A stamping die mechanism for forming a wall of a variable oil tank

Abstract

The utility model provides a kind of stamping and pressing mechanism of variable oil tank wall, belong to mould technical field, the stamping and pressing mechanism of variable oil tank wall includes upper die and lower die, upper die is installed in the hydraulic lifting end of punch press, lower die is installed on the workbench of punch press;Material is placed on the concave die plate, and punch material can be punched by protruding die core, bending die plate, concave die plate and bending die plate, so that the oil tank bending after stamping is completed with smooth transition, bending angle and shape can keep consistent, improve the practicability of device.

Description

Technical Field

[0001] This utility model belongs to the field of mold technology, specifically relating to a stamping and forming mechanism for the wall of a distribution tank. Background Technology

[0002] Traditionally, transformer tank walls are mostly constructed using bending and welding methods. Welding methods result in low material utilization, a large amount of welding work, a tendency to produce welding deformation requiring correction, high production costs, and overall strength and aesthetics that are inferior to integrally pressed products.

[0003] While bending methods offer high material utilization and good overall aesthetics, they suffer from poor consistency in bending angles and shapes, and difficulty in producing complex cross-sections with smooth transitions. Therefore, there is an urgent need in this field for a specialized forming mechanism that can achieve high efficiency, high precision, one-time forming without damaging the workpiece surface, to meet higher requirements for fuel tank quality and production efficiency. Utility Model Content

[0004] The purpose of this utility model is to provide a stamping and forming mechanism for the tank wall of a distribution transformer, which aims to solve the problems of poor consistency of bending angle and shape during the stamping process in the prior art, and the difficulty in processing complex cross sections with smooth transitions.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a stamping and forming mechanism for the wall of a distribution transformer tank, comprising: an upper mold and a lower mold, wherein the upper mold is installed on the hydraulic lifting end of a stamping machine, and the lower mold is installed on the worktable of the stamping machine; The upper die includes a punch fixing plate, a punch core, and a bending die. The punch fixing plate is installed on the hydraulic lifting end of the stamping machine, the punch core is installed below the punch fixing plate, and the punch core is located at the center of the punch fixing plate. The bending die is installed below the punch fixing plate, and the side wall of the bending die is connected to the side wall of the punch core. The lower die includes a die fixing plate, a die template, and a bending template. The die fixing plate is installed on the worktable of the stamping machine, the die template is installed above the die fixing plate, the die template has a forming groove that matches the punch core, and the bending template has a bending groove.

[0006] As a stamping and forming mechanism for the tank wall of a distribution transformer oil tank according to this utility model, preferably, the distance between the bottom of the bending die and the punch fixing plate is greater than the distance between the bottom of the punch core and the punch fixing plate, the bottom of the bending die and the bottom of the punch core are stepped from left to right, the height of the bending template is higher than the height of the concave template, and the top of the bending template and the top of the concave template are stepped from left to right.

[0007] As a stamping and forming mechanism for the tank wall of a distribution transformer oil tank according to this utility model, preferably, a gap is left between the bending template and the concave template.

[0008] As a stamping and forming mechanism for the tank wall of a distribution transformer tank according to this utility model, preferably, the bottom of the bending die and the punch core are provided with an arc-shaped part, and the forming groove and the bending groove are provided with an arc-shaped slot adapted to the arc-shaped part.

[0009] As a stamping and forming mechanism for the tank wall of a distribution transformer tank according to the present invention, preferably, the top of the concave template is provided with positioning plates spaced apart front and back, and the opposite ends of the two positioning plates are provided with inverted L-shaped notches. A U-shaped limiting plate is installed inside the forming groove, and the U-shaped limiting plate is located at the inverted L-shaped notches of the positioning plates away from the bending template.

[0010] As a stamping and forming mechanism for the tank wall of a distribution transformer tank according to the present invention, preferably, L-shaped fixing plates are installed at both ends of the concave template, the L-shaped fixing plates are symmetrically arranged, the upper surface of the L-shaped fixing plates is connected to the bottom of the positioning plate, and a fixing plate is installed at the end of the concave template away from the bending template.

[0011] As a stamping and forming mechanism for the tank wall of a distribution transformer tank according to the present invention, preferably, the concave template has a letter mold groove that is spaced apart on the left and right and runs through the top and bottom, and a letter mold is provided inside the letter mold groove.

[0012] Compared with the prior art, the beneficial effects of this utility model are: 1. The stamping and forming mechanism of the distribution transformer tank wall places the material on the concave template, and stamps the material through the punch core, bending template, concave template and bending template, so that the bending part of the tank after stamping has a smooth transition, and the bending angle and shape can be kept consistent, which improves the practicality of the device.

[0013] 2. The stamping and forming mechanism of the distribution transformer tank wall places the molding material at the inverted L-shaped bayonet, which can fix the front and rear ends of the molding material. The U-shaped limiting plate can limit the lateral displacement of the molding material during the stamping process, so that the size and shape of the formed tank are consistent, and prevent the material from lateral displacement or twisting deformation during the stamping process. Attached Figure Description

[0014] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings: Figure 1 This is a three-dimensional exploded view of the upper and lower molds in a specific embodiment of the present invention; Figure 2 This is a front view of a specific embodiment of the present invention; Figure 3for Figure 2 Enlarged structural diagram at point B; Figure 4 This is a side view of the lower mold in a specific embodiment of the present invention; Figure 5 for Figure 4 A schematic diagram of the cross-sectional structure of AA; Figure 6 This is a top view of the lower mold in this utility model. Figure 7 This is a three-dimensional structural diagram of the part after stamping.

[0015] In the diagram: 10. Upper mold; 11. Punch fixing plate; 12. Punch core; 13. Bending mold; 14. Arc-shaped part; 20. Lower mold; 21. Cavity fixing plate; 22. Cavity template; 23. Forming groove; 231. U-shaped limiting plate; 24. Bending template; 25. Bending groove; 26. Arc-shaped slot; 27. Positioning plate; 271. Inverted L-shaped bayonet; 28. L-shaped fixing plate; 29. ​​Fixing plate; 30. Letter mold groove; 31. Letter mold. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] Please see Figure 1-7 The present invention provides the following technical solution: a stamping and forming mechanism for the wall of a distribution tank, comprising: an upper mold 10 and a lower mold 20, the upper mold 10 being installed on the hydraulic lifting end of a stamping machine, the lower mold 20 being installed on the worktable of the stamping machine, the stamping machine driving the upper mold 10 to move up and down, and the stamping of the material can be completed through the interaction of the upper mold 10 and the lower mold 20.

[0018] The upper die 10 includes a punch fixing plate 11, a punch core 12, and a bending die 13. The punch fixing plate 11 is installed on the hydraulic lifting end of the stamping machine. The punch core 12 is installed below the punch fixing plate 11 and is located at the center of the punch fixing plate 11. The bending die 13 is installed below the punch fixing plate 11 and is used to bend the front end of the material. The side wall of the bending die 13 is connected to the side wall of the punch core 12.

[0019] The lower die 20 includes a die fixing plate 21, a die template 22, and a bending template 24. The die fixing plate 21 is installed on the worktable of the stamping machine, and the die template 22 is installed above the die fixing plate 21. The die template 22 has a forming groove 23 that matches the punch core 12. The material can be processed by the mutual pressing of the punch core 12 and the forming groove 23. The bending template 24 has a bending groove 25 that matches the bending die 13. The front part of the material can be bent by the mutual pressing of the bending groove 25 and the bending die 13.

[0020] The distance between the bottom of the bending die 13 and the punch fixing plate 11 is greater than the distance between the bottom of the punch core 12 and the punch fixing plate 11. This allows the punch core 12 to first contact the forming groove 23 and complete the middle stamping during the stamping process. Then, the bending die 13 continues to descend and cooperates with the bending groove 25 to complete the front end bending, thereby realizing the continuous stamping action of middle forming and front end bending of the material.

[0021] Please see Figure 1-7 The bottom of the bending die 13 and the bottom of the punch core 12 are stepped from left to right. The height of the bending template 24 is higher than the height of the concave template 22. The top of the bending template 24 and the top of the concave template 22 are stepped from left to right. The height of the bending template 24 is higher than the height of the concave template 22. The top of the bending template 24 and the top of the concave template 22 are stepped from left to right. This allows the punch core 12 to first contact the concave template 22 and complete the middle forming during the stamping process. Then, the bending die 13 cooperates with the bending groove 25 on the bending template 24 to realize the stamping and bending of the front end of the material.

[0022] A gap is left between the bending template 24 and the concave template 22, and the length of the bending die 13 is less than the length of the convex core 12, such as... Figure 2 and Figure 3 As shown, during the stamping process, the front end of the material is deformed by the cooperation of the bending die 13 and the bending groove 25, and extends smoothly upward in the gap, forming a shape as shown. Figure 7 The inclined bending structure shown ensures that the oil tank structure is intact after stamping and that there is no stress concentration at the bending part.

[0023] The bottom of the bending die 13 and the punch core 12 is provided with an arc-shaped part 14, and the forming groove 23 and the bending groove 25 are provided with arc-shaped slots 26 that are adapted to the arc-shaped part 14, so as to ensure that the bending part of the oil tank wall after stamping is smooth and avoid cracks or deformation defects.

[0024] Please see Figure 1-7The top of the concave template 22 is provided with positioning plates 27 at intervals. The opposite ends of the two positioning plates 27 are provided with inverted L-shaped slots 271. The two inverted L-shaped slots 271 are symmetrically arranged to limit and fix the front and rear ends of the material. The inverted L-shaped slots 271 are located at the two side edges of the forming groove 23 to ensure that the material will not shift or slide during the stamping process, thereby improving the processing accuracy and stability.

[0025] A U-shaped limiting plate 231 is installed inside the forming groove 23. The U-shaped limiting plate 231 is located at the inverted L-shaped notch 271 of the positioning plate 27 away from the bending template 24. The U-shaped limiting plate 231 is used to limit the lateral movement of the material, preventing lateral displacement or torsional deformation of the material during stamping. This ensures that the material is evenly stressed in the direction of the bending die 13 during stamping, thereby ensuring the accuracy and stability of the stamping process. The opening of the U-shaped limiting plate 231 faces the punch core 12, and its two side arms are tightly fitted to the inner wall of the forming groove 23.

[0026] L-shaped fixing plates 28 are installed at both ends of the concave template 22. The L-shaped fixing plates 28 are symmetrically arranged. The upper surface of the L-shaped fixing plates 28 is connected to the bottom of the positioning plate 27. The L-shaped fixing plates 28 can provide stable support for the positioning plate 27. A fixing plate 29 is installed at the end of the concave template 22 away from the bending template 24. The fixing plate 29 is used to provide stable support for the concave template 22, ensuring that the entire mold remains stable during the stamping process and does not shift or vibrate, thereby improving the quality and consistency of the oil tank stamping.

[0027] The concave template 22 has a letter mold groove 30 that is spaced left and right and runs through the top and bottom. The letter mold 30 is provided with a letter mold 31. By changing different letter molds 31, the marking information on the surface of the oil tank can be adjusted to meet diverse production needs.

[0028] Please see Figure 1-7 Working principle: During use, the operator places the material to be stamped on the top of the concave template 22 and engages its front and rear ends with the inverted L-shaped slots 271 of the positioning plate 27 for initial positioning. Then, the stamping equipment is started, and the punch core 12 and bending die 13 gradually press down. The material, with the cooperation of the bending die 13 and the bending groove 25, completes the bending of the front end, while the bent portion extends smoothly upwards in the gap, forming a beveled bending structure. During the stamping process, the U-shaped limiting plate 231 effectively prevents lateral displacement of the material, and the fixing plate 29 ensures the stability of the concave template 22, thus guaranteeing the stability of the stamping process and the forming quality.

[0029] After stamping is completed, the operator can remove the formed tank component from the concave template 22, completing one work cycle. Through the above structural design, not only are multiple limiting functions for material front-to-back, lateral, and overall support achieved, but the replaceable letter mold 31 also improves the versatility and production flexibility of the mold, significantly improving stamping efficiency and product consistency.

[0030] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims and not by the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A stamping and forming mechanism for the wall of a distribution transformer tank, comprising: The upper mold and the lower mold are installed on the hydraulic lifting end of the stamping machine and on the worktable of the stamping machine. The upper mold is characterized by comprising a punch fixing plate, a punch core, and a bending mold. The punch fixing plate is installed on the hydraulic lifting end of the stamping machine, the punch core is installed below the punch fixing plate, the punch core is located at the center of the punch fixing plate, and the bending mold is installed below the punch fixing plate. The side wall of the bending mold is connected to the side wall of the punch core. The lower die includes a die fixing plate, a die template, and a bending template. The die fixing plate is installed on the worktable of the stamping machine, and the die template is installed above the die fixing plate. The die template has a forming groove that matches the punch core, and the bending template has a bending groove.

2. The stamping and forming mechanism for the tank wall of a distribution transformer oil tank according to claim 1, characterized in that: The distance between the bottom of the bending die and the punch fixing plate is greater than the distance between the bottom of the punch core and the punch fixing plate. The bottom of the bending die and the bottom of the punch core are stepped from left to right. The height of the bending template is higher than the height of the concave template. The top of the bending template and the top of the concave template are stepped from left to right.

3. The stamping and forming mechanism for the tank wall of a distribution transformer oil tank according to claim 2, characterized in that: A gap is left between the bending template and the concave template.

4. The stamping and forming mechanism for the tank wall of a distribution transformer oil tank according to claim 3, characterized in that: The bending die and the punch core are provided with an arc-shaped part at the bottom, and the forming groove and the bending groove are provided with an arc-shaped slot adapted to the arc-shaped part.

5. The stamping and forming mechanism for the tank wall of a distribution transformer oil tank according to claim 1, characterized in that: The top of the concave template is provided with positioning plates spaced at both ends. The opposite ends of the two positioning plates are provided with inverted L-shaped notches. A U-shaped limiting plate is installed inside the forming groove. The U-shaped limiting plate is located at the inverted L-shaped notches of the positioning plates away from the bending template.

6. The stamping and forming mechanism for the tank wall of a distribution transformer oil tank according to claim 5, characterized in that: The concave template is equipped with L-shaped fixing plates at both ends. The L-shaped fixing plates are symmetrically arranged. The upper surface of the L-shaped fixing plates is connected to the bottom of the positioning plate. The end of the concave template away from the bending template is equipped with a fixing plate.

7. The stamping and forming mechanism for the tank wall of a distribution transformer oil tank according to claim 1, characterized in that: The concave template has a character mold groove that is spaced apart on the left and right and runs through the top and bottom, and a character mold is set inside the character mold groove.

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