A high-precision stamping die

Abstract

The present invention relates to the field of molds, and specifically to a high-precision stamping mold, comprising a base plate, a support seat fixedly connected to the top of the base plate, a workbench fixedly connected to the top of the support seat, a lower mold core detachably connected to the top of the workbench, a support leg fixedly connected to the top of the support leg, a hydraulic cylinder fixedly connected to the bottom of the top plate, a mobile platform fixedly connected to the top of the hydraulic cylinder output shaft, and an upper mold core detachably connected to the bottom of the mobile platform. The present invention uses a spring that is quickly and detachably installed on a guide elastic device. The spring is not fixed by welding as in the prior art, and will not cause damage to the surface of the mobile platform or the transmission shaft. It is convenient and quick to replace, and the operation is simple. It avoids the problem of mold stamping problems after long-term use of the spring due to the difficulty in replacing the spring and the artificial lengthening of the spring replacement interval.

Description

Technical Field

[0001] The invention relates to the field of moulds, in particular to a high-precision stamping mould. Background Art

[0002] Stamping is a processing technology. It is a pressure processing method that uses a mold to apply pressure to the material at room temperature to separate or plastically deform it, thereby obtaining the required parts. Most of them use cylinders or presses as driving sources. Stamping dies are special process equipment that processes materials into parts in cold stamping. They are called cold stamping dies. Springs need to be maintained or replaced regularly. Many domestic users can maintain equipment and molds, but often ignore the maintenance of springs. Some users have not replaced the springs for many years. The same workstation or mold is often damaged or stamped with material, but the cause cannot be found. After replacing the spring, the problem is completely solved.

[0003] At present, the installation of springs on the market is usually to drill holes on the upper and lower sides of the mold first, and then use spring locating pins to fix the spring to the mold. It is inconvenient to replace, and drilling will also affect the strength of the mold itself. At the same time, when the mold is stamping, debris will be generated on the surface of the stamped parts and fall into the lower mold core, which needs to be cleaned in time, otherwise it will affect the surface quality of the next stamped parts. Therefore, there is an urgent need for a stamping mold that is easy to replace the spring and the debris inside the lower mold core can be automatically cleaned. Summary of the invention

[0004] In view of the problems in the prior art, the present invention provides a high-precision stamping die.

[0005] The technical solution adopted by the present invention to solve its technical problems is: a high-precision stamping die, comprising a base plate, a support seat is fixedly connected to the top of the base plate, a workbench is fixedly connected to the top of the support seat, a lower mold core is detachably connected to the top of the workbench, a support leg is fixedly connected to the top of the support leg, a top plate is fixedly connected to the bottom of the top plate, a hydraulic cylinder is fixedly connected to the bottom of the top plate, a moving table is fixedly connected to the top of the hydraulic cylinder output shaft, an upper mold core is detachably connected to the bottom of the moving table, four guide elastic devices distributed in a rectangular array are arranged between the upper mold core and the lower mold core, and blowing devices are arranged at both ends of the support seat.

[0006] Preferably, the guide elastic device includes a transmission shaft running through the movable table and the working table, and the movable table and the working table are fixedly connected to a limiting disc on opposite sides, the limiting disc is rotatably connected to a positioning body on the outside, and a semi-circular arc plate is threadedly connected to the inner circumference of the positioning body, a limiting annular groove is opened inside the semi-circular arc plate, and a spring is slidably connected inside the limiting annular groove, both ends of the spring are provided with a first positioning hole, and the semi-circular arc plate is provided with a second positioning hole on the side away from the spring, and positioning pins are slidably connected inside the first positioning hole and the second positioning hole, the positioning pin is fitted with the limiting disc, and an extruded rib of a rubber material component is slidably connected inside the limiting annular groove, the outer circumference of the extruded rib is fitted with the spring, the inner circumference of the extruded rib is fixedly connected to the limiting arc plate, the limiting arc plate is fitted with the semi-circular arc plate, and the limiting arc plate is slidably connected to the transmission shaft.

[0007] Preferably, the blowing device includes a piston threadedly connected to the bottom end of the transmission shaft, a gas compression column is slidably connected to the outside of the piston, a three-way pipe is fixedly connected to one side of the outer wall of the gas compression column, one end of the three-way pipe is fixedly connected to an intake one-way valve, the other end of the three-way pipe is fixedly connected to a compressed gas storage column, the middle part of one end of the three-way pipe fixedly connected to the compressed gas storage column is fixedly connected to an exhaust one-way valve, the top of the compressed gas storage column is fixedly connected to an outlet pipe, the end of the outlet pipe away from the compressed gas storage column is fixedly connected to a high-pressure nozzle, the middle part of the outlet pipe is fixedly connected to a solenoid valve, and the compressed gas storage column and the gas compression column are both fixedly connected to the bottom plate.

[0008] Preferably, a limiting column is fixedly connected to the bottom of the inner cavity of the gas compression column, an arc-shaped hole is opened at the bottom of the piston, and the limiting column is slidably connected to the arc-shaped hole.

[0009] Preferably, the top end of the transmission shaft is fixedly connected with a hexagonal head, the transmission shaft is threadedly connected to the movable table, and the transmission shaft is slidably connected to the workbench.

[0010] Preferably, the hydraulic cylinder is electrically connected to the solenoid valve, and when the output shaft of the hydraulic cylinder begins to extend, the solenoid valve is closed, and after the output shaft of the hydraulic cylinder is shortened and reset, the solenoid valve is opened.

[0011] Beneficial effects of the present invention:

[0012] (1) The high-precision stamping die described in the present invention has a spring that can be quickly and detachably installed on a guide elastic device. The spring is not fixed by welding as in the prior art, and will not cause damage to the surface of the moving table or the transmission shaft. The replacement is convenient and quick, and the operation is simple. This avoids the problem of stamping problems in the die after long-term use of the spring due to the difficulty in replacing the spring and the artificial lengthening of the spring replacement interval.

[0013] (2) The high-precision stamping die described in the present invention provides power when the movable table moves up and down during the stamping process through the blowing device, and the transmission shaft in the guide elastic device serves as the prime mover to automatically complete the gas suction, compression and ejection, and perform high-pressure blowing on the inner surface of the lower die core after stamping to blow away the debris in the lower die core, thereby preventing the debris from being inside the lower die core and causing damage to the surface of the parts during the next stamping, thereby improving the stamping quality.

[0014] (3) The high-precision stamping die described in the present invention presses the limiting arc plate onto the surface of the semi-circular arc plate through the transmission shaft to limit the spring and prevent the spring from rotating in the semi-circular arc plate. At the same time, when the moving platform descends, it ensures that there is no offset between the moving platform and the workbench, thereby preventing excessive force generated during stamping, which may cause offset between the upper die core and the lower die core and result in poor stamping quality. The guiding function is achieved to improve the stamping accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0017] Figure 2 It is a schematic diagram of the connection between the limiting disc and the moving platform of the present invention;

[0018] Figure 3 It is a partial cross-sectional view of the guide elastic device of the present invention;

[0019] Figure 4 It is a schematic diagram of the connection between the limit arc plate and the semicircular arc plate of the present invention;

[0020] Figure 5 It is a partial exploded view of the guiding elastic device of the present invention;

[0021] Figure 6 It is a partial cross-sectional view of the blowing device of the present invention.

[0022] In the figure: 1 bottom plate, 2 support seat, 3 workbench, 4 lower mold core, 5 support leg, 6 top plate, 7 hydraulic cylinder, 8 moving table, 9 upper mold core, 10 guide elastic device, 11 blowing device, 12 transmission shaft, 13 limit disc, 14 positioning body, 15 semicircular arc plate, 16 limit annular groove, 17 spring, 18 first positioning hole, 19 second positioning hole, 20 positioning pin, 21 extrusion rib, 22 limit arc plate, 23 piston, 24 gas compression column, 25 three-way pipe, 26 suction check valve, 27 compressed gas storage column, 28 exhaust check valve, 29 outlet pipe, 30 high-pressure nozzle, 31 solenoid valve, 32 limit column, 33 arc hole, 34 hexagonal head. DETAILED DESCRIPTION

[0023] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0024] The present invention provides Figure 1-6 A high-precision stamping die shown in the figure comprises a bottom plate 1, a support seat 2 is fixedly connected to the top of the bottom plate 1, a workbench 3 is fixedly connected to the top of the support seat 2, a lower mold core 4 is detachably connected to the top of the workbench 3, a support leg 5 is fixedly connected to the top of the support leg 5, a top plate 6 is fixedly connected to the top of the top plate 6, a hydraulic cylinder 7 is fixedly connected to the bottom of the top plate 6, a moving platform 8 is fixedly connected to the top of the output shaft of the hydraulic cylinder 7, an upper mold core 9 is detachably connected to the bottom of the moving platform 8, and four guiding elastic devices 1 distributed in a rectangular array are arranged between the upper mold core 9 and the lower mold core 4 0, both ends of the support seat 2 are provided with a blowing device 11, the material is punched through the upper die core 9 and the lower die core 4, and the movable table 8 and the workbench 3 are guided and positioned through the guide elastic device 10 to prevent the movable table 8 and the workbench 3 from slightly offsetting due to the large punching force during the punching process, resulting in reduced precision during the punching. At the same time, the spring 17 can be quickly disassembled and assembled without fixing the spring 17 by welding. The surface of the lower die core 4 is blown with high pressure through the blowing device 11 to blow away the debris generated during the punching to prevent affecting the surface quality of the parts during the next punching;

[0025] The guide elastic device 10 includes a transmission shaft 12 that passes through the moving table 8 and the working table 3. The moving table 8 and the working table 3 are fixedly connected to a limiting disc 13 on opposite sides. The limiting disc 13 is rotatably connected to a positioning body 14 on the outside. A semi-circular arc plate 15 is threadedly connected to the inner circumference of the positioning body 14. A limiting annular groove 16 is formed inside the semi-circular arc plate 15. A spring 17 is slidably connected to the limiting annular groove 16. First positioning holes 18 are formed at both ends of the spring 17. Second positioning holes 19 are formed on the side of the semi-circular arc plate 15 away from the spring 17. Positioning pins 20 are slidably connected to the first positioning holes 18 and the second positioning holes 19. The positioning pins 20 are fitted with the limiting disc 13. An extruded rib 21 made of a rubber material component is slidably connected to the limiting annular groove 16. The outer circumference of the extruded rib 21 is fitted with the spring 17. The extruded rib 21 The inner circumference is fixedly connected with a limiting arc plate 22, and the limiting arc plate 22 is fitted with the semicircular arc plate 15. The limiting arc plate 22 is slidably connected with the transmission shaft 12. By placing the two ends of the spring 17 into the limiting annular groove 16 in the semicircular arc plate 15, and then using the extrusion rib 21 to press the spring 17 into the limiting annular groove 16, and make the limiting arc plate 22 fit with the semicircular arc plate 15, thereafter the positioning pin 20 is inserted into the first positioning hole 18 and the second positioning hole 19, and then the semicircular arc plate 15 is moved into the positioning body 14, the positioning body 14 is rotated, and the semicircular arc plate 15 is fixed by using the threaded connection between the positioning body 14 and the semicircular arc plate 15, the positioning body 14 is fitted with the limiting disc 13, so that the positioning pin 20 is pressed into the first positioning hole 18, and finally the transmission shaft 12 passes through the two limiting discs 13, and the transmission shaft 12 presses the limiting arc plate 22 onto the semicircular arc plate 15 to complete the installation of the spring 17.

[0026] Furthermore, in the above technical solution, the blowing device 11 includes a piston 23 threadedly connected to the bottom end of the transmission shaft 12, and a gas compression column 24 is slidably connected to the outside of the piston 23. A three-way pipe 25 is fixedly connected to one side of the outer wall of the gas compression column 24, and one end of the three-way pipe 25 is fixedly connected to an air intake check valve 26, and the other end of the three-way pipe 25 is fixedly connected to a compressed gas storage column 27. The middle part of one end of the three-way pipe 25 and the compressed gas storage column 27 is fixedly connected to an exhaust check valve 28, and the top of the compressed gas storage column 27 is fixedly connected to an outlet pipe 29, and the outlet pipe 29 is fixed away from one end of the compressed gas storage column 27. A high-pressure nozzle 30 is connected, and a solenoid valve 31 is fixedly connected to the middle of the air outlet pipe 29. The compressed gas storage column 27 and the gas compression column 24 are both fixedly connected to the bottom plate 1. When the piston 23 is driven down by the transmission shaft 12, the air in the gas compression column 24 is compressed and transmitted to the compressed gas storage column 27 through the three-way pipe 25 and the exhaust one-way valve 28. When the stamping is completed and the part is taken out, the solenoid valve 31 is opened, and the compressed gas is ejected after passing through the air outlet pipe 29, the solenoid valve 31 and the high-pressure nozzle 30, and the inner surface of the lower mold core 4 is blown with high pressure to blow away the debris falling from the surface of the part during stamping, so as to prevent affecting the surface quality of the part during the next stamping.

[0027] Furthermore, in the above technical solution, a limiting column 32 is fixedly connected to the bottom of the inner cavity of the gas compression column 24, and an arc-shaped hole 33 is opened at the bottom of the piston 23. The limiting column 32 is slidably connected to the arc-shaped hole 33. When the piston 23 is fitted with the bottom of the inner cavity of the gas compression column 24, the limiting column 32 is located in the arc-shaped hole 33, and then the transmission shaft 12 is rotated. The transmission shaft 12 is separated from the piston 23 through a threaded connection with the piston 23. The limiting column 32 limits the piston 23 in the arc-shaped hole 33 to prevent the piston 23 from rotating with the transmission shaft 12 all the time, resulting in the transmission shaft 12 being unable to separate from the piston 23.

[0028] Furthermore, in the above technical solution, a hexagonal head 35 is fixedly connected to the top of the transmission shaft 12, the transmission shaft 12 is threadedly connected to the movable platform 8, and the transmission shaft 12 is slidably connected to the workbench 3. The hexagonal head 35 facilitates manual rotation of the transmission shaft 12 using a wrench, thereby speeding up the threaded connection between the movable platform 8 and the piston 23 and the transmission shaft 12.

[0029] Furthermore, in the above technical solution, the hydraulic cylinder 7 is electrically connected to the solenoid valve 31. When the output shaft of the hydraulic cylinder 7 begins to extend, the solenoid valve 31 is closed. After the output shaft of the hydraulic cylinder 7 is shortened and reset, the solenoid valve 31 is opened. When the hydraulic cylinder 7 descends, the solenoid valve 31 is closed, so that the compressed gas is stored in the compressed gas storage column 27. When the output shaft of the hydraulic cylinder 7 is reset and the parts are taken out from the lower mold core 4, the solenoid valve 31 is opened, and the high-pressure gas begins to flow from the compressed gas storage column 27 to the high-pressure nozzle 30 to blow the debris on the inner surface of the lower mold core 4.

[0030] The implementation method is specifically as follows: the steps of installing the spring 17 are as follows: first, the two ends of the spring 17 are placed in the limiting annular groove 16 in the semicircular plate 15, and then the spring 17 is pressed into the limiting annular groove 16 by the extrusion rib 21, and the limiting arc plate 22 is fitted with the semicircular plate 15, and then the positioning pin 20 is inserted into the first positioning hole 18 and the second positioning hole 19, and then the semicircular plate 15 is moved into the positioning body 14, and the positioning body 14 is rotated, and the semicircular plate 15 is fixed by the threaded connection between the positioning body 14 and the semicircular plate 15, and the positioning body 14 is fitted with the limiting disc 13, so that the positioning pin 20 is pressed into the first positioning hole 18, and finally the transmission shaft 12 passes through the two limiting discs 13, and the transmission shaft 12 presses the limiting arc plate 22 on the semicircular plate 15, and then the transmission shaft 12 is rotated, and the transmission shaft 12 is fixedly connected to the moving platform 8 through a threaded connection, and the transmission shaft 12 is fixedly connected to the piston 23 at the same time;

[0031] Working steps: first, put the raw material into the lower mold core 4, then start the hydraulic cylinder 7, the output shaft of the hydraulic cylinder 7 drives the moving platform 8 to descend, the moving platform 8 drives the transmission shaft 12 and the upper mold core 9 to descend, the transmission shaft 12 limits the position between the moving platform 8 and the workbench 3, the upper mold core 9 cooperates with the lower mold core 4 to punch the raw material, the transmission shaft 12 drives the piston 23 to descend, and compresses the air in the gas compression column 24 into the compressed gas storage column 27. After the punching is completed, the output shaft of the hydraulic cylinder 7 is shortened, the piston 23 rises, and the air is sucked into the gas compression column 24 through the suction check valve 26. When the upper mold core 9 and the lower mold core 4 are separated, the punched parts are taken out, and then the solenoid valve 31 is opened, and the compressed gas is sprayed from the high-pressure nozzle 30 to the inner surface of the lower mold core 4 to blow away the debris generated during the punching;

[0032] Technical effects and advantages: The spring 17 is installed in a quick and detachable manner on the guide elastic device 10. Unlike the prior art in which the spring 17 is fixed by a spring positioning pin after punching, the surface of the movable table 8 or the workbench 3 will not be damaged by the punching. The replacement is convenient and quick, and the operation is simple. The problem of problems in the stamping of the mold after the spring 17 is used for a long time due to the artificial lengthening of the replacement interval of the spring 17 caused by the difficulty in replacing the spring 17 is avoided.

[0033] During the stamping process, the moving table 8 is provided with power when it moves up and down by the blowing device 11, and the transmission shaft 12 in the guide elastic device 10 is used as the prime mover to automatically complete the gas suction, compression and ejection, and perform high-pressure blowing on the inner surface of the lower die core 4 after stamping, so as to blow away the debris in the lower die core 4, thereby preventing the debris from being inside the lower die core 4 and causing the surface of the parts to be damaged during the next stamping, thereby improving the stamping quality;

[0034] The limiting arc plate 22 is pressed against the surface of the semicircular arc plate 15 by the transmission shaft 12 to limit the spring 17 and prevent the spring 17 from rotating in the semicircular arc plate 15. At the same time, when the movable platform 8 descends, it is ensured that there will be no offset between the movable platform 8 and the workbench 3 to prevent the excessive force generated during stamping, which will cause the upper mold core 9 and the lower mold core 4 to offset, resulting in poor stamping quality. The guiding function is achieved to improve the stamping accuracy. This embodiment specifically solves the problem that the installation of the spring 17 in the prior art is usually to open a hole on the upper and lower surfaces of the mold first, and then use the spring 17 to fix the spring on the mold with a spring locating pin. While replacement is inconvenient, punching will also affect the strength of the mold itself. At the same time, when the mold is stamping, debris will be generated on the surface of the stamped parts and fall into the lower mold core 4, which needs to be cleaned in time, otherwise it will affect the surface quality of the parts to be stamped next time. Therefore, there is an urgent need for a stamping mold in which the spring 17 is easy to replace multiple times and the debris inside the lower mold core 4 can be automatically cleaned.

[0035] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A high-precision stamping die, comprising a base plate (1), characterized in that: The top of the bottom plate (1) is fixedly connected to a support seat (2), the top of the support seat (2) is fixedly connected to a workbench (3), the top of the workbench (3) is detachably connected to a lower mold core (4), the top of the bottom plate (1) is fixedly connected to a support leg (5), the top of the support leg (5) is fixedly connected to a top plate (6), the bottom of the top plate (6) is fixedly connected to a hydraulic cylinder (7), the top of the output shaft of the hydraulic cylinder (7) is fixedly connected to a moving platform (8), the bottom of the moving platform (8) is detachably connected to an upper mold core (9), four guiding elastic devices (10) distributed in a rectangular array are provided between the upper mold core (9) and the lower mold core (4), and blowing devices (11) are provided at both ends of the support seat (2); The guide elastic device (10) comprises a transmission shaft (12) penetrating the movable platform (8) and the working platform (3); the movable platform (8) and the working platform (3) are fixedly connected to a limiting disc (13) on opposite sides; the limiting disc (13) is rotatably connected to a positioning body (14) on the outside; the positioning body (14) is threadedly connected to a semicircular plate (15) on the inner circumference; a limiting annular groove (16) is formed inside the semicircular plate (15); a spring (17) is slidably connected inside the limiting annular groove (16); first positioning holes (18) are formed at both ends of the spring (17); the semicircular plate (15) is away from the positioning body (14); A second positioning hole (19) is provided on one side of the spring (17); a positioning pin (20) is slidably connected inside the first positioning hole (18) and the second positioning hole (19); the positioning pin (20) is fitted with the limiting disc (13); an extruded rib (21) made of a rubber material component is slidably connected inside the limiting annular groove (16); the outer circumference of the extruded rib (21) is fitted with the spring (17); the inner circumference of the extruded rib (21) is fixedly connected with a limiting arc plate (22); the limiting arc plate (22) is fitted with the semicircular arc plate (15); and the limiting arc plate (22) is slidably connected with the transmission shaft (12); The blowing device (11) comprises a piston (23) threadedly connected to the bottom end of the transmission shaft (12); a gas compression column (24) is slidably connected to the outside of the piston (23); a three-way pipe (25) is fixedly connected to one side of the outer wall of the gas compression column (24); one end of the three-way pipe (25) is fixedly connected to an air suction check valve (26); the other end of the three-way pipe (25) is fixedly connected to a compressed gas storage column (27); the three-way pipe (25) is connected to the compressed gas storage column (27); An exhaust check valve (28) is fixedly connected to the middle of one end of the storage column (27), an outlet pipe (29) is fixedly connected to the top of the compressed gas storage column (27), a high-pressure nozzle (30) is fixedly connected to the end of the outlet pipe (29) away from the compressed gas storage column (27), and a solenoid valve (31) is fixedly connected to the middle of the outlet pipe (29), and the compressed gas storage column (27) and the gas compression column (24) are both fixedly connected to the bottom plate (1); The limiting arc plate (22) is pressed onto the surface of the semicircular arc plate (15) through the transmission shaft (12) to limit the spring (17) and prevent the spring from rotating in the semicircular arc plate (15). At the same time, when the movable platform (8) descends, it is ensured that there is no offset between the movable platform and the workbench (3), so as to prevent excessive force generated during stamping, thereby preventing the upper die core (9) and the lower die core (4) from offsetting and causing poor stamping quality. The guiding function is realized to improve the stamping accuracy.

2. A high-precision stamping die according to claim 1, characterized in that: The bottom of the inner cavity of the gas compression column (24) is fixedly connected to a limiting column (32), an arc-shaped hole (33) is opened at the bottom of the piston (23), and the limiting column (32) is slidably connected to the arc-shaped hole (33).

3. A high-precision stamping die according to claim 1, characterized in that: The top end of the transmission shaft (12) is fixedly connected with a hexagonal head (34), the transmission shaft (12) is threadedly connected to the movable platform (8), and the transmission shaft (12) is slidably connected to the workbench (3).

4. A high-precision stamping die according to claim 1, characterized in that: The hydraulic cylinder (7) is electrically connected to the electromagnetic valve (31); when the output shaft of the hydraulic cylinder (7) begins to extend, the electromagnetic valve (31) is closed; after the output shaft of the hydraulic cylinder (7) is shortened and reset, the electromagnetic valve (31) is opened.

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