Anti-inversion automobile bumper production flanging die and method of use thereof

Abstract

The application discloses an overturn-preventing flanging die for automobile bumper production and a use method thereof, and relates to the field of automobile accessory production. The overturn-preventing flanging die for automobile bumper production comprises a lower die and an upper die, the upper die is connected to the upper side of the lower die in a sliding mode, a plurality of air channels are arranged in the upper die, the air channels are communicated with each other, a cross-shaped air guide pipe is fixedly connected to the middle position of the upper end of the upper die, the air channels close to the middle position are communicated with the air guide openings in the lower end of the cross-shaped air guide pipe, and a hydraulic telescopic rod is fixedly connected to the lower ends of the lower die in a symmetrical mode. Compared with the prior art, the overturn-preventing flanging die for automobile bumper production can easily take out the bumper from the die after the flanging production of the metal bumper is completed, provides convenience for the staff, effectively improves the production efficiency of the overturn-preventing flanging die for automobile bumper production, and is suitable for popularization and use.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of automobile accessory production, in particular to a turnover-preventing flanging die for automobile bumper production and a use method thereof. BACKGROUND

[0002] The automobile bumper is a safety automobile component for absorbing and reducing external impact force and protecting the front and rear parts of the vehicle body. With the development of the automobile industry, the automobile bumper, as an important safety device, has also entered the road of innovation.

[0003] With the diversification of society, many off-road enthusiasts have emerged. Gradually, modified cars have become a culture. Enthusiasts will install some legal and safer accessories on the car to provide good protection for the car during off-road driving. Therefore, the bumper has become a key point for modification. Therefore, in view of this demand, a metal bumper with higher strength and better buffering effect has appeared on the market. In the production process of the metal bumper, a turnover-preventing flanging die for automobile bumper production is needed to punch and flange the metal plate to form a bumper.

[0004] In the prior art, the application number is CN202120608523.X, the application date is March 25, 2021, and the name is a stamping and leveling device for automobile front bumper production. The stamping and leveling device for automobile front bumper production is disclosed, which comprises a stamping machine tool. The first sliding rod is fixedly connected to the left end of the stamping machine tool. The motor is arranged to drive the gear to rotate, so that the upper die and the lower die cooperate to achieve the effect of stamping and forming. Compared with manual stamping with a die, it is more time-saving and labor-saving, and the efficiency is higher. The cooperation of the extension rod and the infrared leveling instrument can level the stamped bumper to ensure the quality.

[0005] The above-mentioned patent can achieve the effect of stamping and forming of the metal plate and level the stamped bumper, but when the bumper is taken out, the bumper needs to be taken out from the lower die by manual operation. When the bumper is closely attached to the lower die, it may be inconvenient to take out the bumper manually.

[0006] In the prior art, the application number is CN201922164916.1, the application date is December 6, 2019, and the name is a multifunctional bumper stamping and forming die. The multifunctional bumper stamping and forming die is disclosed, which comprises an upper die seat and a die base. The upper die seat comprises a module and a convex die. The demolding device avoids the problem that the workpiece is difficult to take out, and improves the work efficiency.

[0007] The above patent can make the bumper after production separate from the concave mold, but since the bumper is still located in the concave mold, it is not completely removed from the concave mold, so that in the process of removing the bumper, the worker may not completely lift the bumper, causing the bumper to collide with the concave mold.

[0008] Therefore, the present application is proposed. SUMMARY

[0009] The technical problem to be solved by the present application is to overcome the shortcomings of the prior art and provide a turnover preventing flanging die for automobile bumper production that can overcome the above problems or at least partially solve the above problems.

[0010] To solve the above technical problems, the basic idea of the technical solution adopted by the present application is: a turnover preventing flanging die for automobile bumper production, comprising: a lower die and an upper die, the upper die is slidably connected above the lower die, wherein the inside of the upper die is provided with a plurality of air channels, the plurality of air channels are in communication with each other, a cross-shaped air guide pipe is fixedly connected to the middle position of the upper end of the upper die, the air channels close to the middle position are in communication with the air guide ports at the lower end of the cross-shaped air guide pipe; a hydraulic telescopic rod is fixedly connected symmetrically to the lower end of the lower die; an air cylinder is symmetrically arranged on both sides of the lower die; a piston rod with a piston is slidably connected in the air cylinder; a vertical rod is fixedly connected symmetrically to the upper end of the lower die; the upper ends of the piston rod and the vertical rod are fixedly connected by a connecting plate; a gas inlet and a gas outlet are provided at the lower end of the side of the air cylinder away from the lower die, a one-way valve is fixedly connected in the gas inlet and the gas outlet respectively, a connecting air pipe is fixedly connected to the gas inlet of the air cylinder, the ends of the two connecting air pipes away from the air cylinder are in communication with the air guide ports on both sides of the cross-shaped air guide pipe respectively; an electromagnetic valve is fixedly connected in the air guide port at the upper end of the cross-shaped air guide pipe.

[0011] Further, a lead screw is rotatably connected symmetrically to the upper end of the lower die, the upper die is rotatably connected with the lead screw through threads, a driving part is arranged above the upper die, and the power output end of the driving part is fixedly connected with the upper end of the lead screw.

[0012] Still further, the driving part comprises a motor and an output shaft, the output shaft is fixedly connected to the upper end of the lead screw, a support plate is arranged between the two output shafts, the support plate is rotatably connected with the output shafts, the motor is fixedly connected above the support plate, the output end of the motor is fixedly connected with a first gear, the upper end of the output shaft is fixedly connected with a second gear, and the first gear and the second gear are connected through a chain.

[0013] In order to facilitate the heating of the metal plate, improve the quality of the bumper after the flanging production, further, the heating plate is embedded in the position close to the lower surface of the upper die, the lower end of the lower die is provided with a cooling water pool, the lower die is arranged in the cooling water pool, one end of the hydraulic telescopic rod away from the lower die is fixedly connected with the lower end of the cooling water pool, and the hydraulic telescopic rod is waterproof.

[0014] In order to facilitate further improvement of the cooling effect on the produced bumper, further, a plurality of heat dissipation water channels are arranged in the lower die at equal intervals close to the lower end of the die cavity, the water inlets on both sides of the heat dissipation water channels are arranged at the upper ends of the lower die on both sides, the bottoms of the heat dissipation water channels are mutually penetrated, a drain pipe is fixedly connected at the water outlet of one of the heat dissipation water channels, and the drain pipe extends downward into the cooling water pool.

[0015] In order to facilitate cooling of the water with excessively high temperature and backflow into the cooling water pool, further, a cooling box is fixedly connected at the bottom of the cooling water pool, a refrigerating device is arranged in the cooling box, one end of the drain pipe away from the lower die is communicated with the water inlet of the cooling box, water pumps are fixedly connected at the two sides of the cooling box, the water inlets of the water pumps are communicated with the water outlets of the cooling box, backwater inlets are arranged at the upper ends of the two sides of the cooling water pool, and the water outlets of the water pumps are communicated with the backwater inlets of the cooling water pool through first connecting pipes.

[0016] In order to facilitate guarantee of the communication between the heat dissipation water channels and the cooling box, further, the drain pipe is a telescopic hose.

[0017] In order to facilitate keeping the water level in the cooling water pool higher than the water inlets of the heat dissipation water channels, further, liquid level sensors are fixedly connected at the two sides of the inner wall of the cooling water pool.

[0018] In order to facilitate further improvement of the cooling effect on the bumper, further, an air suction pump is fixedly connected at one side of the bottom of the cooling water pool, the air inlet of the air suction pump is communicated with the air outlet of the cooling box, and the air outlet of the air suction pump is communicated with the air guide port of the upper end of the cross air guide pipe through a second connecting pipe.

[0019] A use method of the anti-inversion flanging die for producing the bumper of the automobile, comprising the following steps:

[0020] S1: first, the metal plate raw material is placed at the middle position of the lower die, then the upper die is moved downward to stamp the metal plate, so that the metal plate is located in the die cavity formed between the upper die and the lower die, and the metal plate is flanged;

[0021] S2: after the flanging is completed, the hydraulic telescopic rod can be started to drive the lower mold to move upward, and then the lower mold can drive the vertical rod to move upward, and the vertical rod can drive the piston rod to move upward in the cylinder through the connecting plate;

[0022] S3: then the gas in the gas passage in the upper mold can be extracted through the connecting gas pipe, so that the produced metal bumper and the gas passage form a negative pressure;

[0023] S4: then control the upper mold to rise, and then the metal bumper will be removed from the lower mold under the action of the negative pressure;

[0024] S5: finally, the electromagnetic valve is opened, the gas passage is filled with gas, and the suction force on the metal bumper disappears, and then the workers can take the produced metal bumper from the upper mold.

[0025] After the above technical scheme is adopted, the present application has the following beneficial effects compared with the prior art: compared with the prior art, the bumper can be easily taken out of the mold after the flanging production of the metal bumper is completed, which provides convenience for the workers and effectively improves the production efficiency of the anti-reversing automobile bumper production flanging die, and is suitable for popularization and use.

[0026] The specific embodiments of the present application will be described in further detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0027] The drawings are part of the present application and serve to provide a further understanding of the present application, the schematic embodiments of the present application and their descriptions serve to explain the present application, but do not constitute an improper limitation on the present application. Obviously, the drawings described below are only some embodiments, and other drawings can be obtained by those skilled in the art without creative labor.

[0028] In the drawings:

[0029] Figure 1 A front view of a flanging die for anti-reversing automobile bumper production is provided;

[0030] Figure 2 A structure diagram of a flanging die for anti-reversing automobile bumper production is provided;

[0031] Figure 3 A flanging die for anti-reversing automobile bumper production is provided Figure 2 A structure diagram of part A of the present application;

[0032] Figure 4The application provides a turnover-preventing automobile bumper production turn-up die Figure 2 The structural schematic diagram of the middle B part;

[0033] Figure 5 The application provides a turnover-preventing automobile bumper production turn-up die Figure 2 The structural schematic diagram of the middle C part;

[0034] Figure 6 The application provides a turnover-preventing automobile bumper production turn-up die

[0035] Figure 7 The application provides a turnover-preventing automobile bumper production turn-up die

[0036] In the figure: 1, cooling water pool; 101, cooling box; 2, hydraulic telescopic rod; 3, lower die; 301, heat dissipation water channel; 4, screw rod; 5, support plate; 6, output shaft; 7, motor; 8, upper die; 801, heating plate; 802, air channel; 9, air cylinder; 10, piston rod; 11, connecting air pipe; 12, cross air guide pipe; 13, electromagnetic valve; 14, refrigerator; 15, water pump; 16, first connecting pipe; 17, liquid level sensor; 18, drain pipe; 19, air pump; 20, second connecting pipe; 21, vertical rod; 22, connecting plate.

[0037] It should be noted that the drawings and the written description are not intended to limit the scope of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. Embodiment

[0038] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments will be described clearly and completely below by referring to the drawings in the embodiments of the present application. The following embodiments are used to illustrate the present application, but not to limit the scope of the present application. Embodiment

[0039] Reference Figures 1-7The application discloses a turnover-preventing flanging die for automobile bumper production, which comprises a lower die 3 and an upper die 8, the upper die 8 is slidably connected above the lower die 3, a plurality of air channels 802 are arranged in the upper die 8 and are communicated with each other, a cross-shaped air guide pipe 12 is fixedly connected to the upper end of the upper die 8, the air channels 802 near the middle position are communicated with the air outlets of the lower end of the cross-shaped air guide pipe 12, a hydraulic telescopic rod 2 is fixedly connected to the lower end of the lower die 3, air cylinders 9 are symmetrically arranged on the two sides of the lower die 3, a piston rod 10 with a piston is slidably connected in the air cylinder 9, vertical rods 21 are fixedly connected to the upper end of the lower die 3, the upper ends of the piston rod 10 and the vertical rods 21 are fixedly connected through a connecting plate 22, air inlets and air outlets are arranged on the lower end of the side, away from the lower die 3, of the air cylinder 9, one-way valves are fixedly connected in the air inlets and the air outlets respectively, a connecting air pipe 11 is fixedly connected to the air inlet of the air cylinder 9, the two ends, away from the air cylinder 9, of the connecting air pipe 11 are communicated with the air outlets on the two sides of the cross-shaped air guide pipe 12 respectively, and an electromagnetic valve 13 is fixedly connected in the air outlet on the upper end of the cross-shaped air guide pipe 12.

[0040] In the process of automobile accessory production, when the metal plate needs to be processed into a bumper, at this time the staff first transports the metal plate raw material to the side of the flanging die by a transport vehicle, and then places the metal plate raw material at the middle position of the lower die 3, and then the power supply is connected, the upper die 8 is moved downward, the metal plate is stamped, and the two sides of the metal plate raw material are flanged under the cooperation of the upper die 8 and the lower die 3, so as to stamp the metal plate raw material into the same shape as the original car bumper. When the stamping and flanging of the metal plate are completed, the hydraulic telescopic rod 2 is started, the hydraulic telescopic rod 2 drives the lower die 3 to move upward, and then the lower die 3 drives the vertical rod 21 to move upward, and the vertical rod 21 drives the piston rod 10 to move upward in the cylinder 9 through the connecting plate 22, and then the cylinder 9 can exhaust the air passage 802 in the upper die 8 through the connecting air pipe 11. Because the processed metal bumper is tightly attached to the air port of the air passage 802 under the action of the upper die 8 and the lower die 3, after the air passage 802 is exhausted, a negative pressure is formed in the air passage 802, so that the metal bumper is attracted. When the hydraulic telescopic rod 2 drives the lower die 3 to move to the uppermost end, the upper die 8 is controlled to move upward and separate from the lower die 3, and then the metal bumper is removed from the lower die 3 under the action of the negative pressure. When the metal bumper is completely removed from the lower die 3, the staff opens the electromagnetic valve 13 in the upper end of the cross gas guide pipe 12, and then the external gas enters the air passage 802 through the cross gas guide pipe 12, and then the air passage 802 is filled with gas, and the suction force of the metal bumper disappears. Then the staff can easily take the produced metal bumper from the upper die 8, and thus repeatedly, the automobile bumper can be continuously produced. Compared with the prior art, the hydraulic telescopic rod 2, the cylinder 9, the piston rod 10, the vertical rod 21, the connecting air pipe 11, the cross gas guide pipe 12, the electromagnetic valve 13 and the air passage 802 are arranged, and after the metal bumper is flanged, the bumper can be easily taken out of the die, which provides convenience for the staff and effectively improves the production efficiency of the anti-reverse automobile bumper production flanging die, and is suitable for popularization and use. Embodiment

[0041] Reference Figures 1-7The application discloses a turnover mould for preventing overturning of an automobile bumper, which is basically the same as the turnover mould of the embodiment 1, and further comprises the following: the upper end of the lower mould 3 is symmetrically connected with a screw rod 4, the upper mould 8 is rotatably connected with the screw rod 4 through threads, the upper end of the screw rod 4 is fixedly connected with the driving part, the driving part is arranged above the upper mould 8, the driving part is connected with the upper end of the screw rod 4, the driving part comprises a motor 7 and an output shaft 6, the output shaft 6 is fixedly connected with the upper end of the screw rod 4, a supporting plate 5 is arranged between the two output shafts 6, the supporting plate 5 is rotatably connected with the output shaft 6, the motor 7 is fixedly connected above the supporting plate 5, the output end of the motor 7 is fixedly connected with a first gear, the upper end of the output shaft 6 is fixedly connected with a second gear, the first gear and the second gear are connected through a chain, a heating plate 801 is inlaidly arranged in the position close to the lower surface of the upper mould 8, the lower end of the lower mould 3 is provided with a cooling water pool 1, the lower mould 3 is arranged in the cooling water pool 1, one end of the hydraulic telescopic rod 2 away from the lower mould 3 is fixedly connected with the lower end of the cooling water pool 1, the hydraulic telescopic rod 2 is waterproof, the lower end of the mould cavity of the lower mould 3 is provided with a plurality of heat dissipation water channels 301 at equal intervals, the water inlets of the two sides of the heat dissipation water channels 301 are arranged at the upper ends of the two sides of the lower mould 3, the bottoms of the plurality of heat dissipation water channels 301 are mutually penetrated, a drain pipe 18 is fixedly connected with the water outlet of one of the heat dissipation water channels 301, the drain pipe 18 extends downwards out of the cooling water pool 1, the bottom of the cooling water pool 1 is fixedly connected with a cooling box 101, the cooling box 101 is arranged with a refrigerating device 14, one end of the drain pipe 18 away from the lower mould 3 is connected with the water inlet of the cooling box 101, the two sides of the cooling box 101 are fixedly connected with a water pump 15, the water inlet of the water pump 15 is connected with the water outlet of the cooling box 101, the upper end of the two sides of the cooling water pool 1 is provided with a backwater inlet, the water outlet of the water pump 15 is connected with the backwater inlet of the cooling water pool 1 through a first connecting pipe 16.

[0042] The staff first energize the heating plate 801, so that the heating plate 801 heats the upper die 8, when the upper die 8 is heated to a specified temperature, at this time, the unprocessed bumper metal plate raw material is placed on the lower die 3, at this time, the motor 7 is started, the motor 7 drives the first gear to rotate, the first gear drives the second gear to rotate through the chain, the second gear drives the output shaft 6 to rotate, then the output shaft 6 drives the lead screw 4 to rotate, then the lead screw 4 drives the upper die 8 to move down through the thread, when the upper die 8 contacts the metal plate, at this time, the upper die 8 continues to move down, then the metal plate raw material is bent under the pressure of the upper die 8, when the upper die 8 and the lower die 3 are attached, forming a sealed mold cavity, at this time, the shape of the metal plate raw material is compressed to the same shape as the inside of the mold cavity, then the metal plate raw material forms the same shape as the bumper, then the upper die 8 is kept stationary and maintained for a period of time, so that the upper die 8 heats the metal plate raw material, thereby reducing the rigidity of the metal plate, so that the two sides of the metal plate can be tightly attached to the inner wall of the upper die 8 and the lower die 3, thereby improving the quality of the bumper, after hot pressing of the metal plate, the hydraulic telescopic rod 2 is started, so that the hydraulic telescopic rod 2 drives the lower die 3 to move down, so that the lower die 3 is immersed in the cooling water in the cooling water pool 1, when the cooling water covers the lower die 3, at this time, the cooling water flows into the heat dissipation water channel 301 through the water inlet of the heat dissipation water channel 301, then flows into the cooling box 101 through the drain pipe 18, the hot water in the cooling box 101 is cooled by the refrigerator 14, so that the hot water can be cooled, then the cooled water is pumped into the first connecting pipe 16 by the water pump 15, then the cooling water can enter the cooling water pool 1 again through the first connecting pipe 16, so that the cooling water can circulate in the heat dissipation water channel 301, so as to circulate the heat dissipation of the metal plate, thereby cooling the metal plate to improve the quality of the bumper production. Embodiment

[0043] Reference Figures 1-7 A reverse-proof automobile bumper production flanging die basically the same as embodiment 2, further: the drain pipe 18 is a telescopic hose, by setting the drain pipe 18 as a telescopic hose, when the lower die 3 is adjusted up and down, the water flow can always flow into the cooling box 101, effectively ensuring the stability of the water flow;

[0044] The inner wall of the cooling water tank 1 is fixedly connected with liquid level sensors 17 on both sides, the liquid level sensors 17 are arranged on the inner wall of the cooling water tank 1 on both sides, when the lower mold 3 moves to the lowermost end of the cooling water tank 1, and the water depth in the cooling water tank 1 is close to the water inlet of the heat dissipation water channel 301, at this time, the liquid level sensor 17 detects that the water level in the cooling water tank 1 has reached the lowermost limit, then the liquid level sensor 17 controls the water pump 15 to work through the external controller, then the water cooled in the cooling box 101 is transported into the cooling water tank 1 through the first connecting pipe 16, so as to supplement the cooling water in the cooling water tank 1, so that the cold water in the cooling water tank 1 can continuously enter the heat dissipation water channel 301, and the bumper is cooled and shaped, and through the arrangement of the liquid level sensor 17, the water pump 15 can only supplement the cooling water in the cooling water tank 1 when the liquid level in the cooling water tank 1 is low, so that the water in the heat dissipation water channel 301 can be fully cooled by the refrigeration device 14, so as to ensure that the water entering the heat dissipation water channel 301 can always maintain a lower temperature, and the heat dissipation effect of the bumper is effectively improved.

[0045] The bottom of the cooling water tank 1 is fixedly connected with an air suction pump 19, the air inlet of the air suction pump 19 is communicated with the air outlet of the cooling box 101, and the air outlet of the air suction pump 19 is communicated with the air guide port of the upper end of the cross air guide pipe 12 through the second connecting pipe 20. Through the arrangement of the air suction pump 19 and the second connecting pipe 20, when the bumper needs to be cooled and shaped, the air suction pump 19 is started, the cold air in the cooling box 101 is transported into the second connecting pipe 20, then the electromagnetic valve 13 is opened, the cold air is transported into the air channel 802 of the upper mold 8 through the cross air guide pipe 12, then is sprayed to the bumper through the air outlet of the air channel 802, then overflows to both sides along the gap between the bumper and the upper mold 8, and then is cooled by the heat dissipation water channel 301, so that the upper and lower surfaces of the bumper can be cooled at the same time, so that the bumper can be cooled and shaped, and the cold air entering the air channel 802 can also have a certain heat dissipation effect on the upper mold 8, so that the worker can take the bumper from the upper mold 8, avoids the worker from being accidentally scalded by the upper mold 8, and effectively improves the protection effect of the mold on the worker.

[0046] Compared with the prior art, through the arrangement of the hydraulic telescopic rod 2, the air cylinder 9, the piston rod 10, the vertical rod 21, the connecting air pipe 11, the cross air guide pipe 12, the electromagnetic valve 13 and the air channel 802, after the metal bumper is completed by the flanging production, the bumper can be easily taken out of the mold, the worker is convenient, the production efficiency of the anti-reverse flanging mold for producing the bumper of the automobile is effectively improved, and the flanging mold is suitable for popularization and use.

[0047] In the description provided herein, numerous specific details are set forth. However, it is understood that embodiments of the application can be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been described in detail in order not to obscure the understanding of this description.

[0048] The above descriptions are only the preferred embodiment of the present application, and are not intended to limit the present application in any form. Although the present application has been disclosed with the preferred embodiment as above, it is not intended to limit the present application, and any skilled person in the art can make some changes or modifications to the above-mentioned technical content as equivalent embodiments with slight changes or modifications within the scope of the technical solution of the present application, but as long as it does not deviate from the content of the technical solution of the present application, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present application are still within the scope of the present application.

Claims

1. A flanging mold for producing anti-tipping car bumpers, characterized in that, Include: Lower mold (3) and upper mold (8), the upper mold (8) is connected above the lower mold (3) up and down, wherein the inside of the upper mold (8) is provided with a plurality of air passages (802), a plurality of air passages (802) are communicated with each other, the middle position of the upper end of the upper mold (8) is fixedly connected with a cross air guide pipe (12), the air passage (802) close to the middle position is communicated with the air guide port of the lower end of the cross air guide pipe (12); Hydraulic telescopic rod (2), symmetrically fixedly connected on both sides of the lower end of the lower mold (3); Air cylinder (9), symmetrically arranged on both sides of the lower mold (3); Piston rod (10) with piston, slidingly connected in the air cylinder (9); Vertical rod (21), symmetrically fixedly connected on both sides of the upper end of the lower mold (3); The upper end of the piston rod (10) and the vertical rod (21) is fixedly connected through the connecting plate (22); The air cylinder (9) is provided with an air inlet and an air outlet on the lower end of the side away from the lower mold (3), a one-way valve is fixedly connected in the air inlet and the air outlet, a connecting air pipe (11) is fixedly connected at the air inlet of the air cylinder (9), and the two connecting air pipes (11) are communicated with the air guide ports on both sides of the cross air guide pipe (12) respectively. Solenoid valve (13), fixedly connected in the air guide port of the upper end of the cross air guide pipe (12); The processed metal bumper is closely attached to the air port of the air passage (802) under the action of the upper mold (8) and the lower mold (3), so that after the air in the air passage (802) is extracted, negative pressure is formed in the air passage (802), so that suction force can be generated on the metal bumper.

2. The roll-over-preventing flanging die for manufacturing a bumper of an automobile according to claim 1, characterized in that: The upper end of the lower mold (3) is symmetrically rotatably connected with a lead screw (4), the two sides of the upper mold (8) are rotatably connected with the lead screw (4) through threads, and a driving part is arranged above the upper mold (8). The power output end of the driving part is fixedly connected with the upper end of the lead screw (4).

3. The roll-over-preventing flanging die for producing a bumper of an automobile according to claim 2, characterized in that: The driving part includes a motor (7) and an output shaft (6), the output shaft (6) is fixedly connected with the upper end of the lead screw (4), a supporting plate (5) is arranged between the two output shafts (6), the supporting plate (5) is rotatably connected with the output shaft (6), the motor (7) is fixedly connected above the supporting plate (5), the output end of the motor (7) is fixedly connected with a first gear, the upper end of the output shaft (6) is fixedly connected with a second gear, and the first gear and the second gear are connected through a chain.

4. The roll-over-preventing bumper production flanging die of claim 1, wherein: The heating plate (801) is embeddedly arranged in the position close to the lower surface in the upper mold (8), the lower end of the lower mold (3) is provided with a cooling water pool (1), the lower mold (3) is arranged in the cooling water pool (1), one end of the hydraulic telescopic rod (2) away from the lower mold (3) is fixedly connected with the lower end of the cooling water pool (1), and the hydraulic telescopic rod (2) is waterproof.

5. The roll-over-preventing automobile bumper production flanging die according to claim 4, characterized in that: The lower mold (3) is internally provided with equidistantly arranged heat dissipation channels (301) near the lower end of the mold cavity, water inlets of the heat dissipation channels (301) are arranged on the upper ends of the two sides of the lower mold (3), bottoms of the heat dissipation channels (301) are mutually penetrated, and one of the heat dissipation channels (301) is fixedly connected with a drain pipe (18) at a water outlet thereof.

6. The roll-over-preventing flanging die for producing a bumper of an automobile according to claim 5, characterized in that: The cooling tank (1) is fixedly connected with a cooling box (101) at the bottom, the cooling box (101) is internally provided with a refrigerating device (14), the drain pipe (18) is communicated with a water inlet of the cooling box (101) at an end away from the lower mold (3), the cooling box (101) is fixedly connected with a water pump (15) at the two sides, the water inlet of the water pump (15) is communicated with a water outlet of the cooling box (101), and the two upper ends of the cooling tank (1) are provided with water return inlets.

7. The roll-over-preventing flanging die for producing a bumper of an automobile according to claim 6, characterized in that: The drain pipe (18) is a telescopic hose.

8. The roll-over-preventing flanging die for producing a bumper of an automobile according to claim 6, characterized in that: Liquid level sensors (17) are fixedly connected to the inner walls of the cooling tank (1) at the two sides.

9. The roll-over-preventing flanging die for producing a bumper of an automobile according to claim 6, characterized in that: A gas pump (19) is fixedly connected to one side of the bottom of the cooling tank (1), an air inlet of the gas pump (19) is communicated with an air outlet of the cooling box (101), and an air outlet of the gas pump (19) is communicated with an air guide inlet of the upper end of the cross air guide pipe (12) through a second connecting pipe (20).

10. A method of using a roll-over die for producing a roll-over bumper for a vehicle, using a roll-over die for producing a roll-over bumper for a vehicle according to claim 1, characterized in that, The method comprises the following steps: S1: first, the metal plate raw material is placed in the middle position of the lower mold (3), then the upper mold (8) is moved downward to punch the metal plate, so that the metal plate is located in the mold cavity formed between the upper mold (8) and the lower mold (3) to be flanged; S2: after the flanging is completed, the hydraulic telescopic rod (2) is started to drive the lower mold (3) to move upward, then the lower mold (3) drives the vertical rod (21) to move upward, and the vertical rod (21) drives the piston rod (10) to move upward in the cylinder (9) through the connecting plate (22); S3: then, the air duct (802) in the upper mold (8) is exhausted through the connecting air pipe (11) to form negative pressure between the produced metal bumper and the air duct (802); S4: then, the upper mold (8) is controlled to rise, and then the metal bumper is separated from the lower mold (3) under the action of the negative pressure suction; S5: finally, the electromagnetic valve (13) is opened, the air duct (802) is filled with gas, and the suction force on the metal bumper disappears, and then the produced metal bumper is taken off from the upper mold (8).

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