JP3996268B2 - Method and apparatus for adjusting punch amount of punch mold - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a punch amount adjusting method and apparatus for a punch mold.
[0002]
[Prior art]
Conventionally, for example, a punch die 101 used for a punch press such as a turret punch press has a mounting hole for an upper die holder 103 (which corresponds to an upper turret in the case of a turret punch press) as shown in FIG. A cylindrical punch guide 107 fitted to 105 is movable up and down, and a center shaft 111 is fitted into a guide hole 109 provided substantially at the center in the radial direction of the punch guide 107 so as to be movable up and down. The punch guide 107 is supported by lifter springs 115 provided at a plurality of locations of the upper mold holder 103 with flange portions 113 provided at the top thereof.
[0003]
The punch guide 107 is provided with a shaft guide hole 117 substantially at the center in the upper radial direction, and a center shaft 111 is provided in the shaft guide hole 117 so as to be movable up and down. The center shaft 111 has a lower portion formed at a large diameter portion 119 and an upper portion formed at a small diameter portion 121, and a stepped portion 123 is provided between the large diameter portion 119 and the small diameter portion 121. A sleeve 125 that can slide up and down the narrow diameter portion 121 of the center shaft 111 is screwed to the upper end of the shaft guide hole 117 of the punch guide 107.
[0004]
A head nut 127 is screwed to the upper end portion of the center shaft 111, and a strip spring 131 having a stronger urging force than the lifter spring 115 is provided between the head nut 127 and the spring seat 129 of the sleeve 125. ing.
[0005]
The punch guide 107 is provided with a punch mounting hole 133 at substantially the center in the lower radial direction. The punch 135 is removably inserted into the punch mounting hole 133 and is chamfered on the upper side surface of the punch 135. The portion 137 is pressed and fixed by a punch fixing screw 139 provided on the side surface of the punch guide 107.
[0006]
An adjusting screw 143 is screwed into a screw hole penetrating vertically in the partition wall portion 141 between the punch mounting hole 133 and the shaft guide hole 117, and the upper end surface of the punch 135 can be pressed by the tip of the adjusting screw 143. It is configured. By rotating the adjusting screw 143, the protrusion amount S of the punch 135 from the lower end surface of the punch guide 107 is adjusted.
[0007]
[Problems to be solved by the invention]
By the way, the size of the punch, that is, the punch amount is determined by the protrusion amount S. If the punch protrusion amount S is large, a large punch can be formed according to the protrusion amount S when the punch force is sufficient. Even in the case of a steel plate, a hole may be formed in a thin plate, and the size appears remarkably in a plate material made of a soft material such as aluminum. In this case, the protrusion amount S of the punch 135 needs to be adjusted to be small so that the punch has a predetermined size.
[0008]
In order to adjust the punch amount of the conventional punch die 101, the punch fixing screw 139 is loosened and the sleeve 125 is turned to remove it from the punch guide 107 and the center shaft 111 is removed from the shaft guide hole 117 of the punch guide 107. . Next, a screw turning tool such as a screwdriver is inserted into the shaft guide hole 117, and the adjusting screw 143 is rotated by the screwdriver to adjust the protrusion amount S of the punch 135 from the lower end surface of the punch guide 107.
[0009]
Therefore, since the protrusion amount S cannot be adjusted when the conventional punch mold 101 is attached to the upper mold holder 103, it takes time to adjust the punch amount particularly when the thickness or material of the processed plate material changes. It was.
[0010]
The present invention has been made to solve the above-mentioned problems, and its purpose is to set a desired punch amount in accordance with changes in the material and thickness of the processed plate material with the punch mold mounted on the upper mold holder. It is an object of the present invention to provide a punch amount adjusting method and device for a punch mold that can be easily adjusted.
[0011]
[Means for Solving the Problems]
In order to achieve the above object, a punch amount adjusting method for a punch die according to the present invention according to claim 1 is characterized in that a punch body urged upward by a punch adjusting urging means in a punch guide is provided on the punch guide. A punch adjusting member provided on the upper end side so that the vertical position can be adjusted is restrained from upward biasing of the punch body, and by adjusting the vertical position of the punch adjusting member, the punch body is provided at the lower end of the punch body. The amount of protrusion of the punch with respect to the front end surface of the punch guide is adjusted.
[0012]
Accordingly, the punch body is moved up and down against the urging force of the punch adjusting urging means by the operation of the punch adjusting member, so that the punch at the lower end of the punch body is moved up and down to the front end surface of the punch guide. The amount of protrusion of the punch is adjusted to be large or small. Even when the punch mold is attached to the upper mold holder, the punch amount can be easily adjusted by simply adjusting the punch adjustment member according to the workpiece thickness, material and desired punch diameter. Is done.
[0013]
[Means for Solving the Problems]
According to a first aspect of the present invention, a punch adjusting biasing means is provided that provides a punch at the lower end of a punch body fitted in the punch guide so as to be movable up and down and biases the punch body upward with respect to the punch guide. A punch adjusting member that suppresses the upward biasing of the punch body is provided on the upper end side of the punch guide so that the vertical position can be freely adjusted, and the punch adjusting member is formed in an annular shape, The punch amount adjusting device of the punch mold is configured such that the lower end side is screwed to the punch guide and the upper end side protrudes upward from the upper end portion of the punch guide.
[0014]
Therefore, the punch body is moved up and down against the urging force of the punch adjusting urging means by the operation of the punch adjusting member, so that the punch at the lower end of the punch body is moved up and down. In order to be moved, the protrusion amount of the punch with respect to the front end surface of the punch guide is adjusted to be large or small. Even when the punch mold is attached to the upper mold holder, the punch amount can be easily adjusted by simply adjusting the punch adjustment member according to the workpiece thickness, material and desired punch diameter. Is done.
[0015]
According to a second aspect of the present invention, a punch is provided at the lower end of a punch body fitted in the punch guide so as to be movable up and down, and a guide member having a punch head at the upper end is moved up and down in a guide hole provided in the punch body. Strip urging means is provided for freely urging the guide member and the punch body in a direction away from each other, and the punch body is larger than the strip urging means upward with respect to the punch guide. Punch adjustment urging means for urging with an urging force is provided, and a punch adjusting member for suppressing upward urging of the punch body is provided on the upper end side of the punch guide so that the vertical position can be adjusted. The working member is formed in an annular shape, the lower end portion is screwed into the punch guide, and the upper end portion projects upward from the upper end portion of the punch guide. A punch die punches amount adjusting device that are.
[0016]
Accordingly, the punch body is moved up and down against the urging force of the punch adjusting urging means by the operation of the punch adjusting member, so that the punch at the lower end of the punch body is moved up and down to the front end surface of the punch guide. The amount of protrusion of the punch is adjusted to be large or small. Moreover, even when the punch mold is attached to the upper mold holder, the punch amount can be easily adjusted by simply adjusting the punch adjustment member according to the desired plate thickness, material and punch diameter. Adjusted to
[0017]
Furthermore, even if the punch head is further pressed after the punch head is pressed by the striker and the punch guide is further pressed after the tip surface of the punch guide comes into contact with the workpiece, the strip biasing means is the punch adjusting biasing means. The head nut and the guide shaft are lowered against the urging force of the strip urging means, but the punch body is not lowered. For this reason, the workpiece is pressed by a preset punch projection amount, so that a desired punching process is stably performed.
[0018]
According to a third aspect of the present invention, in the punch amount adjusting device for the punch mold according to the second or third aspect , the outer diameter of the punch body at an upper end portion is larger than that of other portions of the punch body. A spring seat is provided, and the punch adjusting biasing means is provided with an adjusting spring. When the adjusting spring comes into contact with the lower surface of the spring seat, the punch body is The punch adjustment member is biased upward, and the punch adjustment member is configured to suppress the upward biasing of the punch body by bringing the lower end into contact with the spring seat. Device.
[0019]
Accordingly, since the vertical position of the punch body can be easily adjusted by simply turning the punch adjusting member, the punch attached to the lower end of the punch body can be easily moved up and down to adjust the punch amount.
[0020]
DETAILED DESCRIPTION OF THE INVENTION
DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of a punch mold adjusting method and apparatus for a punch mold according to the present invention will be described below with reference to the drawings.
[0021]
Referring to FIG. 1, a punch die 1 according to the present embodiment is supported on an upper mold holder 3 mounted on an upper turret in a turret punch press (not shown), for example, so as to be movable up and down. The punch die 1 is mainly formed in a cylindrical punch guide 7 fitted in the mounting hole 5 of the upper die holder 3 so as to be movable up and down, and in a punch guide hole 9 provided at substantially the center in the radial direction of the punch guide 7. It is comprised from the punch body 11 inserted so that vertical movement was possible.
[0022]
More specifically, a flange portion 13 is provided on the upper portion of the punch guide 7, and the flange portion 13 is provided at a plurality of locations on the upper holder 3, as shown in FIG. 2 in this embodiment. Is supported by a lifter spring 15 provided in As shown in FIG. 1, the lifter spring 15 pushes up a support body 19 slidable up and down along a guide shaft 17 fixed to the upper part of the upper mold holder 3. The portion 13, that is, the punch guide 7 is configured to be biased upward.
[0023]
Further, a key groove 21 that is long in the vertical direction is provided on the outer periphery of the lower portion of the punch guide 7, and a key 23 that fits in the key groove 21 to restrict the vertical movement of the punch guide 7 is an upper mold holder. 3 is provided at the bottom.
[0024]
Further, the punch body 11 has, as guide holes, for example, a shaft guide hole 25 penetrating up and down substantially at the center in the radial direction of the punch body 11 and a stepped hole 27 having a larger diameter on the lower side of the shaft guide hole 25. Is provided.
[0025]
A punch support 29 is detachably mounted in the stepped hole 27 and fixed to the lower end portion of the punch body 11 with a screw 31. A punch mounting hole 33 is provided on the lower surface of the punch support 29. A punch 39 for punching the plate-like workpiece W in cooperation with the lower mold 37 (die) supported by the lower mold holder 35 is mounted in the punch mounting hole 33 of the punch support 29 and is fixed to the punch. 41 is fixed.
[0026]
Further, for example, a center shaft 43 as a guide member is provided in the shaft guide hole 25 at the upper part of the punch guide 7 so as to be movable up and down, and the lower end portion of the center shaft 43 is formed on the stepped surface 45 of the stepped hole 27. A flange portion 47 is provided which contacts and serves as an upper stopper. For example, a head nut 49 as a punch head is screwed to the upper end portion of the center shaft 43 and is fixed by a fixing screw 51 via a buffer material C.
[0027]
A spring seat 53 is provided at the upper end portion of the punch body 11. Between the upper end surface of the spring seat 53 and the spring seat 55 of the head nut 49, the head nut 49, the center shaft 43, For example, a strip spring 57 is provided as an example of a strip urging unit that urges the punch body 11 in a direction away from the punch body 11 relatively. In the present embodiment, the strip spring 57 is configured to have an urging force that is approximately three times as large as that of the above-described lifter spring 15. However, as long as the urging force is larger than that of the lifter spring 15, this is the limit. is not.
[0028]
Further, a punch amount adjusting screw hole 59 having a diameter larger than that of the punch guide hole 9 described above is provided in the upper portion of the punch guide 7, and the stepped surface 61 and the punch body 11 at the bottom of the punch amount adjusting screw hole 59 are provided. A punch adjusting biasing means for constantly biasing the punch body 11 upward with a larger biasing force against the downward biasing force of the punch body 11 by the strip spring 57. For example, an adjustment spring 63 is provided.
[0029]
An adjustment knob 65 as an example of a punch adjustment member that abuts on the upper surface of the spring seat 53 of the punch body 11 in order to suppress the upward biasing of the punch body 11 by the adjustment spring 63 in the screw hole 59 for adjusting the punch amount. Adjustably screwed.
[0030]
When the punching amount S of the punch 39 is large, if the punching force is sufficient, a large punch can be formed according to the protruding amount S. Therefore, even if the steel plate is a thin plate, a hole may be opened, and aluminum or the like is soft. The size of the plate material is prominent. In this case, the protrusion amount S of the punch 39 needs to be adjusted to be small so that the punch has a predetermined size.
[0031]
With the above configuration, when the adjustment knob 65 is turned in the tightening direction, the spring seat 53 of the punch body 11 is pushed downward against the urging force of the adjustment spring 63, so that the punch 39 at the lower end of the punch body 11 moves downward. Therefore, the protrusion amount S of the punch 39 with respect to the tip surface of the punch guide 7 is increased. On the other hand, when the adjustment knob 65 is turned in the loosening direction, the spring seat 53 of the punch body 11 is pushed upward by the urging force of the adjustment spring 63, so that the punch 39 at the lower end of the punch body 11 is moved upward. The protrusion amount S of the punch 39 with respect to the lower end surface of the guide 7 becomes small.
[0032]
Therefore, the protrusion amount S of the punch 39 can be adjusted by simply turning the adjusting knob 65 according to the material of the workpiece and the desired size of the diameter of the punch 39 even when the punch die 1 is attached to the upper die holder 3. Easy to adjust.
[0033]
In order to punch the workpiece, when the head nut 49 of the punch mold 1 is struck by the striker 67 that can move up and down as shown in FIG. 1, the urging force of the lifter spring 15 is applied to the strip spring 57 and the adjustment spring. Therefore, the punch guide 7 and the punch body 11 are integrally lowered against the urging force of the lifter spring 15, and the lower end surface of the punch guide 7 is the surface of the workpiece W placed on the lower die 37. The punch 39 is pressed by the workpiece W by the protrusion amount S, and punching is performed.
[0034]
Even if the head nut 49 is further pressed by the striker 67, the strip spring 57 is smaller than the biasing force of the adjustment spring 63, so that the head nut 49 and the center shaft 43 are lowered against the biasing force of the strip spring 57. However, the punch body 11 does not descend. Therefore, the punch 39 is pressed against the workpiece W by a preset protrusion amount S, and punching of a desired punch amount is stably performed.
[0035]
The present invention is not limited to the embodiment of the invention described above, and can be implemented in other modes by making appropriate changes.
[0036]
【The invention's effect】
As can be understood from the embodiments of the invention as described above, according to the invention of claim 1, the punch body is moved up and down against the biasing force of the punch adjusting biasing means by the punch adjusting member. Since the punch at the lower end of the punch body can be moved up and down, the protrusion amount of the punch with respect to the tip surface of the punch guide can be easily adjusted. Moreover, even when the punch mold is attached to the upper mold holder, the punch amount can be easily adjusted by simply adjusting the punch adjustment member according to the desired plate thickness, material and punch diameter. Can be adjusted.
[0037]
According to the invention of claim 2, the effect is the same as that of claim 1, and the punch body is moved up and down against the urging force of the punch adjusting urging means by the punch adjusting member. Since the punch at the lower end can be moved up and down, the amount of protrusion of the punch with respect to the tip surface of the punch guide can be easily adjusted. Moreover, even when the punch mold is attached to the upper mold holder, the punch amount can be easily adjusted by simply adjusting the punch adjustment member according to the desired plate thickness, material and punch diameter. Can be adjusted.
[0038]
According to the invention of claim 3, since the punch body is moved up and down against the urging force of the punch adjusting urging means by the punch adjusting member, the punch at the lower end of the punch body can be moved up and down. The amount of protrusion of the punch with respect to the tip surface of the can be easily adjusted. In addition, even when the punch mold is attached to the upper mold holder, the punch amount can be easily adjusted by simply adjusting the punch adjustment member according to the desired plate thickness, material and punch diameter. Can be adjusted.
[0039]
Furthermore, even if the punch head is further pressed after the punch head is pressed by the striker and the tip surface of the punch guide comes into contact with the workpiece and punching is performed, the strip biasing means is the punch adjusting biasing means. Since the head nut and the guide shaft are lowered against the biasing force of the strip biasing means, but the punch body does not fall, the desired punching process of the preset punch projection amount is stabilized. Can be done.
[0040]
According to the fourth aspect, since the vertical position of the punch body can be adjusted simply by turning the punch adjusting member, the punch at the lower end of the punch body can be easily moved up and down, and the punch amount can be adjusted easily.
[Brief description of the drawings]
FIG. 1 shows an embodiment of the present invention and is a front view including a cross section of a main part of a punch mold.
2 is a plan view of FIG. 1. FIG.
FIG. 3 is a front view including a cross-section of a main part of a conventional punch die.
[Explanation of symbols]
1 Punch Die 3 Upper Die Holder 7 Punch Guide 11 Punch Body 15 Lifter Spring 25 Shaft Guide Hole (Guide Hole)
27 Stepped hole 33 Punch mounting hole 37 Lower mold 39 Punch 43 Center shaft (guide member)
49 Head nut (punch head)
57 Strip spring (Strip biasing means)
59 Punch adjustment screw hole 63 Adjustment spring (punch adjustment biasing means)
65 Adjustment knob (Punch adjustment member)
67 striker

Claims (3)

A punch is provided at the lower end of the punch body fitted in the punch guide so as to be movable up and down, and punch adjusting biasing means for biasing the punch body upward with respect to the punch guide is provided.
A punch adjusting member that suppresses the upward biasing of the punch body is provided on the upper end side of the punch guide so that the vertical position can be adjusted.
The punch adjusting member is formed in an annular shape, the lower end side is screwed to the punch guide, and the upper end side protrudes above the upper end portion of the punch guide. Mold punch amount adjustment device. A punch is provided at the lower end of the punch body that is inserted in the punch guide to move up and down.
Strip energizing means for providing a guide member having a punch head at its upper end in a guide hole provided in the punch body so as to be movable up and down and for energizing the guide member and the punch body in a relatively separating direction. Provided,
A punch adjusting biasing means for biasing the punch body upward with respect to the punch guide with a biasing force larger than the strip biasing means;
A punch adjusting member that suppresses the upward biasing of the punch body is provided on the upper end side of the punch guide so that the vertical position can be adjusted.
The punch adjusting member is formed in an annular shape, the lower end portion is screwed into the punch guide, and the upper end portion protrudes upward from the upper end portion of the punch guide. Mold punch amount adjustment device. The punch amount adjusting device of the punch mold according to claim 1 or 2 ,
The upper end portion of the punch body is provided with a spring seat whose outer diameter is larger than other portions of the punch body,
The punch adjustment biasing means is configured to include an adjustment spring, and the punch body is biased upward by contacting the lower surface of the spring seat with the adjustment spring.
The punch adjustment member for a punch die, wherein the punch adjusting member is configured to suppress upward biasing of the punch body by abutting the lower end of the punch adjusting member against the spring seat.

Images