A universal bolt and a production device and a production process thereof

Abstract

The application discloses a universal joint bolt and a production device and a production process thereof, relates to the technical field of universal joint bolts, and aims to solve the technical problems that the universal joint bolt has great limitations in use and that existing stamping equipment is difficult to stamp the universal joint bolt with a complex structure of a universal joint head, and the universal joint bolt comprises a universal joint head, the universal joint head is spherical and is provided with a bushing on a side wall, the side wall of the universal joint head is further provided with a fixing hole and a stop hole, an arc groove and a shaft groove are formed in the top of the universal joint head, a plurality of arc plates are movably arranged in the arc groove, the plurality of arc plates are oppositely and staggeredly arranged, an upper hole is formed in one end of each arc plate and is communicated with the fixing hole, and a lower hole is formed in the other end of each arc plate and is communicated with the stop hole. The universal joint bolt has the advantages of being suitable for various scenes, having strong adaptability and good flexibility.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of articulated bolts, in particular to an articulated bolt and a production equipment and production process thereof. BACKGROUND

[0002] An articulated bolt is a special fastener, commonly known as an eye bolt or fish eye bolt; the head of the articulated bolt is in the form of a spherical surface with a hole, the spherical surface is smooth, the screw rod is threaded, and the material is mostly carbon steel; the structure of the round head with a hole can be used in scenes that require swinging, adjustment or hinging, and is commonly used in the field of industrial assembly.

[0003] The articulated head allows relative rotation or swinging between the two connected parts, for example, in some mechanical structures, when two parts need to change the relative angle during movement, the articulated head of the articulated bolt can flexibly adjust the position of the two parts without being limited by rigid connection; in actual use, although the articulated bolt can conveniently connect two parts, it is difficult to achieve fixed connection between the two parts, and the articulated head is usually connected by inserting a pin shaft, a bolt, etc.; when some fixed shafts with non-open ends need to be inserted into the insertion hole of the articulated head for connection, it is more difficult to achieve, thereby causing the articulated bolt to have large limitations in use and poor adaptability.

[0004] The conventional articulated bolt is formed by hot pressing process, and in the present application, referring to the articulated bolt shown in the accompanying drawings of the specification Figure 1 and Figure 2 The articulated head structure of the articulated bolt is complex, and the cavity direction is more, so the conventional single die is difficult to be formed by stamping.

[0005] In view of this, we propose an articulated bolt and a production equipment and production process thereof. SUMMARY

[0006] The present application aims to provide an articulated bolt and a production equipment and production process thereof, to solve the technical problems that the articulated bolt has large limitations in use, and the existing stamping equipment is difficult to stamp the articulated bolt with a complex articulated head structure.

[0007] To solve the above technical problems, the present application provides the following technical scheme: an articulated bolt, comprising an articulated head, the articulated head is spherical and a side wall is provided with an insertion hole; the side wall of the articulated head is also provided with a fixing hole and a stop hole, and the top of the articulated head is provided with a circular arc groove and a shaft groove; a plurality of circular arc plates are movably arranged in the circular arc groove; one end of the circular arc plate is provided with an upper hole communicating with the fixing hole, and the other end is provided with a lower hole communicating with the stop hole.

[0008] The utility model provides a production device for manufacturing the articulated bolt, including the base, the top of base is arranged with vertical punch assembly, horizontal punch assembly and forming assembly, the vertical punch assembly includes lower punch, the bottom of lower punch is provided with pressure cavity, the inboard wall of pressure cavity is integrally formed with arc convex block and pressure groove block, the side wall of pressure groove block is provided with big through -hole and a plurality of small through -hole, the horizontal punch assembly includes side punch, the side wall of side punch is connected with big punch column and a plurality of small punch column, the forming assembly includes mould, the top of mould is provided with spherical groove, the bottom of spherical groove is provided with rod groove, the top of mould is also provided with punch groove, the inboard wall of punch groove is integrally formed with a plurality of shaping ring mode, the side wall of shaping ring mode is provided with big punch hole and a plurality of small punch hole, the vertical punch assembly further includes fixing frame, the bottom of fixing frame is connected with a plurality of guide plate, the bottom of guide plate is circular arc shape wheel track structure.

[0009] Preferably, the forming assembly further includes an electric machine arranged on the top of the base, a plurality of fixed plates and a blocking piece, the output end of the electric machine is connected with a plurality of gear wheels I, the output end of the gear wheels I is engagedly connected with gear wheels II, the plurality of gear wheels I are coaxially connected and rotationally arranged on the side wall of the fixed plates, the gear wheels II are rotationally arranged on the side wall of the fixed plates, the plurality of fixed plates are connected through bearing columns, and the circumferential outer wall of the bearing columns is rotationally connected with a plurality of transmission cylinders through bearings.

[0010] Preferably, the circumferential outer wall of the transmission cylinders is arranged with toothed openings, the transmission cylinders are engagedly connected with the gear wheels II through the toothed openings, the circumferential outer wall of the transmission cylinders is further connected with a plurality of support plates, and the top of the support plates is connected with a plurality of transmission rods; the bottom of the mould is provided with a plurality of sliding grooves, the side wall of the mould is connected with a plurality of fixed ears, the fixed ears are provided with sliding holes from top to bottom, and the transmission rods are movably penetrated through the sliding holes; the circumferential outer wall of the bearing columns is connected with a plurality of guide rails, and the mould is slidably matched with the guide rails through the sliding grooves.

[0011] Preferably, the circumferential outer wall of the bearing columns is further connected with arc convex strips; a plurality of movable rods are movably inserted into the bottom of the mould, the movable rods are penetrated through the top of the mould, the circumferential outer wall of the movable rods is sleeved with springs I, the bottom of the movable rods is connected with half-arc plates, and the springs I are arranged between the half-arc plates and the mould.

[0012] Preferably, the top of the fixed ear is connected with a limiting ring, the top of the transmission rod is connected with an adjusting column, the circumferential outer wall of the adjusting column is sleeved with springs II, and the top of the adjusting column is connected with a limiting plate.

[0013] Preferably, an adjusting block is arranged above the fixing lug, the bottom of the adjusting block is integrally formed with a plurality of adjusting cylinders, the inner cavity of the adjusting cylinder is arranged with a stop block at the bottom, and a roller is movably arranged at the top of the adjusting block; the adjusting column and the limiting plate are movably arranged in the inner cavity of the adjusting cylinder, and the second spring is arranged between the adjusting cylinder and the fixing lug.

[0014] A production process of a universal bolt using the above production equipment, comprising the following steps:

[0015] S1, discharging operation, the bolt blank heated to a thermoplastic state is placed in the spherical groove through the external clamp, the screw rod of the bolt blank enters the rod groove, and the head of the bolt blank is positioned in the cavity surrounded by the plurality of shaping ring dies and the spherical groove;

[0016] S2, multi-directional punching forming operation, downward punching is performed through the lower punch, the pressing groove block of the lower punch is punched into the spherical groove, the shape of the circular arc groove is punched out on the head of the bolt blank, the arc convex block punches out the shape of the shaft groove on the head of the bolt blank, after completion, the lower punch is kept in the state of punching forming, the head of the bolt blank is positioned again, and then punching is performed through the side punch, the large punching column penetrates the large punching hole in the side wall of the plurality of shaping ring dies and the large penetration hole in the side wall of the pressing groove block, the small punching column penetrates the small punching hole in the side wall of the plurality of shaping ring dies and the small penetration hole in the side wall of the pressing groove block, the insertion hole, the fixing hole and the stop hole are punched out on the head of the bolt blank, and the punching forming operation of the universal head is completed;

[0017] S3, rotating discharging operation, after the punching forming of the universal head is completed, the transmission cylinder is rotated around the circumferential outer wall of the bearing column, and the plurality of dies are synchronously rotated; when the die rotates, the semicircular plate at the bottom of the die contacts the arc-shaped convex side wall of the circumferential outer wall of the bearing column, as the arc-shaped convex strip gradually thickens from top to bottom, the extrusion force on the semicircular plate increases, the semicircular plate moves towards the die, and the movement of the semicircular plate can push the bottom of the screw rod of the bolt blank, so that the universal head of the bolt blank is separated from the shape of the spherical groove, until the die rotates to the lower part of the bearing column, the bolt blank is affected by its own gravity and the pushing force of the semicircular plate, and falls off from the spherical groove;

[0018] S4, automatic conversion of supporting force operation, in the rotating process, the die is driven by the transmission cylinder, the transmission cylinder supports the die, until the roller of the adjusting block contacts and slides on the circular arc rail structure at the bottom of the guide plate, the roller is extruded downward by the circular arc structure of the guide plate, the adjusting block is driven to move downward, the second spring is compressed, and the sliding groove at the bottom of the die is tightly attached to the guide rail, at this time, the bearing column supports the die, so that the downward pressure generated in the punching forming process can act on the bearing column through the die, and the rotating part is not affected.

[0019] Compared with the prior art, the beneficial effects of the present application are:

[0020] 1. The application comprises a circular arc groove in the joint head of the joint bolt, a plurality of circular arc plates arranged in opposite staggered arrangement are movably arranged in the circular arc groove, when the two ends of the circular arc plates are fixed in the circular arc groove through half-threaded bolts and nuts, the circular hole structure formed by the plurality of circular arc plates is in communication with the insertion hole structure of the joint head, the connection function of two components can be realized by inserting the pin shaft or bolt into the insertion hole, and the movable connection of the pin shaft or bolt in the insertion hole of the joint head side wall makes the two components can rotate, when the rotating function needs to be locked to realize fixed connection, the half-threaded bolt of the lower hole and the stop hole is disassembled, the plurality of circular arc plates rotate around the fixed hole as the rotation axis to form the circular hole structure protruding from the top of the joint head and aligned with the shaft groove, another pin shaft or bolt is inserted into the circular hole structure to form multi-point connection, so that the components cannot rotate through the insertion hole or the circular hole structure of the joint head side wall to realize fixed connection, when the movable connection with a fixed shaft with non-open ends at both ends is needed, the rotating clamps of the plurality of circular arc plates are used on the fixed shaft, and then the lower holes of the plurality of circular arc plates are fixed through bolts and nuts to realize connection, which is suitable for various scenes, has strong adaptability and good flexibility.

[0021] 2. The application comprises a plurality of positioning ring molds and a cavity formed by a spherical groove to position the head of the bolt blank, then a lower punch is used to punch out the shapes of the circular arc groove and the shaft groove on the head of the bolt blank, and the lower punch is kept in the state of stamping forming to form secondary positioning on the head of the bolt blank with the circular arc groove and the shaft groove, so as to prevent deformation of the inside during side punching, then a side punch is used to punch out the shapes of the insertion hole, the fixed hole and the stop hole on the head of the bolt blank, realizing integrated precision forming of the multi-dimensional complex structure of the joint head, and the continuous pressing of the lower punch forms a rigid support framework to ensure that the formed circular arc groove and shaft groove will not be displaced or deformed due to lateral force during lateral punching, so as to guarantee the precision and effect of stamping forming, and solve the problem that the complex structure of the joint head and the multiple directional holes are difficult to be stamped by a conventional single die.

[0022] 3、The present application rotates around the circumferential outer wall of the supporting column through the transmission cylinder after the stamping forming of the joint head is completed, the transmission rod on the transmission cylinder penetrates the sliding hole of the fixed ear of the die, and then drives the plurality of dies to rotate synchronously, when the die rotates, the semicircular plate at the bottom thereof is in contact with the arc-shaped protruding strip side wall of the circumferential outer wall of the supporting column, with the arc-shaped protruding strip gradually thickening from top to bottom, the extrusion force on the semicircular plate increases, and the semicircular plate moves towards the die, the movement of the semicircular plate can push the bottom of the screw rod of the bolt blank, so that the joint head of the bolt blank is separated from the shape of the spherical groove, until the die rotates to the position below the supporting column, the bolt blank is affected by its own gravity and the thrust of the semicircular plate, and falls off from the spherical groove, so that the effects of automatic discharging and rapid discharging are realized, and the problem that the joint head is difficult to take out after being formed in the spherical groove is solved.

[0023] 4、When the die gradually rotates to the position above the supporting column, the roller of the adjusting block is in contact with the circular arc rail structure at the bottom of the guide plate and slides, the roller is extruded downward by the circular arc structure of the guide plate, so that the adjusting block moves downward, when the adjusting block moves downward, spring two is compressed, due to the vertical guiding effect of the plurality of transmission rods on the die, the elastic force generated by spring two acts vertically on the top of the fixed ear, the gap between the bottom of the fixed ear and the top of the supporting plate gradually decreases, until the sliding groove at the bottom of the die is tightly fitted with the guide rail, at this time, the supporting column supports the die, and then the head of the bolt blank on the die is subjected to the stamping operation of the lower punch, in the stamping process, the impact force of the lower punch can be transmitted to the supporting column through the die, and the stability of the stamping forming process is ensured by using the stability of the supporting column, due to the gap between the bottom of the fixed ear and the top of the supporting plate, the impact force cannot act on the transmission cylinder, so that the rotating structure of the transmission cylinder is protected, and the problem that the impact force generated in the stamping process easily causes damage to the transmission cylinder is solved.

[0024] 5、The die is rotated for discharging by the rotation of the transmission cylinder, in the rotating process, the roller of the adjusting block is in a separated state with the circular arc rail structure at the bottom of the guide plate, at this time, the adjusting block loses the extrusion force of the circular arc rail structure at the bottom of the guide plate, the compression state of spring two is invalid, the adjusting block gradually moves upward, the fixed ear of the die loses the elastic force of spring two, so that the sliding groove at the bottom of the die is no longer tightly fitted with the guide rail, the friction between the sliding groove and the guide rail is reduced, and the die is beneficial to rotate more smoothly. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 It is a whole structure schematic diagram of the joint bolt of the present application.

[0026] Figure 2 It is a split structure schematic diagram of the joint head of the present application.

[0027] Figure 3Fig. 1 is a schematic diagram of the connection state structure of the articulated head of the present application and a fixed shaft with non-open ends.

[0028] Figure 4 Fig. 2 is a schematic diagram of the overall structure of a production equipment for manufacturing articulated bolts of the present application.

[0029] Figure 5 Fig. 3 is a schematic diagram of the sectional structure of the production equipment of the present application.

[0030] Figure 6 Fig. 4 is a schematic diagram of the vertical punching assembly structure of the present application.

[0031] Figure 7 Fig. 5 is a schematic diagram of the lower punch structure of the present application.

[0032] Figure 8 Fig. 6 is a schematic diagram of the horizontal punching assembly structure of the present application.

[0033] Figure 9 Fig. 7 is a schematic diagram of the side punch structure of the present application.

[0034] Figure 10 Fig. 8 is a schematic diagram of the forming assembly structure of the present application.

[0035] Figure 11 Fig. 9 is a schematic diagram of the split structure of the load-bearing column and the transmission cylinder of the present application.

[0036] Figure 12 Fig. 10 is a schematic diagram of the split structure of the transmission cylinder, the die, and the adjusting block of the present application.

[0037] Figure 13 Fig. 11 is a schematic diagram of the top structure of the die of the present application.

[0038] Figure 14 Fig. 12 is a schematic diagram of the bottom structure of the die of the present application.

[0039] Figure 15 Fig. 13 is a schematic diagram of the adjusting block structure of the present application.

[0040] Figure 16 Fig. 14 is a schematic diagram of the sectional structure of the forming assembly of the present application.

[0041] Figure 17 Fig. 15 is another schematic diagram of the sectional structure of the forming assembly of the present application.

[0042] Figure 18 Fig. 16 is a schematic diagram of the structure at A in Fig. 1. Figure 17

[0043] Fig. 17 is a legend of the reference numerals in the drawings.

[0044] 1, articulated head; 2, base; 3, vertical punching assembly; 4, horizontal punching assembly; 5, forming assembly; ​

[0045] 101, fixing hole; 102, stop hole; 103, arc groove; 104, shaft groove; 105, arc plate; 106, upper hole; 107, lower hole; 201, blanking chute; 301, lower punch; 302, pressing cavity; 303, arc bump; 304, pressing groove block; 305, large through hole; 306, small through hole; 307, fixing bracket; 308, hydraulic cylinder 1; 309, guide plate; 401, side punch; 402, large punch column; 403, small punch column; 404, hydraulic cylinder 2; 405, guide cylinder;

[0046] 51. Mould; 52. Motor; 53. Fixing plate; 54. Covering block; 55. Gear 1; 56. Gear 2; 57. Bearing column; 58. Transmission cylinder; 59. Adjusting block; 5101. Spherical groove; 5102. Rod groove; 5103. Punching groove; 5104. Sizing ring mould; 5105. Large punching hole; 5106. Small punching hole; 5107. Slide groove; 5108. Fixing ear; 5109. Sliding hole; 5110, movable rod; 5111, spring 1; 5112, semi-arc plate; 5113, limiting ring; 5701, guide rail; 5702, arc-shaped ridge; 5801, tooth mouth; 5802, support plate; 5803, transmission rod; 5804, adjusting column; 5805, spring 2; 5806, limiting plate; 5901, adjusting cylinder; 5902, block; 5903, roller. DETAILED DESCRIPTION

[0047] Example 1, as Figures 1 to 3 As shown, this embodiment provides a swing bolt, including a swing head 1, which is spherical and has a socket on its side wall, and the socket is used to insert a pin shaft and a bolt to form a connection; the side wall of the swing head 1 is also provided with a fixing hole 101 and a stop hole 102, and the top of the swing head 1 is provided with an arc groove 103 and an axis groove 104, and the center position of the arc groove 103 and the fixing hole 101 are consistent; a plurality of arc plates 105 are movably arranged in the arc groove 103, and the plurality of arc plates 105 are arranged in an opposite and staggered manner, and the circular hole structure enclosed by the plurality of arc plates 105 is connected to the socket structure of the swing head 1; the arc One end of the plate 105 is provided with an upper hole 106 connected to the fixing hole 101, and the other end is provided with a lower hole 107 connected to the stop hole 102. The upper hole 106 is connected to the fixing hole 101 by a semi-threaded bolt and a nut, and the lower hole 107 is connected to the stop hole 102 by a semi-threaded bolt and a nut; when the semi-threaded bolts of the lower hole 107 and the stop hole 102 are removed, the multiple arc plates 105 can rotate with the center of the fixing hole 101 as the rotation axis, forming a circular hole structure that protrudes from the top of the joint head 1 and is aligned with the shaft groove 104, which is used to connect with the fixed shaft with non-open ends.

[0048] The application discloses a hinge bolt, which comprises a hinge head 1, a hinge shaft 2 and a hinge base 3.

[0049] In the embodiment, the hinge bolt is manufactured by using the production equipment. Figures 4 to 18 The production equipment comprises a base 2, a vertical punching assembly 3, a horizontal punching assembly 4 and a forming assembly 5.

[0050] The vertical punching assembly 3 comprises a lower punch 301, the lower punch 301 is provided with a pressing cavity 302 at the bottom, the pressing cavity 302 is integrally formed with an arc convex block 303 and a pressing groove block 304 on the inner side wall, the pressing groove block 304 is provided with a large through hole 305 and a plurality of small through holes 306 on the side wall. The horizontal punching assembly 4 comprises a side punch 401, the side punch 401 is connected with a large punch column 402 and a plurality of small punch columns 403 on the side wall. The forming assembly 5 comprises a mold 51, the mold 51 is provided with a spherical groove 5101 at the top, the spherical groove 5101 is provided with a rod groove 5102 at the bottom, the mold 51 is further provided with a punching groove 5103 at the top, a plurality of shaping ring molds 5104 are integrally formed on the inner side wall of the punching groove 5103, the cavity shape formed by the plurality of shaping ring molds 5104 and the spherical groove 5101 is the same as the appearance shape of the hinge head 1, the side wall of the shaping ring mold 5104 is provided with a large punch hole 5105 and a plurality of small punch holes 5106, and the punching groove 5103 is in communication with the spherical groove 5101 through the punch holes of the shaping ring mold 5104.

[0051] It is worth mentioning that when the bolt blank heated to the thermoplastic state is placed in the spherical groove 5101, the shank of the bolt blank enters the rod groove 5102, and the head of the bolt blank is positioned in the cavity surrounded by the plurality of shaping ring dies 5104 and the spherical groove 5101. First, the head of the bolt blank is punched by the lower punch 301, the pressure groove block 304 of the lower punch 301 is punched into the spherical groove 5101, and the head of the bolt blank is punched into the shape of the circular arc groove 103. Similarly, the arc convex block 303 punches the head of the bolt blank into the shape of the shaft groove 104, and the pressure cavity 302 cooperates with the spherical groove 5101 and the plurality of shaping ring dies 5104 to punch the head of the bolt blank into the appearance shape of the joint head 1. After completion, the lower punch 301 is kept in the state of being punched and formed, and the head of the bolt blank is positioned again. Then, the head of the bolt blank is laterally punched by the side punch 401. The large punch column 402 of the side punch 401 penetrates the large punch hole 5105 in the side wall of the plurality of shaping ring dies 5104 and the large through hole 305 in the side wall of the pressure groove block 304, and the small punch column 403 penetrates the small punch hole 5106 in the side wall of the plurality of shaping ring dies 5104 and the small through hole 306 in the side wall of the pressure groove block 304. The head of the bolt blank is punched into the insertion hole, the fixing hole 101 and the stop hole 102, and the punching and forming operation of the joint head 1 is completed.

[0052] The present application positions the head of the bolt blank in the cavity surrounded by the plurality of shaping ring dies 5104 and the spherical groove 5101, then punches the head of the bolt blank into the shape of the circular arc groove 103 and the shaft groove 104 by using the lower punch 301, keeps the lower punch 301 in the state of being punched and formed, positions the head of the bolt blank punched into the circular arc groove 103 and the shaft groove 104 again, prevents deformation of the inside when side punching is performed, then punches the head of the bolt blank into the shape of the insertion hole, the fixing hole 101 and the stop hole 102 by using the side punch 401, realizes integrated precision forming of the multi-dimensional complex structure of the joint head 1, forms a rigid support framework by using the continuous pressure of the lower punch 301, ensures that the formed circular arc groove 103 and shaft groove 104 will not be displaced or deformed due to lateral force during lateral punching, guarantees the precision and effect of punching and forming, and solves the problem that the joint head 1 has a complex structure and many multi-directional cavities, which are difficult to be punched and formed by using a conventional single die.

[0053] In the embodiment of the present application, the vertical punching assembly 3 further comprises a fixing frame 307, a hydraulic cylinder I 308 is installed on the fixing frame 307, the output end of the hydraulic cylinder I 308 is connected with the lower punch 301, a plurality of guide plates 309 are connected at the bottom of the fixing frame 307, and the bottom of the guide plate 309 is in a circular arc track structure; the horizontal punching assembly 4 comprises a hydraulic cylinder II 404 and a guide cylinder 405 arranged at the top of the base 2, the output end of the hydraulic cylinder II 404 is connected with the side punch 401, the side punch 401 is in a cylindrical structure, and the side punch 401 is movably arranged in the inner cavity of the guide cylinder 405; and a blanking groove 201 is formed at the top of the base 2 and is arranged below the mold 51.

[0054] In the embodiment of the present application, the forming assembly 5 further comprises a motor 52, a plurality of fixed plates 53 and a shielding block 54 arranged at the top of the base 2, a plurality of gear wheels I 55 are connected with the output end of the motor 52, gear wheels II 56 are meshingly connected with the output end of the gear wheels I 55, the plurality of gear wheels I 55 are coaxially connected and rotatably arranged on the side wall of the fixed plate 53, the gear wheels II 56 are rotatably arranged on the side wall of the fixed plate 53, the plurality of fixed plates 53 are connected through a bearing column 57, the bearing column 57 is fixedly connected with the fixed plate 53 through bolts, a plurality of transmission cylinders 58 are rotatably connected with the circumferential outer wall of the bearing column 57 through bearings, the circumferential outer wall of the transmission cylinder 58 is provided with a toothed portion 5801, and the transmission cylinder 58 is meshingly connected with the gear wheels II 56 through the toothed portion 5801; the mold 51 is two, and the two molds 51 are arranged in a symmetrical structure on the circumferential outer wall of the bearing column 57. After the motor 52 is started, the coaxial plurality of gear wheels I 55 are driven to rotate, the gear wheels I 55 transmit power to the gear wheels II 56 through meshing, and the gear wheels II 56 cooperate with the toothed portion 5801 on the outer wall of the transmission cylinder 58 to drive the transmission cylinder 58 to rotate around the bearing column 57.

[0055] As another embodiment of the present application, the circumferential outer wall of the transmission cylinder 58 is further connected with a plurality of support plates 5802, the top of the support plate 5802 is connected with a plurality of transmission rods 5803; a plurality of sliding grooves 5107 are formed at the bottom of the mold 51, a plurality of fixed ears 5108 are connected with the side wall of the mold 51, the fixed ear 5108 is provided with a sliding hole 5109 from top to bottom, and the transmission rod 5803 movably penetrates the sliding hole 5109. When the transmission cylinder 58 rotates, the mold 51 can be driven to rotate synchronously through the transmission rod 5803; a plurality of guide rails 5701 are connected with the circumferential outer wall of the bearing column 57, and the mold 51 is slidably matched with the guide rail 5701 through the sliding groove 5107. Since the two molds 51 arranged in a symmetrical structure on the circumferential outer wall of the bearing column 57 are connected with the transmission cylinder 58 through the transmission rod 5803, the rotation of the transmission cylinder 58 can drive the mold 51 to rotate synchronously, so that the mold 51 can slide on the guide rail 5701 through the sliding groove 5107, and the rotation of the mold 51 around the bearing column 57 is realized.

[0056] In the embodiment of the present application, the load-bearing column 57 is further connected with an arc-shaped convex strip 5702, which is arranged between two guide rails 5701 and has a circular arc shape and a structure that gradually thickens from top to bottom; the bottom of the mold 51 is movably inserted with a plurality of movable rods 5110, which penetrate the top of the mold 51, and the outer circumferential wall of the movable rod 5110 is sleeved with a spring 5111, and the bottom of the movable rod 5110 is connected with a semicircular plate 5112, and the spring 5111 is arranged between the semicircular plate 5112 and the mold 51, and the bottom of the semicircular plate 5112 is in contact with the outer circumferential wall of the load-bearing column 57, when the mold 51 rotates around the outer circumferential wall of the load-bearing column 57 through the guide rails 5701, the semicircular plate 5112 can be in contact with the side wall of the arc-shaped convex strip 5702 and be pressed by the arc-shaped convex strip 5702.

[0057] After the stamping forming of the knuckle head 1 is completed, the transmission cylinder 58 rotates around the outer circumferential wall of the load-bearing column 57, the transmission rod 5803 on the transmission cylinder 58 penetrates the sliding hole 5109 of the fixed lug 5108 of the mold 51, thereby driving the plurality of molds 51 to rotate synchronously, when the mold 51 rotates, the semicircular plate 5112 at the bottom thereof is in contact with the side wall of the arc-shaped convex strip 5702 of the outer circumferential wall of the load-bearing column 57, as the arc-shaped convex strip 5702 gradually thickens from top to bottom, the pressing force received by the semicircular plate 5112 increases, the semicircular plate 5112 moves towards the mold 51, and the moving process of the semicircular plate 5112 can push the bottom of the screw rod of the bolt blank, so that the knuckle head 1 of the bolt blank is separated from the shape of the spherical groove 5101, until the mold 51 rotates to the lower side of the load-bearing column 57, the bolt blank is affected by its own gravity and the thrust of the semicircular plate 5112, and falls out of the spherical groove 5101, thereby realizing the effects of automatic discharging and rapid discharging, and solving the problem that the knuckle head 1 is difficult to take out after being formed in the spherical groove 5101.

[0058] In the embodiment of the application, the bottom of the fixing lug 5108 is in clearance fit with the top of the support plate 5802, the top of the fixing lug 5108 is connected with a limiting ring 5113, the top of the transmission rod 5803 is connected with an adjusting column 5804, the circumferential outer wall of the adjusting column 5804 is sleeved with a spring 5805, and the top of the adjusting column 5804 is connected with a limiting plate 5806; an adjusting block 59 is arranged above the fixing lug 5108, a plurality of adjusting cylinders 5901 are integrally formed at the bottom of the adjusting block 5903, a stop block 5902 is arranged at the bottom of the inner cavity of the adjusting cylinder 5901, and a roller 5903 is movably arranged at the top of the adjusting block 5903; the adjusting column 5804 and the limiting plate 5806 are movably arranged in the inner cavity of the adjusting cylinder 5901, the spring 5805 is arranged between the adjusting cylinder 5901 and the fixing lug 5108, and the adjusting block 5903 can move along the direction of the adjusting column 5804; when the adjusting block 5903 moves to the maximum distance away from the adjusting column 5804, the stop block 5902 is attached to the limiting plate 5806, so that the adjusting block 5903 is prevented from being separated from the adjusting column 5804; when the mold 51 rotates to the position above the bearing column 57, the roller 5903 of the adjusting block 5903 slides in contact with the arc-shaped rail structure at the bottom of the guide plate 309, and the roller 5903 is subjected to the downward extrusion force of the arc-shaped structure of the guide plate 309, so that the adjusting block 5903 moves downward.

[0059] The adjusting block 5903 is designed, when the mold 51 gradually rotates to the position above the bearing column 57, the roller 5903 of the adjusting block 5903 slides in contact with the arc-shaped rail structure at the bottom of the guide plate 309, the roller 5903 is subjected to the downward extrusion force of the arc-shaped structure of the guide plate 309, so that the adjusting block 5903 moves downward, when the adjusting block 5903 moves downward, the spring 5805 is compressed, due to the vertical guiding action of the plurality of transmission rods 5803 on the mold 51, the elastic force generated by the spring 5805 acts vertically on the top of the fixing lug 5108, the gap between the bottom of the fixing lug 5108 and the top of the support plate 5802 gradually decreases, until the sliding groove 5107 at the bottom of the mold 51 is tightly attached to the guide rail 5701, at this time, the bearing column 57 supports the mold 51, and then the head of the bolt blank on the mold 51 is subjected to the stamping operation of the lower punch 301, in the stamping process, the impact force of the lower punch 301 can be transmitted to the bearing column 57 through the mold 51, and the stability of the bearing column 57 ensures the stability of the stamping process, due to the gap between the bottom of the fixing lug 5108 and the top of the support plate 5802, the impact force cannot act on the transmission cylinder 58, so that the rotating structure of the transmission cylinder 58 is protected, and the problem that the impact force generated in the stamping process easily causes damage to the transmission cylinder 58 is solved.

[0060] When the punch forming is completed, the mold 51 is rotated to be discharged by the rotation of the transmission cylinder 58, and in the rotation process, the roller 5903 of the adjusting block 59 is separated from the arc-shaped rail structure at the bottom of the guide plate 309, at this time, the adjusting block 59 loses the extrusion force of the arc-shaped rail structure at the bottom of the guide plate 309, the compression state of the spring 5805 is invalid, the adjusting block 59 gradually moves up, the fixing lug 5108 of the mold 51 loses the elastic force of the spring 5805, so that the sliding groove 5107 at the bottom of the mold 51 is no longer tightly fitted with the guide rail 5701, the friction between the sliding groove 5107 and the guide rail 5701 is reduced, which is beneficial to the smooth rotation of the mold 51.

[0061] When the mold 51 rotates to the bottom of the bearing column 57, the mold 51 is downwardly dropped under the action of its own gravity until the limiting ring 5113 contacts with the adjusting column 5804, the downward drop of the mold 51 is limited, and the mold 51 still remains on the guide rail 5701, so that the derailment phenomenon of the sliding groove 5107 at the bottom of the mold 51 and the guide rail 5701 is avoided, at this time, the structural components of the transmission cylinder 58 support the mold 51, when the mold 51 rotates to the top of the bearing column 57 again, the bearing column 57 supports the mold 51 again, the automatic conversion of the bearing column 57 and the transmission cylinder 58 to support the mold 51 is realized, and the advantage that different effects are realized in different operation stages is achieved.

[0062] As another embodiment of the present application, a side punching channel is formed between the two adjusting cylinders 5901, the side punching channel is aligned with the output end of the guide cylinder 405 and aligned with the input end of the punching groove 5103, and the side punching channel is used to provide a movable channel for the punch of the side punch 401.

[0063] In embodiment three, a production process of a universal bolt is provided, and the production device is used, and the production process comprises the following steps:

[0064] S1, discharging operation, the bolt blank heated to a thermoplastic state is placed in the spherical groove 5101 through an external clamp, so that the screw rod of the bolt blank enters the rod groove 5102, and the head of the bolt blank is positioned in the cavity surrounded by the plurality of shaping ring dies 5104 and the spherical groove 5101;

[0065] S2, the multi-directional punch forming operation is driven by the hydraulic cylinder 308 to drive the lower punch 301 downward, the pressing groove block 304 of the lower punch 301 is pressed into the spherical groove 5101, the head of the bolt blank is pressed to form the shape of the circular arc groove 103, and the arc convex block 303 is pressed to form the shape of the shaft groove 104 on the head of the bolt blank. The pressing cavity 302 cooperates with the spherical groove 5101 and the plurality of shaping ring dies 5104 to press the head of the bolt blank to form the appearance shape of the joint head 1, after completion, the lower punch 301 remains in the state of the punch forming, the head of the bolt blank is positioned again, and then the side punch 401 is driven to punch by the hydraulic cylinder 404. The side punch 401 is punched out of the inner cavity of the guide cylinder 405, enters the punch groove 5103 through the side punch channel, and is in close contact with one of the shaping ring dies 5104 until the side wall of the side punch 401 is in close contact with one of the shaping ring dies 5104. The large punch column 402 penetrates the large punch hole 5105 in the side wall of the plurality of shaping ring dies 5104 and the large through hole 305 in the side wall of the pressing groove block 304, and the small punch column 403 penetrates the small punch hole 5106 in the side wall of the plurality of shaping ring dies 5104 and the small through hole 306 in the side wall of the pressing groove block 304. The head of the bolt blank is punched to form the insertion hole, the fixing hole 101 and the stop hole 102, and the punch forming operation of the joint head 1 is completed;

[0066] S3, the rotation discharging operation is performed after the punch forming of the joint head 1 is completed, the joint head 1 is formed in the spherical groove 5101, and it is difficult to be taken out by clamping. At this time, the gear 55 is rotated by the motor 52, the gear 56 is rotated by the gear 55, the transmission cylinder 58 is rotated around the circumferential outer wall of the supporting column 57 by the gear 56 through the tooth 5801, the transmission rod 5803 on the transmission cylinder 58 penetrates the sliding hole 5109 of the fixing ear 5108 of the mold 51, and then drives the plurality of molds 51 to rotate synchronously. When the mold 51 rotates, the semicircular plate 5112 at the bottom of the mold 51 is in contact with the side wall of the arc convex strip 5702 of the circumferential outer wall of the supporting column 57. As the arc convex strip 5702 gradually thickens from top to bottom, the extrusion force on the semicircular plate 5112 increases, and the semicircular plate 5112 moves towards the mold 51. The movement of the semicircular plate 5112 can push the bottom of the screw rod of the bolt blank, so that the joint head 1 of the bolt blank is separated from the shape of the spherical groove 5101. Until the mold 51 rotates to the lower side of the supporting column 57, the bolt blank is affected by its own gravity and the pushing force of the semicircular plate 5112, and falls out of the spherical groove 5101 and enters the discharging groove 201;

[0067] S4, the automatic conversion support force operation, when the rotating blanking operation is completed, the other mold 51 rotates to the upper of the bearing column 57, enters the station, in the rotating process, the mold 51 is driven by the transmission cylinder 58, the transmission cylinder 58 plays a supporting role to the mold 51, until the roller 5903 of the adjusting block 59 contacts and slides with the circular arc rail structure at the bottom of the guide plate 309, the roller 5903 is extruded downward by the circular arc structure of the guide plate 309, drives the adjusting block 59 to move downward, when the adjusting block 59 moves downward, the spring two 5805 is compressed, because the mold 51 is vertically guided by the plurality of transmission rods 5803, so that the elastic force generated by the spring two 5805 is vertically applied to the top of the fixed lug 5108, the gap between the bottom of the fixed lug 5108 and the top of the support plate 5802 gradually decreases, until the sliding groove 5107 at the bottom of the mold 51 is closely attached to the guide rail 5701, at this time, the bearing column 57 plays a supporting role to the mold 51, guarantees that the downward pressure generated in the stamping process can be applied to the bearing column 57 through the mold 51, avoids affecting the rotating parts, and then another bolt blank in a thermoplastic state is placed into the spherical groove 5101, and the next production cycle is entered.

[0068] The embodiments of the present application are disclosed, but not limited to the preferred embodiments, and the ordinary skilled in the art can easily understand the spirit of the present application according to the above embodiments, and make different inferences and changes, as long as they do not deviate from the spirit of the present application, they are within the protection scope of the present application.

Claims

1. A union bolt, characterized in that, The knuckle head (1) is spherical and has a socket in the side wall for inserting a pin shaft or a bolt to form a connection. The side wall of the knuckle head (1) is also provided with a fixing hole (101) and a stop hole (102), and the top of the knuckle head (1) is provided with a circular arc groove (103) and a shaft groove (104), and the centers of the circular arc groove (103) and the fixing hole (101) are consistent. A plurality of circular arc plates (105) are movably arranged in the circular arc groove (103), and the plurality of circular arc plates (105) are arranged in opposite directions and staggered, and a circular hole structure formed by the plurality of circular arc plates (105) is in communication with the socket structure of the knuckle head (1). One end of the circular arc plate (105) is provided with an upper hole (106) in communication with the fixing hole (101), and the other end is provided with a lower hole (107) in communication with the stop hole (102). The fixing hole (101) and the stop hole (102) are located on the upper and lower sides of the socket, the upper hole (106) is connected with the fixing hole (101) through a half-thread bolt and a nut, and the lower hole (107) is connected with the stop hole (102) through a half-thread bolt and a nut. When the half-thread bolt of the lower hole (107) and the stop hole (102) is disassembled, the plurality of circular arc plates (105) can rotate around the center of the fixing hole (101) as the rotation axis to form a circular hole structure protruding from the top of the knuckle head (1) and aligned with the shaft groove (104), which is used for connecting with the non-open type fixed shaft at both ends.

2. An apparatus for producing a universal bolt, which is suitable for manufacturing the universal bolt according to claim 1, characterized in that, The base (2) is provided with a vertical punching assembly (3), a horizontal punching assembly (4) and a forming assembly (5) on the top. The vertical stamping assembly (3) comprises a lower punch (301), the bottom of the lower punch (301) is provided with a pressing cavity (302), the inner side wall of the pressing cavity (302) is integrally formed with an arc protruding block (303) and a pressing groove block (304), the arc protruding block (303) is used for stamping out the shape of the shaft groove (104), the pressing groove block (304) is used for stamping out the shape of the circular arc groove (103), the side wall of the pressing groove block (304) is provided with a large through hole (305) and a plurality of small through holes (306), the large through hole (305) is used for forming the shape of the insertion hole of the joint head (1), and the small through holes (306) are used for forming the shapes of the fixing hole (101) and the stop hole (102) of the joint head (1); the horizontal stamping assembly (4) comprises a side punch (401), the side wall of the side punch (401) is connected with a large stamping column (402) and a plurality of small stamping columns (403); the forming assembly (5) comprises a mold (51), the top of the mold (51) is provided with a spherical groove (5101), the bottom of the spherical groove (5101) is provided with a rod groove (5102), the top of the mold (51) is also provided with a stamping groove (5103), the inner side wall of the stamping groove (5103) is integrally formed with a plurality of shaping ring dies (5104), the cavity formed by the plurality of shaping ring dies (5104) and the spherical groove (5101) has the same appearance shape as the joint head (1), the side wall of the shaping ring die (5104) is provided with a large stamping hole (5105) and a plurality of small stamping holes (5106), the large stamping hole (5105) is used for providing guidance and positioning for stamping of the large stamping column (402), and the small stamping holes (5106) are used for providing guidance and positioning for stamping of the small stamping columns (403); the stamping groove (5103) is in a communication state with the spherical groove (5101) through the stamping holes of the shaping ring dies (5104); The vertical stamping assembly (3) further comprises a fixing frame (307), the bottom of the fixing frame (307) is connected with a plurality of guide plates (309), and the bottom of the guide plate (309) is in the form of a circular arc track structure; The forming assembly (5) further comprises a plurality of fixing plates (53) arranged on the top of the base (2), the plurality of fixing plates (53) are connected through a bearing column (57), the circumferential outer wall of the bearing column (57) is rotatably connected with a plurality of transmission cylinders (58) through bearings, and a plurality of mold dies (51) are arranged on the circumferential outer wall of the bearing column (57) in a symmetrical structure. The outer wall of the transmission cylinder (58) is also connected with a plurality of support plates (5802), the top of the support plates (5802) is connected with a plurality of transmission rods (5803); the bottom of the mold (51) is provided with a plurality of sliding grooves (5107), the side wall of the mold (51) is connected with a plurality of fixed ears (5108), the fixed ears (5108) are provided with sliding holes (5109) from top to bottom, the transmission rods (5803) are movably penetrated through the sliding holes (5109), when the transmission cylinder (58) rotates, the mold (51) can be driven to rotate synchronously by the transmission rods (5803); the outer wall of the load-bearing column (57) is connected with a plurality of guide rails (5701), the mold (51) is slidably connected with the guide rails (5701) through the sliding grooves (5107); The top of the transmission rod (5803) is connected with an adjusting column (5804), the outer wall of the adjusting column (5804) is sleeved with a spring (5805), the top of the adjusting block (59) is movably provided with a roller (5903), the adjusting column (5804) and the adjusting block (59) are slidably connected, the spring (5805) is arranged between the adjusting block (59) and the fixed ear (5108); When the mold (51) rotates above the load-bearing column (57), the roller (5903) of the adjusting block (59) is in contact with the arc-shaped wheel track structure at the bottom of the guide plate (309) and slides, the roller (5903) is pressed downward by the arc-shaped wheel track structure of the guide plate (309), so that the adjusting block (59) moves downward, until the sliding groove (5107) at the bottom of the mold (51) is tightly attached to the guide rail (5701).

3. The production apparatus according to claim 2, wherein The fixed frame (307) is provided with a hydraulic cylinder (308), and the output end of the hydraulic cylinder (308) is connected with the lower punch (301); the horizontal punching assembly (4) comprises a hydraulic cylinder (404) and a guide cylinder (405) arranged on the top of the base (2), the output end of the hydraulic cylinder (404) is connected with the side punch (401), the side punch (401) is in a cylindrical structure, and the side punch (401) is movably arranged in the inner cavity of the guide cylinder (405); the top of the base (2) is provided with a discharging groove (201), and the discharging groove (201) is arranged below the mold (51).

4. The production apparatus according to claim 3, wherein The forming assembly (5) further comprises a motor (52) and a cover block (54) arranged on the top of the base (2), the output end of the motor (52) is connected with a plurality of gear wheels (55), the output end of the gear wheels (55) is connected with gear wheels (56), a plurality of the gear wheels (55) are coaxially connected and rotatably arranged on the side wall of the fixed plate (53), and the gear wheels (56) are rotatably arranged on the side wall of the fixed plate (53).

5. The production apparatus according to claim 4, wherein The transmission cylinder (58) is arranged with a toothed opening (5801) on the outer wall, and the transmission cylinder (58) is connected with the gear two (56) through the toothed opening (5801).

6. The production apparatus according to claim 5, wherein The outer wall of the load-bearing column (57) is further connected with an arc-shaped protrusion (5702), which is arranged between the two guide rails (5701) and has a circular arc shape and a structure that gradually thickens from top to bottom. The bottom of the mold (51) is movably inserted with a plurality of movable rods (5110), the movable rods (5110) penetrate through the top of the mold (51), the outer wall of the movable rods (5110) is sleeved with a spring one (5111), the bottom of the movable rods (5110) is connected with a semicircular plate (5112), the spring one (5111) is arranged between the semicircular plate (5112) and the mold (51), and the bottom of the semicircular plate (5112) is in contact with the outer wall of the load-bearing column (57). When the mold (51) rotates around the outer wall of the load-bearing column (57) through the guide rail (5701), the semicircular plate (5112) can be in contact with the sidewall of the arc-shaped protrusion (5702) and be pressed by the arc-shaped protrusion (5702).

7. The production apparatus according to claim 6, wherein The bottom of the fixed lug (5108) is in clearance fit with the top of the support plate (5802), the top of the fixed lug (5108) is connected with a limiting ring (5113), and the top of the adjusting column (5804) is connected with a limiting plate (5806).

8. The production apparatus according to claim 7, wherein The bottom of the adjusting block (59) is integrally formed with a plurality of adjusting cylinders (5901), and the inner cavity of the adjusting cylinders (5901) is arranged with a stop block (5902). The adjusting column (5804) and the limiting plate (5806) are movably arranged in the inner cavity of the adjusting cylinder (5901), the spring two (5805) is arranged between the adjusting cylinder (5901) and the fixed lug (5108), and the adjusting block (59) can move in the direction of the adjusting column (5804). When the adjusting block (59) moves to the maximum distance away from the adjusting column (5804), the stop block (5902) is in close contact with the limiting plate (5806).

9. The production apparatus according to claim 8, wherein A side punching channel is formed between the two adjusting cylinders (5901), the side punching channel is aligned with the output end of the guide cylinder (405) and the input end of the punching groove (5103), and the side punching channel is used to provide a movable channel for the punching of the side punch (401).

10. A production process of a universal bolt using the production apparatus according to claim 9, characterized by, The method comprises the following steps: S1, discharging operation, placing the bolt blank heated to a thermoplastic state in the spherical groove (5101) through an external clamp, so that the screw rod of the bolt blank enters the rod groove (5102), and the head of the bolt blank is positioned in the cavity surrounded by the plurality of shaping ring dies (5104) and the spherical groove (5101); S2, the multi-directional punch forming operation is driven by the hydraulic cylinder one (308) to drive the lower punch (301) to punch downward, the pressure groove block (304) of the lower punch (301) is punched into the spherical groove (5101), the head of the bolt blank is punched to form the shape of the circular arc groove (103), similarly, the arc convex block (303) punches the head of the bolt blank to form the shape of the shaft groove (104), the pressure cavity (302) cooperates with the spherical groove (5101) and the plurality of shaping ring dies (5104) to punch the head of the bolt blank to form the appearance shape of the joint head (1), after completion, the lower punch (301) is kept in the state of punch forming, the head of the bolt blank is positioned again, then the side punch (401) is driven by the hydraulic cylinder two (404) to punch, the side punch (401) is punched out of the inner cavity of the guide cylinder (405), enters the punch groove (5103) through the side punch channel, until the side wall of the side punch (401) is attached to one of the shaping ring dies (5104), the large punch column (402) penetrates the large punch hole (5105) in the side wall of the plurality of shaping ring dies (5104) and the large through hole (305) in the side wall of the pressure groove block (304), the small punch column (403) penetrates the small punch hole (5106) in the side wall of the plurality of shaping ring dies (5104) and the small through hole (306) in the side wall of the pressure groove block (304), the head of the bolt blank is punched to form the insertion hole, the fixing hole (101) and the stop hole (102), and the punch forming operation of the joint head (1) is completed; S3, the rotary discharging operation is performed after the punch forming of the joint head (1) is completed, the joint head (1) is formed in the spherical groove (5101), and it is difficult to be taken out by clamping, at this time, the gear one (55) is rotated by driving the motor (52) to work, the gear two (56) is rotated by driving the gear one (55), the gear two (56) rotates the transmission cylinder (58) around the circumferential outer wall of the bearing column (57) through the tooth (5801), the transmission rod (5803) on the transmission cylinder (58) penetrates the sliding hole (5109) of the fixed ear (5108) of the mold (51), and then drives the plurality of molds (51) to rotate synchronously; when the mold (51) rotates, the semicircular plate (5112) at the bottom thereof is in contact with the side wall of the arc convex strip (5702) of the circumferential outer wall of the bearing column (57), as the arc convex strip (5702) gradually thickens from top to bottom, the extrusion force on the semicircular plate (5112) becomes larger, the semicircular plate (5112) moves towards the mold (51), and the movement of the semicircular plate (5112) can push the bottom of the screw rod of the bolt blank, so that the joint head (1) of the bolt blank is separated from the shape of the spherical groove (5101), until the mold (51) rotates to the lower side of the bearing column (57), the bolt blank is affected by its own gravity and the thrust of the semicircular plate (5112), and falls off from the spherical groove (5101) and enters the discharging groove (201); S4, automatically convert support force operation, complete the rotary blanking operation, another mold (51) rotates to the upper of the bearing column (57), enters the station, in the rotating process, the mold (51) is driven by the transmission cylinder (58), the transmission cylinder (58) plays a supporting role to the mold (51), until the roller (5903) of the adjusting block (59) contacts and slides with the arc-shaped wheel rail structure at the bottom of the guide plate (309), the roller (5903) is pressed downward by the arc-shaped structure of the guide plate (309), drives the adjusting block (59) to move downward, when the adjusting block (59) moves downward, spring two (5805) is compressed, because the mold (51) is subjected to the vertical guiding action of multiple transmission rods (5803), the elastic force generated by spring two (5805) acts vertically on the top of the fixed lug (5108), the gap between the bottom of the fixed lug (5108) and the top of the support plate (5802) gradually decreases, until the sliding groove (5107) at the bottom of the mold (51) closely fits with the guide rail (5701), at this time, the bearing column (57) plays a supporting role to the mold (51), ensures that the downward pressure generated in the stamping process can act on the bearing column (57) through the mold (51), avoids affecting the rotating parts, and then puts another bolt blank in the thermoplastic state into the spherical groove (5101), enters the next production cycle.

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