KR101120630B1 - Punch assembly - Google Patents

Abstract

The punch head has a punch head that can be mated with the punch body, and the punch head has a ring member provided with a slit and a first tapered portion, and furthermore, a ring member provided with a first tapered portion of the punch head and a second tapered portion that can be fitted thereon. A pressure member as far as possible is provided in the punch head, and a third taper portion is provided on the upper surface of the ring member.

Description

Punch Assembly {PUNCH ASSEMBLY}

The present invention relates to a punch assembly having a punch head relaxation preventing mechanism.

Conventionally, a punch assembly having a punch head relaxation preventing mechanism is disclosed in, for example, Japanese Patent Laid-Open No. 2003-136157.

The punch head relaxation preventing mechanism is fitted to the upper end of a punch driver (punch body) provided with a punch knife end at the lower end, and has a ring member having a punch head with a slit formed thereon and a corresponding taper part fitted with a tapered portion of the punch head.

With this configuration, when the ring member is pressed upward by the stripper springs, the punch head is tightly tightened to the punch body side by the action of both tape portions.

At this time, since the slits are formed in the punch head as described above, the punch head deforms very easily, so that the upper end of the punch head is firmly tightened with respect to the upper end of the punch body side.

That is, the punch head is firmly tightened to the punch body, and thus, the punch head during the machining has no relaxation with respect to the punch body and the relaxation prevention effect of the punch head is improved.

However, as described above, in the conventional punchhead relaxation prevention mechanism, slits are formed in the punchhead.

In the state where the slit is narrow, the punch head on which it is formed strongly holds the punch body.

Therefore, even if the ring member with respect to the punch is released, the spacing of the slits does not return to the original elastic force of the punch head itself.

Therefore, the punch head and the punch body cannot be relatively rotated only by releasing the fitting of the ring member.

As a result, in order to rotate the punch head and the punch body relatively, a mechanism for forcibly widening the slit other than the release bolt for releasing the engagement of the ring member is required (for example, the Japanese Laid-Open Patent Publication 2003-A). Slit expansion members disclosed in 136157).

In other words, conventionally, in order to rotate the punch head and the punch body relatively, an extra member other than the above-mentioned de-screwing bolt is required, and the configuration thereof is complicated. It also causes cost up.

Furthermore, in the conventional punch head relaxation prevention mechanism, the engagement hole 19 is provided in the middle of the slit 13 (FIG. 2 of the said Unexamined-Japanese-Patent No. 2003-136157) and this engagement hole 19 is provided. The slit extension member 21 is engaged with the slit extension member 21, which is connected to the ring member 15.

With this configuration, when punching the punch head with the ram during punching, the load due to the other pressure from the ram concentrates on the engaging portion of the punching head and the slit expansion member.

As a result, the punch head and the ring member may be damaged, and the punch head relaxation preventing mechanism cannot be used afterwards.

In other words, the punch head or the ring member may be damaged during the punching process. Therefore, the life of the punch head relaxation preventing mechanism constituted by the punch head and the ring member is short.

SUMMARY OF THE INVENTION An object of the present invention relates to a punch assembly having a punch head relaxation preventing mechanism for tightly tightening a punch head to a punch body by fitting a ring member to a punch head, wherein the punch head or ring member is damaged during punching. This prevents the life of the punch head relaxation prevention mechanism constituted by the punch head and the ring member, and forcibly opens the entire punch head without using an extra member other than the release bolt for rotation of the punch head. This provides a punch assembly that allows relative rotation of the punch head and punch body.

[Solution Solution]

In order to solve the said subject, this invention is as described in Claim 1,

It has a punch head 32 which can be combined with the punch body 31. The punch head 32 is provided with a slit 39 from the flange portion 32B to the cylinder portion 32A, and at the same time, the cylinder portion 32A. The first taper portion 40 is provided on the outer side of the ring member, and the ring member 2 provided with the second taper portion 41 on the inner side of the punch head 32 is fitted to the first taper portion 40. In the punch assembly (P) having a pressing member (1) in the punch head 32, which can press the ring member (2),

The technical means called the punch assembly P is provided in which the 3rd taper part 3 is provided in the upper surface of the said ring member 2. As shown in FIG.

According to the configuration of the present invention, it is necessary to engage the slit expansion member connected with the ring member in the engagement hole provided in the middle of the slit of the punch head as in the prior art (FIGS. 1 and 2 of JP-A-2003-136157). In the punching operation, even if the punch head is pressed by the ram, the weighting caused by the other pressure does not concentrate on the engaging portion of the slit expansion member and the engagement hole. This prevents the life of the punch head relaxation preventing mechanism constituted by the punch head and the ring member.

Moreover, according to the structure of this invention, the press member 1 provided in the punch head 32, for example by providing the 3rd taper part 3 in the upper surface of the ring member 2 (FIG. 3 (B)), for example When the third taper portion 3 is pressed with the release bolt 1, the ring member 2 is pressed against the negative force of the stripper spring 33 so that the punch head 32 is pressed into the ring member 2. The bolt 1 becomes the third taper part by the component T (FIG. 5) parallel to the third taper part 3 of the vertically downward force G acting on the bolt 1 while being released from the confinement of. 3) Since this slides outwards, this component T is applied to the entire punch head 32 (FIG. 2), and the punch head 32 is forcibly opened and the punch head 32 and the punch body 31 are forced to open. Becomes relatively rotatable.

According to the configuration of the present invention as described above, it relates to a punch assembly having a punch head relaxation preventing mechanism for tightly tightening the punch head to the punch body by fitting the ring member to the punch head, and at the time of punch processing B. By preventing damage to the ring member, the life of the punch head relaxation prevention mechanism constituted by the punch head and the ring member is extended, and the punch head is rotated without using an extra member other than the release bolt for rotation. The forced opening of the entire head provides the effect of providing a punch assembly that allows relative rotation of the punch head and punch body.

1 is an overall view of the present invention.

2 is a detailed view of the punch assembly P according to the present invention.

3 is an operation explanatory diagram of the present invention.

FIG. 4: is a figure which shows the relationship between the 1st taper part 40 of the punch head 32 side, and the 2nd taper part 41 of the ring member 2 side in FIG.

FIG. 5 shows a force acting when the pressing member 1 on the punch head 32 side in FIG. 3B slides on the third tapered portion 3 on the ring member 2 side. to be.

FIG. 6 is a diagram showing a state in which the punch head 32 in FIG. 3B is opened outward.

7 is a general view showing another embodiment of the present invention.

8 is a detailed view of the punch assembly P according to the present invention in FIG. 7.

FIG. 9 is a view showing the punch head 32 in FIG. 7.

FIG. 10 is a view showing a state when the punch head 32 in FIG. 7 is opened outward.

DESCRIPTION OF THE PREFERRED EMBODIMENT Hereinafter, the present invention will be described with reference to the accompanying drawings.

Fig. 1 is an overall view of the present invention and shows a case where the punch assembly P according to the present invention is applied to a turret punch press.

The turret punch press has a top 6 and a bottom 7, and a punch assembly P and a die D, respectively, and the top 6 and the bottom 7 are as well known. By synchronous rotation, the desired punch assembly P and the die D can be selected in the punch center C. FIG.

The ram 35 is provided above the punch assembly P in the punch center C. When the punch head 32 of the punch assembly P is hit by the ram 35, the die D and In cooperation, for example, the workpiece W can be drilled.

The punch assembly P has a normal punch guide 30, the punch guide 30 is supported by the upper 6 and through the lift spring 34, the upper and lower directions are guided.

The lower end of the stripper spring 33 abuts on the upper retaining collar 20 installed on the flange upper surface of the punch guide 30, and the upper end of the stripper spring 33 is applied to the lower surface of the ring member 2 to be described later. In contact, the stripper spring 33 is covered with a cover 24 as shown.

The lower retaining collar 21 is inserted into the upper retaining collar 20 to be mounted with a bolt 22, and the lower retaining collar 21 is formed of the punch guide 30 through an O-shaped ring 37. It is in contact with the inner surface of the flange.

The punch body 31 extending in the vertical direction passes through the punch guide 30, the lower retaining collar 21, the upper retaining collar 20, and the stripper spring 33, The punch head 32 is screwed together at the upper end.

A punch knife tip 38 is formed at the lower end of the punch body 31, and the punch body 31 has, for example, a male screw part 8 at the upper end thereof, and a punch head 32 at the male screw part 8. Corresponding female threaded portions 9 on the side are screwed together.

The punch head 32 has a cylinder portion 32A having the female screw portion 9 formed on the inner side thereof, and the cylinder portion 32A extends to the upper retaining collar 20 and the upper retaining collar 20 The movement distance of the punch head 32 in the up-down direction is regulated by the stopper 23 on the side of).

The external appearance of the punch head 32 has the cylinder part 32A described as shown in FIG. 2, for example, the cylindrical flange part 32B, and it spreads over the said flange part 32B and the cylinder part 32A. It has a slit 39 provided.

In this case, the slit 39 starts upward from the circular portion 39A formed in the barrel portion 32A, extends upward, falls out from the side of the female screw portion 9 of the flange portion 32B, and is opposite to the female screw portion 9. The same slit 39 is also provided.

In other words, in the case of Fig. 2, the slit 39 provided over the flange portion 32B and the cylinder portion 32A, in other words, with respect to the female screw portion 9 of the punch head 32, in other words, with respect to the screwed portion with the punch body 31. It is provided on the opposite side, and the shape of each slit 39 is the same.

According to this configuration, when the punch head 32 is opened by pressing the third taper portion 3 of the ring member 2 with the pressing member 1 described later (Fig. 6), the circular shape of the slit 39 The left part 32a and the right part 32b of the said punch head 32 are forcibly opened centering on the point (alpha) on the part 39A so that it may transfer to the left-right direction.

Further, a first taper portion 40 is provided near the flange portion 32B, which is an outer surface of the cylinder portion 32A constituting the punch head 32, and the ring portion 2 is provided on the flange portion 32B. A pressing member 1, for example, a fitting release bolt for pressing the third tapered portion 3, which will be described later, provided on the upper surface is provided.

On the other hand, as described above, the upper end of the stripper spring 33 abuts on the lower surface of the ring member 2 (FIG. 1), and the lower end of the stripper spring 33 abuts on the upper retaining collar 20. On the inner side of the ring member 2 (FIG. 2), a second taper portion 41 corresponding to the first taper portion 40 provided on the cylinder portion 32A of the punch head 32 is provided.

According to the above configuration, when the ring member 2 is raised by the force of the stripper spring 33 (Fig. 3 (A)), the second taper portion 41 of the ring member 2 is punched to the punch head 32 side. The first tapered portion 40, and the slit 39 is formed in the punch head 32 so that the punch head 32 is easily deformed and tightly tightened to the punch body 31 side. And relaxation of the punch head 32 is prevented.

In this case, the fitting state of the 2nd taper part 41 by the ring member 2 side, and the 1st taper part 40 by the punch head 32 side is as showing in FIG.

That is, the second taper portion 41 on the ring member 2 side is provided over the entire inner surface, but the first taper portion 40 on the punch head 32 side is not the entire outer surface of the cylinder portion 32A, Slits 39 are installed at positions corresponding to the positions of both sides of the slit 39 with the vertical portions 40 '(FIG. 4) perpendicular to the vertical direction of the cylinder portion 32A (FIG. 1) interposed therebetween. It is installed on both sides of the parallel to it.

The first taper portion 40 on the punch head 32 side will now be described.

When the cylindrical portion 32A of the punch head 32 is, for example, a cylinder, the first tapered portion 40 is circular in shape as shown in FIG. 4 and is parallel to it on both sides of the slit 39 as described above. It is provided between each 1st taper part 40 of the both sides of the said slit 39 so that the straight vertical part 40 'connected to each 1st taper part 40 may cross the slit 39. .

According to this configuration, when the ring member 2 is raised by the force of the stripper spring 33 (FIG. 3A) as described above, the second taper portion 41 (FIG. 4) of the ring member 2 is raised. Is fitted with the first tapered portions 40 on both sides of the slit 39 on the punch head 32 side.

At this time, as described above, the first taper portion 40 on the punch head 32 side is disposed in parallel with both sides of the slit 39, and therefore the slit 39 from the ring member 2 side. Nearly orthogonal tightening force is concentrated on each of the first tapered portions 40 of the punch head 32, and the punch head 32 is easily deformed and firmly tightened to the punch body 31 side, and the punch head 32 is relaxed. This is avoided.

In addition, a third taper portion 3 having a high inner side and a low outer side is provided on the upper surface of the ring member 2 (FIG. 3B), and the third taper portion 3 on the punch head 32 is provided. In the opposing position, for example, the flange portion 32B is provided with a bolt 1 for fitting release, that is, a bolt 1 as described above.

In this case, for example, as shown in Fig. 2, a plurality of (for example, two on the sides of the slit 39) are positioned at the outer periphery of the flange portion 32B and corresponding to the positions on both sides of the slit 39 described. 1 A of screw holes are formed, and the bolt 1 is arrange | positioned at both sides of the slit 39 so that the bolt 1 may be inserted into each screw hole 1A.

In addition, the outer circumference of the tip of the bolt 1 is rounded (FIGS. 2 and 5), whereby when the bolt 1 presses the third taper portion 3 of the ring member 2, the bolt 1 ) Can slide smoothly outward on the third tapered portion 3 without being lodged in the third tapered portion 3.

According to this configuration, when the bolt 1 is pressed to press the third taper portion 3 of the ring member 2, the ring member 2 is pressed against the biasing force of the stripper spring 33 and the punch head is pressed. As the 32 is released from the tightening force of the ring member 2, the punch head 32 is forcibly opened outward, and the relative rotation of the punch head 32 and the punch body 31 is possible.

That is, when the bolt 1 presses the 3rd taper part 3 of the ring member 2, for example, as shown to FIG. 3 (B), the bolt 1 side is carried out from the bolt 1 side to the ring member 2 side, for example. When the force G of the vertical downward is applied, the ring member 2 is pushed down by this force G, so that the punch head 32 is released from the ring member 2 as described above.

Therefore, in this state, if the bolt 1 continues to press the third taper portion 3 of the ring member 2, the bolt 1 installed in the punch head 32 released from the bondage by the ring member 2 will become a ring. The punch head 32 integral with the bolt 1 is opened outward because it slides outward on the third tapered portion 3 of the member 2.

For example, as shown in FIG. 5, when the angle of the third tapered portion 3 is φ, the force G applied by the bolt 1 is parallel to the third tapered portion 3 as shown. It can be resolved into a vertical component G × cosφ perpendicular to the component force G × sinφ.

And by the said parallel component Gxsinphi in this component force, the bolt 1 slides out on the 3rd taper part 3, and the force T = Gxsinphi acting when this slipping | slide is the punchhead 32 whole. To open outwards (FIG. 2).

In other words, the bolt 1 pushes the ring member 2 downward while forcibly opening the punch head 32 to the outside because it slides out over the third tapered portion 3 of the ring member 2.

Therefore, even if the width of the slit 39 formed in the punch head 32 is narrow, the punch head 32 is provided with a bolt 1 which slides outward on the third tapered portion 3 of the ring member 2. Since the force T = G × sinφ is applied to the whole, the punch head 32 is easily opened to the outside, thereby enabling rotation about the punch body 31.

In this case, the slit 39 is arranged symmetrically on the opposite side with respect to the female threaded portion 9 of the punchhead 32, i.e., the screwed portion with the punchbody 31, as described (Fig. 2). Similarly, bolts 1 are provided on both sides of the slit 39.

For this reason, when the punch head 32 whole is opened to the outside by the force T = Gxsinφ which acts while the bolt 1 slides on the 3rd taper part 3 of the ring member 2 (FIG. 2), As shown in FIG. 6, the left part 32a and the right part 32b of the punch head 32 with respect to the slit 39 are centered on the point α on the circular part 39A of the slit 39. Forcibly open to the left or right.

The operation of the present invention having the above configuration will be described below.

In other words, after positioning the machining position on the workpiece W (FIG. 1) to the punch center C, the upper and lower teeth 6 and 7 are synchronously rotated, and the desired punch is punched in the punch center C. When the mold P and the die assembly D are selected and the punch head 32 is pressed with the ram 35, the lift spring 34 is reduced so that the punch guide 30 descends and the workpiece W is pressed against the tip. In this state, the stripper spring 33 is reduced to lower the entire punch body 31 including the punch head 32 together with the cover 24, and the punch knife end 38 and the main body 5 of the die assembly D. The workpiece W is drilled, for example, by the die cutting edge 4.

In the meantime, the second taper portion 41 of the ring member 2 is parallel to both sides of the slit 39 on the punchhead 32 side by the force of the stripper spring 33 (Fig. 3 (A)). And the first taper portion 40 (FIG. 4) arranged so that the first taper portion 40 on the punch head 32 has a tightening force almost perpendicular to the slit 39 from the ring member 2 side. ), The punch head 32 is easily deformed and tightly tightened on the punch body 31 side, thereby preventing the punch head 32 from being relaxed.

According to the constitution of the present invention, as in the prior art (Figs. 1 and 2 of Patent Application Publication No. 2003-136157), the slit extension member connected with the ring member is engaged with the engagement hole provided in the middle of the slit of the punch head. When punching, even when the punch head 32 is pressed by the ram 35 (FIG. 1) as described above, the weight due to the other pressure causes the engagement portion of the slit extension member and the engagement hole to be punched out. Concentration of the punch head 32 and the ring member 2 is prevented from being concentrated, and thus the life of the punch head relaxation preventing mechanism constituted by the punch head 32 and the ring member 2 is reduced. Lengthened

Further, after punch processing is performed several times to wear the punch knife tip 38 and regrind the punch knife tip 38, for example, the punch height needs to be adjusted, which is why the punch head 32 and the punch body ( In the case of relative rotation with 31), the following operation is performed.

First, by pressing down the bolt 1 (FIG. 3 (B)) and pressing the 3rd taper part 3 of the upper surface of the ring member 2, the ring member 2 is applied to the force of the stripper spring 33. Pushing against, the punch head 32 is released from the tightening force of the ring member 2.

Next, in this state, when the bolt 1 continues to press the third taper portion 3 of the ring member 2, the bolt 1 provided on the punch head 32 released from the bondage by the ring member 2 Since the sliding on the third tapered portion 3 of the ring member 2 to the outside, the punch head 32 integral with the bolt 1 is opened to the outside.

That is, since the bolt 1 slides out on the third taper portion 3 of the ring member 2 while pressing the ring member 2 downward, the punch head 32 is forcibly opened to the outside.

Therefore, even if the width of the slit 39 formed in the punch head 32 is narrow, the punch head 32 is provided with a bolt 1 which slides outward on the third tapered portion 3 of the ring member 2. Since the force T = G x sinφ is applied to the whole, the punch head 32 is easily opened to the outside (Fig. 6), thereby enabling rotation with respect to the punch body 31.

As described above, according to the present invention, when the punch head 32 is rotated, the bolt 1 is replaced by the third surface of the upper surface of the ring member 2 without using an extra member other than the bolt 1 for de-fitting. The taper portion 3 is slid outward, thereby forcibly opening the entire punch head 32 so that the relative rotation of the punch head 32 and the punch body 31 is possible.

7 is a general view showing another embodiment of the present invention.

The main difference from FIG. 1 is that the cylinder portion 32A of the punch head 32 is relatively short, and the slit 39 provided over the flange portion 32B and the cylinder portion 32A of the punch head 32 has a female thread portion ( 9), the slits 39 are different from each other, and the cover 24 has a stopper function of the punch body 31.

That is, as shown in FIG. 7, the punch head 32 has the flange part 32B and the cylinder part 32A similarly, and the punch body 31 is screwed together to the said punch head 32. As shown in FIG.

And the punch head relaxation prevention mechanism is similarly comprised by fitting the ring member 2 (FIG. 7, FIG. 8) to the cylinder part 32A comparatively short compared with FIG.

Moreover, the step 32C is provided in the flange part 32B of the punch head 32 at the outer side, and this step 32C is in contact with the protrusion part 24C which protruded inward from the upper end of the cover 24. As shown in FIG. .

The lower end of the cover 24 is fixed to the retaining collar 25 provided on the flange upper surface of the punch guide 30 via a fastener 26.

According to this configuration, similarly, when punching the punch head 32 with the ram 35 during punching, the lift spring 34 is reduced so that the punch guide 30 descends and the workpiece W is pressed against the tip. As the stripper spring 33 is reduced, the entire punch body 31 including the punch head 32 is lowered inside the fixed cover 24, and the punch knife end 38 and the die assembly D are lowered. The workpiece | work W is drilled, for example by the die knife edge 4 of the main body 5 of the side.

When the ram 35 is lifted and removed from the punch head 32 after the end of processing, the fixed cover 24 is reduced since the stripper spring 33 and then the lift spring 34 are reduced initially. In the inside, the entire punch body 31 including the punch head 32 is raised, and the step 32C of the punch head 32 abuts on the protrusion 24C of the cover 24 and returns to the upper limit position.

On the other hand, the outline of the punch head 32 is shown in FIG. 9, and the slit 39 is similarly provided over the flange part 32B and the cylinder part 32A.

Fig. 9 (A) is a top view, Fig. 9 (B) is a rear view (as seen from arrow B of Fig. 9 (A)), and Fig. 9 (C) is a front view (as seen from arrow C of Fig. 9 (A)). Degrees).

1 to 6, however, the slit 39 of the present embodiment starts from the circular portion 39A 'formed in the flange portion 32B (FIG. 9A), and is the female screw portion 9 side. It falls in and extends downward through the cylinder part 32A (FIG. 9 (B)), and falls outward.

Thus, in addition to the slit 39 provided in one side (upper side in FIG. 9 (A)) of the female screw part 9, the slit 39 is also provided in the other side (lower side in FIG. 9 (A)) of the said female threaded part 9. The other side of the slit 39 falls on the side of the female screw portion 9 and falls on the step 32C side and continuously passes downward through the tube portion 32A and falls outwardly (FIG. 9 ( C)).

That is, as described above, in the present embodiment, the slit 39 (FIG. 9A) provided over the flange portion 32B and the cylinder portion 32A of the punch head 32 is the female screw portion ( In other words, with respect to 9), the slits 39 are provided on opposite sides with respect to the screwed portion with the punch body 31, and the shapes of the slits 39 are different.

According to this configuration, the bolt 1 (FIG. 8) provided on both sides of the slit 39 similarly acts by sliding on the third taper portion 3 of the ring member 2 by the force T = G × sinφ. When the entire punch head 32 is opened outward, as shown in Fig. 10, the punch head (centered around the point? On the circular portion 39A 'of the slit 39 asymmetrical with respect to the female threaded portion 9) is shown. The left part 32a of 32 is forcibly opened outward so as to be transferred clockwise (arrow A) and the right part 32b counterclockwise (arrow B).

The operations and effects of the other members and the whole of the embodiment of FIGS. 7 to 10 are the same as those of the embodiments of FIGS. 1 to 6 described above, and detailed descriptions thereof are omitted.

As described above, the present invention relates to a punch assembly having a punch head relaxation preventing mechanism for tightly tightening the punch head to the punch body by fitting the ring member to the punch head. This prevents breakage of the punch head and extends the life of the punch head relaxation prevention mechanism constituted by the ring head and the entire punch head without using an extra member other than the release bolt for rotation of the punch head. It is used for punch assemblies that allow the relative rotation of the punch head and punch body because it is forcibly opened. It is also very useful for single punch presses and other general press machines as well as turret punch presses.

Claims (4)

The punch head has a punch head that can be mated with the punch body, and the punch head is provided with a slit from a flange portion to a cylinder portion, and a first taper portion is provided on an outer surface of the cylinder portion, and is fitted with the first taper portion of the punch head. A punch assembly having a ring member provided on an inner side of a second tapered portion, and having a pressing member capable of pressing the ring member on a punch head, Punch assembly, characterized in that the third taper is provided on the upper surface of the ring member. The method of claim 1, The first tapered portion is provided on both sides of the slit in parallel with it, both first tapered portion is provided with a vertical portion between the punch assembly. The method of claim 1, And the third taper portion is formed with a high inner side and a low outer side. The method of claim 1, The pressing member is a punch assembly, characterized in that formed by the release bolt for releasing the engagement of the ring member to the punch head, the outer periphery of the tip of the bolt is formed round.

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