Automobile door forming tool

Abstract

The utility model discloses an automobile door forming tool, and relates to the technical field of automobile door production. The automobile door forming tool comprises a bottom plate, a bottom die is fixedly installed above the bottom plate, correction mechanisms are fixedly installed on the periphery of the bottom die and used for adjusting the position of a steel plate, and a heat dissipation mechanism is fixedly installed above the bottom plate and used for rapidly reducing the temperature of the bottom die. A limiting rod is fixedly installed on the outer side of the transmission shaft, a refrigerant enters a backflow pipe after being cooled and moves to the part, located in the bottom die, of the backflow pipe, the refrigerant evaporates and absorbs heat of the bottom die, the bottom die is rapidly cooled, and the pressure stabilizing chamber can prevent the situation that after a cooling medium expands, air pressure in the backflow pipe exceeds the bearing limit; evaporated refrigerants can flow back into the pressure stabilizing chamber through the backflow pipe to form circulation, heat transmitted to the bottom die by the steel plate is rapidly absorbed through phase change of the refrigerants, and therefore the heat dissipation performance is improved.

Description

Technical Field

[0001] This utility model relates to the field of automobile door manufacturing technology, specifically to an automobile door forming tooling. Background Technology

[0002] Car doors provide access for drivers and passengers, isolate them from external disturbances, and protect occupants. They are typically formed by stamping with dies. First, a machine straightens a carbonized steel sheet and cuts it to the desired length. Then, the steel sheet is sent to a press, where a die forces the blank into the die to form the shape of the car door, resulting in a stamped car door part.

[0003] The existing Chinese utility model patent with publication number CN222288476U discloses an automotive door forming fixture, belonging to the field of automotive parts processing equipment. It includes a base with columns fixedly installed at each of the four corners of the base's bottom. A lower mold is fixedly installed at the top of the base, and the top of the lower mold has a mold cavity. A top plate is provided above the base, and two symmetrically distributed support plates are fixedly installed between the top plate and the base. An upper mold is slidably installed between the two support plates. A first cylinder is fixedly installed at the top of the top plate, and the piston shaft of the first cylinder slides through the top plate. The end of the piston shaft is fixedly connected to the top of the upper mold. This application, through the setting of a correction component, uses the cooperation of a mounting frame, a first correction plate, a telescopic rod, and a second correction plate to correct and position the raw material, and also to stabilize the raw material, facilitating subsequent stable processing by the equipment. This eliminates the need for multiple adjustments by operators and improves the processing efficiency of the equipment.

[0004] The aforementioned automotive door forming fixture uses a straightening method that involves a cylinder and a telescopic rod to adjust the relative position between the steel plate and the bottom mold. To prevent the straightening plate at the end of the telescopic rod from contacting the steel plate first, which would cause the steel plate to deform due to pressure from the straightening plates on both sides, the cylinder and the telescopic rod need to be operated one by one during the elongation and straightening process. This results in excessive straightening time and affects production efficiency. At the same time, to prevent springback after stamping, the steel plate is currently heated to the austenitizing temperature (approximately 900°C) before stamping and then rapidly cooled in the mold for quenching to prevent springback after stamping. However, the existing automotive door forming fixture has poor heat dissipation performance and cannot meet the requirements for rapid cooling. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides an automotive door forming fixture that solves the problems of poor heat dissipation and long steel plate position correction time.

[0006] To achieve the above objectives, this utility model is implemented through the following technical solution: an automotive door forming fixture includes a base plate, a bottom mold is fixedly installed on the top of the base plate, a straightening mechanism is fixedly installed around the bottom mold for adjusting the position of the steel plate, and a heat dissipation mechanism is fixedly installed on the top of the base plate for quickly reducing the temperature of the bottom mold.

[0007] The correction mechanism includes a stepper motor fixedly installed around the bottom mold, a drive shaft inserted into the end of the stepper motor's rotating shaft, and a limit rod fixedly installed on the outside of the drive shaft;

[0008] The heat dissipation mechanism includes a return pipe fixedly installed inside the bottom mold, one end of which is connected to a pressure stabilizing chamber. A compressor is fixedly installed above the pressure stabilizing chamber. The heat dissipation mechanism also includes a condenser fixedly installed above the bottom plate, and a fan is fixedly installed on the left side of the condenser.

[0009] Preferably, a support frame is fixedly installed above the base plate, a downward piston is fixedly installed at the upper end of the support frame, a moving mold is fixedly installed at the bottom end of the downward piston, and limit posts are inserted at the four corners of the moving mold.

[0010] Preferably, the bottom end of the limiting post is fixedly connected to the bottom mold, the moving mold and the limiting post are slidably connected, the top surface of the bottom mold is provided with a protruding structure that fits into the bottom cavity of the moving mold, and the bottom of the moving mold is provided with an opening structure that fits into the limiting rod.

[0011] Preferably, the stepper motors are mirror-symmetrically mounted on both ends of the drive shaft, and two stepper motors and one drive shaft form a group, for a total of four groups. They are respectively mounted on the outer sides of the front, rear, left, and right facades of the bottom mold by bolts. The limiting rod is provided with a bent structure whose shape matches the outer edge corner of the bottom mold.

[0012] Preferably, the front end of the reflux pipe is connected to the outlet end of the condenser, and the top of the reflux pipe has a continuous bending structure and is located within the protruding structure on the top surface of the bottom mold.

[0013] Preferably, the compressor's air inlet is connected to the pressure stabilizing chamber via a pipeline structure, and its discharge end is connected to the liquid inlet of the condenser via a pipeline structure.

[0014] Beneficial effects

[0015] This utility model provides a molding fixture for automobile doors. Compared with the prior art, it has the following advantages:

[0016] (1) The car door forming fixture is equipped with stepper motors. The stepper motors are mirror-symmetrically installed at both ends of the drive shaft. Two stepper motors and one drive shaft form a group, and there are four groups in total. They are installed on the front, rear, left and right sides of the bottom mold by bolts. The limiting rod is equipped with a bent structure that matches the outer edge corner of the bottom mold. The stepper motor can drive the drive shaft to rotate 90 degrees clockwise and counterclockwise, so that the limiting rod fixed on the outside of the drive shaft can rotate from the horizontal state to the vertical state. At this time, the top structure of the limiting rod remains vertical and is located on the outside of the bottom mold protrusion structure. Thus, during the rotation of the limiting rod, the steel plate is restricted to the top of the bottom mold protrusion structure. At the same time, the opening structure at the bottom of the moving mold is fitted with the limiting rod. During the stamping process, the limiting rod is inserted into the inside of the moving mold. This method can correct the steel plate in four directions at the same time to shorten the correction time and improve production efficiency.

[0017] (2) The automotive door forming fixture, through the setting of the return pipe, the top of the return pipe is a continuous bending structure and is located in the protruding structure on the top surface of the bottom mold. The refrigerant inside the pressure stabilizing chamber is heated by the compressor and then passed into the condenser. The condenser can reduce the heat of the high-temperature refrigerant by the airflow generated by the fan. After the refrigerant is cooled, it will enter the return pipe and move to the part of the return pipe located inside the bottom mold. The refrigerant will evaporate and absorb the heat of the bottom mold, so that the bottom mold is cooled down quickly. The pressure stabilizing chamber can prevent the gas pressure inside the return pipe from exceeding the limit after the expansion of the cooling medium. The evaporated refrigerant will flow back to the pressure stabilizing chamber through the return pipe to form a cycle. The phase change of the refrigerant can quickly absorb the heat transferred from the steel plate to the bottom mold to improve the heat dissipation performance. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the stepper motor mounting structure of this utility model;

[0020] Figure 3 This is a schematic diagram of the connection structure between the bottom mold and the moving mold of this utility model;

[0021] Figure 4 This is a schematic diagram of the connection structure between the return pipe and the bottom mold of this utility model;

[0022] In the diagram: 1. Base plate; 11. Bottom mold; 12. Support frame; 13. Downward piston; 14. Moving mold; 15. Limiting post; 2. Correction mechanism; 21. Stepper motor; 22. Drive shaft; 24. Limiting rod; 3. Heat dissipation mechanism; 31. Return pipe; 32. Pressure stabilizing chamber; 33. Compressor; 34. Condenser; 35. Fan. Detailed Implementation

[0023] 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.

[0024] Please see Figure 1-4 This utility model provides a technical solution: an automotive door forming fixture, including a base plate 1, a bottom mold 11 fixedly installed on the top of the base plate 1, a support frame 12 fixedly installed on the top of the base plate 1, a pressing piston 13 fixedly installed at the upper end of the support frame 12, a moving mold 14 fixedly installed at the bottom end of the pressing piston 13, limit posts 15 inserted at the four corners of the moving mold 14, the bottom end of the limit posts 15 being fixedly connected to the bottom mold 11, and a sliding connection being formed between the moving mold 14 and the limit posts 15. The top surface of the bottom mold 11 is provided with a protruding structure that fits into the bottom cavity of the moving mold 14, and the bottom of the moving mold 14 is provided with an opening structure that fits into a limit rod 24.

[0025] Specifically, the base plate 1 can restrict the position of the bottom mold 11 and the support frame 12, the support frame 12 can restrict the position of the pressing piston 13, the pressing piston 13 can drive the moving mold 14 to move, and the steel plate is formed by the protruding structure at the top of the bottom mold 11 when the pressing piston 13 drives the moving mold 14 to press down. The limiting post 15 can restrict the movement mode of the moving mold 14 and prevent the moving mold 14 from being offset from the bottom mold 11.

[0026] A straightening mechanism 2 is fixedly installed around the bottom mold 11 to adjust the position of the steel plate. The straightening mechanism 2 includes a stepper motor 21 fixedly installed around the bottom mold 11. A drive shaft 22 is inserted and installed at the end of the shaft of the stepper motor 21. A limit rod 24 is fixedly installed on the outside of the drive shaft 22. The stepper motor 21 is mirror-symmetrically installed at both ends of the drive shaft 22. Two stepper motors 21 and one drive shaft 22 form a group, for a total of four groups. They are respectively installed on the outside of the front, back, left and right facades of the bottom mold 11 by bolts. The limit rod 24 is provided with a bent structure whose shape matches the outer edge corner of the bottom mold 11.

[0027] Specifically, the stepper motor 21 can drive the transmission shaft 22 to rotate 90 degrees clockwise and counterclockwise, thereby causing the limiting rod 24 fixed on the outside of the transmission shaft 22 to rotate from a horizontal state to a vertical state. At this time, the top structure of the limiting rod 24 remains vertical and is located on the outside of the protruding structure of the bottom mold 11. Thus, during the rotation of the limiting rod 24, the steel plate is restricted to the top of the protruding structure of the bottom mold 11. At the same time, the opening structure at the bottom of the moving mold 14 is fitted with the limiting rod 24. During the stamping process, the limiting rod 24 is inserted into the interior of the moving mold 14.

[0028] A heat dissipation mechanism 3 is fixedly installed above the base plate 1 to quickly reduce the temperature of the bottom mold 11. The heat dissipation mechanism 3 includes a return pipe 31 fixedly installed inside the bottom mold 11. One end of the return pipe 31 is connected to a pressure stabilizing chamber 32. A compressor 33 is fixedly installed above the pressure stabilizing chamber 32. The heat dissipation mechanism 3 also includes a condenser 34 fixedly installed above the base plate 1. A fan 35 is fixedly installed on the left side of the condenser 34. The front end of the return pipe 31 is connected to the outlet end of the condenser 34. The top of the return pipe 31 has a continuous bending structure and is located in the protruding structure on the top surface of the bottom mold 11. The air inlet end of the compressor 33 is connected to the pressure stabilizing chamber 32 through a pipe structure, and the discharge end is connected to the liquid inlet end of the condenser 34 through a pipe structure.

[0029] Specifically, the pressure stabilizing chamber 32 can prevent the gas pressure inside the return pipe 31 from exceeding the limit due to the expansion of the cooling medium. The compressor 33 raises the temperature of the refrigerant inside the pressure stabilizing chamber 32 and introduces it into the condenser 34. The condenser 34 can reduce the heat of the high-temperature refrigerant through the airflow generated by the fan 35. After cooling, the refrigerant will enter the return pipe 31 and move to the part of the return pipe 31 located inside the bottom mold 11. The refrigerant will evaporate and absorb the heat of the bottom mold 11, causing the bottom mold 11 to cool down quickly. The evaporated refrigerant will flow back into the pressure stabilizing chamber 32 through the return pipe 31 to form a cycle. At the same time, all contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0030] During operation, stepper motors 21 are mirror-symmetrically mounted at both ends of the drive shaft 22, with two stepper motors 21 and one drive shaft 22 forming a group, for a total of four groups. These groups are bolted to the outer sides of the four vertical surfaces of the bottom mold 11: front, rear, left, and right. The limiting rod 24 has a bent structure whose shape matches the outer edge angle of the bottom mold 11. The stepper motors 21 can drive the drive shaft 22 to rotate 90 degrees clockwise and counterclockwise, thereby rotating the limiting rod 24, fixed to the outside of the drive shaft 22, from a horizontal state to a vertical state. At this time, the top structure of the limiting rod 24 remains vertical and is located outside the protruding structure of the bottom mold 11. Thus, during the rotation of the limiting rod 24, the steel plate is restricted to the top of the protruding structure of the bottom mold 11. Simultaneously, the opening structure at the bottom of the moving mold 14 engages with the limiting rod 24. During the stamping process, the limiting rod 24 is inserted into the interior of the moving mold 14. This method allows for simultaneous stamping of the steel plate. The system performs corrections in four directions to shorten correction time and improve production efficiency. The top of the return pipe 31 has a continuous bending structure and is located within the raised structure on the top surface of the bottom mold 11. The compressor 33 raises the temperature of the refrigerant inside the pressure stabilizing chamber 32 and introduces it into the condenser 34. The condenser 34 can reduce the heat of the high-temperature refrigerant through the airflow generated by the fan 35. After cooling, the refrigerant enters the return pipe 31 and moves to the part of the return pipe 31 located inside the bottom mold 11. The refrigerant evaporates and absorbs the heat of the bottom mold 11, causing the bottom mold 11 to cool down quickly. The pressure stabilizing chamber 32 can prevent the gas pressure inside the return pipe 31 from exceeding the limit after the expansion of the cooling medium. The evaporated refrigerant will flow back into the pressure stabilizing chamber 32 through the return pipe 31, forming a cycle. The phase change of the refrigerant quickly absorbs the heat transferred from the steel plate to the bottom mold 11, thereby improving heat dissipation performance.

[0031] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0032] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A molding fixture for automobile doors, comprising a base plate (1), wherein a bottom mold (11) is fixedly installed on the top of the base plate (1), characterized in that: A straightening mechanism (2) is fixedly installed around the bottom mold (11) to adjust the position of the steel plate, and a heat dissipation mechanism (3) is fixedly installed above the bottom plate (1) to quickly reduce the temperature of the bottom mold (11). The correction mechanism (2) includes a stepper motor (21) fixedly installed around the bottom mold (11), and a transmission shaft (22) is inserted at the end of the rotating shaft of the stepper motor (21), and a limit rod (24) is fixedly installed on the outside of the transmission shaft (22). The heat dissipation mechanism (3) includes a return pipe (31) fixedly installed inside the bottom mold (11), one end of the return pipe (31) is connected to a pressure stabilizing chamber (32), a compressor (33) is fixedly installed above the pressure stabilizing chamber (32), and the heat dissipation mechanism (3) also includes a condenser (34) fixedly installed above the bottom plate (1), and a fan (35) is fixedly installed on the left side of the condenser (34).

2. The automotive door forming fixture according to claim 1, characterized in that: A support frame (12) is fixedly installed on the top of the base plate (1). A pressing piston (13) is fixedly installed on the upper end of the support frame (12). A moving mold (14) is fixedly installed on the bottom end of the pressing piston (13). Limiting posts (15) are inserted at the four corners of the moving mold (14).

3. The automotive door forming fixture according to claim 2, characterized in that: The bottom end of the limiting post (15) is fixedly connected to the bottom mold (11), and the moving mold (14) and the limiting post (15) are slidably connected. The top surface of the bottom mold (11) is provided with a protruding structure that fits into the bottom cavity of the moving mold (14), and the bottom of the moving mold (14) is provided with an opening structure that fits into the limiting rod (24).

4. The automotive door forming fixture according to claim 1, characterized in that: The stepper motor (21) is mirror-symmetrically installed at both ends of the transmission shaft (22), and two stepper motors (21) and one transmission shaft (22) form a group, for a total of four groups. They are respectively installed on the front, rear, left and right sides of the bottom mold (11) by bolts. The limiting rod (24) is provided with a bent structure whose shape matches the outer edge corner of the bottom mold (11).

5. The automotive door forming fixture according to claim 1, characterized in that: The front end of the return pipe (31) is connected to the outlet end of the condenser (34). The top of the return pipe (31) is a continuous bending structure and is located in the protruding structure on the top surface of the bottom mold (11).

6. The automotive door forming fixture according to claim 1, characterized in that: The compressor (33) has its air inlet end connected to the pressure stabilizing chamber (32) via a pipe structure, and its discharge end connected to the liquid inlet end of the condenser (34) via a pipe structure.

Images