CN116140723A

CN116140723A - Fixing bolt processing mantle fiber device

Info

Publication number: CN116140723A
Application number: CN202310431617.8A
Authority: CN
Inventors: 王长玉; 张卫华; 王杰; 张冬萍; 李林
Original assignee: Jiangsu Jiajie Special Screw Co ltd
Current assignee: Jiangsu Jiajie Special Screw Co ltd
Priority date: 2023-04-21
Filing date: 2023-04-21
Publication date: 2023-05-23

Abstract

The application relates to the technical field related to threading equipment, the utility model discloses a fixing bolt processing threading device, three-jaw chuck through on the three-jaw lathe carries out the centre gripping to the arrangement pipe, set up the logical groove that the cross-section is hexagon in the arrangement pipe, guarantee the threading in-process, can place the bolt in succession in the arrangement pipe, fix a position and prevent rotating according to nut hexagon and logical groove on the bolt, guarantee that the cylinder in the bolt outside can all stretch out and carry out the threading work, and the hexagon nut of leaving has ensured that the bolt can not appear pivoted phenomenon when the threading, ensure fixed intensity, realized continuous pay-off and fixed anti-rotation's effect.

Description

Fixing bolt processing mantle fiber device

Technical Field

The application relates to the technical field related to threading equipment, in particular to a threading device for processing a fixing bolt.

Background

The threading is a mode that a bolt is fixed on a hydraulic press of a three-jaw chuck, and then external threads are machined on a round bolt rod through a threading die.

In the existing bolt threading process, the three-jaw chuck is utilized to fix and rotate the bolts, and only one bolt can be fixed at a time when the three-jaw chuck hydraulic press is used for fixing the bolts, so that when batch threading is needed, the labor intensity of workers is increased due to single clamping, and the threading efficiency is low.

When the three-jaw chuck is used for fixing bolts, the phenomenon that the clamping is unstable and rotation is easy to occur is caused by clamping the side wall of the cylinder, and the cylinder at the clamping part cannot perform threading work to influence threading efficiency, so that a threading device capable of preventing the bolts from rotating during continuous and processing is required.

Disclosure of Invention

The application provides a fixing bolt processing mantle fiber device, possesses continuous pay-off and fixed rotation-proof advantage for solve unable continuous pay-off and the easy pivoted problem of bolt mantle fiber in-process that proposes among the above-mentioned prior art.

In order to achieve the above purpose, the present application adopts the following technical scheme: a set screw machining mantle fiber device, comprising: the surface of the supporting frame is fixedly provided with a guide rod, the end part of the guide rod is fixedly provided with a three-jaw machine tool through a bolt, the three-jaw machine tool is fixedly provided with a finishing pipe through a three-jaw chuck, a through groove with a hexagonal section is formed in the finishing pipe, the finishing pipe is vertically arranged, the bottom of the side wall of the finishing pipe is movably provided with an anti-falling ejector rod positioned below the three-jaw machine tool, the top end of the anti-falling ejector rod is fixedly provided with a limit head positioned in the through groove in the finishing pipe, the limit head is in sliding connection with the inside of the finishing pipe, one side of the limit head is movably provided with a spring positioned in the finishing pipe, and the spring ejects the limit head to lock the bolt at the bottom of the finishing pipe;

the side wall of the guide rod is movably provided with a die holder positioned below the three-jaw machine tool, and a screw thread cutter is arranged in the die holder;

the top end surface of the die holder is provided with an oblique angle, the end part of the anti-drop ejector rod is in threaded connection with a drop-off adjusting rod, and the lowest sliding position of the die holder on the guide rod is used for opening the screw thread cutter.

Further, the top end of the separation adjusting rod is connected with a handle, and the bottom end of the separation adjusting rod is connected with a sliding ball.

Further, the cross section shape of the limit number head is set to be a vertically arranged u shape, an oblique angle is arranged on the top end face of the limit number head, the bottom end length of the limit number head is twice the top end length, and the limit number head is clamped on a nut of a bolt to limit the bolt to descend.

Further, the top end of the finishing tube extends to the outer side of the top of the three-jaw machine tool.

Further, articulated on the guide bar have the stripper that is located the die holder below, and the lateral wall of stripper articulates there is the connecting rod, and the connecting rod articulates the bottom at the die holder, the surface both sides of stripper are fixedly connected with baffle respectively, the inboard fixed mounting of baffle has the measuring rod that is located stripper surface top, the controller is installed to the lateral wall of support frame, measuring rod and stripper pass through the wire and switch on with the controller, the surface fixed mounting of support frame has the lift cylinder that is located the stripper below, the surface fixed mounting of support frame has the air pump to the lift cylinder air feed, is connected with the electricity between air pump and the controller, the lateral wall fixed mounting of arrangement pipe has fixed wire loop, and the lateral wall of arrangement pipe has the movable conducting ring through bolt fastening, be provided with on the controller respectively with fixed wire loop and movable conducting ring sliding connection's connect the brush head, the inboard fixed mounting of arrangement pipe with limit the relative contact detection head, contact detection is connected through the wire with fixed wire loop, movable conducting ring and fixed wire loop are used for detecting the bolt lock position in the arrangement bottom in the arrangement pipe jointly.

Further, a limit switch positioned below the die frame is fixedly arranged on the side wall of the guide rod, and the limit switch is positioned at the lowest descending position of the die frame.

Further, the stripper plate is a metal plate, and the baffle is made of rubber.

Further, an electric bell for alarming is arranged on the controller, the controller is divided into a main circuit and two branch circuits, the two branch circuits are connected in parallel, and the parallel branch circuits are connected in series with the main circuit;

the main route is formed by connecting a power supply, a protection resistor, a main switch and a limit switch in series;

a branch circuit is connected in series with the bell by a delay starting switch;

the other branch circuit is connected in series by the stripper plate, the detection rod, the fixed wire ring, the movable conductive ring and the air pump.

Further, the limit switch is a delay closing switch, and the limit switch and the delay starting switch are started simultaneously, and the starting time of the delay starting switch is ten to fifteen seconds longer than the closing time of the limit switch.

Further, the distance between the movable conducting ring and the fixed conducting ring is equal to the length of the cylindrical side wall of the bolt to be processed.

The utility model provides a pair of fixing bolt processing mantle fiber device, three jaw chuck through on the three jaw lathe carries out the centre gripping to the arrangement pipe, set up the logical groove that the cross-section is hexagon in the arrangement pipe, guarantee mantle fiber in-process, can place the bolt in succession in the arrangement pipe, fix a position and prevent rotating according to nut hexagon and logical groove on the bolt, guarantee that the cylinder in the bolt outside can all stretch out and carry out mantle fiber work, and the hexagon nut that leaves has ensured that the bolt can not appear pivoted phenomenon when mantle fiber, guarantee fixed intensity, realized continuous pay-off and fixed anti-rotation's effect.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description, serve to explain the principles of the disclosure.

The disclosure may be more clearly understood from the following detailed description taken in conjunction with the accompanying drawings in which:

FIG. 1 is an overall front perspective view;

FIG. 2 is an overall back perspective view;

FIG. 3 is a cross-sectional view of the finishing tube as a whole;

FIG. 4 is a cross-sectional view at A in FIG. 3;

FIG. 5 is a structural layout of the anti-drop ejector rod;

FIG. 6 is a schematic view of placement of bolts of different lengths;

FIG. 7 is a schematic diagram of a bolt inversion;

FIG. 8 is an inverted view of two bolts;

fig. 9 is a schematic diagram of the circuitry in the controller.

In the figure: 1. a support frame; 2. a guide rod; 3. an air pump; 4. an electric bell; 5. a controller; 6. three-jaw machine tool; 7. a movable conductive ring; 8. fixing the wire ring; 800. a contact detection head; 9. a finishing tube; 10. a thread cutter; 11. a die holder; 12. a connecting rod; 13. a detection rod; 14. a stripper plate; 15. a lifting cylinder; 16. connecting a brush head; 17. an anti-drop ejector rod; 18. disengaging the adjustment rod; 19. a limit switch; 20. a limit number head; 21. and (3) a spring.

Detailed Description

The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.

Embodiment one: referring to fig. 1-5, four guide rods 2 are fixedly installed on the surface of a support frame 1, three-jaw machine tools 6 are fixedly installed at the end portions of the guide rods 2 through bolts, finishing pipes 9 are fixedly installed on the three-jaw machine tools 6 through three-jaw chucks, through grooves with hexagonal cross sections are formed in the finishing pipes 9, the finishing pipes 9 are vertically arranged, anti-falling ejector rods 17 located below the three-jaw machine tools 6 are movably installed at the bottoms of the side walls of the finishing pipes 9, limit heads 20 located in the through grooves in the finishing pipes 9 are fixedly installed at the top ends of the anti-falling ejector rods 17, the limit heads 20 are in sliding connection with the inside of the finishing pipes 9, springs 21 located in the finishing pipes 9 are movably installed on one sides of the limit heads 20, the limit heads 20 are ejected out through the springs 21, bolts at the bottoms of the finishing pipes 9 are locked, and the phenomenon that the bolts in the finishing pipes 9 are directly output from the through grooves is avoided.

The side wall movable mounting of guide bar 2 has die holder 11 that is located three-jaw lathe 6 below, installs screw die 10 in the die holder 11, and die holder 11 and screw die 10 still continue current general equipment, and the current mode of operation of die holder 11 is: when the threading machine works, firstly, a bolt of a thread to be processed is put into a chuck, the bolt is impacted and clamped, a starting switch is pressed, the bolt rotates along with a three-jaw chuck, the size of a die opening on a die head is adjusted, the length of a thread opening is set, then a feed hand wheel is pulled clockwise, a die cutter on the die head is tightly attached to the end part of the rotating bolt with constant force, the die cutter can automatically cut threading, a cooling system automatically sprays oil for the die cutter and cools the die cutter, when a thread opening is processed to a preset length, the die cutter can automatically open, the thread opening processing is finished, the top end surface of a die holder 11 is provided with an oblique angle, meanwhile, the end part of an anti-falling ejector rod 17 is connected with a separation adjusting rod 18 in a threaded manner, the top end of the separation adjusting rod 18 is connected with a handle, the bottom end is connected with a sliding ball, and the lowest sliding position of the die holder 11 on a guide rod 2 realizes the opening of the thread cutter 10.

The cross section shape of the limit head 20 is set to be a vertically arranged u shape, and the top end surface of the limit head 20 is provided with an oblique angle, so that when the bolt descends in the arrangement pipe 9, the limit head 20 pushes the spring 21 to compress through the oblique angle at the top of the limit head 20, the bottom end length of the limit head 20 is twice as long as the top end length, the u-shaped opening length of the limit head 20 is matched with the height of a screw cap on the bolt, the bolt can be ensured to descend, the limit head 20 is clamped on the screw cap, the structure inside the arrangement pipe 9 is combined to prevent rotation, and meanwhile, the limit head 20 limits the bolt to descend, so that the cylindrical outer side of the bolt can fully stretch out to perform threading work.

The top of arrangement pipe 9 stretches out to the top outside of three-jaw lathe 6 to can place a plurality of bolts in making arrangement pipe 9, and when actual production, carry out the material loading through vibration screening machine, can carry out continuous bolt and supplement in the arrangement pipe 9, and after the increase of the bolt quantity of storage in the arrangement pipe 9, combine arrangement pipe 9 to be vertical and arrange, the bolt of arrangement pipe 9 bottom is pushed down by a plurality of bolt gravities in top, more easily promotes limit head 20 suppression spring 21.

When in use, the utility model is characterized in that:

the adjusting rod 18 is adjusted to be separated from the proper height, then the bolt is placed in the arranging pipe 9, the side face of the cylinder of the bolt is placed downwards, after passing through the limit head 20, the limit head 20 is pushed to press the spring 21, then the descending nut is blocked by the limit head 20, the limiting bolt moves downwards again, at this time, the bolt is limited by the arranging pipe 9 and cannot rotate, and the outer side of the cylinder is fully extended to the outer side of the bottom of the arranging pipe 9.

The three-jaw machine tool 6 drives the finishing tube 9 to rotate to push the threading die frame 11 to move upwards, when the threading die frame 10 contacts the bolt, the rotating bolt can enable the threading die 10 to move upwards continuously, when the threading die frame 11 approaches to and contacts the separation adjusting rod 18, the separation adjusting rod 18 is forced to pull the separation preventing ejector rod 17 to compress the spring 21 outwards through the oblique angle at the top of the threading die frame 11, when the limit head 20 is completely separated from the bolt, the threading die frame 11 is enabled to be driven by the gravity of the threading die frame 11 to move downwards, and when the threading die frame 11 moves downwards to the bottommost position, the threading die 10 is opened to enable the bolt after threading to fall out, and when the bolt at the bottom of the finishing tube 9 falls out, the bolt in the finishing tube 9 moves downwards to perform feeding again, and finally autonomous continuous feeding is achieved.

Embodiment two: further improvements are made on the basis of the first embodiment.

Referring to fig. 1-3, in order to collect the dropped bolts on the die holder 11, meanwhile, the bolts in the finishing tube 9 are intermittently ejected and matched by the die holder 11, so as to realize continuous processing of the bolts, in this embodiment, a stripper plate 14 positioned below the die holder 11 is hinged on the guide rod 2, a connecting rod 12 is hinged on the side wall of the stripper plate 14, and the connecting rod 12 is hinged at the bottom of the die holder 11, and in the process of moving up and down the die holder 11, the stripper plate 14 is pulled to move up and down by the connecting rod 12, so that the surface of the stripper plate 14 is inclined, and the bolts on the stripper plate 14 are easy to move towards a specific direction.

The baffle is fixedly connected with two sides of the surface of the stripper plate 14 respectively, the baffle is made of non-conductive materials, such as rubber, the stripper plate 14 is made of metal plates, the detection rod 13 positioned above the surface of the stripper plate 14 is fixedly installed on the inner side of the baffle, the detection rod 13 is positioned on one side of the connecting rod 12, the controller 5 is installed on the side wall of the support frame 1, the detection rod 13 and the stripper plate 14 are communicated with the controller 5 through wires, after the die holder 11 descends to the bottom, the detection rod 13 deflects downwards, the height of the detection rod 13 is lower than the hinging position of the stripper plate 14 and the guide rod 2, after the bolts after threading in the die holder 11 fall onto the stripper plate 14, the bolts slide on the surface of the stripper plate 14 until being blocked by the detection rod 13, the detection rod 13 is communicated with the stripper plate 14 through the bolts to form a passage, and when the height of the detection rod 13 is higher than the hinging position of the stripper plate 14 and the guide rod 2, the bolts can be far away from the detection rod 13, so that the bolts are discharged.

In order to realize that the die holder 11 can be lifted automatically, therefore, the lifting cylinder 15 positioned below the stripper plate 14 is fixedly arranged on the surface of the support frame 1, the lifting cylinder 15 is positioned below the detection rod 13, so that when the lifting cylinder 15 is lifted, the stripper plate 14 synchronously pushes the die holder 11 to move upwards through the connecting rod 12, the screw thread cutter 10 can reach the bottom of a screw thread to be sleeved, automatic threading is realized, the air pump 3 for supplying air to the lifting cylinder 15 is fixedly arranged on the surface of the support frame 1, the air pump 3 is electrically connected with the controller 5, the on-off of the air pump 3 is controlled through the controller 5, and the lifting cylinder 15 can push the stripper plate 14 to move upwards.

The side wall of the finishing tube 9 is fixedly provided with a fixed wire ring 8, the side wall of the finishing tube 9 is provided with a movable conducting ring 7 fixed by bolts, the movable conducting ring 7 and the fixed wire ring 8 are circular, the controller 5 is respectively provided with a contact brush head 16 which is in sliding connection with the fixed wire ring 8 and the movable conducting ring 7, the inner side of the finishing tube 9 is fixedly provided with a contact detection head 800 which is opposite to the limit head 20, the contact detection head 800 is connected with the fixed wire ring 8 by wires, the movable conducting ring 7 and the fixed wire ring 8 jointly act to detect whether a bolt at the bottom of the finishing tube 9 is locked in place, the fixed wire ring 8 is connected with the contact detection head 800 by wires, when the bolt is blocked by the limit head 20, the contact detection head 800 transmits electricity to the bolt, and after the movable conducting ring 7 receives the current on the bolt, the contact detection head 16 flows back to form a passage, so that whether the bolt at the bottom of the finishing tube 9 is blocked is detected.

The side wall of the guide rod 2 is fixedly provided with a limit switch 19 positioned below the die holder 11, the limit switch 19 is positioned at the lowest descending position of the die holder 11, and when the die holder 11 contacts the limit switch 19, the limit switch 19 is turned on and simultaneously the screw thread cutter 10 is turned on, so that the locking of the screw bolt is released.

When in use, the utility model is characterized in that:

after threading is completed and the threading tool 10 descends, when the die holder 11 contacts the limit switch 19, the limit switch 19 is turned on.

The threaded bolt falls onto the surface of the stripper plate 14, and at this time, the detecting rod 13 is lower than the hinge joint position of the stripper plate 14 and the guide rod 2, the threaded bolt after threading is blocked by the detecting rod 13, and the detecting rod 13 and the stripper plate 14 are connected, which means that the threaded bolt in the screw thread cutter 10 has fallen.

After the bolts at the bottom of the sorting tube 9 are output, the bolts in the sorting tube 9 can descend again and are blocked by the limit number head 20, and the movable conducting ring 7 and the fixed conducting ring 8 are communicated with the bolts through the contact detection head 800, so that the completion of placing the bolts at the bottom of the sorting tube 9 is indicated.

When the movable conducting ring 7 is connected with the fixed conducting ring 8, the limit switch 19 is connected, the detection rod 13 and the stripper plate 14 are synchronously connected, the air pump 3 starts to work, the air flow is sent into the lifting cylinder 15 so that the stripper plate 14 is pushed upwards, the screw thread cutter 10 is sent onto a bolt at the bottom of the finishing tube 9, the screw thread cutter 10 is driven to rotate through the finishing tube 9, the screw thread cutter 10 further ascends along the bolt, one side of the detection rod 13 is pulled to rise gradually, after the whole detection rod 13 is higher than the hinging position of the stripper plate 14 and the guide rod 2, the bolt falls out from the stripper plate 14, after the bolt and the detection rod 13 are separated, the air pump 3 does not work any more, the lifting cylinder 15 does not ascend, and the air rod falls back by self gravity.

Finally, after the die holder 11 moves upward and contacts the detachment adjusting rod 18, the detachment adjusting rod 18 is pushed to enable the limit head 20 to be far away from the bolt, the bolt falls from the arranging pipe 9, the die holder 11 falls under the self gravity, the limit switch 19 is contacted, the limit switch 19 is turned on, then the bolt on the screw thread cutter 10 falls on the stripper plate 14 again, the detection rod 13 is contacted, then, when the detection rod 13 is turned on with the stripper plate 14, the limit switch 19 is turned on, the movable conducting ring 7 is turned on with the fixed conducting ring 8, the normal operation of the equipment is illustrated, the lifting cylinder 15 is pushed up again, and the automatic threading processing is realized.

Embodiment III: is a further improvement on the basis of the second embodiment.

In order to further ensure the disclosure of the electric control in the second embodiment, meanwhile, in the process of inputting the bolts into the arranging pipe 9, as shown in fig. 6, vertical lines on two sides in the drawing indicate the arranging pipe 9, a T-shape in the middle indicates a bolt placement mode, the modes shown in fig. 7 and 8 are the same as those shown in fig. 6, a longer or too short phenomenon occurs in the bolts placed in the arranging pipe 9, and the threading process is automatic for setting the length of the fixing bolts, so that normal threading work cannot be performed when the bolts with different lengths are placed.

Referring to fig. 1 and 9, an electric bell 4 for alarming is arranged on a controller 5, and the controller 5 is divided into a main circuit and two branch circuits, wherein the two branch circuits are connected in parallel, and the parallel branch circuits are connected in series with the main circuit.

The main circuit is formed by connecting a power supply, a protection resistor, a main switch and a limit switch 19 in series.

A branch circuit is connected in series with the bell 4 by a delay start switch.

The other branch circuit is connected in series with the stripper plate 14, the detection rod 13, the fixed conducting ring 8, the movable conducting ring 7 and the air pump 3.

The limit switch 19 is a delay closing switch, and the limit switch 19 and the delay starting switch are started simultaneously, and the starting time of the delay starting switch is ten to fifteen seconds longer than the closing time of the limit switch 19.

The distance between the movable conducting ring 7 and the fixed conducting ring 8 is equal to the length of the cylindrical side wall of the bolt to be processed.

When the screw bolt is normally placed, the screw bolt at the bottom of the arranging pipe 9 is fixed by the limited number head 20, the screw bolt at the upper part is enabled to be in contact with a nut on the screw bolt normally due to the length of the required threading length, as shown in the attached figure 3, when the screw bolt on the screw thread cutter 10 falls onto the stripper plate 14, the screw thread cutter frame 11 presses the limit switch 19, the detection rod 13 is connected with the stripper plate 14, the air pump 3 is started due to the connection of the limit switch 19, the stripper plate 14, the detection rod 13, the fixed wire ring 8 and the movable conductive ring 7, the lifting cylinder 15 pushes the stripper plate 14 to ascend, the screw thread cutter frame 11 starts to be separated from the limit switch 19, and the limit switch 19 is a delay closing switch.

Since the off time of the limit switch 19 is faster than the on time of the delay off switch, when the limit switch 19 is turned off, the delay off switch is not turned off yet, so that the bell 4 does not make a sound.

As shown in fig. 6, when the bolts are of different lengths, in order to prevent the problem of the mechanism threading, when the longer or shorter bolts are pressed on the bolt at the bottommost part of the finishing tube 9, the longer or shorter bolts are not in contact with the movable conductive ring 7, so that the movable conductive ring 7 and the fixed conductive ring 8 are not communicated, the air pump 3 cannot work, the stripper plate 14 cannot ascend, the limit switch 19 is continuously pressed, the phenomenon of disconnection cannot occur, and after the timing of the delay starting switch is finished, the bell 4 can make sound, thereby being used for warning operators that abnormal bolt processing occurs.

Referring to fig. 7, when the nut on one bolt is attached to the lowest bolt on the finishing tube 9, the movable conductive ring 7 is not contacted with the bolt, and the bell 4 sounds as well.

Referring to fig. 8, when two nuts are continuously put down, although the movable conductive ring 7 can be electrically connected with the fixed conductive ring 8, when the inverted bolts are blocked by the limiting heads 20, the lifting cylinder 15 pushes the stripper plate 14 to move up, the ascending stripper plate 14 drives the die rack 11 to move up, at this time, the bolts at the bottom of the finishing tube 9 do not extend out, the screw thread knife 10 cannot contact with the bolts, so that the lifting cylinder 15 pushes the stripper plate 14 up, the lifting cylinder 15 can quickly push the stripper plate 14 to lift, the machined bolts can be separated from the surface of the stripper plate 14 after the stripper plate 14 is quickly deflected, and after the timing of the limit switch 19 is finished, the stripper plate 14 and the die rack 11 directly move down under the action of gravity, the limit switch 19 is pressed again, no bolts are placed above the stripper plate 14, the detection rod 13 and the stripper plate 14 are not connected, and finally the electric bell 4 can still sound, so that the phenomenon of error machining caused by the inversion of two standard bolts is avoided.

Claims

1. The utility model provides a fixing bolt processing mantle fiber device which characterized in that includes: the three-jaw machine tool is characterized in that a guide rod (2) is fixedly arranged on the surface of the support frame (1), a three-jaw machine tool (6) is fixedly arranged at the end part of the guide rod (2) through bolts, a sorting pipe (9) is fixedly arranged on the three-jaw machine tool (6) through a three-jaw chuck, a through groove with a hexagonal cross section is formed in the sorting pipe (9), the sorting pipe (9) is vertically arranged, an anti-falling ejector rod (17) positioned below the three-jaw machine tool (6) is movably arranged at the bottom of the side wall of the sorting pipe (9), a limit head (20) positioned in the through groove in the sorting pipe (9) is fixedly arranged at the top end of the anti-falling ejector rod (17), the limit head (20) is in sliding connection with the inside of the sorting pipe (9), a spring (21) positioned inside the sorting pipe (9) is movably arranged at one side of the limit head (20), and the spring (21) ejects the limit head (20) to lock the bolts at the bottom of the sorting pipe (9);

the side wall of the guide rod (2) is movably provided with a die holder (11) positioned below the three-jaw machine tool (6), and a screw thread cutter (10) is arranged in the die holder (11);

the top end surface of the die holder (11) is provided with an oblique angle, the end part of the anti-falling ejector rod (17) is in threaded connection with a separation adjusting rod (18), and the lowest sliding position of the die holder (11) on the guide rod (2) is used for opening the screw thread cutter (10).

2. The fixing bolt processing threading device according to claim 1, wherein a handle is connected to the top end of the detachment adjusting lever (18), and a sliding ball is connected to the bottom end of the detachment adjusting lever (18).

3. The fixed bolt processing threading device according to claim 1, wherein the sectional shape of the limit head (20) is set to be a vertically arranged u shape, an oblique angle is arranged on the top end surface of the limit head (20), the bottom end length of the limit head (20) is twice as long as the top end length, and the limit head (20) is clamped on a nut of the bolt to limit the bolt to descend.

4. The fixing bolt processing threading device according to claim 1, characterized in that the top end of the finishing tube (9) protrudes outside the top of the three-jaw machine tool (6).

5. The fixed bolt processing threading device of claim 1, wherein the guide rod (2) is hinged with a stripper plate (14) positioned below the die holder (11), the side wall of the stripper plate (14) is hinged with a connecting rod (12), the connecting rod (12) is hinged at the bottom of the die holder (11), two sides of the surface of the stripper plate (14) are respectively and fixedly connected with a baffle, the inner side of the baffle is fixedly provided with a detection rod (13) positioned above the surface of the stripper plate (14), the side wall of the support frame (1) is provided with a controller (5), the detection rod (13) and the stripper plate (14) are communicated with the controller (5) through wires, the surface of the support frame (1) is fixedly provided with a lifting cylinder (15) positioned below the stripper plate (14), the surface of the support frame (1) is fixedly provided with an air pump (3) for supplying air to the lifting cylinder (15), the air pump (3) is electrically connected with the controller (5), the side wall of the finishing tube (9) is fixedly provided with a detection rod (13) positioned above the surface of the stripper plate (14), the side wall of the finishing tube (9) is fixedly provided with a fixed wire ring (8), the side wall of the finishing tube (9) is fixedly connected with a movable wire ring (7) through a conductive ring (7) and a movable wire ring (16) arranged on the movable wire ring (7), the inside fixed mounting of arrangement pipe (9) has contact detection head (800) relative with limit number head (20), contact detection head (800) are connected through the wire with fixed wire loop (8), bottom bolt is locked in place in movable conducting ring (7) and the fixed wire loop (8) coaction detects arrangement pipe (9).

6. The fixing bolt processing threading device according to claim 5, wherein a limit switch (19) located below the die holder (11) is fixedly installed on the side wall of the guide rod (2), and the limit switch (19) is located at the lowest descending position of the die holder (11).

7. The fixing bolt processing threading device according to claim 5, wherein the stripper plate (14) is a metal plate and the baffle is made of rubber.

8. The fixing bolt processing threading device according to claim 5, wherein an electric bell (4) for alarming is arranged on the controller (5), the controller (5) is divided into a main circuit and two branch circuits, the two branch circuits are connected in parallel, and the parallel branch circuits are connected in series with the main circuit;

the trunk is formed by connecting a power supply, a protection resistor, a main switch and a limit switch (19) in series;

a branch circuit is connected in series with an electric bell (4) through a delay starting switch;

the other branch circuit is connected in series by a stripper plate (14), a detection rod (13), a fixed wire ring (8), a movable conducting ring (7) and an air pump (3).

9. The fixing bolt processing threading device according to claim 8, wherein the limit switch (19) is a delay off switch, and the limit switch (19) and the delay start switch are simultaneously started, and the start time of the delay start switch is ten to fifteen seconds longer than the close time of the limit switch (19).

10. The fixing bolt working threading device according to claim 8, characterized in that the distance between the movable conducting ring (7) and the fixed conducting ring (8) is the length of the cylindrical side wall of the bolt to be worked.