Ball head hot heading forming die of ball head hanging ring

Abstract

The invention relates to the technical field of hot upsetting forming, in particular to a ball head hot upsetting forming die of a ball head hanging ring. Comprising a rack, a lower die assembly and an upper die assembly, the lower die assembly is fixedly arranged on the rack, the upper die assembly is located on the upper side of the lower die assembly and slidably connected with the rack, and an oil cylinder for driving the upper die assembly to move up and down is arranged on the rack; the lower die assembly comprises a lower die frame and a lower die, the lower die is fixedly arranged on the lower die frame through a lower die sleeve, two ball head forming cavities are formed in the upper end of the lower die, and the two ball head forming cavities are arranged in a staggered mode. And the lower die comprises a lower fixed die and a lower movable die. The two ball head hanging ring hot forging die cavities are formed in the die, and the two ball head hanging rings are formed in a staggered mode, so that the situation that stress is uneven in the die forming process can be reduced, and the service life of the die is prolonged.

Description

Technical Field

[0001] The invention relates to the technical field of hot upsetting, in particular to a ball head hot upsetting mould for a ball head hanging ring. Background Art

[0002] Hot upsetting is the process of plastic deformation of metal materials under high temperature conditions, which is usually used to manufacture parts with complex shapes or components that require specific mechanical properties. During the hot upsetting process, the metal is heated above its recrystallization temperature, making the material in a plastic state, so that it can be more easily formed into the desired shape while maintaining good ductility and toughness.

[0003] Due to the different difficulty levels of the structures at both ends of the ball head hanging ring, the force on both sides of the mold is uneven during the pressing process, which will affect the service life of the mold; the existing hot upsetting forming process has insufficient automation, which makes the loading, heating and other processes rely on manual operation, increasing labor intensity and reducing production continuity.

[0004] In the existing technology, some factories still use multi-degree-of-freedom robots for loading materials. Although they can replace manual loading, the cost of robots is too high, and it is difficult to promote their use for smaller manufacturers.

[0005] Therefore, it is necessary to improve the prior art. Summary of the invention

[0006] In order to overcome the deficiencies in the prior art, a ball head hot forging forming mold with a ball head hanging ring is provided, which has uniform mold force, is convenient for material cutting and has low cost.

[0007] In order to solve the above technical problems, the technical solution adopted by the present invention is: A ball head hot forging forming die for a ball head hanging ring, comprising a frame, a lower die assembly and an upper die assembly, wherein the lower die assembly is fixedly arranged on the frame, the upper die assembly is located on the upper side of the lower die assembly and is slidably connected to the frame, and an oil cylinder for driving the upper die assembly to move up and down is arranged on the frame; The lower mold assembly comprises a lower mold frame and a lower mold, wherein the lower mold is fixedly arranged on the lower mold frame through a lower mold sleeve, and two ball head forming cavities are arranged at the upper end of the lower mold, and the two ball head forming cavities are arranged in a staggered manner; the lower mold comprises a lower fixed mold and a lower movable mold, and the lower movable mold is slidably arranged in the lower fixed mold, and the lower movable mold is a rotating body structure, and an elastic return mechanism is arranged between the lower end of the lower movable mold and the lower mold frame, and in the initial state, the lower movable mold is higher than the lower fixed mold; The upper mold assembly comprises an upper mold frame and an upper mold, and the upper mold is fixedly arranged on the upper mold frame; When the oil cylinder drives the upper die assembly to move downward and assemble with the lower die assembly, the upper die pushes the lower movable die downward and forms a hot forging die cavity together with the lower movable die and the lower fixed die.

[0008] Preferably, the lower fixed mold is provided with a vertical through hole, a positioning sleeve is fixedly provided in the vertical through hole, the lower movable mold is arranged at the upper end of the positioning sleeve, the elastic return mechanism includes a return spring, and the return spring is arranged in the positioning sleeve. When the lower movable mold is pressed down, the lower end of the lower movable mold is pressed against the positioning sleeve.

[0009] Preferably, the side surface of the lower movable mold is uniformly provided with a plurality of heat dissipation holes along the circumferential direction, and when the lower movable mold is not in contact with the upper mold, the heat dissipation holes are not in contact with the lower fixed mold; The heat dissipation air holes are connected to a heat dissipation fan.

[0010] Preferably, it also includes a feeding device and an electromagnetic induction heating device, the electromagnetic induction heating device is located on one side of the frame, the feeding device includes a clamp, the clamp clamps the forging blank, and after the forging blank is heated by the electromagnetic induction heating device, the feeding device places the forging blank on the lower die.

[0011] Preferably, it also includes a preheating mechanism, which includes a synchronous belt feeding mechanism and a preheating sleeve that runs through the middle, the synchronous belt feeding mechanism is located at the lower end of the preheating sleeve, and a plurality of raw material containing boxes for placing forging blanks are arranged at the upper end of the synchronous belt feeding mechanism. The middle part of the synchronous belt feeding mechanism is a hollow structure, and a lifting device is arranged at the lower end of the synchronous belt feeding mechanism, and the lifting device is located directly below the preheating sleeve. When the lifting device is working, the raw material containing box on the synchronous belt feeding mechanism is pushed into the preheating sleeve.

[0012] Preferably, a one-way limiting structure is provided at the lower end of the preheating sleeve to prevent the raw material containing box from descending; and an electric heating tube is provided inside the preheating sleeve.

[0013] Preferably, the loading device also includes a guide rail and a workbench moving along the guide rail, the workbench is provided with a multi-stage telescopic rod in the vertical direction, the clamp is arranged at the lower end of the multi-stage telescopic rod, and a driver for driving the clamp to pass through a preheating mechanism, an electromagnetic induction heating device, and a lower mold is arranged between the workbench and the guide rail.

[0014] Preferably, the clamp comprises a fixed ring and a slewing ring which are rotatably connected, two clamping plates I are fixedly arranged on the fixed ring, and the two clamping plates I are symmetrical about the center of the fixed ring, and a clamping plate II which matches with the clamping plate I is arranged on the slewing ring; The fixed ring is provided with a driving motor, the motor shaft of the driving motor is connected with a driving gear, and the outer side of the slewing ring is provided with a gear ring meshing with the driving gear.

[0015] Preferably, it also includes an air cooling device, which is arranged on one side of the frame, and a feeding device is arranged between the air cooling device and the lower mold.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention provides two ball head hanging ring hot forging cavities in the mold. By staggering the two ball head hanging rings, the uneven force during the mold forming process can be reduced and the service life of the mold can be increased.

[0017] 2. The present invention divides the lower mold into a lower fixed mold and a lower movable mold. After molding, the lower movable mold can lift up the ball head hanging ring for easy removal. The lower movable mold is provided with heat dissipation holes. When the ball head hanging ring is formed and lifted up, the mold can be cooled through the heat dissipation holes.

[0018] 3. The present invention is provided with a preheating mechanism, which can realize automatic feeding and cooperate with the feeding mechanism to realize the transfer of the forging blank from the preheating mechanism, the electromagnetic induction heating device, and the lower die, thereby reducing manual participation and improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the structure of the upper mold assembly; Figure 3 Schematic diagram of the lower movable mold structure; Figure 4 It is a schematic diagram of the structure of the feeding device; Figure 5 This is a schematic diagram of the preheating sleeve structure; Figure 6 This is a schematic diagram of the internal structure of the preheating sleeve; Figure 7 Schematic diagram of the clamp structure.

[0021] In the figure: 1-frame, 2-lower die assembly, 21-lower die frame, 22-lower die sleeve, 23-ball head forming cavity, 24-lower fixed die, 25-lower movable die, 26-positioning sleeve, 27-heat dissipation pores, 28-cooling fan, 3-upper die assembly, 31-upper die frame, 32-upper die, 4-oil cylinder, 5-elastic return mechanism, 6-feeding device, 61-clamp, 62-guide rail, 63-workbench, 64-multi-stage telescopic rod, 65-fixed ring, 66-slewing ring, 67-clamping plate I, 68-clamping plate II, 69-driving motor, 7-electromagnetic induction heating device, 8-raw material holding box, 81-forging billet, 9-preheating mechanism, 91-synchronous belt feeding mechanism, 92-preheating sleeve, 93-lifting device, 94-one-way limiting structure, 10-air cooling device, 101-unloading device. DETAILED DESCRIPTION

[0022] 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.

[0023] Example: like Figures 1 to 7 As shown, a ball head hot forging forming die for a ball head hanging ring comprises a frame 1, a lower die assembly 2 and an upper die assembly 3. The lower die assembly 2 is fixedly arranged on the frame 1, the upper die assembly 3 is located on the upper side of the lower die assembly 2 and is slidably connected to the frame 1, and a cylinder 4 for driving the upper die assembly 3 to move up and down is arranged on the frame 1. The hot forging forming is realized by splicing the upper die assembly 3 and the lower die assembly 4.

[0024] Specifically, the lower mold assembly 2 includes a lower mold frame 21 and a lower mold, and the lower mold is fixedly disposed on the lower mold frame 21 via a lower mold sleeve 22 .

[0025] In order to reduce the unbalanced force during the ball head hanging ring forming process, two ball head forming cavities 23 are provided at the upper end of the lower mold. The two ball head forming cavities 23 are staggered. Preferably, the two ball head forming cavities 23 are symmetrical relative to the centroid of the lower mold.

[0026] In order to facilitate the demolding of the ball head hanging ring after molding, the lower mold includes a lower fixed mold 24 and a lower movable mold 25. The lower movable mold 25 is slidably set in the lower fixed mold 24. An elastic return mechanism 5 is set between the lower end of the lower movable mold 25 and the lower mold frame 21. The lower mold 25 is supported by the elastic return mechanism 5. In the initial state, the lower movable mold 25 is higher than the lower fixed mold 24, so that the ball head hanging ring after press molding can be pushed out through the lower movable mold 25.

[0027] Preferably, the lower movable mold 25 adopts a rotating body structure to facilitate manufacturing, and the lower movable mold 25 corresponds to the circular ring of the ball head hanging ring.

[0028] The upper die assembly 3 includes an upper die frame 31 and an upper die 32. The upper die 32 is fixedly arranged on the upper die frame 31. When the oil cylinder 4 drives the upper die assembly 3 to move downward so that the upper die assembly 3 is assembled with the lower die assembly 2, the upper die 32 pushes the lower movable die 25 downward and forms a hot forging die cavity together with the lower movable die 25 and the lower fixed die 24. The forged blank is formed into a ball head hanging ring in the hot forging die cavity.

[0029] In order to facilitate the setting of the lower movable mold 25, the lower fixed mold 24 is provided with a vertical through hole, and a positioning sleeve 26 is fixedly provided in the vertical through hole. The lower movable mold 25 is arranged at the upper end of the positioning sleeve 26. The positioning sleeve 26 limits the maximum downward stroke of the lower movable mold 25 and ensures the assembly accuracy of the lower movable mold 25 and the lower fixed mold 24 when the upper mold assembly 3 is pressed.

[0030] Preferably, the elastic return mechanism 5 includes a return spring, which is disposed in the positioning sleeve 26 . When the lower movable mold 25 is pressed down, the lower end of the lower movable mold 25 is pressed against the positioning sleeve 26 .

[0031] Since the forging blank is in a high temperature state during hot upsetting, the temperature of the mold is relatively high. In order to dissipate the heat of the mold, a plurality of heat dissipation holes 27 are evenly distributed along the circumferential direction on the side of the lower movable mold 25. When the lower movable mold 25 is not in contact with the upper mold 32, the lower movable mold 2 rises under the action of the return spring, so that the heat dissipation holes 27 are not in contact with the lower fixed mold 24. The heat dissipation holes 27 are connected to a heat dissipation fan, which supplies air and discharges it through the heat dissipation holes 27 for air cooling.

[0032] In order to realize automatic feeding and heating, a preheating mechanism 9 is also provided, which includes a synchronous belt feeding mechanism 91 and a preheating sleeve 92 which runs through the middle. The synchronous belt feeding mechanism 91 is located at the lower end of the preheating sleeve 92, and a plurality of raw material containing boxes 8 containing forging blanks 81 are arranged at the upper end of the synchronous belt feeding mechanism 91, and each raw material containing box 8 contains two forging blanks.

[0033] The middle part of the synchronous belt feeding mechanism 91 is a hollow structure, and a lifting device 93 is provided at the lower end of the synchronous belt feeding mechanism 91. The lifting device 93 is located directly below the preheating sleeve 92. When there is a raw material containing box 8 above the lifting device 93, the lifting device 93 works and pushes the raw material containing box 8 on the synchronous belt feeding mechanism 91 into the preheating sleeve 92. Preferably, the lifting device 93 can adopt a linear motor.

[0034] A one-way limiting structure 94 is provided at the lower end of the preheating sleeve 92, and the one-way limiting structure 94 prevents the raw material containing box 8 in the preheating sleeve 92 from descending. An electric heating tube is provided in the preheating sleeve 92, and the preheating sleeve 92 and the forging blank therein are heated by the electric heating tube.

[0035] Preferably, the one-way limiting structure 94 may be a press-type wedge block.

[0036] This embodiment also includes a feeding device 6 and an electromagnetic induction heating device 7. The electromagnetic induction heating device 7 is located on one side of the frame 1. The electromagnetic induction heating device 7 is connected to a power supply and a controller, and the forging blank is heated to a predetermined temperature by the electromagnetic induction heating device 7. The feeding device 6 includes a guide rail 62, a workbench 63 moving along the guide rail 62, and a clamp 61. A multi-stage telescopic rod 64 is arranged on the workbench 63 in the vertical direction. The clamp 61 is arranged at the lower end of the multi-stage telescopic rod 64. The multi-stage telescopic rod 64 adopts an existing self-powered telescopic rod.

[0037] The clamp 61 clamps the forging blank 81 . After the forging blank 81 is heated by the electromagnetic induction heating device 7 , the loading device 6 places the forging blank 81 on the lower die.

[0038] In this embodiment, the clamp 61 includes a fixed ring 65 and a slewing ring 66 which are rotatably connected. In order to simultaneously clamp two forging blanks contained in the raw material containing box 8 and place them into the lower mold, two clamping plates I 67 are fixedly arranged on the fixed ring 65. The two clamping plates I 67 are symmetrical about the center of the fixed ring 65. The slewing ring 66 is provided with a clamping plate II 68 which matches with the clamping plate I 67. The fixed ring 65 is provided with a driving motor 69. The motor shaft of the driving motor 69 is connected with a driving gear. The outer side of the slewing ring 66 is provided with a gear ring which meshes with the driving gear. The driving gear is driven to rotate by the driving motor 69, and then the gear ring and the slewing ring 66 are driven to rotate, so that the clamping plate II 68 cooperates with the clamping plate I 67 to clamp the forging blank. The fixed ring 65 and the slewing ring 66 are both made of high temperature resistant materials that do not react with the electromagnetic induction heating device 7.

[0039] A driver for driving the clamp 61 to pass through the preheating mechanism 9, the electromagnetic induction heating device 7, and the lower mold is arranged between the workbench 63 and the guide rail 62. The driver can be a belt-driven roller or other existing device that can drive the slide to move along the guide rail.

[0040] In order to cool the ball head hanging ring after hot upsetting, this embodiment is further provided with an air cooling device 10, which is arranged on one side of the frame 1, and a feeding device 101 is arranged between the air cooling device 10 and the lower mold. Preferably, the feeding device 101 can adopt the same structure as the feeding device 6.

[0041] The above-mentioned embodiments are only preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. A ball head hot forging forming die for a ball head hanging ring, comprising a frame (1), a lower die assembly (2) and an upper die assembly (3), wherein the lower die assembly (2) is fixedly arranged on the frame (1), the upper die assembly (3) is located on the upper side of the lower die assembly (2) and is slidably connected to the frame (1), and an oil cylinder (4) is arranged on the frame (1) for driving the upper die assembly (3) to move up and down; the characteristics are: The lower mold assembly (2) comprises a lower mold frame (21) and a lower mold, the lower mold is fixedly arranged on the lower mold frame (21) via a lower mold sleeve (22), and two ball head forming cavities (23) are arranged at the upper end of the lower mold, and the two ball head forming cavities (23) are arranged in a staggered manner; the lower mold comprises a lower fixed mold (24) and a lower movable mold (25), the lower movable mold (25) is slidably arranged in the lower fixed mold (24), the lower movable mold (25) is a rotating body structure, and an elastic return mechanism (5) is arranged between the lower end of the lower movable mold (25) and the lower mold frame (21), and in an initial state, the lower movable mold (25) is higher than the lower fixed mold (24); The upper mold assembly (3) comprises an upper mold frame (31) and an upper mold (32), wherein the upper mold (32) is fixedly arranged on the upper mold frame (31); When the oil cylinder (4) drives the upper die assembly (3) to move downward and assemble with the lower die assembly (2), the upper die (32) pushes the lower movable die (25) to move downward and forms a hot forging die cavity together with the lower movable die (25) and the lower fixed die (24).

2. The hot forging forming die for a ball head of a ball head hanging ring according to claim 1, characterized in that: The lower fixed mold (24) is provided with a vertical through hole, a positioning sleeve (26) is fixedly provided in the vertical through hole, the lower movable mold (25) is arranged on the upper end of the positioning sleeve (26), the elastic return mechanism (5) comprises a return spring, and the return spring is arranged in the positioning sleeve (26). When the lower movable mold (25) is pressed down, the lower end of the lower movable mold (25) is tightly pressed against the positioning sleeve (26).

3. The hot forging forming die for a ball head of a ball head hanging ring according to claim 1, characterized in that: The side surface of the lower movable mold (25) is uniformly provided with a plurality of heat dissipation holes (27) along the circumferential direction, and when the lower movable mold (25) is not in contact with the upper mold (32), the heat dissipation holes (27) are not in contact with the lower fixed mold (24); The heat dissipation air holes (27) are connected to a heat dissipation fan.

4. The hot forging forming die for a ball head of a ball head hanging ring according to claim 1, characterized in that: The machine also comprises a loading device (6) and an electromagnetic induction heating device (7), wherein the electromagnetic induction heating device (7) is located on one side of the frame (1), and the loading device (6) comprises a clamp (61), wherein the clamp (61) clamps the forging blank (81), and after the forging blank (81) is heated by the electromagnetic induction heating device (7), the loading device (6) places the forging blank (81) on the lower die.

5. The hot forging forming die for a ball head of a ball head hanging ring according to claim 4, characterized in that: The invention also comprises a preheating mechanism (9), wherein the preheating mechanism (9) comprises a synchronous belt feeding mechanism (91) and a preheating sleeve (92) penetrating the middle thereof, wherein the synchronous belt feeding mechanism (91) is located at the lower end of the preheating sleeve (92), and a plurality of raw material containing boxes (8) containing forging blanks (81) are arranged at the upper end of the synchronous belt feeding mechanism (91), the middle portion of the synchronous belt feeding mechanism (91) is a hollow structure, and a lifting device (93) is arranged at the lower end of the synchronous belt feeding mechanism (91), wherein the lifting device (93) is located directly below the preheating sleeve (92), and when the lifting device (93) is in operation, the raw material containing boxes (8) on the synchronous belt feeding mechanism (91) are pushed into the preheating sleeve (92).

6. The hot forging forming die for a ball head of a ball head hanging ring according to claim 5, characterized in that: A one-way limiting structure (94) is provided at the lower end of the preheating sleeve (92) to prevent the raw material containing box (8) from descending; an electric heating tube is provided inside the preheating sleeve (92).

7. The hot forging forming die for a ball head of a ball head hanging ring according to claim 4, characterized in that: The loading device (6) further comprises a guide rail (62) and a workbench (63) moving along the guide rail (62); a multi-stage telescopic rod (64) is arranged on the workbench (63) in a vertical direction; the clamp (61) is arranged at the lower end of the multi-stage telescopic rod (64); and a driver for driving the clamp (61) to pass through the preheating mechanism (9), the electromagnetic induction heating device (7), and the lower mold is arranged between the workbench (63) and the guide rail (62).

8. The hot forging forming die for a ball head of a ball head hanging ring according to claim 4, characterized in that: The clamp (61) comprises a fixed ring (65) and a slewing ring (66) which are rotatably connected, two clamping plates I (67) are fixedly arranged on the fixed ring (65), the two clamping plates I (67) are symmetrical about the center of the fixed ring (65), and a clamping plate II (68) which matches the clamping plate I (67) is arranged on the slewing ring (66); The fixed ring (65) is provided with a driving motor (69), the motor shaft of the driving motor (69) is connected to a driving gear, and a gear ring meshing with the driving gear is provided on the outer side of the slewing ring (66).

9. The hot forging forming die for a ball head of a ball head hanging ring according to claim 1, characterized in that: It also comprises an air cooling and temperature reduction device (10), which is arranged on one side of the frame (1), and a material discharge device (101) is arranged between the air cooling and temperature reduction device (10) and the lower mold.

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