CN112808926A

CN112808926A - Cold heading machine for bolt machining

Info

Publication number: CN112808926A
Application number: CN202011623548.3A
Authority: CN
Inventors: 陈永科; 陈亮科
Original assignee: Handan Yanzhao Fastener Manufacturing Co ltd
Current assignee: Handan Yanzhao Fastener Manufacturing Co ltd
Priority date: 2020-12-31
Filing date: 2020-12-31
Publication date: 2021-05-18
Anticipated expiration: 2040-12-31
Also published as: CN112808926B

Abstract

The invention relates to the technical field of bolt processing, in particular to a cold header for bolt processing, which comprises two wire feeders, a longitudinal plate, a frame disc, a motor, an extension shaft, a first gear, a rotary disc, a cutting knife, a transverse moving device and a first electric push rod, wherein an output shaft end of the first electric push rod is fixedly connected with a linkage plate, the right end of the linkage plate is fixedly connected with two shifting shafts, the right part of a transmission shaft is rotatably matched with a first clamping plate and a second clamping plate, the right end of each transmission shaft is fixedly connected with a limiting boss, the areas of the first clamping plate and the second clamping plate far away from the extension shaft are respectively provided with an inclined long hole, the right end of each shifting shaft respectively penetrates through each corresponding inclined long hole, one end of the first clamping plate close to the extension shaft and one end of the second clamping plate close to the extension shaft are respectively and fixedly connected with a clamping block, the right side of the rotary disc is provided, the processing efficiency is higher.

Description

Cold heading machine for bolt machining

Technical Field

The invention relates to the technical field of bolt machining, in particular to a cold header for bolt machining.

Background

The bolt is a common part in equipment, is widely applied in various industries, has large social demand, and is processed by cutting off an iron rod and then performing cold heading on the head of the iron rod to generate a bolt head convenient for being screwed by a wrench.

Through the retrieval, patent publication No. CN210305577U discloses a punching tool for bolt processing, relate to bolt processing equipment technical field, damage because of the impulsive force is big easily to current cold heading machine drift, and life is short, and change needs to pull down the punching tool, influence the problem of machining efficiency, the scheme is put forward now, it includes the cold heading machine frame, be equipped with the workstation in the cold heading machine frame, be equipped with the mould base on the workstation, install the mould on the mould base, be equipped with the punching tool directly over the mould, the punching tool includes the punching tool casing, the punching tool drift, U-shaped leading truck, the guide bar, spring and supplementary direction slider, the upside fixed mounting of backup pad has the motor, the output shaft end fixedly connected with jib of motor, the other end of jib rotates and is connected with the arm, the gripper is installed to the other end of arm. The utility model discloses can effectively improve the life of drift, still can install new spring under the condition of not dismantling, improve work efficiency, and product processing quality is high, application scope is wide.

The blank of bolt is cut by the user and then put into the punching tool one by one, so that the operation of the user is inconvenient, and the processing efficiency is low.

Disclosure of Invention

Technical problem to be solved

Aiming at the defects of the prior art, the invention provides the cold header for processing the bolt, which is convenient for a user to operate and has higher processing efficiency.

(II) technical scheme

In order to achieve the purpose, the invention provides the following technical scheme: a cold header for bolt processing comprises two wire feeding devices, a longitudinal plate and a frame disc, wherein the upper part and the lower part of the left end of the longitudinal plate are respectively connected with the wire feeding devices, the middle part of the left end of the longitudinal plate is provided with a motor, an output shaft of the motor is fixedly connected with an extension shaft, the middle part of the extension shaft is fixedly connected with a first gear, the right end of the extension shaft penetrates through the middle part of the frame disc, the right end of the extension shaft is fixedly connected with a rotary disc, the upper part and the lower part of the rotary disc are respectively provided with a groove, the inner wall of the groove is provided with a cutting knife, the upper part and the lower part of the rotary disc are respectively provided with a clamping hole, the upper part and the lower part of the longitudinal plate are respectively provided with a transverse moving device, each transverse moving device comprises a transverse plate, one end of each transverse plate, close to the frame disc, is respectively and, each adapter plate is fixedly connected with the outer wall of the circumference of the frame disc, a transmission shaft is matched with the middle part of the support seat in a left-right sliding manner, the left end of the transmission shaft penetrates through the longitudinal plate, a sliding plate is fixedly connected with the middle part of the transmission shaft, two cantilever plates are fixedly connected with the middle part of one end, close to the lengthened shaft, of the transverse plate, guide pipes are fixedly connected with the upper part and the lower part of the longitudinal plate, the right end of each guide pipe is fixedly connected with the left end of the frame disc, a second gear is sleeved on the middle part of each guide pipe and meshed with the first gear, two guide blocks are fixedly connected with the right end of the second gear, the right ends of the guide blocks are inclined, a yielding hole is formed in the middle part of the second gear, a limiting block is fixedly connected with the right end of each cantilever plate, each limiting block is semicircular, a clamping groove corresponding to the second gear is formed in the outer side wall of each, a spring is sleeved on the outer wall of the circumference of the transmission shaft, the left end of the spring is fixedly connected with the right end corresponding to the sliding plate, the right end of the spring is fixedly connected with the left end of the supporting seat, the right part of the transmission shaft is fixedly connected with a circular table, the right end of the circular table is fixedly connected with an extension plate, the right end of the extension plate is fixedly connected with a fixed block, one end of the fixed block is provided with a first electric push rod, the output shaft end of the first electric push rod is fixedly connected with a linkage plate, the right end of the linkage plate is fixedly connected with two shifting shafts, the right part of the transmission shaft is rotatably matched with a first clamping plate and a second clamping plate, the right end of each transmission shaft is fixedly connected with a limiting boss, the areas of the first clamping plate and the second clamping plate, which are far away from the lengthened shaft, are respectively provided with an, the clamping block is fixedly connected to one end, close to the lengthened shaft, of the first clamping plate and one end, close to the lengthened shaft, of the second clamping plate, and the impact device is arranged on the right side of the rotary table.

Preferably, the impact device comprises a frame plate, the four corners of the top of the frame plate are fixedly connected with connecting plates, the left end of each connecting plate is fixedly connected with the right end of each corresponding transverse plate, the upper portion and the lower portion of the frame plate are respectively provided with a second electric push rod, the output shaft of each second electric push rod is fixedly connected with a jacking shaft, and the left end of each jacking shaft is provided with a forming hole.

Preferably, the front part and the rear part of the left end of the frame disc are respectively provided with a third electric push rod, the front part and the rear part of the frame disc are respectively provided with a material passing hole which penetrates left and right, and the output shaft end of each third electric push rod is inserted into each corresponding material passing hole.

Preferably, the outer wall of the circumference of the transmission shaft is sleeved with a wear-resistant sleeve, the left end of the wear-resistant sleeve is fixedly connected with the right end of the sliding plate, and the right end of the wear-resistant sleeve penetrates through the adapter.

Preferably, the clamping block is in a shape of a semicircular pipe.

Preferably, the right end of the cutting knife is connected with the rotary table through a positioning screw, and the upper portion and the lower portion of the rotary table are provided with first yielding grooves corresponding to the cutting knife.

Preferably, the middle part of each cutting knife is provided with a positioning shaft, the right end of the turntable is provided with a positioning plate, the middle part of the positioning plate is fixedly connected with the right part of each positioning shaft, and the outer side wall of the positioning plate is fixedly connected with the turntable.

Preferably, the right end of the turntable is provided with a countersunk hole corresponding to each positioning screw, and the right end of the turntable is provided with a second abdicating groove corresponding to the positioning plate.

(III) advantageous effects

Compared with the prior art, the invention provides a cold header for bolt processing, which has the following beneficial effects:

the cold header for processing the bolt drives the lengthening shaft to rotate through the motor, the lengthening shaft drives the rotary disc to rotate, the rotary disc drives the cutting knife to cut the blank, the lengthening shaft drives the first gear to rotate, the first gear drives the second gear to rotate, the first gear drives the guide block to rotate, the sliding plate is extruded, the transmission shaft is driven to move rightwards, the transmission shaft is driven to move leftwards through the elasticity of the spring, the linkage plate and the shifting shaft are driven to move through the first electric push rod, the shifting shaft is driven to slide in the inclined long holes of the first clamping plate and the second clamping plate, the first clamping plate and the second clamping plate are driven to rotate, the clamping block is driven to move towards the blank through the first clamping plate and the second clamping plate, the blank is clamped and loosened, the cut blank is driven to move leftwards through the spring, the blank is inserted into the clamping hole, and then the clamping block is driven to separate through the first electric push rod, and then the space of the impact device is made free, the blank is impacted through the impact device, and then the head of the screw at the position is impacted, so that the effects of convenience for a user to operate and high processing efficiency are achieved.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is an enlarged view of a portion of FIG. 1A;

FIG. 3 is a schematic front view of the present invention;

FIG. 4 is a schematic cross-sectional perspective view taken along line A-A of FIG. 3 in accordance with the present invention;

FIG. 5 is a schematic cross-sectional perspective view taken along line B-B of FIG. 3 in accordance with the present invention;

FIG. 6 is a schematic cross-sectional perspective view taken at C-C of FIG. 3 in accordance with the present invention;

FIG. 7 is a schematic perspective view of a second gear, a guide block and a limiting block according to the present invention;

fig. 8 is a schematic top view of the cantilever plate, the second gear and the limiting block.

In the figure: 1. a wire feeder; 2. a longitudinal plate; 3. a shelf tray; 4. a motor; 5. lengthening a shaft; 6. a first gear; 7. a turntable; 8. a cutting knife; 9. a transverse plate; 10. a supporting seat; 11. an adapter plate; 12. a drive shaft; 13. a sliding plate; 14. a cantilever plate; 15. a guide tube; 16. a second gear; 17. a guide block; 18. a limiting block; 19. a spring; 20. a circular truncated cone; 21. an extension plate; 22. a fixed block; 23. a first electric push rod; 24. a linkage plate; 25. a shifting shaft; 26. a first clamping plate; 27. a second clamping plate; 28. a limiting boss; 29. a clamping block; 30. a frame plate; 31. a connecting plate; 32. a second electric push rod; 33. jacking the shaft; 34. a third electric push rod; 35. a wear-resistant sleeve; 36. a set screw; 37. positioning the shaft; 38. and (7) positioning the plate.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example (b):

referring to fig. 1-8, a cold header for bolt processing comprises two wire feeders 1, a longitudinal plate 2 and a frame disc 3, wherein the upper part and the lower part of the left end of the longitudinal plate 2 are respectively connected with each corresponding wire feeder 1, a motor 4 is installed in the middle of the left end of the longitudinal plate 2, an output shaft end of the motor 4 is fixedly connected with an extension shaft 5, the middle of the extension shaft 5 is fixedly connected with a first gear 6, the right end of the extension shaft 5 penetrates through the middle of the frame disc 3, the right end of the extension shaft 5 is fixedly connected with a rotary disc 7, the upper part and the lower part of the rotary disc 7 are both provided with grooves, a cutting knife 8 is installed on the inner wall of each groove, the right end of the cutting knife 8 is connected with the rotary disc 7 through a positioning screw 36, and the upper part and the lower part of; the cutting knives 8 are fixed through the positioning screws 36 and the first abdicating grooves, the deflection of the cutting knives 8 is reduced, the middle parts of the cutting knives 8 are provided with positioning shafts 37, the right end of the turntable 7 is provided with a positioning plate 38, the middle parts of the positioning plates 38 are fixedly connected with the right parts of the positioning shafts 37, and the outer side walls of the positioning plates 38 are fixedly connected with the turntable 7; the position of the cutting knife 8 is fixed through the positioning shaft 37, the shaking of the cutting knife 8 is further reduced, and the effect of further improving the use stability is achieved, countersunk holes corresponding to the positioning screws 36 are formed in the right end of the rotary table 7, and second abdicating grooves corresponding to the positioning plates 38 are formed in the right end of the rotary table 7; the occupied space of the positioning screw 36 is reduced through the countersunk hole, the collision condition between the positioning screw 36 and the blank is reduced, the collision condition of the positioning plate 38 and the blank is reduced through the second abdicating groove, the upper part and the lower part of the rotary table 7 are both provided with a clamping hole, the upper part and the lower part of the longitudinal plate 2 are both provided with a transverse moving device, the transverse moving device comprises transverse plates 9, one end of each transverse plate 9 close to the frame disc 3 is fixedly connected with a supporting seat 10, one end of each supporting seat 10 close to the frame disc 3 is fixedly connected with an adapter plate 11, each adapter plate 11 is fixedly connected with the circumferential outer wall of the frame disc 3, the middle part of the supporting seat 10 is matched with a transmission shaft 12 in a left-right sliding manner, the left end of the transmission shaft 12 penetrates through the longitudinal plate 2, the circumferential outer wall of the transmission shaft 12 is sleeved with a wear-resistant sleeve 35, the wear-resistant sleeve 35 is a copper sleeve, the left end of the wear-; the wear-resisting effect of the wear-resisting sleeve 35 is better, so that the wear of the spring 19 and the transmission shaft 12 is reduced.

Further, a sliding plate 13 is fixedly connected to the middle of the transmission shaft 12, two cantilever plates 14 are fixedly connected to the middle of one end of the transverse plate 9 close to the extension shaft 5, guide pipes 15 are fixedly connected to the upper portion and the lower portion of the longitudinal plate 2, the right end of each guide pipe 15 is fixedly connected to the left end of the frame tray 3, a second gear 16 is sleeved on the middle of each guide pipe 15, the second gear 16 is meshed with the first gear 6, two guide blocks 17 are fixedly connected to the right end of the second gear 16, the right end of each guide block 17 is inclined, a relief hole is formed in the middle of each second gear 16, a limiting block 18 is fixedly connected to the right end of each cantilever plate 14, each limiting block 18 is semicircular, a clamping groove corresponding to the second gear 16 is formed in the outer side wall of each limiting block 18, a spring 19 is sleeved on the outer circumferential wall of the transmission shaft 12, and the left end of the spring 19 is fixedly, the right end of the spring 19 is fixedly connected with the left end of the support seat 10, the right part of the transmission shaft 12 is fixedly connected with a circular truncated cone 20, the right end of the circular truncated cone 20 is fixedly connected with an extension plate 21, the right end of the extension plate 21 is fixedly connected with a fixed block 22, one end of the fixed block 22 is provided with a first electric push rod 23, the output shaft end of the first electric push rod 23 is fixedly connected with a linkage plate 24, the right end of the linkage plate 24 is fixedly connected with two shifting shafts 25, the right part of the transmission shaft 12 is rotatably matched with a first clamping plate 26 and a second clamping plate 27, the right end of each transmission shaft 12 is fixedly connected with a limit boss 28, the areas of the first clamping plate 26 and the second clamping plate 27 far away from the lengthened shaft 5 are respectively provided with an inclined long hole, the right end of each shifting shaft 25 respectively passes through each corresponding inclined long hole, one end of the first clamping plate 26 close to the lengthened shaft 5, the clamping block 29 is in a semicircular pipe shape, and the space of the clamping block 29 is saved by the semicircular pipe shape of the clamping block 29.

Further, an impact device is arranged on the right side of the rotary table 7, the impact device comprises a frame plate 30, four corner positions of the top end of the frame plate 30 are fixedly connected with connecting plates 31, the left end of each connecting plate 31 is fixedly connected with the right end of each corresponding transverse plate 9, the upper portion and the lower portion of the frame plate 30 are provided with second electric push rods 32, the output shaft ends of the second electric push rods 32 are fixedly connected with jacking shafts 33, and the left ends of the jacking shafts 33 are provided with forming holes; the second electric push rod 32 drives the jacking shaft 33 to move leftwards, the right part of the blank is extruded through the forming hole of the jacking shaft 33, and then a screw head is impacted, the structure is simple, the front part and the rear part of the left end of the frame disc 3 are respectively provided with the third electric push rod 34, the front part and the rear part of the frame disc 3 are respectively provided with a material passing hole which penetrates through the left and the right, and the output shaft end of the third electric push rod 34 is inserted into each corresponding material passing hole; the left part of the bolt is propped by the third electric push rod 34, and the bolt is driven to fall out of the frame disc 3 after the third electric push rod 34 extends out, so that the effect of conveniently disassembling the bolt is achieved; the lengthening shaft 5 is driven to rotate by the motor 4, the rotating disc 7 is driven to rotate by the lengthening shaft 5, the rotating disc 7 drives the cutting knife 8 to cut the blank, the lengthening shaft 5 drives the first gear 6 to rotate, the first gear 6 drives the second gear 16 to rotate, the first gear 6 drives the guide block 17 to rotate, the sliding plate 13 is extruded, the transmission shaft 12 is driven to move rightwards, the transmission shaft 12 is driven to move leftwards by the elasticity of the spring 19, the linkage plate 24 and the shifting shaft 25 are driven to move by the first electric push rod 23, the shifting shaft 25 is driven to slide in the inclined long holes of the first clamping plate 26 and the second clamping plate 27, the first clamping plate 26 and the second clamping plate 27 are driven to move towards the blank by the first clamping plate 26 and the second clamping plate 27, the blank is clamped and loosened, the cut blank is driven to move leftwards by the spring 19, and then make the stock insert inside the card hole, later drive through first electric putter 23 and press from both sides tight piece 29 separation, and then give up the space of percussion device, strike the stock through percussion device, and then strike department screw head, reach convenient to use person's operation, the higher effect of machining efficiency.

In summary, the working principle and working process of the cold header for processing bolts are that, when in use, firstly, a user starts the motor 4, the motor 4 drives the extension shaft 5 to rotate, the extension shaft 5 drives the rotary disc 7 to rotate, the rotary disc 7 drives the cutting knife 8 to cut the blank, and then the extension shaft 5 drives the first gear 6 to rotate, the first gear 6 drives the second gear 16 to rotate, the first gear 6 drives the guide block 17 to rotate, and then the sliding plate 13 is extruded, and then the transmission shaft 12 is driven to move rightwards, the user extends the output shaft of the first electric push rod 23, the first electric push rod 23 drives the linkage plate 24 and the shifting shaft 25 to move, and then drives the shifting shaft 25 to slide in the inclined long holes of the first clamping plate 26 and the second clamping plate 27, and then drives the first clamping plate 26 and the second clamping plate 27 to rotate, and drives the clamping block 29 to move towards the blank through the first clamping plate 26 and the second clamping plate 27, and then the blank is clamped and loosened, the cut blank is driven to move leftwards by the spring 19, then the blank is inserted into the clamping hole, then the clamping block 29 is driven to separate by the first electric push rod 23, the user extends the output shaft of the second electric push rod 32, then the jacking shaft 33 is driven to impact the blank, then the second electric push rod 32 is retracted, the third electric push rod 34 extends, and then the bolt is ejected.

The motor 4 is a servo motor 4 with the model number of SM40-030, the motor 4 is a known device directly purchased from the market and used by people in the field, and structural and functional improvements are not performed on the motor 4, so that detailed description is omitted, the motor 4 is provided with a control switch matched with the motor 4, and the installation position of the control switch is selected according to actual use requirements, so that an operator can conveniently perform operation control.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a cold heading machine is used in bolt processing, includes two wire drive feed unit (1), its characterized in that: the wire feeding device is characterized by further comprising a longitudinal plate (2) and a frame disc (3), the upper portion and the lower portion of the left end of the longitudinal plate (2) are respectively connected with the wire feeding devices (1) correspondingly, a motor (4) is installed in the middle of the left end of the longitudinal plate (2), an extension shaft (5) is fixedly connected with an output shaft of the motor (4), a first gear (6) is fixedly connected with the middle of the extension shaft (5), the right end of the extension shaft (5) penetrates through the middle of the frame disc (3), a rotary disc (7) is fixedly connected with the right end of the extension shaft (5), grooves are formed in the upper portion and the lower portion of the rotary disc (7), a cutting knife (8) is installed on the inner wall of each groove, clamping holes are formed in the upper portion and the lower portion of the rotary disc (7), transverse moving devices are arranged in the upper portion and the lower portion of the longitudinal plate (2), and each, one end of each transverse plate (9) close to the frame disc (3) is fixedly connected with a support seat (10), one end of each support seat (10) close to the frame disc (3) is fixedly connected with an adapter plate (11), each adapter plate (11) is fixedly connected with the circumferential outer wall of the frame disc (3), the middle part of each support seat (10) is in sliding fit with a transmission shaft (12) from left to right, the left end of each transmission shaft (12) penetrates through the longitudinal plate (2), the middle part of each transmission shaft (12) is fixedly connected with a sliding plate (13), the middle part of one end of each transverse plate (9) close to the lengthened shaft (5) is fixedly connected with two cantilever plates (14), the upper part and the lower part of each longitudinal plate (2) are fixedly connected with guide pipes (15), the right end of each guide pipe (15) is fixedly connected with the left end of the frame disc (3), and the middle part of each guide pipe (15) is sleeved with a second gear (16), the second gear (16) is meshed with the first gear (6), the right end of the second gear (16) is fixedly connected with two guide blocks (17), the right end of each guide block (17) is inclined, a yielding hole is formed in the middle of each second gear (16), the right end of each cantilever plate (14) is fixedly connected with a limiting block (18), each limiting block (18) is semicircular, a clamping groove corresponding to the second gear (16) is formed in the outer side wall of each limiting block (18), a spring (19) is sleeved on the outer circumferential wall of the transmission shaft (12), the left end of the spring (19) is fixedly connected with the right end of the corresponding sliding plate (13), the right end of the spring (19) is fixedly connected with the left end of the supporting seat (10), a circular table (20) is fixedly connected with the right portion of the transmission shaft (12), and an extension plate (21) is fixedly connected with the right end of the circular table (20), the right end of the extension plate (21) is fixedly connected with a fixed block (22), one end of the fixed block (22) is provided with a first electric push rod (23), an output shaft end of the first electric push rod (23) is fixedly connected with a linkage plate (24), the right end of the linkage plate (24) is fixedly connected with two shifting shafts (25), the right part of the transmission shaft (12) is rotatably matched with a first clamping plate (26) and a second clamping plate (27), the right end of each transmission shaft (12) is fixedly connected with a limiting boss (28), the areas of the first clamping plate (26) and the second clamping plate (27) far away from the lengthened shaft (5) are respectively provided with an inclined long hole, the right end of each shifting shaft (25) respectively penetrates through each corresponding inclined long hole, one end of the first clamping plate (26) close to the lengthened shaft (5) and one end of the second clamping plate (27) close to the lengthened shaft (5) are respectively and fixedly connected with a clamping block (29), and an impact device is arranged on the right side of the rotary table (7).

2. The cold heading machine for bolt machining according to claim 1, wherein: the impact device comprises a frame plate (30), connecting plates (31) are fixedly connected to four corner positions of the top end of the frame plate (30), the left end of each connecting plate (31) is fixedly connected with the right end of each corresponding transverse plate (9), second electric push rods (32) are arranged on the upper portion and the lower portion of the frame plate (30), a jacking shaft (33) is fixedly connected to the output shaft end of each second electric push rod (32), and a forming hole is formed in the left end of each jacking shaft (33).

3. The cold heading machine for bolt machining according to claim 2, wherein: third electric push rods (34) are mounted on the front portion of the left end and the rear portion of the left end of the frame disc (3), material passing holes penetrating left and right are formed in the front portion and the rear portion of the frame disc (3), and output shaft ends of the third electric push rods (34) are inserted into the corresponding material passing holes.

4. The cold heading machine for bolt machining according to claim 3, wherein: the transmission shaft is characterized in that a wear-resistant sleeve (35) is sleeved on the circumferential outer wall of the transmission shaft (12), the left end of the wear-resistant sleeve (35) is fixedly connected with the right end of the sliding plate (13), and the right end of the wear-resistant sleeve (35) penetrates through the adapter.

5. The cold heading machine for bolt machining according to claim 4, wherein: the clamping block (29) is in a semicircular tube shape.

6. The cold heading machine for bolt machining according to claim 5, wherein: the right end of the cutting knife (8) is connected with the rotary table (7) through a positioning screw (36), and the upper portion and the lower portion of the rotary table (7) are provided with first yielding grooves corresponding to the cutting knife (8).

7. The cold heading machine for bolt machining according to claim 6, wherein: the middle part of each cutting knife (8) is provided with a positioning shaft (37), the right end of the turntable (7) is provided with a positioning plate (38), the middle part of the positioning plate (38) is fixedly connected with the right part of each positioning shaft (37), and the outer side wall of the positioning plate (38) is fixedly connected with the turntable (7).

8. The cold heading machine for bolt machining according to claim 7, wherein: the right end of the rotary table (7) is provided with countersunk holes corresponding to the positioning screws (36), and the right end of the rotary table (7) is provided with a second abdicating groove corresponding to the positioning plate (38).