JP3119704U - Punch holding device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a punch holding device capable of easily and quickly changing a punch by a one-touch operation.
A sliding groove 2c communicating with the punch insertion hole 2a from the outside is provided at a position facing the engagement groove 3a of the punch 3 on the front side in the longitudinal direction of the punch holder 2, and the sliding groove 2c is provided with the sliding groove 2c. A punch presser 6 having a presser part 6b which can be engaged with the engaging groove 3a at one end of the small diameter shaft part 6a and has substantially the same cross-sectional shape as the sliding groove 2c, and a detachable knob 6c at the other end. Is slidable along the sliding groove 2c. Around the opening of the sliding groove 2c, there is provided a through hole 7a that allows only the small-diameter shaft portion 6a to pass therethrough, and a lid 7 that closes the upper side of the sliding groove 2c is provided. A spring 8 is interposed between the portion 6 b and the inner surface of the lid body 7, and the pressing portion 6 b is normally engaged with the engagement groove 3 a by the spring 8 to hold the punch 3 in the punch holder 2. did.
[Selection] Figure 1

Description

  The present invention relates to a punch holding device of a forging machine that performs forging processing of a predetermined shape with a punch and a die.

Conventionally, for example, as a punch holding device that can easily and easily replace a punch by a fastening operation with a fastening bolt, a punch mounting portion at a front portion of a punch holder having a punch punch insertion hole is integrated with a punch receiving portion integrated with the punch holder side. The punch presser is divided into a separate punch presser, and the punch presser is detachably fitted to the punch receiving part, and the punch presser is received by two fastening bolts on both sides of the center punch. What is comprised so that it may clamp | tighten and fix to a part is known (for example, refer patent document 1).
Japanese Utility Model Publication No. 56-10424

  By the way, in the punch holding device provided with the left and right fastening bolts as described above, the punch can be firmly fixed by fastening the punch presser to the punch receiving portion with both fastening bolts. However, if you need to change the punch frequently, loosen the left and right fastening bolts every time you replace them, remove the punch, insert a new punch, and then tighten the left and right fastening bolts again. It is necessary to tighten and fix. For this reason, there has been a problem that the work of exchanging the punch is very troublesome and time-consuming.

  Therefore, an object of the present invention is to provide a punch holding device that can easily and quickly change the punch by a one-touch operation.

  In order to solve the above-described problem, the present invention includes a punch holder having a punch insertion hole, and a punch having an engagement groove on the outer periphery of the intermediate portion in the length direction and removably inserted into the insertion hole. A sliding groove communicating with the punch insertion hole from the outside is provided at a position facing the engagement groove on the front side in the longitudinal direction of the punch holder, and the sliding groove is provided at one end of the small-diameter shaft portion. A punch presser body that has a holding part that is engageable with the engaging groove and that has substantially the same cross-sectional shape as the sliding groove and that has a detachable knob at the other end is slidably provided. Around the outer opening, there is provided a lid that has a through hole that allows only the small-diameter shaft portion to pass through and closes the upper side of the sliding groove, and between the presser of the punch presser and the inner surface of the lid A spring is inserted in the punch, and the presser part is normally engaged with the engaging groove by this spring so that the punch is punch-held. It is configured so that the gripping part can be pulled out outward against the spring when the punch is replaced, so that the engagement between the presser part and the engaging groove is released and the punch can be removed from the punch holder. It is characterized by that.

  According to the present invention, with the above-described configuration, the presser portion of the punch presser is normally engaged with the engagement groove of the punch by the spring to hold the punch in the punch holder. By pulling the part outward against the spring, the punch presser is moved outward along the sliding groove, the engagement between the presser part and the engagement groove is released, and the punch is pulled out from the punch holder. Therefore, it can be easily and quickly taken out. In this state, a new punch is inserted into the punch fitting hole of the punch holder, and the punch holding part of the punch presser is simply released to engage the presser part of the punch presser with the engagement groove of the punch. Can be quickly and easily attached to the punch holder. Therefore, the punch can be easily and quickly replaced with a one-touch operation.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 and 2 show a punch holding device 1 applied to a forging machine. The punch holding device 1 has a punch insertion hole 2a at the front in the length direction and a punch insertion hole at the rear in the length direction. A punch holder 2 having a spacer insertion hole 2b communicating with 2a, and a punch 3 having an engagement groove 3a on the outer peripheral upper portion on the rear end side in the length direction and removably inserted into the insertion hole 2a. Yes. In FIG. 1, reference numeral 4 denotes a punch case mounted on the front surface of a ram (not shown), and a punch holder is fixed to the punch case 4 through fixing means as appropriate. A spacer 5 is inserted and held in the spacer insertion hole 2b of the punch holder 2, and the rear end of the spacer 5 is received by a load receiving body 41 provided on the punch case 4 side.

  A sliding groove 2c that communicates with the punch insertion hole 2a from above is provided vertically at a position facing the engagement groove 3a on the front side in the longitudinal direction of the punch holder 2, and the opening of the sliding groove 2c is provided. A flat cutout 2d is formed around the portion. A punch presser 6 is provided in the sliding groove 2c so as to be slidable along the sliding groove 2c. The punch presser 6 is provided with a small diameter shaft portion 6a and a lower end thereof, a presser portion 6b that can be engaged with the engagement groove 3a and has substantially the same cross-sectional shape as the sliding groove 2c, and an upper end of the small diameter shaft portion 6a. And a detachable knob 6c. Further, the flat cutout portion 2d of the sliding groove 2c is provided with a through hole 7a that allows only the small diameter shaft portion 6a to pass therethrough, and a lid body 7 that closes the upper side of the sliding groove 2c is provided. A spring 8 is interposed between the presser portion 6 b of the presser body 6 and the inner surface of the lid body 7.

  The spring 8 is normally configured to hold the punch 3 in the punch holder 2 by engaging the presser portion 6b with the engagement groove 3a. When replacing the punch 3, the knob 6c is opposed to the spring 8 and moved upward. By pulling it up, the engagement between the presser portion 6b and the engagement groove 3a is released, and the punch 3 can be pulled out from the punch holder 2 and taken out.

  In the embodiment shown in the figure, a recess 7b allowing insertion of the upper end of the spring 8 is formed on the lower surface of the lid 7, and the lid 7 is fixed to the flat notch 2d of the punch holder 2 by screwing. Yes.

Next, the operation of the punch holding device 1 having the above configuration will be described.
First, when the punch 3 is attached to the punch holder 2, the knob 6c of the punch presser 6 is lifted upward against the spring 8 so that the punch presser 6 is moved upward along the slide groove 2c, that is, the slide. Move into the moving groove 2c. In such a state, the punch is fitted into the punch fitting hole 2a of the punch holder 2 while aligning so that the presser portion 6b of the punch presser 6 and the engagement groove 3a of the punch 3 are aligned. Thereafter, by releasing the knob 6c of the punch presser 6, the presser 6b of the punch presser 6 can be engaged with the engagement groove 3a of the punch 3 by the spring 8, and the punch 3 can be attached to the punch holder 2. .

  Next, when replacing the punch 3, the punch presser 6 is moved upward along the sliding groove 2 c by pulling the knob 6 c of the punch presser 6 upward against the spring 8. The engagement between the presser portion 6b and the engagement groove 3a is released, and the punch 3 is pulled out from the punch holder 2 and taken out. Then, the new punch 3 is inserted into the punch fitting hole 2a of the punch holder 2 while the presser part 6b is pulled upward, and the presser part 6b is moved to the punch 3 by the spring 8 simply by releasing the knob part 6c. The punch 3 can be attached to the punch holder 2 by engaging with the engaging groove 2c. As a result, the punch 3 can be easily and quickly replaced with a one-touch operation.

  In the above description, when the punch 3 is inserted into the punch fitting hole 2 a of the punch holder 2, the knob 6 c of the punch presser 6 is lifted upward against the spring 8, and then the punch 3 is removed from the punch holder 2. The punch 3 is inserted into the punch fitting hole 2a. For example, the punch 3 is held in the punch holder by using the inclination of the chamfered inclined portion 3b on the rear end side of the punch 3 and the front end inclined portion 6d of the pressing portion 6b of the punch pressing body 6. 2 is automatically pulled up against the spring 8, and the punch 3 is inserted to engage the presser portion 6b with the engagement groove 3a. Of course, they may be combined.

  In addition, as shown by the phantom line in FIG. 1, a lock screw 9 is provided on the front surface of the lid body 7 so as to prevent the punch presser body 6 from being lifted with respect to the sliding groove 2c by tightening the lock screw 9 during forging. Also good. Moreover, as a shape of the front-end | tip part of punch 3, other than hexagonal cross section as shown in FIG. 1, for example, polygons, such as a 4-12 angle | corner, round shape or an irregular shape may be sufficient Of course. In this case, for example, on the upper surface of the intermediate portion in the longitudinal direction of the punch 3, a positioning mark for aligning the engagement groove 3a of the punch 3 with the pressing portion 6b of the punch pressing body 6, for example, a mark or a recess (not shown) It is preferable to apply or form Furthermore, in the embodiment shown in the figure, the knob 6c of the punch presser 6 is fixed to the upper end of the small-diameter shaft 6a by screwing, but may be fixed by appropriate fixing means such as pinning.

Further, the position of the slide groove formed on the punch holder may be provided on the upper side of the punch holder as in the above-described embodiment, or on the side or lower side.
Punch presser body with child

  It is a vertical side view of the punch holding device according to the present invention.   It is the same top view.   It is the longitudinal section front view.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Punch holding device 2 Punch holder 2a Punch insertion hole 2c Sliding groove 3 Punch 3a Engaging groove 6 Punch presser body 6a Small diameter shaft part 6b Presser part 6c Knob part 7 Lid body 8 Spring

Claims (1)

  A punch holder having a punch insertion hole; and a punch having an engagement groove on the outer periphery of the length direction intermediate portion and removably inserted into the insertion hole, and the punch holder in the longitudinal direction front side. A sliding groove communicating with the punch insertion hole from the outside is provided at a position facing the engaging groove, and the sliding groove can be engaged with the engaging groove at one end of the small-diameter shaft portion and is almost the same as the sliding groove. A punch presser body having a presser part having the same cross-sectional shape and a detachable knob part at the other end is slidably provided, while only the small diameter shaft part is penetrated around the outer opening of the slide groove. And a cover that closes the upper side of the sliding groove is provided, and a spring is interposed between the presser of the punch presser and the inner surface of the cover, and this spring normally It is configured to hold the punch on the punch holder by engaging the presser part with the engagement groove, and replace the punch Punch holding apparatus characterized by being configured to take out the punch to release the engagement between the pressing portion and the engaging groove by pulling outwardly against the knob the spring from the punch holder to.

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