A fully automatic numerical control spinning machine and a processing method thereof

Abstract

The application provides a full-automatic numerical control spinning machine and a processing method thereof, which comprises a rack, a spindle component and a pipe reversing mechanism. The rack is provided with a spindle mounting seat and a drag plate device. The drag plate device is provided with a spinning roller mounting seat. The spinning roller mounting seat is provided with a spinning roller. The spindle component comprises a spindle and a transmission rod. The spindle is rotationally connected to the spindle mounting seat. One end of the spindle is provided with a clamping taper sleeve. The clamping taper sleeve is provided with a clamping piece mechanism. One end of the clamping piece mechanism is provided with a force transmission push sleeve. One end of the transmission rod is connected to the force transmission push sleeve. The spindle is provided with a clamping driving component. The transmission rod is connected to the clamping driving component. The clamping driving component comprises a motor, a speed reducer, a driving gear, a driven gear, an outer threaded sleeve, an inner threaded sleeve, a transition sleeve and a connecting sleeve. In the application, after the processing of one end of the pipe is completed, the automatic ejection and direction turning of the pipe can be realized through the pipe reversing mechanism and the pipe positioning ejection mechanism, thereby saving time and effort and improving the processing efficiency.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of spinning machines, in particular to a full-automatic numerical control spinning machine and a processing method thereof. BACKGROUND

[0002] An existing pipe product has a structure as shown in the figure. Figure 1 The two ends of the pipe 30 need to be respectively processed by a spinning machine to form a necking structure at the two ends of the pipe 30.

[0003] When the conventional spinning processing equipment processes the pipe 30, the pipe is first clamped to the clamping device at one end of the main shaft, the pipe is clamped by the clamping device, then the main shaft rotates to drive the pipe to rotate synchronously, and the spinning roller is fed to spin the one end of the pipe; after one end of the pipe is processed, the pipe needs to be manually taken off, the pipe is turned 180 degrees and clamped to the clamping device again, and then the other end of the pipe is processed by the same method to form a necking structure at the two ends of the pipe, thereby obtaining the required pipe product.

[0004] However, the existing spinning processing equipment has the following disadvantages:

[0005] 1. Since both ends of the pipe need to be processed by spinning, after one end of the pipe is processed by spinning, the pipe needs to be manually taken off from the clamping device, turned 180 degrees and clamped to the clamping device again, and then the other end of the pipe is processed by spinning until the entire pipe is processed; since the above process needs to be manually operated, it is troublesome to operate and the processing efficiency is low.

[0006] 2. When the pipe 30 is thin-walled, after the pipe 30 is clamped and processed once, the pipe is turned over and clamped again. Since the pipe wall is thin, the outer diameter of the pipe changes after being clamped once due to the clamping force. Therefore, the opening degree and clamping force of the clamping device need to be finely adjusted and controlled when clamping again to adapt to the change of the outer diameter of the pipe. However, in the conventional spinning processing equipment, the clamping action of the clamping device is driven by the clamping cylinder arranged at one end of the main shaft. The clamping cylinder is connected to the clamping device through a transmission rod, and the clamping cylinder drives the transmission rod to move to control the clamping or release of the clamping device. However, the clamping force and opening degree of the clamping device are difficult to accurately adjust and control by the clamping cylinder, and cannot adapt to the change of the outer diameter of the pipe after being clamped once, so that reliable clamping cannot be achieved. SUMMARY

[0007] The present application aims to solve the problems in the prior art and provide a full-automatic numerical control spinning machine and a processing method thereof.

[0008] The object of the present application is achieved by the technical scheme that a full-automatic numerical control spinning machine comprises a rack, a spindle component and a pipe reversing mechanism, the rack is provided with a spindle mounting seat and a drag plate device, the drag plate device is provided with a spinning roller mounting seat, and the spinning roller mounting seat is provided with a spinning roller.

[0009] The spindle component comprises a spindle and a transmission rod, the spindle is of a hollow structure, the spindle is rotationally connected to the spindle mounting seat, one end of the spindle is provided with a clamping taper sleeve, the inner wall of the clamping taper sleeve is a conical surface, the clamping taper sleeve is provided with a clamping segment mechanism, and one end of the clamping segment mechanism is provided with a force transmission push sleeve; the transmission rod is arranged in the spindle, one end of the transmission rod close to the clamping taper sleeve is connected to the force transmission push sleeve; the spindle is provided with a clamping driving component, and the transmission rod is connected to the clamping driving component.

[0010] The clamping driving component comprises a motor, a speed reducer, a driving gear, a driven gear, an outer threaded sleeve, an inner threaded sleeve, a transition sleeve, a connecting sleeve and a mounting seat, the mounting seat is fixedly arranged on the rack, the transition sleeve is rotationally connected to the outside of the spindle, and the transition sleeve is fixedly connected to the mounting seat; the connecting sleeve is in sliding fit with the spindle through a sliding key mechanism, and the transmission rod is connected to the connecting sleeve; the outer threaded sleeve is rotationally connected to the outside of the connecting sleeve, and the inner threaded sleeve is rotationally connected to the outside of the transition sleeve; the outer threaded sleeve is provided with a guide groove, the guide groove is arranged along the axial direction of the spindle, the transition sleeve is provided with a guide boss, and the guide boss is in sliding fit with the guide groove; the outer threaded sleeve is in threaded fit with the inner threaded sleeve; the driven gear is connected to the inner threaded sleeve, the output shaft of the motor is connected to the input shaft of the speed reducer, and the driving gear is connected to the output shaft of the speed reducer; the driving gear is in mesh with the driven gear; and the spindle component further comprises a pipe positioning and ejection mechanism.

[0011] The pipe reversing mechanism is used for reversing the clamping direction of the pipe.

[0012] Preferably, the pipe positioning and ejection mechanism comprises a first fixing frame arranged on the spindle mounting seat and a positioning and ejecting rod, the first fixing frame is provided with a discharging cylinder, a connecting plate is arranged on the piston rod of the discharging cylinder, one end of the positioning and ejecting rod is connected to the connecting plate, and the other end of the positioning and ejecting rod extends into the spindle and is provided with a positioning member.

[0013] Preferably, the clamping segment mechanism comprises a plurality of clamping segments and spring supporting rings, the clamping segments are arranged in a circular array in the clamping taper sleeve, the clamping segments are provided with guide surfaces, and the guide surfaces are in contact with the inner wall of the clamping taper sleeve; and each clamping segment is arranged on the outside of a spring supporting ring.

[0014] As preferred, the pipe reversing mechanism comprises a second fixed frame, a lifting frame, the second fixed frame being provided with a lifting cylinder connected with the lifting frame; the lifting frame is provided with a rotating drive member, the rotating drive member being connected with a pipe rotating supporting plate; the lifting frame is provided with a pushing cylinder, the pushing cylinder being located at one end of the pipe rotating supporting plate away from the clamping cone sleeve, the pushing cylinder being connected with a push plate.

[0015] As preferred, the lifting frame is provided with a guide rod, the second fixed frame being provided with a guide sleeve, the guide rod being in sliding cooperation with the guide sleeve.

[0016] As preferred, the rotating drive member is a rotating cylinder.

[0017] As preferred, the motor is a servo motor.

[0018] As preferred, the main shaft is connected with the main shaft mounting seat through a main shaft bearing.

[0019] A processing method of a full-automatic numerical control spinning machine, comprising the following specific steps:

[0020] The pipe is placed in the clamping segment mechanism, the motor drives the driving gear to rotate, the driving gear drives the driven gear and the internal thread sleeve to rotate synchronously, the external thread sleeve and the connecting sleeve are moved along the axial direction of the main shaft through the thread cooperation between the internal thread sleeve and the external thread sleeve, the connecting sleeve drives the transmission rod and the force transmission push sleeve to move towards the clamping cone sleeve, thereby pushing the clamping segment mechanism to move in the clamping cone sleeve; when the clamping segment mechanism moves, each clamping segment on the clamping segment mechanism clamps the pipe under the action of the inner wall of the clamping cone sleeve;

[0021] Then the main shaft rotates to drive the pipe to rotate; at the same time, the drag plate device moves the spinning roller to the port of the pipe, and the pipe is spinning processed at one end through the rotation of the pipe itself and the feeding movement of the spinning roller;

[0022] After the one end of the pipe is processed, the lifting cylinder drives the pipe reversing supporting plate to move to a position corresponding to the pipe; the motor drives the transmission rod to reset, the clamping segments are opened under the action of the spring supporting ring and the pipe is loosened; the unloading cylinder drives the positioning jacks to move, the pipe is jacked out of the clamping segment mechanism through the positioning jacks, and the positioning jacks are reset after the pipe is jacked out; the jacked-out pipe falls onto the pipe reversing supporting plate, and then the pipe reversing supporting plate is horizontally adjusted by 180° under the drive of the reversing drive member, after the adjustment is completed, the pipe on the pipe reversing supporting plate is jacked into the clamping segment mechanism through the pushing cylinder until the one end of the pipe abuts against the positioning member;

[0023] Then the pipe is clamped again through the clamping segment mechanism, and the other end of the pipe is spinning processed in the same way; after the other end of the pipe is also spinning processed, the pipe is loosened by the clamping segment mechanism, and the pipe is jacked out by the positioning jacks, thereby completing the unloading.

[0024] The beneficial effects of the present application are: 1. In the present application, after the machining of one end of the pipe fitting is completed, the automatic ejection and direction turning of the pipe fitting can be realized through the pipe fitting reversing mechanism and the pipe fitting positioning ejection mechanism. No manual operation is required in this process, which saves time and effort and improves the machining efficiency. 2. The pipe fitting is clamped by the motor-driven clamping mechanism. The rotation and output torque of the motor can be accurately controlled, so that the clamping opening and closing degree and the clamping force can be flexibly and accurately controlled and adjusted, and reliable clamping effect can be realized. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of an existing pipe fitting product.

[0026] Figure 2 It is a structural schematic diagram of one direction of the present application.

[0027] Figure 3 It is a structural schematic diagram of another direction of the present application.

[0028] Figure 4 It is a side view of the present application.

[0029] Figure 5 It is Figure 2 An enlarged view of A part in the figure.

[0030] Figure 6 It is a structural schematic diagram of the main shaft part.

[0031] Figure 7 It is a side view of the main shaft part.

[0032] Figure 8 It is a sectional view of the main shaft part.

[0033] Figure 9 It is Figure 8 An enlarged view of B part in the figure.

[0034] Figure 10 It is a structural schematic diagram of the clamping driving part.

[0035] Figure 11 It is a sectional view of the clamping driving part.

[0036] Figure 12 It is a structural schematic diagram of the external thread sleeve and the transition sleeve.

[0037] In the figure: 1, body, 2, main shaft mounting seat, 3, drag plate device, 4, motor, 5, speed reducer, 6, positioning top rod, 7, unloading cylinder, 8, second fixing frame, 10, spinning roller mounting seat, 11, lifting cylinder, 12, spinning roller, 13, oil pipe, 14, main shaft, 15, pulley, 16, first fixing frame, 17, lifting frame, 18, steering driving piece, 19, pipe steering support plate, 20, push cylinder, 21, push plate, 22, guide rod, 23, guide sleeve, 25, first fixing frame, 26, connecting plate, 27, clamping cone sleeve, 28, clamping piece, 30, pipe, 31, mounting seat, 32, driving gear, 33, driven gear, 34, external thread sleeve, 35, internal thread sleeve, 36, main shaft bearing, 37, transmission rod, 38, transmission push sleeve, 39, positioning piece, 40, spring support ring, 41, transition sleeve, 42, guide groove, 43, connecting sleeve, 44, slide key, 45, keyway, 46, first bearing, 47, second bearing, 48, third bearing, 49, guide surface, 50, guide boss. DETAILED DESCRIPTION

[0038] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. All other embodiments obtained by those skilled in the art based on the embodiments in the present application belong to the scope of protection of the present application.

[0039] Those skilled in the art should understand that in the disclosure of the present application, the orientations or positional relationships indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like are based on the orientations or positional relationships shown in the drawings, which are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore the above terms cannot be understood as a limitation on the present application.

[0040] It can be understood that the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of one element can be one, and in another embodiment, the number of the element can be multiple, and the term "one" cannot be understood as a limitation on the number.

[0041] As Figures 2 to 12As shown, a full-automatic numerical control spinning machine comprises a frame 1, a main shaft component, a pipe reversing mechanism, the frame 1 is provided with a main shaft mounting seat 2 and a drag plate device 3, the drag plate device 3 is provided with a spinning roller mounting seat 10, the spinning roller mounting seat 10 is provided with a spinning roller 12, the spinning roller 12 is rotationally connected to the spinning roller mounting seat 10. Among them, the drag plate device 3 is prior art, the drag plate device 3 adopts a servo driving mode, and can drive the spinning roller 12 to move along three axes of X axis, Y axis and Z axis. In order to realize cooling in the spinning process, the spinning roller mounting seat 10 is provided with an oil pipe 13, the oil pipe 13 is connected to a cooling oil pump, and an oil injection port of the oil pipe 13 is opposite to the spinning roller 12; when the end of the pipe 30 is processed by the spinning roller 12, the spinning roller is sprayed by the oil pipe 13, and the processing position is cooled and lubricated.

[0042] The main shaft component comprises a main shaft 14 and a transmission rod 37, the main shaft 14 is a hollow structure, the main shaft 14 is rotationally connected to the main shaft mounting seat 2, and the main shaft 14 is connected to the main shaft mounting seat 2 through a main shaft bearing 36. The main shaft 14 is provided with a belt pulley 15, the belt pulley 15 is connected to a main shaft driving motor through a belt transmission mechanism, and the main shaft 14 is driven to rotate by the main shaft driving motor.

[0043] One end of the main shaft 14 is provided with a clamping taper sleeve 27, the inner wall of the clamping taper sleeve 27 is a conical surface, and the clamping taper sleeve 27 is provided with a clamping segment mechanism. Among them, the clamping segment mechanism comprises a plurality of clamping segments 28 and spring supporting rings 40, the clamping segments 28 are arranged in the clamping taper sleeve 27 in a circular array, the clamping segments 28 are provided with guide surfaces 49, and the guide surfaces 49 are in contact with the inner wall of the clamping taper sleeve 27. Each clamping segment 28 is arranged on the outer side of the spring supporting ring 40. The inner side of the clamping segment 28 is provided with a positioning groove for accommodating the spring supporting ring 40, and the spring supporting ring 40 is embedded in the positioning groove. The spring supporting ring 40 provides the clamping segment 28 with an outward expanding force. When the clamping segment mechanism moves towards the end of the clamping taper sleeve 27 with a smaller diameter, each clamping segment 28 is inwardly closed, so that the pipe 30 is clamped.

[0044] One end of the clamping segment mechanism is provided with a force transmission push sleeve 38; the transmission rod 37 is arranged in the main shaft 14, and one end of the transmission rod 37 close to the clamping taper sleeve 27 is connected to the force transmission push sleeve 38. The main shaft 14 is provided with a clamping driving component, the transmission rod 37 is connected to the clamping driving component. The transmission rod 37 is a hollow structure.

[0045] The clamping driving component comprises a motor 4, a speed reducer 5, a driving gear 32, a driven gear 33, an outer threaded sleeve 34, an inner threaded sleeve 35, a transition sleeve 41, a connecting sleeve 43 and a mounting seat 31. The mounting seat 31 is fixedly arranged on the frame 1, the transition sleeve 41 is rotationally connected to the outer side of the main shaft 14, the second bearing 47 is arranged between the transition sleeve 41 and the main shaft 14, and the transition sleeve 41 is fixedly connected to the mounting seat 31.

[0046] The connecting sleeve 43 is in sliding fit with the main shaft 14 through a sliding key mechanism, and the connecting sleeve 43 can move along the axial direction of the main shaft 14, but the connecting sleeve 43 cannot rotate around the main shaft 14. The sliding key mechanism comprises a sliding key 44 arranged on the outer ring surface of the main shaft 14 and a key groove 45 arranged on the inner wall of the connecting sleeve 43, the key groove 45 is arranged along the axial direction of the main shaft 14, and the sliding key 44 is connected in the key groove 45.

[0047] The transmission rod 37 is connected with the connecting sleeve 43. The outer threaded sleeve 34 is rotationally connected to the outer side of the connecting sleeve 43, and the first bearing 46 is arranged between the outer threaded sleeve 34 and the connecting sleeve 43, so that the outer threaded sleeve 34 can rotate on the outer side of the connecting sleeve 43. The inner threaded sleeve 35 is rotationally connected to the outer side of the transition sleeve 41, and the third bearing 48 is arranged between the inner threaded sleeve 35 and the transition sleeve 41, so that the inner threaded sleeve 35 can rotate on the outer side of the transition sleeve 41. The outer ring surface of the outer threaded sleeve 34 is provided with external threads, and the inner ring surface of the inner threaded sleeve 35 is provided with internal threads, and the outer threaded sleeve 34 is in threaded fit with the inner threaded sleeve 35.

[0048] The outer threaded sleeve 34 is provided with a guide groove 42 arranged along the axial direction of the main shaft 14, and the transition sleeve 41 is provided with a guide boss 50 in sliding fit with the guide groove 42. Since the transition sleeve 41 is fixedly connected to the mounting seat 31, the outer threaded sleeve 34 can only move along the axial direction of the main shaft 14 and cannot rotate.

[0049] The driven gear 33 is connected with the inner threaded sleeve 35, and the driven gear 33 is fixedly connected to one end of the inner threaded sleeve 35. The output shaft of the motor 4 is connected with the input shaft of the speed reducer 5, and the driving gear 32 is connected to the output shaft of the speed reducer 5. The driving gear 32 is in meshing fit with the driven gear 33. In the present application, the motor 4 is a servo motor. The servo motor is connected with a motor controller, and the rotation of the servo motor and the output torque of the servo motor are accurately controlled through the motor controller.

[0050] The main shaft component further comprises a pipe positioning and ejection mechanism. The pipe positioning and ejection mechanism comprises a first fixing frame 25 arranged on the main shaft mounting seat 2, a positioning and ejecting rod 6, the first fixing frame 25 is provided with a discharging air cylinder 7, a connecting plate 26 is arranged on the piston rod of the discharging air cylinder 7, one end of the positioning and ejecting rod 6 is connected with the connecting plate 26, the other end of the positioning and ejecting rod 6 extends into the main shaft 14 and is provided with a positioning piece 39, and the positioning piece 39 is arranged at a position close to the clamping mechanism; the positioning and ejecting rod 6 and the positioning piece 39 are driven to move in the main shaft 14 through the discharging air cylinder 7.

[0051] The pipe reversing mechanism is used for reversing the clamping direction of the pipe 30. The pipe reversing mechanism comprises a second fixing frame 8 and a lifting frame 17, and the second fixing frame 8 is fixedly arranged on the main shaft mounting seat 2. The second fixing frame 8 is provided with a lifting cylinder 11, and the lifting cylinder 11 is connected with the lifting frame 17. The lifting frame 17 is provided with a reversing driving member 18, and the reversing driving member 18 is arranged at the lower end of the lifting frame 17. The reversing driving member 18 is connected with a pipe reversing supporting plate 19. The lifting frame 17 is provided with a pushing cylinder 20, and the pushing cylinder 20 is arranged at the end of the pipe reversing supporting plate 19 away from the clamping cone sleeve 27. The pushing cylinder 20 is connected with a pushing plate 21. The lifting frame 17 is provided with a guide rod 22, and the guide rod 22 is arranged at the upper end of the lifting frame 17. The second fixing frame 8 is provided with a guide sleeve 23 corresponding to the guide rod 22, and the guide rod 22 and the guide sleeve 23 are in sliding fit. In the present application, the rotating driving member 18 is a rotating cylinder.

[0052] When the pipe 30 is subjected to spinning processing, the following specific steps are included:

[0053] The pipe is placed in the clamping segment mechanism. The motor drives the driving gear to rotate, the driving gear drives the driven gear and the internal thread sleeve to rotate synchronously, the external thread sleeve and the connecting sleeve are moved along the main shaft axial direction through the thread cooperation between the internal thread sleeve and the external thread sleeve, the connecting sleeve drives the transmission rod and the force transmission pushing sleeve to move towards the clamping cone sleeve, thereby pushing the clamping segment mechanism to move in the clamping cone sleeve. When the clamping segment mechanism moves, each clamping segment on the clamping segment mechanism clamps the pipe under the action of the inner wall of the clamping cone sleeve.

[0054] Then the main shaft rotates to drive the pipe to rotate. At the same time, the dragging plate device moves the spinning roller to the port of the pipe, and the pipe is subjected to spinning processing through the rotation of the pipe itself and the feeding movement of the spinning roller.

[0055] After the one end of the pipe is processed, the lifting cylinder drives the pipe reversing supporting plate to move to the position corresponding to the pipe. The motor drives the transmission rod to reset, and the clamping segment is opened under the action of the spring supporting ring and releases the pipe. The unloading cylinder drives the positioning jack to move, and the pipe is pushed out of the clamping segment mechanism through the positioning jack. After the pipe is pushed out, the positioning jack is reset. The pipe after being pushed out falls on the pipe reversing supporting plate, and then the pipe reversing supporting plate is horizontally adjusted by 180° under the drive of the reversing driving member. After the adjustment is completed, the pipe on the pipe reversing supporting plate is pushed into the clamping segment mechanism through the pushing cylinder until the one end of the pipe abuts against the positioning member.

[0056] Then the pipe is clamped by the clamping segment mechanism again, and the other end of the pipe is subjected to spinning processing in the same way. When the other end of the pipe is also subjected to spinning processing, the clamping segment mechanism releases the pipe, and the positioning jack pushes out the pipe, thereby completing the discharging.

[0057] Compared with the traditional spinning processing equipment, the application has the following advantages:

[0058] 1、In the application, after the processing of one end of the pipe is completed, the automatic ejection and direction turning of the pipe can be realized through the pipe reversing mechanism and the pipe positioning ejection mechanism, without manual operation, saving time and effort, and improving the processing efficiency.

[0059] 2、The pipe is clamped by the motor-driven clamping mechanism, the rotation and output torque of the motor can be accurately controlled, so that the clamping opening and closing degree and the clamping force can be flexibly and accurately controlled and adjusted, and reliable clamping effect is realized; and the output torque adjustment of the motor is relatively easy to realize, which can be realized through the torque control unit on the motor controller.

[0060] The application is not limited to the above-mentioned best embodiment, and anyone can derive other various forms of products under the inspiration of the application, but regardless of any changes in shape or structure, any technical solution with the same or similar technical solution as the application falls within the protection scope of the application.

Claims

1. A fully automatic numerical control spinning machine, characterized in that, The spinning roller is arranged on the spinning roller mounting seat. The main shaft part comprises a main shaft and a transmission rod. The main shaft is a hollow structure, and one end of the main shaft is provided with a clamping taper sleeve. The inner wall of the clamping taper sleeve is a conical surface.

2. A fully automatic numerically controlled spinning machine according to claim 1, characterized in that, The clamping taper sleeve is provided with a clamping piece mechanism.

3. A fully automatic numerical control spinning machine according to claim 1, characterized in that, The transmission rod is arranged in the main shaft.

4. A fully automatic numerical control spinning machine according to claim 1, characterized in that, The transmission rod is connected with the transmission rod.

5. A fully automatic numerical control spinning machine according to claim 1, characterized in that, The clamping drive part is connected with the transmission rod.

6. A method of processing based on the fully automatic numerical control spinning machine according to any one of claims 1 to 5, characterized in that, The clamping piece mechanism comprises a plurality of clamping pieces and spring supporting rings. The clamping pieces are arranged in the clamping taper sleeve in a circular array. The clamping piece is provided with a guide surface. The guide surface is in contact with the inner wall of the clamping taper sleeve. Each clamping piece is arranged on the outer side of the spring supporting ring. The clamping drive part comprises a motor, a speed reducer, a driving gear, a driven gear, an outer threaded sleeve, an inner threaded sleeve, a transition sleeve, a connecting sleeve and a mounting seat. The mounting seat is fixedly arranged on the rack. The transition sleeve is rotatably connected to the outer side of the main shaft. The transition sleeve is fixedly connected with the mounting seat. The connecting sleeve is slidably connected with the main shaft through a sliding key mechanism. The transmission rod is connected with the connecting sleeve. The outer threaded sleeve is rotatably connected to the outer side of the connecting sleeve. The inner threaded sleeve is rotatably connected to the outer side of the transition sleeve. The outer threaded sleeve is provided with a guide groove. The guide groove is arranged along the axial direction of the main shaft. The transition sleeve is provided with a guide boss. The guide boss is slidably connected with the guide groove. The outer threaded sleeve is threadedly connected with the inner threaded sleeve. The driven gear is connected with the inner threaded sleeve. The output shaft of the motor is connected with the input shaft of the speed reducer. The driving gear is connected with the output shaft of the speed reducer. The main shaft part further comprises a pipe positioning and ejecting mechanism. The pipe positioning and ejecting mechanism comprises a first fixed frame arranged on the main shaft mounting seat and a positioning ejecting rod. The first fixed frame is provided with a discharging air cylinder. The piston rod of the discharging air cylinder is provided with a connecting plate. One end of the positioning ejecting rod is connected with the connecting plate. The other end of the positioning ejecting rod extends into the main shaft and is provided with a positioning piece. The pipe reversing mechanism is used for reversing the clamping direction of the pipe. The pipe reversing mechanism comprises a second fixed frame and a lifting frame. The second fixed frame is provided with a lifting air cylinder. The lifting air cylinder is connected with the lifting frame. The lifting frame is provided with a reversing drive part. The reversing drive part is connected with a pipe reversing supporting plate. The lifting frame is provided with a guide rod. The second fixed frame is provided with a guide sleeve. The guide rod is slidably connected with the guide sleeve. The reversing drive part is a rotary air cylinder. The motor is a servo motor. The main shaft is connected with the main shaft mounting seat through a main shaft bearing. The method comprises the following specific steps. The pipe is placed in the clamping segment mechanism, the motor drives the driving gear to rotate, the driving gear drives the driven gear and the inner threaded sleeve to rotate synchronously, the outer threaded sleeve and the connecting sleeve move axially along the main shaft through the thread cooperation between the inner threaded sleeve and the outer threaded sleeve, the connecting sleeve drives the transmission rod and the force transmission push sleeve to move towards the clamping cone sleeve, thereby pushing the clamping segment mechanism to move in the clamping cone sleeve; when the clamping segment mechanism moves, each clamping segment on the clamping segment mechanism clamps the pipe under the action of the inner wall of the clamping cone sleeve; Then the main shaft rotates to drive the pipe to rotate; at the same time, the drag plate device moves the spinning roller to the port of the pipe, and the spinning roller feeds the pipe through the rotation of the pipe and the spinning roller to perform spinning processing on one end of the pipe; After the processing of one end of the pipe is completed, the lifting cylinder drives the pipe reversing support plate to move to a position corresponding to the pipe; the motor drives the transmission rod to reset, the clamping segments are opened under the action of the spring supporting ring and the pipe is loosened; the unloading cylinder drives the positioning jack to move, the pipe is pushed out of the clamping segment mechanism through the positioning jack, and the positioning jack is reset after the pipe is pushed out; the pipe after being pushed out falls on the pipe reversing support plate, then the pipe reversing support plate is horizontally adjusted by 180° under the drive of the reversing drive, and after the adjustment is completed, the pipe on the pipe reversing support plate is pushed into the clamping segment mechanism through the push cylinder until one end of the pipe abuts against the positioning member; Then the pipe is clamped again through the clamping segment mechanism, and the other end of the pipe is processed in the same way; when the other end of the pipe is also processed, the clamping segment mechanism loosens the pipe, and the positioning jack pushes out the pipe, thereby completing the blanking.

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