JP2018153829A - Upper die - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an upper die capable of keeping a punch holder and a retainer in an upper die integrated in a state of rotation incapability.SOLUTION: An upper die comprises: a circular arrangement of a plurality of punch tips 19A, 19B,... at the inner lower end part of a cylindrical punch holder 15; a striking part 25P capable of individually striking the punch tips 19A, 19B,... at the lower end part of a punch body 25 fitted with the punch holder 15 to be capable of vertical movements and relative rotation, and, in the punch body 25, a retainer collar 29 to be capable of vertical movements, and to energize the punch holder 15 downward to pressure the same; and, in the punch holder 15, to hold the positional relation between a key 35 provided in the retainer collar 29 and a key groove 15K provided in the punch holder 15 always in a constant positional relation in a non-use state, a recess part 43 with which a lock pin 47 provided in the retainer collar 29 to be capable of vertical movements can be engaged.SELECTED DRAWING: Figure 2

Description

  The present invention relates to an upper die used by being mounted on an auto index die holding device as described in, for example, Japanese Patent Laid-Open No. 10-328759. More specifically, the present invention relates to an upper die that can be automatically attached and detached using, for example, an automatic tool changer (ATC).

  There is a stamping die as an upper die that is used by being mounted on the above-described auto index die holding device (see Patent Document 1).

JP-A-6-198352

  2. Description of the Related Art Conventionally, there is an upper mold having a structure as shown in FIG. 1 as an upper mold used by being mounted on an auto index mold holding device. In order to facilitate understanding of the overall configuration, a general description will be given with reference to FIG.

  Referring to FIG. 1, the upper and lower turrets 1U and 1L as upper and lower mold holders in a turret punch press (not shown) are provided with the above-described auto index mold holding devices 3U and 3L, respectively. In addition, illustration and description are abbreviate | omitted about the auto index die holding | maintenance apparatus 3L with which the lower turret was equipped.

  Now, the upper turret 1U is provided with a cylindrical guide sleeve 5 rotatably. A gear (worm wheel) 7 for rotating the guide sleeve 5 is provided above the guide sleeve 5. An elevating plate 11 is provided on the upper turret 1U through a plurality of coil springs 9 so as to be movable up and down. The elevating plate 11 is integrally provided with a holder sleeve 13 fitted into the guide sleeve 5 so as to be movable up and down from above.

  A cylindrical punch holder 15 is provided in the holder sleeve 13 so as to be detachable and replaceable. That is, the lower end portion of the holder sleeve 13 is provided with an inner flange 13F. The upper end of the punch holder 15 is provided with a flange 15F that can be placed on the inner flange 13F. That is, the punch holder 15 is supported so as to be removable upward with respect to the holder sleeve 13.

  A disc-shaped holder plate 17 is integrally provided at the lower end of the punch holder 15. A plurality of punch tips 19 </ b> A, 19 </ b> B,... Are circularly arranged inside the punch holder 15 of the holder plate 17. The punch tips 19A, 19B,... Are supported by the holder plate 17 so as to be movable up and down and are urged upward by coil springs 21, respectively. The upward movement of the holder plate 17 is restricted by a disc-like restriction plate 23 provided integrally therewith.

  A punch body 25 is fitted in the punch holder 15 so as to be movable up and down and relatively rotatable. .. Are provided on the lower surface of the punch body 25 so as to protrude downward. The punching portions 25P can individually press the punch tips 19A, 19B,. A portion of a small-diameter punch driver 27 provided integrally on the upper portion of the punch body 25 protrudes from the upper portion of the punch holder 15.

  A retainer collar 29 is fitted to the punch driver 27 so as to be movable up and down. A coil spring 33 is mounted between the punch head 31 provided at the upper end of the punch driver 27 and the retainer collar 29. Therefore, the flange 15F of the punch holder 15 is pressed and urged onto the inner flange 15F of the holder sleeve 13.

  In order to restrict the rotation of the retainer collar 29 with respect to the punch body 25, a pin 29P provided on the retainer collar 29 is engaged with a vertical key groove 25K formed in the punch body 25 so as to be movable up and down. . In order to restrict the rotation of the punch body 25, the key 35 provided in the retainer collar 29 is slidably engaged with a vertical slit (key groove) 37 formed in the holder sleeve 13. is there. Therefore, the striking pressure portion 25P provided in the punch body 25 always moves up and down at a fixed position.

  In order to index and position the punch tips 19A, 19B,... At positions below the punching portion 25P in the punch body 25, a vertical keyway 15K is formed on the outer peripheral surface of the punch holder 15. A key 5K provided in the guide sleeve 5 is engaged with the key groove 15K so as to be relatively movable up and down. Note that the key groove 15K and the key 5K are provided in a relative manner. Therefore, the punch holder 15 may be provided with a key, and the guide sleeve 5 may be provided with a key groove.

  With the above configuration, when the guide sleeve 5 is rotated via the gear 7, the desired punch tips 19 </ b> A, 19 </ b> B,... Can be indexed and positioned below the striking portion 25 </ b> P of the punch body 25. Then, the workpiece W can be pressed by a desired punch tip 19A, 19B,... By striking the punch head 31 with a striker (not shown) provided in the punch press so as to be movable up and down.

  By the way, when the punch head 31 is held and the punch driver 27 is lifted, the punch holder 15 and the like can be removed from the holder sleeve 13 and the guide sleeve 5 upward. Then, the position of the key groove 15K in the punch holder 15 is aligned with the position of the key 5K provided in the guide sleeve 5, and the position of the key 35 provided in the retainer collar 29 is set to the position of the key groove 37 formed in the holder sleeve 13. By adjusting to the above, the upper mold provided with the punch holder 15 can be mounted again in the original state.

  As already understood, when the upper mold is mounted on the guide sleeve 5 or the like, the key groove 15K provided in the punch holder 15 and the key 5K provided in the guide sleeve 5 need to be aligned. Further, it is necessary to match the positions of the key groove 37 of the holder sleeve 13 and the key 35 provided on the retainer collar 29. Here, the punch holder 15 and the retainer collar 29 are relatively rotatable.

  Therefore, the positional relationship between the key groove 15K of the guide sleeve 15 and the key 35 of the retainer collar 29 is not always in a fixed positional relationship. Therefore, when the upper mold is attached to and detached from the guide sleeve 5 or the like, the alignment of the two keys 5K and 35 and the key grooves 15K and 37 is troublesome. Moreover, it is almost impossible to replace the upper mold using ATC.

  The present invention has been made in view of the conventional problems as described above, and a holder sleeve is provided at a position above a cylindrical guide sleeve rotatably supported by an upper mold holder in a punch press so that the holder sleeve can only move up and down. An upper die that is detachable and replaceable with respect to the rotary die holder having the above-described configuration, and is inside the cylindrical punch holder that is rotatably and vertically movable supported by an inner flange provided at the lower end portion of the holder sleeve. A plurality of punch tips are arranged in a circular shape at the lower end, and each punch tip can be individually pressed to the lower end of the punch body that is vertically movable and relatively rotatable in the punch holder. The punch body is provided with a retainer collar that presses a flange provided at the upper end of the punch holder onto the inner flange of the holder sleeve. The retainer collar is provided with a key that is urged downward and is movably engaged with a vertical guide groove provided on the holder sleeve, and the key provided on the guide sleeve is relatively moved up and down. In order to maintain the positional relationship between the key provided in the retainer collar and the key groove provided in the punch holder in a fixed positional relationship, the vertical key groove that freely engages is provided in the punch holder. The retainer collar is provided with a recess on the upper surface of the punch holder, which is capable of engaging and disengaging a lock pin that can be moved up and down.

  In the upper mold, a push-up pin that pushes up the lock pin when the flange of the punch holder is placed on the inner flange of the holder sleeve in the recess of the punch holder is movable up and down. ing.

  Further, a plurality of punch tips are arranged in a circular shape at the inner lower end of the cylindrical punch holder, and the lower end of the punch body fitted in the punch holder so as to be vertically movable and relatively rotatable, Each punch tip is provided with a punching part that can be pressed individually, and a retainer collar is provided on the punch body so as to be movable up and down, and is urged downward to press the punch holder. In order to keep the positional relationship between the key and the keyway or key provided in the punch holder in a constant positional relationship when not in use, the retainer collar is engaged with a lock pin that can be moved up and down. The punch holder is provided with a possible recess.

  According to the present invention, the punch holder and the retainer collar in the upper mold can be integrally held in a relatively non-rotatable state. Therefore, the upper mold can be attached and detached using ATC.

It is explanatory drawing which shows the structure of the state which mounted | wore the conventional auto index metal mold | die holding | maintenance apparatus with the upper metal mold | die. It is explanatory drawing which shows the structure of the upper metal mold | die which concerns on this embodiment.

  The configuration of the upper mold 41 according to the embodiment of the present invention is as shown in FIG. In the upper mold 41, components having the same functions as those described above are denoted by the same reference numerals, and redundant description is omitted.

  As shown in FIG. 2, the configuration of the upper mold 41 according to this embodiment is almost the same as the configuration of the upper mold described above. However, when the upper mold 41 is not used in a state where the upper mold 41 is removed from the guide sleeve or the like of the auto index mold holding device 3U (not shown in FIG. 2), the punch holder 15 is not used. In order to restrict relative rotation of the punch holder 15 and the retainer collar 29, a slip ring 39 is integrally provided on the upper surface of the flange 15F of the punch holder 15. The retainer collar 29 is fitted and supported on the slip ring 39 so as to be relatively rotatable. Since the slip ring 39 is integral with the punch holder 15, the slip ring 39 can be regarded as a part of the punch holder 15.

  A through hole 43 as an example of a concave portion in the vertical direction is formed at a predetermined position of the slip ring 39. In the through hole 43, there is provided a push-up pin 45 which penetrates the flange 15F of the punch holder 15 so as to be movable up and down and whose lower end portion can protrude downward from the flange 15F. When the lower end of the push-up pin 45 comes into contact with the upper surface of the inner flange 13F of the holder sleeve 13, the upper surface of the push-up pin 45 is substantially flush with the upper surface of the slip ring 39. .

  The retainer collar 29 is provided with a lock pin 47 that can be moved up and down by pushing down the push-up pin 45 and having a lower end portion engageable with the through hole 43. An urging means 53 such as a coil spring is mounted between the lock pin 47 and the set screw 51 screwed into the upper part of the insertion hole 49 into which the lock pin 47 is moved up and down. is there. That is, the lock pin 47 is always urged downward.

  With the above configuration, when the upper mold 41 is removed upward from the holder sleeve 13, the lower end portion of the lock pin 47 is in a state of being fitted in the through hole 43 by the action of the urging means 53. The push-up pin 45 is pushed down by the lock pin 47, and the lower end portion of the push-up pin 45 is in a state of projecting downward from the flange 15F in the punch holder 15.

  Therefore, when the upper mold 41 is detached from the holder sleeve 13 and the like, the punch holder 15 and the retainer collar 29 are in an integrated state without causing relative rotation. Therefore, the positional relationship between the keyway 15K provided in the punch holder 15 and the key 35 provided in the retainer collar 29 is always a fixed positional relationship. That is, when the key groove 15K of the punch holder 15 is positioned so as to match the key 5K provided on the guide sleeve 5, the key 35 provided on the retainer collar 29 is positioned at a position that matches the key groove 37 provided on the holder sleeve 13. It is to be positioned.

  Therefore, it is easy to mount the upper mold 41 on the holder sleeve 13 with the key groove 15K aligned with the key 5K and the key 35 aligned with the key groove 37. As described above, when the upper mold 41 is attached to the holder sleeve 13, the flange 15 </ b> F of the punch holder 15 is supported by the inner flange 13 of the holder sleeve 13.

  Therefore, the push-up pin 45 whose lower end protrudes downward is relatively pushed up. Therefore, the lock pin 47 is raised against the urging force of the urging means 53. The lower end of the lock pin 47 is held at a position substantially equal to the upper surface of the slip ring 39. Therefore, the rotation of the guide sleeve 5 can be transmitted to the punch holder 15 and the punch holder 15 can be rotated relative to the retainer collar 29.

  As can be understood from the above description, according to the present embodiment, the punch holder 15 and the retainer collar 29 do not rotate relative to each other when the upper mold 41 is detached from the holder sleeve 13. It is integrated with. Therefore, the positional relationship between the keyway 15 provided in the punch holder 15 and the key 35 provided in the retainer collar 29 can be always maintained in a fixed positional relationship. Therefore, the upper mold 41 can be attached and detached using the ATC.

  By the way, the present invention is not limited to the embodiment as described above, and can be implemented in other forms by making appropriate changes. That is, in the said embodiment, the upper surface of the said raising pin 45 and the lower surface of the lock pin 47 were illustrated as a plane. However, the upper surface of the push-up pin 45 can be formed into a shallow concave curved surface, and the lower surface of the lock pin 47 can be formed into a slightly protruding convex curved surface that can be engaged with and detached from the concave curved surface.

  With the above configuration, when the upper mold 41 is stored in a magazine or the like, the concave curved surface and the convex curved surface are in an engaged state. Therefore, it is possible to suppress rotation by a slight external force.

3U, 3L Auto index die holding device 5 Guide sleeve 5K Key 13 Holder sleeve 13F Inner flange 15 Punch holder 15F Flange 15K Key groove 25 Punch body 25K Key groove 27 Punch driver 29 Retainer collar 35 Key 37 Slit (Key groove)
39 Slip ring 41 Upper die 43 Through hole 45 Push-up pin 47 Lock pin 49 Insertion hole 51 Set screw 53 Biasing means (coil spring)

Claims (3)

  An upper die that can be attached to and detached from a rotary die holder having a structure in which the holder sleeve is only movable up and down at a position above the cylindrical guide sleeve rotatably supported by the upper die holder in the punch press. A plurality of punch tips arranged in a circular shape at the inner lower end of a cylindrical punch holder that is rotatably and vertically supported by an inner flange provided at the lower end of the holder sleeve, The punch body fitted with a holder is vertically movable and relatively rotatably fitted with a punching portion that can individually press each punch tip, and a flange provided at the upper end of the punch holder. A retainer collar that presses onto the inner flange of the holder sleeve is provided on the punch body so as to be movable up and down and urged downward, and is provided on the holder sleeve. The retainer collar includes a key that engages with a guide groove in a downward direction so as to be movable up and down, and a key groove in the vertical direction that engages with a key provided in the guide sleeve so as to be relatively movable up and down is provided in the punch holder. In order to maintain a fixed positional relationship between the key provided in the retainer collar and the key groove provided in the punch holder, a lock pin provided in the retainer collar so as to be movable up and down is engaged and disengaged. An upper die having a possible recess on the upper surface of the punch holder.   2. The upper mold according to claim 1, wherein a push-up pin that pushes up the lock pin when the flange of the punch holder is placed on the inner flange of the holder sleeve in the recess of the punch holder is moved up and down. An upper mold characterized by being freely provided.   A plurality of punch tips are arranged in a circular shape at the inner lower end of a cylindrical punch holder, and each punch is attached to the lower end of a punch body that is vertically movable and relatively rotatable in the punch holder. A key provided in the retainer collar, provided with a pressure-pressing portion capable of individually hitting a chip, a retainer collar that can be moved up and down on the punch body, and a biasing downward force to press the punch holder. The retainer collar can be engaged with a lock pin that can be moved up and down in order to keep the positional relationship between the key groove or the key provided in the punch holder in a constant positional relationship when not in use. An upper mold comprising a recess in the punch holder.

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