A piercing die

Abstract

The utility model relates to the field of punching die, concretely relates to a punching die, including punch holder and punch female die, the elastic rubber cover is sleeved on punch holder, the O type sealing ring is equipped on punch holder, and punch holder is detachably connected with punch punch through the O type sealing ring. Through the setting of O type sealing ring, punch holder is detachably connected with punch punch through O type sealing ring and forms temporary fixed relation. After completing punching, if punch punch is stuck on the plate, the end of punch punch is pulled out of the plate, so that punch punch extrudes O type sealing ring, so that O type sealing ring deforms, punch punch and punch holder are mutually loosened, punch punch is conveniently taken off from the plate, the situation that the force needed for punch punch to separate from the plate is greater than the elasticity of the elastic material reset is avoided because of the fixed connection of punch punch and punch holder, and the elasticity of the elastic material reset is limited, thereby improving the stripping effect of punch punch.

Description

Technical Field

[0001] This utility model relates to the field of punching dies, and specifically to a punching die. Background Technology

[0002] Punching dies are one of the most basic and widely used types in the stamping die family. They are precision tooling devices specifically designed to punch holes of specific shapes and sizes into sheet metal, strip, profiles, or other blanks. A punching die consists of a punch holder, a punch, and a punch die. The punch holder is typically connected to a hydraulic drive unit, the punch is attached to the punch holder, and the punch die and punch are located at opposite ends of the sheet metal to be punched. The punching die utilizes the relative movement between the punch and the punch die, under the action of strong punching force, to shear and separate the material, thereby efficiently and accurately obtaining the desired hole shape.

[0003] Due to issues such as numerous burrs at the punched holes in the sheet metal or the sheet metal springing back and shrinking after punching, the punching punch can easily get stuck on the sheet metal after punching. Existing technologies typically incorporate an elastic material in the punching punch to generate spring force after punching, facilitating the punching punch's detachment from the sheet metal. However, in existing technologies, the punching punch is usually fixedly connected to the punch holder, requiring it to detach from the punch holder together with the punching punch. The spring force generated by the elastic material's reset is limited, often resulting in a situation where the force required to detach the punching punch from the sheet metal exceeds the spring force generated by the elastic material's reset, leading to poor material removal efficiency. Utility Model Content

[0004] The technical solution adopted by this utility model to solve its technical problem is: to provide a punching die, comprising:

[0005] A punch holder is fitted with an elastic rubber sleeve and an O-ring. A punching punch is detachably connected to the punch holder via the O-ring. During punching, the elastic rubber sleeve presses against the plate.

[0006] A punching die, wherein the punching die is provided with a punching groove adapted to the punching punch.

[0007] Furthermore, the punch holder includes a first body, a second body, and a third body. The first body is connected to the output end of the hydraulic drive component. The diameter of the second body is larger than the diameter of the third body. A platform is formed between the second body and the third body. The elastic sleeve is fitted onto the third body and presses against the platform.

[0008] Furthermore, the elastic sleeve is provided with a through hole for the punch to pass through.

[0009] Furthermore, a limiting groove is provided on the wall of the through hole one, and the third main body is pressed against the bottom wall of the limiting groove.

[0010] Furthermore, the third body is provided with an annular protrusion, and the groove wall of the limiting groove is provided with an annular groove corresponding to the annular protrusion, and the annular protrusion is engaged in the annular groove.

[0011] Furthermore, the punch head is provided with an inner groove that is compatible with the O-ring seal.

[0012] The beneficial effects of this utility model are as follows: By setting the O-ring, the punch holder and the punching punch are detachably connected and temporarily fixed together. During punching, the elastic sleeve presses against the plate, and the hydraulic drive drives the punch holder to move the punching punch through the plate and into the punching die to complete the punching. If the punching punch is stuck on the plate, pull the end of the punching punch that is protruding from the plate, so that the punching punch squeezes the O-ring, causing the O-ring to deform. The punching punch and the punch holder are then released from each other, making it easy to remove the punching punch from the plate. This avoids the situation where the force required to remove the punching punch from the plate is greater than the elastic force provided by the elastic material in the prior art due to the fixed connection between the punching punch and the punch holder. This improves the stripping effect of the punching punch. Attached Figure Description

[0013] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0014] In the picture: Figure 1 This is an overall structural diagram of the punching die provided by this utility model;

[0015] Figure 2 for Figure 1 A cross-sectional view of the punching die shown;

[0016] Figure 3 for Figure 1 The exploded view of the punching die shown.

[0017] Explanation of reference numerals in the attached drawings: 10, punch seat; 11, elastic rubber sleeve; 111, through hole one; 112, limiting groove; 113, annular groove; 12, O-ring seal; 13, punching punch; 131, inner groove; 14, first body; 15, second body; 16, third body; 161, table surface; 162, annular protrusion; 17, mounting hole; 20, punching die; 21, punching groove; 200, sheet metal. Detailed Implementation

[0018] To make the technical problem to be solved, the technical solution, and the beneficial effects of this utility model clearer, the present utility model will now be described in detail with reference to the accompanying drawings. This drawing is a simplified schematic diagram, illustrating only the basic aspects of the present utility model, and therefore only shows the components relevant to the present utility model. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0019] Please refer to Figure 1 and Figure 2 This utility model provides a punching die, including a punch holder 10 and a punching die 20. An elastic sleeve 11 is fitted onto the punch holder 10, and an O-ring 12 is provided on the punch holder 10. A punching punch 13 is detachably connected to the punch holder 10 via the O-ring 12. During punching, the elastic sleeve 11 presses against the plate 200. The punching die 20 has a punching groove 21 that matches the punching punch 13. Furthermore, the punch holder 10 has a mounting hole 17 for mounting the punching punch 13, and the punching punch 13 has an inner groove 131 that matches the O-ring 12. The O-ring 12 is fitted into the inner groove 131 and contacts the wall of the mounting hole 17.

[0020] With the O-ring 12, the punch seat 10 and the punching punch 13 are detachably connected and form a temporary fixed relationship. During punching, the elastic sleeve 11 presses against the plate 200. The hydraulic drive drives the punch holder 10 to drive the punching punch 13 through the through hole 111 and then through the plate 200 into the punching groove 21 of the punching die 20 to complete the punching. If the punching punch 13 is stuck on the plate 200, pull the end of the punching punch 13 that is protruding from the plate 200, so that the punching punch 13 squeezes the O-ring 12, causing the O-ring 12 to deform. The punching punch 13 and the punch holder 10 are released from each other, making it easier to remove the punching punch 13 from the plate 200. This avoids the situation where the force required to remove the punching punch 13 from the plate 200 is greater than the elastic force brought by the elastic material reset due to the fixed connection between the punching punch 13 and the punch holder 10. This improves the stripping effect of the punching punch 13.

[0021] Meanwhile, the elastic sleeve 11 deforms under the pressure of the punch seat 10 during punching, and applies a reverse elastic force to the punch seat 10 when the punching is completed, which further facilitates the separation of the punch seat 10 and the punching punch 13 from each other.

[0022] For details, please refer to Figure 2 and Figure 3The punch holder 10 includes a first body 14, a second body 15, and a third body 16. The first body 14 is connected to the output end of the hydraulic drive component. The diameter of the second body 15 is larger than the diameter of the third body 16. A platform 161 is formed between the second body 15 and the third body 16. An elastic sleeve 11 is fitted onto the third body 16 and presses against the platform 161. Furthermore, the outer contours of the first body 14, the second body 15, and the third body 16 are all cylindrical structures.

[0023] During punching, the punching stroke of the punch seat 10 is limited by the cooperation of the table 161 and the elastic rubber sleeve 11 to avoid damage to the plate 200 due to excessive punching pressure of the punching punch 13.

[0024] Please refer to Figure 2 The elastic sleeve 11 has a through hole 111 for the punch 13 to pass through. The wall of the through hole 111 has a limiting groove 112, and the third body 16 presses against the bottom wall of the limiting groove 112. The third body 16 has an annular protrusion 162, and the wall of the limiting groove 112 has an annular groove 113 corresponding to the annular protrusion 162. The annular protrusion 162 is engaged in the annular groove 113.

[0025] By setting the limiting groove 112, the annular protrusion 162 and the annular groove 113, the punch seat 10 and the elastic sleeve 11 are relatively limited, and the elastic sleeve 11 is not easy to detach from the punch seat 10. At the same time, the punching stroke of the punch seat 10 is further limited to avoid damage to the plate 200 due to excessive punching pressure of the punching punch 13.

Claims

1. A punching die, characterized in that, include: A punch holder is fitted with an elastic rubber sleeve and an O-ring. A punching punch is detachably connected to the punch holder via the O-ring. During punching, the elastic rubber sleeve presses against the plate. A punching die, wherein the punching die is provided with a punching groove adapted to the punching punch.

2. The punching die according to claim 1, characterized in that: The punch holder includes a first body, a second body, and a third body. The first body is connected to the output end of the hydraulic drive component. The diameter of the second body is larger than the diameter of the third body. A platform is formed between the second body and the third body. The elastic sleeve is fitted onto the third body and presses against the platform.

3. The punching die according to claim 2, characterized in that: The elastic rubber sleeve is provided with a through hole for the punch to pass through.

4. The punching die according to claim 3, characterized in that: The through hole has a limiting groove on its wall, and the third body is pressed against the bottom wall of the limiting groove.

5. The punching die according to claim 4, characterized in that: The third body is provided with an annular protrusion, and the groove wall of the limiting groove is provided with an annular groove corresponding to the annular protrusion. The annular protrusion is engaged in the annular groove.

6. The punching die according to claim 1, characterized in that: The punch head is provided with an inner groove that is compatible with the O-ring seal.

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