Machining equipment for production of anti-deformation welded pipe
By designing clamping mechanisms and lifting mechanisms in welded pipe processing equipment, the deformation and bending problems of pipe materials during the cutting process are solved, cutting accuracy and working efficiency are improved, and resource waste is reduced.
Patent Information
- Application Number
- CN202420742930.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-11
- Publication Date
- 2025-02-11
- Estimated Expiration
- 2034-04-11
AI Technical Summary
When cutting pipe materials with anti-deformation welding pipes, the cutting wheel can easily cause the pipe materials to deform, and the bottom plate lacks the lifting function. When using other clamping mechanisms, the pipe materials are easily bent, resulting in insufficient cutting size. Waste of resources.
A processing equipment for the production of deformation-resistant welded pipes including a clamping mechanism and a lifting mechanism is designed. The clamping mechanism realizes stable clamping of pipe materials through hydraulic cylinders and connecting rod systems. The lifting mechanism enables the bottom plate to be lifted and lowered through the motor and gear systems to ensure stable bottoming of pipe materials during the cutting process.
Through the design of the clamping mechanism, the deformation of the pipe material during the cutting process is reduced. Through the design of the lifting mechanism, the bend of the pipe material is avoided, the cutting accuracy is improved, and resource waste is reduced.
Smart Images
Figure CN222448522U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of processing equipment for producing anti-deformation welded pipes, in particular to processing equipment for producing anti-deformation welded pipes. Background Art
[0002] The welded pipe cutting machine is a tool used to shear welded pipes. It is mainly used for cutting welded pipes in projects such as house construction and drainage systems.
[0003] For example, a processing device for welded pipe production with the authorization announcement number "CN210677099U" is provided with multiple clamping blocks. When cutting the welded pipe, the clamping blocks can be prevented from being offset to ensure the normal operation of the device. An anti-skid pad is provided on one side of the clamping block to increase the friction between the welded pipe and the welded pipe, and the surface of the welded pipe is protected from being scratched. A support plate and a stepper motor are provided to ensure the cutting quality and avoid waste of resources. A ball bearing is provided to facilitate the movement of the moving plate. However, when the processing device for welded pipe production cuts the pipe material, the cutting wheel always presses on one side of the pipe material for cutting, which easily causes the pipe material to deform. Other equipment is required to restore the pipe material before the cut pipe material can be used again, which increases the working time and reduces the working efficiency. In addition, the bottom plate of the device does not have a lifting function. When other clamping mechanisms are replaced, the pipe material cannot be supported, which causes the pipe material to be easily bent, resulting in errors in subsequent cutting work, and the cutting size is not accurate enough, resulting in the scrapping of the pipe material and waste of resources. Utility Model Content
[0004] The utility model aims to solve the problems that the cutting wheel of the existing anti-deformation welded pipe production processing equipment easily causes the pipe to deform when cutting the pipe, and the bottom plate does not have a lifting function. When other clamping mechanisms are used, the pipe is easily bent, the cutting size is not accurate enough, and the pipe is scrapped, resulting in a waste of resources. A kind of anti-deformation welded pipe production processing equipment is proposed to solve the problems that the cutting wheel of the existing anti-deformation welded pipe production processing equipment easily causes the pipe to deform when cutting the pipe, and the bottom plate does not have a lifting function. When other clamping mechanisms are used, the pipe is easily bent, and the cutting size is not accurate enough, resulting in a waste of resources.
[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:
[0006] A processing equipment for producing anti-deformation welded pipes is designed, including a casing, a first motor and a base. A clamping mechanism is provided on the surface of the base, and the clamping mechanism includes a second hydraulic cylinder and a clamping box. The surface of the clamping box is fixedly connected to the surface of the base, the inner surface of the clamping box is fixedly connected to the second hydraulic cylinder, the telescopic end of the second hydraulic cylinder is fixedly connected to one end of a transmission column, the transmission column is movably connected to one end of two groups of first connecting rods through a pin shaft, the other end of the first connecting rod is movably connected to one end of the second connecting rod through a pin shaft, the other end of the second connecting rod is slidably connected to the protruding part of one end of a third connecting rod through a provided slideway, the surface of the third connecting rod is movably connected to the clamping box through a pin shaft, and the other end of the third connecting rod and the other end of the transmission column are provided with rollers.
[0007] Preferably, the inner surface of the casing is fixedly connected to the surface of the clamping box, the inner surface of the casing is fixedly connected to the surface of the base, the base is slidably connected to the lifting frame through an opening on the surface, and one end of the lifting frame is fixedly connected to the surface of the bottom plate.
[0008] Preferably, the inner surface of the base is provided with a lifting mechanism, and the lifting mechanism includes a fourth motor and a fourth motor box, the surface of the fourth motor box is fixedly connected to the inner surface of the base, the fourth motor box is fixedly connected to the fourth motor through a bracket, the output shaft of the fourth motor passes through the fourth motor box and is fixedly connected to the first bevel gear through a reduction gear box, the first bevel gear is meshed with the second bevel gear, the second bevel gear is rotatably connected to the inner surface of the base through the cooperation of a pin shaft and a bearing, the second bevel gear is movably connected to the worm through the cooperation of a pin shaft and a chain, the worm gear is meshed with two sets of worm gears, the worm gear is movably connected to the base through the cooperation of the pin shaft and the protruding part of the inner surface of the base, the worm gear is fixedly connected to one end of the fourth connecting rod through the pin shaft, the other end of the fourth connecting rod is movably connected to one end of the fifth connecting rod, one end of the fifth connecting rod is movably connected to the surface of the sliding block through the pin shaft, and the sliding block is slidably connected to the surface of the lifting frame through an opening provided on the surface.
[0009] Preferably, two groups of L-shaped frames are provided on the surface of the casing, and the L-shaped frames are slidably connected to two groups of cabinet doors via slideways provided on the surface, and observation windows are provided on the surfaces of the cabinet doors, and handles are provided on the surfaces of the cabinet doors.
[0010] Preferably, the first motor is fixedly connected to the first motor box through a bracket, the output shaft of the first motor passes through the first motor box, the output shaft of the first motor passes through the casing and is rotatably connected to a group of chains through a reduction box, the protruding part of the chain is slidably engaged with the sliding frame through a slide provided on the surface of the sliding frame, the sliding frame is slidably engaged with the inner surface of the casing through a slide provided on the inner surface of the casing, the surface of the sliding frame is fixedly connected to the surface of the first hydraulic box, the first hydraulic box is fixedly connected to the first hydraulic cylinder through the bracket, the telescopic end of the first hydraulic cylinder passes through the first hydraulic box and is fixedly connected to the surface of the saw disc frame, the surface of the saw disc frame is fixedly connected to the surface of the third motor box, the third motor is fixedly connected to the third motor box through the bracket, the output shaft of the third motor passes through the third motor box and the saw disc frame and is rotatably connected to the saw disc through a chain, and the saw disc is rotatably connected to the saw disc frame through the cooperation of a pin and a bearing.
[0011] Preferably, the protruding portion provided on the inner surface of the casing is fixedly connected to the surface of the second motor box and a group of reduction boxes through support columns, the second motor box is fixedly connected to the second motor through a bracket, the output shaft of the second motor passes through the second motor box and is fixedly connected to the surface of the three-jaw chuck through the reduction box, the three-jaw chuck is threadedly connected to three groups of knobs through threaded holes provided on the surface, one end of the knob is rotatably clamped to the surface of the clamping block through a groove provided on the surface of the clamping block, and the surface of the clamping block is provided with an anti-slip pad.
[0012] The utility model provides a processing equipment for producing anti-deformation welded pipes, which has the beneficial effects of: through the cooperation of the clamping mechanism and the three-jaw chuck, the telescopic end of the second hydraulic cylinder drives the transmission column to rise, the transmission column pushes the second connecting rod to slide outward through the first connecting rod, the second connecting rod drives one end of the third connecting rod to rotate upward, and the other end of the third connecting rod to rotate downward, so that the three groups of rollers are close to each other to complete the clamping work on the surface of the pipe material, the output shaft of the second motor drives the three-jaw chuck to rotate through the reduction box, and the three-jaw chuck drives the pipe material to rotate, so that the pipe material can automatically rotate when the cutting work is in progress, and the pipe material will not be always subjected to force at the same place during cutting, which reduces the deformation of the pipe material, reduces the need for secondary processing of the pipe material, reduces the working time of the device, and improves the working efficiency of the device.
[0013] Through the cooperation of the lifting mechanism and the base plate, the output shaft of the fourth motor drives the first bevel gear to rotate through the reduction box, the first bevel gear drives the second bevel gear to rotate, the second bevel gear drives the worm to rotate through the chain, the worm drives the two sets of worm gears to rotate relative to each other, the two sets of worm gears drive the two sets of fourth connecting rods to rotate upward, the two sets of fourth connecting rods drive one end of the two sets of fifth connecting rods to rotate downward, the fifth connecting rod drives the lifting frame to rise through the sliding block, and the lifting frame drives the base plate to rise, completing the bottoming work of the pipe, reducing the bending of the pipe, reducing the error in cutting size, and reducing waste of resources. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 It is a schematic diagram of the structure of the utility model;
[0015] Figure 2 for Figure 1 A front partial sectional view of the
[0016] Figure 3 for Figure 2 A side partial cross-sectional view of
[0017] Figure 4 for Figure 3 A partial cross-sectional view of the clamping mechanism;
[0018] Figure 5 for Figure 2 A partial cross-sectional view of the middle lifting mechanism;
[0019] Figure 6 for Figure 2 A side partial cross-sectional view of the middle three-jaw chuck;
[0020] Figure 7 for Figure 2 A partial cross-sectional view from the front.
[0021] In the figure: 1, housing, 2, clamping mechanism, 201, second hydraulic cylinder, 202, transmission column, 203, first connecting rod, 204, second connecting rod, 205, third connecting rod, 206, clamping box, 3, lifting mechanism, 301, fourth motor, 302, fourth motor box, 303, first bevel gear, 304, second bevel gear, 305, worm, 306, worm wheel, 307, fourth connecting rod, 308, fifth connecting rod, 309, slide Moving block, 4, L-shaped frame, 5, box door, 6, observation window, 7, handle, 8, first motor, 9, first motor box, 10, second motor, 11, second motor box, 12, three-jaw chuck, 13, knob, 14, clamping block, 15, sliding frame, 16, first hydraulic cylinder, 17, first hydraulic box, 18, saw disk frame, 19, third motor, 20, third motor box, 21, saw disk, 22, lifting frame, 23, bottom plate, 24, base. DETAILED DESCRIPTION
[0022] The utility model is further described below in conjunction with the accompanying drawings:
[0023] Refer to the attached Figure 1-7In the present embodiment, a processing device for producing anti-deformation welded pipes includes a housing 1, a first motor 8 and a base 24. A clamping mechanism 2 is provided on the surface of the base 24. The clamping mechanism 2 includes a second hydraulic cylinder 201 and a clamping box 206. The surface of the clamping box 206 is fixedly connected to the surface of the base 24. The inner surface of the clamping box 206 is fixedly connected to the second hydraulic cylinder 201. The model of the second hydraulic cylinder 201 is selected according to actual needs to meet the work needs. The telescopic end of the second hydraulic cylinder 201 is fixedly connected to one end of the transmission column 202, so that the telescopic end of the second hydraulic cylinder 201 drives the transmission column 202 to rise or fall, and the transmission The column 202 is movably connected to one end of the two groups of first connecting rods 203 through a pin shaft, so that the transmission column 202 drives the first connecting rod 203 to move, and the other end of the first connecting rod 203 is movably connected to one end of the second connecting rod 204 through a pin shaft, so that the first connecting rod 203 drives the second connecting rod 204 to move, and the other end of the second connecting rod 204 is slidably connected to the protruding part of one end of the third connecting rod 205 through a provided slideway, so that the second connecting rod 204 drives the third connecting rod 205 to move, and the surface of the third connecting rod 205 is movably connected to the clamping box 206 through a pin shaft, and the other end of the third connecting rod 205 and the other end of the transmission column 202 are provided with rollers.
[0024] A lifting mechanism 3 is provided on the inner surface of the base 24, and the lifting mechanism 3 includes a fourth motor 301 and a fourth motor box 302. The surface of the fourth motor box 302 is fixedly connected to the inner surface of the base 24, and the fourth motor box 302 is fixedly connected to the fourth motor 301 through a bracket. The model of the fourth motor 301 is selected according to actual needs and meets the working needs. The output shaft of the fourth motor 301 passes through the fourth motor box 302 and is fixedly connected to the first bevel gear 303 through a reduction box, so that the output shaft of the fourth motor 301 drives the first bevel gear 303 to rotate through the reduction box, and the first bevel gear 303 is meshed with the second bevel gear 304, so that the first bevel gear 303 drives the second bevel gear 304 to rotate, and the second bevel gear 304 is rotatably connected to the inner surface of the base 24 through the cooperation of the pin shaft and the bearing, and the second bevel gear 304 is connected to the worm 30 through the cooperation of the pin shaft and the chain. The second bevel gear 304 is movably connected to the base 24, so that the second bevel gear 304 drives the worm 305 to rotate through the chain, the worm 305 is meshed with the two sets of worm wheels 306, so that the worm 305 drives the worm wheel 306 to rotate, the worm wheel 306 is movably connected to the base 24 through the cooperation of the pin shaft and the protruding part of the inner surface of the base 24, the worm wheel 306 is fixedly connected to one end of the fourth connecting rod 307 through the pin shaft, so that the worm wheel 306 drives the fourth third connecting rod 307 to rotate, the other end of the fourth connecting rod 307 is movably connected to one end of the fifth connecting rod 308, so that the fourth connecting rod 307 drives the fifth connecting rod 308 to move, one end of the fifth connecting rod 308 is movably connected to the surface of the sliding block 309 through the pin shaft, so that the fifth connecting rod 308 drives the sliding block 309 to move, and the sliding block 309 is slidably connected to the surface of the lifting frame 22 through the opening provided on the surface, so that the sliding block 309 drives the lifting frame 22 to rise or fall.
[0025] The inner surface of the casing 1 is fixedly connected to the surface of the clamping box 206, the inner surface of the casing 1 is fixedly connected to the surface of the base 24, the base 24 is slidably connected to the lifting frame 22 through an opening on the surface, one end of the lifting frame 22 is fixedly connected to the surface of the bottom plate 23, so that the lifting frame 22 drives the bottom plate 23 to rise or fall, the surface of the casing 1 is provided with two groups of L-shaped frames 4, the L-shaped frames 4 are slidably connected to two groups of box doors 5 through slides provided on the surface, the surface of the box door 5 is provided with an observation window 6, and the surface of the box door 5 is provided with a handle 7. The first motor 8 is fixedly connected to the first motor box 9 through a bracket. The model of the first motor 8 is selected according to actual needs and meets the work needs. The output shaft of the first motor 8 The output shaft of the first motor 8 passes through the first motor box 9, passes through the casing 1 and is rotatably connected with a group of chains through the reduction box, so that the output shaft of the first motor 8 drives the chain to rotate, and the protruding part of the chain is slidably engaged with the sliding frame 15 through the slideway provided on the surface of the sliding frame 15, so that the chain drives the sliding frame 15 to slide, and the sliding frame 15 is slidably engaged with the inner surface of the casing 1 through the slideway provided on the inner surface of the casing 1, and the surface of the sliding frame 15 is fixedly connected with the surface of the first hydraulic box 17, so that the sliding frame 15 drives the first hydraulic box 17 to slide, and the first hydraulic box 17 is fixedly connected with the first hydraulic cylinder 16 through the bracket. The model of the first hydraulic cylinder 16 is selected according to actual needs to meet the work needs. The telescopic end of the first hydraulic cylinder 16 passes through the first hydraulic box 17 and is fixedly connected to the surface of the saw disk frame 18, so that the telescopic end of the first hydraulic cylinder 16 drives the saw disk frame 18 to rise or fall, and the surface of the saw disk frame 18 is fixedly connected to the surface of the third motor box 20. The third motor 19 is fixedly connected to the third motor box 20 through a bracket. The model of the third motor 19 is selected according to actual needs to meet the work needs. The output shaft of the third motor 19 passes through the third motor box 20 and the saw disk frame 18 and is rotatably connected to the saw disk 21 through a chain, so that the output shaft of the third motor 19 drives the saw disk 21 to rotate through the chain, and the saw disk 21 is rotatably connected to the saw disk frame 18 through the cooperation of the pin shaft and the bearing. The casing 1 The protruding part on the inner surface is fixedly connected to the surface of the second motor box 11 and a group of reduction boxes through the support column. The second motor box 11 is fixedly connected to the second motor 10 through the bracket. The model of the second motor 10 is selected according to actual needs and can meet the working needs. The output shaft of the second motor 10 passes through the second motor box 11 and is fixedly connected to the surface of the three-jaw chuck 12 through the reduction box, so that the output shaft of the second motor 10 drives the three-jaw chuck 12 to rotate. The three-jaw chuck 12 is threadedly connected to the three groups of knobs 13 through the threaded holes provided on the surface. One end of the knob 13 is rotatably clamped with the surface of the clamping block 14 through the groove provided on the surface of the clamping block 14, and the surface of the clamping block 14 is provided with an anti-slip pad.
[0026] Working principle: Place the pipe between the rollers provided at one end of the transmission column 202 and the third connecting rod 205, and place one end of the pipe between the three groups of clamping blocks 14, turn the knob 13, the knob 13 drives the three groups of clamping blocks 14 to move closer to each other, and complete the fixation of one end of the pipe, connect the external power supply of the second hydraulic cylinder 201, start the extension of the telescopic end of the second hydraulic cylinder 201, the telescopic end of the second hydraulic cylinder 201 drives the transmission column 202 to rise, the transmission column 202 pushes the second connecting rod 204 to slide outward through the first connecting rod 203, and the second connecting rod 204 moves outward. 04 drives one end of the third connecting rod 205 to rotate upward, and the other end of the third connecting rod 205 to rotate downward, so that the three groups of rollers are close to each other, and the clamping work on the surface of the pipe is completed. The external power supply of the fourth motor 301 is connected, and the output shaft of the fourth motor 301 is started to rotate. The output shaft of the fourth motor 301 drives the first bevel gear 303 to rotate through the reduction box, and the first bevel gear 303 drives the second bevel gear 304 to rotate. The second bevel gear 304 drives the worm 305 to rotate through the chain, and the worm 305 drives the two groups of worm wheels 306 to rotate relatively. The two groups of worm wheels The wheel 306 drives the two sets of fourth connecting rods 307 to rotate upward, and the two sets of fourth connecting rods 307 drive one end of the two sets of fifth connecting rods 308 to rotate downward, and the fifth connecting rod 308 drives the lifting frame 22 to rise through the sliding block 309, and the lifting frame 22 drives the bottom plate 23 to rise, so as to complete the bottom support work of the pipe material, connect the external power supply of the second motor 10, start the output shaft of the second motor 10 to rotate, and the output shaft of the second motor 10 drives the three-jaw chuck 12 to rotate through the reduction box, and the three-jaw chuck 12 drives the pipe material to rotate, connect the external power supply of the first motor 8, and start the first The output shaft of the motor 8 rotates, and the output shaft of the first motor 8 drives the chain to rotate through the reduction gearbox, and the chain drives the sliding frame 15 to slide, and the sliding frame 15 drives the saw disk 21 to slide to a suitable position, and the external power supply of the first hydraulic cylinder 16 is turned on, and the telescopic end of the first hydraulic cylinder 16 is started to extend, and the first hydraulic cylinder 16 drives the saw disk frame 18 to descend, and the saw disk frame 18 drives the saw disk 21 to descend, and the external power supply of the third motor 19 is turned on, and the output shaft of the third motor 19 is started to rotate, and the output shaft of the third motor 19 drives the saw disk 21 to rotate, thereby completing the cutting of the pipe material.
[0027] Although the present invention has been shown and described with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein within the scope of the claims.
Claims
1. A processing device for producing anti-deformation welded pipes, comprising a housing (1), a first motor (8) and a base (24), characterized in that: The surface of the base (24) is provided with a clamping mechanism (2), and the clamping mechanism (2) comprises a second hydraulic cylinder (201) and a clamping box (206), the surface of the clamping box (206) is fixedly connected to the surface of the base (24), the inner surface of the clamping box (206) is fixedly connected to the second hydraulic cylinder (201), the telescopic end of the second hydraulic cylinder (201) is fixedly connected to one end of a transmission column (202), the transmission column (202) is movably connected to one end of two groups of first connecting rods (203) through a pin shaft, the other end of the first connecting rod (203) is movably connected to one end of a second connecting rod (204) through a pin shaft, and the second connecting rod (204) ) is slidably connected to a protruding portion of one end of a third connecting rod (205) through a provided slideway, the surface of the third connecting rod (205) is movably connected to a clamping box (206) through a pin shaft, the other end of the third connecting rod (205) and the other end of the transmission column (202) are provided with a roller, the inner surface of the housing (1) is fixedly connected to the surface of the clamping box (206), the inner surface of the housing (1) is fixedly connected to the surface of a base (24), the base (24) is slidably connected to a lifting frame (22) through an opening provided on the surface, one end of the lifting frame (22) is fixedly connected to the surface of a bottom plate (23), and the inner surface of the base (24) is provided with a lifting frame. The lifting mechanism (3) comprises a fourth motor (301) and a fourth motor box (302), the surface of the fourth motor box (302) being fixedly connected to the inner surface of the base (24), the fourth motor box (302) being fixedly connected to the fourth motor (301) through a bracket, the output shaft of the fourth motor (301) passing through the fourth motor box (302) being fixedly connected to the first bevel gear (303) through a reduction box, the first bevel gear (303) being meshed with the second bevel gear (304), the second bevel gear (304) being rotatably connected to the inner surface of the base (24) through the cooperation of a pin shaft and a bearing, the second bevel gear (304) being ) is movably connected to the worm (305) through the cooperation of the pin and the chain, the worm (305) is meshed with two sets of worm wheels (306), the worm wheels (306) are movably connected to the base (24) through the cooperation of the pin and the protruding part of the inner surface of the base (24), the worm wheel (306) is fixedly connected to one end of the fourth connecting rod (307) through the pin, the other end of the fourth connecting rod (307) is movably connected to one end of the fifth connecting rod (308), one end of the fifth connecting rod (308) is movably connected to the surface of the sliding block (309) through the pin, and the sliding block (309) is slidably connected to the surface of the lifting frame (22) through an opening provided on the surface.
2. The processing equipment for producing anti-deformation welded pipe according to claim 1, characterized in that: The surface of the casing (1) is provided with two groups of L-shaped frames (4), and the L-shaped frames (4) are slidably connected to two groups of cabinet doors (5) via slideways provided on the surface, and the surfaces of the cabinet doors (5) are provided with observation windows (6), and the surfaces of the cabinet doors (5) are provided with handles (7).
3. The processing equipment for producing anti-deformation welded pipe according to claim 2, characterized in that: The first motor (8) is fixedly connected to the first motor box (9) through a bracket, the output shaft of the first motor (8) passes through the first motor box (9), the output shaft of the first motor (8) passes through the casing (1) through a reduction box and is rotatably connected to a group of chains, the protruding part of the chain is slidably engaged with the sliding frame (15) through a slideway provided on the surface of the sliding frame (15), the sliding frame (15) is slidably engaged with the inner surface of the casing (1) through a slideway provided on the inner surface of the casing (1), the surface of the sliding frame (15) is fixedly connected to the surface of the first hydraulic box (17), and the first hydraulic box (17) is connected to the first hydraulic box (17). 7) is fixedly connected to the first hydraulic cylinder (16) through a bracket, the telescopic end of the first hydraulic cylinder (16) passes through the first hydraulic box (17) and is fixedly connected to the surface of the saw disc frame (18), the surface of the saw disc frame (18) is fixedly connected to the surface of the third motor box (20), the third motor (19) is fixedly connected to the third motor box (20) through the bracket, the output shaft of the third motor (19) passes through the third motor box (20) and the saw disc frame (18) and is rotatably connected to the saw disc (21) through a chain, and the saw disc (21) is rotatably connected to the saw disc frame (18) through the cooperation of a pin shaft and a bearing.
4. The processing equipment for producing anti-deformation welded pipe according to claim 1, characterized in that: The protruding portion provided on the inner surface of the casing (1) is fixedly connected to the surface of the second motor box (11) and a group of reduction boxes through a support column; the second motor box (11) is fixedly connected to the second motor (10) through a bracket; the output shaft of the second motor (10) passes through the second motor box (11) and is fixedly connected to the surface of the three-jaw chuck (12) through the reduction box; the three-jaw chuck (12) is threadedly connected to the three groups of knobs (13) through threaded holes provided on the surface; one end of the knob (13) is rotatably engaged with the surface of the clamping block (14) through a groove provided on the surface of the clamping block (14); and the surface of the clamping block (14) is provided with an anti-slip pad.