A demoulding device and demoulding method for stamping die

Abstract

A demoulding device for a stamping die comprises an upper die seat, a lower die seat and a demoulding beam, wherein both the upper die seat and the lower die seat are box structures, an upper die is arranged on the bottom surface of the upper die seat, a lower die is arranged on the top surface of the lower die seat, rectangular long openings are provided on the left and right plates of the lower die seat, a demoulding beam passes through the two rectangular long openings in the left and right directions and is arranged in the lower die seat, a plurality of top die columns are arranged on the top surface of the demoulding beam, a plurality of demoulding holes are arranged on the top plate and the lower die of the lower die seat, the top end of each top die column is correspondingly inserted into each demoulding hole, a hanging ring is arranged on the left and right sides of the upper die seat, a demoulding support rod assembly is connected to each hanging ring through a steel wire rope, and two demoulding support rod assemblies are symmetrically supported and arranged on the left and right sides of the bottom surface of the demoulding beam. The present invention has simple structure, convenient processing, reliable operation, no need to set up a special driving device, and reduces energy consumption.

Description

Technical Field

[0001] The invention belongs to the technical field of stamping dies, and in particular relates to a demoulding device and a demoulding method of a stamping die. Background Art

[0002] Stamping is a forming method that uses a press and a die to apply external force to plates, strips, pipes and profiles to cause plastic deformation or separation, thereby obtaining a workpiece (stamping part) of the desired shape and size. The blanks for stamping are mainly hot-rolled and cold-rolled steel plates and strips. After the stamping process of the workpiece is completed, the workpiece is often still embedded in the lower die. At present, there are two main ways of demolding. One is that the staff uses special tools to pry the parts out of the die, and the other is to set up a special mechanism to push the stamped workpiece out under the action of hydraulic, pneumatic or motor driving forces. The former is time-consuming and labor-intensive, and the demolding efficiency is low; the latter often requires an independent drive device to provide driving force, and the structure and control of the demolding mechanism are relatively complex. When a hydraulically driven demolding mechanism is used, there are also problems such as environmental pollution caused by hydraulic oil leakage and high energy consumption. Summary of the invention

[0003] The purpose of the present invention is to provide a demoulding device for a stamping die and a demoulding method thereof. The present invention has a simple structure, is easy to process, and works reliably. It does not require a special driving device to be set up, thereby reducing energy consumption.

[0004] To achieve the above object, the present invention adopts the following technical solution:

[0005] A demoulding device for a stamping die comprises an upper die seat, a lower die seat and a demoulding crossbeam. Both the upper die seat and the lower die seat are box structures. The upper die seat is located directly above the lower die seat. The bottom surface of the upper die seat is provided with an upper die. The top surface of the lower die seat is provided with a lower die that is adapted to be crimped with the upper die up and down. The upper edges of the left and right plates of the lower die seat are vertically provided with rectangular long openings corresponding to the left and right. The demoulding crossbeam passes through the two rectangular long openings in the left and right directions and is penetrated in the lower die seat. The left end of the demoulding crossbeam passes through the rectangular long opening on the left to the left and extends out of the left side of the lower die seat. The demoulding The right end of the beam passes through the rectangular long opening on the right and extends out of the right side of the lower mold base. A number of top mold columns are arranged at left and right intervals on the top surface of the demoulding beam. A number of demoulding holes which are arranged at left and right intervals and correspond to each other up and down are opened on the top plate of the lower mold base and the lower mold. The top end of each top mold column is respectively inserted into each demoulding hole. The left and right sides of the upper mold base are provided with lifting rings, and each lifting ring is connected to a demoulding support rod assembly by a steel wire rope. The two demoulding support rod assemblies are symmetrically supported on the left and right sides of the bottom surface of the demoulding beam.

[0006] The left and right parts of the bottom surface of the demoulding beam are respectively integrally formed with two left-right symmetrical raised stoppers, a first slot is opened in the middle of the left end of the demoulding beam, which is open on the upper side, lower side and left side, and a second slot is opened in the middle of the right end of the demoulding beam, which is open on the upper side, lower side and right side, the raised stopper on the left side is located on the right side of the first slot, and the raised stopper on the right side is located on the left side of the second slot.

[0007] Two vertical baffles arranged front and back are fixedly connected to the left and right plates of the lower mold base. The two vertical baffles on the left are respectively located on the front and back sides of the rectangular long opening on the left, and the two vertical baffles on the right are respectively located on the front and back sides of the rectangular long opening on the right. The left side parts of the lower sides of the two vertical baffles on the left are inclined with the left side higher and the right side lower. The right side parts of the lower sides of the two vertical baffles on the right are inclined with the right side higher and the left side lower. The left end of the demoulding beam is located on the right side of the left sides of the two vertical baffles on the left, and the right end of the demoulding beam is located on the left side of the right side of the two vertical baffles on the right.

[0008] The two lifting rings on the upper mold base are symmetrically arranged on the left and right, the lifting ring on the left is located on the right side just above the raised stopper on the left, and the lifting ring on the right is located on the left side just above the raised stopper on the right, the upper end of the steel wire rope on the left is bound to the lifting ring on the left, the steel wire rope on the left is tilted and arranged with the left lower and the right higher, and passes through the middle and the first notch of the two vertical baffles on the left, the lower end of the steel wire rope on the left is bound to the demoulding support rod assembly on the left, the demoulding support rod assembly on the left is arranged below the left side portion of the demoulding beam and located on the left side of the raised stopper on the left, the upper end of the steel wire rope on the right is bound to the lifting ring on the right, the steel wire rope on the right is tilted and arranged with the right lower and the left higher, and passes through the middle and the second notch of the two vertical baffles on the right, the lower end of the steel wire rope on the right is bound to the demoulding support rod assembly on the right, the demoulding support rod assembly on the right is arranged below the right side portion of the demoulding beam and located on the right side of the raised stopper on the right.

[0009] The two demoulding support rod assemblies have the same structure and are symmetrically arranged on the left and right. The demoulding support rod assembly on the left includes a load-bearing shaft and two friction ring cylinders. The center line of the load-bearing shaft is horizontally arranged in the front-to-back direction. An annular boss is integrally formed on the middle outer circumference of the load-bearing shaft. An annular groove is circumferentially arranged in the middle of the outer circumference of the annular boss. The lower end of the left wire rope is wound in the annular groove and bound to the load-bearing shaft. The two friction ring cylinders are respectively symmetrically rotated on the left and right outer circumferences of the load-bearing shaft through needle bearings. Bearing end covers for clamping the inner rings of needle bearings are fixedly installed on the left and right end surfaces of the load-bearing shaft. The length of the load-bearing shaft is greater than the distance between the two vertical baffles on the left. The load-bearing shaft is arranged below the left side of the demoulding beam and on the left side of the raised block on the left. The upper side surfaces of the two friction ring cylinders are in pressing contact with the left side of the bottom surface of the demoulding beam.

[0010] A demoulding method for a demoulding device of a stamping die specifically comprises the following steps:

[0011] (1) After the stamping process of the parts is completed, the two demoulding support rod assemblies are symmetrically placed on the left and right sides of the bottom surface of the demoulding beam, the left demoulding support rod assembly is arranged below the left side of the demoulding beam and located on the left side of the left raised stopper, and the right demoulding support rod assembly is arranged below the right side of the demoulding beam and located on the right side of the right raised stopper;

[0012] (2) Start the press of the stamping die. The piston rod of the press of the stamping die drives the upper die seat to move upward. The upper die seat starts to drive the upper die to move vertically upward. The steel wire ropes tied to the two lifting rings start to pull the corresponding left and right demoulding support rod assemblies upward. Since the traction force applied by the left steel wire rope to the left demoulding support rod assembly is upward along the length direction of the left steel wire rope, and the traction force applied by the left steel wire rope to the left demoulding support rod assembly is located on the right side of the contact point between the left demoulding support rod assembly and the demoulding beam (point A), the tension of the left steel wire rope on the left demoulding support rod assembly is equivalent to applying a torque rotating to the right relative to the contact point between the left demoulding support rod assembly and the demoulding beam (point A). The two friction ring cylinders of the support rod assembly tend to rotate rightward under the traction of the left steel wire rope. Since the left demoulding support rod assembly is constrained by the demoulding beam and the left stopper, the left demoulding support rod assembly can only drive the left side portion of the demoulding beam located on the upper side of the left demoulding support rod assembly to move upward under the traction of the left steel wire rope. Similarly, the right demoulding support rod assembly drives the right side portion of the demoulding beam located on the upper side of the right demoulding support rod assembly to move upward under the traction of the right steel wire rope. In this way, under the bearing action of the two demoulding support rod assemblies, the demoulding beam moves upward with the upper mold base, and the top end of each top mold column will pass through the corresponding demoulding holes upward to press the stamping parts embedded in the lower mold, so that the stamping parts are slowly pushed upward, and demoulding is performed in this way.

[0013] (3) As the two demoulding support rod assemblies drive the demoulding crossbeam to move upward to a certain height, the upper side surfaces of the two friction ring cylinders of the left demoulding support rod assembly begin to contact the left side portions of the lower sides of the two vertical baffles on the left. At this time, the traction force applied by the left steel wire rope to the left demoulding support rod assembly is still upward along the length direction of the left steel wire rope, and the traction force applied by the left steel wire rope to the left demoulding support rod assembly is located on the left side of the contact point (point B) between the left demoulding support rod assembly and the left side portions of the lower sides of the two vertical baffles on the left. Therefore, the tension of the left steel wire rope on the left demoulding support rod assembly is equivalent to applying a torque rotating to the left relative to the contact point (point B) between the left demoulding support rod assembly and the left side portions of the lower sides of the two vertical baffles on the left. Since the left side portions of the lower sides of the two vertical baffles on the left are tilted with the left side higher and the right side lower, the left demoulding support rod assembly The two friction ring cylinders will rotate to the upper left along the left side of the lower side of the two vertical baffles on the left side under the traction of the left steel wire rope. At this time, the two friction ring cylinders of the left demoulding support rod assembly are still in contact with the left side of the bottom surface of the demoulding beam (point C). Therefore, when the left demoulding support rod assembly rotates to the upper left, it will still move the left side of the demoulding beam upward. Similarly, the two friction ring cylinders of the right demoulding support rod assembly will rotate to the upper right along the left side of the lower side of the two vertical baffles on the right side under the traction of the right steel wire rope. At this time, the two friction ring cylinders of the right demoulding support rod assembly are still in contact with the right side of the bottom surface of the demoulding beam. Therefore, when the right demoulding support rod assembly rotates to the upper right, it will still move the right side of the demoulding beam upward. Under the bearing action of the two demoulding support rod assemblies, the demoulding beam continues to move upward with the upper mold base to continue demoulding.

[0014] (4) As the two demoulding support rod assemblies drive the demoulding beam to continue to move upward to a certain height, the two friction ring cylinders of the left demoulding support rod assembly continue to rotate to the upper left along the left side of the lower side of the two vertical baffles on the left under the traction of the left wire rope. When the left demoulding support rod assembly moves to the contact point (point D) with the left side of the lower side of the two vertical baffles on the left, the left side of the bottom surface of the demoulding beam is separated from the left demoulding support rod assembly. Similarly, the right side of the bottom surface of the demoulding beam is separated from the right demoulding support rod assembly. In this way, the demoulding beam will lose the support of the two demoulding support rod assemblies and fall back to the initial position. At this time, each top mold column will eject the stamping part from the lower mold, and finally complete the entire demoulding process;

[0015] (5) Before the next stamping process, it is only necessary to return the two demoulding support rod assemblies to their original positions so that the two demoulding support rod assemblies support the left and right sides of the bottom surface of the demoulding beam respectively, and repeat the above steps (1)-(4) to realize the demoulding process as described above again.

[0016] The present invention has outstanding substantive features and significant progress compared to the prior art. Specifically, the present invention has the following advantages:

[0017] 1. The present invention adopts a purely mechanical structure, which is simple in structure, convenient in processing and reliable in operation. The present invention can be added to the entire stamping die by only making appropriate modifications to the upper die base and the lower die base of the stamping die, without making significant adjustments to the structure of the die itself, and is suitable for a variety of stamping processing occasions.

[0018] 2. The present invention does not require a special driving device. The driving force for demoulding is provided by the piston rod of the press of the stamping die driving the upper die seat to move upward, thereby greatly simplifying the structure of the demoulding device of the stamping die, improving the reliability of the demoulding work and reducing energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a cross-sectional view of the overall structure of the present invention;

[0020] Figure 2 It is an axonometric view of the overall structure of the present invention;

[0021] Figure 3 It is a structural schematic diagram of the demoulding support rod assembly in the present invention;

[0022] Figure 4 It is a structural schematic diagram of the initial position of demoulding of the present invention;

[0023] Figure 5 It is a schematic diagram of the structure of the middle position of demoulding of the present invention;

[0024] Figure 6 It is a structural schematic diagram of the final demoulding position of the present invention. DETAILED DESCRIPTION

[0025] The embodiments of the present invention are further described below with reference to the accompanying drawings.

[0026] like Figure 1-6As shown, a demoulding device of a stamping die comprises an upper die base 1, a lower die base 2 and a demoulding crossbeam 3. Both the upper die base 1 and the lower die base 2 are box structures. The upper die base 1 is located directly above the lower die base 2. An upper die 4 is arranged on the bottom surface of the upper die base 1. A lower die 5 which is adapted and crimped with the upper die 4 is arranged on the top surface of the lower die base 2. Left and right corresponding rectangular long openings 6 are vertically opened on the upper edges of the left and right plates of the lower die base 2. The demoulding crossbeam 3 passes through the two rectangular long openings 6 in the left and right directions and is penetrated in the lower die base 2. The left end of the demoulding crossbeam 3 passes through the rectangular long opening 6 on the left side to the left and extends out of the left side of the lower die base 2. The right end of the mold beam 3 extends to the right through the rectangular long opening 6 on the right side and extends out of the right side of the lower mold base 2. A number of top mold columns 7 are arranged at left and right intervals on the top surface of the demoulding beam 3. A number of demoulding holes 8 are opened on the top plate of the lower mold base 2 and the lower mold 5, which are arranged at left and right intervals and correspond to each other up and down. The top end of each top mold column 7 is respectively inserted into each demoulding hole 8. The left and right sides of the upper mold base 1 are provided with hanging rings 9. Each hanging ring 9 is connected to a demoulding support rod assembly 21 through a steel wire rope 10. The two demoulding support rod assemblies 21 are symmetrically supported on the left and right sides of the bottom surface of the demoulding beam 3.

[0027] The left and right parts of the bottom surface of the demoulding beam 3 are respectively integrally formed with two left-right symmetrical raised stoppers 11, a first notch 12 is opened in the middle of the left end of the demoulding beam 3, and the second notch 13 is opened in the middle of the right end of the demoulding beam 3, which is open on the upper side, the lower side and the right side. The raised stopper 11 on the left side is located on the right side of the first notch 12, and the raised stopper 11 on the right side is located on the left side of the second notch 13.

[0028] Two vertical baffles 14 arranged side by side front and back are fixedly connected to the left and right plates of the lower mold base 2. The two vertical baffles 14 on the left are respectively located on the front and back sides of the rectangular long opening 6 on the left, and the two vertical baffles 14 on the right are respectively located on the front and back sides of the rectangular long opening 6 on the right. The left side parts of the lower sides of the two vertical baffles 14 on the left are tilted with the left side higher and the right side lower. The right side parts of the lower sides of the two vertical baffles 14 on the right are tilted with the right side higher and the left side lower. The left end of the demoulding beam 3 is located on the right side of the left side of the two vertical baffles 14 on the left, and the right end of the demoulding beam 3 is located on the left side of the right side of the two vertical baffles 14 on the right.

[0029] The two lifting rings 9 on the upper mold base 1 are symmetrically arranged on the left and right sides, the lifting ring 9 on the left side is located on the right side just above the raised stopper 11 on the left side, and the lifting ring 9 on the right side is located on the left side just above the raised stopper 11 on the right side, the upper end of the steel wire rope 10 on the left side is bound to the lifting ring 9 on the left side, the steel wire rope 10 on the left side is tilted and arranged with the left side lower than the right side and passes through the middle of the two vertical baffles 14 on the left side and the first notch 12, the lower end of the steel wire rope 10 on the left side is bound to the demoulding support rod assembly 21 on the left side, and the demoulding support rod assembly 21 on the left side is arranged with the left side lower than the right side and the right side higher, and passes through the middle of the two vertical baffles 14 on the left side and the first notch 12, and the lower end of the steel wire rope 10 on the left side is bound to the demoulding support rod assembly 21 on the left side. Part 21 is arranged at the lower part of the left side of the demoulding beam 3 and is located on the left side of the left raised stopper 11. The upper end of the right steel wire rope 10 is bound to the right lifting ring 9. The right steel wire rope 10 is arranged obliquely with the right side lower and the left side higher and passes through the middle of the two vertical baffles 14 on the right and the second notch 13. The lower end of the right steel wire rope 10 is bound to the right demoulding support rod assembly 21. The right demoulding support rod assembly 21 is arranged at the lower part of the right side of the demoulding beam 3 and is located on the right side of the raised stopper 11.

[0030] The two demoulding support rod assemblies 21 have the same structure and are symmetrically arranged on the left and right. The demoulding support rod assembly on the left includes a load-bearing shaft 15 and two friction ring cylinders 16. The center line of the load-bearing shaft 15 is horizontally arranged in the front-to-back direction. An annular boss 17 is integrally formed on the middle outer circumference of the load-bearing shaft 15. An annular groove 18 is circumferentially arranged in the middle of the outer circumference of the annular boss 17. The lower end of the steel wire rope 10 on the left is wound in the annular groove 18 and bound to the load-bearing shaft 15. The two friction ring cylinders 16 are respectively symmetrically rotated on the left and right outer circumferences of the load-bearing shaft 15 through needle bearings 19. The left and right end surfaces of the load-bearing shaft 15 are fixedly installed with bearing end covers 20 for pressing the inner ring of the needle bearing 19. The length of the load-bearing shaft 15 is greater than the distance between the two vertical baffles 14 on the left. The load-bearing shaft 15 is arranged below the left side of the demoulding beam 3 and is located on the left side of the raised stopper 11 on the left. The upper side surfaces of the two friction ring cylinders 16 are pressed and contacted with the left side of the bottom surface of the demoulding beam 3.

[0031] A demoulding method for a demoulding device of a stamping die specifically comprises the following steps:

[0032] (1) Two demoulding support rod assemblies are respectively and symmetrically placed on the left and right sides of the bottom surface of the demoulding beam 3, the left demoulding support rod assembly is arranged below the left side of the demoulding beam 3 and located on the left side of the left raised stopper 11, and the right demoulding support rod assembly is arranged below the right side of the demoulding beam 3 and located on the right side of the right raised stopper 11;

[0033] (2) Start the press of the stamping die. The piston rod of the press of the stamping die drives the upper die seat 1 to move upward. The upper die seat 1 starts to drive the upper die 4 to move vertically upward. The steel wire ropes 10 tied to the two lifting rings 9 start to pull the corresponding left and right demoulding support rod assemblies 21 upward. Since the traction force applied by the left steel wire rope 10 to the left demoulding support rod assembly 21 is upward along the length direction of the left steel wire rope 10, and the traction force applied by the left steel wire rope 10 to the left demoulding support rod assembly 21 is located on the right side of the contact point (point A) between the left demoulding support rod assembly 21 and the demoulding crossbeam 3, the tension of the left steel wire rope 10 on the left demoulding support rod assembly 21 is equivalent to applying a torque rotating to the right relative to the contact point (point A) between the left demoulding support rod assembly 21 and the demoulding crossbeam 3. The two friction ring cylinders 16 of 21 tend to rotate rightward under the traction of the left wire rope 10. Since the left demoulding support rod assembly 21 is constrained by the demoulding cross beam 3 and the left stopper 11, the left demoulding support rod assembly 21 can only drive the left side portion of the demoulding cross beam 3 located on the upper side of the left demoulding support rod assembly 21 to move upward under the traction of the left wire rope 10. Similarly, the right demoulding support rod assembly 21 drives the right side portion of the demoulding cross beam 3 located on the upper side of the right demoulding support rod assembly 21 to move upward under the traction of the right wire rope 10. In this way, under the bearing action of the two demoulding support rod assemblies 21, the demoulding cross beam 3 moves upward with the upper mold base 1, and the top end of each top mold column 7 will pass through the corresponding demoulding holes 8 upward to press the stamping part 22 embedded in the lower mold 5, so that the stamping part 22 is slowly pushed upward, and demoulding is performed in this way.

[0034] (3) As the two demoulding support rod assemblies 21 drive the demoulding crossbeam 3 to move upward to a certain height, the upper side surfaces of the two friction ring cylinders 16 of the left demoulding support rod assembly 21 begin to contact the left side portions of the lower sides of the two vertical baffles 14 on the left. At this time, the traction force applied by the left steel wire rope 10 to the left demoulding support rod assembly 21 is still upward along the length direction of the left steel wire rope 10, and the traction force applied by the left steel wire rope 10 to the left demoulding support rod assembly 21 is located at the left side. The demoulding support rod assembly 21 is on the left side of the contact point (point B) between the left side and the lower side of the two vertical baffles 14. Therefore, the tension of the left wire rope 10 on the left side is equivalent to applying a torque to rotate leftward relative to the contact point (point B) between the left side and the lower side of the two vertical baffles 14. Since the left side of the lower side of the two vertical baffles 14 is tilted with the left side higher and the right side lower, the left demoulding support rod assembly 21 The two friction ring cylinders 16 will rotate to the upper left along the left side of the lower side of the two vertical baffles 14 on the left side under the traction of the left wire rope 10. Because at this time, the two friction ring cylinders 16 of the left demoulding support rod assembly 21 are still in contact with the left side of the bottom surface of the demoulding beam 3 (point C), so when the left demoulding support rod assembly 21 rotates to the upper left, it will still move the left side of the demoulding beam 3 upward. Similarly, the two friction ring cylinders 16 of the right demoulding support rod assembly 21 will rotate to the upper right along the right side of the lower side of the two vertical baffles 14 on the right side under the traction of the right wire rope 10. Because at this time, the two friction ring cylinders 16 of the right demoulding support rod assembly 21 are still in contact with the right side of the bottom surface of the demoulding beam 3, so when the right demoulding support rod assembly 21 rotates to the upper right, it will still move the right side of the demoulding beam 3 upward. Under the bearing action of the two demoulding support rod assemblies 21, the demoulding beam 3 continues to move upward with the upper mold base 1 to continue demoulding.

[0035] (4) As the two demoulding support rod assemblies 21 drive the demoulding beam 3 to continue to move upward to a certain height, the two friction ring cylinders 16 of the left demoulding support rod assembly 21 continue to rotate to the upper left along the left side of the lower side of the two vertical baffles 14 on the left under the traction of the left wire rope 10. When the left demoulding support rod assembly 21 moves to the contact point (point D) with the left side of the lower side of the two vertical baffles 14 on the left, the left side of the bottom surface of the demoulding beam 3 is separated from the left demoulding support rod assembly 21. Similarly, the right side of the bottom surface of the demoulding beam 3 is separated from the right demoulding support rod assembly 21. In this way, the demoulding beam 3 will lose the support of the two demoulding support rod assemblies 21 and fall back to the initial position. At this time, each top mold column 7 will eject the stamping part 22 from the lower mold 5, and finally complete the entire demoulding process.

[0036] (5) Before the next stamping process, it is only necessary to put the two demoulding support rod assemblies 21 back to the initial position so that the two demoulding support rod assemblies 21 can support the left and right sides of the bottom surface of the demoulding beam 3 respectively, and repeat the above steps (1)-(4) to realize the demoulding process as described above again.

[0037] The above embodiments are only used to illustrate rather than limit the technical solutions of the present invention. Although the present invention is described in detail with reference to the above embodiments, those skilled in the art should understand that the present invention can still be modified or replaced by equivalents. Any modification or partial replacement that does not depart from the spirit and scope of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A demoulding device for a stamping die, characterized in that: The upper die base comprises an upper die base, a lower die base and a demoulding cross beam. The upper die base is located directly above the lower die base. The bottom surface of the upper die base is provided with an upper die. The top surface of the lower die base is provided with a lower die that is adapted to be crimped with the upper die up and down. The left and right upper edges of the lower die base are vertically provided with rectangular long openings corresponding to the left and right. The demoulding cross beam passes through the two rectangular long openings in the left and right directions and is arranged in the lower die base. The left end of the demoulding cross beam passes through the rectangular long opening on the left to the left and extends out of the left side of the lower die base. The right end of the demoulding cross beam passes through the rectangular long opening on the right to the right. The long opening of the shape extends out to the right side of the lower die seat, and a plurality of top die columns are arranged at intervals on the left and right sides of the top surface of the demoulding beam. A plurality of demoulding holes are opened on the top plate of the lower die seat and the lower die, which are arranged at intervals on the left and right sides and are corresponding to each other up and down. The top of each top die column is respectively inserted into each demoulding hole. The left and right sides of the upper die seat are provided with lifting rings, and each lifting ring is connected to a demoulding support rod assembly through a steel wire rope. The two demoulding support rod assemblies are respectively symmetrically supported on the left and right sides of the bottom surface of the demoulding beam; The left and right parts of the bottom surface of the demoulding beam are respectively integrally formed with two left-right symmetrical raised stoppers, the middle part of the left end of the demoulding beam is provided with a first notch which is open on the upper side, the lower side and the left side, and the middle part of the right end of the demoulding beam is provided with a second notch which is open on the upper side, the lower side and the right side, the raised stopper on the left side is located on the right side of the first notch, and the raised stopper on the right side is located on the left side of the second notch; Two vertical baffles arranged side by side in front and back are fixedly connected to the left and right plates of the lower die base, the two vertical baffles on the left are respectively located at the front and back sides of the rectangular long opening on the left, and the two vertical baffles on the right are respectively located at the front and back sides of the rectangular long opening on the right, the left side portions of the lower sides of the two vertical baffles on the left are inclined with the left side higher and the right side lower, and the right side portions of the lower sides of the two vertical baffles on the right are inclined with the right side higher and the left side lower, the left end of the demoulding crossbeam is located at the right side of the left side of the two vertical baffles on the left, and the right end of the demoulding crossbeam is located at the left side of the right side of the two vertical baffles on the right; The two lifting rings on the upper mold base are symmetrically arranged on the left and right, the lifting ring on the left is located on the right side just above the raised stopper on the left, and the lifting ring on the right is located on the left side just above the raised stopper on the right, the upper end of the steel wire rope on the left is bound to the lifting ring on the left, the steel wire rope on the left is tilted so as to be lower on the left and higher on the right and passes through the middle and the first notch of the two vertical baffles on the left, the lower end of the steel wire rope on the left is bound to the demoulding support rod assembly on the left, the demoulding support rod assembly on the left is arranged below the left side portion of the demoulding cross beam and is located on the left side of the raised stopper on the left, the upper end of the steel wire rope on the right is bound to the lifting ring on the right, the steel wire rope on the right is tilted so as to be lower on the right and higher on the left and passes through the middle and the second notch of the two vertical baffles on the right, the lower end of the steel wire rope on the right is bound to the demoulding support rod assembly on the right, the demoulding support rod assembly on the right is arranged below the right side portion of the demoulding cross beam and is located on the right side of the raised stopper on the right; The two demoulding support rod assemblies have the same structure and are symmetrically arranged on the left and right. The demoulding support rod assembly on the left includes a load-bearing shaft and two friction ring cylinders. The center line of the load-bearing shaft is horizontally arranged in the front-to-back direction. An annular boss is integrally formed on the middle outer circumference of the load-bearing shaft. An annular groove is circumferentially arranged in the middle of the outer circumference of the annular boss. The lower end of the left wire rope is wound in the annular groove and bound to the load-bearing shaft. The two friction ring cylinders are respectively symmetrically rotated on the left and right outer circumferences of the load-bearing shaft through needle bearings. Bearing end covers for clamping the inner rings of needle bearings are fixedly installed on the left and right end surfaces of the load-bearing shaft. The length of the load-bearing shaft is greater than the distance between the two vertical baffles on the left. The load-bearing shaft is arranged below the left side of the demoulding beam and on the left side of the raised block on the left. The upper side surfaces of the two friction ring cylinders are in pressing contact with the left side of the bottom surface of the demoulding beam.

2. The demoulding method of the demoulding device of the stamping die according to claim 1, characterized in that: The specific steps include: (1) After the stamping process of the parts is completed, the two demoulding support rod assemblies are symmetrically placed on the left and right sides of the bottom surface of the demoulding beam, the left demoulding support rod assembly is arranged below the left side of the demoulding beam and located on the left side of the left raised stopper, and the right demoulding support rod assembly is arranged below the right side of the demoulding beam and located on the right side of the right raised stopper; (2) Start the press of the stamping die. The piston rod of the press of the stamping die drives the upper die seat to move upward. The upper die seat starts to drive the upper die to move vertically upward. The steel wire ropes tied to the two lifting rings start to pull the corresponding left and right demoulding support rod assemblies upward. Since the traction force applied by the left steel wire rope to the left demoulding support rod assembly is upward along the length direction of the left steel wire rope, and the traction force applied by the left steel wire rope to the left demoulding support rod assembly is located on the right side of the contact point between the left demoulding support rod assembly and the demoulding crossbeam, the tension of the left steel wire rope on the left demoulding support rod assembly is equivalent to applying a torque rotating to the right relative to the contact point between the left demoulding support rod assembly and the demoulding crossbeam. The left demoulding support rod assembly The two friction ring cylinders tend to rotate rightward under the traction of the left steel wire rope. Since the left demoulding support rod assembly is constrained by the demoulding cross beam and the left stopper, the left demoulding support rod assembly can only drive the left side portion of the demoulding cross beam located on the upper side of the left demoulding support rod assembly to move upward under the traction of the left steel wire rope. Similarly, the right demoulding support rod assembly drives the right side portion of the demoulding cross beam located on the upper side of the right demoulding support rod assembly to move upward under the traction of the right steel wire rope. In this way, under the bearing action of the two demoulding support rod assemblies, the demoulding cross beam moves upward with the upper mold base, and the top end of each top mold column will pass through the corresponding demoulding holes upward to press the stamping parts embedded in the lower mold, so that the stamping parts are slowly lifted upward, and demoulding is performed in this way. (3) As the two demoulding support rod assemblies drive the demoulding crossbeam to move upward to a certain height, the upper side surfaces of the two friction ring cylinders of the left demoulding support rod assembly begin to contact the left side portions of the lower sides of the two vertical baffles on the left. At this time, the traction force applied by the left steel wire rope to the left demoulding support rod assembly is still upward along the length direction of the left steel wire rope, and the traction force applied by the left steel wire rope to the left demoulding support rod assembly is located on the left side of the contact point between the left demoulding support rod assembly and the left side portions of the lower sides of the two vertical baffles on the left. Therefore, the tension of the left steel wire rope on the left demoulding support rod assembly is equivalent to applying a torque rotating to the left relative to the contact point between the left demoulding support rod assembly and the left side portions of the lower sides of the two vertical baffles on the left. Since the left side portions of the lower sides of the two vertical baffles on the left are tilted with the left side higher and the right side lower, the two When the left side is moved upward, the left side of the demoulding support rod assembly is moved upward, and the left side of the demoulding support rod assembly is moved upward, so that the left side of the demoulding support rod assembly can move upward, and the right side of the demoulding support rod assembly can move upward, and ... (4) As the two demoulding support rod assemblies drive the demoulding beam to continue to move upward to a certain height, the two friction ring cylinders of the left demoulding support rod assembly continue to rotate to the upper left along the left side of the lower side of the two vertical baffles on the left under the traction of the left wire rope. When the left demoulding support rod assembly moves to the contact point with the left side of the lower side of the two vertical baffles on the left, the left side of the bottom surface of the demoulding beam is separated from the left demoulding support rod assembly. Similarly, the right side of the bottom surface of the demoulding beam is separated from the right demoulding support rod assembly. In this way, the demoulding beam will lose the support of the two demoulding support rod assemblies and fall down, returning to the initial position. At this time, each top mold column will eject the stamping part from the lower mold, and finally complete the entire demoulding process; (5) Before the next stamping process, it is only necessary to return the two demoulding support rod assemblies to their original positions so that the two demoulding support rod assemblies support the left and right sides of the bottom surface of the demoulding beam respectively, and repeat the above steps (1)-(4) to realize the demoulding process as described above again.

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