Material pressing force device and stamping die

Abstract

The utility model relates to the technical field of stamping dies, in particular to a material pressing force device and a stamping die, which comprise a lower backing plate, an upper backing plate, a guide rod, a locking piece and a belleville spring, the upper backing plate is provided with a limiting hole, a guide hole and a mounting hole, the peripheral side of the upper end of the guide rod is provided with a limiting plate, and the belleville spring is arranged in the mounting hole and sleeved outside the guide rod. The two ends of the belleville spring abut against the top wall of the mounting hole and the lower base plate correspondingly, the upper end of the guide rod slidably penetrates through the guide hole, the limiting plate is located in the limiting hole, and the locking piece is used for locking the guide rod and the lower base plate together. When the bottom face of the limiting plate abuts against the bottom wall of the limiting hole, a moving space is formed between the bottom face of the upper base plate and the top face of the lower base plate. Modularized assembly of the material pressing force device is achieved, disassembly, assembly and maintenance are convenient and fast, cost is low, the guide rods play a role in guiding lifting movement of the upper base plate, the movement stability of the upper base plate is improved, and the material pressing force can be changed by replacing belleville springs with different elastic forces.

Description

Technical Field

[0001] This utility model relates to the field of stamping die technology, and in particular to a pressing force device and a stamping die. Background Technology

[0002] In automotive sheet metal stamping processes, stamping dies are often used to stamp the workpiece. Before the die and punch of the stamping die close together to stamp the workpiece, the edges of the workpiece need to be pressed together by components such as blank holders. In existing technologies, nitrogen springs are used to provide pressure to these components. However, due to the high cost of nitrogen springs and the large number required, the manufacturing cost of the stamping die is significantly increased. For example, Chinese patent application number 201420301391.6 discloses an upper die of a stamping die, including an upper die base and multiple elastic elements installed within the upper die base, as well as a cover plate detachably fixed to the upper die base. The elastic elements are fixed to the cover plate; the elastic elements are nitrogen springs connected to a gas pipe. Therefore, the shortcomings are obvious, and a solution is urgently needed. Utility Model Content

[0003] In order to solve the above-mentioned technical problems, the purpose of this utility model is to provide a pressing force device and a stamping die.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A pressing force device includes a lower pad, an upper pad, a guide rod, a locking fastener, and a butterfly spring. The upper pad is provided with a limiting hole, a guide hole, and a mounting hole in sequence from top to bottom. A limiting plate is provided on the upper periphery of the guide rod. The butterfly spring is installed in the mounting hole and sleeved on the outside of the guide rod. The two ends of the butterfly spring abut against the top wall of the mounting hole and the lower pad, respectively. The upper end of the guide rod slides through the guide hole and extends into the limiting hole. The limiting plate is located in the limiting hole. The locking fastener is used to lock the guide rod and the lower pad together. When the bottom surface of the limiting plate abuts against the bottom wall of the limiting hole, there is a movement space between the bottom surface of the upper pad and the top surface of the lower pad.

[0006] Furthermore, the guide rod is provided with an axial hole and an upper through hole in sequence from top to bottom. The locking fastener is located in the axial hole, and the locking end of the locking fastener passes through the through hole and is connected to the lower pad.

[0007] Furthermore, the lower pad is provided with a lower through hole, which is used to coaxially communicate with the upper through hole, and the locking end of the fastener passes through the upper through hole and the lower through hole in sequence.

[0008] Furthermore, the locking device is a locking screw.

[0009] Furthermore, there are multiple butterfly springs, which are arranged in a straight line along the guide rod.

[0010] Furthermore, the top surface of the lower pad is recessed with a positioning hole, and the bottom end of the butterfly spring and the bottom end of the guide rod both extend into the positioning hole, with the inner wall of the positioning hole abutting against the side wall of the bottom end of the butterfly spring.

[0011] This utility model also provides a stamping die, including the above-mentioned pressing force device.

[0012] The beneficial effects of this utility model are as follows: In practical applications, the lower pad of this pressure-pressing device is installed on the lower die base of the stamping die. The top surface of the upper pad abuts against the lower template or pressure ring of the stamping die. Under normal conditions, the disc spring is extended, and the bottom surface of the limiting plate abuts against the bottom wall of the limiting hole. There is a moving space between the bottom surface of the upper pad and the top surface of the lower pad. When the stamping die is closed, the lower template or pressure ring of the stamping die moves down and presses the upper pad downward, allowing the upper pad to move downward along the guide rod and compress the disc spring. The moving space provides space for the downward movement of the upper pad, and the rebound force of the disc spring applies a pressure-pressing force to the lower template or pressure ring of the stamping die via the upper pad. This utility model realizes modular assembly of the pressure-pressing device, which is convenient for disassembly, assembly, and maintenance, and has low cost. The guide rod guides the lifting and lowering movement of the upper pad, improving the moving stability of the upper pad, and the magnitude of the pressure-pressing force can be changed by replacing disc springs with different spring strengths. Attached Figure Description

[0013] Figure 1 This is a three-dimensional structural diagram of the pressing force device of this utility model.

[0014] Figure 2 This is a three-dimensional structural diagram of the stamping die of this utility model.

[0015] Explanation of reference numerals in the attached figures:

[0016] 1. Lower pad; 2. Upper pad; 3. Guide rod; 4. Locking fastener; 5. Butterfly spring; 6. Limiting hole; 7. Guide hole; 8. Mounting hole; 9. Limiting plate; 10. Axial hole; 11. Upper through hole; 12. Lower through hole; 13. Positioning hole; 14. Movement space. Detailed Implementation

[0017] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to embodiments and accompanying drawings. The content mentioned in the embodiments is not intended to limit the present invention.

[0018] like Figure 1 and Figure 2As shown, the present invention provides a pressing force device, which includes a lower pad 1, an upper pad 2, a guide rod 3, a locking fastener 4, and a butterfly spring 5. The upper pad 2 is provided with a limiting hole 6, a guide hole 7, and a mounting hole 8 connected sequentially from top to bottom. A limiting plate 9 is provided on the upper periphery of the guide rod 3. The butterfly spring 5 is installed in the mounting hole 8 and sleeved on the guide rod 3. The two ends of the butterfly spring 5 abut against the top wall of the mounting hole 8 and the lower pad 1, respectively. The upper end of the guide rod 3 slides through the guide hole 7 and extends into the limiting hole 6. The limiting plate 9 is located in the limiting hole 6. The locking fastener 4 is used to lock the guide rod 3 and the lower pad 1 together. When the bottom surface of the limiting plate 9 abuts against the bottom wall of the limiting hole 6, there is a moving space 14 between the bottom surface of the upper pad 2 and the top surface of the lower pad 1.

[0019] In practical applications, the lower pad 1 of this pressing force device is installed on the lower die base of the stamping die. The top surface of the upper pad 2 abuts against the lower die plate or pressure ring of the stamping die. Under normal conditions, the disc spring 5 is extended, and the bottom surface of the limiting plate 9 abuts against the bottom wall of the limiting hole 6. There is a moving space 14 between the bottom surface of the upper pad 2 and the top surface of the lower pad 1. When the stamping die is closed, the lower die plate or pressure ring of the stamping die moves down and presses the upper pad 2 downward, so that the upper pad 2 can move downward along the guide rod 3 and compress the disc spring 5. The moving space 14 provides space for the downward movement of the upper pad 2. The rebound force of the disc spring 5 applies pressing force to the lower die plate or pressure ring of the stamping die through the upper pad 2. This utility model realizes the modular assembly of the pressing force device, which is convenient for disassembly and maintenance, and has low cost. The guide rod 3 plays a guiding role in the lifting and moving of the upper pad 2, which improves the moving stability of the upper pad 2, and the pressing force can be changed by replacing the disc springs 5 ​​with different elastic forces.

[0020] In this embodiment, the guide rod 3 is provided with an axial hole 10 and an upper through hole 11 connected sequentially from top to bottom. The locking fastener 4 is located inside the axial hole 10, and the locking end of the locking fastener 4 passes through the through hole and connects to the lower pad 1. This structural design facilitates the locking of the guide rod 3 and the lower pad 1 together and reduces the weight of this pressing force device.

[0021] In this embodiment, the lower pad 1 is provided with a lower through hole 12, which is used to coaxially communicate with the upper through hole 11. The locking end of the locking fastener 4 passes through the upper through hole 11 and the lower through hole 12 in sequence; specifically, the locking fastener 4 is a locking screw. In practical applications, the screw of the locking fastener 4 passes through the upper through hole 11 and the lower through hole 12 in sequence and is threadedly connected to the external structure (the lower die base of the stamping die) to lock the guide rod 3, the lower pad 1 and the external structure together.

[0022] In this embodiment, there are multiple butterfly springs 5, which are arranged in a straight line along the guide rod 3. In practical applications, the pressure force can be changed by increasing the number of butterfly springs 5 ​​and / or changing the elastic force of the butterfly springs 5.

[0023] In this embodiment, a positioning hole 13 is recessed on the top surface of the lower pad 1. The bottom end of the butterfly spring 5 and the bottom end of the guide rod 3 both extend into the positioning hole 13, and the inner wall of the positioning hole 13 abuts against the side wall of the bottom end of the butterfly spring 5. In practical applications, the positioning hole 13 plays a positioning role for the butterfly spring 5, which not only facilitates the installation of the butterfly spring 5, but also improves the positional accuracy and working stability of the butterfly spring 5.

[0024] This utility model also provides a stamping die, including the above-mentioned pressure device, which has all the beneficial effects of the pressure device, and will not be described in detail here.

[0025] All technical features in this embodiment can be freely combined according to actual needs.

[0026] The above embodiments are preferred implementations of this utility model. In addition, this utility model can also be implemented in other ways. Any obvious substitutions without departing from the concept of this technical solution are within the protection scope of this utility model.

Claims

1. A pressing force device, characterized in that: The device includes a lower pad (1), an upper pad (2), a guide rod (3), a locking fastener (4), and a butterfly spring (5). The upper pad (2) is provided with a limit hole (6), a guide hole (7), and a mounting hole (8) in sequence from top to bottom. A limit plate (9) is provided on the upper periphery of the guide rod (3). The butterfly spring (5) is installed in the mounting hole (8) and sleeved on the outside of the guide rod (3). The two ends of the butterfly spring (5) are respectively connected to the mounting hole (8). The top wall of the upper pad (2) and the lower pad (1) abut against each other. The upper end of the guide rod (3) slides through the guide hole (7) and extends into the limiting hole (6). The limiting plate (9) is located in the limiting hole (6). The locking fastener (4) is used to lock the guide rod (3) and the lower pad (1) together. When the bottom surface of the limiting plate (9) abuts against the bottom wall of the limiting hole (6), there is a moving space (14) between the bottom surface of the upper pad (2) and the top surface of the lower pad (1).

2. The pressing force device according to claim 1, characterized in that: The guide rod (3) is provided with an axial hole (10) and an upper through hole (11) in sequence from top to bottom. The locking fastener (4) is located in the axial hole (10). The locking end of the locking fastener (4) passes through the through hole and is connected to the lower pad (1).

3. The pressing force device according to claim 2, characterized in that: The lower pad (1) is provided with a lower through hole (12), which is used to coaxially communicate with the upper through hole (11). The locking end of the locking fastener (4) passes through the upper through hole (11) and the lower through hole (12) in sequence.

4. A pressing force device according to claim 2 or 3, characterized in that: The locking component (4) is a locking screw.

5. The pressing force device according to claim 1, characterized in that: There are multiple butterfly springs (5), and the multiple butterfly springs (5) are arranged in a straight line along the guide rod (3).

6. The pressing force device according to claim 1, characterized in that: The top surface of the lower pad (1) is recessed with a positioning hole (13). The bottom end of the butterfly spring (5) and the bottom end of the guide rod (3) both extend into the positioning hole (13). The inner wall of the positioning hole (13) abuts against the bottom side wall of the butterfly spring (5).

7. A stamping die, characterized in that: Includes the pressing force device as described in any one of claims 1 to 6.

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