A pipe end machine and a pipe fitting processing method

Abstract

The present invention provides a pipe end machine and a pipe fitting processing method, comprising a frame, a turntable positioning mechanism vertically arranged on the frame, a feeding mechanism arranged at one end of the turntable positioning mechanism, two chamfering mechanisms symmetrically arranged below the turntable positioning mechanism, two expanding mechanisms / shrinking mechanisms symmetrically arranged at the other end of the turntable positioning mechanism, a locking mechanism arranged between the two expanding mechanisms / shrinking mechanisms, and a discharging mechanism arranged above the turntable positioning mechanism. The pipe end machine integrates the feeding, chamfering, expanding / shrinking and unloading of pipe fittings, has a high degree of integration, a compact structure, can process multiple pipe fittings at the same time, and the processing efficiency is improved by more than 40% compared with traditional pipe fitting processing.

Description

Technical Field

[0001] The invention relates to the technical field of pipe fitting processing, and in particular to a pipe end machine and a pipe fitting processing method. Background Art

[0002] Copper tubes are often used in the fields of air conditioners, automobiles, etc., and need to be processed, including chamfering the two end faces, and expanding / shrinking the ends after chamfering to form annular convex ridges. In the prior art, chamfering and expanding / shrinking operations are usually performed separately by different equipment, which has complicated procedures and requires more manpower. Moreover, it takes a long time to process a product, which is inefficient and has high production costs. Summary of the invention

[0003] The technical problem solved by the present invention is to provide a pipe end machine and a pipe fitting processing method which integrates automatic feeding, chamfering, and expansion / shrinking.

[0004] In order to solve the above technical problems, the present invention provides a pipe end machine, including a frame, a turntable positioning mechanism vertically arranged on the frame, a feeding mechanism arranged at one end of the turntable positioning mechanism, two chamfering mechanisms symmetrically arranged below the turntable positioning mechanism, two expanding mechanisms / shrinking mechanisms symmetrically arranged at the other end of the turntable positioning mechanism, a locking mechanism arranged between the two expanding mechanisms / shrinking mechanisms, and a discharging mechanism arranged above the turntable positioning mechanism.

[0005] Furthermore, the turntable positioning mechanism includes a turntable, four clamping mold assemblies evenly distributed on the turntable along the circumferential direction, two vertical plates arranged on both sides of the turntable, a rotating shaft connected to the turntable, a driven wheel arranged at one end of the rotating shaft, a mounting bracket connected to the two vertical plates, and a turntable motor unit arranged on the mounting bracket to drive the driven wheel to rotate.

[0006] Furthermore, the outer edge of the turntable is evenly provided with mounting grooves along its circumference, and the clamping assembly includes a lower die seat arranged in the mounting groove, an upper die seat connected to one side of the lower die seat, a pressure block arranged on the upper die seat, a guide groove arranged on the other side of the lower die seat, two wedge blocks slidingly matched with the guide groove, two pressure plates arranged at both ends of the lower die seat, and a tensioning block arranged between adjacent pressure plates and the wedge blocks, the two wedge blocks are connected to the lower die seat, and the lower die seat and the upper die seat are respectively connected by pull rods, a rear locking hole is formed between the lower die seat and the upper die seat, and a front locking hole is formed between the two wedge blocks.

[0007] Furthermore, the discharging mechanism includes a hopper arranged on one side of the turntable, a discharging push rod arranged on the other end of the turntable, a discharging cylinder driving the discharging push rod to advance and retreat, a stripping block arranged on the outer end of the turntable corresponding to the clamping assembly, a stripping joint connected to the stripping block, and a stripping cylinder driving the stripping joint to rise and fall; the discharging cylinder is installed on one side of the mounting bracket, and the stripping cylinder is installed on the mounting bracket.

[0008] Furthermore, auxiliary support components are respectively provided at both ends of the vertical plate, and the auxiliary support components include a support block connected to the vertical plate, a support shaft arranged outside the support block, and a bearing arranged on the support shaft, and the outer edge of the bearing abuts against the outer edge of the turntable.

[0009] Furthermore, the feeding mechanism includes a vibration plate, a first base arranged on one side of the vibration plate, a material channel arranged on the first base and connected to the vibration plate, a baffle arranged at the tail of the material channel, two limit plates arranged on both sides of the material channel, two through holes arranged on the limit plates, a feeding push rod arranged on the outside of one of the through holes, a feeding cylinder driving the feeding push rod to advance and retreat, a positioning rod arranged on the outside of the other through hole, a chuck arranged between the other through hole and the positioning rod, and a feeding positioning cylinder driving the chuck to advance and retreat.

[0010] Furthermore, each of the chamfering mechanisms includes two first X-axis slide rails arranged on the frame, a first sliding plate slidingly matched with the two first X-axis slide rails, a chamfering motor arranged on the first sliding plate, a chamfering knife arranged at the output end of the chamfering motor, a chamfering drive cylinder driving the first sliding plate to slide along the two first X-axis slide rails, a buffer block arranged at one end of the two first X-axis slide rails, a buffer arranged on one side of the first sliding plate, a chamfering pressure block arranged directly below the turntable positioning mechanism, and a chamfering locking cylinder driving the chamfering pressure block to rise and fall.

[0011] Furthermore, each of the expanding mechanism / shrinking mechanism includes a second base, a second X-axis slide rail arranged on the second base, a second sliding plate slidably matched with the second X-axis slide rail, a punch mounting block arranged on the second sliding plate, an expanding punch / shrinking punch arranged at the front end of the punch mounting block, a slide groove arranged at the rear end of the punch mounting block, a slider slidably matched with the slide groove, an expanding cylinder connected to the slider to drive the second sliding plate to slide along the second X-axis slide rail, and a detection switch arranged on the outside of the second sliding plate.

[0012] Furthermore, the locking mechanism includes a mounting frame, a locking cylinder disposed on the mounting frame, and a cylinder pressure head disposed at an output end of the locking cylinder.

[0013] The present invention also provides a pipe processing method, comprising the pipe end machine as described in any one of the above, the method comprising the following steps:

[0014] a) The feeding mechanism loads the pipe fittings onto the turntable positioning mechanism;

[0015] b) The turntable positioning mechanism rotates the pipe fitting to two chamfering mechanisms, which process the two end faces of the pipe fitting respectively and chamfer the two ends of the pipe fitting;

[0016] c) The turntable positioning mechanism rotates the chamfered pipe fittings to the two expanding / shrinking mechanisms, and the locking mechanism locks the pipe fittings;

[0017] d) Two expanding mechanisms / shrinking mechanisms expand the two ends of the pipe fitting respectively, and extrude annular convex ridges at the two ends of the pipe fitting;

[0018] e) The turntable positioning mechanism rotates the expanded / shrinked pipe fittings to the discharging mechanism, and the discharging mechanism discharges the expanded / shrinked pipe fittings.

[0019] The tube end machine of the present invention has the feeding mechanism feeding the tube fittings onto the turntable positioning mechanism, and after the turntable positioning mechanism positions the tube fittings, the tube fittings are rotated to the two chamfering mechanisms, and after the two end faces of the tube fittings are processed by the two chamfering mechanisms, the two ends of the tube fittings are chamfered, and after chamfering, the turntable positioning mechanism rotates the tube fittings to the two expanding mechanisms / shrinking mechanisms, and after the locking mechanism locks the tube fittings, the two expanding mechanisms / shrinking mechanisms expand / shrink the two ends of the tube fittings, and the drum forms annular convex ridges, and then the turntable positioning mechanism rotates the tube fittings to the discharging mechanism, and the discharging mechanism discharges the expanded / shrinked tube fittings, thereby completing the automatic loading, chamfering, expanding / shrinking and unloading of the tube fittings; the tube end machine integrates the loading, chamfering, expanding and unloading of the tube fittings, has a high degree of integration, a compact structure, can process multiple tube fittings at the same time, and the processing efficiency is improved by more than 40% compared with traditional tube fitting processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic diagram of a pipe end machine of the present invention;

[0021] Figure 2 It is a schematic diagram of the feeding mechanism of the tube end machine of the present invention in a removed state;

[0022] Figure 3 for Figure 2 A partial enlarged view of the middle A;

[0023] Figure 4 is a schematic diagram of a clamping die assembly of a pipe end machine of the present invention;

[0024] Figure 5 is a schematic diagram of a feeding mechanism of a tube end machine of the present invention;

[0025] Figure 6 is a schematic diagram of a chamfering mechanism of a pipe end machine of the present invention;

[0026] Figure 7 It is a schematic diagram of the expansion mechanism / shrinking mechanism of the pipe end machine of the present invention;

[0027] Marked in the figure: frame 1, turntable positioning mechanism 2, turntable 21, clamping die assembly 22, pull rod 220, lower die base 221, upper die base 222, pressure block 223, guide groove 224, wedge block 225, pressure plate 226, tension block 227, rear locking hole 228, front locking hole 229, vertical plate 23, rotating shaft 24, driven wheel 25, mounting bracket 26, turntable motor unit 27, auxiliary support assembly 28, support block 281, support shaft 282, bearing 283, feeding mechanism 3, vibration plate 30, first base 31, material channel 32, baffle 33, limit plate 34, through hole 341, feeding ejector rod 35, feeding cylinder 36, positioning rod 37, chuck 38, feed positioning cylinder 39, chamfering mechanism 4, limit block 40, first X-axis slide rail 41, first sliding plate 42, chamfering motor 43, chamfering knife 44, chamfering drive cylinder 45, buffer block 46, buffer 47, chamfering pressure block 48, chamfering locking cylinder 49, expanding mechanism / shrinking mechanism 5, second base 50, second X-axis slide rail 51, second sliding plate 52, punch mounting block 53, expanding punch / shrinking punch 54, slide groove 55, slider 56, expanding cylinder 57, detection switch 58, locking mechanism 6, discharging mechanism 7, hopper 71, discharging push rod 72, discharging cylinder 73. DETAILED DESCRIPTION

[0028] The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0029] The following combination Figures 1 to 7 The specific embodiments of the present invention are explained and described in detail:

[0030] The present invention provides a pipe end machine, comprising a frame 1, a turntable positioning mechanism 2 vertically arranged on the frame 1, a feeding mechanism 3 arranged at one end of the turntable positioning mechanism 2, two chamfering mechanisms 4 symmetrically arranged below the turntable positioning mechanism 2, two expanding mechanisms / shrinking mechanisms 5 symmetrically arranged at the other end of the turntable positioning mechanism 2, a locking mechanism 6 arranged between the two expanding mechanisms / shrinking mechanisms 5, and a discharging mechanism 7 arranged above the turntable positioning mechanism 2. The feeding mechanism 3 feeds the pipe fittings onto the turntable positioning mechanism 2. After the turntable positioning mechanism 2 positions the pipe fittings, the pipe fittings are rotated to the two chamfering mechanisms 4. After the two end faces of the pipe fittings are processed by the two chamfering mechanisms 4, the two ends of the pipe fittings are chamfered. After chamfering, the turntable positioning mechanism 2 rotates the pipe fittings to the two expanding / shrinking mechanisms 5. After the locking mechanism 6 locks the pipe fittings, the two expanding / shrinking mechanisms 5 expand / shrink the two ends of the pipe fittings, and the annular convex ridges are formed by extrusion. Then, the turntable positioning mechanism 2 rotates the pipe fittings to the discharging mechanism 7. The discharging mechanism 7 discharges the expanded pipe fittings, completing the automatic loading, chamfering, expanding / shrinking and unloading of the pipe fittings. The pipe end machine integrates the loading, chamfering, expanding / shrinking and unloading of pipe fittings, has a high degree of integration, a compact structure, can process multiple pipe fittings at the same time, and the processing efficiency is improved by more than 40% compared with traditional pipe processing.

[0031] The turntable positioning mechanism 2 includes a turntable 21, four clamping mold assemblies 22 evenly arranged on the turntable 21 along the circumferential direction, two vertical plates 23 arranged on both sides of the turntable 21, a rotating shaft 24 connected to the turntable 21, a driven wheel 25 arranged at one end of the rotating shaft 24, a mounting bracket 26 connected to the two vertical plates 23, and a turntable motor unit 27 arranged on the mounting bracket 26 to drive the driven wheel 25 to rotate. The turntable motor unit 27 includes a driving wheel connected to the turntable motor and a belt tightened on the driving wheel and the driven wheel 25. The turntable motor unit 27 drives the driven wheel 25 to rotate, driving the turntable 21 to rotate. Each time it rotates a preset angle, the pipe fitting can be rotated to the next station.

[0032] The outer edge of the turntable 21 is evenly provided with mounting grooves (not marked) along its circumference, and the clamping assembly 22 includes a lower die seat 221 arranged in the mounting groove, an upper die seat 222 connected to one side of the lower die seat 221, a pressure block 223 arranged on the upper die seat 222, a guide groove 224 arranged on the other side of the lower die seat 221, two wedge blocks 225 slidingly matched with the guide groove 224, two pressure plates 226 arranged at both ends of the lower die seat 221, and a tensioning block 227 arranged between adjacent pressure plates 226 and the wedge blocks 225, the two wedge blocks 225 are connected to the lower die seat 221, the lower die seat 221 and the upper die seat 222 respectively by a pull rod 220, a rear locking hole 228 is formed between the lower die seat 221 and the upper die seat 222, and a front locking hole 229 is formed between the two wedge blocks 225. The pipe fitting is located in the rear locking hole 228 and the front locking hole 229 between the upper die base 222 and the lower die base 221. During feeding, the feeding mechanism 3 can drive the pressing block 223 and the upper die base 222 to move toward the direction close to the lower die base 221 to clamp the pipe fitting. External force from the feeding mechanism 3 or the chamfering mechanism 4 or the expanding mechanism / shrinking mechanism 5 can drive the two tensioning blocks 227 forward and drive the two wedge blocks 225 close to each other, thereby clamping the pipe fitting.

[0033] The feeding mechanism 3 includes a vibration plate 30, a first base 31 arranged on one side of the vibration plate 30, a material channel 32 arranged on the first base 31 and connected to the vibration plate 30, a baffle plate 33 arranged at the tail of the material channel 32, two limit plates 34 arranged on both sides of the material channel 32, two through holes 341 arranged on the limit plates 34, a feeding push rod 35 arranged on the outside of one of the through holes 341, a feeding cylinder 36 driving the feeding push rod 35 to advance and retreat, a positioning rod 37 arranged on the outside of the other through hole 341, a chuck 38 arranged between the other through hole 341 and the positioning rod 37, and a feeding positioning cylinder 39 driving the chuck 38 to advance and retreat. The pipe slides from the material channel 32 to the baffle 33, and the feed cylinder 36 drives the feed push rod 35 forward to push a pipe into one of the clamping die assemblies 22. After one end of the pipe is blocked and positioned by the positioning rod 37, the feed positioning cylinder 39 drives the chuck 38 forward, and the chuck 38 drives the pressure plate 226 and the upper die seat 221 forward to clamp the pipe.

[0034] The discharging mechanism 7 includes a hopper 71 arranged on one side of the turntable 21, a discharging push rod 72 arranged on the other end of the turntable 21, a discharging cylinder 73 driving the discharging push rod 72 to advance and retreat, a stripping block arranged on the outer end of the turntable 21 and corresponding to the clamping mold assembly 22, a stripping joint connected to the stripping block, and a stripping cylinder driving the stripping joint to rise and fall; the discharging cylinder is installed on one side of the mounting bracket 26, and the stripping cylinder is installed on the mounting bracket 26. After the pipe fittings are processed, when they rotate to the discharging mechanism 7, the stripping cylinder drives the stripping joint and the stripping block to rise, loosens the product, and then the discharging cylinder 73 drives the discharging push rod 72 forward to push the pipe fittings into the hopper 71, thus completing the automatic discharging of the product.

[0035] Auxiliary support components 28 are respectively provided at both ends of the vertical plate 23, and the auxiliary support components 28 include a support block 281 connected to the vertical plate 23, a support shaft 282 provided outside the support block 281, and a bearing 283 provided on the support shaft 282, and the outer edge of the bearing 283 abuts against the outer edge of the turntable 21. The turntable 21 is further positioned by the four bearings 283, which can prevent the turntable 21 from being tilted at an angle, and the positioning accuracy is higher, thereby ensuring higher processing accuracy of the pipe fittings.

[0036] Each of the chamfering mechanisms 4 includes two first X-axis slide rails 41 arranged on the frame 1, a first sliding plate 42 slidingly matched with the two first X-axis slide rails 41, a chamfering motor 43 arranged on the first sliding plate 42, a chamfering knife 44 arranged at the output end of the chamfering motor 43, a chamfering drive cylinder 45 driving the first sliding plate 42 to slide along the two first X-axis slide rails 41, a buffer block 46 arranged at one end of the two first X-axis slide rails 41, a buffer 47 arranged on one side of the first sliding plate 42, a chamfering pressure block 48 arranged directly below the turntable positioning mechanism 2, and a chamfering locking cylinder 49 driving the chamfering pressure block 48 to rise and fall, and a limit block 40 is arranged at the output end of the chamfering drive cylinder 45. The chamfering locking cylinder 49 drives the chamfering pressure block 48 to rise, drives the two tensioning blocks 227 to move forward, thereby driving the two wedge blocks 225 to approach each other to clamp the pipe fitting, and then the chamfering driving cylinder 45 drives the first sliding plate 42 to move along the first X-axis slide rail 41 toward the direction close to the turntable 21, and the chamfering motor 43 drives the chamfering knife 44 to rotate, so as to process the end face of the pipe fitting and chamfer the end face.

[0037] Each of the expanding mechanism / shrinking mechanism 5 includes a second base 50, a second X-axis slide rail 51 arranged on the second base 50, a second sliding plate 52 slidably matched with the second X-axis slide rail 51, a punch mounting block 53 arranged on the second sliding plate 52, an expanding punch / shrinking punch 54 arranged at the front end of the punch mounting block 53, a slide groove 55 arranged at the rear end of the punch mounting block 53, a slider 56 slidably matched with the slide groove 55, an expanding cylinder 57 connected to the slider 56 to drive the second sliding plate 52 to slide along the second X-axis slide rail 51, and a detection switch 58 arranged on the outside of the second sliding plate 52. The expanding cylinder 57 drives the punch mounting block 53 and the expanding punch / shrinking punch 54 forward, and the expanding punch / shrinking punch 54 slowly extends into the pipe fitting to expand and bulge the pipe fitting, and process annular convex ridges at both ends of the pipe fitting; the detection switch 58 is used to detect the forward length of the expanding cylinder 57, that is, to detect the expanding length. After the detection length is reached, the expanding cylinder 57 stops moving forward; the expanding punch 54 can also be replaced with a shrinking punch for shrinking the pipe fitting. In this way, the pipe end machine can be used for both expanding and shrinking pipe fittings, and has a wider range of applications.

[0038] The locking mechanism 6 includes a mounting frame, a locking oil cylinder disposed on the mounting frame, and an oil cylinder pressure head disposed at the output end of the locking oil cylinder. Because the oil pressure during expansion is very large, the locking oil cylinder drives the oil cylinder pressure head to lock the product, which is more stable and reliable.

[0039] The present invention also provides a pipe processing method, comprising the pipe end machine as described in any one of the above, the method comprising the following steps:

[0040] a) The feeding mechanism 3 feeds the pipe fittings onto the turntable positioning mechanism 2;

[0041] b) The turntable positioning mechanism 2 rotates the pipe fitting to the two chamfering mechanisms 4, and the two chamfering mechanisms 4 process the two end faces of the pipe fitting respectively and chamfer the two ends of the pipe fitting;

[0042] c) The turntable positioning mechanism 2 rotates the chamfered pipe to the two expanding / shrinking mechanisms 5, and the locking mechanism 6 locks the pipe;

[0043] d) two expanding / shrinking mechanisms 5 expand / shrink the two ends of the pipe fitting respectively, and extrude annular convex ridges at the two ends of the pipe fitting;

[0044] e) The turntable positioning mechanism 2 rotates the expanded / shrinked pipe fittings to the discharging mechanism 7, and the discharging mechanism 7 discharges the expanded / shrinked pipe fittings.

[0045] The pipe end machine of the present invention, the feeding mechanism 3 feeds the pipe fittings onto the turntable positioning mechanism 2, and after the turntable positioning mechanism 2 positions the pipe fittings, the pipe fittings are rotated to the two chamfering mechanisms 4, and after the two end faces of the pipe fittings are processed by the two chamfering mechanisms 4, the two ends of the pipe fittings are chamfered, and after chamfering, the turntable positioning mechanism 2 rotates the pipe fittings to the two expanding mechanisms / shrinking mechanisms 5, and after the locking mechanism 6 locks the pipe fittings, the two expanding mechanisms / shrinking mechanisms 5 are positioned on the pipe fittings. The two ends of the pipe are expanded / shrinked, and the drum is extruded to form an annular convex ridge. Then the turntable positioning mechanism 2 rotates the pipe to the discharging mechanism 7, and the discharging mechanism 7 discharges the expanded pipe, completing the automatic loading, chamfering, expanding / shrinking and unloading of the pipe. The pipe end machine integrates the loading, chamfering, expanding / shrinking and unloading of the pipe, has a high degree of integration, a compact structure, can process multiple pipes at the same time, and the processing efficiency is increased by more than 40% compared with traditional pipe processing.

[0046] The above is only the best embodiment of the present invention and does not limit the present invention in any form. Any technician familiar with the field can make many possible changes and modifications to the technical solution of the present invention by using the method disclosed above without departing from the scope of the technical solution of the present invention, which all fall within the scope of protection of the claims.

Claims

1. A pipe end machine, characterized in that: It includes a frame, a turntable positioning mechanism vertically arranged on the frame, a feeding mechanism arranged at one end of the turntable positioning mechanism, two chamfering mechanisms symmetrically arranged below the turntable positioning mechanism, two expanding mechanisms or shrinking mechanisms symmetrically arranged at the other end of the turntable positioning mechanism, a locking mechanism arranged between the two expanding mechanisms or shrinking mechanisms, and a discharging mechanism arranged above the turntable positioning mechanism; The turntable positioning mechanism includes a turntable, four clamping mold assemblies uniformly arranged on the turntable along the circumferential direction, two vertical plates arranged on both sides of the turntable, a rotating shaft connected to the turntable, a driven wheel arranged at one end of the rotating shaft, a mounting bracket connected to the two vertical plates, and a turntable motor unit arranged on the mounting bracket to drive the driven wheel to rotate; The outer edge of the turntable is evenly provided with mounting grooves along its circumference, and the clamping die assembly includes a lower die seat arranged in the mounting groove, an upper die seat connected to one side of the lower die seat, a pressure block arranged on the upper die seat, a guide groove arranged on the other side of the lower die seat, two wedge blocks slidably matched with the guide groove, two pressure plates arranged at both ends of the lower die seat, and a tensioning block arranged between adjacent pressure plates and the wedge blocks, the two wedge blocks are connected to the lower die seat, the lower die seat and the upper die seat respectively through tie rods, a rear locking hole is formed between the lower die seat and the upper die seat, and a front locking hole is formed between the two wedge blocks; The discharging mechanism includes a hopper arranged on one side of the turntable, a discharging push rod arranged on the other end of the turntable, a discharging cylinder driving the discharging push rod to advance and retreat, a stripping block arranged on the outer end of the turntable corresponding to the clamping mold assembly, a stripping joint connected to the stripping block, and a stripping cylinder driving the stripping joint to rise and fall; the discharging cylinder is installed on one side of the mounting bracket, and the stripping cylinder is installed on the mounting bracket.

2. The pipe end machine according to claim 1, characterized in that: Auxiliary support components are respectively arranged at both ends of the vertical plate, and the auxiliary support components include a support block connected to the vertical plate, a support shaft arranged outside the support block, and a bearing arranged on the support shaft, and the outer edge of the bearing abuts against the outer edge of the turntable.

3. The pipe end machine according to claim 1, characterized in that: The feeding mechanism includes a vibration plate, a first base arranged on one side of the vibration plate, a material channel arranged on the first base and connected to the vibration plate, a baffle arranged at the tail of the material channel, two limit plates arranged on both sides of the material channel, two through holes arranged on the limit plates, a feeding push rod arranged on the outside of one of the through holes, a feeding cylinder driving the feeding push rod to advance and retreat, a positioning rod arranged on the outside of the other through hole, a chuck arranged between the other through hole and the positioning rod, and a feeding positioning cylinder driving the chuck to advance and retreat.

4. The pipe end machine according to claim 1, characterized in that: Each of the chamfering mechanisms includes two first X-axis slide rails arranged on the frame, a first sliding plate slidably matched with the two first X-axis slide rails, a chamfering motor arranged on the first sliding plate, a chamfering knife arranged at the output end of the chamfering motor, a chamfering drive cylinder driving the first sliding plate to slide along the two first X-axis slide rails, a buffer block arranged at one end of the two first X-axis slide rails, a buffer arranged on one side of the first sliding plate, a chamfering pressure block arranged directly below the turntable positioning mechanism, and a chamfering locking cylinder driving the chamfering pressure block to rise and fall.

5. The pipe end machine according to claim 1, characterized in that: Each of the expanding mechanisms or shrinking mechanisms includes a second base, a second X-axis slide rail arranged on the second base, a second sliding plate slidably matched with the second X-axis slide rail, a punch mounting block arranged on the second sliding plate, an expanding punch or shrinking punch arranged at the front end of the punch mounting block, a slide groove arranged at the rear end of the punch mounting block, a slider slidably matched with the slide groove, an expanding or shrinking cylinder connected to the slider and driving the second sliding plate to slide along the second X-axis slide rail, and a detection switch arranged on the outside of the second sliding plate.

6. The pipe end machine according to claim 1, characterized in that: The locking mechanism comprises a mounting frame, a locking oil cylinder arranged on the mounting frame, and an oil cylinder pressure head arranged at an output end of the locking oil cylinder.

7. A pipe processing method, characterized in that: The method comprises the following steps: a) The feeding mechanism loads the pipe fittings onto the turntable positioning mechanism; b) The turntable positioning mechanism rotates the pipe fitting to two chamfering mechanisms, which process the two end faces of the pipe fitting respectively and chamfer the two ends of the pipe fitting; c) The turntable positioning mechanism rotates the chamfered pipe fittings to the two expanding mechanisms or shrinking mechanisms, and the locking mechanism locks the pipe fittings; d) Two expanding mechanisms or shrinking mechanisms expand or shrink the two ends of the pipe fitting respectively, and extrude annular convex ridges at the two ends of the pipe fitting; e) The turntable positioning mechanism rotates the expanded or shrunken pipe fittings to the discharging mechanism, and the discharging mechanism discharges the expanded or shrunken pipe fittings.

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