Punch and die for punching and overturning

Abstract

This utility model discloses an integrated punch and a mold having the integrated punch, belonging to the field of punching and forming technology. The integrated punch includes a punch body with a cylindrical structure. The top of the punch body has a punching section and a turning section formed sequentially. A negative angle cutting edge is formed at the junction of the top wall and the side wall of the punching section. The end of the side wall of the punching section is connected to the turning section through a transition surface to form an inclined turning surface extending upward. The top wall of the punching section has a raised pressing ball for pressing material. This utility model realizes that punching and turning are completed in one sequence, saving steps. Moreover, the coaxiality of punching and turning is high, which improves the product qualification rate and effectively saves production costs.

Description

Technical Field

[0001] This utility model relates to the field of punching and forming technology, and in particular to an integrated punch and a mold having the integrated punch. Background Technology

[0002] Currently, when processing parts, the stamping workshop needs to first stamp the sheet metal parts to form pre-drilled holes, and then perform a hole-flipping process on the pre-drilled holes. The stamping and hole-flipping processes are carried out separately. The above process has the following defects: it involves stamping and hole-flipping in separate sequences, resulting in many processes, complicated operations, and low production efficiency. Utility Model Content

[0003] The purpose of this utility model is to overcome the defects of the existing technology and provide an integrated punch and a mold with the integrated punch to solve the problem of multiple processes and complicated operation caused by separate punching and turning.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] This utility model discloses an integrated punch for flipping, comprising:

[0006] The punch body has a cylindrical structure;

[0007] The punch body has a punching section and a turning section formed sequentially at its top. A negative angle cutting edge is formed at the junction of the top wall and side wall of the punching section. The end of the side wall of the punching section is connected to the turning section through a transition surface, forming an inclined turning surface that extends upwards. The top wall of the punching section has a raised pressing ball for pressing material.

[0008] Furthermore, the angle α between the sidewall of the punching section and the central axis of the punch body is not less than 3°.

[0009] Furthermore, the transition surface is an inclined surface that extends upward from the punching section.

[0010] Furthermore, the pressing ball head is constructed as a sphere less than half a circle.

[0011] Furthermore, the diameter of the pressing ball head is

[0012] This utility model discloses a mold, comprising: an upper mold body, a lower mold body, and the aforementioned integrated punch.

[0013] The upper mold body is fixedly connected to the integrated punch, and the lower mold body is fixedly connected to the blanking channel with a punching die coaxial with the integrated punch. A mating surface is formed between the blanking hole sidewall and the top wall of the punching die to cooperate with the flipping inclined surface for flipping.

[0014] In the above technical solution, the integrated punch provided by this utility model has the following advantages:

[0015] This utility model designs an integrated punch and flipping punch, with a punching section and a flipping section on the punch body. During the punching process, firstly, the blank holder ball contacts the part to press the material, avoiding burrs caused by empty punching. Secondly, the negative angle cutting edge is used for punching, which can effectively reduce friction during the return stroke and avoid excessive heat generation. After punching is completed, the flipping inclined surface of the flipping section starts to work, realizing that punching and flipping are completed in one sequence. In addition, it also solves the problem of burrs caused by empty punching without blank holder, thus optimizing the production process, saving steps, ensuring the coaxiality of punching and flipping, improving the product qualification rate, and effectively saving production costs.

[0016] In the above technical solution, the mold provided by this utility model has the same beneficial effect as an integrated punch, which will not be described in detail here. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0018] Figure 1 This is a schematic diagram of the integrated punch structure disclosed in this utility model;

[0019] Figure 2 This is a schematic diagram of the mold structure disclosed in this utility model.

[0020] Explanation of reference numerals in the attached figures:

[0021] 1. Punch body; 2. Punching section; 3. Flanging section; 4. Negative angle cutting edge; 5. Transition surface; 6. Flanging bevel; 7. Pressure ball head;

[0022] 10. Upper mold body; 11. Lower mold body; 12. Punching die; 13. Mating surface; 14. Part. Detailed Implementation

[0023] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0024] See Figure 1 As shown;

[0025] A utility model discloses an integrated punch, comprising: a punch body 1;

[0026] The punch body 1 has a cylindrical structure. The top of the punch body 1 has a punching section 2 and a turning section 3 formed in sequence. It is used for the punching and turning process, that is, the punching and turning processes are completed in one punching action, thus optimizing the process route.

[0027] In this section, a negative angle cutting edge 4 is formed at the junction of the top wall and the side wall of the punching section 2. The negative angle cutting edge 4 is beneficial to reduce friction during the return stroke of the punch and avoid excessive heat generation. The end of the side wall of the punching section 2 is connected to the flipping section 3 via the transition surface 5, which is an inclined upward-extending flipping surface 6. The top wall of the punching section 2 is formed with a raised pressure ball head 7. During the punching process, the pressure ball head 9 first contacts the part 14 to play a pressing role and avoid burrs generated during punching.

[0028] Preferably, the angle α between the side wall of the punching section 2 and the central axis of the punch body 1 is not less than 3°.

[0029] Preferably, the transition surface 5 is an inclined surface that extends upward from the punching section 2, and the slope of the transition surface 5 is different from the slope of the turning surface 6.

[0030] Preferably, the pressing ball head 7 is constructed as a sphere less than half a circle; specifically, the diameter of the pressing ball head 7 is [missing information]. More specifically

[0031] See Figure 2 As shown:

[0032] A utility model discloses a mold, comprising: an upper mold body 10, a lower mold body 11, and the aforementioned integrated punch.

[0033] The upper mold body 10 is fixedly connected to an integrated punch, and the lower mold body 11 has a punching die 12 coaxial with the integrated punch in the blanking channel. A mating surface 13 is formed between the blanking hole side wall and the top wall of the punching die 12. The part 14 is extruded by the mating surface 12 and the turning inclined surface 6 to complete the turning.

[0034] In the above technical solution, the mold provided by this utility model has the following working principle:

[0035] During the stamping process, the blank holder 7 first contacts the part 14 to press the blank, thus avoiding burrs generated during punching. Then, the negative angle cutting edge 4 of the punch starts to work to punch. The negative angle cutting edge 4 reduces contact with the hole of the part 14 during the return stroke, resulting in low friction and effectively avoiding excessive heat generation. After the punching action is completed, the upper die body 10 continues to move downward, and the flipping slope 6 of the flipping section 3 of the punch starts to work, cooperating with the mating surface 13 on the punching die 12 to flip the hole, thereby realizing that punching and flipping are completed in one sequence.

[0036] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A punch with integrated overturning mechanism, comprising: The punch body (1) has a cylindrical structure, characterized in that: The punch body (1) has a punching section (2) and a turning section (3) formed sequentially at its top. A negative angle cutting edge (4) is formed at the junction of the top wall and the side wall of the punching section (2). The end of the side wall of the punching section (2) is connected to the turning section (3) through a transition surface (5) to form an inclined turning surface (6) extending upward. A pressing ball head (7) with a raised structure is formed on the top wall of the punching section (2) for pressing material.

2. The integrated punch head according to claim 1, characterized in that... ； The included angle α between the side wall of the punching section (2) and the central axis of the punch body (1) is not less than 3°.

3. The integrated punching head according to claim 1, characterized in that; The transition surface (5) is an inclined surface that extends upward from the punching section (2).

4. The integrated punching head according to claim 1, characterized in that... ； The pressing ball head (7) is constructed as a sphere less than half the diameter of a circle.

5. The integrated punching and flipping punch according to claim 4, characterized in that; The diameter of the pressing ball head (7) is 6. A mold, characterized in that, include: Upper mold body (10), lower mold body (11), and the integrated punch as described in any one of claims 1-5: The upper mold body (10) is fixedly connected to the punching and flipping integrated punch, and the lower mold body (11) is fixedly connected to the blanking channel with a punching die (12) coaxial with the punching and flipping integrated punch. A mating surface (13) is formed between the blanking hole side wall and the top wall of the punching die (12) to cooperate with the flipping inclined surface (6) for flipping.

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