Cold forming die for bending circular plate for oil press

Abstract

The utility model belongs to the technical field of cold forming, and particularly relates to a cold forming die for bending a circular plate for an oil press. The die comprises an upper die body and a lower die body, the upper die body comprises a connecting top plate, a reinforcing rib arranged below the connecting top plate, a male die body fixed to the lower portion of the reinforcing rib and a positioning baffle fixed to the reinforcing rib, and the lower die body comprises a female die body, a positioning guide rod fixed to the side edge of the female die body and a plate positioning groove formed in the inner side of the female die body. A positioning guide rod in the lower mold is matched with a positioning baffle in the upper mold, it is ensured that the upper mold and the lower mold are always located on the same axis in the running process, and a demolding structure is arranged at the bottom of the lower mold. According to the cold forming die, cold forming of circular plate bending is achieved, the movement stability of the die is improved, and the plate forming precision and the production efficiency are improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of cold forming, and in particular relates to a cold forming die for bending a circular plate for an oil press. Background Art

[0002] Cold forming is a production technology that uses the power of conventional or special cold forming equipment to directly subject the sheet metal to deformation force in the mold and deform it, thereby obtaining product parts with certain shapes, sizes and performances. Summary of the invention

[0003] The utility model aims to provide a cold forming die for bending a circular plate for a hydraulic press, which realizes the cold forming of the circular plate, improves the movement stability of the die, and improves the plate forming accuracy and production efficiency.

[0004] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is:

[0005] A cold forming die for bending a circular plate for a hydraulic press comprises an upper die and a lower die. The upper die comprises a connecting top plate, a reinforcing rib arranged under the connecting top plate, a punch fixed at the lower part of the reinforcing rib, and a positioning baffle fixed on the reinforcing rib. The lower die comprises a concave die, a positioning guide rod fixed at the side of the concave die, and a plate positioning groove arranged at the inner side of the concave die. The positioning guide rod in the lower die cooperates with the positioning baffle in the upper die to ensure that the upper die and the lower die are always on the same axis during operation. A demoulding structure is arranged at the bottom of the lower die.

[0006] There are 3 positioning baffles.

[0007] There are 3 positioning guide rods.

[0008] The demoulding structure is in the shape of a circular ring.

[0009] The diameter of the demoulding structure is larger than the maximum diameter of the final sheet material.

[0010] The sheet to be cold formed is placed in the sheet positioning groove.

[0011] The connecting top plate is fixed on the hydraulic press.

[0012] The beneficial effects achieved by the utility model are:

[0013] The utility model realizes the cold forming of the circular plate bending. The circular plate bending cold forming precision is higher, and the production efficiency is improved. The automatic demoulding reduces the time of manual auxiliary demoulding. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the cold forming die structure;

[0015] Figure 2Schematic diagram of the demoulding structure of the lower die

[0016] Figure 3 Schematic sectional view of the demoulding structure of the lower die

[0017] In the figure, 1 is the upper die, 2 is the lower die, 11 is the connecting top plate, 12 is the reinforcing rib, 13 is the punch, 14 is the positioning baffle, 21 is the die cavity, 22 is the positioning guide rod, 23 is the sheet metal positioning groove, and 3 is the demoulding structure. Specific implementation mode

[0018] The present utility model will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0019] Figure 1 Schematic diagram of the cold forming die structure, including the upper die 1 and the lower die 2. The upper die 1 includes a connecting top plate 11, a reinforcing rib 12 arranged under the connecting top plate 11, a punch 13 fixed to the lower part of the reinforcing rib 12, and three positioning baffles 14 fixed to the reinforcing rib 12. The lower die 2 includes a die cavity 21, three positioning guide rods 22 fixed to the side of the die cavity 21, and a sheet metal positioning groove 23 arranged inside the die cavity 21. The positioning guide rods 22 in the lower die 2 cooperate with the positioning baffles 14 in the upper die 1 to ensure that the upper die 1 and the lower die 2 are always on the same axis during operation.

[0020] Figure 2 Schematic diagram of the demoulding structure of the lower die. The diameter of the demoulding structure 3 is larger than the maximum diameter of the final sheet metal forming. A demoulding structure 3 is arranged at the bottom of the lower die 2, and the demoulding structure 3 is in an annular shape.

[0021] Place the sheet metal to be cold formed into the sheet metal positioning groove 23, and use connecting bolts matching the used hydraulic press to fix the connecting top plate 11 on the hydraulic press. The upper die 1 moves downward, and the punch 13 contacts the sheet metal. Under the action of the die cavity 21, the punch 13 extrudes the circular sheet metal to complete the cold forming of the sheet metal. The upper die 1 continues to move downward to further shape the cold formed sheet metal until the sheet metal enters the demoulding structure 3 and automatically falls. During the movement of the upper die 1, the positioning baffle 14 fixed on the upper die 1 and the positioning guide rod 22 fixed on the lower die 2 cooperate with each other to ensure that the upper die 1 and the lower die 2 are on the same axis.

[0022] A cold forming die for bending circular plates of a hydraulic press, comprising an upper die, a lower die, a guiding structure, and a plate positioning structure. The cooperation of a guiding hole plate and a guiding rod is adopted to ensure the coaxiality of the upper and lower dies, thereby ensuring the cold forming precision. The use of the reinforcing rib structure of the upper die reduces the weight of the die and increases the pressure that the upper die can bear. The plate positioning groove structure of the lower die is adopted to reduce the time for manual alignment of the center of the circle, ensure that the relative position of the plate and the die does not change during the cold forming process, and improve the cold forming precision and efficiency. The demoulding structure at the bottom of the lower die is used, and the diameter of the demoulding structure is larger than the maximum diameter of the plate after cold forming, realizing automatic demoulding.

[0023] The key of the present utility model lies in the cooperation of the positioning guide rod of the lower die and the positioning baffle of the upper die, which ensures the coaxiality of the upper and lower dies during operation. The key of the present utility model lies in that the lower die is provided with a plate positioning groove, which reduces the time for manual alignment of the center of the circle and improves the production precision and efficiency. The key of the present utility model lies in that a demoulding structure is arranged at the bottom of the lower die, which can realize automatic demoulding of the formed plate. The key of the present utility model lies in the cooperation of the punch and the die to realize the bending of the circular plate.

Claims

1. A cold forming die for bending circular plates used in a hydraulic press, characterized in that: It includes an upper die and a lower die. The upper die includes a connecting top plate, reinforcing ribs arranged under the connecting top plate, a punch fixed to the lower part of the reinforcing ribs, and a positioning baffle fixed to the reinforcing ribs. The lower die includes a die cavity, positioning guide rods fixed to the sides of the die cavity, and a sheet metal positioning groove arranged inside the die cavity. The positioning guide rods in the lower die cooperate with the positioning baffle in the upper die to ensure that the upper die and the lower die are always on the same axis during operation. A demolding structure is arranged at the bottom of the lower die.

2. The cold forming die for bending circular plates of a hydraulic press according to claim 1, characterized in that: There are 3 positioning baffles.

3. The cold forming die for bending circular plates of a hydraulic press according to claim 1, characterized in that: There are 3 positioning guide rods.

4. The cold forming die for bending circular plates used in a hydraulic press according to claim 1, wherein: The demolding structure is annular.

5. The cold forming die for bending circular plates of a hydraulic press according to claim 1, characterized in that: The diameter of the demolding structure is larger than the maximum diameter of the final sheet metal forming.

6. The cold forming die for bending circular plates used in a hydraulic press according to claim 1, characterized in that: The sheet metal to be cold-formed is placed in the sheet metal positioning groove.

7. The cold forming die for bending circular plates of a hydraulic press according to claim 1, characterized in that: The connecting top plate is fixed to the hydraulic press.

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