CN101495252B

CN101495252B - Punch assembly

Info

Publication number: CN101495252B
Application number: CN2007800281785A
Authority: CN
Inventors: 杉崎文隆; 岩本正己
Original assignee: Amada Co Ltd
Current assignee: Amada Co Ltd
Priority date: 2006-07-25
Filing date: 2007-07-23
Publication date: 2011-05-25
Anticipated expiration: 2027-07-23
Also published as: KR20090023738A; JP2008023581A; TW200822986A; CN101495252A; KR101120630B1; JP4902286B2; TWI337902B; WO2008013289A1

Abstract

A punch assembly has a punch head screwable to a punch body, and the punch head has a slit and a first tapered section. The punch assembly further has a ring member having a second tapered section fittable to the first tapered section of the punch head. A pressing member capable of pressing the ring member is provided at the punch head, and a third tapered section is provided at the upper face of the ring member.

Description

Punch assembly

Technical field

The present invention relates to possess the punch assembly of drift head locking gear.

Background technology

The punch assembly that had in the past possessed drift head locking gear is for example opened in the 2003-136157 communique open the spy.

This drift head locking gear have with the bottom be provided with the drift point of a knife drift driver (punch body) the upper end screw thread in conjunction with and be formed with the drift head of joint-cutting and be formed with ring component with the chimeric corresponding tapered portion of the tapered portion of drift head.

According to this structure, if above-mentioned ring component is urged upward by the discharging spring, then the drift head is pressed on the punch body side because of the effect of two tapered portion.

At this moment, as narrating, owing to be formed with joint-cutting, make this drift head very easily be out of shape on the drift head, therefore, the upper end of this drift head is pressed on the upper end of above-mentioned perforating press main body side securely.

Promptly, the drift head is pressed on the perforating press main body securely, thus, the drift head in the processing can not relax with respect to punch body, improves the anti-loosing effect of this drift head.

Yet as mentioned above, existing drift head locking gear is formed with joint-cutting on the drift head.

And, under the narrower state in the interval of this joint-cutting, be formed with its drift head clamping punch body strong.

Therefore, even if remove ring component chimeric for above-mentioned drift head, original state is not recovered with the elastic force of drift head self in the interval of joint-cutting yet.

So, only with remove ring component chimeric be to make drift head and punch body counterrotating.

Its result, the drift head is relative with punch body to be rotated in order to make, except the chimeric chimeric releasing of removing ring component with the bolt, also need to be used to force to expand mechanism's (for example, above-mentioned spy opens the disclosed joint-cutting expanding part of 2003-136157 communique) of joint-cutting.

In other words, the past, the drift head is relative with punch body to be rotated in order to make, need except above-mentioned chimeric releasing with the unnecessary parts the bolt, structure correspondingly complicates thus.In addition, cause cost also high.

Have again, in existing drift head locking gear, the middle part that is formed at the joint-cutting 13 (above-mentioned spy opens Fig. 2 of 2003-136157 communique) on the drift head is provided with connecting hole 19, and above-mentioned joint-cutting expanding part 21 is fastened in this connecting hole 19, and this joint-cutting expanding part 21 is attached on the ring component 15.

According to this structure, add man-hour boring a hole, if with the above-mentioned drift head of pressure head punching press, then based on from the load concentration of the stamping press of pressure head snap portions at the above-mentioned connecting hole and the joint-cutting expanding part of drift head.

There is the situation of drift head or ring component breakage in its result, just can not use with back punching head head locking gear.

Promptly, the past adds the situation that drift head or ring component breakage are arranged man-hour boring a hole, therefore, the life-span of the drift head locking gear that is made of drift head and ring component is shorter.

Summary of the invention

The purpose of this invention is to provide a kind of relate to having possessed by ring component is entrenched in make the drift head be pressed on the punch assembly of the drift head locking gear on the punch body securely on the drift head, by preventing drift head or ring component breakage man-hour boring a hole to add, thereby the life-span of the drift head locking gear that lengthening is made of this drift head and ring component, and when the drift head rotates not need except chimeric releasing with the unnecessary parts the bolt, by forcing to open the counterrotating punch assembly that drift head integral body can realize drift head and punch body.

In order to solve above-mentioned problem; such as in the first claimed scheme record; the present invention has adopted this technological means of following punch assembly P; promptly; has the drift head 32 that can combine with punch body 31 screw threads; on this drift head 32, be provided with joint-cutting 39 up to the 32A of tube portion from flange part 32B; and on the lateral surface of the 32A of this, be provided with first tapered portion 40; have again; have medial surface be provided with can with the ring component 2 of chimeric second tapered portion 41 of first tapered portion 40 of this drift head 32; and the push part 1 that can push this ring component 2 is arranged on the drift head 32, it is characterized in that being provided with on above-mentioned ring component 2 third hand tap shape portion 3.

Structure according to the invention described above, (spy opened Fig. 1 of 2003-136157 communique as the past owing to no longer needing, Fig. 2) the joint-cutting expanding part that links with ring component is fastened in the connecting hole at middle part of the joint-cutting that is arranged at the drift head, so add man-hour boring a hole, even if utilize pressure head punching press drift head, be not concentrated in the snap portions of above-mentioned joint-cutting expanding part and connecting hole based on the load of stamping press yet, thereby prevent drift head or ring component breakage, therefore, the life-span of the drift head locking gear that constitutes by this drift head and ring component of lengthening.

In addition, according to structure of the present invention, by on ring component 2 (Fig. 3 (B)), third hand tap shape portion 3 being set, if push above-mentioned third hand tap shape portion 3 with bolt 1 with for example chimeric releasing of push part 1 that is arranged on the drift head 32, then this ring component 2 overcomes the active force of discharging spring 33 and is pressed down, thereby drift head 32 is freed the constraint of ring component 2, and owing to act on the component T (Fig. 5) parallel among the power G vertically downward on the above-mentioned bolt 1 with third hand tap shape portion 3, make this bolt 1 in third hand tap shape portion 3, slide laterally, therefore, this component T is applied to drift head 32 (Fig. 2) on the whole, thereby drift head 32 is forced to open, thereby this drift head 32 can rotate relatively with punch body 31.

As mentioned above, according to structure of the present invention, punch assembly with following effect is provided, promptly, this punch assembly relates to having possessed by ring component is entrenched in makes the drift head be pressed on the punch assembly of the drift head locking gear on the punch body securely on the drift head, by preventing drift head or ring component breakage man-hour boring a hole to add, thereby the life-span of the drift head locking gear that lengthening is made of this drift head and ring component, and when the drift head rotates not need except chimeric releasing with the unnecessary parts the bolt, by forcing to open the relative rotation that drift head integral body can realize drift head and punch body.

Description of drawings

Fig. 1 is an overall diagram of the present invention.

Fig. 2 relates to the detail drawing of punch assembly P of the present invention.

Fig. 3 is action specification figure of the present invention.

Fig. 4 is the figure of relation of second tapered portion 41 of first tapered portion 40 of drift head 32 sides in the presentation graphs 3 (A) and ring component 2 sides.

Fig. 5 is the figure of the push part 1 of drift head 32 sides in the presentation graphs 3 (B) power that occasion acted on of sliding in the third hand tap shape portion 3 of ring component 2 sides.

Fig. 6 is drift head 32 figure of the form of open occasion laterally in the presentation graphs 3 (B).

Fig. 7 is the overall diagram of expression other embodiment of the present invention.

Fig. 8 is the detail drawing that relates to punch assembly P of the present invention among Fig. 7.

Fig. 9 is the figure of the drift head 32 in the presentation graphs 7.

Figure 10 is drift head 32 figure of the form of open occasion laterally in the presentation graphs 7.

The specific embodiment

Below by embodiment and with reference to description of drawings the present invention.

Fig. 1 is an overall diagram of the present invention, is that expression relates to the figure that punch assembly P of the present invention is applied in the occasion on the rotary type tower stamping machine.

The rotary type tower stamping machine has top capstan head 6 and bottom capstan head 7, disposes punch assembly P and former D respectively, as everyone knows, top capstan head 6 and bottom capstan head 7 is rotated synchronously, thereby can select desirable punch assembly P and former D in the drift center C.

Above the punch assembly P of drift center C, be provided with pressure head 35,, then cooperate and can bore a hole workpiece W with former D if utilize the drift head 32 of this pressure head 35 punching press punch assembly P.

Above-mentioned punch assembly P has the drift guide 30 of tubular, and this drift guide 30 is supported on top capstan head 6 by means of lifting spring 34, and above-below direction is led.

The lower end of butt discharging spring 33 on the top back-up ring 20 on the flange that is disposed at above-mentioned drift guide 30, the upper end of this discharging spring 33 be connected to ring component 2 described later below, as shown in the figure, discharging spring 33 is covered by cover 24.

Insert bottom back-up ring 21 and install with bolt 22 in above-mentioned top back-up ring 20, this bottom back-up ring 21 is connected to the flange inner face of drift guide 30 by means of O shape ring 37.

The punch body 31 of extending along the vertical direction connects the inside of drift guide 30, bottom back-up ring 21, top back-up ring 20 and discharging spring 33, and drift head 32 combines with the upper end screw thread of this punch body 31.

Be formed with drift point of a knife 38 in the bottom of above-mentioned punch body 31, this punch body 31 end thereon has for example external thread part 8, and screw thread is in conjunction with the internal thread part 9 of the correspondence of drift head 32 sides on this external thread part 8.

This drift head 32 has the 32A of tube portion that is formed with above-mentioned internal thread part 9 at medial surface, and the 32A of this extends to above-mentioned top back-up ring 20, is limited the displacement of the above-below direction of this drift head 32 by the retainer 23 of these top back-up ring 20 sides.

The outward appearance of drift head 32 has the 32A of tube portion and for example columned flange part 32B that have narrated as shown in Figure 2, and has the set joint-cutting 39 of scope at this flange part 32B and the 32A of tube portion.

In this occasion, joint-cutting 39 extends upward from being formed at the rounded portions 39A of the 32A of portion, and passes to internal thread part 9 sides and the outside of flange part 32B, about internal thread part 9, also is provided with identical joint-cutting 39 at opposition side.

Promptly, in the occasion of Fig. 2, at the set joint-cutting 39 of scope of flange part 32B and the 32A of tube portion, about the internal thread part 9 of drift head 32, in other words, about with the screw thread joint portion of punch body 31, be arranged on an opposite side each other, and the shape of each joint-cutting 39 is identical.

According to this structure, by third hand tap shape portion 3 with push part 1 pushing ring component 2 described later, and at the occasion of opening drift head 32 (Fig. 6), force to open so as the left part 32a of this drift head 32 and right side part 32b with the some α on the rounded portions 39A of above-mentioned joint-cutting 39 be the center to the left and right direction deviate from.

Have again, the lateral surface of the above-mentioned tube 32A of portion that constitutes drift head 32 be flange part 32B near be provided with first tapered portion 40, on flange part 32B, be provided with for example chimeric releasing bolt of push part 1 that pushes the third hand tap shape described later portion 3 that is arranged at above the ring component 2.

On the other hand, as narrating, the upper end of butt discharging spring 33 below ring component 2 (Fig. 1), the lower end of discharging spring 33 is connected on the top back-up ring 20, be provided with on the medial surface of this ring component 2 (Fig. 2) with the 32A of tube portion that is arranged on above-mentioned drift head 32 on the second corresponding tapered portion 41 of first tapered portion 40.

According to said structure, if ring component 2 rises because of the active force of discharging spring 33 (Fig. 3 (A)), then second tapered portion 41 of this ring component 2 is chimeric with first tapered portion 40 of drift head 32 sides, at this moment, owing on drift head 32, be formed with joint-cutting 39, make these drift head 32 easy deformation and be pressed on punch body 31 sides securely, thereby prevent that drift head 32 is lax.

In this occasion, the chimerism of second tapered portion 41 of ring component 2 sides and first tapered portion 40 of drift head 32 sides as shown in Figure 4.

Promptly, second tapered portion 41 of ring component 2 sides be arranged on whole medial surface all on, and first tapered portion 40 of drift head 32 sides be not be arranged on the lateral surface of the 32A of portion all on, but be arranged on corresponding position, position with the both sides of joint-cutting 39 across vertical component effect 40 ' (Fig. 4) perpendicular to the above-below direction of the 32A of this (Fig. 1), in other words, be configured in the both sides of joint-cutting 39 and parallel with it.

First tapered portion 40 for above-mentioned drift head 32 sides is described in detail as follows.

If the 32A of tube portion of drift head 32 is made cylinder, when then observing from the top as shown in Figure 4, first tapered portion 40 is circular-arc, and as narrate, be configured in the both sides of joint-cutting 39 and parallel with it, between each first tapered portion 40 of the both sides of this joint-cutting 39 of and the vertical component effect 40 of the continuous linearity of each first tapered portion 40 ' be arranged in the mode of crossing joint-cutting 39.

According to this structure, as narrating, rise as if the active force of ring component 2 because of discharging spring 33 (Fig. 3 (A)), then second tapered portion 41 of this ring component 2 is chimeric with first tapered portion 40 of above-mentioned joint-cutting 39 both sides of drift head 32 sides.

At this moment, as narrating, first tapered portion 40 of drift head 32 sides is configured in the both sides of joint-cutting 39 and parallel with it, therefore, from ring component 2 sides with joint-cutting 39 roughly the thrust of quadrature concentrate on each first tapered portion 40 of drift head 32, make these drift head 32 easy deformation and be pressed on punch body 31 sides securely, thereby prevent that drift head 32 is lax.

In addition, on ring component 2 (Fig. 3 (B)), be provided with the low third hand tap shape portion 3 in the inboard high outside that forms, for example on the flange part 32B, as narrating, being provided with chimeric releasing is bolt 1 with bolt 1 in position relative with this third hand tap shape portion 3 on the drift head 32.

In this occasion, for example, as shown in Figure 2, in the periphery of flange part 32B and the position corresponding, be that the both sides of joint-cutting 39 are provided with a plurality of (for example being 2) screwed hole 1A, dispose bolt 1 so that bolt 1 is screwed into screwed hole 1A in the both sides of joint-cutting 39 with 39 liang of side positions of the joint-cutting of having narrated.

In addition, the peripheral shape of the front end of above-mentioned bolt 1 becomes fillet (Fig. 2, Fig. 5), and thus, in the occasion of the third hand tap shape portion 3 of bolt 1 pushing ring component 2, this bolt 1 can successfully slide laterally in third hand tap shape portion 3 and can not cut third hand tap shape portion 3.

According to this structure, the third hand tap shape portion 3 of pushing ring component 2 if push bolt 1, then ring component 2 overcomes the active force of discharging spring 33 and pushes the below to, thereby drift head 32 is freed from the thrust of ring component 2, meanwhile, drift head 32 is forced to open laterally, thereby this drift head 32 can rotate relatively with punch body 31.

Promptly, push the occasion of the third hand tap shape portion 3 of ring component 2 at bolt 1, shown in Fig. 3 (B), if, then push the below to because of this power G by ring component 2 from for example square vertically downward power G of bolt 1 lateral rings parts 2 side effects, thereby as previously described, drift head 32 is freed from ring component 2.

Therefore, under this state, if the third hand tap shape portion 3 that bolt 1 continues pushing ring component 2, then be arranged on to have freed and in the third hand tap shape portion 3 of this ring component 2, slide laterally, thereby open laterally with drift head 32 that bolt 1 constitutes one by the bolt 1 on the drift head 32 of ring component 2 caused constraints.

For example, as shown in Figure 5, when the angle with above-mentioned third hand tap shape portion 3 was made as φ, the power G that bolt 1 is produced can be decomposed into the parallel component G * sin φ and vertical vertical stress component G * cos φ parallel with third hand tap shape portion 3 as shown in the figure.

And by the above-mentioned parallel component G * sin φ in this component, bolt 1 slides in third hand tap shape portion 3 laterally, and the power T=G that is acted on during this slip * sin φ is with all open laterally mode of drift head 32 is worked (Fig. 2).

In other words, bolt 1 slides in the third hand tap shape portion 3 at this ring component 2 laterally by on one side ring component 2 being pushed on one side towards the below, thereby drift head Final 32 system is opened laterally.

Therefore, even if be formed on the narrow width of the joint-cutting 39 on the drift head 32, owing to apply the power T=G * sin φ of the bolt 1 that slides laterally in the third hand tap shape portion 3 of comfortable ring component 2 on the whole at this drift head 32, thereby drift head 32 opens easily laterally, thus, can realize rotation with respect to punch body 31.

In this occasion, as narrating (Fig. 2), joint-cutting 39 about the internal thread part 9 of drift head 32 promptly, with the screw thread joint portion of punch body 31, be configured in opposition side with being symmetry shape, and, as narrating, be provided with bolt 1 in the both sides of this joint-cutting 39.

Therefore, because the power T=G * sin φ that is acted on when (Fig. 2) slides in the third hand tap shape portion 3 of bolt 1 at ring component 2 makes the open laterally occasion of drift head 32 integral body, as shown in Figure 6, about this joint-cutting 39, with the some α on the rounded portions 39A of joint-cutting 39 is the center, and the left part 32a of drift head 32 and right side part 32b force to open in the mode that direction to the left and right deviates from laterally.

Below, the action of the present invention with said structure is described.

Promptly, after the Working position on the workpiece W (Fig. 1) is positioned at the drift center C, top capstan head 6 and bottom capstan head 7 are rotated synchronously, select desirable plunger chip die P and former assembly D in this drift center C, if with pressure head 35 punching press drift heads 32, then promoting spring 34 compression makes drift guide 30 descend and is pushing with its front end under the state of workpiece W, thereby 33 compressions of discharging spring comprise punch body 31 integral body of drift head 32 and descend with cover 24, utilize the punch die point of a knife 4 of the main body 5 of its drift point of a knife 38 and former assembly D side, workpiece W is carried out for example punching.

During this period, second tapered portion 41 of ring component 2 is utilized the active force of discharging spring 33 (Fig. 3 (A)), chimeric with first tapered portion 40 (Fig. 1) that both sides at the joint-cutting 39 of drift head 32 sides dispose in parallelly, therefore, from ring component 2 sides with joint-cutting 39 roughly the thrust of quadrature concentrate on each first tapered portion 40 of drift head 32 sides, make these drift head 32 easy deformation and be pressed on punch body 31 sides securely, thus, prevent that drift head 32 is lax.

And, according to the present invention, (spy opened Fig. 1 of 2003-136157 communique as the past owing to no longer needing, Fig. 2) the joint-cutting expanding part that links with ring component is fastened in the connecting hole at middle part of the joint-cutting that is arranged at the drift head, so add man-hour boring a hole, even if utilize pressure head 35 (Fig. 1) punching press drift head 32 as mentioned above like that, be not concentrated in the snap portions of above-mentioned joint-cutting expanding part and connecting hole based on the load of stamping press yet, thereby prevent drift head 32 or ring component 2 breakages, therefore, extended life-span of the drift head locking gear that constitutes by this drift head 32 and ring component 2.

In addition, wear and tear because of the processing of repeatedly boring a hole at drift point of a knife 38, and after once more this drift point of a knife 38 being ground, be necessary to carry out for example adjustment of drift height, therefore, when carrying out the relative rotation of drift head 32 and punch body 31, carry out following action.

At first, the top third hand tap shape portion 3 of pushing ring component 2 if push bolt 1 (Fig. 3 (B)), then ring component 2 active force that overcomes discharging spring 33 is pushed down, thus drift head 32 is freed the constraint of ring component 2.

Then, under this state, if bolt 1 continues the above-mentioned third hand tap shape portion 3 of pushing ring component 2, then be arranged on to have freed and in the third hand tap shape portion 3 of this ring component 2, slide laterally, thereby open laterally with drift head 32 that bolt 1 constitutes one by the bolt 1 on the drift head 32 of ring component 2 caused constraints.

Promptly, bolt 1 slides laterally in the third hand tap shape portion 3 at this ring component 2 by on one side ring component 2 being pushed on one side towards the below, thereby drift head Final 32 system is opened laterally.

Therefore, even if be formed on the narrow width of the joint-cutting 39 on the drift head 32, because the power T=G * sin φ of the bolt 1 that in the third hand tap shape portion 3 that applies comfortable ring component 2 on this drift head 32, slides laterally, thereby drift head 32 opens (Fig. 6) easily laterally, thus, can realize rotation with respect to punch body 31.

Like this, according to the present invention, when 32 rotations of drift head, need be except the unnecessary parts bolt 1 is used in chimeric releasing, make in the third hand tap shape portion 3 of bolt 1 on ring component 2 and slide laterally, thus, by forcing to open drift head 32 integral body, can realize the relative rotation of drift head 32 and punch body 31.

Be with the main difference point of Fig. 1, the 32A of tube portion of drift head 32 is shorter, in addition, at the set joint-cutting 39 of the scope of the flange part 32B of drift head 32 and the 32A of tube portion about internal thread part 9, be arranged on an opposite side each other, and the shape difference of each joint-cutting 39 has again, cover 24 locking functions with punch body 31.

Promptly, as shown in Figure 7, drift head 32 similarly has flange part 32B and the 32A of tube portion, and screw thread is combined with punch body 31 on this drift head 32.

And, on the compared to Figure 1 short 32A of tube portion (Fig. 7, Fig. 8),, similarly constitute drift head locking gear by chimeric ring component 2.

Have again, on the flange part 32B of drift head 32, be provided with ladder difference 32C at lateral surface, this ladder difference 32C make with from covering the outstanding to the inside protuberance 24C butt in 24 upper end.

In addition, cover 24 lower end is fixed on by means of setting tool 26 on the back-up ring 25 above the flange that is arranged at drift guide 30.

According to this structure, similarly add man-hour boring a hole, if with pressure head 35 punching press drift heads 32, then promoting spring 34 compression makes drift guide 30 descend and is pushing with its front end under the state of workpiece W, thereby 33 compressions of discharging spring are in cover 24 inside fixing as narrating, comprise punch body 31 whole declines of drift head 32, utilize the punch die point of a knife 4 of the main body 5 of its drift point of a knife 38 and former assembly D side, workpiece W is carried out for example punching.

In addition, after the process finishing, if being risen, pressure head 35 leaves drift head 32, then with above-mentioned opposite, at first be that discharging spring 33 then is to promote spring 34 compressions, thus in the above-mentioned cover of fixing 24 inside, the punch body 31 that comprises drift head 32 rises overally, and the ladder difference 32C of drift head 32 returns upper limit position with the protuberance 24C butt of cover 24.

On the other hand, the summary of drift head 32 as shown in Figure 9, similarly, joint-cutting 39 is in the scope setting of flange part 32B and the 32A of tube portion.

Fig. 9 (A) is a vertical view, and Fig. 9 (B) is rearview (figure that observes from the arrow B of Fig. 9 (A)), and Fig. 9 (C) is front view (figure that observes from the arrow C of Fig. 9 (A)).

Yet, different with the situation of Fig. 1～Fig. 6 that has narrated, the joint-cutting 39 of present embodiment passes to internal thread part 9 sides from the rounded portions 39A ' that is formed on flange part 32B (Fig. 9 (A)), directly also laterally passes (Fig. 9 (C)) by extending behind the 32A of tube portion (Fig. 9 (B)) downwards.

Like this, except the joint-cutting 39 of the side that is arranged at internal thread part 9 (in Fig. 9 (A), being upside), opposite side (being downside in Fig. 9 (A)) at this internal thread part 9 also is provided with joint-cutting 39, the joint-cutting 39 of this opposite side not only passes but also passes to ladder difference 32C side to internal thread part 9 sides, and continuously directly by extending downwards behind the 32A of tube portion and also passing (Fig. 9 (C)) laterally.

Promptly, as narrating, in the present embodiment, at the flange part 32B of drift head 32 and the set joint-cutting 39 (Fig. 9 (A)) of scope of the 32A of tube portion, internal thread part 9 about this drift head 32, in other words, about with the screw thread joint portion of punch body 31, be arranged on an opposite side each other, and the shape difference of each joint-cutting 39.

According to this structure, similarly, making the open laterally occasion of drift head 32 integral body owing to be arranged on the power T=G * sin φ that is acted on when sliding in the third hand tap shape portion 3 of bolt 1 (Fig. 8) at ring component 2 of joint-cutting 39 both sides, as shown in figure 10, being the center about the some β on the rounded portions 39A ' of internal thread part 9 asymmetrical joint-cuttings 39, the left part 32a of drift head 32 forces to open to clockwise direction (arrow A) laterally, and right side part 32b deviates from and forces laterally to counterclockwise (arrow B) and opens.

For the embodiment of above-mentioned Fig. 7～Figure 10, the embodiment of effect, the effect of miscellaneous part and integral body and Fig. 1～Fig. 6 that has narrated is identical, so detailed.

Utilize possibility as follows on the industry.

As mentioned above, the present invention relates to possess by ring component is entrenched in makes the drift head be pressed on securely the punch assembly of the drift head locking gear on the punch body on the drift head, be used in following punch assembly, namely by preventing drift head or ring component breakage man-hour boring a hole to add, thereby lengthen the life-span of the drift head locking gear that is consisted of by this drift head and ring component, and when the drift end rotation not need to except chimeric releasing with the unnecessary parts the bolt, by forcing to open the relative rotation that drift head integral body can realize drift head and punch body, in addition, not only be applied to capstan head formula stamping machine, but also be applied to the one-shot press, on other general press, thus very useful.

Claims

1. punch assembly, has the drift head that can combine with the punch body screw thread, on this drift head, be provided with joint-cutting up to tube portion from flange part, and the lateral surface in this one is provided with first tapered portion, and have medial surface be provided with can with the ring component of chimeric second tapered portion of first tapered portion of this drift head, and the push part that can push this ring component is arranged on the drift head, and this punch assembly is characterised in that

On above-mentioned ring component, be provided with third hand tap shape portion.

2. punch assembly according to claim 1 is characterized in that,

Above-mentioned first tapered portion is configured in the both sides of joint-cutting and parallel with it.

3. punch assembly according to claim 1 is characterized in that,

It is low that above-mentioned third hand tap shape portion forms the inboard high outside.

4. punch assembly according to claim 1 is characterized in that,

Above-mentioned push part is made of with bolt the chimeric chimeric releasing of removing the relative drift head of ring component, and the peripheral shape of the front end of this bolt becomes fillet.