Cold forming die

Abstract

The utility model provides a cold forming die. The cold forming die comprises a closing-in die and a flattening die, the closing-in die comprises a connecting plate, a male die is arranged at the bottom of the connecting plate, a closing-in female die matched with the male die is arranged below the male die, a bottom plate is arranged at the bottom of the closing-in female die, an ejector plate is arranged on the inner side of the closing-in female die, and an ejector rod is arranged in the center of the bottom of the ejector plate. The flattening die comprises an upper die plate, a forming male die is arranged at the bottom of the upper die plate, a forming female die matched with the forming male die is arranged below the forming male die, a lower die base is arranged at the bottom of the forming female die, a supporting plate is arranged on the inner side of the forming female die, and a plurality of elastic components are arranged between the supporting plate and the lower die base. According to the scheme, the cold forming die comprises the closing-in die and the flattening die, so that workpiece forming is completed through the closing-in process and the flattening process, the structure is simple, operation is convenient, forming is good, the size is stable, consumption of electricity for heating can be reduced, and the production cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical processing, in particular to a cold forming die. Background Art

[0002] Engineering retaining ring is one of the important components of heavy-duty engineering vehicle wheels, directly bearing the pressure transmitted by the tire. The existing processing technology of engineering retaining ring is hot forming, which not only consumes a lot of heating energy and is costly, but also changes in size after cooling after hot forming, and different heating temperatures will also affect the stability of the workpiece size. Utility Model Content

[0003] The utility model provides a cold forming die to solve the technical problem that the existing processing technology of engineering retaining ring is hot forming, which not only consumes a lot of heating energy and is costly, but also changes the size when cooled after hot forming, and the different heating temperatures also affect the stability of the workpiece size.

[0004] In order to solve the above technical problems, the utility model provides the following technical solutions:

[0005] A cold forming die comprises a closing die and a flattening die; the closing die comprises a connecting plate, a punch is arranged at the bottom of the connecting plate, a closing die matched with the punch is arranged below the punch, a bottom plate is arranged at the bottom of the closing die, an ejector plate is arranged on the inner side of the closing die, and an ejector rod is arranged at the bottom center of the ejector plate; the flattening die comprises an upper die plate, a forming punch is arranged at the bottom of the upper die plate, a forming die matched with the forming punch is arranged below the forming punch, a lower die seat is arranged at the bottom of the forming die, a support plate is arranged on the inner side of the forming die, a plurality of elastic components are arranged between the support plate and the lower die seat, and under the action of the elastic components, the support plate can slide along the inner wall of the forming die.

[0006] Optionally, an arc-shaped forming portion is provided at the bottom of the punch, and the forming portion is recessed inwardly relative to the outer wall of the punch.

[0007] Optionally, the inner wall of the closing die includes a vertical section, an arc section and a stepped section that are connected in sequence and match the ejection plate, wherein the vertical section matches the outer diameter of the punch.

[0008] Optionally, a convex edge is provided at the bottom of the inner wall of the forming die, an annular groove matching the convex edge is provided on the outer wall of the support plate, and the lower end surface edge of the support plate is located on the lower die seat.

[0009] Optionally, the lower mold base is provided with a plurality of first grooves evenly distributed in an annular shape, the bottom surface of the support plate is provided with second grooves corresponding to the first grooves one by one, one end of the elastic member is provided in the first groove, and the other end is inserted into the corresponding second groove.

[0010] Optionally, a boss is provided at the top end of the ejection rod, the boss is inserted in the ejection plate, the top of the boss is connected to the pressure plate via a fixing screw, and the ejection plate is provided with a receiving groove adapted to the pressure plate.

[0011] Optionally, the closing die is fixedly connected to the base plate by a first screw, the punch is fixedly connected to the connecting plate by a second screw, the bottom of the elastic component is fixedly connected to the lower die base by a third screw, the forming die is fixedly connected to the lower die base by a fourth screw, and the forming punch is fixedly connected to the upper die plate by a fifth screw.

[0012] The beneficial effects of the above technical solution of the utility model are as follows:

[0013] In the above scheme, the cold forming mold includes a closing mold and a flattening mold, so that the workpiece forming is completed in two steps of closing and flattening. It has a simple structure, convenient operation, good forming, stable size, and can save heating electricity consumption, thereby reducing production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the closing die of the cold forming die of the utility model;

[0015] Figure 2 It is a structural schematic diagram of the flattening die of the cold forming die of the utility model.

[0016] [Reference Signs]

[0017] 1. Bottom plate; 2. First screw; 3. Closing die; 4. Punch; 5. Connecting plate;

[0018] 6. Second screw; 7. Fixing screw; 8. Ejector plate; 9. Pressing plate; 10. Ejector rod;

[0019] 11. Lower die base; 12. Third screw; 13. Fourth screw; 14. Nitrogen spring; 15. Support plate;

[0020] 16. Forming die; 17. Forming punch; 18. Upper mold plate; 19. Fifth screw. DETAILED DESCRIPTION

[0021] In order to make the technical problems to be solved, technical solutions and advantages of the present invention more clear, a detailed description will be given below in conjunction with the accompanying drawings and specific embodiments.

[0022] like Figure 1~Figure 2 As shown, an embodiment of the utility model provides a cold forming mold, including a closing mold and a flattening mold, so that the workpiece forming is completed in two steps of closing and flattening; the closing mold includes a connecting plate 5, a punch 4 is arranged at the bottom of the connecting plate 5, a closing die 3 matched with the punch 4 is arranged below the punch 4, a bottom plate 1 is arranged at the bottom of the closing die 3, an ejector plate 8 is arranged on the inner side of the closing die 3, and an ejector rod 10 is arranged at the bottom center of the ejector plate 8; the flattening mold includes an upper mold plate 18, a forming punch 17 is arranged at the bottom of the upper mold plate 18, a forming die 16 matched with the forming punch 17 is arranged below the forming punch 17, a lower mold seat 11 is arranged at the bottom of the forming die 16, a support plate 15 is arranged on the inner side of the forming die 16, a plurality of nitrogen springs 14 are arranged between the support plate 15 and the lower mold seat 11, and under the action of the nitrogen springs 14, the support plate 15 can slide along the inner wall of the forming die 16.

[0023] like Figure 1 As shown, the bottom of the punch 4 is provided with an arc-shaped forming portion, which is recessed inward relative to the outer wall of the punch 4. The inner wall of the closing die 3 includes a vertical section, an arc section and a stepped section connected in sequence to match the ejection plate 8, wherein the vertical section matches the outer diameter of the cylinder to be processed and also matches the outer diameter of the punch 4.

[0024] like Figure 2 As shown, the bottom of the inner wall of the forming die 16 is provided with a convex edge, the outer wall of the support plate 15 is provided with an annular groove adapted to the convex edge, and the lower end surface edge of the support plate 15 is located on the lower die seat 11. When the support plate 15 moves downward, it can be limited by the convex edge of the forming die 16 and the lower die seat 11 at the same time.

[0025] like Figure 2 As shown, the lower die base 11 is evenly distributed in a ring with 6 to 12 first grooves for installing the nitrogen springs 14, and the bottom surface of the support plate 15 is provided with second grooves corresponding to the first grooves one by one. One end of the nitrogen spring 14 is arranged in the first groove, and the other end is inserted into the corresponding second groove.

[0026] like Figure 1 As shown, the ejector rod 10 is fixedly connected to the ejector plate 8 through the pressure plate 9 and the fixing screws 7. Specifically, a boss is provided at the top of the ejector rod 10, the boss is inserted in the ejector plate 8, the top of the boss is connected to the pressure plate 9 through the fixing screws 7, and the ejector plate 8 is provided with a receiving groove adapted to the pressure plate 9.

[0027] In this embodiment, the closing die 3 is fixedly connected to the base plate 1 by the first screw 2, the punch 4 is fixedly connected to the connecting plate 5 by the second screw 6, the bottom of the nitrogen spring 14 is fixedly connected to the lower die base 11 by the third screw 12, the forming die 16 is fixedly connected to the lower die base 11 by the fourth screw 13, and the forming punch 17 is fixedly connected to the upper die plate 18 by the fifth screw 19.

[0028] The use process of the cold forming mold provided by the utility model is as follows:

[0029] Closing process: put the workpiece into the closing die 3 of the closing mold, and move the punch 4 downward into the inner cavity of the closing die 3 to drive the workpiece to move downward, deform and close; after the closing is completed, start the press, and the ejector rod 10 drives the ejector plate 8 to move upward to eject the workpiece; after taking out the workpiece, turn to the flattening process.

[0030] Flattening process: place the workpiece on the support plate 15 of the flattening mold, and the forming punch 17 moves down into the inner cavity of the forming die 16, driving the support plate 15 to move down until it contacts the convex edge on the inner side of the forming die 16. The forming punch 17, the forming die 16 and the support plate 15 flatten the workpiece and keep the pressure for 30S; lift the forming punch 17, and the support plate 15 moves up under the action of the nitrogen spring 14 to lift the formed workpiece, take out the workpiece, and complete the operation.

[0031] In the above scheme, the cold forming mold includes a closing mold and a flattening mold, so that the workpiece forming is completed in two steps of closing and flattening. It has a simple structure, convenient operation, good forming, stable size, and can save heating electricity consumption, thereby reducing production costs.

[0032] The above is a preferred embodiment of the present invention. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A cold forming die, characterized in that: Including closing mold and flattening mold; The closing mold comprises a connecting plate, a convex mold is arranged at the bottom of the connecting plate, a closing die matched with the convex mold is arranged below the convex mold, a bottom plate is arranged at the bottom of the closing die, an ejector plate is arranged on the inner side of the closing die, and an ejector rod is arranged at the bottom center of the ejector plate; The flattening mold includes an upper mold plate, a forming punch is arranged at the bottom of the upper mold plate, a forming die matched with the forming punch is arranged below the forming punch, a lower die seat is arranged at the bottom of the forming die, a support plate is arranged on the inner side of the forming die, a plurality of elastic components are arranged between the support plate and the lower die seat, and under the action of the elastic components, the support plate can slide along the inner wall of the forming die.

2. The cold forming die according to claim 1, characterized in that: An arc-shaped forming portion is provided at the bottom of the male mold, and the forming portion is recessed inwardly relative to the outer wall of the male mold.

3. The cold forming die according to claim 2, characterized in that: The inner wall of the closing die includes a vertical section, an arc section and a stepped section connected in sequence and matched with the ejector plate, wherein the vertical section is matched with the outer diameter of the punch.

4. The cold forming mold according to claim 1, characterized in that: The bottom of the inner wall of the forming die is provided with a convex edge, the outer wall of the support plate is provided with an annular groove matched with the convex edge, and the lower end surface edge of the support plate is located on the lower die seat.

5. The cold forming die according to claim 1, characterized in that: The lower die seat is provided with a plurality of first grooves evenly distributed in an annular shape, the bottom surface of the support plate is provided with second grooves corresponding to the first grooves one by one, one end of the elastic member is arranged in the first groove, and the other end is inserted into the corresponding second groove.

6. The cold forming die according to claim 1, characterized in that: The top end of the ejector rod is provided with a boss, the boss is inserted in the ejector plate, the top of the boss is connected to the pressing plate through a fixing screw, and the ejector plate is provided with a receiving groove adapted to the pressing plate.

7. The cold forming die according to claim 1, characterized in that: The closing die is fixedly connected to the bottom plate by a first screw, the punch is fixedly connected to the connecting plate by a second screw, the bottom of the elastic member is fixedly connected to the lower die base by a third screw, the forming die is fixedly connected to the lower die base by a fourth screw, and the forming punch is fixedly connected to the upper die plate by a fifth screw.

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