) are formed in the ceiling wall 33C of the special spacer 33, and the ceiling wall 33C is provided at the center of the special spacer 33 in the horizontal direction H1 in contact with the upper surface of the ram front projection 25. is provided with a reinforcing wall 33E that supports from below. Adjustment bolts 27 are passed through the pair of bolt insertion holes, respectively, and a plate-shaped spacer 32 is sandwiched between the head portion 27H of each adjustment bolt 27 and the upper surface of the special spacer 33 . A pair of lock nuts 28 screwed onto the pair of adjustment bolts 27 are accommodated in the nut accommodation space 33Z in the special spacer 33. As shown in FIG. The configuration of this embodiment also provides the same effects as those of the first embodiment.

[Third embodiment]
A transfer press machine 10W of this embodiment is shown in FIGS. 6 to 8, and punches on a bolt support portion 26W having a structure different from that of the bolt support portion 26 described in the first and second embodiments. A positioning jig 30W is attached. In the bolt support portion 26W, the adjustment sleeve 41 is screwed into a screw hole 40 vertically penetrating the ram front protrusion 25, and the adjustment bolt 27 is screwed into a female screw portion 41N provided inside the adjustment sleeve 41. ing. In other words, the bolt support portion 26W is formed of a portion of the ram front protrusion 25 having the screw hole 40 and the adjustment sleeve 41. As shown in FIG.

As shown in FIG. 8, the upper end of the adjust sleeve 41 is provided with, for example, a hexagonal flange-shaped operating portion 41H. A head portion 27H of the adjusting bolt 27 is also formed in a hexagonal flange shape. The adjustment sleeve 41 is locked by a set screw (not shown) that is screwed into the front screw hole 26B that communicates with the screw hole 40 from the front. may be locked together.

As shown in FIG. 6, in the punch holding portion 24W below the bolt supporting portion 26W, the punch adapter 43 in the vertical groove portion 21M is supported so as to be vertically movable within a certain range. It is biased upward by a spring 44 . Further, as shown in FIG. 7, a cylindrical second punch 48 (corresponding to a "punch side part" in the claims) is fixed to the lower end of the punch adapter 43, and passes through the punch adapter 43. The lower end of the first punch 46 protrudes downward from the lower end of the second punch 48 . The first punch 46 is composed of first punch structures 46A and 46B, and includes a flange portion 46F provided at the lower end of the first punch structure 46B and a flange portion provided at the upper end of the first punch structure 46A. 46F is accommodated in the second punch 48, and the first punch 46 is attached upward by a coil spring 47 sandwiched between the flange portion 46F of the first punch structure 46A and the lower end surface in the second punch 48. are being forced.

As shown in FIG. 6, the adjusting sleeve 41 is abutted against the punch adapter 43 from above, thereby positioning the second punch 48 in the vertical direction, and the adjusting bolt 27 abuts against the first punch 46 from above. Together, the first punch 46 is positioned vertically. In the transfer press machine 10W of the present embodiment, the second punch 48 forms a large-diameter cylindrical portion on the work, and the first punch 46 forms a small-diameter cylindrical portion on the work. In this embodiment, the adjustment bolt 27 is directly abutted against the first punch 46, but for example, another member may be sandwiched between the adjustment bolt 27 and the first punch 46. .

As shown in FIG. 8, the punch positioning jig 30W of this embodiment differs from the punch positioning jigs 30, 30V of the first and second embodiments in the structure of the special spacer 35. As shown in FIG. The special spacer 35 has upper ends of a pair of side walls 35B connected to both side edges of the ceiling wall 35C, and a front wall 35E between the front edge of the ceiling wall 35C and the top of the front edges of the pair of side walls 35B. are connected to each other. A pair of side walls 35B is formed with a notch 35F extending from the front end of the middle portion in the vertical direction to the middle position in the front-rear direction H2. It has an open shape on the front surface of 35 and on both sides.

Further, as in the punch positioning jig 30 of the first embodiment, as shown in FIG. 6, a bolt insertion hole 35D is formed in the ceiling wall 35C of the special spacer 35, and the plate-shaped spacer 32 is formed on the ceiling wall 35C. is superimposed. A special spacer 35 and a plate-shaped spacer 32 are sandwiched between the head portion 27H of the adjusting bolt 27 and the upper surface of the ram front projection 25, and the rear surface of the special spacer 35 is applied to the front surface of the ram 20. A lock nut 28 screwed onto the adjusting bolt 27 is pressed against the upper surface of the adjusting sleeve 41 to lock the adjusting bolt 27 .

In the transfer press machine 10W of this embodiment, when the position of the adjusting sleeve 41 is changed to adjust the position of the second punch 48, the adjusting bolt 27 is moved together with the adjusting sleeve 41. The adjusting bolt 27 is used for punch positioning. Since it is positioned with respect to the ram front protrusion 25 by the jig 30W, it is maintained at the current position. That is, it is possible to adjust the position of the second punch 48 while maintaining the first punch 46 at its current position. Further, since the height of the punch positioning jig 30W can be changed while the adjusting sleeve 41 is fixed, the position of the first punch 46 can be adjusted while maintaining the second punch 48 at its current position. . Furthermore, since the operation port 35Y of the special spacer 35 of this embodiment is open to the front and both sides, the lock nut 28 can be easily screwed.

Examples of processing by the second punch 48 of the present embodiment include the following examples. That is, in a work having a stepped shape whose diameter is expanded at an intermediate position in the axial direction, processing for adjusting the position of a stepped wall whose diameter is expanded in a stepped shape with respect to the bottom wall of the work can be mentioned. Further, there is an example of using it as a metal core for determining the depth of a work when notches or holes are formed in the side surface of the work.

[Other embodiments]
The present invention is not limited to the above embodiments. For example, embodiments described below are also included in the technical scope of the present invention. It can be changed and implemented.

The special spacer 31 of the above-described embodiment has a box-shaped structure, but it may have a table structure in which the legs hang down from the four corners of the top plate, or the upper end or both upper and lower ends may be formed by end walls. A structure may be employed in which an operation port is provided on the side of the closed cylindrical body, and a bolt insertion hole through which an adjustment bolt penetrates is provided in the end wall.

Although specific examples of the technology included in the claims are disclosed in the specification and drawings, the technology described in the claims is not limited to these specific examples. Various modifications and changes of the examples are included, and a part of specific examples is also included.

10, 10W Transfer press machine 18 Punch 20 Ram 21 Punch support member 24, 24W Punch holding part 25 Ram front protrusion 26, 26W Bolt support part 26A Screw hole 27 Adjust bolt 27H Head part 28 Lock nut 30, 30V, 30W Punch positioning Jigs 31, 33, 35 Special spacers 31B, 35B Side walls (legs)
31C, 35C ceiling wall 31D, 35D bolt insertion hole 31Y, 35Y operating port 31Z, 35Z nut accommodation space 32 plate-shaped spacer 32A notch 35F notch 40 screw hole 41 adjusting sleeve 46 first punch 48 second punch (side of punch) parts)

Claims (8)

A punch holding part for holding a punch is arranged below a ram front protrusion projecting forward from the ram, and a bolt support part having a screw hole is provided on the ram front protrusion coaxially with the punch. be
The punch is positioned from above by an adjustment bolt screwed into the screw hole, and a lock nut screwed onto the adjustment bolt above the bolt support portion is pressed against the bolt support portion to lock the adjustment bolt. A punch positioning jig used in a transfer press machine,
a plurality of spacers sandwiched between the head portion of the adjustment bolt and the ram front projection to vertically position the adjustment bolt with respect to the ram front projection;
a special spacer that is included in the plurality of spacers and has a nut accommodation space through which the adjustment bolt passes vertically and that accommodates the lock nut;
A punch positioning jig comprising an operation opening formed in the special spacer and opening the nut accommodating space forward or sideways so that the lock nut can be screwed. 2. A punch positioning jig according to claim 1, further comprising a plate-shaped spacer included in said plurality of spacers, having a flat plate shape, and vertically stacked on said special spacer. 3. A punch positioning jig according to claim 2, wherein said plate-shaped spacer is formed with a notch for receiving said adjustment bolt in a direction orthogonal to its axial direction. The special spacer has a pair of legs that face each other in the lateral direction with the adjustment bolt interposed therebetween, and a bolt insertion hole bridged between upper ends of the pair of legs and through which the adjustment bolt passes. a ceiling wall;
4. The punch positioning jig according to any one of claims 1 to 3, wherein the nut accommodating space is surrounded by the pair of legs and the ceiling wall. 5. A punch positioning jig according to claim 4, wherein at least a part of said pair of legs in the vertical direction is positioned rearward of the front end of said ceiling wall, and said operation port is open to the front and both sides. . 6. The punch positioning jig according to any one of claims 1 to 5, wherein a rear portion of said special spacer is provided with a ram abutting portion that contacts a front surface of said ram. A transfer press having the punch positioning jig according to any one of claims 1 to 6. a punch side piece surrounding the punch;
a screw hole vertically penetrating the ram front protrusion on the same axis of the punch;
an adjusting sleeve that is screwed into the screw hole and penetrates vertically to position the punch side part from above;
the adjustment sleeve has a female threaded portion that is screwed with the adjustment bolt inside and is included in the bolt support portion;
8. A transfer press according to claim 7, wherein said lock nut is pressed against the upper surface of said adjusting sleeve.

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