Superplastic forming die for aluminum alloy plate

Abstract

The utility model relates to the technical field of aluminum alloy machining, and discloses an aluminum alloy plate superplastic forming die which comprises a lower die body and an upper die body which are used in cooperation. The conductive structure comprises storage boxes, overturning plates and contact rods, the two storage boxes are fixedly arranged on the two sides of the lower die body, the overturning plates capable of being overturned and stored in cavities of the storage boxes are movably arranged in the storage boxes respectively, the contact rods are elastically arranged at the tops of the overturning plates respectively, and the two contact rods are connected with the positive electrode and the negative electrode of a power source respectively. The overturning plate is pressed downwards through the plate, so that the overturning plate is overturned to be in the horizontal state from the inclined state, the contact rod is overturned out of the containing box along with the overturning plate, the elastically-connected contact rod abuts against the bottom of the plate, connection between the plate and a power source is achieved, and after the plate is separated from the lower die body, the overturning plate is overturned to enter a cavity of the containing box under the action of gravity; the device has the characteristics of convenient power supply connection and safe use.

Description

TECHNICAL FIELD

[0001] The utility model relates to aluminum alloy processing technical field especially relates to a kind of aluminum alloy sheet superplastic forming mould. BACKGROUND

[0002] Superplasticity refers to the phenomenon that metal material shows extremely low deformation resistance and super uniform plastic deformation capacity before breaking under specific internal conditions and external environment, which is also commonly used in aluminum alloy sheet forming process.

[0003] Prior art discloses a kind to be electrically conducted to aluminum alloy sheet superplastic forming mould and forming method (publication number: CN118237483A), it is related to the processing technical field of aluminum alloy.It includes lifting mechanism, the upper die with hot tensile rigid punch and the lower die with female die cavity;Lifting mechanism is used to drive the upper die to move along the opposite direction with the lower die, to realize the clamping or unclamping of the upper die and the lower die;Lower die bears aluminum alloy sheet, and the both ends of the aluminum alloy sheet are clamped with at least one electrode clamp plate, and the electrode clamp plate is communicated with external power supply system to heat the aluminum alloy sheet.

[0004] In prior art, the sheet to be shaped is powered on by connecting the contact wire and the electrode clamp plate to the power supply, and after the sheet is formed, the electrode clamp needs to be loosened, and another unformed sheet is placed and then the electrode clamp is fixed again.This process makes it inconvenient to connect and disconnect the power supply, limits the production efficiency and increases the workload.

[0005] Therefore, we propose a kind to be electrically conducted to aluminum alloy sheet superplastic forming mould. CONTENT OF UTILITY MODEL

[0006] The utility model mainly solves the technical problem of the above-mentioned inconvenient power connection and disconnection, and provides a kind to be electrically conducted to aluminum alloy sheet superplastic forming mould.

[0007] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme, a kind to be electrically conducted to aluminum alloy sheet superplastic forming mould, comprising:

[0008] The lower die body and the upper die body are used in cooperation, the top surface of the lower die body forms a forming cavity, and the bottom of the upper die body is fixed with a protrusion for extrusion;

[0009] The conductive structure is arranged on both sides of the lower die body for electric heating of the sheet, and the conductive structure comprises a storage box, a turnover plate and a contact rod, two storage boxes are fixedly arranged on both sides of the lower die body, one turnover plate that can be turned over and stored in the storage box cavity is movably arranged in each storage box, one contact rod is elastically arranged on the top of each turnover plate, and the two contact rods are connected with the positive and negative poles of the power supply, respectively, and the upper die body can press down the turnover plate when it is close to the lower die body, so that the contact rod is turned out from the storage box and contacts the sheet.

[0010] In a preferred embodiment of this utility model, the storage box forms a hollow rectangular box structure, with the top of the storage box sealed and the bottom open. The top of the storage box has a slot for a flip plate, and the flip plate is rotatably positioned in the slot.

[0011] In a preferred embodiment of this utility model, the upper end face of the lower mold body is provided with a notch adapted to the flipping plate, the flipping plate extends into the notch, and when the upper mold body contacts the lower mold body, the flipping plate is pressed down so that the flipping plate remains flush with the top surface of the lower mold body.

[0012] In a preferred embodiment of this utility model, the conductive structure further includes a sleeve, an adjusting tube, a connecting rod, and a spring. The sleeve is fixedly connected to the flip plate and has a cavity. The adjusting tube is threadedly connected to the sleeve, and the connecting rod is rotatably connected to the adjusting tube. The contact rod is slidably disposed within the cavity of the sleeve, and a spring is disposed between the contact rod and the connecting rod.

[0013] In a preferred embodiment of this utility model, the sleeve forms a cylindrical structure, and an installation hole is provided through the top surface of the flip plate, with the sleeve fixedly installed inside the installation hole.

[0014] In a preferred embodiment of this utility model, the inner wall of the sleeve is threaded, the outer wall of the adjusting tube is threaded, the adjusting tube is threaded to the inner wall of the sleeve, the connecting rod is rotatably disposed at the end of the adjusting tube, and the bottom of the connecting rod is provided with a connecting hole for wiring.

[0015] In a preferred embodiment of this utility model, the upper end face of the sleeve is provided with an outlet, and the bottom of the contact rod is provided with an integrally formed baffle. The baffle is adapted to the sleeve and slidably connected to the sleeve, and the contact rod passes through the outlet and slides within the outlet.

[0016] Beneficial effects

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

[0018] 1. This aluminum alloy sheet superplastic forming mold uses a sheet pressing down on a flipping plate, causing the flipping plate to flip from an inclined state to a horizontal state. A contact rod flips out from inside a storage box along with the flipping plate, and the elastically connected contact rod contacts the bottom of the sheet, connecting the sheet to a power source. After the sheet separates from the lower mold body, the flipping plate flips under gravity and enters the storage box cavity, where the contact rod is stored, reducing the probability of electric shock. The connection point between the flipping plate and the storage box is close to the lower mold body, and the contact rod is installed away from the flipping plate's rotation connection point. This allows the contact rod and flipping plate to flip and reset under gravity, providing convenient power connection and safe use.

[0019] 2. This aluminum alloy sheet superplastic forming mold uses a spring to push a contact rod upward within a sleeve. The graphite contact rod has good conductivity. Combined with the spring's pushing action on the contact rod, the contact rod can maintain good contact with the sheet. At the same time, even if the end of the contact rod repeatedly contacts the sheet and wears down, the elastic connection can compensate for the gaps caused by wear.

[0020] 3. This aluminum alloy sheet superplastic forming mold, by rotating the adjusting tube, pushes the connecting rod upward within the sleeve. The connecting rod compresses the spring, and the spring's thrust on the contact rod can be adjusted. The spring's preload value can be adjusted according to actual usage, making the contact force between the contact rod and the sheet more flexible. The wiring hole at the bottom of the connecting rod can be fixed to the wire's terminal with a screw, facilitating wire connection. When the contact rod wears down to the baffle position, the adjusting tube and connecting rod can be removed to replace the new contact rod, facilitating later maintenance. 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 A perspective view of the conductive structure installed on the lower mold body of this utility model;

[0024] Figure 4 This is a three-dimensional view of the conductive structure of this utility model;

[0025] Figure 5 This is a partial cross-sectional view of the sleeve of this utility model.

[0026] Legend: 10. Lower mold body; 11. Upper mold body; 20. Storage box; 21. Flip plate; 22. Contact rod; 23. Sleeve; 24. Adjusting tube; 25. Connecting rod; 26. Spring. Detailed Implementation

[0027] A superplastic forming die for aluminum alloy sheets, such as Figure 1 and Figure 2 As shown, it includes:

[0028] The lower mold 10 and upper mold 11 are used in cooperation with each other. The top surface of the lower mold 10 forms a molding cavity, and the bottom of the upper mold 11 is fixedly provided with a protrusion for extrusion. In this solution, the lower mold 10 and upper mold 11 need to be used with a frame. A push cylinder is fixedly installed on the frame, and the upper mold 11 is fixedly installed on the output shaft of the push cylinder. The upper mold 11 is fixedly installed on the frame, and a guide rod is also fixedly provided on the top of the lower mold 10. The guide rod is slidably connected to the upper mold 11. The sheet material placed on the top of the lower mold 10 is extruded and formed by the upper mold 11 approaching the lower mold 10. This is a known prior art and will not be described in detail here.

[0029] like Figure 3 , Figure 4 A conductive structure, located on both sides of the lower mold body 10, is used to electrically heat the sheet material. The conductive structure includes a storage box 20, a flip plate 21, and contact rods 22. Two storage boxes 20 are fixedly installed on both sides of the lower mold body 10. Each storage box 20 contains a flip plate 21 that can be flipped and stored inside the cavity of the storage box 20. Each flip plate 21 has a contact rod 22 elastically installed on its top. The two contact rods 22 are respectively connected to the positive and negative terminals of the power supply. When the upper mold body 11 approaches the lower mold body 10, it can be pressed down and flipped. Plate 21 causes contact rod 22 to flip out from storage box 20 and contact plate. Storage box 20 forms a hollow rectangular box structure. The top of storage box 20 is sealed and the bottom is open. The top of storage box 20 is provided with a slot adapted to flip plate 21. Flip plate 21 is rotatably set in the slot. The upper end face of lower mold body 10 is provided with a notch adapted to flip plate 21. Flip plate 21 extends into the notch. When upper mold body 11 contacts lower mold body 10, it presses down flip plate 21 so that flip plate 21 remains flush with the top surface of lower mold body 10.

[0030] In this solution, considering that in the existing technology, the sheet material needs to be electrically heated during molding to facilitate forming, the existing technology uses wires to connect the power supply and the sheet material to achieve heating. After processing, the wires need to be removed and another sheet material needs to be connected, which is inconvenient. To improve the above defects, two contact rods 22 are set. The two contact rods 22 are connected to the positive and negative terminals of the power supply via wires. When the upper mold body 11 approaches the lower mold body 10 to press the sheet material, the sheet material presses down on the flipping plate 21, causing the flipping plate 21 to flip from an inclined state to a horizontal state. The contact rods 22 flip along with the plate. The rotating plate 21 flips out from inside the storage box 20 and contacts the bottom of the plate through the elastically connected contact rod 22, thus connecting the plate to the power supply. After the plate separates from the lower mold body 10, the rotating plate 21 flips into the cavity of the storage box 20 under the action of gravity, and the contact rod 22 is stored in the cavity of the storage box 20, reducing the probability of electric shock. The connection point between the rotating plate 21 and the storage box 20 is close to the lower mold body 10, and the contact rod 22 is installed at a position away from the rotation connection point of the rotating plate 21. Thus, the contact rod 22 and the rotating plate 21 can flip and reset under the action of gravity, which has the characteristics of convenient power connection and safe use.

[0031] like Figure 5 As shown, the conductive structure also includes a sleeve 23, an adjusting tube 24, a connecting rod 25, and a spring 26. The sleeve 23 is fixedly connected to the flip plate 21 and has a cavity. The adjusting tube 24 is threadedly connected to the sleeve 23, and the connecting rod 25 is rotatably connected to the adjusting tube 24. The contact rod 22 is slidably disposed in the cavity of the sleeve 23. The spring 26 is disposed between the contact rod 22 and the connecting rod 25. The sleeve 23 forms a cylindrical structure. The top surface of the flip plate 21 has a through-hole for mounting. The sleeve 23 is fixedly disposed in the mounting hole. The inner wall of the sleeve 23 has a thread. The outer wall of the adjusting tube 24 has thread teeth. The adjusting tube 24 is threadedly connected to the inner wall of the sleeve 23. The connecting rod 25 is rotatably disposed at the end of the adjusting tube 24. The bottom of the connecting rod 25 has a wiring hole for wiring. The upper end face of the sleeve 23 has an outlet. The bottom of the contact rod 22 has an integrally formed baffle. The baffle is adapted to the sleeve 23 and slidably connected to the sleeve 23. The contact rod 22 passes through the outlet and slides in the outlet.

[0032] In this solution, as a supplement to the above solution, in order to ensure the stability of the contact rod 22 in contact with the plate and thus improve the stability of the electrical connection, the contact rod 22 is pushed upward in the sleeve 23 by the spring 26. The graphite contact rod 22 has good conductivity. With the spring 26 pushing the contact rod 22, the contact rod 22 can maintain a good contact effect with the plate. At the same time, even if the end of the contact rod 22 repeatedly contacts the plate and wears, the elastic connection can make up for the gap caused by wear.

[0033] By rotating the adjusting tube 24, the adjusting tube 24 pushes the connecting rod 25 upward within the sleeve 23. The connecting rod 25 compresses the spring 26, and the pushing force of the spring 26 on the contact rod 22 can be adjusted. The preload value of the spring 26 can be adjusted according to the actual usage, making the adjustment of the contact force between the contact rod 22 and the plate more flexible. The wiring hole at the bottom of the connecting rod 25 can be fixed to the wiring end of the wire with the connecting rod 25 by screws, which is convenient for connecting the wire to the connecting rod 25. When the contact rod 22 is worn to the baffle position, the adjusting tube 24 and the connecting rod 25 can be removed and a new contact rod 22 can be replaced, which is convenient for later maintenance.

[0034] The working principle of this utility model is as follows: The wiring hole at the bottom of the 25 can be used to fix the wire terminal to the wiring rod 25 with screws. The contact rod 22 is pushed upward in the sleeve 23 by the spring 26. The graphite contact rod 22 has good conductivity. With the spring 26 pushing the contact rod 22, the plate presses down on the flip plate 21, so that the flip plate 21 flips from the inclined state to the horizontal state. The contact rod 22 flips out from the inside of the storage box 20 along with the flip plate 21. The contact rod 22, which is elastically connected, abuts against the bottom of the plate, realizing the connection between the plate and the power supply. Rotating the adjusting tube 24 pushes the wiring rod 25 upward in the sleeve 23. The wiring rod 25 squeezes the spring 26, and the pushing force of the spring 26 on the contact rod 22 is adjusted. After the plate is separated from the lower mold body 10, the flip plate 21 flips into the cavity of the storage box 20 under the action of gravity. Then the contact rod 22 is stored in the cavity of the storage box 20, which can realize the automatic connection and disconnection of the plate.

[0035] It should be noted that the terminal rod 25 is made of conductive metal, while the sleeve 23 and the adjusting tube 24 are made of insulating plastic. A copper wire connects the contact rod 22 and the terminal rod 25, forming a redundant section to ensure the electrical connection between the contact rod 22 and the terminal rod 25.

[0036] 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 forming mold for aluminum alloy sheets, characterized in that, include: The lower mold (10) and the upper mold (11) are used in cooperation with each other. The top surface of the lower mold (10) forms a molding cavity, and the bottom of the upper mold (11) is fixedly provided with a protrusion for extrusion. A conductive structure is provided on both sides of the lower mold body (10) for heating the plate material by electricity. The conductive structure includes a storage box (20), a flip plate (21), and a contact rod (22). Two storage boxes (20) are fixedly provided on both sides of the lower mold body (10). A flip plate (21) that can be flipped and stored in the cavity of the storage box (20) is movably provided in each storage box (20). A contact rod (22) is elastically provided on the top of each flip plate (21). The two contact rods (22) are respectively connected to the positive and negative poles of the power supply. When the upper mold body (11) approaches the lower mold body (10), it can press down the flip plate (21) so that the contact rod (22) flips out from the storage box (20) and touches the plate material.

2. The aluminum alloy sheet superplastic forming mold according to claim 1, characterized in that: The storage box (20) forms a hollow rectangular box structure. The top of the storage box (20) is sealed and the bottom is open. The top of the storage box (20) is provided with a slot for the flip plate (21), and the flip plate (21) is rotatably set in the slot.

3. The aluminum alloy sheet superplastic forming mold according to claim 1, characterized in that: The upper end face of the lower mold body (10) is provided with a notch adapted to the flip plate (21). The flip plate (21) extends into the notch. When the upper mold body (11) contacts the lower mold body (10), it presses down the flip plate (21) so that the flip plate (21) remains flush with the top surface of the lower mold body (10).

4. The aluminum alloy sheet superplastic forming mold according to claim 1, characterized in that: The conductive structure also includes a sleeve (23), an adjusting tube (24), a connecting rod (25), and a spring (26). The sleeve (23) is fixedly connected to the flip plate (21) and has a cavity. The adjusting tube (24) is threadedly connected to the sleeve (23). The connecting rod (25) is rotatably connected to the adjusting tube (24). The contact rod (22) is slidably disposed in the cavity of the sleeve (23). A spring (26) is disposed between the contact rod (22) and the connecting rod (25).

5. The aluminum alloy sheet superplastic forming mold according to claim 4, characterized in that: The sleeve (23) forms a cylindrical structure, and the top surface of the flip plate (21) is provided with an installation hole, and the sleeve (23) is fixedly installed in the installation hole.

6. The aluminum alloy sheet superplastic forming mold according to claim 4, characterized in that: The inner wall of the sleeve (23) is threaded, the outer wall of the adjusting tube (24) is threaded, the adjusting tube (24) is threaded to the inner wall of the sleeve (23), the connecting rod (25) is rotatably disposed at the end of the adjusting tube (24), and the bottom of the connecting rod (25) is provided with a connecting hole for wiring.

7. The aluminum alloy sheet superplastic forming mold according to claim 4, characterized in that: The upper end face of the sleeve (23) is provided with an outlet, and the bottom of the contact rod (22) is provided with an integrally formed baffle. The baffle is adapted to the sleeve (23) and is slidably connected to the sleeve (23). The contact rod (22) passes through the outlet and slides in the outlet.

Images