Novel precise bending forming die structure

Abstract

The utility model discloses a novel precise bending forming die structure which comprises an upper die base, an upper padding plate, an upper clamping plate, a stripping back plate, a stripping plate, a lower die plate, a lower padding plate and a lower die base which are sequentially arranged from top to bottom, an upper bending punch is movably installed on the upper clamping plate, and a lower bending punch and a pressing block are installed on the lower die plate. The material pressing block is movably arranged up and down and located on the side edge of the lower bending punch, the upper portion of the upper bending punch is connected with an upper die material pressing assembly, and the lower portion of the material pressing block is connected with a lower die material pressing assembly. The precise bending forming die structure has the advantages that a traditional upward bending technology is changed, the upper die material pressing assembly is used for conducting primary bending on materials, then secondary finishing is conducted on bending through the force of a punching machine when the die is closed, the stability of the bending angle after bending can be effectively guaranteed, and the bending quality is improved. And it is guaranteed that the material at the bent position is completely yielded, then the precision and consistency of bent and formed products are guaranteed, and the product bending efficiency can be improved.

Description

Technical Field

[0001] This utility model relates to the field of mold technology, specifically a novel precision bending forming mold structure. Background Technology

[0002] Molds are specialized process equipment in modern manufacturing, needed directly or indirectly by all industries. As products are updated and upgraded, the requirements for product dimensions are becoming increasingly stringent; consequently, the requirements for molds are also increasing, forcing companies to develop new mold structures to produce products with higher precision and greater stability.

[0003] Insert molding terminals are widely used in automotive, electronics, and medical fields, where the bending angle requirements are extremely high. Bending of insert molding terminals is primarily processed using bending dies. Due to the thinness of the material and the stringent bending angle requirements, as well as the need for precise burr direction control, upward bending is generally employed. However, current conventional bending dies for this type of terminal exhibit relatively poor stability in upward bending structures, failing to fully utilize the stamping machine during the bending process and thus unable to meet increasingly demanding product requirements. Figure 1 As shown, a conventional upward bending forming die is used for bending. The upper punch is fixed to the stripper plate. After the stripper plate presses down on the material, the top block presses down on the lower part of the material to complete the bending forming. When bending is formed on the stripper plate, the force of the stamping machine cannot be used to perform a secondary finishing on the bent material. The stability of the bending angle after bending is relatively poor, which cannot meet the increasingly higher product requirements. Utility Model Content

[0004] The purpose of this invention is to provide a novel precision bending and forming mold structure to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a novel precision bending forming mold structure, comprising, from top to bottom, an upper mold base, an upper pad, an upper clamping plate, a stripping back plate, a stripping plate, a lower template, a lower pad, and a lower mold base. An upper bending punch is movably mounted on the upper clamping plate, and a lower bending punch and a pressure block are mounted on the lower template. The pressure block is movably arranged vertically and located on the side of the lower bending punch. An upper mold pressure assembly is connected above the upper bending punch, and a lower mold pressure assembly is connected below the pressure block.

[0006] Further preferably, the lower end of the upper bending punch is provided with a pressing part and a first bending part. The pressing part is horizontally arranged to press the material and perform subsequent downward bending. The first bending part is connected to one end of the pressing part. The first bending part is an inclined plane, which is used to avoid the material being bent and to cooperate with the lower bending punch to shape the bent part.

[0007] In a further preferred embodiment, the pressure block is positioned directly below the pressure section, and the side of the pressure block near the lower bending punch is aligned with the joint edge of the pressure section and the first bending section to ensure support for the bottom of the material and prevent displacement of the material during the bending process, thereby improving the bending quality; the lower bending punch is provided with a second bending section that cooperates with the first bending section for bending the material upward.

[0008] Further preferably, the upper die pressing assembly includes a first spring, which is installed inside the upper die base. A first pressure rod is connected below the first spring, and the lower end of the first pressure rod is connected to the middle of the upper end of the upper bending punch. The upper end of the first pressure rod is disposed inside the upper die base, and the lower end of the first pressure rod movably passes through the upper pad and the upper clamping plate. The first spring can provide a downward force to the first pressure rod, pressing the upper bending punch to achieve the first bending of the material. At the same time, the setting of the first spring ensures that the first punch can perform a secondary bending and shaping of the material under the action of the punch press.

[0009] Further preferably, the lower die pressing assembly includes a second spring, which is installed inside the lower die base. The upper end of the second spring is connected to a second pressure rod, the lower end of which is located inside the lower die base. The upper end of the second pressure rod movably passes through the lower pad and lower template, and is connected to the pressing block. The second spring provides an upward force to the second pressure rod, which in turn provides an upward force to the pressing block, ensuring that the pressing block always has an upward force, pressing against the lower surface of the material and holding the material in place, thus ensuring the stability of the material during the bending process.

[0010] In a further preferred embodiment, a limiting groove is provided at the lower end of the bending punch and on the side near the pressure block, and a limiting protrusion that matches the limiting groove is provided at the lower end of the pressure block. That is, the upward movement of the pressure block is limited by the limiting groove limiting the limiting protrusion.

[0011] Further preferably, a reset component is provided above the backing plate to provide a downward force to the backing plate and the stripping plate, so that the stripping plate can press down on the material and ensure the stability of the material during the bending process.

[0012] Further preferably, the reset assembly includes a third spring and a force transmission pin. The third spring is installed inside the upper mold base, and the upper end of the force transmission pin is connected to the third spring. The lower end of the force transmission pin passes through the upper pad and the upper clamping plate in sequence and is connected to the backing plate and the stripping plate. The third spring can provide a downward force to the force transmission pin, which can push the backing plate and the stripping plate downward to reset the backing plate and the stripping plate.

[0013] Beneficial Effects: This novel precision bending forming die structure provides a downward force to the upper bending punch through the upper die pressing assembly, allowing the material to be bent once before the die is fully closed. Then, when the die is fully closed, the punch provides a force to the upper bending punch through the upper die base, upper pad, and upper clamping plate, bending the material again after the first bend, achieving a secondary bending and shaping of the material. The lower die pressing assembly continuously provides an upward force to the pressing block, ensuring that the material remains between the pressing part of the upper bending punch and the pressing block during the bending process, thus ensuring the fixed position of the material during bending and guaranteeing the bending accuracy. This precision bending forming die structure changes the traditional upward bending process by using the upper die pressing assembly to bend the material once, and then using the force of the punch to perform a secondary finishing bend when the die is closed. This effectively ensures the stability of the bending angle after bending, ensures that the material at the bending point fully yields, thereby ensuring the accuracy and consistency of the bent product and improving the bending efficiency. Attached Figure Description

[0014] Figure 1 A schematic diagram of a conventional upward bending forming mold structure disclosed in the background art of this utility model;

[0015] Figure 2 A schematic diagram of the open state structure of the novel precision bending forming mold structure disclosed in the background art of this utility model;

[0016] Figure 3 for Figure 2 Enlarged structural diagram at point A;

[0017] Figure 4 A schematic diagram of the mold-closing state structure of the novel precision bending forming mold structure disclosed in the background art of this utility model;

[0018] Figure 5 for Figure 4 A magnified structural diagram at point B in the middle.

[0019] Reference numerals: 1-Upper mold base, 2-Upper pad, 3-Upper clamping plate, 4-Removal back plate, 5-Removal plate, 6-Lower template, 7-Lower pad, 8-Lower mold base, 9-Upper bending punch, 91-Pressure section, 92-First bending section, 10-Lower bending punch, 101-Second bending section, 102-Limiting groove, 11-Pressure block, 111-Limiting protrusion, 12-Upper mold pressure assembly, 1201-First spring, 1202-First pressure rod, 13-Lower mold pressure assembly, 1301-Second spring, 1302-Second pressure rod, 14-Reset assembly, 1401-Third spring, 1402-Force transmission pin, 15-Material. Detailed Implementation

[0020] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0021] like Figure 2-5 As shown, a novel precision bending forming die structure is used for bending and forming of thin material 15. It can perform secondary finishing on material 15, ensure the stability of the bending angle of the bent product, and improve the bending quality. The bending forming die structure includes, from top to bottom, an upper die base 1, an upper pad 2, an upper clamping plate 3, a stripping back plate 4, a stripping plate 5, a lower die template 6, a lower pad 7, and a lower die base 8. An upper bending punch 9 is movably mounted on the upper clamping plate 3, and a lower bending punch 10 and a pressure block 11 are mounted on the lower die template 6. The upper die base 1, upper pad 2, upper clamping plate 3, stripping back plate 4, stripping plate 5, and upper bending punch 9, along with other connected components, constitute the upper die structure. The lower die template 6, lower pad 7, lower die base 8, and lower bending punch 10, along with other connected components, constitute the lower die structure. The die is closed by the downward movement of the upper die structure. The bending of the material 15 is achieved by the combined action of the upper bending punch 9 and the lower bending punch 10. The pressure block 11 is used to support and position the product before the bending action. The pressure block 11 is movable up and down, facilitating its vertical movement. Before bending, it is higher than the lower bending punch 10, allowing it to contact the material 15 first, thus supporting and fixing the material and ensuring its position is fixed during bending. The pressure block 11 is located on the side of the lower bending punch 10, ensuring support for the material 15 during bending.

[0022] The upper bending punch 9 is connected to the upper die pressing assembly 12, which drives the upper bending punch 9 to move downward and perform the first bending of the material 15. The lower die pressing assembly 13 is connected to the lower part of the pressing block 11, which provides an upward force to the pressing block 11, ensuring that there is always an upward force on the pressing block 11, and can always provide a supporting force to the material 15. This presses the material 15 supported above the pressing block 11 against the lower part of the stripper plate 5, preventing the material 15 from moving before, during and after bending and before the mold is opened, thereby effectively ensuring the bending quality of the material 15. The upper die pressing assembly 12 drives the upper bending punch 9 to perform the first bending action on the material 15. As the upper die structure continues to move downward until the die is fully closed, the punch press applies another punching force to the upper bending punch 9, causing the upper bending punch 9 to press the already bent material again, performing a second bending action on the material 15, completing the second finishing action on the material 15, ensuring that the bending point of the material 15 is fully yielded, and ensuring the bending accuracy of the bent product.

[0023] In this application, the lower end of the upper bending punch 9 is provided with a pressing part 91 and a first bending part 92. The pressing part 91 is horizontally arranged and is used to press the surface of the material 15 and fix the material 15. The first bending part 92 is connected to one end of the pressing part 91. The first bending part 92 is an inclined plane and is used to cooperate with the lower bending head 10 to facilitate the bending and repositioning of the material 15. Through the continuous downward pressure of the pressing part 91 on the material 15, the part of the material 15 that is not pressed by the pressing part 91 is bent towards the direction of the first bending part 92 under the action of the lower bending punch 10 until it is pressed against the surface of the first bending part 92 by the lower bending punch 10.

[0024] Based on the above scheme, the pressure block 11 is located directly below the pressure part 91. The side of the pressure block 11 near the lower bending punch 10 is aligned with the joint edge of the pressure part 91 and the first bending part 92. That is, the pressure block 11 and the pressure part 91 are used to partially press the material 15, so that the lower bending punch 10 can bend the material 15. Specifically, this is achieved through the second bending section 101 provided on the lower bending punch 10. When the pressing section 91 and the pressing block 11 of the upper bending punch 9 press down a portion of the material 15, the portion pressed by the pressing section 91 remains stationary, while the portion above the lower bending punch 10 that is not pressed by the bending section 91 is bent upward by the second bending section 101 of the bending punch 10 under the pressure of the lower pressing section 91. The bending is performed with the junction of the pressing section 91 and the first bending section 92 as the bending point, until the material 15 of the bent portion is completely clamped between the first bending section 92 and the second bending section 101.

[0025] In this application, the upper die pressing assembly 12 includes a first spring 1201 and a first pressing rod 1202. The first spring 1201 is installed in the upper die base 1, and the upper end of the first spring 1201 is blocked by a plug. The first pressing rod 1202 is located at the lower end of the first spring 1201. The first spring 1201 provides a downward pressure to the first pressing rod 1202. The first pressing rod 1202 passes downward through the upper pad 2 and the upper clamping plate 3 and connects to the middle of the upper end of the upper bending punch 9, providing a downward pressure to the upper bending punch 9. As the upper die structure moves downward, it pushes the upper bending punch 9 downward through the stripper plate 5 and performs the first bending of the material 15.

[0026] In this application, the lower die pressing assembly 13 includes a second spring 1301 and a second pressing rod 1302. The second spring 1301 is installed in the lower die base 8 and its lower end is sealed by a plug. The second pressing rod 1302 is located at the upper end of the second spring 1301. The second spring 1301 provides an upward force to the second pressing rod 1302. The upper end of the second pressing rod 1302 passes through the lower pad 7 and is connected to the lower end of the pressing block 11, providing an upward force to the pressing block 11. This ensures that the pressing block 11 can always press the lower surface of the material 15, providing a supporting force and ensuring that the material 15 is in a fixed state before bending, during bending, and before the die is fully opened after bending, thus ensuring the bending quality.

[0027] In this application, a limiting groove 102 is provided at the lower end of the bending punch 10 and on the side near the pressure block 11. A limiting protrusion 111 is provided at the lower end of the pressure block 11. The limiting groove 102 is used to limit the rising height of the limiting protrusion 111, ensuring that the highest height of the upper end of the pressure block 11 is located at the set position, which can ensure effective support for the material 15.

[0028] In this application, a reset component 14 is provided above the stripper plate 4, which provides a downward force to the stripper plate 4 and the stripper plate 5. This facilitates the stripper plate 5 and the pressing part 91 of the upper bending punch 9 to press the upper surface of the material 15 together during the mold closing process, ensuring that the material 15 is fixed in position before bending, improving the bending quality, and also serving as a motion reset component for the stripper plate 4 and the stripper plate 5.

[0029] Based on the above scheme, the reset assembly 14 includes a third spring 1401 and a force transmission pin 1402. The third spring 1401 is installed in the upper mold base 1 and the upper end of the third spring 1401 is blocked by a plug. The force transmission pin 1402 is located below the third spring 1401. The third spring 1401 provides a downward force to the force transmission pin 1402. The force transmission pin 1402 passes downward through the upper pad plate 2 and the upper clamping plate 3 in sequence and is connected to the stripping back plate 4 and the stripping plate 5. When the mold starts to close, the stripping back plate 4 and the stripping plate 5 are subjected to a downward force from the reset assembly 14. There is a gap between the stripping back plate 4 and the upper clamping plate 3. The stripping plate 5 and the pressing part 91 of the upper bending punch 9 press the upper surface of the material 15 and fix the material 15 in conjunction with the pressing block 11. During the mold opening process, due to the elastic force of the third spring 1401, the back plate 4 and the upper clamping plate 3 are slowly separated, realizing the motion reset of the back plate 4 and the stripper plate 5.

[0030] In this application, the working process of the bending forming die structure is as follows: In the open state, the pressing part 91 of the upper bending punch 9 is flush with the lower surface of the stripper plate 5 under the action of the upper die pressing assembly 12. The material 15 moves to the top of the pressing block 11 under the action of the conveying mechanism. At this time, the pressing block 11 is higher than the top of the lower bending punch 10 under the action of the lower die pressing assembly 13. The die begins to close, the upper die structure moves downward under the action of the punch press, and then the pressing part 91 of the upper bending punch 9 and the stripper plate 5 press against the upper surface of the material 15 on the pressing block 11, and as the material 15 moves downward, the material 15 moves upward. The upper die structure moves downward together, and the part of the material 15 near the lower bending punch 9 is bent under the combined action of the pressing part 91 of the upper bending punch 9 and the second bending part 101 of the lower bending punch 9, that is, a first bending. As the die is fully closed, the upper bending punch 9 will be subjected to the punching force provided by the punch press to the upper die base 1, the upper pad 2 and the upper clamping plate 3, and will again apply a punching force to the bent material 15 located between the first bending part 92 and the second bending part 101, and perform a second bending on the bent material 15, and finally achieve the second bending finishing of the material 15.

[0031] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A novel precision bending forming die structure, comprising, from top to bottom, an upper die base (1), an upper pad plate (2), an upper clamping plate (3), a stripping back plate (4), a stripping plate (5), a lower die plate (6), a lower pad plate (7), and a lower die base (8), characterized in that: An upper bending punch (9) is movably mounted on the upper clamping plate (3), and a lower bending punch (10) and a pressure block (11) are mounted on the lower template (6). The pressure block (11) is movably arranged up and down and is located on the side of the lower bending punch (10). An upper die pressure assembly (12) is connected above the upper bending punch (9), and a lower die pressure assembly (13) is connected below the pressure block (11).

2. The novel precision bending forming die structure according to claim 1, characterized in that: The lower end of the upper bending punch (9) is provided with a pressing part (91) and a first bending part (92). The pressing part (91) is horizontally arranged, and the first bending part (92) is connected to one end of the pressing part (91). The first bending part (92) is an inclined plane.

3. The novel precision bending forming die structure according to claim 2, characterized in that: The pressing block (11) is located directly below the pressing part (91). The side of the pressing block (11) near the lower bending punch (10) is aligned with the joint edge of the pressing part (91) and the first bending part (92). The lower bending punch (10) is provided with a second bending part (101) that cooperates with the first bending part (92).

4. The novel precision bending forming die structure according to claim 1, characterized in that: The upper die pressing assembly (12) includes a first spring (1201), which is installed in the upper die base (1). A first pressure rod (1202) is connected below the first spring (1201). The lower end of the first pressure rod (1202) is connected to the middle of the upper end of the upper bending punch (9). The upper end of the first pressure rod (1202) is located in the upper die base (1), and the lower end of the first pressure rod (1202) is movably inserted into the upper pad (2) and the upper clamping plate (3).

5. The novel precision bending forming die structure according to claim 1, characterized in that: The lower die pressing assembly (13) includes a second spring (1301), which is installed in the lower die base (8). The upper end of the second spring (1301) is connected to a second pressing rod (1302). The lower end of the second pressing rod (1302) is located in the lower die base (8). The upper end of the second pressing rod (1302) is movably inserted into the lower pad (7) and the lower template (6). The upper end of the second pressing rod (1302) is connected to the pressing block (11).

6. The novel precision bending forming die structure according to claim 1, characterized in that: The lower end of the bending punch (10) and the side of the pressure block (11) are provided with a limiting groove (102), and the lower end of the pressure block (11) is provided with a limiting protrusion (111) that matches the limiting groove (102).

7. The novel precision bending forming die structure according to claim 1, characterized in that: A reset assembly (14) is provided above the backplate (4).

8. The novel precision bending forming die structure according to claim 7, characterized in that: The reset assembly (14) includes a third spring (1401) and a force transmission pin (1402). The third spring (1401) is installed in the upper mold base (1). The upper end of the force transmission pin (1402) is connected to the third spring (1401). The lower end of the force transmission pin (1402) passes through the upper pad (2) and the upper clamping plate (3) in sequence and is connected to the back plate (4) and the stripping plate (5).

Images