Large-R-angle inclined punching and bending die for outer box of gas tank

Abstract

The utility model provides a large-R-angle inclined punching and bending die for an outer box of a gas tank. The large-R-angle inclined punching and bending die comprises an inclined punch, a guide plate, a stop plate, a stripper plate, a lower bending punch and a lower die plate, the inclined punch is fixedly connected with the upper die base, and the lower end of the inclined punch is provided with an inward-concave R angle. The stripper plate is connected with the upper die base through an elastic structure, and the guide plate and the stop plate are arranged on the upper surface of the stripper plate. Puncher pin through holes are formed in the guide plate and the stripper plate, the inclined puncher pins are located in the puncher pin through holes, return springs are arranged on one sides of the inclined puncher pins, and the lower ends of the return springs abut against the stripper plate; the lower bending punch and the lower die plate are fixedly arranged on the lower die base, and the upper end of the lower bending punch is provided with a convex R angle matched with the concave R angle. The R-angle bending of a product is realized, the punch is separated from the product by utilizing the return spring, the stable structure of the punch is ensured by utilizing the guide plate, and the bending precision is ensured.

Description

Technical Field

[0001] The utility model relates to a forming die for an air box assembly, in particular to a large R-angle oblique punching and bending die for an outer box of an air box. Background Art

[0002] The bending die in the stamping process is a crucial tool in cold stamping processing, used to achieve processes such as bending, stretching, and blanking of metal sheets. In the bending process, the die mainly controls the shape of the sheet, providing precise processing angles and radius control.

[0003] One of the common bending methods is bending in the die. The punch fully presses the workpiece into the die cavity without gaps, making the workpiece fit the die to achieve its bending. Other bending methods include suspended bending, hemming, pressing, etc. When bending different angles and shapes, corresponding die components need to be selected. For example, a specific upper die should be selected when bending an acute angle or a pressed dead angle, while an R upper die and an R lower die should be selected when bending an R angle.

[0004] There is an R angle that needs to be bent on the outer box structure of the air box assembly. The existing technology is to design a movable component on the upper die, which can slide along the lower surface of the upper template. This component includes a bending block and an upper die inclined block, which are fixedly connected. The bending block has an inner concave R angle. Correspondingly, the lower template is designed with an outer convex R angle, and the two R angles cooperate to extrude and shape the product. When using the existing technology to bend the R angle, there is only guidance on the lower die, the bending structure has insufficient stability, insufficient bending accuracy, and the structure is also relatively complex, only suitable for R angle bending of thick plates. However, the outer box structure of the air box assembly is a thin plate structure. Therefore, the existing technology needs to be improved. Summary of the Utility Model

[0005] The utility model provides a large R-angle oblique punching and bending die for an outer box of an air box to solve the above problems.

[0006] One technical solution adopted by the utility model is: to provide a large R-angle oblique punching and bending die for an outer box of an air box, including: an oblique punch, a guide plate, a stop plate, a stripper plate, a lower bending punch, and a lower template;

[0007] The oblique punch is fixedly connected to the upper die base, and its lower end has an inner concave R angle;

[0008] The stripper plate is connected to the upper die base through an elastic structure, and the guide plate and the stop plate are arranged on the upper surface of the stripper plate and move up and down with the stripper plate;

[0009] The guide plate and the stripper plate have punch through holes, the oblique punch is located in the punch through holes, and a return spring is arranged on one side of the oblique punch, and the lower end of the return spring abuts against the stripper plate;

[0010] The lower bending punch and the lower template are fixedly arranged on the lower die base. The upper end of the lower bending punch has an outward convex R angle, which cooperates with the inward concave R angle to bend and form the product.

[0011] When the die is closed, the stripper plate first presses the product, the diagonal punch travels along the punch through hole, and the lower end of the inward concave R angle contacts the product until the bent section of the product is attached to the outward convex R angle.

[0012] When the die is opened, the diagonal punch first retracts, disengaging from the R angle of the product, and then the stripper plate retracts to take out the product.

[0013] Furthermore, the diagonal punch is fixed to the upper die base through a mounting seat.

[0014] Furthermore, the guide plate also has a spring through hole and a limit groove. When the stamping reaches the bottom, the return spring is compressed, and the mounting seat abuts against the limit groove.

[0015] Furthermore, a lower guide block is also arranged on the lower die base. The lower guide block has an inclined surface. When the stamping reaches the bottom, the inclined surface is connected to the side wall of the punch through hole, so that the diagonal punch always travels in an accurate direction.

[0016] Furthermore, a guide post is also arranged between the stripper plate and the upper die base to ensure that the stripper plate moves in the vertical direction.

[0017] The beneficial effects of the large R angle diagonal punching and bending die for the air box outer box of the present utility model are as follows:

[0018] 1. A diagonal punch with an inward concave R angle is provided, which cooperates with the lower bending punch with an outward convex R angle to realize the R angle bending of the product. The return spring is used to disengage the punch from the product, and the guide plate is used to ensure the stable structure of the punch, guaranteeing the bending accuracy.

[0019] 2. The structure is relatively simple and concise, suitable for R angle bending of various thin plates or thick plates, with a wide application range. Description of the Drawings

[0020] Figure 1 is a schematic diagram of the open die state of the large R angle diagonal punching and bending die for the air box outer box in the first embodiment of the present utility model;

[0021] Figure 2 is a schematic diagram of the stamping process of the large R angle diagonal punching and bending die for the air box outer box in the first embodiment of the present utility model;

[0022] Figure 3 is a schematic diagram of the closed die state of the large R angle diagonal punching and bending die for the air box outer box in the first embodiment of the present utility model;

[0023] The markings of the components in the attached drawings are as follows: 1. upper die holder, 2. inclined punch, 3. guide plate, 4. stop plate, 5. stripper plate, 6. lower die holder, 7. lower guide block, 8. lower bending punch, 9. lower template, 11. mounting seat, 21. inner concave R corner, 22. return spring, 31. limit groove, 51. elastic structure, 52. guide post, 81. outer convex R corner. Detailed implementation mode

[0024] The following elaborates on the preferred embodiments of the present invention in conjunction with the attached drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making the protection scope of the present invention more clearly defined.

[0025] In the description of the present invention, it should be understood that the orientation or positional relationships indicated by the terms "upper", "lower", "left", "right", "front", "rear", "horizontal", "vertical", "inner", "outer", etc. are based on the orientation or positional relationships shown in the attached drawings. These are only for the convenience of describing the present invention and do not indicate or imply that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0026] Please refer to Figures 1 to 3 , the first embodiment of the present invention provides a large R - angle inclined punching and bending die for the outer box of the air box, including: upper die holder 1, inclined punch 2, guide plate 3, stop plate 4, stripper plate 5, lower die holder 6, lower guide block 7, lower bending punch 8 and lower template 9;

[0027] There are multiple guide post structures between the upper die holder 1 and the lower die holder 6 to ensure the stability of the overall structure;

[0028] The inclined punch 2 is fixedly connected to the upper die holder 1 through the mounting seat 11. The lower surface of the mounting seat 11 is perpendicular to the inclined punching direction, which is convenient for fixing the inclined punch 2. The lower end of the inclined punch 2 has an inner concave R corner 21;

[0029] The stripper plate 5 is connected to the upper die holder 1 through the elastic structure 51, and a guide post 52 is also provided between the two to ensure that the stripper plate 5 moves in the vertical direction;

[0030] The guide plate 3 and the stop plate 4 are arranged on the upper surface of the stripper plate 5 and move up and down with the stripper plate 5. The former restricts the direction of the inclined punch 2, and the latter restricts the stroke of the inclined punch 2;

[0031] The guide plate 3 and the stripper plate 5 have punch through - holes, and the inclined punch 2 is located in the punch through - holes. A return spring 22 is arranged on its right side. The upper end of the return spring 22 is fixed on the mounting seat 11, and the lower end abuts against the stripper plate 5;

[0032] The guide plate 3 also has a spring through-hole and a limiting groove 31. The return spring 22 is located in the spring through-hole. When stamping to the bottom, the return spring 22 is compressed, and the mounting seat 11 abuts against the limiting groove 31, and the limiting groove 31 has the same function as the stop plate 4;

[0033] The lower guide block 7, the lower bending punch 8 and the lower template 9 are fixedly arranged on the lower die base 6. The upper end of the lower bending punch 8 has an outward convex R corner 81, which cooperates with the inward concave R corner 21 to bend and form the product. The lower template 9 restricts the position of the lower bending punch 8. The lower guide block 7 has an inclined surface. When stamping to the bottom, the inclined surface is connected to the side wall of the punch through-hole, so that the oblique punch 2 always travels in an accurate direction;

[0034] When the mold is closed, the stripper plate 5 first presses on the product, and the oblique punch 2 travels along the punch through-hole. The lower end of the inward concave R corner 21 contacts the product until the bent section of the product is attached to the outward convex R corner 81;

[0035] When the mold is opened, the oblique punch 2 first retracts, disengaging from the R corner of the product, and then the stripper plate 5 retracts to take out the product.

[0036] The beneficial effects of the large R corner oblique punching and bending die for the air box outer box of the present utility model are as follows:

[0037] 1. An oblique punch with an inward concave R corner is provided, which cooperates with the lower bending punch with an outward convex R corner to realize the R corner bending of the product. The return spring is used to disengage the punch from the product, and the guide plate and the lower guide block are used to ensure the stability of the punch structure, realizing precise guidance throughout the process, and greatly improving the bending accuracy;

[0038] 2. The structure is relatively simple and concise, suitable for R corner bending of various thin plates or thick plates, and has a wide application range.

[0039] The above are only the embodiments of the present utility model, and do not limit the patent scope of the present utility model accordingly. Any equivalent structure or equivalent process transformation made by using the description and drawings of the present utility model, or directly or indirectly applied in other related technical fields, shall be similarly included in the patent protection scope of the present utility model.

Claims

1. The large R-angle oblique punching and bending die for the outer box of the air box, characterized in that Including: An inclined punch, a guide plate, a stop plate, a stripper plate, a lower bending punch and a lower template; The inclined punch is fixedly connected to the upper die base, and its lower end has an inner concave R corner; The stripper plate is connected to the upper die base through an elastic structure. The guide plate and the stop plate are arranged on the upper surface of the stripper plate and move up and down with the stripper plate; The guide plate and the stripper plate are provided with punch through holes. The inclined punch is located in the punch through holes, and a return spring is arranged on one side thereof. The lower end of the return spring abuts against the stripper plate. The lower bending punch and the lower template are fixedly arranged on the lower die base. The upper end of the lower bending punch has an outer convex R corner, which cooperates with the inner concave R corner to bend and form the product.

2. The large R-angle oblique punching and bending die for the outer box of the air box according to claim 1, wherein, The inclined punch is fixed to the upper die base through a mounting seat.

3. The large R - angle oblique punching and bending die for the outer box of the air box, according to claim 2, is characterized in that, The guide plate is further provided with a spring through hole and a limit groove. When stamping reaches the bottom, the return spring is compressed, and the mounting seat abuts against the limit groove.

4. The large R-angle oblique punching and bending die for the outer box of the air box according to any one of claims 1-3, characterized in that The lower die base is further provided with a lower guide block, and the lower guide block has an inclined surface. When stamping reaches the bottom, the inclined surface is connected to the side wall of the punch through hole.

5. The large R-angle oblique punching and bending die for the outer box of the air box according to any one of claims 1-3, characterized in that, A guide post is further arranged between the stripper plate and the upper die base.

6. The large R-angle oblique punching and bending die for the outer box of the air box according to claim 5, characterized in that, The lower die base is further provided with a lower guide block, and the lower guide block has an inclined surface. When stamping reaches the bottom, the inclined surface is connected to the side wall of the punch through hole.

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