A stamping die for automobile parts

Abstract

The present invention relates to the technical field of stamping dies, and specifically to a stamping die for automobile parts, comprising a base and a top plate fixed on the top of the base, an upper punch and a lower die that cooperate with each other are installed between the base and the top plate, a hydraulic press that drives the upper punch to move up and down is installed on the top wall of the top plate, and the lower die comprises two half dies that are symmetrically and movably installed on the top wall of the base. In the present invention, after the stamping is completed and the upper punch moves to the top of the lower die, the two half dies begin to separate from each other, and at this time, the stamped molded part is located between the two half dies. Since the distance between the molded part and the inner side wall of the cavity is large, the molded part can be conveniently taken out of the cavity, which can reduce the use cost of the stamping die by avoiding the use of a release agent, and when the molded part is taken out, the side wall of the molded part will not be squeezed and rubbed with the inner side wall of the cavity, thereby improving the processing quality of the stamping die.

Description

Technical Field

[0001] The invention relates to the technical field of stamping dies, in particular to a stamping die for automobile parts. Background Art

[0002] Stamping is a pressure processing method that uses a mold installed on a press to apply pressure to the material at room temperature to cause it to separate or plastically deform, thereby obtaining the desired parts. The stamping die is a special process equipment that processes materials into parts during cold stamping.

[0003] After searching, Chinese patent number CN108580674B discloses a mold for automobile parts, including an upper punch and a lower die, a feed bin is provided in the lower die, a storage airbag is provided in the feed bin, a discharge port and a feeding port are provided on the storage airbag; a feed trough and a guide trough are provided on the lower die; the lower die also includes an inverted U-shaped bracket, the bracket includes a cross bar and a vertical plate, the upper surface of the upper punch is rotatably connected to a screw that passes through the cross plate; the lower die also includes a driving member, the driving member includes a first gear and a rack, a support frame is provided on one side of the lower die, a rotating shaft is provided on the support frame, the first gear is fixed to one end of the rotating shaft, and a turntable is provided at the other end of the rotating shaft; an air storage barrel is provided on one side of the lower die, a piston is slidably connected to the air storage barrel, and the lower die also includes a first connecting rod, a second connecting rod and a third connecting rod hinged in sequence.

[0004] Although the above-mentioned automobile parts mold solves the problem that the automobile parts stamped in the prior art will fit tightly with the lower mold, making it difficult to remove the molded automobile parts, the following shortcomings still exist: by adding a release agent to the lower die during the stamping and demolding process of the blank to quickly demold the molded automobile parts, not only a large amount of release agent is required, which increases the use cost of the stamping mold, but also because the distance between the molded parts and the inner side wall of the lower die is not changed, it is difficult to remove the molded parts from the lower die.

[0005] Therefore, a stamping die for automobile parts is proposed. Summary of the invention

[0006] The object of the present invention is to provide a stamping die for automobile parts, which solves the problems raised in the above background technology by the two half dies starting to separate from each other after the stamping is completed and the upper punch moves to the top of the lower die.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] A stamping die for automobile parts comprises a base and a top plate fixed on the top of the base, an upper punch and a lower die that cooperate with each other are installed between the base and the top plate, a hydraulic press that drives the upper punch to move up and down is installed on the top wall of the top plate, the lower die comprises two half-die symmetrically and movably installed on the top wall of the base, the two half-die are jointly provided with a cavity that cooperates with the upper punch, a workpiece is placed on the top of the two half-die, a transmission structure is provided between the upper punch and the lower die, and when the upper punch moves downward, the transmission mechanism drives the two half-die to be close together, a cooling mechanism connected to the cavity is installed in the lower die, and the cooling mechanism is driven by the upper punch, an auxiliary unloading mechanism is installed on the upper punch, and the auxiliary unloading mechanism is driven by the upper punch, and a positioning component that cooperates with the workpiece is installed on the top of the lower die.

[0009] Starting the hydraulic press can drive the upper punch to move up and down. When the upper punch is located at the top of the lower die, the two half dies separate from each other. When the upper punch moves downward, the transmission mechanism drives the two half dies to stick together. Then the upper punch presses the workpiece into the cavity in the lower die to stamp the workpiece. After the stamping is completed and the upper punch moves to the top of the lower die, the two half dies begin to separate from each other again. At this time, the stamped molded part is located between the two half dies. Since the distance between the molded part and the inner wall of the cavity is large, the molded part can be easily taken out of the cavity, which can reduce the use cost of the stamping die by avoiding the use of a release agent, and the side wall of the molded part will not be squeezed and rubbed with the inner wall of the cavity when the molded part is taken out, thereby The processing quality of the stamping die is improved; when the stamping is completed and the upper punch moves upward, the cooling mechanism can cool the stamped molded part in the cavity, so that the stamped molded part can be taken out in time, and the processing rate of the stamping die is improved; when the stamping is completed and the upper punch moves upward, the auxiliary unloading mechanism can push the molded part to fall off from the bottom end of the upper punch, so as to avoid the molded part connected to the bottom end of the upper punch and moving upward with the upper punch, so as to facilitate the unloading of the molded part and improve the convenience of using the stamping die; when the workpiece is placed on the top of the two separated half-die, the positioning component can position the workpiece, so as to prevent the workpiece from being randomly offset when the two half-die are close to each other, thereby improving the stamping quality of the stamping die.

[0010] Preferably, the transmission mechanism includes two inverted L-shaped plates symmetrically installed on the outer side wall of the top end of the upper punch, side plates are installed on the outer side walls on the opposite sides of the two half-die molds, and the two side plates are respectively located on the lower sides of the two inverted L-shaped plates, the top walls of the two side plates are inclined, and the two side plates respectively cooperate with the two inverted L-shaped plates, two mounting seats are symmetrically installed on the top wall of the base, and a plurality of return springs are commonly installed between the two mounting seats and adjacent side plates, guide rods are installed on the outer side walls of the two side plates, and one end of the guide rods passes through the adjacent mounting seats, guide columns are installed on the top walls of the two inverted L-shaped plates, and the top ends of the two guide columns pass through the top plate.

[0011] When the upper punch is located at the top of the lower die, the two return springs will pull the two half dies apart from each other. When the upper punch moves downward, it will drive the two inverted L-shaped plates on both sides to move downward. When the two inverted L-shaped plates move downward, they will squeeze the inclined surfaces at the top of the two side plates and push the two side plates and the two half dies closer together. When the two half dies are pressed together, the two inverted L-shaped plates will press against one side of the two side plates respectively. At this time, the upper punch continues to move downward and will not push the two side plates and the two half dies closer together. At this time, the upper punch continues to move downward and can move the upper punch at the top of the lower die The workpiece at the end is pressed into the cavity in the lower die and stamped. After the stamping is completed and the upper punch moves to the top of the lower die, the two return springs will pull the two half dies apart from each other. At this time, the stamped molded part is located between the two half dies. Since the distance between the molded part and the inner wall of the cavity is large, the molded part can be easily taken out of the cavity. The upper punch moves downward to automatically drive the two half dies to stick together. There is no need to set up additional driving equipment. The structure is simple, which reduces the manufacturing and use costs of the stamping die.

[0012] Preferably, connecting blocks are installed at both ends of each of the return springs, and the connecting blocks are fixedly installed on the side plates or the mounting seats by fastening bolts.

[0013] The reset spring can be conveniently installed and disassembled, so when the elasticity of the reset spring deteriorates, the reset spring can be replaced in time, thereby improving the use effect of the driving mechanism and the stamping die.

[0014] Preferably, the cooling mechanism includes mounting tubes inserted in two half-die molds, and the bottom ends of the two mounting tubes pass through the half-die molds and the base, a plurality of first branch pipes are installed on the two mounting tubes, and one end of the first branch pipes is connected to the cavity, a plurality of first cylinder bodies are installed on the bottom wall on one side of the top plate, a first piston is installed in each of the first cylinder bodies, a first piston rod is installed in the bottom end of each of the first pistons, and the bottom end of the first piston rod passes through the first cylinder body and is connected to the upper punch, an air inlet pipe and an air outlet pipe are installed at the top end of each of the first cylinder bodies, and a one-way valve is installed on the air inlet pipe and the air outlet pipe, a first connecting pipe is installed at the bottom end of the two mounting tubes, and a cooling pipe is connected between the two first connecting pipes and the air outlet pipe.

[0015] When the upper punch moves downward, it will pull the first piston rod and the first piston downward and suck the gas into the first cylinder through the intake pipe. When the stamping is completed and the upper punch moves upward, it will push the first piston rod and the first piston upward and discharge the gas in the first cylinder through the outlet pipe, the cooling pipe, the first connecting pipe, the mounting pipe and the first branch pipe. The cooling gas discharged through the first branch pipe can cool the stamped molded part in the cavity, thereby facilitating the timely removal of the stamped molded part and improving the processing rate of the stamping die.

[0016] Preferably, the auxiliary unloading mechanism includes an annular mounting tube installed on the top of the upper punch, a plurality of second branch pipes are installed on the bottom end of the annular mounting tube, and the bottom ends of the second branch pipes are connected to the lower side of the upper punch, a plurality of second cylinder bodies are installed on the bottom wall on one side of the top plate, a second piston is installed in each of the second cylinder bodies, a second piston rod is installed in the bottom end of each of the second pistons, and the bottom end of the second piston rod passes through the second cylinder body and is connected to the upper punch, an end pipe is installed on the top of each of the second cylinder bodies, a second connecting pipe is installed on the annular mounting tube, and the end pipe is connected to the second connecting pipe.

[0017] When the upper punch moves downward, it will pull the second piston rod and the first piston downward and suck the gas into the second cylinder body through the end tube, the second connecting tube, the annular mounting tube and the second branch tube. When the upper punch is close to the top of the workpiece, the air between the upper punch and the workpiece can be extracted and the workpiece can be sucked tightly to the bottom end of the upper punch, thereby preventing the workpiece from being randomly positioned during the stamping process, thereby improving the stamping quality of the workpiece. When the stamping is completed and the upper punch moves upward, it will push the second piston rod and the first piston to move upward and discharge the gas in the second cylinder body through the end tube, the second connecting tube, the annular mounting tube and the second branch tube. The gas discharged through the second branch tube can push the molded part to fall off from the bottom end of the upper punch, thereby avoiding the molded part connected to the bottom end of the upper punch and following the upper punch to move upward, thereby facilitating the unloading of the molded part and improving the convenience of using the stamping die.

[0018] Preferably, the positioning assembly includes two fixed plates symmetrically fixedly installed on the upper sides of the two half-die molds, and the outer side walls of the two fixed plates on the opposite sides are elastically connected with positioning clamps that cooperate with the workpiece, and one end of the two positioning clamps is installed with a positioning block that cooperates with the workpiece.

[0019] When the workpiece is placed on the top of the two separated half dies, the two positioning clamps can clamp and position the workpiece, thereby preventing the workpiece from being randomly displaced when the two half dies are close to each other, thereby improving the stamping quality of the stamping die.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. After the stamping is completed and the upper punch moves to the top of the lower die, the two half dies begin to separate from each other. At this time, the stamped molded part is located between the two half dies. Since the distance between the molded part and the inner wall of the cavity is large, the molded part can be easily taken out of the cavity, which can reduce the use cost of the stamping die by avoiding the use of release agents. In addition, when taking out the molded part, the side wall of the molded part will not be squeezed and rubbed with the inner wall of the cavity, thereby improving the processing quality of the stamping die.

[0022] 2. The downward movement of the upper punch can automatically drive the two half dies to stick together without the need for additional driving equipment. The structure is simple, which reduces the manufacturing and use costs of the stamping die.

[0023] 3. When the stamping is completed and the upper punch moves upward, the cooling mechanism can cool the stamped molded parts in the cavity, so as to facilitate the timely removal of the stamped molded parts and improve the processing speed of the stamping die.

[0024] 4. When the stamping is completed and the upper punch moves upward, the auxiliary unloading mechanism can push the molded part to fall off from the bottom end of the upper punch, thereby preventing the molded part connected to the bottom end of the upper punch and moving upward with the upper punch, thereby facilitating the unloading of the molded part and improving the convenience of using the stamping die.

[0025] 5. When the workpiece is placed on the top of the two separated half dies, the positioning assembly can position the workpiece, thereby preventing the workpiece from being randomly displaced when the two half dies are close to each other, thereby improving the stamping quality of the stamping die. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram of the front structure of the present invention before stamping;

[0027] Figure 2 This is a front structural cross-sectional view of the present invention during stamping;

[0028] Figure 3This is a front structural cross-sectional view of the present invention after stamping;

[0029] Figure 4 It is a front structural cross-sectional view of the present invention before stamping;

[0030] Figure 5 It is a structural schematic diagram of the lower concave mold part of the present invention;

[0031] Figure 6 It is a structural schematic diagram of the positioning component part of the present invention;

[0032] Figure 7 This is an enlarged view of the structure of part A of the present invention.

[0033] In the figure: 1. base; 2. top plate; 3. upper punch; 4. lower die; 5. hydraulic press; 6. half die; 7. cavity; 8. workpiece; 9. inverted L-shaped plate; 10. side plate; 11. mounting seat; 12. return spring; 13. guide rod; 14. guide column; 15. connecting block; 16. fastening bolt; 17. mounting pipe; 18. first branch pipe; 19. first cylinder body; 20. first piston; 21. first piston rod; 22. exhaust pipe; 23. first connecting pipe; 24. annular mounting pipe; 25. second branch pipe; 26. second cylinder body; 27. second piston; 28. second piston rod; 29. ​​end pipe; 30. second connecting pipe; 31. fixing plate; 32. positioning splint; 33. positioning block. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the present invention.

[0036] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "multiple" means two or more, unless otherwise clearly and specifically defined. In addition, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] See also Figures 1 to 7 The present invention provides a stamping die for automobile parts, and the technical solution is as follows:

[0038] A stamping die for automobile parts comprises a base 1 and a top plate 2 fixed on the top of the base 1, an upper punch 3 and a lower die 4 which cooperate with each other are installed between the base 1 and the top plate 2, a hydraulic press 5 which drives the upper punch 3 to move up and down is installed on the top wall of the top plate 2, the lower die 4 comprises two half-die dies 6 which are symmetrically and movably installed on the top wall of the base 1, a cavity 7 which cooperates with the upper punch 3 is jointly opened on the two half-die dies 6, a workpiece 8 is jointly placed on the top of the two half-die dies 6, a transmission structure is provided between the upper punch 3 and the lower die 4, when the upper punch 3 moves downward, the transmission mechanism drives the two half-die dies 6 to be close together, a cooling mechanism which is connected with the cavity 7 is installed in the lower die 4, and the cooling mechanism is driven by the upper punch 3, an auxiliary unloading mechanism is installed on the upper punch 3, and the auxiliary unloading mechanism is driven by the upper punch 3, and a positioning component which cooperates with the workpiece 8 is installed on the top of the lower die 4.

[0039] Starting the hydraulic press 5 can drive the upper punch 3 to move up and down. When the upper punch 3 is located at the top of the lower die 4, the two half dies 6 are separated from each other. When the upper punch 3 moves downward, the transmission mechanism drives the two half dies 6 to stick together. Then the upper punch 3 presses the workpiece 8 into the cavity 7 in the lower die 4 to stamp the workpiece 8. After the stamping is completed and the upper punch 3 moves to the top of the lower die 4, the two half dies 6 begin to separate from each other again. At this time, the stamped molded part is located between the two half dies 6. Since the distance between the molded part and the inner side wall of the cavity 7 is large, the molded part can be easily taken out of the cavity 7, which can reduce the use cost of the stamping mold by avoiding the use of a release agent, and the side wall of the molded part will not be squeezed and rubbed against the inner side wall of the cavity 7 when the molded part is taken out. When the stamping is completed and the upper punch 3 moves upward, the cooling mechanism can cool the stamped molded part in the cavity 7, so as to facilitate the timely removal of the stamped molded part and improve the processing rate of the stamping mold. When the stamping is completed and the upper punch 3 moves upward, the auxiliary unloading mechanism can push the molded part to fall off from the bottom end of the upper punch 3, so as to avoid the molded part connected to the bottom end of the upper punch 3 and moving upward with the upper punch 3, so as to facilitate the unloading of the molded part and improve the convenience of using the stamping mold. When the workpiece 8 is placed on the top of the two separated half-die 6, the positioning assembly can position the workpiece 8, so as to prevent the workpiece 8 from being arbitrarily offset when the two half-die 6 are close to each other, thereby improving the stamping quality of the stamping mold.

[0040] As an embodiment of the present invention, refer to Figure 1 , Figure 2 , Figure 3 and Figure 4 The transmission mechanism includes two inverted L-shaped plates 9 symmetrically installed on the outer side wall of the top end of the upper punch 3, side plates 10 are installed on the outer side walls on the opposite sides of the two half-die 6, and the two side plates 10 are respectively located on the lower sides of the two inverted L-shaped plates 9, the top walls of the two side plates 10 are inclined, and the two side plates 10 cooperate with the two inverted L-shaped plates 9 respectively, two mounting seats 11 are symmetrically installed on the top wall of the base 1, and a plurality of return springs 12 are commonly installed between the two mounting seats 11 and the adjacent side plates 10, guide rods 13 are installed on the outer side walls of the two side plates 10, and one end of the guide rods 13 passes through the adjacent mounting seats 11, guide columns 14 are installed on the top walls of the two inverted L-shaped plates 9, and the top ends of the two guide columns 14 pass through the top plate 2.

[0041] When the upper punch 3 is located at the top of the lower die 4, the two return springs 12 will pull the two half dies 6 apart from each other. When the upper punch 3 moves downward, it will drive the two inverted L-shaped plates 9 on both sides to move downward. When the two inverted L-shaped plates 9 move downward, they will squeeze the inclined surfaces at the top of the two side plates 10 respectively and push the two side plates 10 and the two half dies 6 closer. When the two half dies 6 are pressed together, the two inverted L-shaped plates 9 are pressed against one side of the two side plates 10 respectively. At this time, the upper punch 3 continues to move downward and will not push the two side plates 10 and the two half dies 6 closer. At this time, the upper punch 3 continues to move downward and can The workpiece 8 at the top of the lower die 4 is pressed into the cavity 7 in the lower die 4 and the workpiece 8 is stamped. After the stamping is completed and the upper punch 3 moves to the top of the lower die 4, the two return springs 12 will pull the two half-dies 6 apart from each other. At this time, the stamped molded part is located between the two half-dies 6. Since the distance between the molded part and the inner wall of the cavity 7 is large, the molded part can be easily taken out of the cavity 7. The upper punch 3 moves downward to automatically drive the two half-dies 6 to stick together. There is no need to set up additional driving equipment. The structure is simple, which reduces the manufacturing and use costs of the stamping die.

[0042] As an embodiment of the present invention, refer to Figure 4 and Figure 7 Both ends of each return spring 12 are equipped with connecting blocks 15 , and the connecting blocks 15 are fixedly mounted on the side plate 10 or the mounting seat 11 by fastening bolts 16 .

[0043] The reset spring 12 can be conveniently installed and disassembled, so when the elasticity of the reset spring 12 deteriorates, the reset spring 12 can be replaced in time, thereby improving the use effect of the driving mechanism and the stamping die.

[0044] As an embodiment of the present invention, refer to Figure 2 , Figure 3 and Figure 4 The cooling mechanism includes a mounting tube 17 inserted into the two half-die molds 6, and the bottom ends of the two mounting tubes 17 penetrate the half-die molds 6 and the base 1, and a plurality of first branch pipes 18 are installed on the two mounting tubes 17, and one end of the first branch pipe 18 is connected to the cavity 7, and a plurality of first cylinder bodies 19 are installed on the bottom wall on one side of the top plate 2, and a first piston 20 is installed in each first cylinder body 19, and a first piston rod 21 is installed at the bottom end of each first piston 20, and the bottom end of the first piston rod 21 penetrates the first cylinder body 19 and is connected to the upper punch 3, and an air inlet pipe and an air outlet pipe 22 are installed at the top end of each first cylinder body 19, and a one-way valve is installed on the air inlet pipe and the air outlet pipe 22, and a first connecting pipe 23 is installed at the bottom end of the two mounting tubes 17, and a cooling pipe is connected between the two first connecting pipes 23 and the air outlet pipe 22.

[0045] When the upper punch 3 moves downward, it will pull the first piston rod 21 and the first piston 20 downward and suck the gas into the first cylinder 19 through the air inlet pipe. When the stamping is completed and the upper punch 3 moves upward, it will push the first piston rod 21 and the first piston 20 upward and discharge the gas in the first cylinder 19 through the air outlet pipe 22, the cooling pipe, the first connecting pipe 23, the mounting pipe 17 and the first branch pipe 18. The cooling gas discharged through the first branch pipe 18 can cool the stamped molded parts in the cavity 7, thereby facilitating the timely removal of the stamped molded parts and improving the processing rate of the stamping die.

[0046] As an embodiment of the present invention, refer to Figure 2 , Figure 3 and Figure 4 The auxiliary unloading mechanism includes an annular mounting tube 24 installed on the top of the upper punch 3, a plurality of second branch pipes 25 are installed at the bottom end of the annular mounting tube 24, and the bottom ends of the second branch pipes 25 are connected to the lower side of the upper punch 3, and a plurality of second cylinder bodies 26 are installed on the bottom wall on one side of the top plate 2, each second cylinder body 26 is installed with a second piston 27, and a second piston rod 28 is installed at the bottom end of each second piston 27, and the bottom end of the second piston rod 28 passes through the second cylinder body 26 and is connected to the upper punch 3, an end pipe 29 is installed at the top of each second cylinder body 26, a second connecting pipe 30 is installed on the annular mounting tube 24, and the end pipe 29 is connected to the second connecting pipe 30.

[0047] When the upper punch 3 moves downward, it will pull the second piston rod 28 and the first piston 20 downward and suck the gas into the second cylinder body 26 through the end tube 29, the second connecting tube 30, the annular mounting tube 24 and the second branch tube 25. When the upper punch 3 is close to the top of the workpiece 8, the air between the upper punch 3 and the workpiece 8 can be extracted and the workpiece 8 can be sucked tightly to the bottom end of the upper punch 3, thereby preventing the workpiece 8 from being randomly positioned during the stamping process, thereby improving the stamping quality of the workpiece 8. When the stamping is completed and the upper punch 3 moves upward, it will push the second piston rod 28 and the first piston 20 to move upward and discharge the gas in the second cylinder body 26 through the end tube 29, the second connecting tube 30, the annular mounting tube 24 and the second branch tube 25. The gas discharged through the second branch tube 25 can push the molded part to fall off from the bottom end of the upper punch 3, thereby avoiding the molded part connected to the bottom end of the upper punch 3 and following the upper punch 3 to move upward, thereby facilitating the unloading of the molded part and improving the convenience of using the stamping die.

[0048] As an embodiment of the present invention, refer to Figure 4 and Figure 6The positioning assembly includes two fixing plates 31 symmetrically fixedly installed on the upper sides of the two half-die molds 6. The outer side walls of the two fixing plates 31 on the opposite side are elastically connected with positioning clamps 32 that cooperate with the workpiece 8. One end of the two positioning clamps 32 is installed with positioning blocks 33 that cooperate with the workpiece 8.

[0049] When the workpiece 8 is placed on the top of the two separated half dies 6, the two positioning clamps 32 can clamp and position the workpiece 8, thereby preventing the workpiece 8 from being randomly shifted when the two half dies 6 are close to each other, thereby improving the stamping quality of the stamping die.

[0050] Working principle: when the upper punch 3 is located at the top of the lower die 4, the two return springs 12 will pull the two half dies 6 apart from each other, and when the upper punch 3 moves downward, it will drive the two inverted L-shaped plates 9 on both sides to move downward, and when the two inverted L-shaped plates 9 move downward, they will respectively squeeze the inclined surfaces at the top of the two side plates 10 and push the two side plates 10 and the two half dies 6 closer together. When the two half dies 6 are pressed together, the two inverted L-shaped plates 9 are respectively pressed against one side of the two side plates 10. At this time, the upper punch 3 continues to move downward and will not push the two side plates 10 and the two half dies 6 closer together. At this time, the upper punch 3 continues to move downward and can press the workpiece 8 at the top of the lower die 4 into the cavity 7 in the lower die 4 and stamp the workpiece 8. The stamping is completed and the upper punch 3 moves After reaching the top of the lower die 4, the two return springs 12 will pull the two half dies 6 apart from each other. At this time, the stamped molded part is located between the two half dies 6. Since the distance between the molded part and the inner wall of the cavity 7 is large, the molded part can be easily taken out of the cavity 7, which can reduce the use cost of the stamping die by avoiding the use of a release agent, and the side wall of the molded part will not be squeezed and rubbed with the inner wall of the cavity 7 when the molded part is taken out, thereby improving the processing quality of the stamping die; when the upper punch 3 moves downward, it will pull the first piston rod 21 and the first piston 20 to move downward and inhale the gas into the first cylinder 19 through the intake pipe. When the stamping is completed and the upper punch 3 moves upward, it will push the first piston rod 21 and the first piston 20 to When the upper punch 3 moves downward, it will pull the second piston rod 28 and the first piston 20 to move downward and suck the gas into the second cylinder 26 through the end pipe 29, the second connecting pipe 30, the annular mounting pipe 24 and the second branch pipe 25. When the upper punch 3 is close to the top of the workpiece 8, the air between the upper punch 3 and the workpiece 8 can be extracted and the workpiece 8 can be sucked tightly to the bottom end of the upper punch 3, thereby preventing the workpiece 8 from being randomly positioned during the stamping process, thereby improving the stamping quality of the workpiece 8. When the punch 3 moves upward, it will push the second piston rod 28 and the first piston 20 to move upward and discharge the gas in the second cylinder 26 through the end pipe 29, the second connecting pipe 30, the annular mounting pipe 24 and the second branch pipe 25. The gas discharged through the second branch pipe 25 can push the molded part to fall off from the bottom end of the upper punch 3, thereby preventing the molded part connected to the bottom end of the upper punch 3 from moving upward with the upper punch 3, thereby facilitating the unloading of the molded part. Safety valves are installed on the first cylinder 19 and the second cylinder 26. When the pressure in the first cylinder 19 and the second cylinder 26 is too high or too low, the safety valves start to work, thereby preventing the pressure in the first cylinder 19 and the second cylinder 26 from being too high or too low to cause safety accidents or hinder the upward and downward movement of the upper punch 3.When the workpiece 8 is placed on the top of the two separated half-die 6, the two positioning clamps 32 can clamp and position the workpiece 8, thereby preventing the workpiece 8 from being randomly offset when the two half-die 6 are close to each other.

[0051] The electrical components appearing in this article are all connected to the external main controller and 220V AC power through a transformer, and the main controller can be a conventional known device that controls a computer, etc. The product model provided by the present invention is only used for the technical solution according to the structural characteristics of the product. The product will be adjusted and modified after purchase to make it more matching and consistent with the technical solution of the present invention. It is a technical solution for the best application of the technical solution. The model of its product can be replaced and modified according to the required technical parameters, which is well known to technical personnel in this field. Therefore, technical personnel in this field can clearly obtain the corresponding use effect through the technical solution provided by the present invention.

[0052] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A stamping die for automobile parts, comprising a base (1) and a top plate (2) fixed to the top of the base (1), wherein an upper convex die (3) and a lower concave die (4) which cooperate with each other are installed between the base (1) and the top plate (2). Features: A hydraulic press (5) for driving the upper punch (3) to move up and down is installed on the top wall of the top plate (2); the lower die (4) comprises two half dies (6) symmetrically and movably installed on the top wall of the base (1); a cavity (7) cooperating with the upper punch (3) is formed on the two half dies (6); a workpiece (8) is placed on the top of the two half dies (6); a transmission structure is provided between the upper punch (3) and the lower die (4); when the upper punch (3) moves downward, the transmission structure drives the two half dies (6) to be close together; a cooling structure connected to the cavity (7) is installed in the lower die (4), and the cooling structure is driven by the upper punch (3); an auxiliary unloading structure is installed on the upper punch (3), and the auxiliary unloading structure is driven by the upper punch (3); a positioning component cooperating with the workpiece (8) is installed on the top of the lower die (4); The transmission mechanism comprises two inverted L-shaped plates (9) symmetrically mounted on the outer side wall of the top end of the upper punch (3); side plates (10) are mounted on the outer side walls on the opposite sides of the two half-die molds (6), and the two side plates (10) are respectively located on the lower sides of the two inverted L-shaped plates (9); the top walls of the two side plates (10) are inclined surfaces, and the two side plates (10) respectively cooperate with the two inverted L-shaped plates (9); two mounting seats (11) are symmetrically mounted on the top wall of the base (1); a plurality of return springs (12) are commonly mounted between the two mounting seats (11) and the adjacent side plates (10); guide rods (13) are mounted on the outer side walls of the two side plates (10), and one end of the guide rods (13) is arranged to pass through the adjacent mounting seats (11); guide columns (14) are mounted on the top walls of the two inverted L-shaped plates (9), and the top ends of the two guide columns (14) are arranged to pass through the top plate (2); Both ends of each of the return springs (12) are provided with connecting blocks (15), and the connecting blocks (15) are fixedly mounted on the side plate (10) or the mounting seat (11) by means of fastening bolts (16); The cooling mechanism comprises a mounting tube (17) inserted into the two half-die molds (6), and the bottom ends of the two mounting tubes (17) are both arranged to penetrate the half-die molds (6) and the base (1), a plurality of first branch tubes (18) are mounted on the two mounting tubes (17), and one end of each of the first branch tubes (18) is connected to the cavity (7), a plurality of first cylinder bodies (19) are mounted on the bottom wall of one side of the top plate (2), a first piston (20) is mounted in each of the first cylinder bodies (19), and each of the first pistons (20) is The bottom end of each plug (20) is equipped with a first piston rod (21), and the bottom end of each first piston rod (21) passes through the first cylinder body (19) and is connected to the upper punch (3). The top end of each first cylinder body (19) is equipped with an air inlet pipe and an air outlet pipe (22), and a one-way valve is installed on the air inlet pipe and the air outlet pipe (22). The bottom ends of the two installation pipes (17) are equipped with a first connecting pipe (23), and a cooling pipe is connected between the two first connecting pipes (23) and the air outlet pipe (22); The auxiliary unloading mechanism comprises an annular mounting tube (24) mounted on the top of the upper punch (3), a plurality of second branch tubes (25) being mounted on the bottom end of the annular mounting tube (24), and the bottom ends of the second branch tubes (25) are all connected to the bottom side of the upper punch (3), a plurality of second cylinder bodies (26) are mounted on the bottom wall of one side of the top plate (2), a second piston (27) is mounted in each of the second cylinder bodies (26), a second piston rod (28) is mounted on the bottom end of each of the second pistons (27), and the bottom ends of the second piston rods (28) pass through the second cylinder body (26) and are connected to the upper punch (3), an end tube (29) is mounted on the top end of each of the second cylinder bodies (26), a second connecting tube (30) is mounted on the annular mounting tube (24), and the end tube (29) is connected to the second connecting tube (30); The positioning assembly comprises two fixing plates (31) symmetrically fixedly mounted on the upper sides of the two half-die molds (6), the outer side walls of the two fixing plates (31) on opposite sides are elastically connected with positioning clamps (32) that cooperate with the workpiece (8), and one end of the two positioning clamps (32) is mounted with positioning blocks (33) that cooperate with the workpiece (8); When the upper punch (3) is located at the top of the lower die (4), the two return springs (12) will pull the two half dies (6) apart from each other. When the upper punch (3) moves downward, it will drive the two inverted L-shaped plates (9) on both sides to move downward. When the two inverted L-shaped plates (9) move downward, they will respectively squeeze the inclined surfaces at the top of the two side plates (10) and push the two side plates (10) and the two half dies (6) closer. When the two half dies (6) are pressed together, the two inverted L-shaped plates (9) are respectively pressed against the two side plates. (10), at this time, if the upper punch (3) continues to move downward, it will not push the two side plates (10) and the two half-die molds (6) closer together. At this time, if the upper punch (3) continues to move downward, it can press the workpiece (8) located at the top of the lower die (4) into the cavity (7) in the lower die (4) and perform stamping on the workpiece (8). After the stamping is completed and the upper punch (3) moves to the top of the lower die (4), the two return springs (12) will pull the two half-die molds (6) apart from each other. At this time, the punch (3) is pressed into the cavity (7) in the lower die (4). The pressed molded part is located between the two half-die (6). Since the distance between the molded part and the inner side wall of the cavity (7) is large, the molded part can be easily taken out of the cavity (7). This can reduce the use cost of the stamping die by avoiding the use of a mold release agent. Moreover, when the molded part is taken out, the side wall of the molded part will not be squeezed and rubbed against the inner side wall of the cavity (7), thereby improving the processing quality of the stamping die. When the upper punch (3) moves downward, it pulls the first piston rod (21) and the first The piston (20) moves downward and sucks gas into the first cylinder (19) through the air inlet pipe. When the stamping is completed and the upper punch (3) moves upward, it pushes the first piston rod (21) and the first piston (20) to move upward and discharge the gas in the first cylinder (19) through the air outlet pipe (22), the cooling pipe, the first connecting pipe (23), the installation pipe (17) and the first branch pipe (18). The cooling gas discharged through the first branch pipe (18) can cool the stamped molded part in the cavity (7).When the upper punch (3) moves downward, it pulls the second piston rod (28) and the first piston (20) to move downward and sucks the gas into the second cylinder (26) through the end tube (29), the second connecting tube (30), the annular mounting tube (24) and the second branch tube (25). When the upper punch (3) is pressed against the top of the workpiece (8), the air between the upper punch (3) and the workpiece (8) can be extracted and the workpiece (8) can be sucked against the bottom of the upper punch (3), thereby preventing the workpiece (8) from being randomly offset during the stamping process, thereby improving the stamping quality of the workpiece (8). When the stamping is completed and the upper punch (3) moves upward, it pushes the second piston rod (28) and the first piston (20) to move upward and sucks the gas in the second cylinder (26) through the end tube (29), the second connecting tube (30), the annular mounting tube (24) and the second branch tube (25). The gas discharged through the second branch pipe (25) can push the molded part to fall off from the bottom end of the upper punch (3), thereby preventing the molded part connected to the bottom end of the upper punch (3) from moving upward with the upper punch (3), thereby facilitating the unloading of the molded part. Safety valves are installed on the first cylinder body (19) and the second cylinder body (26). When the pressure in the first cylinder body (19) and the second cylinder body (26) is too high or too low, the safety valves start to work, thereby preventing the pressure in the first cylinder body (19) and the second cylinder body (26) from being too high or too low, thereby preventing safety accidents or hindering the upward and downward movement of the upper punch (3); when the workpiece (8) is placed on the top of the two separated half-die (6), the two positioning clamps (32) can clamp and position the workpiece (8), thereby preventing the workpiece (8) from being randomly offset when the two half-die (6) are close to each other.

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