JP4132255B2 - Punch mold - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a punch die that is used for a punch press such as a turret punch press, for example, for performing a burring process on a workpiece.
[0002]
[Prior art]
Conventionally, as a punch mold 101 used for, for example, a turret punch press and performing burring (dubbing) on a workpiece, as shown in FIG. 4 and FIG. A holder 103 is provided, and a holder head 105 is integrated on top of the punch holder 103.
[0003]
The punch holder 103 is formed with an inverted U-shaped mounting hole 107, and a hole 109 communicating with the mounting hole 107 is formed so as to penetrate above the punch holder 103. 4 and 5, a key groove 111 is formed on the right side of the punch holder 103, and a holder key 113 is attached to the key groove 111 with a plurality of bolts 115.
[0004]
A punch height adjusting shim 117 is mounted in the mounting hole 107 formed in the punch holder 103 from below, and then a punch 119 is mounted. A pull bolt 121 is inserted into the hole 109 from above, and this pull bolt A lower male screw 121A 121 is screwed into a female screw 119A provided in an upper portion of a mounting hole 123 formed in the punch 119 in the vertical direction.
[0005]
An ejector 125, a spring 127, a rod 129, and a screw 131 are provided in the mounting hole 123 of the punch 119 in this order from below, and the screw 131 is fixed to the punch 119 with a screw 133. A key 137 attached to the punch 119 is inserted into the key groove 135 formed in the punch holder 103.
[0006]
In order to adjust the punch height from the upper end of the punch head 105 to the lower surface of the punch 119, a shim 117 is interposed above the punch 119 of the mounting hole 107.
[0007]
[Problems to be solved by the invention]
By the way, the above-described conventional punch die 101 is used by being mounted on, for example, an upper turret of a turret punch press. However, since there is variation in machine height, it is necessary to perform height adjustment for each machine and each plate thickness. Therefore, the height is adjusted by changing the thickness of the shim 117.
[0008]
Every time this height adjustment is performed, the punch mold 101 is taken out from the upper turret and the shim 117 is replaced, so that the height adjustment is difficult. Further, if the height is too large, there is a problem that the punch mold 101 is damaged.
[0009]
The object of the present invention is to provide a punching tool that can be used by any operator even if the machine is different, the thickness of the plate is varied, or the thickness of the plate varies, and any operator can adjust the punch height without adjusting the punch height. To provide a mold.
[0010]
[Means for Solving the Problems]
The present invention has been made in view of the above-described problems. In a punch mold in which a punch holder (3) is provided with a punch (9) that can be moved up and down, an apparatus hole (21) formed in the punch (9) is provided. ) And an ejector (37) for burring the workpiece (W) in cooperation with a die pin (65) provided in the die mold (55), and the ejector (37) is moved downward. An elastic body for urging the punch (9) downward between a holder head (17) attached to the top of the punch holder (3) and the punch (9). 13), and when the punch (9) moves against the urging force of the elastic body (13), the ejector (37) moves upward with respect to the punch (9) by the die pin (65). It is characterized by being configured to move to Is shall.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
[0015]
Referring to FIGS. 1 and 2, for example, a punch die 1 used for performing burring (dubbing) on a workpiece used in a turret punch press includes a punch holder 3 extending in the vertical direction. In the punch holder 3, a first hole 5 and a second hole 7 larger than the first hole 5 are formed so as to communicate in the vertical direction upward from the lower part.
[0016]
A punch 9 is mounted in the first hole 5, and a plurality of springs 13 as an elastic body are incorporated in the second hole 7 with a spacer 15 via a collar 11. A holder head 17 is detachably attached to the upper portion of the punch holder 3 with a plurality of bolts 19.
[0017]
A vertical mounting hole 21 is formed in the punch 9, and holes 23, 25, 27 communicating with the mounting hole 21 are formed in the collar 11, the spacer 15, and the holder head 17, respectively. An example pull bolt 29 as a fastening member is inserted from the formed hole 27, and the female screw 29 A of the pull bolt 29 is screwed into the female screw 9 A formed in the upper portion of the mounting hole 21 of the punch 9 through the holes 25 and 23. ing.
[0018]
A key groove 31 is formed on the right side of the holder head 17 and the punch holder 3 in FIGS. 1 and 2, and a key 33 is attached to the key groove 31 with a plurality of bolts 35. Further, the mounting hole 21 of the punch 9 is provided with an ejector 37, a spring 39 for urging the ejector 37 downward, a rod 41 and a screw 43 in order from below, and this screw 43 is fixed to the punch 9 with a screw 45. It has been. A key 49 attached to the punch 9 is inserted into the key groove 47 formed in the punch holder 3.
[0019]
As shown in FIG. 3, the punch holder 3 of the punch die 1 shown in FIG. 1 is mounted in the mounting hole 51H of the rotatable upper turret 51. A die mold 55 is mounted on a rotatable lower turret 53 corresponding to the upper turret 51. As this die mold 55, a die 57 is mounted on a lower turret 53, and an ejector plate 59 is urged upward by an urging force of a spring 61 and attached by a bolt 63 on the upper portion of the die 57. A die pin 65 is provided at a position corresponding to the ejector 37 of the ejector plate 59.
[0020]
With the above configuration, when the workpiece W to be processed is placed on the ejector plate 59 and the striker 67 is engaged with the head of the holder head 17 and the striker 67 is lowered, the punch holder 3 is lowered and the punch 9 is moved. It contacts the workpiece W. Next, when the striker 67 is further lowered, the ejector plate 59 descends against the urging force of the spring 61 and the workpiece W is subjected to burring (dubbing), that is, a small-diameter drawing, in cooperation with the die pin 65 and the ejector 37. Processing will be performed.
[0021]
At this time, the second hole 7 of the punch holder 3 is pre-pressurized by the spring 13 via the collar 11, so that the punch 9 is urged downward. Therefore, the punch 9 can move against the urging force of the spring 13, and the ejector 37 in the punch 9 is pressed and moved upward with respect to the punch 9 by the die pin 65 in the die die 55 . Therefore, it is possible to perform drawing with a small diameter without adjusting the punch height without adjusting the punch height with a conventional shim.
[0022]
Therefore, even if the machine is different (even if there is a variation in punch height), even if the plate thickness changes or there is a variation in plate thickness, any operator can easily attach the punch die 1 to the upper turret 51. It is not necessary to adjust the punch height as it is, and a small diameter drawing process can be performed.
[0023]
When replacing the punch 9, it is possible to replace the punch 9 easily by loosening the pull bolt 29 and removing the punch 9 from the pull bolt 29.
[0024]
In addition, this invention is not limited to embodiment of invention mentioned above, It can implement in another aspect by making an appropriate change.
[0025]
【The invention's effect】
As will be understood from the description of the embodiments of the invention as described above , according to the present invention, even if the machine changes, the plate thickness changes, the plate thickness varies, and any operator can It can be performed with the repulsive force of the elastic body without adjusting the height one by one, and the punch can be replaced simply by removing the punch from the fastening member.
[Brief description of the drawings]
FIG. 1 is a front sectional view of a punch mold according to the present invention.
FIG. 2 is a plan view of FIG.
FIG. 3 is a front cross-sectional view in which the punch die shown in FIG. 1 and a die die corresponding to the punch die are mounted on the upper and lower turrets.
FIG. 4 is a front sectional view of a conventional punch mold.
FIG. 5 is a plan view in FIG. 4;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Punch die 3 Punch holder 5 1st hole 7 2nd hole 9 Punch 11 Collar 13 Spring (elastic body)
15 Spacer 17 Holder head 29 Pull bolt (fastening member)

Claims (1)

In a punch mold in which a punch (9) is vertically movable in a punch holder (3), a die pin (65) provided in a die mold (55) is inserted into a device hole (21) formed in the punch (9). The ejector (37) that performs burring on the workpiece (W) is provided in a vertically movable manner, and the ejector (37) is urged downward and attached to the upper portion of the punch holder (3). An elastic body (13) for urging the punch (9) downward is provided between the holder head (17) and the punch (9), and resists the urging force of the elastic body (13). When the punch (9) moves, the ejector (37) is configured to move upward with respect to the punch (9) by the die pin (65) .

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