Punch quick-changing structure

Abstract

The utility model discloses a punch quick-change structure, which relates to the field of stamping dies and comprises an upper die plate, a spherical plunger positioned in the middle of the upper die plate, a punch quick-change bolt, a limit stop for limiting the pull-out position of the punch quick-change bolt, a punch, a pair of return springs on two sides of the punch and a stripper plate fixed below the upper die plate. The punch penetrates through the whole material returning plate and can penetrate in and out of the middle of the material returning plate. The punch quick-change bolt is L-shaped, and the front part of the punch quick-change bolt is of an inclined plane type; a groove a and a groove b are formed in the upper surface of the punch quick-change bolt, and the groove b is farther from the punch than the groove a; the lower part of the spherical plunger extends out of the lower surface of the upper template; when the punch stretches out, the spherical plunger is clamped into the groove b, and when the punch retracts, the spherical plunger is clamped into the groove a. According to the quick-change punch structure, the tedious operation of replacing the punch of the die can be effectively reduced, and meanwhile, the accuracy of the position of the quick-change punch is improved.

Description

Technical Field

[0001] The utility model relates to the field of stamping dies, in particular to a punch quick-change structure. Background Art

[0002] When designing stamping dies, we often encounter situations where two or more products are extremely similar, except for a few more or fewer holes. However, we cannot design several sets of dies for each product. Therefore, when designing the dies, we have to consider the structure of the punch quick-change. The traditional structure of changing the punch is to add a top screw structure on the punch. This method of changing the punch is more troublesome to operate, and the entire mold needs to be disassembled before replacement.

[0003] For example, the utility model patent with publication number CN 208466981 U discloses a quick-change punch structure, which includes an upper pad, a clamp, a stop plate and a stripper plate, the clamp, the stop plate and the stripper plate are provided with a punch hole, the punch is installed in the punch hole, a pad is provided on the clamp, a step is milled on the side of the clamp, and the side tapping buds are fixed to the clamp by screws, the upper end of the punch is in contact with the pad, the punch is raised by the pad, a clamp is provided on the clamp, the punch is clamped by the block, so that the punch cannot fall down, and an elastic element is provided at the lower end of the clamp, and the elastic element is provided on the outer surface of the clamp and the stopper plate. The punch structure realizes quick replacement of the punch through the cooperation of the pad and the clamp, under the action of the elastic element, but when changing the position of the punch, the punch structure needs to first loosen the screws fixed on the side tapping buds, and then remove the pad to complete, which is more troublesome. Utility Model Content

[0004] The utility model aims to provide a punch quick-change structure without disassembling a mold, so as to solve the problems mentioned in the background technology.

[0005] In order to achieve the above-mentioned purpose, the technical solution adopted is: a punch quick-change structure, including an upper template, a spherical plunger located in the middle of the upper template, a punch quick-change pin, a limit block for limiting the pull-out position of the punch quick-change pin, a punch, a pair of return springs on both sides of the punch, and a stripping plate fixed below the upper template, wherein the punch passes through the entire stripping plate and can pass in and out of the middle of the stripping plate; the punch quick-change pin is L-shaped, and the front part is a sloped type; the upper surface of the punch quick-change pin is provided with grooves a and grooves b, and groove b is farther away from the punch than groove a; the lower part of the spherical plunger extends out of the lower surface of the upper template; when the punch is extended, the spherical plunger is stuck in groove b; when the punch is retracted, the spherical plunger is stuck in groove a.

[0006] In a specific improvement, the punch is located in the middle of the stripping plate.

[0007] Specifically improved, the limit stopper is fixed on the outer side of the upper template.

[0008] Compared with the prior art, the beneficial effects of the utility model are:

[0009] The quick-change punch structure can effectively reduce the tedious disassembly and assembly operations of replacing the punch of the mold, and at the same time improve the accuracy of the position of the quick-change punch. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a structural comparison diagram of the punch extended state and the punch retracted state of the embodiment of the utility model.

[0011] In the figure: 1. upper template, 2. stripper plate, 3. spherical plunger, 4. groove a, 5. groove b, 6. limit stop, 7. punch quick change pin, 8. return spring, 9. punch. DETAILED DESCRIPTION

[0012] The present invention will be further explained and illustrated below in conjunction with the accompanying drawings and embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present invention.

[0013] Example: See Figure 1 A punch quick-change structure comprises an upper template 1, a spherical plunger 3 located in the middle of the upper template, a punch quick-change pin 7, a limit stopper 6 for limiting the pull-out position of the punch quick-change pin 7, a punch 9, a pair of return springs 8 on both sides of the punch 9, and a stripping plate 2 fixed below the upper template 1, wherein the punch 9 is located in the middle of the stripping plate 2 and runs through the entire stripping plate 2; the punch quick-change pin 7 is L-shaped, and the front part is a slope type; a groove a4 and a groove b5 are provided on the upper surface of the punch quick-change pin 7, and the groove b5 is farther away from the punch than the groove a4; the lower part of the spherical plunger 3 extends out of the lower surface of the upper template 1, and when the punch 9 extends out, the spherical plunger 3 is stuck in the groove b5; when the punch 9 retracts, the spherical plunger 3 is stuck in the groove a4; the limit stopper 6 is fixed on the outer side of the upper template 1.

[0014] Operation process: when the punch 9 is needed to work, push the punch quick-change latch 7 to the right, so that the groove b5 of the punch quick-change latch 7 is stuck by the spherical plunger 3, and the punch quick-change latch 7 uses the inclined surface at the front to push the punch 9 out of the stripping plate 2. When the punch 9 is not needed to work, pull the punch quick-change latch 7 to the left, so that the groove a4 of the punch quick-change latch 7 is stuck by the spherical plunger 3, and the punch 9 retracts into the stripping plate 2 under the action of the return spring 8.

[0015] The term "comprises" or any other variation thereof is intended to cover a non-exclusive inclusion such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not expressly listed or that are inherent to such process, method, article, or apparatus.

[0016] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary, but not restrictive, and the scope of the present invention is defined by the appended claims rather than the above explanations and descriptions, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention. At the same time, any figure mark in the claims should not be regarded as limiting the claims involved.

Claims

1. A punch quick-change structure, comprising an upper template (1), a spherical plunger (3) located in the middle of the upper template (1), a punch quick-change latch (7), a limit stopper (6) for limiting the pull-out position of the punch quick-change latch (7), a punch (9), and a stripper plate (2) fixed below the upper template (1), characterized in that: It also includes a pair of return springs (8) installed on both sides of the punch (9); the punch (9) passes through the entire stripper plate (2); the punch quick-change pin (7) is L-shaped, and the front part is a sloped type; the upper surface of the punch quick-change pin (7) is provided with a groove a (4) and a groove b (5), and the groove b (5) is farther away from the punch (9) than the groove a (4); the lower part of the spherical plunger (3) extends out of the lower surface of the upper template (1); when the punch (9) is extended, the spherical plunger (3) is stuck in the groove b (5); when the punch (9) is retracted, the spherical plunger (3) is stuck in the groove a (4).

2. A punch quick-change structure according to claim 1, characterized in that: The punch (9) is located in the middle of the stripping plate (2).

3. The punch quick-change structure according to claim 1, characterized in that: The limit stopper (6) is fixed on the outer side of the upper template (1).

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