Aluminum alloy plate superplastic stretching integrated forming die

Abstract

The utility model relates to the technical field of aluminum alloy machining, and discloses an aluminum alloy plate superplastic stretching integrated forming die which comprises a lower die body and an upper die body used in cooperation with the lower die body. The two same heating structures are symmetrically arranged on the two sides of the upper die body, each heating structure comprises a conducting rod, an insulating sleeve, a connecting base and a sheath, the insulating sleeves are fixedly connected with the connecting bases, the connecting bases are elastically connected with the upper die body, the conducting rods are in threaded connection with the insulating sleeves, and the sheaths capable of shielding and protecting the conducting rods are arranged outside the insulating sleeves. The protective sleeve is elastically connected with the insulating sleeve, when the upper die body moves downwards to shape a plate, the conductive rod can abut against the plate, the electrified plate can emit heat to facilitate shaping, meanwhile, tearing of the plate can be restrained, and through the elastically-connected protective sleeve, after the upper die body and the lower die body are separated, the protective sleeve moves downwards to enable the lower end of the conductive rod to be stored in the abdomen, and therefore the plate can be conveniently shaped. The plate can be automatically connected with or disconnected from a power supply, the production efficiency is improved, and the workload is reduced.

Description

Technical Field

[0001] This utility model relates to the field of aluminum alloy processing technology, and in particular to an integrated forming mold for superplastic stretching of aluminum alloy plates. Background Technology

[0002] Aluminum alloy sheets are aluminum profiles made primarily from aluminum, with the addition of metals such as copper, magnesium, and zinc. Compared to traditional aluminum sheets, aluminum alloy sheets retain their lightweight characteristics while exhibiting significantly improved mechanical properties. This broadens the application range of aluminum alloy sheets, and they are widely used for aluminum alloy skins in the front of railcars.

[0003] Existing technology discloses a complex aluminum alloy sheet superplastic stretching integrated forming mold (Publication No.: CN115971342A). It includes an upper mold and a lower mold, as well as a pressing mechanism and a stretching, flanging, and punching mechanism disposed on the upper and lower molds. This invention provides a complex aluminum alloy sheet superplastic stretching integrated forming mold. By adding a pressing mechanism to the upper and lower molds, the aluminum alloy sheet is fixed during the forming process. Through the combination of the stretching, flanging, and punching mechanism and the leveling mechanism, the forming mold provided by this invention can complete the forming, stretching, and punching processes in one operation, thereby reducing production costs and improving work efficiency.

[0004] In the existing technology, the forming process of the sheet is achieved by using a mold. In order to improve the ductility of the sheet during the forming stage, the sheet is heated by electricity to reduce the probability of tearing. The existing technology uses an electric clamp to connect the sheet to the power source. The electric clamp needs to be loosened once for each sheet processed, which makes the process operation cumbersome and limits the production efficiency.

[0005] Therefore, we propose an integrated superplastic stretching forming mold for aluminum alloy plates. Utility Model Content

[0006] The present invention mainly solves the technical problem of inconvenience in connecting the plate to the power supply, and provides an integrated forming mold for superplastic stretching of aluminum alloy plate.

[0007] To achieve the above objectives, this utility model adopts the following technical solution: an aluminum alloy plate superplastic stretching integral forming mold, comprising:

[0008] The lower mold body and the upper mold body are used in conjunction with each other. The top of the lower mold body is provided with a molding cavity, and the bottom of the upper mold body is provided with an integrally formed protrusion.

[0009] A heating structure is installed on the side wall of the upper mold body for electrically heating the plate. Two identical heating structures are symmetrically arranged on both sides of the upper mold body. The heating structure includes a conductive rod, an insulating sleeve, a connecting seat, and a protective sleeve. The insulating sleeve is fixedly connected to the connecting seat, and the connecting seat is elastically connected to the upper mold body. The conductive rod is threadedly connected to the insulating sleeve. The outside of the insulating sleeve is provided with a protective sleeve that can shield and protect the conductive rod. The protective sleeve is elastically connected to the insulating sleeve.

[0010] In a preferred embodiment of this utility model, the heating structure further includes a guide rod, a push plate, and a spring. The guide rod is fixedly connected to the sheath and slidably connected to the connecting seat. The push plate is fixedly connected to the lower mold body. One end of the spring is fixedly connected to the sheath, and the other end of the spring is fixedly connected to the connecting seat.

[0011] In a preferred embodiment of this utility model, the insulating sleeve forms a circular tube structure, the inner wall of the insulating sleeve is threaded, the conductive rod is threadedly connected to the inner wall of the insulating sleeve, and a terminal is fixedly provided on the top of the conductive rod.

[0012] In a preferred embodiment of this utility model, the sheath forms a circular tube structure and is slidably disposed on the outer wall of the insulating sleeve. The outer wall of the sheath is provided with an integrally formed ear plate. The spring and the guide rod are both fixed on the top of the ear plate. The guide rod forms a rectangular rod body. A rectangular groove is opened on the top of the connecting seat, and the guide rod is slidably disposed in the rectangular groove.

[0013] In a preferred embodiment of this utility model, the spring forms an arc-shaped rod structure, and the push plate is located below the ear plate. The push plate can abut against the ear plate and compress the spring to bend and deform.

[0014] In a preferred embodiment of this utility model, the heating structure further includes a guide plate and a slider. The guide plate is fixedly connected to the upper mold body, and the slider is fixedly connected to the connecting seat and elastically connected to the guide plate.

[0015] In a preferred embodiment of this utility model, the slider is formed into a dovetail-shaped block, a groove is provided on the top of the guide plate, the slider is slidably disposed in the groove, and a spring is fixedly installed on the top surface of the slider. The spring is located in the groove and pushes the slider downward.

[0016] Beneficial effects

[0017] This utility model provides a superplastic stretching integral forming mold for aluminum alloy plates. It has the following beneficial effects:

[0018] 1. This aluminum alloy sheet superplastic stretching integrated forming mold has two sets of heating structures on both sides of the upper mold body. By connecting two conductive rods to the positive and negative terminals of the power supply, when the upper mold body moves down to shape the sheet, the conductive rods will contact the sheet. The sheet heated by the power supply can be easily shaped, and at the same time, it can also prevent the sheet from tearing. Through the elastically connected protective sleeve, after the upper mold body and the lower mold body are separated, the protective sleeve moves down to retract the lower end of the conductive rod into the sleeve, reducing the probability of accidents caused by the energized conductive rod. It has the characteristics of convenient use and excellent protective performance. It can automatically connect or disconnect the power supply to the sheet, improve production efficiency and reduce workload.

[0019] 2. This aluminum alloy sheet superplastic stretching integrated forming mold, by setting a push plate, when the upper mold body descends, the push plate contacts the ear plate on the side wall of the sheath, the ear plate pushes the spring plate to deform and bend, the sheath drives the guide rod to slide upward in the rectangular groove, and then the sheath moves upward to expose the conductive rod. After the upper mold body and the lower mold body separate, the spring plate resets and pushes the ear plate to make the sheath move downward, and the conductive rod is retracted into the belly of the sheath to achieve protection. It can adjust the position of the sheath by itself, continuously shape the sheet, has high efficiency and does not require manual intervention.

[0020] 3. This aluminum alloy plate superplastic stretching integrated forming mold, by setting a slider, has an end cap on the top of the guide plate. The end cap is locked to the guide plate by bolts. The upper end of the spring is restricted by the end cap. When the spring is compressed, it pushes the guide plate to move down in the slide groove, thereby causing the connecting seat to move down as a whole. This ensures that the lower end of the conductive rod can always keep in contact with the top of the plate, ensuring the stability of the electrical connection, and at the same time compensating for the gaps caused by repeated contact wear of the conductive rod. Attached Figure Description

[0021] Figure 1 This is one of the overall perspective views of this utility model;

[0022] Figure 2 This is a partial sectional view of the lower mold body of this utility model;

[0023] Figure 3 This is one of the three-dimensional views of the heating structure of this utility model;

[0024] Figure 4 This is the second perspective view of the heating structure of this utility model;

[0025] Figure 5 This is a schematic diagram of the slider mounting on the connector of this utility model.

[0026] Legend: 10. Lower mold body; 11. Upper mold body; 20. Conductive rod; 21. Insulating sleeve; 22. Connecting seat; 23. Sheath; 24. Guide rod; 25. Push plate; 26. Spring; 30. Guide plate; 31. Slider. Detailed Implementation

[0027] A type of aluminum alloy sheet superplastic stretching integral forming mold, such as Figure 1 and Figure 2 As shown, it includes:

[0028] The lower mold body 10 and the upper mold body 11 cooperate with each other. The top of the lower mold body 10 is provided with a forming cavity, and the bottom of the upper mold body 11 is provided with an integrally formed protrusion. In this solution, the lower mold body 10 is fixedly mounted on the frame, and a push cylinder is fixedly mounted on the frame. The upper mold body 11 is fixedly connected to the output shaft of the push cylinder. The push cylinder pushes the upper mold body 11 close to the lower mold body 10 to extrude the sheet material placed on the top of the lower mold body 10. Of course, a punch can also be provided at the bottom of the upper mold body 11, and a punch can be provided on the bottom surface of the lower mold body 10. The workpiece is punched during the forming stage to achieve integral forming. This will not be elaborated here.

[0029] like Figure 2 , Figure 3 and Figure 4 As shown, a heating structure is installed on the side wall of the upper mold body 11 for electrically heating the plate. Two identical heating structures are symmetrically arranged on both sides of the upper mold body 11. The heating structure includes a conductive rod 20, an insulating sleeve 21, a connecting seat 22, and a protective sleeve 23. The insulating sleeve 21 is fixedly connected to the connecting seat 22, and the connecting seat 22 is elastically connected to the upper mold body 11. The conductive rod 20 is threadedly connected to the insulating sleeve 21. The outer side of the insulating sleeve 21 is provided with a protective sleeve 23 that can shield and protect the conductive rod 20. The protective sleeve 23 is elastically connected to the insulating sleeve 21. The insulating sleeve 21 forms a circular tube structure. The inner wall of the insulating sleeve 21 is threaded. The conductive rod 20 is threadedly connected to the inner wall of the insulating sleeve 21. A terminal is fixedly provided on the top of the conductive rod 20.

[0030] In this design, two sets of heating structures are set on both sides of the upper mold body 11. By connecting the two conductive rods 20 to the positive and negative terminals of the power supply, when the upper mold body 11 moves down to shape the sheet, the conductive rods 20 will contact the sheet. The sheet after being energized can heat up, thus facilitating shaping and inhibiting tearing of the sheet. Through the elastically connected sheath 23, after the upper mold body 11 and the lower mold body 10 are separated, the sheath 23 moves down to retract the lower end of the conductive rod 20 into its belly, reducing the probability of accidents caused by the energized conductive rod 20. It has the characteristics of convenient use and excellent protective performance.

[0031] like Figure 3As shown, the heating structure also includes a guide rod 24, a push plate 25, and a spring 26. The guide rod 24 is fixedly connected to the sheath 23 and slidably connected to the connecting seat 22. The push plate 25 is fixedly connected to the lower mold body 10. One end of the spring 26 is fixedly connected to the sheath 23, and the other end of the spring 26 is fixedly connected to the connecting seat 22. The sheath 23 forms a circular tube structure and is slidably disposed on the outer wall of the insulating sleeve 21. The outer wall of the sheath 23 is provided with an integrally formed ear plate. The spring 26 and the guide rod 24 are both fixed on the top of the ear plate. The guide rod 24 forms a rectangular rod. A rectangular groove is opened on the top of the connecting seat 22, and the guide rod 24 is slidably disposed in the rectangular groove. The spring 26 forms an arc-shaped rod structure. The push plate 25 is located below the ear plate and can abut against the ear plate and squeeze the spring 26 to bend and deform.

[0032] As a supplement to the above solution, in order to achieve automatic displacement of the sheath 23 during the shaping stage and allow the conductive rod 20 to protrude and contact the plate, a push plate 25 is set. When the upper mold body 11 descends, the push plate 25 contacts the ear plate on the side wall of the sheath 23. The ear plate pushes the spring 26 to deform and bend. The sheath 23 drives the guide rod 24 to slide upward in the rectangular groove. Then the sheath 23 moves upward and exposes the conductive rod 20. After the upper mold body 11 separates from the lower mold body 10, the spring 26 resets and pushes the ear plate to make the sheath 23 move downward. The conductive rod 20 is retracted into the belly of the sheath 23 for protection. It can adjust the position of the sheath 23 by itself, continuously shape the plate, is highly efficient, and does not require manual intervention.

[0033] like Figure 3 and Figure 5 As shown, the heating structure also includes a guide plate 30 and a slider 31. The guide plate 30 is fixedly connected to the upper mold body 11, and the slider 31 is fixedly connected to the connecting seat 22 and elastically connected to the guide plate 30. The slider 31 forms a dovetail-shaped block. A groove is provided on the top of the guide plate 30. The slider 31 is slidably disposed in the groove. A spring is fixedly installed on the top surface of the slider 31. The spring is located in the groove and pushes the slider 31 downward. By setting the slider 31, an end cap is provided on the top of the guide plate 30. The end cap is locked to the guide plate 30 by bolts. The upper end of the spring is restricted by the end cap. The spring is squeezed and pushes the guide plate 30 downward in the groove, thereby causing the connecting seat 22 to move downward as a whole. This ensures that the lower end of the conductive rod 20 can always keep in contact with the top of the plate, ensuring the stability of the electrical connection, and at the same time compensating for the gap caused by repeated contact wear of the conductive rod 20.

[0034] The working principle of this utility model is as follows: It should be noted that this solution is applicable to the production of electric vehicle skins. The molding cavity mainly refers to the shapes of different areas of the front of the vehicle. By connecting the two conductive rods 20 to the positive and negative terminals of the power supply, when the upper mold 11 moves downward to shape the sheet metal, the push plate 25 contacts the ear plate on the side wall of the sheath 23. The ear plate pushes the spring 26 to deform and bend. The sheath 23 drives the guide rod 24 to slide upward within the rectangular groove. Then, the sheath 23 moves upward, exposing the conductive rod 20. After the upper mold 11 separates from the lower mold 10, the spring 26... The reset push-pull ear plate causes the sheath 23 to move downward, and the conductive rod 20 is retracted into the belly of the sheath 23 for protection. The top of the guide plate 30 is provided with an end cap, which is locked to the guide plate 30 by bolts. The end cap restricts the upper end of the spring. The spring is compressed and pushes the guide plate 30 to move downward in the slide groove, thereby causing the connecting seat 22 to move downward as a whole. This ensures that the lower end of the conductive rod 20 can always keep in contact with the top of the plate, ensuring the stability of the electrical connection. By energizing the plate that needs to be shaped, it is heated, which facilitates shaping and prevents tearing.

[0035] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A superplastic stretching integral forming mold for aluminum alloy plates, characterized in that, include: The lower mold body (10) and the upper mold body (11) are used in conjunction with each other. The top of the lower mold body (10) is provided with a molding cavity, and the bottom of the upper mold body (11) is provided with an integrally formed protrusion. A heating structure is provided on the side wall of the upper mold body (11) for heating the plate by electricity. Two identical heating structures are symmetrically arranged on both sides of the upper mold body (11). The heating structure includes a conductive rod (20), an insulating sleeve (21), a connecting seat (22), and a protective sleeve (23). The insulating sleeve (21) is fixedly connected to the connecting seat (22), and the connecting seat (22) is elastically connected to the upper mold body (11). The conductive rod (20) is threadedly connected to the insulating sleeve (21). The outer side of the insulating sleeve (21) is provided with a protective sleeve (23) that can shield and protect the conductive rod (20). The protective sleeve (23) is elastically connected to the insulating sleeve (21).

2. The aluminum alloy plate superplastic stretching integral forming mold according to claim 1, characterized in that: The heating structure also includes a guide rod (24), a push plate (25), and a spring (26). The guide rod (24) is fixedly connected to the sheath (23) and slidably connected to the connecting seat (22). The push plate (25) is fixedly connected to the lower mold body (10). One end of the spring (26) is fixedly connected to the sheath (23), and the other end of the spring (26) is fixedly connected to the connecting seat (22).

3. The aluminum alloy plate superplastic stretching integral forming mold according to claim 1, characterized in that: The insulating sleeve (21) forms a circular tube structure. The inner wall of the insulating sleeve (21) is threaded. The conductive rod (20) is threadedly connected to the inner wall of the insulating sleeve (21). A terminal is fixedly provided on the top of the conductive rod (20).

4. The aluminum alloy plate superplastic stretching integral forming mold according to claim 2, characterized in that: The sheath (23) forms a circular tube structure and is slidably disposed on the outer wall of the insulating sleeve (21). The outer wall of the sheath (23) is provided with an integrally formed ear plate. The spring (26) and the guide rod (24) are both fixed on the top of the ear plate. The guide rod (24) forms a rectangular rod body. The top of the connecting seat (22) is provided with a rectangular groove, and the guide rod (24) is slidably disposed in the rectangular groove.

5. The aluminum alloy plate superplastic stretching integral forming mold according to claim 2, characterized in that: The spring (26) forms an arc-shaped rod structure, and the push plate (25) is located below the ear plate. The push plate (25) can abut against the ear plate and squeeze the spring (26) to bend and deform.

6. The aluminum alloy plate superplastic stretching integral forming mold according to claim 1, characterized in that: The heating structure also includes a guide plate (30) and a slider (31). The guide plate (30) is fixedly connected to the upper mold body (11), and the slider (31) is fixedly connected to the connecting seat (22) and elastically connected to the guide plate (30).

7. The aluminum alloy plate superplastic stretching integral forming mold according to claim 6, characterized in that: The slider (31) is formed into a dovetail shape. A groove is provided on the top of the guide plate (30). The slider (31) is slidably disposed in the groove. A spring is fixedly installed on the top surface of the slider (31). The spring is located in the groove and pushes the slider (31) downward.

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