Cold heading forming machining process for high-strength bolt

Abstract

The invention relates to a high-strength bolt cold heading forming machining technology, and belongs to the field of cold heading machining. The high-strength bolt cold heading forming machining technology comprises the following steps that S1, a raw material is cut into a blank with the preset length through a cutting mechanism on a rack; s2, the blank is transferred to the rear mold of the blank processed for the first time through a transfer mechanism, a bolt processed and formed on the rear mold processed for the last time is discharged from the rear mold through the transfer mechanism, and meanwhile, material parts on the other rear molds are transferred to the rear mold processed for the next time through the transfer mechanism; and S3, the multiple front dies are simultaneously driven through a stamping mechanism to conduct stamping forming on the material parts on the multiple rear dies correspondingly. The bolt cold heading forming device has the beneficial effects that the time consumed for transferring and feeding materials on the same rear mold is shortened, and the machining efficiency of bolt cold heading forming is effectively improved.

Description

Technical Field

[0001] The present application relates to the field of cold heading processing, and in particular to a cold heading forming processing technology for high-strength bolts. Background Art

[0002] Traditional bolt manufacturing is usually done by hot upsetting or warm upsetting. Although these two methods can achieve the desired geometric shape through plastic deformation of materials, they have problems such as high energy consumption, increased costs, and easy generation of surface oxide layers. Therefore, some bolt manufacturers have begun to try to use cold upsetting technology to make bolts, using the plastic deformation of metals under external forces, and with the help of molds, redistribute and transfer the metal volume to form the required parts or blanks.

[0003] At present, in order to ensure the quality of the formed bolts, when cold heading is used to process bolts, it is usually necessary to divide the process into multiple steps, and use different molds each time to gradually process the raw materials into bolts. During each processing, the raw materials are clamped and placed in the mold by a clamp. After the stamping is completed, the stamped material is clamped out of the mold by the clamp, and then the material is placed in the next mold for processing. The clamp then places the material to be processed into this mold. The whole process requires the clamp to clamp and transfer the material multiple times, which is time-consuming and leads to low efficiency of the entire bolt cold heading process. Summary of the invention

[0004] In order to improve the processing efficiency of cold heading of bolts, the present application provides a high-strength bolt cold heading processing technology.

[0005] The present application provides a high-strength bolt cold heading forming process using the following technical solutions: A high-strength bolt cold heading forming process comprises the following steps: S1: The raw material is cut into blanks of preset length by the cutting mechanism on the frame; S2: The blank is transferred to the rear mold of the first processing blank by the transfer mechanism, and the bolts formed on the rear mold of the last processing are unloaded from the rear mold by the transfer mechanism, and the remaining parts on the rear mold are transferred to the rear mold of the next processing by the transfer mechanism; S3: The punching mechanism simultaneously drives the plurality of front dies to punch and form the materials on the plurality of rear dies respectively.

[0006] By adopting the above technical scheme, after the stamping mechanism drives multiple front dies to stamp and form the materials on multiple rear dies respectively, the transfer mechanism transfers the materials processed on the rear die to the rear die for the next processing, and at the same time loads the blank onto the rear die for the first processing of the blank, and at the same time unloads the bolts processed on the rear die for the last processing. The transfer mechanism loads the blank, transfers the materials on the rear die, and unloads them simultaneously, so that multiple cold heading processes of the bolts can be carried out continuously, reducing the time consumption of transferring and loading the materials on the same rear die, and effectively improving the processing efficiency of cold heading of the bolts.

[0007] Optionally, the transfer mechanism includes a bracket, a movable seat, a lifting seat, a first driving member, a second driving member, a third driving member and a clamp, a plurality of rear molds are arranged at intervals in the same direction on the frame, the bracket is slidably arranged on the frame along the direction of arrangement of the plurality of rear molds, the movable seat is slidably arranged on the bracket along the direction of arrangement of the plurality of rear molds, the lifting seat is slidably arranged on the movable seat along the vertical direction, the first driving member is arranged on the frame and used to drive the bracket to slide, the second driving member is arranged on the bracket and used to drive the movable seat to slide, the third driving member is arranged on the movable seat and used to drive the lifting seat to slide, a plurality of clamps are arranged at intervals in the same direction on the lifting seat, the clamps are used to clamp the blank or the material, and the arrangement spacing of the plurality of clamps is the same as the arrangement spacing of the plurality of rear molds.

[0008] By adopting the above technical scheme, the first driving member drives the frame to move the bracket to the top of multiple rear molds, and then the third driving member drives the lifting seat to descend, so that the multiple clamps on the lifting seat are respectively aligned with the blank and the materials on the multiple rear molds. After the clamps clamp the blank or the materials, the third driving member drives the lifting seat to rise, and the lifting seat drives the multiple clamps to rise and clamp the blank and the multiple materials. The second driving member drives the movable seat to slide along the arrangement direction of the multiple rear molds, and the movable seat drives the clamp to slide along the arrangement direction of the multiple rear molds, so that the blank can be clamped to the top of the first processed rear mold, and the materials can be clamped to the top of the subsequent processed rear mold, and the bolts on the last processed rear mold can be clamped away, and the third driving member drives the lifting seat to move downward again, so that the blank and the materials can be unloaded onto the subsequent processed rear mold, and the bolts on the last processed rear mold can be unloaded, thereby conveniently and quickly realizing the loading of the blank, the loading of multiple materials to the next processed rear mold, and the unloading of the bolts on the last processed rear mold.

[0009] Optionally, the clamp includes a clamping plate and a double-headed cylinder, wherein two clamping plates are slidably arranged on a lifting seat, and the double-headed cylinder is arranged on the lifting seat and is used to drive the two clamping plates to move closer to or away from each other.

[0010] By adopting the above technical solution, after the lifting seat drives the two clamps to move to the two sides of the blank or the workpiece, the piston rod of the double-headed cylinder is retracted, driving the two clamps to move closer to each other, and the two clamps can clamp the blank or the workpiece.

[0011] Optionally, the stamping mechanism includes a stamping seat and a stamping cylinder, the stamping seat is slidably set on a bracket, a plurality of front molds are spaced apart on the stamping seat, the plurality of front molds are respectively adapted to the plurality of rear molds, and the stamping cylinder is set on the bracket and is used to drive the stamping seat to slide toward the rear mold.

[0012] By adopting the above technical solution, after the blanks and parts are transferred to multiple rear dies respectively, the bracket drives the multiple front dies to move to the top of the multiple rear dies respectively, the stamping cylinder is started, and the stamping cylinder drives the stamping seat to move in the direction toward the rear die. The stamping seat can drive the multiple front dies to stamp the parts or blanks on the multiple rear dies respectively.

[0013] Optionally, the rear mold is provided with a positioning mechanism for positioning the material, the positioning mechanism includes a wedge and a control component, a plurality of wedges are slidably provided on the inner wall of the mold, the plurality of wedges slide in directions approaching each other to clamp the material, and the control component is provided on the rear mold and is used to drive the plurality of wedges to approach or move away from each other.

[0014] By adopting the above technical solution, after the material is transferred to the rear mold, the control component drives multiple wedges to approach each other, and the multiple wedges can clamp the material, and then position the material on the rear mold, effectively improving the stability of the material on the rear mold and improving the processing effect.

[0015] Optionally, the control assembly includes a pressure block and a return spring, wherein the pressure block is slidably disposed on the rear mold and is used to press the multiple wedges toward each other, and the return spring is disposed on the rear mold and is used to drive the multiple wedges away from each other.

[0016] By adopting the above technical solution, when the stamping cylinder drives the front die to approach the rear die for stamping, the front die abuts against multiple wedges and drives the multiple wedges to approach each other to clamp the material. After the stamping is completed, the front die moves away from the rear die, and the return spring drives the multiple wedges away from each other. The multiple wedges release the material, making it easier to remove the stamped material later.

[0017] Optionally, the cutting mechanism includes a feeding assembly, a cutting seat, a cutting assembly and a positioning assembly, the feeding assembly is arranged on the frame and is used to feed the raw material, the cutting seat is arranged on the frame and is used for the raw material to pass through, the cutting assembly is arranged on the frame and is used to cut the raw material passing through the cutting seat, and the positioning assembly is arranged on the frame and is used to position the blank formed by cutting.

[0018] By adopting the above technical solution, the feeding component feeds the raw material to pass through the cutting seat. After the raw material passing through the cutting seat reaches a preset length, the cutting component cuts the raw material extending out of the cutting seat to form a blank. The positioning component then positions the blank. Positioning the blank at a set position makes it easier for the clamp to clamp the blank and improves the accuracy of the clamp's clamping position for the blank.

[0019] Optionally, the feeding assembly includes an unwinding roller, a straightening roller, a driving roller and a driving motor. The unwinding roller is rotatably arranged on a frame and is used to place a material tray. A plurality of straightening rollers are arranged in two rows on the frame at intervals. The driving roller is arranged on the frame. The driving motor is arranged on the frame and is used to drive the driving roller to rotate. The raw material on the material tray is passed between the two rows of straightening rollers and wrapped around the driving roller.

[0020] By adopting the above technical solution, the driving motor drives the driving roller to rotate, and the driving roller pulls the raw material to move through the friction between the driving roller and the raw material, so that the raw material on the unwinding roller is continuously released, and then after being straightened by multiple straightening rollers, it is moved to the cutting seat to improve the straightness of the raw material after being released, which is convenient for subsequent processing.

[0021] Optionally, the cutting assembly includes a cutting cylinder and a cutting knife, wherein the cutting cylinder is arranged on a frame, and the cutting knife is slidably arranged on a cutting seat and connected to a piston rod of the cutting cylinder.

[0022] By adopting the above technical solution, the cutting cylinder is started, the piston rod of the cutting cylinder is extended, and the cutter is driven to move toward the direction of the raw material, so that the raw material can be cut according to the preset length.

[0023] Optionally, the positioning assembly includes a push plate, a positioning cylinder, a vertical plate and a standing cylinder, two push plates are slidably arranged on the frame, the positioning cylinder is arranged on the frame and is used to drive the two push plates to approach each other, the vertical plate is hingedly arranged on the frame, the vertical plate is located between the two push plates and has the same spacing as the two push plates, the standing cylinder is hingedly arranged on the frame, and the piston rod of the standing cylinder is hinged to the vertical plate.

[0024] By adopting the above technical solution, after the raw material is cut to form a blank, the positioning cylinder drives the two push plates to approach each other, and the two push plates can push the blank onto the vertical plate between the two push plates. Then the piston rod of the standing cylinder extends, driving the vertical plate to rotate away from the frame. The vertical plate drives the blank to rotate away from the frame, and cooperates with the push plates to clamp the blank, so that the blank is erected on the frame, which is convenient for the subsequent clamp to clamp the blank vertically.

[0025] In summary, the present application includes at least one of the following beneficial technical effects: 1. The loading of blanks, transfer of materials on the rear die and unloading are carried out simultaneously, so that multiple cold heading processes of bolts can be carried out continuously, reducing the time consumption of transferring and loading materials on the same rear die, and effectively improving the processing efficiency of bolt cold heading; 2. Multiple wedges can clamp the material and then position it on the rear mold, effectively improving the stability of the material on the rear mold; 3. The vertical plate drives the blank to rotate away from the frame, and cooperates with the push plate to clamp the blank, so that the blank is erected on the frame, which is convenient for the subsequent clamp to clamp the blank vertically. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of the high-strength bolt cold heading forming process of the embodiment of the present application.

[0027] Figure 2 It is a structural schematic diagram of the cutting mechanism of an embodiment of the present application.

[0028] Figure 3 It is a structural schematic diagram of the positioning component of an embodiment of the present application.

[0029] Figure 4 It is a schematic diagram of the structure of the transfer mechanism and the stamping mechanism of the embodiment of the present application.

[0030] Figure 5 It is a structural schematic diagram of the transfer mechanism and the stamping mechanism from another perspective of the embodiment of the present application.

[0031] Figure 6 It is a schematic diagram of the structure of the clamp of an embodiment of the present application.

[0032] Figure 7 It is a schematic diagram of the cross-sectional structure of the rear mold of an embodiment of the present application.

[0033] 1. Frame; 2. Cutting mechanism; 21. Feeding assembly; 211. Unwinding roller; 212. Straightening roller; 213. Driving roller; 214. Driving motor; 22. Cutting seat; 23. Cutting assembly; 231. Cutting cylinder; 232. Cutter; 24. Positioning assembly; 241. Push plate; 242. Positioning cylinder; 243. Vertical plate; 244. Standing cylinder; 3. Transfer mechanism; 31. Bracket; 32. Moving seat; 33. Lifting seat; 34. First driving member; 35. Second driving member; 36. Third driving member; 37. Clamp; 371. Clamp; 372. Double-headed cylinder; 4. Rear mold; 5. Stamping mechanism; 51. Stamping seat; 52. Stamping cylinder; 6. Front mold; 7. Positioning mechanism; 71. Wedge; 72. Control assembly; 721. Press block; 722. Return spring. DETAILED DESCRIPTION

[0034] The following is combined with Figure 1-7 This application is described in further detail.

[0035] The embodiment of the present application discloses a cold heading forming process for high-strength bolts.

[0036] Reference Figure 1 , the high-strength bolt cold heading forming process includes the following steps: S1: Cutting the raw material into blanks of preset length by the cutting mechanism 2 on the frame 1; S2: The blank is transferred to the rear mold 4 for the first processing of the blank by the transfer mechanism 3, and the bolts formed on the rear mold 4 processed for the last processing are unloaded from the rear mold 4 by the transfer mechanism 3, and the remaining parts on the rear mold 4 are transferred to the rear mold 4 for the next processing by the transfer mechanism 3; S3: The punching mechanism 5 drives the plurality of front molds 6 to punch and form the materials on the plurality of rear molds 4 at the same time.

[0037] Reference Figure 1 , Figure 2 The cutting mechanism 2 includes a feeding assembly 21, a cutting seat 22, a cutting assembly 23 and a positioning assembly 24. The feeding assembly 21 is installed on the frame 1. The feeding assembly 21 is used to feed the raw materials. The feeding assembly 21 includes a reel 211, a straightening roller 212, a driving roller 213 and a driving motor 214. The reel 211 is rotatably installed on the frame 1. The reel 211 is used to provide a sleeve for the rolled raw materials. There are multiple straightening rollers 212 rotatably installed on the frame 1. The multiple straightening rollers 212 are distributed in two rows in parallel on the frame 1. The driving roller 213 is installed on the frame 1. The driving motor 214 is installed on the frame 1. The output shaft of the driving motor 214 is coaxially connected with the driving roller 213. The cutting seat 22 is installed on the frame 1. The cutting seat 22 is provided with a guide hole for the raw materials to pass through.

[0038] The construction personnel put the rolled raw material tray onto the unwinding roller 211, and then pass the raw material through the multiple straightening rollers 212 distributed in two rows in turn, and after being wound around the driving roller 213, pass it into the guide hole on the cutting seat 22, start the driving motor 214, and the output shaft of the driving motor 214 drives the driving roller 213 to rotate. The driving roller 213 can drive the raw material to move in the direction close to the cutting seat 22 through the friction between the driving roller 213 and the raw material. After the raw material is released from the unwinding roller 211, the multiple straightening rollers 212 arranged in two rows squeeze the raw material, and then straighten the raw material, and through the guidance of the subsequent guide holes on the cutting seat 22, the straightness of the raw material after being released is improved, which is convenient for subsequent processing.

[0039] Reference Figure 2The cutting assembly 23 is installed on the frame 1. The cutting assembly 23 is used to cut the raw materials passing through the cutting seat 22. The cutting assembly 23 includes a cutting cylinder 231 and a cutter 232. The cutting cylinder 231 is vertically installed on the frame 1. The cutter 232 is slidably installed on the side of the cutting seat 22 away from the unwinding roller 211. The cutter 232 is connected to the piston rod of the cutting cylinder 231.

[0040] After the raw material extends from the cutting seat 22 to a preset length, the cutting cylinder 231 is started, the piston rod of the cutting cylinder 231 extends, driving the cutter 232 to slide in the direction of approaching and moving away, and the cutter 232 can cut the raw material according to the preset length to form a blank.

[0041] Reference Figure 2 , Figure 3 The positioning assembly 24 is installed on the frame 1. The positioning assembly 24 is used to position the blank formed by cutting. The positioning assembly 24 includes a push plate 241, a positioning cylinder 242, a stand plate 243 and a stand cylinder 244. Two push plates 241 are slidably installed on the frame 1 at the cutting seat 22. The two push plates 241 are parallel and respectively located on both sides of the guide hole opened on the cutting seat 22. In this embodiment, guide plates are installed on both sides of the guide hole on the cutting seat 22 on the cutting seat 22 to guide the blank formed by cutting, so that the blank formed by cutting can accurately fall to the two push plates 241. The positioning cylinder 242 is installed on the frame 1. In the present embodiment, the positioning cylinder 242 is bidirectionally double-headed. The two piston rods of the positioning cylinder 242 are respectively connected to the two push plates 241, thereby driving the two push plates 241 to move closer to or away from each other. The vertical plate 243 is vertically hingedly installed on the frame 1. The vertical plate 243 is located between the two push plates 241. The vertical plate 243 has the same spacing as the two push plates 241. The length of the vertical plate 243 is less than the length of the blank. The standing cylinder 244 is hingedly installed on the frame 1. The piston rod of the standing cylinder 244 is hingedly connected to the vertical plate 243.

[0042] After the raw material is cut into a blank according to a preset length, the blank falls onto the frame 1, and the positioning cylinder 242 is started, so that the two push plates 241 approach each other, and the two push plates 241 can drive the blank to move to the vertical plate 243 between the two push plates 241, and then the piston rod of the standing cylinder 244 is extended, so that the vertical plate 243 rotates in the direction away from the frame 1. During the rotation process, the two push plates 241 always hold the blank, and the vertical plate 243 can stably drive the blank to rotate in the direction away from the frame 1 and stand up, thereby positioning the blank at the set position on the frame 1, which is convenient for the subsequent precise vertical clamping of the blank and placing it on the rear mold 4.

[0043] Reference Figure 4 , Figure 5The transfer mechanism 3 is installed on the frame 1. The transfer mechanism 3 includes a bracket 31, a moving seat 32, a lifting seat 33, a first driving member 34, a second driving member 35, a third driving member 36 and a clamp 37. A plurality of rear molds 4 are installed on the frame 1 in the same direction and are arranged at intervals. The bracket 31 is slidably installed on the frame 1 in a direction perpendicular to the arrangement direction of the plurality of rear molds 4. The first driving member 34 is installed on the frame 1. The first driving member 34 is used to drive the bracket 31 to slide. In this embodiment, the first driving member 34 includes a servo motor and a screw rod. The servo motor is installed on the frame 1. The screw rod is rotatably installed on the frame 1 along the sliding direction of the bracket 31. The screw rod is coaxially connected with the output shaft of the servo motor. Starting the servo motor and controlling the output shaft of the servo motor to rotate forward or reverse can drive the screw rod to rotate forward or reverse, thereby driving the bracket 31 to move in a direction close to the plurality of rear molds 4 or away from the plurality of rear molds 4.

[0044] Reference Figure 4 , Figure 5 The movable seat 32 is installed on the frame 1 for sliding in the same direction as the arrangement direction of the plurality of rear molds 4. The second driving member 35 is installed on the bracket 31. The second driving member 35 is used to drive the movable seat 32 to slide. In this embodiment, the second driving member 35 is also a servo motor and a screw rod. The servo motor drives the screw rod to rotate, thereby driving the movable seat 32 to slide on the bracket 31.

[0045] Reference Figure 4 , Figure 5 The lifting seat 33 is slidably mounted on the moving seat 32 in the vertical direction, and the third driving member 36 is mounted on the moving seat 32. The third driving member 36 is used to drive the lifting seat 33 to slide. In this embodiment, the third driving member 36 is a cylinder, which is vertically mounted on the moving seat 32. The piston rod of the cylinder is connected to the lifting seat 33. The piston rod of the cylinder is extended and retracted to drive the lifting seat 33 to move up and down; Figure 6 A plurality of clamps 37 are installed on the lifting seat 33 along the arrangement direction of the plurality of rear molds 4 in the same direction and at intervals. The arrangement spacing of the plurality of clamps 37 is the same as the arrangement spacing of the plurality of rear molds 4. The number of clamps 37 is one more than the number of rear molds 4. The clamp 37 is used to clamp the blank or the material formed after processing. The clamp 37 includes a clamp plate 371 and a double-headed cylinder 372. Two clamp plates 371 are slidably installed on the lifting seat 33. The double-headed cylinder 372 is installed on the lifting seat 33. The two piston rods of the double-headed cylinder 372 are respectively connected to the two clamp plates 371. When the two piston rods of the double-headed cylinder 372 are retracted, the two clamp plates 371 can be driven to approach each other for clamping.

[0046] The first driving member 34 drives the frame 1 to drive the bracket 31 to move above the multiple rear molds 4, and the bracket 31 drives the moving seat 32 and the lifting seat 33 to move, so that the multiple clamps 37 move to the top of the rear mold 4, and then the second driving member 35 drives the moving seat 32 to drive the multiple clamps 37 to move horizontally, so that the multiple clamps 37 are respectively aligned with the positioned blank and the materials on the multiple rear molds 4, and then the third driving member 36 drives the lifting seat 33 to descend, and the lifting seat 33 drives the multiple clamps 37 to move to different blanks and materials respectively, and the clamps 37 clamp the blank and the multiple materials. After holding, the third driving member 36 drives the lifting seat 33 to move upward, and the lifting seat 33 drives multiple clamps 37 to lift the blank and the workpieces, and then the second driving member 35 drives the movable seat 32 to move horizontally, and the movable seat 32 drives the lifting seat 33 to drive multiple clamps 37 to move respectively to the top of multiple rear molds 4, and drives the clamp 37 that clamps the bolts formed on the rear mold 4 in the last step of processing to move to the outside of the rear mold 4. The clamp 37 is loosened, so that the blank and multiple workpieces can be loaded onto the rear mold 4 for the next step of processing at the same time, and the bolts formed on the rear mold 4 in the last step of processing can be unloaded.

[0047] Reference Figure 4 , Figure 5 The stamping mechanism 5 includes a stamping seat 51 and a stamping cylinder 52. The stamping seat 51 is slidably installed on the bracket 31 along the vertical direction. A plurality of front molds 6 are installed on the stamping seat 51 in the same direction and arranged at intervals. The plurality of front molds 6 are respectively and one by one located directly above the plurality of rear molds 4. The stamping cylinder 52 is installed on the bracket 31, and the piston rod of the stamping cylinder 52 is connected to the stamping seat 51.

[0048] After the blanks and parts are loaded onto the rear die 4 for the next processing step, the construction personnel control the bracket to drive the stamping seat 51 to move, so that the stamping seat 51 drives the multiple front dies 6 to move to the top of the multiple rear dies 4, and then the piston rod of the stamping cylinder 52 extends, driving the stamping seat 51 to drive the multiple front dies 6 to move toward the multiple rear dies 4 one by one, and the multiple front dies 6 can then impact the rear die 4 and the parts on the rear die 4 accordingly, and the parts are stamped into shape.

[0049] Reference Figure 5 , Figure 7Except for the rear mold 4 for processing the blank for the first time, the rest of the rear molds 4 are equipped with positioning mechanisms 7, which are used to position the material on the rear mold 4. The positioning mechanism 7 includes wedges 71 and a control component 72. A plurality of wedges 71 are slidably installed on the inner wall of the mold, and the sliding directions of the plurality of wedges 71 are all toward the center of the mold. When the plurality of wedges 71 slide close to each other, the inner diameter of the internal space formed is smaller than the diameter of the material formed after the first processing; the control component 72 is installed on the rear mold 4, and the control component 72 is used to drive the plurality of wedges 71 to approach or move away from each other. The control component 72 includes a pressure block 721 and a return spring 722. The pressure block 721 is slidably installed on the rear mold 4, and the pressure block 721 abuts against one end of the plurality of wedges 71 close to the front mold 6. The return spring 722 is installed on the rear mold 4, and the return spring 722 is connected to the wedge 71. The return spring 722 always has a tendency to drive the plurality of wedges 71 away from each other.

[0050] The blank is punched into the rod of the bolt on the rear die 4 processed for the first time, and then the blank is transferred to the remaining rear dies 4 to process the heads of the bolts multiple times. During stamping, the punching seat 51 drives the front die 6 to punch the rear die 4 and the blank, and the front die 6 drives the blank to abut against the pressure block 721, driving the pressure block 721 to squeeze the wedge 71 in the direction close to the wedge 71, thereby driving the multiple wedges 71 to approach each other. The multiple wedges 71 can clamp the blank, improve the stability of the blank on the bottom die, reduce the possibility of the blank shrinking into the rear die 4, ensure the volume of the stamped part of the blank between the rear die 4 and the front die 6, and improve the processing accuracy. After the subsequent stamping is completed and the front die 6 is withdrawn, the reset spring 722 drives the multiple wedges 71 away from each other, and the multiple wedges 71 can release the clamping of the blank, which is convenient for the subsequent removal of the processed blank from the rear die 4.

[0051] The implementation principle of a high-strength bolt cold heading forming process of the embodiment of the present application is as follows: after the cutting mechanism 2 cuts the raw material to form a blank, the first driving member 34 drives the bracket 31 to move, and the second driving member 35 drives the moving seat 32 to move, so that the multiple clamps 37 are respectively moved to the top of the blank and each rear mold 4, and then the third driving member 36 drives the lifting seat 33 to drive the multiple clamps 37 to move downward, and after the blank and the material on each rear mold 4 are clamped by the multiple clamps 37, the lifting seat 33 is driven to rise, and the moving seat 32 is driven to move, so that the blank and the multiple materials are respectively moved to the top of the rear mold 4 for the next processing, and the last The bolts formed by the second rear die 4 are moved to the outside of the rear die 4, and then the third driving member 36 drives the lifting seat 33 to move downward, so that the blank and multiple parts can be loaded onto the rear die 4 processed for the next time at the same time, and the bolts formed after the last processing can be unloaded at the same time, so that the loading of the blank, the transfer of the parts to the rear die 4 processed for the next time, and the unloading of the bolts formed by the last processing of the rear die 4 can be carried out simultaneously, and the time spent on transferring and loading the parts can be synchronized, thereby reducing the time spent on unloading, loading, and transferring the parts at intervals on the same rear die 4, so that multiple cold heading forming processes of the bolts can be carried out continuously, effectively improving the processing efficiency of cold heading forming of the bolts.

[0052] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A high-strength bolt cold heading forming process, characterized in that: The following steps are involved: S1: Cutting the raw material into blanks of a preset length by means of a cutting mechanism (2) on a frame (1); S2: The blank is transferred to the rear mold (4) for the first processing of the blank by the transfer mechanism (3), and the bolts formed by the processing on the rear mold (4) for the last processing are removed from the rear mold (4) by the transfer mechanism (3), and at the same time, the remaining parts on the rear mold (4) are transferred to the rear mold (4) for the next processing by the transfer mechanism (3); S3: using a punching mechanism (5) to simultaneously drive the plurality of front dies (6) to punch and form the materials on the plurality of rear dies (4) respectively.

2. The cold heading forming process of a high-strength bolt according to claim 1, characterized in that: The transfer mechanism (3) comprises a support (31), a movable seat (32), a lifting seat (33), a first driving member (34), a second driving member (35), a third driving member (36) and a clamp (37); a plurality of rear molds (4) are arranged on the frame (1) at intervals in the same direction; the support (31) is slidably arranged on the frame (1) along a direction toward the arrangement direction of the plurality of rear molds (4); the movable seat (32) is slidably arranged on the support (31) along the arrangement direction of the plurality of rear molds (4); and the lifting seat (33) is slidably arranged on the movable seat (32) along a vertical direction. The first driving member (34) is arranged on the frame (1) and is used to drive the bracket (31) to slide, the second driving member (35) is arranged on the bracket (31) and is used to drive the movable seat (32) to slide, the third driving member (36) is arranged on the movable seat (32) and is used to drive the lifting seat (33) to slide, a plurality of the clamps (37) are arranged on the lifting seat (33) in the same direction and at intervals, the clamps (37) are used to clamp the blank or the workpiece, and the arrangement spacing of the plurality of the clamps (37) is the same as the arrangement spacing of the plurality of the rear molds (4).

3. The high-strength bolt cold heading forming process according to claim 2, characterized in that: The clamp (37) comprises a clamping plate (371) and a double-headed cylinder (372), wherein two clamping plates (371) are slidably arranged on the lifting seat (33), and the double-headed cylinder (372) is arranged on the lifting seat (33) and is used to drive the two clamping plates (371) to move closer to or farther from each other.

4. The high-strength bolt cold heading forming process according to claim 1, characterized in that: The punching mechanism (5) comprises a punching seat (51) and a punching cylinder (52); the punching seat (51) is slidably arranged on a bracket (31); a plurality of front dies (6) are arranged at intervals on the punching seat (51); the plurality of front dies (6) are respectively adapted to the plurality of rear dies (4); and the punching cylinder (52) is arranged on the bracket (31) and is used to drive the punching seat (51) to slide toward the rear die (4).

5. The cold heading forming process of high-strength bolts according to claim 1, characterized in that: The rear mold (4) is provided with a positioning mechanism (7) for positioning the workpiece, the positioning mechanism (7) comprising a wedge (71) and a control component (72), a plurality of wedges (71) are slidably provided on the inner wall of the mold, the plurality of wedges (71) slide in a direction approaching each other to clamp the workpiece, and the control component (72) is provided on the rear mold (4) and is used to drive the plurality of wedges (71) to move closer to or away from each other.

6. The high-strength bolt cold heading forming process according to claim 5, characterized in that: The control assembly (72) comprises a pressing block (721) and a return spring (722); the pressing block (721) is slidably arranged on the rear mold (4) and is used to press the multiple wedges (71) toward each other; and the return spring (722) is arranged on the rear mold (4) and is used to drive the multiple wedges (71) away from each other.

7. The high-strength bolt cold heading forming process according to claim 1, characterized in that: The cutting mechanism (2) comprises a feeding assembly (21), a cutting seat (22), a cutting assembly (23) and a positioning assembly (24); the feeding assembly (21) is arranged on the frame (1) and is used to feed the raw material; the cutting seat (22) is arranged on the frame (1) and is used to allow the raw material to pass through; the cutting assembly (23) is arranged on the frame (1) and is used to cut the raw material that passes through the cutting seat (22); and the positioning assembly (24) is arranged on the frame (1) and is used to position the blank formed by cutting.

8. The high-strength bolt cold heading forming process according to claim 7, characterized in that: The feeding assembly (21) comprises an unwinding roller (211), a straightening roller (212), a driving roller (213) and a driving motor (214); the unwinding roller (211) is rotatably arranged on a frame (1) and is used to place a material tray; a plurality of straightening rollers (212) are arranged on the frame (1) in two rows at intervals; the driving roller (213) is arranged on the frame (1); the driving motor (214) is arranged on the frame (1) and is used to drive the driving roller (213) to rotate; and the raw material on the material tray passes between the two rows of straightening rollers (212) and is wound around the driving roller (213).

9. The high-strength bolt cold heading forming process according to claim 7, characterized in that: The cutting assembly (23) comprises a cutting cylinder (231) and a cutting knife (232); the cutting cylinder (231) is arranged on the frame (1); the cutting knife (232) is slidably arranged on the cutting seat (22) and is connected to the piston rod of the cutting cylinder (231).

10. The high-strength bolt cold heading forming process according to claim 7, characterized in that: The positioning assembly (24) comprises a push plate (241), a positioning cylinder (242), a vertical plate (243) and a standing cylinder (244); two push plates (241) are slidably arranged on the frame (1); the positioning cylinder (242) is arranged on the frame (1) and is used to drive the two push plates (241) to approach each other; the vertical plate (243) is hingedly arranged on the frame (1); the vertical plate (243) is located between the two push plates (241) and has the same spacing as the two push plates (241); the standing cylinder (244) is hingedly arranged on the frame (1); and the piston rod of the standing cylinder (244) is hingedly connected to the vertical plate (243).

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