JP4939911B2 - Punch mold - Google Patents

Description

  The present invention relates to a punch die used by being mounted on a punch press such as a turret punch press, and more specifically, any tool is used for height adjustment after re-polishing after a long period of use. The present invention relates to a punch mold that can be easily performed without any problems.

  A punch die used for a punch press is reused by repolishing a worn punch blade portion after a long period of use. As described above, when the polishing of the punch blade portion is performed, the length of the punch die is changed. Therefore, the length of the portion shortened by the repolishing is adjusted. Since the adjustment is generally performed using a tool, there is a problem that the management of the tool is troublesome.

Therefore, a punch die that can perform height adjustment (length adjustment of the punch die) without using any tool has been proposed (see, for example, Patent Document 1).
JP-A-10-244327

  The punch die described in Patent Document 1 has a configuration as shown in FIG. That is, the punch die 1 includes a punch body 7 having a punch blade portion 5 at a lower end portion in a cylindrical punch guide 3 so as to be movable up and down. A retainer collar 9 detachably provided on the upper portion of the punch guide 3 is provided with a cylindrical portion 11 which is long in the upward direction. A fixing ring 13 is integrally formed on the upper inner surface of the cylindrical portion 11. Screwed on. A ring-shaped spring seat 15 is disposed below the fixing ring 13 in the cylindrical portion 11 so as to be movable up and down. A powerful stripper spring is interposed between the spring seat 15 and the retainer collar 9. 17 is armored.

  In order to adjust the length after re-grinding the punch blade portion 5, a punch head 19 is disposed inside the fixing ring 13, and a punch driver 21 extending downward from the punch head 19 is provided. A male threaded portion 22 is formed at the lower portion of the inner threaded portion, and the male threaded portion 22 is screwed into the female threaded portion formed in the punch body 7 so that the position thereof can be adjusted. In order to adjust the length by rotating the punch driver 21 relative to the punch body 7, the punch body 7 has a vertical keyway formed in the inner peripheral surface of the punch guide 3. An anti-rotation key 25 engaged with the upper and lower portions 23 is integrally attached. A plurality of key grooves 27 in the vertical direction are formed on the outer peripheral surface of the punch head 19 at appropriate intervals in the circumferential direction, and the fixing ring 13 is used for detents engaged with the key grooves 27. A key 29 is attached.

  In the above configuration, when the height adjustment (the length adjustment of the punch die 1) is performed after the polishing of the punch blade portion 5, the key groove 27 and the fixing ring formed in the punch head 19, as shown in FIG. 13, the punch head 19 and the punch body 7 are lifted so as to be disengaged from the key 29 provided on the head 13. In this lifted state, the punch head 19 and the punch driver 21 are relatively rotated with respect to the punch body 7, and a male screw portion 22 formed on the punch driver 21 and a female screw portion formed on the punch body 7. The screwed state is adjusted.

  In the case where the punch body 7 and the punch driver 21 are integrally provided and the male screw portion formed on the upper end portion of the punch driver 21 and the punch head 19 are screwed together so that the position can be adjusted, the same as described above. The operation is performed.

  That is, in the conventional configuration, it is necessary to lift the punch body 7 with respect to the punch guide 3 and release the engagement between the key groove 27 formed in the punch head 19 and the key 29 provided in the fixing ring 13. Therefore, there is a problem that the operation of lifting the heavy punch head 19 or the like is troublesome. Further, since the punch head 19, the punch body 7 and the like can be extracted upward with respect to the punch guide 3 and the like, a mechanism for preventing the punch head 19 from jumping out of the fixing ring 13 at the time of returning to the upper position during punching processing. (See FIG. 3 of Patent Document 1), and there is a problem that the configuration becomes complicated. Furthermore, there is a problem that the key groove 23 in the vertical direction needs to be processed on the inner surface of the punch guide 3.

The present invention has been made in view of the above-described problems, and a retainer collar is detachably provided on an upper portion of a cylindrical punch guide in which a punch body having a punch blade portion at the lower end portion is movably mounted. An upper limit of the spring seat with respect to the retainer collar is provided between the spring collar provided above the retainer collar so as to be movable up and down and a biasing means for biasing the spring seat upward. A punch die having a position that can be freely regulated, and a head member having a male screw portion formed on an upper end portion of the punch body and a female screw portion that can be screwed together is provided on the upper portion of the spring seat with respect to the spring seat. And a rotation-preventing member engaged with a vertical slit formed in an upper end portion of the punch body so as to be movable up and down. With the grayed seat, freely regulating arrangement the upper limit position of the spring seat relative to the retainer collar, the tubular member integrally provided with the retainer collar, the engaged portion provided in the spring seat from above The head member is configured to always protrude upward from the spring seat and the cylindrical member so that the head member can be gripped in a normal state. The locked portion provided at the lower end portion of the head member is locked in the step portion of the inner flange and is in a state of being relatively rotatably sandwiched between the inner flange and the spring seat. It is a feature.

  Further, in the punch mold, the structure in which the head member can be rotated and fixed with respect to the spring seat is such that the engaging portion of the lock piece provided on the punch head or the spring seat so as to be movable in the radial direction is a circumference. A circumferential permissible portion capable of passing in the direction and a plurality of locking recesses communicating with the rotation allowing portion in the circumferential direction, and the locking portion of the lock piece is kept engaged with the locking recess. The lock piece is biased in the radial direction.

  According to the present invention, the height adjustment can be performed by rotating the head member screwed into the male screw portion formed at the upper end portion of the punch body without using any tool. Further, it is not necessary to form a key groove in the vertical direction on the inner surface of the punch guide, the processing becomes easier, and the conventional problems as described above can be solved.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of the present invention will be described with reference to the drawings. Components having the same functions as those of the conventional components described above are denoted by the same reference numerals, and redundant description is omitted.

  Referring to FIG. 1, a punch die 1 according to an embodiment of the present invention includes a cylindrical punch guide 3 as in the conventional punch die described above. A punch body 7 provided with a punch blade portion (not shown in FIG. 1) is internally mounted (inserted) in a vertically movable manner. A punch head unit is provided on the punch guide 3. That is, a retainer collar 33 is detachably attached to the upper portion of the punch guide 3 via a ring-shaped fixture 31, and a cylindrical tube is attached to the retainer collar 33 via a ring-shaped fixture 35. A cylindrical member 37 is integrally attached. A ring-shaped inner flange 39 protruding inward is formed on the upper portion of the cylindrical member 37.

  The cylindrical member 37 may be configured to be integrated with the retainer collar 33 in the same manner as the conventional configuration described above. In this case, the inner flange 39 may be configured separately from the tubular member 37 and screwed and integrated with the tubular member 37.

  An annular spring seat 41 is mounted in the tubular member 37 above the retainer collar 33 so as to be movable up and down, and a powerful stripper spring is interposed between the spring seat 41 and the retainer collar 33. The urging means 43 such as the above is mounted. Therefore, the spring seat 41 is always urged upward. The upward movement of the spring seat 41 is restricted by the cylindrical member 37. In other words, the cylindrical member 37 has the inner flange 39 as a locking portion that locks the vicinity of the outer peripheral edge of the upper surface as the locked portion of the spring seat 41 from above and restricts the upward movement. It has.

  A head member 45 is positioned above the spring seat 41 so that it can always be gripped. In this embodiment, the head member 45 protruding upward from the inner flange 39 and the spring seat 41 is rotatable on the spring seat 41 and can be fixed integrally with the head member 45 on the spring seat 41. Is placed. The head member 45 is restricted from jumping upward from the tubular member 37 by the locked portion 47 provided at the lower end being locked to the step portion of the inner flange 39 as the locking portion. Has been. That is, the locked portion 47 is sandwiched between the inner flange 39 and the spring seat 41 so as to be relatively easily rotatable. The head member 45 is formed with a female screw portion 51 that is screwed with a male screw portion 49 formed at the upper end portion of the punch body 7.

  When the head member 45 is rotated with respect to the male screw portion 49, a vertical slit (groove) 53 reaching the upper end surface is provided near the upper end portion of the punch body 7 in order to hold the punch body 7 in a fixed state. The rotation preventing member 55 provided in the spring seat 41 is engaged with the slit 53 so as to be relatively movable up and down. Therefore, due to large friction when the spring seat 41 is pressed against the inner flange 39 of the cylindrical member 37 by the biasing force of the biasing means 43, and due to large friction due to contact between the biasing means 43 and the spring seat 41. The rotation of the spring seat 41 and the punch body 7 around the axis is suppressed.

  A locking device 57 is provided between the spring seat 41 and the head member 45 in order to fix the head member 45 to the spring seat 41 so as not to rotate. That is, the head member 45 is provided with an engagement recess in the radial direction (radial direction), and a lock piece 59 is engaged with the engagement recess so as to be movable in the radial direction. The lock piece 59 is urged radially outward by an elastic member 61 such as a spring elastically mounted on the engagement recess. Note that the lock piece 59 is regulated by a stopper (not shown) so as not to come out of the engagement recess in the radially outward direction.

  The lock piece 59 is provided with a pin-shaped engaging portion 63 protruding toward the spring seat 41 side. A circumferential groove 65 is formed on the upper surface of the spring seat 41 as a rotation allowing portion through which the locking portion 63 can pass in the circumferential direction. A plurality of radially outward locking recesses 67 are provided at appropriate intervals in the circumferential direction.

  Since it is relative whether the lock piece 59 is provided on the head member 45 side or the spring seat 41 side, the lock piece 59 is provided on the spring seat 41 side, and the circumferential groove 65 and the locking recess 67 are provided. It is also possible to adopt a configuration in which the is provided on the head member 45 side. In this case, a hole or the like is formed in a part of the cylindrical member 37 so that the lock piece 59 provided on the spring seat 41 can be operated from the outside.

  In the above configuration, the retainer collar 33, the cylindrical member 37, the spring seat 41, the urging means 43, the head member 45, etc. constitute a punch head unit that can be attached to and detached from the punch body 7 and the punch guide 3. It is.

  In the above-described configuration, in the normal state, the locking portion 63 of the lock piece 59 in the locking device 57 is engaged with the locking recess 67 at an appropriate position formed in the spring seat 41, and Thus, the head member 45 is fixed in an unrotatable state and integrated. Then, when the punch die 1 is lowered by hitting the upper surface of the head member 45 with a striker (ram) provided in the punch press so as to be movable up and down, like the conventional punch die, the lower end portion of the punch guide 3 is used. A plate-like workpiece is pressed and fixed to the upper surface of a die (not shown). Thereafter, when the head member 45 is further lowered against the urging force of the urging means 43, the punch blade portion provided at the lower end portion of the punch body 7 and the die hole provided in the die act on the workpiece. Punching is performed.

  When the workpiece is punched as described above, the head member 45 and the spring seat 41 always move up and down integrally. The upper limit of the head member 45 is restricted by the inner flange 39 of the cylindrical member 37, so that the head member 45 and the like do not protrude upward.

  After that, when the punch blade portion is worn due to long-term use, the punch blade portion is re-polished. At this time, the locking piece 59 in the locking device 57 is pressed and moved inwardly against the urging force of the elastic member 61, whereby the locking portion 63 in the locking piece 59 is detached from the locking recess 67 and the circumferential groove 65. Located in the position. Accordingly, the head member 45 can be gripped and the head member 45 can be rotated with respect to the spring seat 41, and the screwed state between the male screw portion 49 of the punch body 7 and the female screw portion 51 of the head member 45 is released. Thus, the punch body 7 can be removed from the head member 45 downward.

  As described above, after removing the punch body 7 and re-polishing the punch blade portion, after engaging the slit 53 formed in the upper end portion of the punch body 7 and the anti-rotation member 55 provided in the spring seat 41, By re-engaging the male threaded portion 49 of the punch body 7 and the female threaded portion 51 of the head member 45, the original state can be restored. Then, as described above, the head member 45 is rotated to adjust the screwed state between the male threaded portion 49 of the punch body 7 and the female threaded portion 51 of the head member 45, thereby moving the punch body 7 relatively up and down. Thus, height adjustment (punch mold length adjustment) can be performed.

  As can be understood from the above description, the lock piece 59 in the lock device 57 is pressed against the urging force of the elastic member 61 to release the lock in the lock device 57, and to grip and rotate the head member 45. Is something that can be done. That is, the head member 45 can be easily rotated without using any tool, and the conventional problems as described above can be solved.

  Further, since the rotation preventing member 55 provided in the spring seat 41 is engaged with the slit 53 formed in the upper end portion of the punch body 7, the rotation of the punch body 7 is restricted. It is not necessary to process the key groove in the vertical direction, and the processing becomes easier. Further, the processing of the slit 53 of the punch body 7 is easy, the processing of the constituent elements in the overall configuration is easy, and the configuration can be simplified.

  FIG. 2 shows a second embodiment of the punch head unit used in the punch die according to the present invention, and the same reference numerals are given to the constituent elements having the same functions as the constituent elements described above. Description is omitted.

  In this second embodiment, the cylindrical portion 37A of the cylindrical member 37 is disposed inside the stripper spring as the biasing means 43, and the spring seat 41 is vertically moved above and below the cylindrical portion 37A of the cylindrical member 37. A cylindrical downward extending portion 41A that is movably fitted is integrally provided, and is locked to an outer peripheral surface of the downward extending portion 41A by an engaging portion 37B formed on the inner peripheral surface of the cylindrical portion 37A. The fixing device 69 is provided as a ring-shaped retaining portion for retaining the ring. The head member 45 that always protrudes upward from the spring seat 41 so as to be always graspable with the spring seat 41 is fixed by a ring-shaped fixing tool 71 so as not to be detached in the vertical direction and is relatively rotatable. It is an assembled structure.

  The punch head unit having the above-described configuration is mounted on the upper portion of the punch guide 3, and the male thread portion 49 formed on the upper end portion of the punch body 7 that is fitted in the punch guide 3 so as to be movable up and down is the female thread portion 51 of the head member 45. By screwing into the above, the same effect as the punch mold described above can be obtained.

  In the above-described configuration, the locking recess 67 that is detachable from the locking portion 59 of the lock piece 59 in the locking device 57 is formed in a ring-shaped protruding portion 73 provided on the upper surface of the spring seat 41. is there. Therefore, the portion passing in the circumferential direction so that the locking portion 63 of the lock piece 59 rotates inside the protruding portion 73 corresponds to the rotation allowing portion.

It is sectional explanatory drawing which shows the principal part of the punch metal mold | die which concerns on embodiment of this invention. It is a section explanatory view of a punch head unit concerning a 2nd embodiment. It is sectional explanatory drawing of the conventional punch metal mold | die. It is explanatory drawing which shows the state at the time of adjustment of the conventional punch metal mold | die.

Explanation of symbols

3 Punch guide 7 Punch body 33 Retainer collar 41 Spring seat 43 Biasing means (stripper spring)
45 Head member 49 Male thread 51 Female thread 53 Slit (groove)
55 Locking member 57 Locking device

Claims (2)

A retainer collar is detachably attached to an upper portion of a cylindrical punch guide having a punch body provided with a punch blade portion at the lower end portion so as to be movable up and down, and a spring seat provided above the retainer collar and movable up and down. A punch die having a biasing means for biasing the spring seat upward between the retainer collar and an upper limit position of the spring seat with respect to the retainer collar. A head member having a male threaded portion that can be screwed together with a male threaded portion formed on the upper end of the punch is provided on the upper part of the spring seat so as to be rotatable and fixed with respect to the spring seat, and formed on the upper end of the punch body was the vertical move up and down slit freely engaged detent member provided on said spring seat, said with respect to the retainer collar sprint The upper limit position of the seat can be regulated by an inner flange as a locking portion that can lock the locked portion provided in the spring seat from above on a cylindrical member that is integrally provided in the retainer collar. The head member is configured to always protrude upward from the spring seat and the cylindrical member so that it can be gripped in a normal state, and the locked member provided at the lower end of the head member The punch metal mold is characterized in that the portion is engaged with the stepped portion of the inner flange and is sandwiched relatively rotatably between the inner flange and the spring seat. 2. The punch mold according to claim 1, wherein the head member can be rotated and fixed with respect to the spring seat by locking the lock piece provided in the punch head or the spring seat so as to be movable in a radial direction. A plurality of circumferentially permissible portions through which the portion can pass in the circumferential direction and a plurality of latching recesses communicating with the circumferentially permitted portion in the circumferential direction, and the state in which the latching portions of the lock pieces are engaged with the latching recesses is maintained. The punch mold is characterized in that the lock piece is biased in the radial direction.

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