Anti-strain punch structure

Abstract

The utility model relates to the technical field of stamping dies, in particular to an anti-strain punch structure which comprises an upper die and a lower die, the lower portion of the upper die is connected with a discharging plate through an elastic assembly, and a punch extending to the lower portion of the upper die is fixedly installed in the upper die. Wherein a through hole for the punch to penetrate through is formed in the discharging plate, and the through hole in a traditional discharging plate is arranged to be a combination mode of a round hole and a conical hole, so that a space which is sequentially enlarged from top to bottom can be formed between the lower portion of the discharging plate and the punch. Therefore, when waste chips generated after punching are driven upwards, a separation space can be provided, so that the waste chips fall off from the outside of the punch, and the problems that due to the fact that the distance between a traditional through hole and the punch is small, soft chips generated during punching return to a through hole cavity of a discharging plate together, the soft chips are brought into the through hole cavity, the punch is damaged by pulling, and then breakage occurs can be solved. The structural design is simple and reasonable.

Description

Technical Field

[0001] The utility model relates to the technical field of stamping dies, in particular to a punch structure that prevents strain. Background Art

[0002] A stamping die is a tool used for processing metal sheets, which can process metal sheets into parts of the desired shape. A stamping die usually consists of an upper die seat, a lower die seat, a die bottom plate, guide pins, guide sleeves, springs, etc. When in use, place the metal sheet on the lower die seat, then press the upper die seat down to make it fit with the lower die seat, thereby stamping the metal sheet into parts of the desired shape.

[0003] At present, in order to prevent the material from sticking after the punch is punched, a stripper plate is generally connected to the bottom of the upper die through an elastic telescopic structure, and the stripper plate separates the punch and the product, such as a stamping die disclosed in Chinese patent publication number "CN104002334A". The stamping die includes: an upper die seat, on which a stop pin is provided; a punch fixing plate, which is arranged on the lower surface of the upper die seat; a punch, which is arranged on the punch fixing plate; and a stripper screw, which passes through the punch fixing plate.

[0004] However, due to traditional punching, the oil on the side of the punch sticks to the product, and the shavings produced by punching are returned to the unloading plate cavity. The gap between the punch and the unloading plate cavity is very small, generally only 0.01MM. Once the shavings are brought in, they will tear the punch and then break, causing damage to the mold and reducing production efficiency. Utility Model Content

[0005] The utility model aims to solve the above-mentioned shortcomings in the prior art and proposes a punch structure to prevent strain.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A strain-proof punch structure is designed, comprising an upper die and a lower die, a stripper plate is connected to the lower portion of the upper die through an elastic component, and a punch extending to the lower portion of the upper die is fixedly installed inside the upper die;

[0008] There is a through hole for the punch to pass through inside the stripping plate, and the through hole includes a circular hole and a conical hole connected below the circular hole, and the diameter of the conical hole increases successively from the upper surface to the lower surface of the stripping plate.

[0009] Furthermore, a protective component is provided in the tapered hole, and at least a portion of the protective component is in contact with the bottom of the punch.

[0010] Furthermore, the protective component includes an inner conical tube, and a boss is fixedly installed on the inner side of the inner conical tube, wherein the inner side surface of the boss is in contact with the outer surface of the punch.

[0011] Furthermore, the boss is an elastic body, and a sloped portion is provided on the top of the boss.

[0012] Furthermore, an annular groove is provided on the top of the boss, and an adhesive layer is fixedly installed inside the annular groove, and the adhesive layer is used to absorb waste chips.

[0013] Furthermore, a connecting ring is fixedly connected to the outer side of the inner conical tube, and the connecting ring is threadedly connected to the conical hole.

[0014] Furthermore, the punch has a retracted portion below, and in the initial position, the retracted portion is located at the connection point between the circular hole and the tapered hole.

[0015] The utility model proposes an anti-strain punch structure, which has the beneficial effect that: in the utility model, the through hole on the traditional unloading plate is set as a combination of a circular hole and a tapered hole, so that a space that increases from top to bottom can be formed between the bottom of the unloading plate and the punch, so that when the waste chips after punching are driven upward, a separation space can be provided to make the waste chips fall from the outside of the punch, so as to avoid the problem that the waste chips generated by punching are returned to the through hole cavity of the unloading plate due to the small distance between the traditional through hole and the punch, and the waste chips will be pulled and then broken after being brought in. The structural design is simple and reasonable, which improves production efficiency and product quality, and at the same time reduces the scrap rate and saves costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the utility model;

[0017] Figure 2 It is a schematic diagram of the inner cone tube structure of the utility model.

[0018] In the figure: 1. upper die; 2. lower die; 3. stripper plate; 31. round hole; 32. tapered hole; 4. punch; 41. retracted portion; 5. protective component; 51. inner tapered tube; 52. boss; 53. inclined portion; 54. adhesive layer; 55. connecting ring; 6. product. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0020] Reference Figure 1-2An embodiment of the utility model discloses an anti-strain punch structure, which includes an upper die 1 and a lower die 2. A stripper plate 3 is connected to the lower portion of the upper die 1 through an elastic component. Specifically, the elastic component in this embodiment is configured as a guide rod and a spring, which is a conventional method in the prior art and will not be described in detail herein. A punch 4 extending to the lower portion of the upper die 1 is fixedly installed inside the upper die 1.

[0021] There is a through hole for the punch 4 to pass through inside the stripper plate 3, and the through hole includes a circular hole 31 and a conical hole 32 connected to the bottom of the circular hole 31, and the diameter of the conical hole 32 increases from the upper surface to the lower surface of the stripper plate 3.

[0022] That is to say, in this embodiment, the through hole on the traditional stripping plate 3 is set to a combination of a circular hole 31 and a conical hole 32, so that a space that increases from top to bottom can be formed between the bottom of the stripping plate 3 and the punch 4. In this way, when the waste chips after punching are driven upward, a separation space can be provided to allow the waste chips to fall from the outside of the punch 4. This can avoid the problem that the waste chips generated by punching are returned to the through hole cavity of the stripping plate 3 due to the small distance between the traditional through hole and the punch 4. After the waste chips are brought in, they will tear the punch 4 and then cause it to break. The structural design is simple and reasonable.

[0023] like Figure 1 As described above, the figure shows a schematic diagram of the structure of the product 6 during the stamping process.

[0024] In some embodiments, in the utility model, a protective component 5 is further provided in the conical hole 32 , and at least a portion of the protective component 5 is in contact with the bottom of the punch 4 . The provided protective component 5 can be used for preliminary cleaning of the punch 4 to prevent excessive hair debris from entering the interior of the conical hole 32 .

[0025] On the basis of the above-mentioned embodiments, the protective component 5 in the embodiment of the utility model includes an inner tapered tube 51, and a boss 52 is fixedly installed on the inner side of the inner tapered tube 51, wherein the inner side surface of the boss 52 is in contact with the outer surface of the punch 4, that is, when unloading, the outer wall of the punch 4 can be scraped by the provided protrusion 52 to achieve preliminary cleaning of the punch 4, while preventing excessive hair chips from entering the interior of the tapered hole 32.

[0026] Furthermore, in this embodiment, the boss 52 is an elastic body. Specifically, the elastic body in the utility model can be set as a rubber ring, which has a certain deformation ability to maintain a close fit with the punch 4. A sloped portion 53 is also provided on the top of the boss 52. The sloped portion 53 is used for contact guidance of the punch 4.

[0027] In addition, in order to collect the hair scraps entering the tapered hole 32, an annular groove is provided on the top of the boss 52 in the utility model, and a glue layer 54 is fixedly installed inside the annular groove, and the glue layer 54 is used to absorb the waste scraps.

[0028] Of course, the convenient disassembly of the inner cone tube 51 must also be considered to clean the hair collected inside or directly replace the inner cone scraper 51. In the utility model, the outer side of the inner cone tube 51 is fixedly connected with a connecting ring 55, and the connecting ring 55 is threadedly connected to the conical hole 32.

[0029] The punch 4 in the utility model is also provided with a retracted portion 41 below. In the initial position, the retracted portion 41 is located at the connection between the circular hole 31 and the conical hole 32. The design of the retracted portion 41 can further increase the distance between the punch 4 and the conical hole 32. At the same time, the retracted portion 41 is used for punching, and hair chips are accumulated on the retracted portion 41. Therefore, the hair chips can be completely in the conical hole 32 and will not move upward to the top of the punch 4, so as to further improve the stability of the work.

[0030] In summary, in the utility model, by opening a tapered hole 32 inside the unloading plate 3, the distance between it and the bottom of the punch 4 can be increased. Even if hair scraps are brought into the tapered hole 32, the punch 4 will not be pulled, which greatly improves the protection of the punch 4 and at the same time improves the stability and durability of the mold.

[0031] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A punch structure for preventing injury by pulling, comprising an upper die (1) and a lower die (2), characterized in that: A stripping plate (3) is connected to the lower part of the upper die (1) via an elastic component, and a punch (4) extending to the lower part of the upper die (1) is fixedly installed inside the upper die (1); There is a through hole inside the stripping plate (3) for the punch (4) to pass through, and the through hole includes a circular hole (31) and a conical hole (32) connected to the bottom of the circular hole (31), and the diameter of the conical hole (32) increases from the upper surface to the lower surface of the stripping plate (3).

2. The anti-strain punch structure according to claim 1, characterized in that: A protection component (5) is also arranged in the tapered hole (32), and at least a portion of the protection component (5) is in contact with the bottom of the punch (4).

3. The anti-strain punch structure according to claim 2, characterized in that: The protective component (5) comprises an inner conical tube (51), and a boss (52) is fixedly mounted on the inner side of the inner conical tube (51), wherein the inner side surface of the boss (52) contacts the outer surface of the punch (4).

4. The anti-strain punch structure according to claim 3, characterized in that: The boss (52) is an elastic body, and a sloped portion (53) is provided on the top of the boss (52).

5. The anti-strain punch structure according to claim 3, characterized in that: The top of the boss (52) is also provided with an annular groove, and a glue layer (54) is fixedly installed inside the annular groove, and the glue layer (54) is used to absorb waste chips.

6. An anti-strain punch structure according to any one of claims 3-5, characterized in that: A connecting ring (55) is fixedly connected to the outer side of the inner conical tube (51), and the connecting ring (55) is threadedly connected to the conical hole (32).

7. The anti-strain punch structure according to claim 6, characterized in that: The punch (4) also has a retracted portion (41) below it. In the initial position, the retracted portion (41) is located at the connection point between the circular hole (31) and the tapered hole (32).

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