CN110153693B

CN110153693B - Screwing machine for valve assembly

Info

Publication number: CN110153693B
Application number: CN201910397228.1A
Authority: CN
Inventors: 何国正
Original assignee: Yuhuan Guoda Valve Co ltd
Current assignee: Yuhuan Guoda Valve Co ltd
Priority date: 2019-05-14
Filing date: 2019-05-14
Publication date: 2020-04-28
Anticipated expiration: 2039-05-14
Also published as: CN110153693A

Abstract

The invention discloses a screw twisting machine for valve assembly, which relates to automation equipment and adopts the technical scheme that: the automatic screw positioning device comprises a workbench and a screw feeding mechanism, wherein a sliding frame and a sliding seat are arranged on the workbench, an air cylinder and a working motor are arranged on the sliding seat, a screwdriver is arranged at the output end of the working motor, the automatic screw positioning device also comprises a clamp, the clamp comprises a lower die and an upper die which are rotatably connected, die cavities for positioning workpieces are respectively arranged in the lower die and the upper die, and placing holes are formed in the upper die corresponding to the screw parts of the workpieces; when the upper die is buckled with the lower die, the clamp positions the workpiece through the die cavity. The screw twisting machine for valve assembly has the advantages of accurate valve positioning and simple and convenient clamping, the valve is not easy to shift when the screw is twisted, and the assembled valve has high finished product rate and good firmness; the clamp can automatically realize sequential rotation actions, and the automation degree is high; through setting up gas pocket and trachea, can improve the location steadiness of work piece to can make things convenient for the work piece unloading.

Description

Screwing machine for valve assembly

Technical Field

The invention relates to automation equipment, in particular to a screwing machine for valve assembly.

Background

The existing valve comprises a valve body, a valve core and other components, wherein the valve body is divided into two parts, the valve body is buckled to form a valve whole after the components such as the valve core are assembled in the valve body, and the two parts of the valve body are fixed through screws.

The current chinese utility model patent with the grant publication number of CN203484893U discloses an automatic screw twisting machine, which comprises a fixing frame, a cylinder, a first sliding part, a second sliding part, an electric fixed-torque screwdriver, a screw rod, a clamp, a conduit and a vibration disc. When the automatic screwing machine works, screws to be screwed enter the vibration disc, and enter the inside of the clamp through the guide pipe after being sequenced by the vibration disc. And an air cylinder connected with an external control unit controls the sliding piece and the sliding piece to move in the three-dimensional direction of the X, Y, Z shaft, so that the screw to be screwed is conveyed to a preset position. The jaws of the clamp are then opened and the screw extends from the interior of the clamp to tighten the screw. After the screwing is finished, the screw rod retracts into the clamp, the clamp pliers are closed, and the next cycle of work is started.

The above prior art solutions have the following drawbacks: the valve has more arc surfaces, when the screw screwing machine is used for screwing the screw of the valve, the valve has the problems of difficult positioning and clamping, and the valve is easy to generate position shifting when the screw is screwed.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide the screw twisting machine for valve assembly, which has the advantages of accurate valve positioning and simple and convenient clamping, and the valve is not easy to generate position shifting when the screw is twisted.

The technical purpose of the invention is realized by the following technical scheme: a screw twisting machine for valve assembly comprises a workbench and a screw feeding mechanism, wherein a sliding frame is arranged on the workbench in a sliding manner, a sliding seat is arranged on the sliding frame in a sliding manner, an air cylinder and a working motor driven by the air cylinder to slide are arranged on the sliding seat, a screw driver used for twisting screws is arranged at the output end of the working motor, the screw twisting machine also comprises a clamp arranged on the workbench, the clamp comprises a lower die and an upper die, the lower die is rotatably connected with the upper die, die cavities used for positioning workpieces are respectively arranged in the lower die and the upper die, and placing holes are formed in the upper die corresponding to screw parts of the workpieces; when the upper die is buckled on the lower die, the clamp positions the workpiece through the die cavity, and the axis of the placing hole is vertical.

Through above-mentioned technical scheme, balladeur train and slide can be through removing, the cylinder can be through flexible, make screw feed mechanism, screwdriver realize X, Y, Z triaxial direction's removal. The outlet of the screw feeding mechanism and the screwdriver can be sequentially moved to the accurate position of the clamp where the screw is to be screwed, the screw feeding mechanism outputs the screws one by one to complete automatic feeding of the screws, and then the working motor drives the screwdriver to rotate to complete screwing operation of a valve workpiece.

Because this screw twisting machine clamps the valve work piece through last mould, bed die, the chamber wall shape of die cavity corresponds completely and hugs closely with the work piece, then the location of valve is accurate, twists the difficult drunkenness in-process valve position of screw. The upper die compresses the workpiece tightly through gravity, the workpiece is stable enough in a normal screw screwing process, and the workpiece is not easy to move. The lower die and the upper die which are connected in a rotating mode are convenient to open and close, after a workpiece is placed in the lower die by a person, the workpiece can be clamped by the fastening clamp, and the workpiece is also convenient to clamp.

Preferably, the cavity bottom of the lower die is provided with an air hole in a penetrating manner, and the bottom end of the air hole is connected with an air pipe.

Through above-mentioned technical scheme, the trachea can communicate with external vacuum pump, and then the suction that the vacuum pump produced acts on the gas pocket through the trachea, and this suction is inhaled the work piece on the bed die, can avoid buckling the work piece and produce spontaneous displacement before the upper die to improve the success rate of clamping. The trachea also can communicate with external compressed air source, and when the unloading, compressed air blows off from the gas pocket through the trachea, makes things convenient for work piece and bed die to break away from.

Preferably, the number of the air holes in each die cavity is at least two, and the air holes are positioned on different curved surfaces of the bottom of the die cavity.

Through above-mentioned technical scheme, through setting up a plurality of gas pockets, the suction of a plurality of gas pockets makes placing of work piece more firm, when locating the gas pocket of different curved surfaces and producing suction, can also play the effect of accurate positioning for the work piece, the different curved surfaces of work piece can reliably butt the chamber bottom of die cavity, and the restriction work piece produces the rotation.

Preferably, the air pipe is communicated with an electromagnetic valve, the electromagnetic valve is of a two-inlet one-outlet type, an outlet of the electromagnetic valve is communicated with the air pipe, and two inlets of the electromagnetic valve are used for being respectively communicated with a compressed air source and a vacuum pump.

Through above-mentioned technical scheme, control system can switch the state of solenoid valve to switch the trachea and produce suction or blow, the air current direction of gas pocket can realize automatic switch, and is comparatively convenient.

Preferably, the upper die and the lower die are hinged through a first hinge arranged between the upper die and the lower die, the lower die and the workbench are hinged through a second hinge arranged between the lower die and the workbench, and the first hinge and the second hinge are respectively located on two side walls of the lower die, which deviate from each other.

Through above-mentioned technical scheme, after the screw process was twisted to the work piece completion, the die cavity was opened to the rotatable mould of personnel to order about the bed die and rotate around hinge two, the die cavity slope of this time bed die is outwards, and the personnel of being convenient for carry out the unloading to the work piece.

Preferably, be equipped with driving motor on the workstation, by driving motor drive pivoted driving piece, the driving piece is including being used for the pole that supports that offsets with the bed die diapire, works as when the driving piece rotates, support the pole and can order about the bed die and rotate around two departments of hinge.

Through above-mentioned technical scheme, the driving piece is used for replacing the manual work and rotates the bed die, further improves this automatic level of twisting the screw machine. After the screw process was twisted to the work piece completion, the die cavity was opened to the rotatable mould of personnel, and driving motor ordered about the driving piece and rotated this moment, supported the pole and offset and order about the bed die rotation with the bed die diapire, and the personnel of being convenient for carry out the unloading to the work piece.

Preferably, the driving part is hinged with an elastic sheet, a through hole for the elastic sheet to pass through is formed in the lower die, and the elastic sheet abuts against the upper die through the end part; when the driving piece rotates, the elastic sheet forerunner enables the upper die to rotate around the hinge, and then the abutting rod abuts against the bottom wall of the lower die.

Through the technical scheme, the elastic sheet is located at the position far away from the upper die in advance, the clamp is in a closed state at the moment, and dust is not easily stained in the die cavity. When the driving piece rotates, the elastic sheet abuts against the bottom wall of the upper die through the end part, the elastic sheet drives the upper die to rotate around the hinge, the opening of the clamp is completed, and at the moment, a worker can load a workpiece into the lower die. After the workpiece is loaded, the driving piece reversely rotates, and the elastic piece can pull the upper die to be buckled back to the lower die. After the screwing process is finished, the driving piece is controlled to rotate towards the clamp, and the elastic sheet firstly abuts against the bottom wall of the upper die and opens the clamp; along with the continuation rotation of driving piece, support the diapire of pole butt lower mould then, support the pole and drive the lower mould and rotate around hinge two when the lower mould diapire is gliding. Then the driving piece stops rotating, and a person can conveniently take the workpiece off the inclined lower die. After the workpiece is taken down, the driving piece is controlled to rotate reversely, so that the actions of returning the lower die to the original position and closing the clamp can be sequentially realized, and the feeding of the next batch of workpieces is manually completed in the process.

Preferably, an elastic piece is arranged between the elastic piece and the driving piece, and the elastic force of the elastic piece drives the elastic piece to rotate towards the rotating shaft direction of the driving piece; the spring is arranged between the upper die and the lower die, two ends of the spring are fixed with the upper die and the lower die respectively, and the elastic force of the spring drives the upper die and the lower die to be buckled with each other.

Through the technical scheme, when the upper die is buckled to the lower die, the elastic force of the spring can drive the clamp to be reliably closed, and the stability of the workpiece during clamping is improved. When the abutting rod drives the lower die to rotate around the hinge II, the elastic piece is stretched, the elastic force of the elastic piece acts on the elastic piece, and the elastic piece enables the upper die and the lower die to be kept in an open state, so that the reliability of the action of the clamp is improved.

Preferably, the workbench is provided with a conveyor belt driven by a motor to run, the conveyor belt is close to the second hinge, and the outlet end of the conveyor belt abuts against the outer side wall of the workbench.

Through above-mentioned technical scheme, after the lower mould rotated around hinge two, the die cavity slope of lower mould was towards the conveyer belt side, and personnel can conveniently take out the work piece and place on the conveyer belt this moment, and the conveyer belt is sent the work piece out the workstation automatically and is accomplished the unloading, improves this production efficiency of twisting the screw machine.

In summary, compared with the prior art, the beneficial effects of the invention are as follows:

1. the screw twisting machine for valve assembly has the advantages of accurate valve positioning and simple and convenient clamping, the valve is not easy to shift when the screw is twisted, and the assembled valve has high finished product rate and good firmness;

2. by arranging the driving piece, the clamp can automatically realize sequential rotation actions, and the automation degree is high;

3. through setting up gas pocket and trachea, can improve the location steadiness of work piece to can make things convenient for the work piece unloading.

Drawings

FIG. 1 is a perspective view of a screw driver of the valve assembly of the embodiment;

FIG. 2 is a partial view of the first embodiment, mainly illustrating the structure of the clamp;

FIG. 3 is a partial view of the second embodiment, mainly showing the structure of the air hole, air tube and electromagnetic valve;

FIG. 4 is a cross-sectional view A-A of FIG. 2, illustrating a first operational state of the primary projection driver;

FIG. 5 is a perspective cross-sectional view of the embodiment, primarily highlighting a second operational state of the drive member.

In the figure, 1, a workbench; 10. a screw feeding mechanism; 11. a carriage; 12. a slide base; 121. a cylinder; 122. a working motor; 123. a screwdriver; 2. a clamp; 21. a lower die; 22. an upper die; 23. a first hinge; 24. a second hinge; 20. a mold cavity; 221. placing holes; 211. air holes; 212. an air tube; 213. an electromagnetic valve; 13. a conveyor belt; 3. a drive member; 30. a drive motor; 31. a support rod; 32. a spring plate; 321. an elastic member; 214. a through hole; 25. a spring.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Referring to fig. 1, the screw driving machine for valve assembly disclosed by the invention comprises a workbench 1 and a screw feeding mechanism 10, wherein a sliding frame 11 is slidably arranged on the workbench 1, a sliding seat 12 is slidably arranged on the sliding frame 11, the sliding frame 11 and the sliding seat 12 are respectively driven by a servo motor (not shown in the figure) to move, and the moving direction of the sliding frame 11 is perpendicular to the moving direction of the sliding seat 12. The sliding base 12 is integrally higher than the table top of the workbench 1, an air cylinder 121 and a working motor 122 driven by the air cylinder 121 to slide are arranged on the sliding base 12 along the vertical direction, a screwdriver 123 for screwing screws is coaxially fixed at the output end of the working motor 122, and the end of the screwdriver 123 faces downwards vertically.

The screw feeding mechanism 10 includes conduits for screws to pass through one by one, the conduits are fixed on the slide carriage 12, an outlet of the conduit is located beside the screwdriver 123, the screw feeding mechanism 10 is prior art, and details are not described herein; the table surface of the working table 1 is provided with a clamp 2 for positioning a valve workpiece. The carriage 11 and the slide carriage 12 can move, and the air cylinder 121 can extend and contract, so that the duct outlet of the screw feeding mechanism 10 and the screw driver 123 can move X, Y, Z in three axial directions. The guide pipe outlet of the screw feeding mechanism 10 and the screw driver 123 can be sequentially moved to the accurate position of the to-be-screwed screw on the clamp 2, the screw feeding mechanism 10 outputs the screws one by one to complete automatic feeding of the screws, and then the working motor 122 drives the screw driver 123 to rotate to complete screwing operation of the valve workpiece.

Referring to fig. 2, the fixture 2 includes a lower mold 21 and an upper mold 22, the lower mold 21 and the upper mold 22 are rectangular blocks, the upper mold 22 and the lower mold 21 are hinged by a first hinge 23 disposed therebetween, the lower mold 21 and the workbench 1 are hinged by a second hinge 24 disposed therebetween, and the first hinge 23 and the second hinge 24 are respectively located on two side walls of the lower mold 21 that are away from each other. The end surfaces of the lower die 21 and the upper die 22, which are opposite to each other, are respectively provided with a plurality of die cavities 20 for positioning workpieces, the die cavities 20 are arranged side by side, and a plurality of workpieces can be placed in the clamp 2 at the same time; when the upper die 22 and the lower die 21 are fastened through the end surfaces, the combined space of the die cavity 20 can clamp and accurately position the workpiece.

The upper die 22 is provided with a placing hole 221 corresponding to the screw portion of the workpiece, the placing hole 221 penetrates through the upper die 22, and the hole diameter of the placing hole 221 can be just used for the screw to pass through. When the upper die 22 is buckled with the lower die 21, the clamp 2 positions the workpiece through the die cavity 20, and the axis of the placing hole 221 is along the vertical direction and is opposite to the position of the workpiece to be screwed.

Referring to fig. 2 and 3, the cavity bottom of the cavity 20 of the lower mold 21 is provided with two air holes 211, the number of the air holes 211 in each cavity 20 is two, the two air holes 211 are located on different curved surfaces of the cavity bottom of the cavity 20, one air hole 211 corresponds to a body part of the workpiece, and the other air hole 211 corresponds to a short cylindrical section of the workpiece. The bottom ends of the air holes 211 are connected with air pipes 212. All air pipes 212 are communicated with a single main pipe, the main pipe is communicated with an electromagnetic valve 213, the electromagnetic valve 213 is of a two-inlet one-outlet type, an outlet of the electromagnetic valve 213 is communicated with the main pipe communicated with the air pipes 212, and two inlets of the electromagnetic valve 213 are respectively communicated with a compressed air source and a vacuum pump.

After a workpiece is placed in the lower die 21, a worker can control the electromagnetic valve 213 to act, so that the vacuum pump is communicated with the air pipe 212, the suction force generated by the vacuum pump acts on the air hole 211 through the air pipe 212, the workpiece is sucked on the lower die 21 by the suction force, the workpiece can be prevented from generating spontaneous displacement before being buckled with the upper die 22, and the success rate of clamping is improved. Through setting up two gas holes 211, the suction of two gas holes 211 makes placing of work piece more firm, when locating the gas hole 211 of different curved surfaces and producing suction, can also play the effect of accurate positioning for the work piece, the different curved surfaces of work piece can reliably butt the chamber bottom of die cavity 20, the restriction work piece produces the rotation.

After the screw screwing process of the workpiece is completed, a person or a control system can switch the state of the electromagnetic valve 213 to communicate the compressed air source with the air pipe 212, so that the compressed air is blown out from the air hole 211 through the air pipe 212, and the workpiece is conveniently separated from the lower die 21.

Referring to fig. 1 and 2, the workbench 1 is further provided with a conveyor belt 13 driven by a motor to run, the conveyor belt 13 is close to the second hinge 24, the upper belt surface of the conveyor belt 13 is along the horizontal plane, the upper belt surface of the conveyor belt 13 abuts against the table top of the workbench 1, and the outlet end of the conveyor belt 13 abuts against the outer side wall of the workbench 1. After the work piece finishes the screw twisting process, personnel can rotate upper die 22 to open die cavity 20, and drive lower die 21 around closing page two 24 and rotate, and the die cavity 20 slope of lower die 21 is towards conveyer belt 13 side at this moment, and personnel can conveniently take out the work piece and place on conveyer belt 13 this moment, and conveyer belt 13 sends the work piece out workstation 1 automatically and accomplishes the unloading, and this screw twisting machine's production efficiency is higher.

Referring to fig. 1 and 4, the worktable 1 is further provided with a driving motor 30 and a driving member 3 driven by the driving motor 30 to rotate, and the driving member 3 is used for replacing manual work to operate the clamp 2, so that the automation level of the screw driving machine is further improved. The driving motor 30 is a servo motor capable of rotating forward and backward, the output end of the driving motor 30 is connected with the rotating shaft of the driving part 3 through a speed reducer, the rotating shaft of the driving part 3 axially extends along the length direction of the clamp 2, and the rotating shaft of the driving part 3 is positioned on the table top of the workbench 1 and deviates from the clamp 2. Normally, the driving member 3 is located below the working table 1, and the peripheral wall of the driving member 3 is arc-shaped.

Referring to fig. 4 and 5, the driving member 3 includes a support rod 31 for supporting against the bottom wall of the lower mold 21 and a spring plate 32 for supporting against the bottom wall of the upper mold 22, the spring plate 32 is also arc-shaped, and the spring plate 32 is hinged to the driving member 3 through an end portion; an elastic member 321 is disposed between the elastic sheet 32 and the driving member 3, the elastic member 321 is specifically an elastic rib, and the elastic force of the elastic member 321 drives the elastic sheet 32 to rotate toward the rotating shaft of the driving member 3. The lower die 21 is provided with a through hole 214 for the elastic sheet 32 to pass through, the size of the abutting rod 31 cannot enter the through hole 214, and the elastic sheet 32 abuts against the upper die 22 through the end part. A spring 25 is arranged between the upper die 22 and the lower die 21, two ends of the spring 25 are respectively fixed with the upper die 22 and the lower die 21, the spring 25 is preset with an inward-contracting elastic force, and the elastic force of the spring 25 drives the upper die 22 and the lower die 21 to be buckled with each other.

The working conditions of the screwing machine are as follows: the elastic sheet 32 is located away from the upper mold 22 in advance, and the clamp 2 is in a closed state, so that the mold cavity 20 is not easily contaminated by dust. When the driving member 3 rotates, the elastic sheet 32 abuts against the bottom wall of the upper die 22 through the end portion, the elastic sheet 32 drives the upper die 22 to rotate around the hinge I23, the opening of the clamp 2 is completed, and at the moment, a person can load a workpiece into the lower die 21. After the workpiece is loaded, the driving part 3 rotates reversely, the upper die 22 is buckled back to the lower die 21, the clamp 2 can be driven to be reliably closed by the elastic force of the spring 25, the stability of the workpiece during clamping is improved, and then a screw screwing process can be carried out.

After the screwing process is finished, the driving piece 3 is controlled to rotate towards the direction of the clamp 2, and the elastic sheet 32 firstly abuts against the bottom wall of the upper die 22 and opens the clamp 2; with the continuous rotation of the driving member 3, the abutting rod 31 abuts against the bottom wall of the lower mold 21, the abutting rod 31 drives the lower mold 21 to rotate around the hinge block 24 while sliding on the bottom wall of the lower mold 21, at this time, the elastic member 321 is stretched, and the elastic sheet 32 keeps the upper mold 22 and the lower mold 21 in an open state. The rotation of the driving member 3 is then stopped and the person can easily remove the work piece from the inclined lower die 21. After the workpiece is taken down, the driving piece 3 is controlled to rotate reversely, so that the actions of rotating the lower die 21 back to the original position and closing the clamp 2 can be sequentially realized, and the feeding of the next batch of workpieces is manually finished in the process. The driving motor 30 can automatically run through a programmed program, so that the driving piece 3 can automatically rotate, and the action of the clamp 2 can be automatically completed; the screw twisting machine can realize the action of the clamp 2 through a single driving source, is easy to realize automatic control and reduces the input cost of the driving source.

Because this screw twisting machine carries out the clamping to the valve work piece through upper die 22, bed die 21, and the chamber wall shape of die cavity 20 corresponds completely and hugs closely with the work piece, then the clamping of valve work piece is comparatively firm, and the location of valve is accurate, and the position of twisting screw in-process valve is difficult for the drunkenness. The personnel put into the work piece in lower mould 21, then the clamping of work piece can be accomplished to lock anchor clamps 2, and the clamping of work piece is also comparatively convenient.

The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.

Claims

1. The utility model provides a screw machine that twists of valve assembly, includes workstation (1) and screw feed mechanism (10), it is provided with balladeur train (11) to slide on workstation (1), it is provided with slide carriage (12) to slide on balladeur train (11), be equipped with on slide carriage (12) cylinder (121), by cylinder (121) drive gliding work motor (122), the output of work motor (122) is equipped with screwdriver (123) that are used for twisting the screw, characterized by: the fixture comprises a workbench (1) and is characterized by further comprising a fixture (2) arranged on the workbench (1), wherein the fixture (2) comprises a lower die (21) and an upper die (22), the lower die (21) is rotatably connected with the upper die (22), die cavities (20) for positioning workpieces are respectively arranged in the lower die (21) and the upper die (22), and placing holes (221) are formed in the upper die (22) corresponding to screw parts of the workpieces; when the upper die (22) is buckled with the lower die (21), the clamp (2) positions the workpiece through the die cavity (20), and the axis of the placing hole (221) is vertical;

go up mould (22) and bed die (21) and establish articulatedly through setting up hinge one (23) between the two, bed die (21) and workstation (1) establish articulatedly through setting up hinge two (24) between the two, hinge one (23), hinge two (24) are located the both sides wall department that the bed die (21) deviates from each other respectively.

2. The valve-equipped screwing machine according to claim 1, characterized in that: an air hole (211) is formed in the bottom of the mold cavity (20) of the lower mold (21) in a penetrating mode, and the bottom end of the air hole (211) is connected with an air pipe (212).

3. The valve-equipped screwing machine according to claim 2, characterized in that: the number of the air holes (211) in each die cavity (20) is at least two, and the air holes (211) are positioned on different curved surfaces of the bottom of the die cavity (20).

4. The valve-equipped screwing machine according to claim 3, characterized in that: the air pipe (212) is communicated with an electromagnetic valve (213), the electromagnetic valve (213) is of a two-inlet one-outlet type, an outlet of the electromagnetic valve (213) is communicated with the air pipe (212), and two inlets of the electromagnetic valve (213) are used for being respectively communicated with a compressed air source and a vacuum pump.

5. The valve-equipped screwing machine according to claim 1, characterized in that: be equipped with driving motor (30), by driving motor (30) drive pivoted driving piece (3) on workstation (1), driving piece (3) are including being used for support pole (31) that offsets with bed die (21) diapire, work as when driving piece (3) rotate, support pole (31) can order about bed die (21) around closing two (24) department and rotate.

6. The valve-equipped screwing machine according to claim 5, characterized in that: an elastic sheet (32) is hinged to the driving piece (3), a through hole (214) for the elastic sheet (32) to penetrate through is formed in the lower die (21), and the elastic sheet (32) abuts against the upper die (22) through the end part; when the driving piece (3) rotates, the elastic sheet (32) pioneers to enable the upper die (22) to rotate around the hinge I (23), and then the abutting rod (31) abuts against the bottom wall of the lower die (21).

7. The valve-equipped screwing machine according to claim 6, characterized in that: an elastic piece (321) is arranged between the elastic piece (32) and the driving piece (3), and the elastic force of the elastic piece (321) drives the elastic piece (32) to rotate towards the rotating shaft direction of the driving piece (3); be equipped with spring (25) between last mould (22) and bed die (21), the both ends of spring (25) are fixed with last mould (22), bed die (21) respectively, the elasticity of spring (25) drives mould (22), bed die (21) and buckles each other.

8. The valve-equipped screwing machine according to claim 1, characterized in that: and a conveyor belt (13) driven by a motor to run is arranged on the workbench (1), the conveyor belt (13) is close to the second hinge (24), and the outlet end of the conveyor belt (13) abuts against the outer side wall of the workbench (1).