Warm upsetting forming equipment

Abstract

The invention provides a warm upsetting forming device. The warm upsetting forming device comprises a beam rod die, a beam rod pressing die and a hot-heading forming die, wherein the beam rod die is used for forming raw materials into beam rods for machining bolts; the pre-upsetting die is used for forming one end of the beam rod into a pre-upsetting part for processing a bolt head; the shaping mold is used for molding the pre-upset part into a bolt head blank; the shaping die is used for forming the bolt head blank into a finished bolt head blank; the final upsetting die is used for forming the bolt head finish blank into the bolt head; through continuous cooperation of multiple sets of dies, efficient and high-quality forming from raw materials to bolt heads is achieved, the production efficiency is improved, the product quality is improved, material loss is reduced, the service life of the dies is prolonged, follow-up machining is reduced, and the die is particularly suitable for batch production of high-strength bolts.

Description

Technical Field

[0001] The present invention relates to the technical field of metal material processing, and particularly to a warm forging forming device. Background Art

[0002] In the field of fastener manufacturing, especially in industries such as machinery, automotive, and aerospace, the demand for high-strength and high-quality bolts is increasing day by day. Traditional cold forging and hot forging processes have obvious deficiencies in manufacturing large-sized and high-strength fasteners: cold forging has high requirements for materials and limited equipment capabilities, while hot forging has problems such as low efficiency, large pollution, and unstable quality. These limitations have promoted the development of warm forging processes. By forging metal materials at a specific temperature, warm forging processes significantly improve the plasticity and forming ability of materials, and can better meet the manufacturing requirements of high-strength fasteners.

[0003] With the wide application of warm forging processes, mold design also faces higher requirements, including material selection, structural optimization, strength improvement, and precision control. Existing mold designs often have difficulty in balancing forming quality and mold life when dealing with high-strength materials such as superalloys. Summary of the Invention

[0004] The purpose of the present invention is to provide a warm forging forming device, which realizes efficient and high-quality forming from raw materials to bolt heads through the continuous cooperation of multiple sets of molds, improves production efficiency, enhances product quality, reduces material loss, extends mold life, and reduces subsequent processing, and is particularly suitable for mass production of high-strength bolts.

[0005] To achieve the above object, the technical solution of the present invention is realized as follows: The present invention provides a warm forging forming device, including: A rod bundling mold for forming raw materials into a rod bundle for processing bolts; A pre-forging mold for forming one end of the rod bundle into a pre-forging part for processing into a bolt head; A shaping mold for forming the pre-forging part into a bolt head blank; A sizing mold for forming the bolt head blank into a bolt head finish blank; A final forging mold for forming the bolt head finish blank into a bolt head.

[0006] Specifically, in this embodiment, it further includes a threading mold for threading a part of the rod bundle to form a screw.

[0007] Specifically, in this embodiment, the beam rod mold includes a beam rod bottom mold and a beam rod punching mold that cooperates with the beam rod bottom mold to complete the beam rod processing. The beam rod punching mold includes a beam rod punching mold main body, a beam rod punching mold ejector pin installed at the end of the punching mold main body, a beam rod inner pad installed on the side of the beam rod punching mold ejector pin, a beam rod punching mold rear pad installed at the other end of the punching mold main body, and a beam rod spring supported between the beam rod inner pad and the beam rod punching mold rear pad; the beam rod bottom mold includes a beam rod bottom mold main body, a beam rod bottom mold ejector pin installed at the end of the beam rod bottom mold main body, a beam rod ejector pin sleeve installed on the side of the beam rod bottom mold ejector pin, and a beam rod bottom mold rear pad installed at the other end of the beam rod bottom mold main body.

[0008] Specifically, in this embodiment, the pre-heading mold includes a pre-heading bottom mold and a pre-heading punching mold that cooperates with the pre-heading bottom mold to complete the pre-heading of the bolt head. The pre-heading punching mold includes a pre-heading punching mold main body, a pre-heading punching mold ejector pin installed at the end of the pre-heading punching mold main body, a pre-heading punching mold rear pad installed at the other end of the pre-heading punching mold main body, and a pre-heading inner pad supported between the pre-heading punching mold ejector pin and the pre-heading punching mold rear pad; the pre-heading bottom mold includes a pre-heading bottom mold main body, a pre-heading bottom mold ejector pin installed at the end of the pre-heading bottom mold main body, a pre-heading bottom mold rear pad installed at the other end of the pre-heading bottom mold main body, and a pre-heading ejector pin sleeve supported between the pre-heading bottom mold ejector pin and the pre-heading bottom mold rear pad.

[0009] Specifically, in this embodiment, the shaping mold includes a shaping bottom mold and a shaping punching mold that cooperates with the shaping bottom mold to complete the shaping of the bolt head blank. The shaping punching mold includes a shaping punching mold main body and a shaping punching mold rear pad installed at the end of the shaping punching mold main body; the shaping bottom mold includes a shaping bottom mold main body, a shaping bottom mold ejector pin installed at the end of the shaping bottom mold main body, a shaping bottom mold rear pad installed at the other end of the shaping bottom mold main body, and a shaping ejector pin sleeve supported between the shaping bottom mold ejector pin and the shaping bottom mold rear pad.

[0010] Specifically, in this embodiment, the sizing mold includes a sizing bottom mold and a sizing punching mold that cooperates with the sizing bottom mold to complete the sizing of the bolt head semi-finished product. The sizing punching mold includes a sizing punching mold main body, a sizing punching mold ejector pin installed at the end of the sizing punching mold main body, a sizing punching mold rear pad installed at the other end of the sizing punching mold main body, and a sizing inner pad supported between the sizing punching mold ejector pin and the sizing punching mold rear pad; the sizing bottom mold includes a sizing bottom mold main body, a sizing bottom mold ejector pin installed at the end of the sizing bottom mold main body, a sizing bottom mold rear pad installed at the other end of the sizing bottom mold, and a sizing ejector pin sleeve supported between the sizing bottom mold ejector pin and the sizing bottom mold rear pad.

[0011] Specifically, in this embodiment, the final upsetting die includes a final upsetting bottom die and a final upsetting punch die that cooperates with the final upsetting bottom die to complete the final upsetting of the bolt head. The final upsetting punch die includes a final upsetting punch die body, a final upsetting punch die thimble installed at the end of the final upsetting punch die body, a final upsetting punch die rear pad installed at the other end of the final upsetting punch die body, and a final upsetting inner pad supported between the final upsetting punch die thimble and the final upsetting punch die rear pad; the final upsetting bottom die includes a final upsetting bottom die body, a final upsetting bottom die thimble installed at the end of the final upsetting bottom die body, a final upsetting bottom die rear pad installed at the other end of the final upsetting bottom die body, and a final upsetting thimble sleeve supported between the final upsetting bottom die thimble and the final upsetting bottom die rear pad.

[0012] Specifically, in this embodiment, the warm upsetting forming device further includes a clamping mechanism for moving the processed raw material in the rod bundling die, the pre-upsetting die, the shaping die, the sizing die and the final upsetting die, and a control unit for controlling the clamping mechanism.

[0013] Specifically, in this embodiment, position sensors for detecting the position of the incoming material are provided in the pre-upsetting die, the shaping die, the sizing die and the final upsetting die, and the position sensors are communicatively connected to the control unit.

[0014] A bolt forming method is realized by the warm upsetting forming device according to any one of the embodiments described above. The bolt forming method includes: S1. Feed the raw material into the rod bundling die, and use the rod bundling die to form the raw material into a rod bundle for processing into a bolt. S2. Feed the rod bundle into the pre-upsetting die, and use the pre-upsetting die to form one end of the rod bundle into a pre-upsetting part for processing into a bolt head. S3. Feed the rod bundle into the shaping die, and use the shaping die to form the pre-upsetting part into a bolt head blank. S4. Feed the rod bundle into the sizing die, and use the sizing die to form the bolt head blank into a bolt head finish blank. S5. Feed the rod bundle into the final upsetting die, and use the final upsetting die to form the bolt head finish blank into a bolt head.

[0015] The present invention provides a warm forging forming device, comprising: a beam bar die for forming a raw material into a beam bar for processing bolts; a pre-forging die for forming one end of the beam bar into a pre-forged part for processing into a bolt head; a shaping die for forming the pre-forged part into a bolt head blank; a sizing die for forming the bolt head blank into a bolt head semi-finished blank; a final forging die for forming the bolt head semi-finished blank into a bolt head; through the continuous cooperation of multiple sets of dies, the efficient and high-quality forming from the raw material to the bolt head is realized, the production efficiency is improved, the product quality is enhanced, the material loss is reduced, the die life is prolonged, and the subsequent processing is reduced, which is particularly suitable for the mass production of high-strength bolts. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention, and thus should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0017] Figure 1 It is a schematic diagram of the overall structure of a warm forging process device provided by an embodiment of the present invention.

[0018] Figure 2 It is a processing flow chart of a bolt forming method provided by an embodiment of the present invention.

[0019] 1. Bundle rod mold; 11. Bundle rod punching die; 111. Bundle rod punching die ejector pin; 112. Bundle rod inner pad; 113. Bundle rod spring; 114. Bundle rod punching die rear pad; 115. Bundle rod punching die body; 12. Bundle rod bottom die; 121. Bundle rod bottom die rear pad; 122. Bundle rod bottom die ejector pin; 123. Bundle rod ejector pin sleeve; 124. Bundle rod bottom die body; 2. Pre-upsetting mold; 21. Pre-upsetting punching die; 211. Pre-upsetting punching die ejector pin; 212. Pre-upsetting inner pad; 213. Pre-upsetting punching die rear pad; 214. Pre-upsetting punching die body; 22. Pre-upsetting bottom die; 221. Pre-upsetting bottom die rear pad; 222. Pre-upsetting bottom die ejector pin; 223. Pre-upsetting ejector pin sleeve; 224. Pre-upsetting bottom die body; 3. Shaping mold; 31. Shaping punching die; 311. Shaping punching die rear pad; 312. Shaping punching die body; 32. Shaping bottom die; 321. Shaping bottom die rear pad; 322. Shaping bottom die ejector pin; 323. Shaping ejector pin sleeve; 324. Shaping bottom die body; 4. Sizing mold; 41. Sizing punching die; 411. Sizing punching die ejector pin; 412. Sizing inner pad; 413. Sizing punching die rear pad; 414. Sizing punching die body; 42. Sizing bottom die; 421. Sizing bottom die rear pad; 422. Sizing bottom die ejector pin; 423. Sizing ejector pin sleeve; 424. Sizing bottom die body; 5. Final upsetting mold; 51. Final upsetting punching die; 511. Final upsetting punching die ejector pin; 512. Final upsetting inner pad; 513. Final upsetting punching die rear pad; 514. Final upsetting punching die body; 52. Final upsetting bottom die; 521. Final upsetting bottom die rear pad; 522. Final upsetting bottom die ejector pin; 523. Final upsetting ejector pin sleeve; 524. Final upsetting bottom die body. Specific embodiments

[0020] The following will describe in detail specific embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the description of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts fall within the scope of protection of the present invention. In the description of the present invention, unless otherwise clearly defined and limited, terms such as "set", "installed", "connected", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0021] The orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the invention is customarily placed during use. It is only for the convenience of description and to simplify the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the present invention.

[0022] Terms such as "first", "second", "third", etc. are only used to distinguish elements with similar attributes, rather than indicating or implying relative importance or a specific order.

[0023] The term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion. In addition to the listed elements, it may also include other elements not specifically listed.

[0024] As Figure 1 shown, a preferred embodiment of the present invention provides a warm forging forming device, including: A beam rod die 1 for forming a raw material into a beam rod for processing bolts; A pre-forging die 2 for forming one end of the beam rod into a pre-forging part for processing a bolt head; A shaping die 3 for forming the pre-forging part into a bolt head blank; A sizing die 4 for forming the bolt head blank into a bolt head semi-finished product; A final forging die 5 for forming the bolt head semi-finished product into a bolt head.

[0025] In this embodiment, the beam rod die 1 is used to reduce the diameter of the rod part of the raw material and elongate it, laying a foundation for subsequent head forming; the pre-forging die 2 is used to provide a basic shape for subsequent precise head forming, avoiding defects such as cracks or wrinkles during subsequent forming; the shaping die 3 is used to ensure the forming of the head in the die through temperature control and pressure control, avoiding defects such as cracks and wrinkles; the sizing die 4 is used to prepare for the final forging of the head, ensuring the compliance of the head quality and appearance; the final forging die 5 is used to precisely control the flange thickness and flange diameter of the product head. The five sets of dies complete the continuous warm forging forming of the raw material through step-by-step cooperation. Each die corresponds to a specific forming step, ensuring the dimensional accuracy, surface quality and performance requirements of the product at each stage. This phased design significantly improves the processing efficiency, material utilization rate and product consistency, and is suitable for mass production of high-strength bolts.

[0026] In this embodiment, it further includes a threading die for threading a part of the shank to form a screw. The addition of the threading die enables the warm forging forming equipment to achieve integrated production from raw materials to complete bolts, significantly improving production efficiency, product quality, and material utilization rate.

[0027] In this embodiment, the shank die 1 includes a shank bottom die 12 and a shank punching die 11 that cooperates with the shank bottom die 12 to complete the shank processing. The shank punching die 11 includes a shank punching die body 115, a shank punching die ejector pin 111 installed at the end of the punching die body, a shank inner pad 112 installed on the side of the shank punching die ejector pin 111, a shank punching die rear pad 114 installed at the other end of the punching die body, and a shank spring 113 supported between the shank inner pad 112 and the shank punching die rear pad 114; the shank bottom die 12 includes a shank bottom die body 124, a shank bottom die ejector pin 122 installed at the end of the shank bottom die body 124, a shank ejector pin sleeve 123 installed on the side of the shank bottom die ejector pin 122, and a shank bottom die rear pad 121 installed at the other end of the shank bottom die body 124.

[0028] Specifically, the shank punching die body 115 is composed of the shank punching die ejector pin 111, the shank inner pad 112, the shank spring 113, and the shank punching die rear pad 114. These components are sequentially placed into the shank punching die body 115 to form the complete shank punching die 11; the shank bottom die body 124 is composed of the shank bottom die rear pad 121, the shank bottom die ejector pin 122, and the shank ejector pin sleeve 123. These components are sequentially placed into the shank bottom die body 124 to form the complete shank bottom die 12.

[0029] Specifically, the shank punching die 1 assembly applies pressure to the raw material through the cooperation of the shank punching die ejector pin 111 and the shank inner pad 112, enabling it to form a shank in the shank bottom die 12. In the preferred example of this embodiment, the necking of the shank bottom die 12 has a 5° taper angle, and the surface roughness of the cavity is Ra0.2.

[0030] In this embodiment, the pre-forging die 2 includes a pre-forging bottom die 22 and a pre-forging punching die 21 that cooperates with the pre-forging bottom die 22 to complete the pre-forging head. The pre-forging punching die 21 includes a pre-forging punching die body 214, a pre-forging punching die ejector pin 211 installed at the end of the pre-forging punching die body 214, a pre-forging punching die rear pad 213 installed at the other end of the pre-forging punching die body 214, and a pre-forging inner pad 212 supported between the pre-forging punching die ejector pin 211 and the pre-forging punching die rear pad 213; the pre-forging bottom die 22 includes a pre-forging bottom die body 224, a pre-forging bottom die ejector pin 222 installed at the end of the pre-forging bottom die body 224, a pre-forging bottom die rear pad 221 installed at the other end of the pre-forging bottom die body 224, and a pre-forging ejector pin sleeve 223 supported between the pre-forging bottom die ejector pin 222 and the pre-forging bottom die rear pad 221.

[0031] Specifically, the pre-upsetting die body 214 is composed of a pre-upsetting die ejector pin 211, a pre-upsetting inner pad 212, and a pre-upsetting die rear pad 213. These components are sequentially placed into the pre-upsetting die body 214 to form the completed pre-upsetting die 21. The pre-bottom die body 224 is composed of a pre-bottom die rear pad 221, a pre-bottom die ejector pin 222, and a pre-ejector pin sleeve 223. These components are sequentially placed into the pre-bottom die body 224 to form the completed pre-bottom die 22.

[0032] Specifically, through the cooperation of the pre-upsetting die ejector pin 211 and the pre-upsetting inner pad 212, the pre-upsetting die 21 extrudes and deforms the end part of the beam rod to form a preliminary head shape. The pre-bottom die 22 ensures the quality and precision of the pre-upset head through the cooperation of the pre-bottom die ejector pin 222 and the pre-ejector pin sleeve 223.

[0033] In this embodiment, the shaping die 3 includes a shaping bottom die 32 and a shaping punch die 31 that cooperates with the shaping bottom die 32 to complete the shaping of the bolt head blank. The shaping punch die 31 includes a shaping punch die body 312 and a shaping punch die rear pad 311 installed at the end of the shaping punch die body 312. The shaping bottom die 32 includes a shaping bottom die body 324, a shaping bottom die ejector pin 322 installed at the end of the shaping bottom die body 324, a shaping bottom die rear pad 321 installed at the other end of the shaping bottom die body 324, and a shaping ejector pin sleeve 323 supported between the shaping bottom die ejector pin 322 and the shaping bottom die rear pad 321.

[0034] Specifically, the shaping punch die is composed of a shaping punch die body 312 and a shaping punch die rear pad 311. The shaping bottom die body 324 is composed of a shaping bottom die rear pad 321, a shaping bottom die ejector pin 322, and a shaping ejector pin sleeve 323. These components are sequentially placed into the shaping bottom die body 324 to form the completed shaping bottom die 32.

[0035] Specifically, through the cooperation of the shaping punch die 31 and the shaping bottom die 32, the pre-upset head is further shaped to form a cylindrical shape. By controlling the temperature and pressure, it is ensured that the head is formed in the die.

[0036] In this embodiment, the sizing die 4 includes a sizing bottom die 42 and a sizing punch die 41 that cooperates with the sizing bottom die 42 to complete the sizing of the bolt head semi-finished product. The sizing punch die 41 includes a sizing main body, a sizing punch die ejector pin 411 installed at the end of the sizing main body, a sizing punch die rear pad 413 installed at the other end of the sizing punch die body 414, and a sizing inner pad 412 supported between the sizing punch die ejector pin 411 and the sizing punch die rear pad 413. The sizing bottom die 42 includes a sizing bottom die body 424, a sizing bottom die ejector pin 422 installed at the end of the sizing bottom die 42, a sizing bottom die rear pad 421 installed at the other end of the sizing bottom die, and a sizing ejector pin sleeve 423 supported between the sizing bottom die ejector pin 422 and the sizing bottom die rear pad 421.

[0037] Specifically, the sizing die body 414 is composed of a sizing die ejector pin 411, a sizing inner pad 412, and a sizing die rear pad 413. These components are sequentially placed into the sizing die body 414 to form the completed sizing die 41; the sizing bottom die 42 body is composed of a sizing bottom die rear pad 421, a sizing bottom die ejector pin 422, and a sizing ejector pin sleeve 423. These components are sequentially placed into the sizing bottom die body 424 to form the completed sizing bottom die 42.

[0038] Specifically, through the cooperation of the sizing die 41 and the sizing bottom die 42, the hexagon and outer diameter dimensions of the head are adjusted to prepare for the final upsetting of the head.

[0039] In this embodiment, the final upsetting die 5 includes a final upsetting bottom die 52 and a final upsetting die 51 that cooperates with the final upsetting bottom die 52 to complete the final upsetting of the bolt head. The final upsetting die 51 includes a final upsetting die body 514, a final upsetting die ejector pin 511 installed at the end of the final upsetting die body 514, a final upsetting die rear pad 513 installed at the other end of the final upsetting die body 514, and a final upsetting inner pad 512 supported between the final upsetting die ejector pin 511 and the final upsetting die rear pad 513; the final upsetting bottom die 52 includes a final upsetting bottom die body 524, a final upsetting bottom die ejector pin 522 installed at the end of the final upsetting bottom die body 524, a final upsetting bottom die rear pad 521 installed at the other end of the final upsetting bottom die body 524, and a final upsetting ejector pin sleeve 523 supported between the final upsetting bottom die ejector pin 522 and the final upsetting bottom die rear pad 521.

[0040] Specifically, the final upsetting die body 514 is composed of a final upsetting die ejector pin 511, a final upsetting inner pad 512, and a final upsetting die rear pad 513. These components are sequentially placed into the final upsetting die body 514 to form the completed final upsetting die 51; the final upsetting bottom die body 524 is composed of a final upsetting bottom die rear pad 521, a final upsetting bottom die ejector pin 522, and a final upsetting ejector pin sleeve 523. These components are sequentially placed into the final upsetting bottom die body 524 to form the completed final upsetting bottom die 52.

[0041] Specifically, through the cooperation of the final upsetting die 51 and the final upsetting bottom die 52, the final hexagonal flange forming of the product is carried out. The key at this stage is to precisely control the flange thickness and flange diameter of the product head by adjusting the distance between the die and the bottom die, and at the same time control the outer diameter and length dimensions of the bolt rod part through the bottom die.

[0042] In this embodiment, the warm upsetting forming equipment further includes a clamping mechanism for moving the processed raw materials among the bundling die 1, the pre-upsetting die 2, the shaping die 3, the sizing die 4, and the final upsetting die 5, and a control unit for controlling the clamping mechanism. The control unit ensures the rapid and accurate transfer of materials between the dies by adjusting the actions of the clamping mechanism in real time, further shortening the production cycle.

[0043] Specifically, position sensors for detecting the position of the incoming material are provided inside the pre-heading die 2, shaping die 3, sizing die 4, and final-heading die 5. The position sensors are communicatively connected to the control unit. The control unit adjusts the actions of the clamping mechanism based on the feedback from the sensors to ensure the forming quality of each process and improve the consistency and reliability of the products.

[0044] Specifically, the addition of the clamping mechanism and the control unit enables the warm-heading forming equipment to achieve automatic transfer and precise positioning of the material, significantly improving production efficiency, product quality, and equipment utilization rate. The communicative connection between the position sensors and the control unit ensures the accurate positioning of the material in each die, avoiding forming defects and being particularly suitable for mass production of high-strength bolts.

[0045] An embodiment of another aspect of the present application provides a bolt forming method, the flowchart of which is as Figure 2 shown, and is implemented by the warm-heading forming equipment provided in this embodiment, including: S1. The control unit controls the actions of the clamping mechanism to ensure that the clamping mechanism feeds the raw material into the bundling die 1. The bundling die forms the raw material into a bundling rod for processing into a bolt through the cooperation of the bundling punch die 11 and the bundling bottom die 12. The position sensor detects whether the raw material accurately enters the bundling die 1 and feeds back the signal to the control unit; S2. The clamping mechanism takes out the bundling rod from the bundling die 1 and feeds it into the pre-heading die 2. The control unit adjusts the position and speed of the clamping mechanism according to the feedback from the position sensor to ensure that the bundling rod accurately enters the pre-heading die 2, and uses the pre-heading die 2 to form one end of the bundling rod into a pre-heading part for processing into a bolt head; S3. The clamping mechanism takes out the bundling rod after pre-heading from the pre-heading die 2 and feeds it into the shaping die 3. The control unit adjusts the position and speed of the clamping mechanism according to the feedback from the position sensor to ensure that the bundling rod accurately enters the shaping die 3, and uses the shaping die 3 to form the pre-heading part into a bolt head blank; S4. The clamping mechanism takes out the shaped bundling rod from the shaping die 3 and feeds it into the sizing die 4. The control unit adjusts the position and speed of the clamping mechanism according to the feedback from the position sensor to ensure that the bundling rod accurately enters the sizing die 4, and uses the sizing die 4 to form the bolt head blank into a bolt head fine blank; S5. The clamping mechanism takes out the sized bundling rod from the sizing die 5 and feeds it into the final-heading die 5. The control unit adjusts the position and speed of the clamping mechanism according to the feedback from the position sensor to ensure that the bundling rod accurately enters the final-heading die 5, and uses the final-heading die 5 to form the bolt head fine blank into a bolt head.

[0046] S6. The clamping mechanism takes out the bolt after final upsetting forming from the final upsetting die 5 and feeds it into the thread die. The thread die processes precise threads on the shank part through rolling or thread rolling process to form the screw rod.

[0047] S7. The bolt after thread processing is subjected to a cooling treatment to eliminate the stress generated during the processing; and the qualified bolts are packaged.

[0048] The present invention provides a warm upsetting forming device, including: a shank die 1 for forming the raw material into a shank for processing bolts; a pre-upsetting die 2 for forming one end of the shank into a pre-upsetting part for processing into a bolt head; a shaping die 3 for forming the pre-upsetting part into a bolt head blank; a sizing die 4 for forming the bolt head blank into a bolt head finish blank; a final upsetting die 5 for forming the bolt head finish blank into a bolt head. Through the continuous cooperation of multiple sets of dies, the efficient and high-quality forming from the raw material to the bolt head is realized, improving production efficiency, enhancing product quality, reducing material loss, prolonging die life and reducing subsequent processing, and is particularly suitable for the mass production of high-strength bolts.

[0049] As described above, it is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of changes or substitutions, which should all be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claimed rights.

Claims

1. A warm upsetting forming device, characterized in that: include: A tie rod mold (1) is used to mold a raw material into a tie rod for processing a bolt; A pre-upsetting die (2) is used to form one end of the tie rod into a pre-upsetting portion for processing into a bolt head; A shaping die (3) for shaping the pre-upset portion into a bolt head blank; A shaping die (4) is used to shape the bolt head blank into a bolt head fine blank; The final upsetting die (5) is used for forming the bolt head blank into a bolt head.

2. The warm upsetting forming equipment according to claim 1, characterized in that: Also included is a threading die for threading a portion of the bundle rod to form a screw rod.

3. The warm upsetting forming equipment according to claim 1, characterized in that: The rod-binding die (1) comprises a rod-binding bottom die (12) and a rod-binding die (11) that cooperates with the rod-binding bottom die (12) to complete rod-binding processing, wherein the rod-binding die (11) comprises a rod-binding die body (115), a rod-binding die ejector pin (111) mounted at the end of the die body, a rod-binding inner pad (112) mounted at the side of the rod-binding die ejector pin (111), a rod-binding die rear pad (114) mounted at the other end of the die body, and a support A tie rod spring (113) is provided between the tie rod inner pad (112) and the tie rod punching die rear pad (114); the tie rod bottom die (12) comprises a tie rod bottom die body (124), a tie rod bottom die ejector pin (122) mounted at the end of the tie rod bottom die body (124), a tie rod ejector pin sleeve (123) mounted on the side of the tie rod bottom die ejector pin (122), and a tie rod bottom die rear pad (121) mounted at the other end of the tie rod bottom die body (124).

4. The warm upsetting forming equipment according to claim 1, characterized in that: The pre-upsetting die (2) comprises a pre-upsetting bottom die (22) and a pre-upsetting punch die (21) that cooperates with the pre-upsetting bottom die (22) to complete a pre-upsetting head, the pre-upsetting punch die (21) comprising a pre-upsetting punch die body (214), a pre-upsetting punch die ejector pin (211) mounted at the end of the pre-upsetting punch die body (214), a pre-upsetting punch die rear pad (213) mounted at the other end of the pre-upsetting punch die body (214), and a pre-upsetting punch die support (213) supported between the pre-upsetting punch die ejector pin (211) and the pre-upsetting punch die body (214). The pre-upsetting die (22) comprises a pre-upsetting die main body (224), a pre-upsetting die ejector pin (222) mounted at the end of the pre-upsetting die main body (224), a pre-upsetting die rear pad (221) mounted at the other end of the pre-upsetting die main body (224), and a pre-upsetting die ejector pin sleeve (223) supported between the pre-upsetting die ejector pin (222) and the pre-upsetting die rear pad (221).

5. The warm upsetting forming equipment according to claim 1, characterized in that: The shaping mold (3) comprises a shaping bottom mold (32) and a shaping punch (31) that cooperates with the shaping bottom mold (32) to complete a bolt head blank, the shaping punch (31) comprising a shaping punch body (312) and a shaping punch back pad (311) mounted at the end of the shaping punch body (312); the shaping bottom mold (32) comprises a shaping bottom mold body (324), a shaping bottom mold ejector pin (322) mounted at the end of the shaping bottom mold body (324), a shaping bottom mold back pad (321) mounted at the other end of the shaping bottom mold body (324), and a shaping ejector pin sleeve (323) supported between the shaping bottom mold ejector pin (322) and the shaping bottom mold back pad (321).

6. The warm upsetting forming equipment according to claim 1, characterized in that: The shaping die (4) comprises a shaping bottom die (42) and a shaping punch (41) that cooperates with the shaping bottom die (42) to complete a bolt head blank, the shaping punch (41) comprising a shaping punch body (414), a shaping punch ejector pin (411) mounted at the end of the shaping punch body (414), a shaping punch back pad (413) mounted at the other end of the shaping punch body (414), and a support between the shaping punch ejector pin (411) and the shaping punch back pad (413). The shaping die (42) comprises a shaping die main body (424), a shaping die ejector pin (422) mounted at the end of the shaping die main body (424), a shaping die rear pad (421) mounted at the other end of the shaping die main body (424), and a shaping die ejector sleeve (423) supported between the shaping die ejector pin (422) and the shaping die rear pad (421).

7. The warm upsetting forming equipment according to claim 1, characterized in that: The final upsetting die (5) comprises a final upsetting bottom die (52) and a final upsetting punch die (51) that cooperates with the final upsetting bottom die (52) to complete the bolt head; the final upsetting punch die (51) comprises a final upsetting punch body (514), a final upsetting punch ejector pin (511) mounted at the end of the final upsetting punch body (514), a final upsetting punch rear pad (513) mounted at the other end of the final upsetting punch body (514), and a support plate (514) supported between the final upsetting punch ejector pin (511) and the bolt head. The final forging inner pad (512) is provided between the final forging punching die rear pad (513); the final forging bottom die (52) comprises a final forging bottom die body (524), a final forging bottom die ejector pin (522) mounted at the end of the final forging bottom die body (524), a final forging bottom die rear pad (521) mounted at the other end of the final forging bottom die body (524), and a final forging ejector pin sleeve (523) supported between the final forging bottom die ejector pin (522) and the final forging bottom die rear pad (521).

8. The warm upsetting forming equipment according to claim 1, characterized in that: The warm upsetting forming equipment further comprises a clamping mechanism for moving the processed raw material between the beam-binding die (1), the pre-upsetting die (2), the shaping die (3), the shaping die (4) and the final upsetting die (5), and a control unit for controlling the clamping mechanism.

9. The warm upsetting forming equipment according to claim 8, characterized in that: The pre-upsetting die (2), the shaping die (3), the shaping die (4) and the final upsetting die (5) are all provided with position sensors for detecting the incoming material, and the position sensors are in communication connection with the control unit.

10. A bolt forming method, implemented by the warm upsetting forming equipment according to any one of claims 1 to 9, the bolt forming method comprising: S1, feeding the raw material into the tie rod mold (1), and using the tie rod mold to shape the raw material into a tie rod for processing into a bolt; S2, feeding the bundle rod into the pre-upsetting die (2), and using the pre-upsetting die (2) to shape one end of the bundle rod into a pre-upsetting portion for processing into a bolt head; S3, feeding the tie rod into the shaping mold (3), and using the shaping mold (3) to shape the pre-upset portion into a bolt head blank; S4, sending the tie rod into the shaping mold (4), and using the shaping mold (4) to shape the bolt head blank into a bolt head fine blank; S5, sending the bundle rod into the final upsetting die (5), and using the final upsetting die (5) to form the bolt head blank into a bolt head.

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