Metal workpiece bending die

Abstract

The utility model discloses a metal workpiece bending die, which belongs to the field of bending dies and comprises a bottom die and a top die, a placing groove is arranged on the bottom die, and a bending groove is arranged in the placing groove on the bottom die. A through hole and an installation groove are formed in a bottom die, an ejection bending structure is arranged in the through hole, in the initial stage, the upper surface of an ejection block is flush with a containing groove, in the bending process, due to the effect of a reset spring, the ejection block is matched with a bending pressing rod to achieve the clamping effect on a metal plate, and then the bending stability is guaranteed; the ejector block is blocked and limited by the limiting column after descending, the normal bending effect is not affected, the reset spring can drive the ejector block to ascend when the die is opened after bending, so that the bent metal plate is pushed out, material taking is facilitated, the circular groove, the fixing column, the guide groove, the buffer plate and the buffer spring are arranged at the lower end of the positioning rod, and the positioning sleeve is matched for use, so that the positioning effect is improved. And the buffering effect can be achieved while positioning and guiding are achieved.

Description

Technical Field

[0001] This utility model relates to the field of bending dies, and in particular to a bending die for metal workpieces. Background Technology

[0002] Bending dies, typically referring to special dies used in bending machines, are tools used by bending machines to shape and process sheet metal. These dies, through a rationally designed structure, shape the blank into a part with a specific shape and size under the pressure of the bending machine. Bending dies are mostly used for bending metal workpieces. For bending sheet metal, the sheet metal is placed on the die, the bending machine is started, and the die closes to perform the bending operation.

[0003] In existing metal sheet bending dies, for V-bending, the sheet metal is placed on the bottom die, and the top die descends to bend the sheet metal using pressure bars. However, in existing bending dies, the contact area between the sheet metal and the bottom die is small during bending, resulting in ineffective sheet metal fixation and a tendency for slippage and displacement, which affects bending accuracy. Furthermore, the lack of an ejector structure on the bottom die after bending makes unloading the bent product extremely inconvenient. Additionally, the absence of a buffer structure during die closing leads to significant impact, resulting in greater wear and a shorter service life. Utility Model Content

[0004] The main purpose of this utility model is to provide a metal workpiece bending die, which can effectively solve the problems in the background art.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A metal workpiece bending die includes a bottom die and a top die. The bottom die has a placement groove and a bending groove in the placement groove. The bottom die has an ejection bending structure and a positioning sleeve. A bending pressure rod is fixed on the lower surface of the top die and is located above the bending groove. The top die has a positioning structure.

[0007] Preferably, the bottom mold has a through hole and a positioning groove in the through hole, the lower end of the bottom mold has an installation groove that is connected to the through hole, and the upper end of the through hole is connected to the bending groove.

[0008] Preferably, a metal plate is provided between the bending groove and the bending pressure rod, and the lower end of the positioning structure is connected to the positioning sleeve.

[0009] Preferably, the ejection bending structure includes a fixed plate, a limiting post, a first connecting block, an ejection block, a positioning strip, a V-groove, a second connecting block, and a return spring. The fixed plate is fixedly connected to the limiting post and is fixed in the mounting groove by screws. The limiting post is located in the through hole. The first connecting block is fixed on the fixed plate. The ejection block is fixedly connected to the positioning strip and is disposed in the through hole. The positioning strip slides into the positioning groove. The V-groove is formed on the ejection block. The second connecting block is fixed to the lower end of the ejection block. The return spring is connected to the first connecting block and the second connecting block.

[0010] Preferably, the positioning structure includes a positioning rod, a conical head, a circular groove, a fixed post, a guide groove, a buffer plate, a guide rod, and a buffer spring. The positioning rod is fixedly connected to the conical head. The circular groove is formed on the positioning rod and the conical head. The fixed post is fixed in the circular groove. The guide groove is formed inside the positioning rod. The buffer plate and the guide rod are fixedly connected, and the upper end of the guide rod passes through the fixed post and is connected to the guide groove. The buffer spring is sleeved on the guide rod, and the upper end of the buffer spring is connected to the fixed post.

[0011] Compared with the prior art, this utility model has the following beneficial effects: This metal workpiece bending die, by opening through holes and mounting grooves on the bottom die, and setting an ejector bending structure in the through holes, initially, the upper surface of the ejector block is flush with the placement groove. During the bending process, due to the action of the return spring, the ejector block, together with the bending pressure rod, clamps the metal plate, thereby ensuring the stability of the bending. At the same time, a V-shaped groove is set on the ejector block. After the ejector block descends, it is blocked and limited by the limiting post, which does not affect the normal bending effect. When the die is opened after bending, the return spring can bring the ejector block up again, thereby pushing out the bent metal plate for easy material removal. A circular groove, a fixing post, a guide groove, a buffer plate, and a buffer spring are set at the lower end of the positioning rod. In conjunction with the positioning sleeve, it can play a role in positioning and guiding, and at the same time play a buffering effect, reducing the impact force generated when the entire die is closed, and ensuring the integrity of the die. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of the present invention during mold closing;

[0013] Figure 2 This is a schematic diagram of the structure of the present invention during mold opening;

[0014] Figure 3 This is a schematic diagram of the ejector bending structure of this utility model;

[0015] Figure 4 This is a schematic diagram of the positioning structure of this utility model.

[0016] In the diagram: 1. Bottom mold; 2. Placement groove; 3. Bending groove; 4. Ejection bending structure; 401. Fixing plate; 402. Limiting post; 403. First connecting block; 404. Ejection block; 405. Positioning strip; 406. V-groove; 407. Second connecting block; 408. Return spring; 5. Positioning sleeve; 6. Top mold; 7. Bending pressure rod; 8. Positioning structure; 801. Positioning rod; 802. Conical head; 803. Circular groove; 804. Fixing post; 805. Guide groove; 806. Buffer plate; 807. Guide rod; 808. Buffer spring; 9. Metal plate; 10. Through hole; 11. Positioning groove; 12. Mounting groove. Detailed Implementation

[0017] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0018] like Figure 1-Figure 4 As shown, a metal workpiece bending die includes a bottom die 1 and a top die 6. The bottom die 1 is provided with a placement groove 2, and a bending groove 3 is provided in the placement groove 2. The bottom die 1 is provided with an ejector bending structure 4, and a positioning sleeve 5 is installed on the bottom die 1. A bending pressure rod 7 is fixed on the lower surface of the top die 6, and the bending pressure rod 7 is located above the bending groove 3. The top die 6 is provided with a positioning structure 8. The bottom die 1 is provided with a through hole 10, and a positioning groove 11 is provided in the through hole 10. The lower end of the bottom die 1 is provided with an installation groove 12, and the installation groove 12 is connected to the through hole 10. The upper end of the through hole 10 is connected to the bending groove 3. A metal plate 9 is provided between the bending groove 3 and the bending pressure rod 7. The lower end of the positioning structure 8 is connected to the positioning sleeve 5.

[0019] When bending metal sheets, the metal sheet 9 is placed in the placement groove 2 on the bottom mold 1. The upper end of the ejector bending structure 4 contacts the metal sheet 9. After starting the bending machine, the top mold 6 descends with the bending pressure rod 7. When the bending pressure rod 7 contacts the metal sheet 9, the metal sheet 9 is bent. During this process, the upper part of the ejector bending structure 4 contacts the metal sheet 9, which clamps and fixes the metal sheet 9 until the end of the metal sheet 9 is bent and fits the bending groove 3. This completes the bending of the metal sheet 9. During the entire bending process, the lower end of the positioning structure 8 is inserted into the positioning sleeve 5, which can play a positioning and guiding role. After the bending is completed, the top mold 6 rises with the bending pressure rod 7. Under the action of the ejector bending structure 4, the metal sheet 9 moves upward, which facilitates the subsequent quick material removal.

[0020] According to the above implementation scheme, the ejector bending structure 4 includes a fixed plate 401, a limiting post 402, a first connecting block 403, an ejector block 404, a positioning strip 405, a V-groove 406, a second connecting block 407, and a return spring 408. The fixed plate 401 is fixedly connected to the limiting post 402, and the fixed plate 401 is fixed in the mounting groove 12 by screws. The limiting post 402 is located in the through hole 10. The first connecting block 403 is fixed on the fixed plate 401. The ejector block 404 is fixedly connected to the positioning strip 405, and the ejector block 404 is disposed in the through hole 10. The positioning strip 405 slides in the positioning groove 11. The V-groove 406 is formed on the ejector block 404. The second connecting block 407 is fixed to the lower end of the ejector block 404. The return spring 408 is connected to the first connecting block 403 and the second connecting block 407. Through holes 10 and mounting grooves 12 are opened on the bottom mold 1. An ejection bending structure 4 is set in the through hole 10. In the initial stage, the upper surface of the ejector block 404 is flush with the placement groove 2. During the bending process, due to the action of the return spring 408, the ejector block 404, together with the bending pressure rod 7, plays a clamping role on the metal plate 9, thereby ensuring the stability of the bending. At the same time, a V-groove 406 is set on the ejector block 404. After the ejector block 404 descends, it is blocked and limited by the limiting post 402, which does not affect the normal bending effect. When the mold is opened after bending, the return spring 408 can bring the ejector block 404 up again, thereby pushing out the bent metal plate 9 for easy material removal.

[0021] When installing the ejector bending structure 4, connect the end of the return spring 408 to the first connecting block 403 and the second connecting block 407 respectively. Then, through the cooperation of the positioning strip 405 and the positioning groove 11, the ejector block 404 is set into the through hole 10 until the fixing plate 401 is set into the mounting groove 12. The fixing plate 401 is then fixed with screws. After the ejector bending structure 4 is installed, under the action of the return spring 408, the upper surface of the ejector block 404 is flush with the placement groove 2. During the bending process of the metal plate 9, as the bending pressure rod 7 descends, the end of the metal plate 9 deforms, and the ejector block 404... 04. The ejector block 404 then descends and compresses the return spring 408 until it contacts the limit post 402. Subsequently, the bending operation of the metal plate 9 is completed through the V-groove 406 and the bending groove 3. During the entire bending process, the ejector block 404 is in close contact with the metal plate 9 under the action of the return spring 408. It works in conjunction with the bending pressure rod 7 to clamp and fix the metal plate 9, ensuring the stability during bending. After bending, the bending pressure rod 7 rises with the top mold 6, and the return spring 408 extends, causing the ejector block 404 to rise, thereby raising the bent metal plate 9 for easy and quick material removal later.

[0022] According to the above implementation scheme, the positioning structure 8 includes a positioning rod 801, a conical head 802, a circular groove 803, a fixing post 804, a guide groove 805, a buffer plate 806, a guide rod 807, and a buffer spring 808. The positioning rod 801 is fixedly connected to the conical head 802. The circular groove 803 is formed on the positioning rod 801 and the conical head 802. The fixing post 804 is fixed in the circular groove 803. The guide groove 805 is formed in the positioning rod 801. The buffer plate 806 and the guide rod 807 are fixedly connected, and the guide rod 808... The upper end of 07 passes through the fixed post 804 and is connected to the guide groove 805. The buffer spring 808 is sleeved on the guide rod 807, and the upper end of the buffer spring 808 is connected to the fixed post 804. The lower end of the positioning rod 801 is provided with a circular groove 803, a fixed post 804, a guide groove 805, a buffer plate 806, and a buffer spring 808. It is used in conjunction with the positioning sleeve 5. While playing a positioning and guiding role, it can also play a buffering role, reducing the impact force generated when the entire mold is closed, and ensuring the integrity of the mold.

[0023] During the mold closing process, the buffer plate 806 at the lower end of the positioning rod 801 first enters the positioning sleeve 5. Under the action of the conical head 802, the positioning rod 801 is also inserted into the positioning sleeve 5. As the positioning rod 801 descends, the buffer plate 806 is blocked and limited. The guide rod 807 on the buffer plate 806 moves along the guide groove 805. The buffer spring 808 is compressed in the circular groove 803 to form a buffer, which can reduce the impact effect generated by the mold closing and ensure the integrity of the mold.

[0024] The foregoing describes the working principle, features, and beneficial effects of this utility model. Those skilled in the art will understand from the foregoing that it does not limit the utility model. The embodiments and description above illustrate the basic principles and features of this utility model. Various changes and improvements can be made to this utility model while remaining consistent with its concept, and all such improvements should fall within the scope of protection claimed by this utility model.

Claims

1. A metal workpiece bending die, comprising a bottom die (1) and a top die (6), wherein the bottom die (1) is provided with a placement groove (2), and the placement groove (2) on the bottom die (1) is provided with a bending groove (3), characterized in that: The bottom mold (1) is provided with an ejector bending structure (4), and a positioning sleeve (5) is installed on the bottom mold (1). A bending pressure rod (7) is fixed on the lower surface of the top mold (6), and the bending pressure rod (7) is located above the bending groove (3). The top mold (6) is provided with a positioning structure (8). The bottom mold (1) is provided with a through hole (10), and a positioning groove (11) is provided in the through hole (10). The lower end of the bottom mold (1) is provided with an installation groove (12), and the installation groove (12) is connected to the through hole (10). The upper end of the through hole (10) is connected to the bending groove (3). A metal plate is provided between the bending groove (3) and the bending pressure rod (7). 9), the lower end of the positioning structure (8) is connected to the positioning sleeve (5); the ejection bending structure (4) includes a fixing plate (401), a limiting post (402), a first connecting block (403), an ejection block (404), a positioning strip (405), a V-groove (406), a second connecting block (407), and a return spring (408). The fixing plate (401) is fixedly connected to the limiting post (402), and the fixing plate (401) is fixed in the mounting groove (12) by screws. The limiting post (402) is located in the through hole (10). The first connecting block (403) is fixed on the fixing plate (401). The ejection block (404) The positioning structure (8) is fixedly connected to the positioning strip (405), and the ejector block (404) is set in the through hole (10). The positioning strip (405) is slidably connected to the positioning groove (11). The V-shaped groove (406) is opened on the ejector block (404). The second connecting block (407) is fixed to the lower end of the ejector block (404). The reset spring (408) is connected to the first connecting block (403) and the second connecting block (407). The positioning structure (8) includes a positioning rod (801), a conical head (802), a circular groove (803), a fixed column (804), a guide groove (805), a buffer plate (806), and a guide rod (807). The positioning rod (801) is fixedly connected to the conical head (802), the circular groove (803) is opened on the positioning rod (801) and the conical head (802), the fixing post (804) is fixed in the circular groove (803), the guide groove (805) is opened in the positioning rod (801), the buffer plate (806) and the guide rod (807) are fixedly connected, and the upper end of the guide rod (807) passes through the fixing post (804) and is connected in the guide groove (805). The buffer spring (808) is sleeved on the guide rod (807), and the upper end of the buffer spring (808) is connected to the fixing post (804).

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