JP2002321024A - Punch metal mold for punch press - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a punch metal mold wherein centering a punch edge can be easily performed relative to the datum plane of the punch. SOLUTION: A punch edge part 17 of a smaller diameter having a punch edge 17A is provided in the lower part of the punch body 9, and a constricted groove part 41 is provided in the vicinity of the bottom part of the punch edge part 17. An adjusting member stopper 43 is provided in the constricted groove part 41. An adjusting supporting member 47 having a hole part 45 is slidably inserted back and forth into the outside peripheral surface on the punch edge part 17. In the adjusting supporting member 47, an adjusting pressing member 51 is provided movably forward and backward for pushing into and out of contact with the adjusting member stopper 43 of the constricted groove part 41 in a hole part 45 from the outside peripheral surface. The adjusting pressing member 51 is provided with suitable spacing at plural positions toward the direction of the outside peripheral surface of the adjusting supporting member 47. The state of the run-out of the punch edge 17A is measured with the outside peripheral surface of the punch sliding part 15 being rotated as the datum plane. The adjusting member stopper 43 is pushed with the adjusting pressing member 51 placed at the location where the vibration approaches the maximum value, consequently the vibration is finely adjusted in terms of micrometer.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a punch die for a punch press, and more particularly, to a punch body provided to be able to move up and down inside a punch guide together with a punch guide to move a plate-like work between the punch guide lower surface and the punch body. The present invention relates to a punching die for a punch press, which is punched by the punch body and a die after being gripped by a die upper surface.

[0002]

2. Description of the Related Art Referring to FIG. 5, a punch die 101 for a punch press is mounted on, for example, an upper turret 103 as an upper die holder of a punch press, and a lower turret 105 as a lower die holder, for example. The workpiece W is punched in cooperation with the die 107 mounted on the workpiece W.

[0003] A punch die 101 is provided with a punch body 109.
Is provided so as to be vertically movable within the punch guide 111, and the punch body 109 is lowered together with the punch guide 111, and the plate-shaped work W is gripped between the lower surface of the punch guide 111 and the upper surface of the die 107. Later, the punch body 109 descends, and the punch edge 109A at the tip of the punch body 109 and the die edge 107 of the die 107 are moved.
The workpiece W is punched by A.

[0004] The die edge 107A of the die 107 is provided.
Of the punch edge 109A of the punch body 109 greatly affects the accuracy of the punching of the workpiece W by the above-described punching process.

[0005]

By the way, in the conventional punching process, the punch die 101 is used with the punch body 109 incorporated into the punch guide 111 while the punch cutting edge 109A is finished by machining. Therefore, there are the following problems.

(1) Since the centering accuracy of the punch tip 109A is determined by the machine accuracy of the machine tool performing the finishing and the centering skill of the operator, the skill of the operator and an expensive machine tool are required. Therefore, the cost is increased.

(2) The punch edge 10 once machined
Since the core accuracy of 9A cannot be corrected in units of microns, the accuracy of the product to be punched cannot be improved.

(3) Since there is no other way but to use the machine with the precision of the mechanical finishing process, even if the clearance accuracy is not good, it is used for the punching, so that the precision of the product to be punched is not good.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and has as its object to assemble a machined punch body with a punch guide with respect to a punch reference surface of a punch body when assembling the same with a punch guide. An object of the present invention is to provide a punch die for a punch press that can easily perform centering.

[0010]

In order to achieve the above object, a punch die for a punch press according to the present invention according to claim 1 is vertically movably fitted into a cylindrical punch guide via a punch sliding portion. In a punch die for a punch press, which is provided by urging the punch body upward, a small-diameter blade having a punch blade is provided at a lower portion of the punch body, and a root portion of the blade is provided. A constriction groove is provided in the vicinity and an adjustment member abutting portion is provided in the constriction groove, an adjustment support member having a hole fitted into the outer periphery of the cutting edge portion is provided, and the adjustment support member is provided from the outer peripheral surface of the adjustment support member. An adjusting pressing member for pressing and separating the adjusting member abutting portion of the constricted groove portion in the hole is provided on the adjusting supporting member so as to be able to advance and retreat, and the adjusting pressing member is directed to the outer peripheral direction of the adjusting supporting member. And it is characterized in that formed by providing a plurality of locations via the appropriate intervals.

Therefore, the run-out state of the punch blade edge of the punch body is measured by using a measuring instrument by rotating the outer peripheral surface of the punch sliding portion as a centering reference surface. After all the adjusting pressing members of the adjusting support member are lightly butted against the adjusting member abutting portion of the constricted groove portion, the adjusting member abutting portion is adjusted by the adjusting pressing member corresponding to the position of the position of the maximum value of the runout. By being pressed, the deflection of the punch blade tip is easily finely adjusted in micron units.

According to a second aspect of the present invention, there is provided a punch die for a punch press according to the first aspect of the present invention, wherein the adjusting support member is provided on the adjusting support member from the outer peripheral surface of the adjusting support member. A plurality of adjusting screw holes penetrating toward the hole are provided, and the adjusting pressing member is an adjusting screw screwed into the adjusting screw hole.

Therefore, fine rotation of the punch tip can be easily finely adjusted only by turning the small adjustment screw.

According to a third aspect of the present invention, there is provided a punch die for a punch press according to the first or second aspect, wherein the constricted groove portion is provided over the entire circumference of the cutting edge portion. The adjustment member abutment portion is formed of a tapered surface.

Therefore, since the constricted groove is provided over the entire circumference of the cutting edge, the adjusting support member can be easily adjusted so that the position of the maximum value of the runout and the position of any of the adjusting pressing members are aligned. By rotating the blade and moving the adjustment pressing member forward, the misalignment of the cutting edge can be efficiently corrected.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a punch die for a punch press according to the present invention will be described below with reference to the drawings.

Referring to FIG. 1, a punch die 1 according to the present embodiment is supported on an upper die holder 3 such as an upper turret in a turret punch press (not shown) so as to be vertically movable. The punch die 1 mainly slides in the punch mounting hole 5 of the upper die holder 3 and is fitted in a vertically movable manner. And a punch body 9 fitted therein.

More specifically, a flange 11 is provided above the punch guide 7, and the flange 11 is constantly urged upward by lifter springs 13 provided at a plurality of locations of the upper die holder 3. Supported in condition. Therefore, the entirety of the punch die 1 is
And is constantly levitated by a plurality of lifter springs 13.

The punch body 9 is provided with a punch sliding portion 15 which slides on the inner peripheral surface of the punch guide 7 at a substantially central portion thereof, and a small-diameter blade tip portion 17 is provided below the punch body 9. Provided. The cutting edge 17 is provided with a die mounting hole 21 provided in a lower mold holder 19 such as a lower turret.
The punching process is performed on the plate-shaped work W in cooperation with the die 23 mounted and supported inside.

A punch driver 25 is provided above the punch body 9.
Protrudes above the punch guide 7, and has an outer peripheral portion of the punch driver 25 provided with, for example, a tapered boss portion 27 as a punch head and a half-slit slit (not shown) in the radial direction. A head nut 29 is screwed. In addition, the slit is, for example, a head nut 2
9 is formed in a direction in which the screw hole 31 at the center is vertically divided.

A ring-shaped spring seat 33 is fitted around the outer periphery of the boss 27 of the head nut 29, and a ring-shaped spring seat 35 with a flange is mounted on the upper part of the punch guide 7. A strong stripper spring 37 is compressed and elastically mounted between the spring seat 33 and the flange of the spring seat 35. The punch driver 25 is slidable on the inner peripheral surface of the spring seat 35. Also, stripper spring 3
7 has a biasing force larger than the plurality of lifter springs 13 described above.

Therefore, the action of the stripper spring 37 for forcibly fitting the spring seat 33 to the boss portion 27 of the head nut 29 tends to narrow the width of the slit of the head nut 29.
The screw portion of the screw hole 31 is to tighten the screw portion of the punch driver 25. That is, the screw portion of the head nut 29 is configured to prevent loosening.

The die 23 is provided with a die edge 23A, and the punch edge 17A provided at the tip of the edge portion 17 of the punch body 9 with respect to the die edge 23A.
A is formed so as to be inserted through a predetermined clearance.

With the above configuration, after positioning the plate-shaped work W between the punch die 1 and the die die 23, the striker 39 presses the head nut 29 as the punch head of the punch die 1. Then, since the biasing force of the lifter spring 13 is weaker than the stripper spring 37, the punch body 9 and the punch guide 7 are both lowered so that the lower surface of the punch guide 7 sandwiches the work W between the upper surface of the die 23. Touch When the head nut 29 is further lowered by the striker 39 against the urging force of the stripper spring 37, the punch blade tip 17 A at the tip of the blade tip 17 of the punch body 9 and the die blade tip 23 of the die 23.
The workpiece W is stamped with A.

The clearance between the die edge 23A of the die 23 and the punch edge 17A of the punch body 9 has a great effect on the accuracy of punching the workpiece W by the above-described punching process.

The adjustment structure of the punch blade tip 17A in the punch body 9 constituting the main part of the embodiment of the present invention will be described.

2 (A), 2 (B), and 2 (C), a narrow constricted groove 41 is formed all around the root of the small-diameter cutting edge 17 of the punch body 9. 2, the front end side of the constricted groove 41, that is, FIG.
In (A), for example, an adjusting screw butting surface 43 as an adjusting member butting portion is formed on the lower side. Further, for example, a ring-shaped adjustment ring 47 is provided as an adjustment support member having a hole 45 that can be inserted into the cutting edge portion 17, and the outer circumference of the adjustment ring 47 is appropriately formed over the entire circumference. A plurality of adjustment screw holes 49 arranged at intervals are provided so as to penetrate the inner peripheral surface of the hole 45, and each adjustment screw hole 49 is provided with, for example, an adjustment screw 51 as an adjustment pressing member. Is screwed. In the present embodiment, the plurality of adjusting screw holes 49 are provided at four positions as shown in FIG. 2C, but the number is not particularly limited, but at least three or more. Yes, adjustment ring 4
7 are desirably arranged substantially evenly in the outer peripheral direction.

Note that the adjustment ring 47 is
In FIG. 2 (B), a chamfered portion 53 is formed near the upper edge so as not to abut against the root of the cutting edge portion 17, and the lower side of the hole 45 in FIG. The adjusting screw 5 is formed at a position where the upper end surface of the adjusting ring 47 abuts against the lower end surface of the punch sliding portion 15.
1 is configured to be able to contact and press the adjusting screw abutting surface 43 of the constricted groove 41.

With the above configuration, the outer peripheral surface of the punch sliding portion 15 of the punch body 9 serves as a reference plane for centering. After the outer peripheral surface of the punch sliding portion 15 is placed on, for example, a V block on the surface plate, the punch body 9 is rotated in the direction of the arrow as shown in FIG.
The run-out state of A is measured using a measuring instrument such as a dial gauge 55.

As shown by the two-dot chain line in FIG. 4, when a runout is observed at the punch tip 17A, the runout is corrected by combining the plurality of adjusting screws 51, and the direction in which the correction is desired. Fine-tune freely.

For example, as described above, the dial gauge 55
After the center run-out state of the punch blade tip 17A is measured at,
The adjusting ring 47 is rotated so that the position of the maximum value of the runout and the position of the adjusting screw 51 of one of the adjusting rings 47 are aligned. After lightly tightening all the adjustment screws 51, the adjustment screw abutment surface 43 of the constricted groove portion 41 is pressed by the tip of the adjustment screw 51 by additionally tightening the adjustment screw 51 at the position where the center runout is the maximum. The punch tip 17A is fine-adjusted in the direction of the arrow in FIG. 4 and corrected to a solid centered state. The run-out of the punch blade tip 17A can be changed in micron units. If the correction cannot be performed by retightening one adjustment screw 51, the correction direction can be changed by retightening the other adjustment screw 51.

As described above, in the punch body 9, even if the punch sliding portion 15 and the cutting edge portion 17 remain in an integrated structure,
The deflection center of the punch tip 17A can be easily corrected, and the correction direction can be freely set to any direction. Fine adjustment can be easily performed only by turning the small adjustment screw 51. In addition, the constricted groove 41 of the blade tip 17 and the
7 does not require any particular precision, and the adjustment ring 4
Since the structure is simple due to the combination of the adjusting screw 7 and the adjusting screw 51, the cost is low.

The present invention is not limited to the above-described embodiment, but can be embodied in other modes by making appropriate changes.

[0034]

As will be understood from the above description of the embodiments of the invention, according to the first aspect of the present invention, the outer peripheral surface of the punch sliding portion of the punch body is rotated as a centering reference surface. By using the measuring instrument, the run-out state of the punch blade tip of the blade tip can be measured. After lightly abutting all the adjusting pressing members of the adjusting support member against the adjusting member abutting portion of the constricted groove, the adjusting member abutting portion is pressed by the adjusting pressing member that matches the position of the maximum value of the runout. Therefore, it is possible to easily finely adjust the run-out of the punch tip in micron units.

Therefore, even if the punch sliding portion and the cutting edge of the punch body remain in an integrated structure, the punch cutting edge can be easily and freely corrected in any direction. In addition, precision is not particularly required for manufacturing the constricted groove portion of the blade edge portion and the adjusting support member, and the cost can be reduced because the structure is simple due to the combination of the adjusting support member and the adjusting pressing member.

According to the second aspect of the present invention, fine rotation of the punch tip can be easily finely adjusted only by turning the small adjustment screw.

According to the third aspect of the present invention, since the constricted groove and the adjusting member abutment are provided over the entire circumference of the cutting edge, the position of the maximum value of the deflection and the position of any of the adjusting pressing members are provided. The adjusting support member can be easily rotated so as to fit, and the adjusting pressing member is advanced, so that the misalignment of the cutting edge can be efficiently corrected.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a punch die and a die of a punch press according to an embodiment of the present invention.

FIG. 2 is an exploded view of a punch body according to the embodiment of the present invention, wherein (A) is a front view of the punch body, (B) is a front view of an adjustment ring and an adjustment screw, and (C) is a plane of the adjustment ring. FIG.

FIG. 3 is a state explanatory view for measuring a run-out state of a punch blade edge of a punch body according to the embodiment of the present invention.

FIG. 4 is an explanatory diagram of a centering state of a punch blade tip in FIG. 3;

FIG. 5 is an explanatory diagram of a state of punching using a conventional punch die and a die.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Punch die 3 Upper die holder 7 Punch guide 9 Punch body 15 Punch sliding part 17 Blade tip 17A Punch tip 41 Constriction groove 43 Adjusting screw abutment surface (Adjustment member abutment) 45 Hole 47 Adjustment ring (For adjustment) (Supporting member) 49 Adjustment screw hole 51 Adjustment screw (Adjustment pressing member)

Continued on the front page F term (reference) 4E048 LA01 LA17 MA04

Claims (3)

[Claims] 1. A punch die for a punch press, comprising a punch body which is vertically movably fitted into a cylindrical punch guide via a punch sliding portion and is provided in an upward direction. A small-diameter blade having a punch blade is provided at a lower portion, a narrow groove is provided near a root of the blade, and an adjusting member abutting portion is provided in the narrow groove, and is fitted around an outer periphery of the blade. An adjusting support member having a hole to be provided is provided, and an adjusting pressing member for pressing and separating the adjusting member abutting portion of the constricted groove in the hole from the outer peripheral surface of the adjusting supporting member is used for the adjusting. A punch die for a punch press, wherein said punching die is provided on a supporting member so as to be able to advance and retreat, and said adjusting pressing member is provided at a plurality of positions at appropriate intervals toward an outer peripheral direction of said adjusting supporting member. 2. The adjusting support member is provided with a plurality of adjusting screw holes penetrating from the outer peripheral surface of the adjusting supporting member toward the hole, and the adjusting pressing member is provided in the adjusting screw hole. 2. The screw according to claim 1, wherein the adjusting screw is screwed.
A punch die for the punch press described. 3. The punch press according to claim 1, wherein the constricted groove portion is provided over the entire circumference of the blade edge portion, and the adjusting member abutment portion is formed of a tapered surface. Punch mold.