Multi-station pipe end cutting-off all-in-one machine for pipe fittings

Abstract

The utility model discloses a multi-station pipe end cutting-off all-in-one machine for pipe fittings. The multi-station pipe end cutting-off all-in-one machine comprises a workbench, and a feeding mechanism, a clamping mechanism, a cutting mechanism and a multi-stage reducing pipe end mechanism which are sequentially fixed on the workbench in the first direction. The device is compact in overall structure and low in space occupancy rate, integrates automatic fixed-length feeding, multi-stage variable-diameter expanding and necking operation and automatic cutting of formed to-be-machined pipe fittings, can achieve continuous machining and one-time forming of the to-be-machined pipe fittings, shortens production time, reduces cost and improves production efficiency; in addition, the safety performance of the device is greatly improved, the situation that dust and high-temperature scrap iron are diffused to the environment to cause harm to the body health of operators is avoided, and the situation that pipe fittings drift or fly out in the cutting process to cause accidental injury to the operators is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical processing, in particular to a multi-station pipe end cutting integrated machine for pipe fittings. Background Art

[0002] At present, the forming of steel metal pipe ends generally includes cutting of the metal pipe ends and multi-stage variable diameter expansion and contraction operations, so that the pipe ends finally meet the predetermined forming requirements. The current cutting operation is performed on a cutting machine, while the multi-stage variable diameter expansion and contraction is performed on different expansion and contraction machines. It can be seen that the existing pipe end machines cannot integrate automatic fixed-length feeding (fixed-length feeding means that the equipment feeds at a fixed length) and multi-stage variable diameter expansion and contraction operations for continuous processing of long straight metal pipes. They need to be performed on different equipment, with complex procedures, long processes, and low pipe end forming efficiency. In addition, the existing pipe end machines will generate a large amount of dust and high-temperature iron filings when cutting pipe fittings. These dust and high-temperature iron filings will spread to the environment and cause harm to the health of the operators. In addition, the pipe fittings sometimes drift or fly out during the cutting process, which can easily cause accidental injuries to the operators. Utility Model Content

[0003] In order to solve the above two major problems at the same time, the utility model provides a multi-station pipe end cutting integrated machine including a workbench, on which a feeding mechanism, a clamping mechanism, a cutting mechanism and a multi-stage variable diameter pipe end mechanism are sequentially fixed along a first direction. After the pipe is clamped by the clamping mechanism, it is transported to the cutting mechanism through the feeding mechanism for cutting, and finally the pipe end is passed through the multi-stage variable diameter pipe end mechanism; the clamping mechanism is used to clamp the pipe to be processed, the feeding mechanism is used to transport the pipe to be processed, the cutting mechanism is used to cut the pipe to be processed, and the multi-stage variable diameter pipe end mechanism is used to perform expansion and contraction and flat end processing on the pipe to be processed;

[0004] The cutting mechanism includes a saw blade fixing seat, which is fixed on the workbench, a third driving device is fixed on the top of the saw blade fixing seat, a second slide rail assembly is provided on the saw blade fixing seat along the third direction, the third driving device drives the second slide rail assembly to move up and down along the third direction, a fourth driving device and a saw blade are fixedly connected to the second slide rail assembly, the fourth driving device drives the saw blade to rotate, a dust collection box is provided at the bottom of the saw blade fixing seat, a detachable pipe fixing support is provided inside the dust collection box, the pipe fixing support is obtained by matching two fixing blocks with notches, the width of the notch is sufficient for the saw blade to extend into, and a channel is provided in the middle of the pipe fixing support for the pipe to pass through.

[0005] Furthermore, the feeding mechanism includes a guide wheel assembly and a first slide rail assembly fixed on the workbench. The guide wheel assembly is fixed at the rightmost end of the first slide rail assembly along the first direction. The guide wheel assembly includes a guide wheel fixing seat, a guide wheel fixed on the guide wheel fixing seat, and a first driving device. The guide wheel fixing seat is fixed on the workbench, the guide wheel is fixed inside the guide wheel fixing seat, and the first driving device drives the guide wheel to rotate.

[0006] Furthermore, the first slide rail assembly includes a first slide rail, a first slider and a first slide plate. The first slide rail is fixed on the workbench. The first slide rail is provided with a first slider. The first slide plate is fixedly connected to the first slider. The first slide plate is slidably connected to the first slide rail through the first slider.

[0007] Furthermore, the clamping mechanism includes an upper clamp and a lower clamp. The lower clamp is fixed on the first slide. The first slide is also provided with a support column. A second drive device is fixed on the top of the support column. The driving end of the second drive device is fixedly connected to the upper clamp. The second drive device drives the upper clamp to move closer to or away from the lower clamp.

[0008] Furthermore, the multi-stage variable diameter pipe end mechanism includes an expanding and contracting mouth assembly and a flat mouth assembly, both of which are fixed on a fourth slide rail assembly, the fourth slide rail assembly is arranged along the first direction, the fourth slide rail assembly is fixed on the third slide rail assembly and is slidably connected to the third slide rail assembly, and the third slide rail assembly is arranged along the second direction.

[0009] Furthermore, the third slide rail assembly includes a third slide rail, a third slider and a third slide plate. The third slide rail is arranged on the workbench along the second direction. The third slide rail is provided with a third slider. The third slider is fixedly connected to the third slide plate. The third slide plate is slidably connected to the third slide rail through the third slider.

[0010] Furthermore, the fourth slide rail assembly includes a fourth slide rail, a fourth slider and a fourth slide plate. The fourth slide rail is arranged on the third slide plate along the first direction. The fourth slide rail is provided with a fourth slider. The fourth slider is fixedly connected to the fourth slider. The fourth slide plate is slidably connected to the fourth slide rail through the fourth slider.

[0011] Furthermore, the expansion and shrinking assembly includes multiple expansion jigs of different specifications and multiple shrinking jigs of different specifications. The multiple expansion jigs and shrinking jigs are arranged in a matrix as a whole. The expansion jig and the shrinking jig are fixed on the fourth slide. The expansion jig and the shrinking jig are fixedly connected to the driving end of the fifth driving device. The fifth driving device drives the expansion jig and the shrinking jig to perform the expansion process and the shrinking process respectively.

[0012] Furthermore, the flat-end assembly includes a plurality of flat-end jigs of different specifications, which are fixed on the fourth slide plate and fixedly connected to the driving end of the sixth driving device. The sixth driving device drives the flat-end jig to rotate to perform flat-end grinding on the pipe to be processed.

[0013] Furthermore, a mechanical clamp is provided on the left side of the multi-stage variable diameter pipe end mechanism along the second direction, and the mechanical clamp is fixed on the fourth slide plate.

[0014] The beneficial effects are: the overall structure of the device is compact, the space occupancy rate is low, and it integrates automatic fixed-length feeding, multi-stage variable diameter expansion and contraction operations, and automatic cutting of the formed pipe fittings to be processed. It can realize continuous processing of the pipe fittings to be processed, one-time forming, shortening production time, reducing costs, and improving production efficiency. In addition, the safety performance of the device is greatly improved, and there is no need to worry about dust and high-temperature iron filings spreading into the environment and causing harm to the health of the operator, let alone worrying about the pipe fittings drifting or flying out during the cutting process, causing accidental injury to the operator. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0016] Figure 1 The overall structure of the multi-station pipe end cutting machine Figure 1 ;

[0017] Figure 2 A schematic diagram of the partial structure of a multi-station pipe end cutting machine Figure 1 ;

[0018] Figure 3 The overall structure of the multi-station pipe end cutting machine Figure 2 ;

[0019] Figure 4 It is a schematic diagram of the structure of the pipe fixing support;

[0020] Figure 5 A schematic diagram of the partial structure of a multi-station pipe end cutting machine Figure 2 ;

[0021] Figure 6 A schematic diagram of the partial structure of a multi-station pipe end cutting machine Figure 3 ;

[0022] In the figure:

[0023] 1 workbench;

[0024] 2 feeding mechanism; 21 guide wheel assembly; 211 guide wheel fixing seat; 212 guide wheel; 213 first driving device; 22 first slide rail assembly; 221 first slide rail; 222 first slide block; 223 first slide plate;

[0025] 3 clamping mechanism; 31 upper clamping die; 32 lower clamping die; 33 supporting column; 34 second driving device;

[0026] 4 cutting mechanism; 41 saw blade fixing seat; 411 third driving device; 42 second slide rail assembly; 421 second slide rail; 422 second slide block; 423 second slide plate; 43 fourth driving device; 44 saw blade; 45 dust collecting box; 451 pipe fixing support; 4511 fixing block; 4512 notch; 4513 channel;

[0027] 5 multi-stage variable diameter pipe end mechanism; 51 third slide rail assembly; 511 third slide rail; 512 third slider; 513 third slide plate; 52 fourth slide rail assembly; 521 fourth slide rail; 522 fourth slider; 523 fourth slide plate; 53 expansion and contraction assembly; 531 expansion fixture; 532 contraction fixture; 533 fifth driving device; 54 flat-mouth assembly; 541 flat-mouth fixture; 542 sixth driving device;

[0028] 6 Mechanical clamps. DETAILED DESCRIPTION

[0029] The following will disclose multiple embodiments of the present invention with drawings. For the purpose of clear description, many practical details will be described together in the following description. However, it should be understood that these practical details should not be used to limit the present invention. In other words, in some embodiments of the present invention, these practical details are not necessary. In addition, in order to simplify the drawings, some conventional structures and components will be depicted in a simple schematic manner in the drawings.

[0030] It should be noted that all directional indications such as up, down, left, right, front, back... in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture as shown in the accompanying drawings. If the specific posture changes, the directional indication will also change accordingly.

[0031] In addition, in the present utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes, and do not specifically refer to the order or sequence, nor are they used to limit the present utility model. They are only used to distinguish components or operations described with the same technical terms, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0032] Embodiment 1

[0033] See also Figure 1 , Figure 1 The overall structure of the multi-station pipe end cutting machine Figure 1 The utility model provides a multi-station pipe end cutting integrated machine for pipe fittings, including a workbench 1, and a feeding mechanism 2, a clamping mechanism 3, a cutting mechanism 4, and a multi-stage variable diameter pipe end mechanism 5 are sequentially fixed on the workbench 1 along a first direction. The overall structure of the device is compact, and the space occupancy rate is low. It integrates automatic fixed-length feeding, multi-stage variable diameter expansion and contraction operations, and automatic cutting of the formed pipe fittings to be processed, which can realize continuous processing of the pipe fittings to be processed, one-time forming, shorten production time, reduce costs, and improve production efficiency.

[0034] To facilitate understanding of this embodiment, direction axes are established, with PA direction being the first direction, PB direction being the second direction, and PC direction being the third direction. The first direction, the second direction, and the third direction are perpendicular to each other, wherein the first direction and the second direction are both parallel to the upper surface of the workbench 1, and the third direction is perpendicular to the upper surface of the workbench 1.

[0035] See also Figure 2 , Figure 2 A schematic diagram of the partial structure of a multi-station pipe end cutting machine Figure 1 The cutting mechanism 4 includes a saw blade fixing seat 41, which is fixed on the workbench 1. A third driving device 411 is fixed on the top of the saw blade fixing seat 41. The saw blade fixing seat 41 is provided with a second slide rail assembly 42 along the third direction. The third driving device 411 drives the second slide rail assembly 42 to move up and down along the third direction.

[0036] Combination Figure 2 and Figure 3 , Figure 3 The overall structure of the multi-station pipe end cutting machine Figure 2 The second slide rail assembly 42 is fixedly connected with a fourth driving device 43 and a saw blade 44 . The fourth driving device 43 drives the saw blade 44 to rotate. A dust collecting box 45 is provided at the bottom of the saw blade 44 fixing seat. A detachable pipe fixing support 451 is provided inside the dust collecting box 45 .

[0037] See also Figure 4 , Figure 4 The pipe fixing support 451 is obtained by the cooperation of two fixing blocks 4511 with notches 4512, the width of the notches 4512 is enough for the saw blade 44 to extend into, and a channel 4513 is provided in the middle of the pipe fixing support 451 for the pipe to pass through.

[0038] A dust collecting box 45 is added to the bottom of the saw blade fixing seat 41, and a detachable pipe fixing support 451 is added inside the dust collecting box 45. The pipe fixing support 451 is obtained by matching two fixing blocks 4511 with notches 4512. The width of the notch 4512 is enough for the saw blade 44 to extend into. A channel 4513 is provided in the middle of the pipe fixing support 451 for the pipe to pass through. When the multi-station pipe end cutting machine is working, the pipe passes through the channel of the pipe fixing support 451, and the third driving device 411 drives the second slide 422 along the third The saw blade 44 moves downward so that it extends from the notch 4512 to saw the pipe. The dust and high-temperature iron filings generated by the sawing fall into the dust collection box 45 from the notch 4512, and will not spread or splash into the environment. When it is necessary to clean the dust and high-temperature iron filings on the pipe fixing support 451, it is also very convenient. Just disassemble the two fixing blocks 4511 with the notch 4512. In addition, the pipe fixing support 451 also has a restraining effect on the cut pipe, which can prevent the pipe from drifting or flying out at the moment of cutting and causing accidental injury to the operator.

[0039] Embodiment 2

[0040] See also Figure 1 The feeding mechanism 2 includes a guide wheel assembly 21 and a first slide rail assembly 22 fixed on the workbench 1. The guide wheel assembly 21 is fixed at the rightmost end of the first slide rail assembly 22 along the first direction. The guide wheel assembly 21 includes a guide wheel fixing seat 211, a guide wheel 212 fixed on the guide wheel fixing seat 211, and a first driving device 213. The first driving device 213 is specifically a stepping motor. The guide wheel fixing seat 211 is fixed on the workbench 1, the guide wheel 212 is fixed inside the guide wheel fixing seat 211, and the first driving device 213 drives the guide wheel 212 to rotate. The first slide rail assembly 22 includes a first slide rail 221, a first slider 222 and a first slide plate 223. The first slide rail 221 is fixed on the workbench 1. The first slider 222 is provided on the first slide rail 221. The first slide plate 223 is fixedly connected to the first slide plate 222. The first slide plate 223 is slidably connected to the first slide rail 221 through the first slider 222.

[0041] During operation, the first driving device 213 drives the guide wheel 212 to rotate continuously and stably. Through the continuous and stable rotation of the guide wheel 212, the pipes on the guide wheel 212 are continuously pushed in the reverse direction, so that the pipes are transported on the first slide rail assembly 22 in an orderly and stable manner.

[0042] Embodiment 3

[0043] See also Figure 1The clamping mechanism 3 includes an upper clamp 31 and a lower clamp 32. The lower clamp 32 is fixed on the first slide 223. The first slide 223 is also provided with a support column 33. A second driving device 34 is fixed on the top of the support column 33. The driving end of the second driving device 34 is fixedly connected to the upper clamp 31. The second driving device 34 drives the upper clamp 31 to move closer to or away from the lower clamp 32.

[0044] During operation, the second driving device 34 drives the upper clamping die 31 away from the lower clamping die 32. The pipe passes through the feeding mechanism 2 and is placed on the lower clamping die 32. The second driving device 34 drives the upper clamping die 31 to approach the lower clamping die 32 until the pipe is clamped. At this time, the clamping mechanism 3 drags the pipe to move on the first slide rail assembly 22.

[0045] Embodiment 4

[0046] See also Figure 5 and Figure 6 , Figure 5 A schematic diagram of the partial structure of a multi-station pipe end cutting machine Figure 2 , Figure 6 A schematic diagram of the partial structure of a multi-station pipe end cutting machine Figure 3 The multi-stage variable diameter pipe end mechanism 5 includes an expansion and contraction assembly 53 and a flat-end assembly 54, both of which are fixed on a fourth slide rail assembly 52, which is arranged along the first direction, and the fourth slide rail assembly 52 is fixed on and slidably connected to the third slide rail assembly 51, which is arranged along the second direction.

[0047] See also Figure 5 The third slide rail assembly 51 includes a third slide rail 511, a third slider 512 and a third slide plate 513. The third slide rail 511 is arranged on the workbench 1 along the second direction. The third slide rail 511 is provided with a third slider 512. The third slider 512 is fixedly connected to the third slide plate 513. The third slide plate 513 is slidably connected to the third slide rail 511 through the third slider 512. The fourth slide rail assembly 52 includes a fourth slide rail 521, a fourth slider 522 and a fourth slide plate 523. The fourth slide rail 521 is arranged on the third slide plate 513 along the first direction. The fourth slide rail 521 is provided with a fourth slider 522. The fourth slider 522 is fixedly connected to the fourth slide plate 523. The fourth slide plate 523 is slidably connected to the fourth slide rail 521 through the fourth slider 522.

[0048] The expansion and shrinking assembly 53 includes a plurality of expansion jigs 531 of different specifications and a plurality of shrinking jigs 532 of different specifications. The plurality of expansion jigs 531 and shrinking jigs 532 are arranged in a matrix as a whole. The expansion jigs 531 and shrinking jigs 532 are fixed on the fourth slide plate 523. The expansion jigs 531 and shrinking jigs 532 are both fixedly connected to the driving end of the fifth driving device 533. The fifth driving device 533 drives the expansion jig 531 and the shrinking jig 532 to perform the expansion process and the shrinking process respectively.

[0049] See also Figure 6 The flat-end assembly 54 includes a plurality of flat-end jigs 541 of different specifications. The flat-end jigs 541 are fixed on the fourth slide plate 523. The flat-end jigs 541 are fixedly connected to the driving end of the sixth driving device 542. The sixth driving device 542 is specifically a rotating motor. The flat-end jig 541 includes a flat-end blade. The sixth driving device 542 drives the flat-end jig 541 to rotate to perform flat-end grinding on the pipe to be processed.

[0050] During the design of the present application, in order to save space and effectively simplify the overall structure of the multi-station pipe end cutting machine, a plurality of expansion jigs 531 and shrinkage jigs 532 of different specifications are arranged in a matrix to make the overall structure of the equipment more compact.

[0051] During operation, the pipe fittings that have been cut will still be fixed in the dust collection box 45 due to their own length. At this time, the positions of the expansion and contraction components 53 and the flat-end components 54 are adjusted by controlling the third slide rail assembly 51 and the fourth slide rail assembly 52, so that the expansion and contraction components 53 are aligned with the pipe fittings, and then the expansion and contraction components 53 and the flat-end components 54 are driven by the fifth drive device 533 to perform the expansion process or the contraction process on the pipe fittings. After the expansion and contraction process of the pipe fittings is completed, the positions of the expansion and contraction components 53 and the flat-end components 54 are adjusted again by controlling the third slide rail assembly 51 and the fourth slide rail assembly 52, so that the flat-end components 54 are aligned with the pipe fittings, and then the flat-end components 54 are driven by the sixth drive device 542 to perform flat-end grinding on the pipe fittings.

[0052] Embodiment 5

[0053] See also Figure 6 A mechanical clamp 6 is also provided on the left side of the multi-stage variable diameter pipe end mechanism 5 along the second direction, and the mechanical clamp 6 is fixed on the fourth slide plate 523.

[0054] After the pipe fitting has completed the expansion and contraction process and the flat-end grinding, the mechanical clamp 6 clamps the pipe fitting and transfers it to a designated position.

[0055] The device can also add an automatic loading and unloading mechanism based on the above design to realize automatic loading and unloading of the pipes to be processed. In this way, the entire processing process of the pipes to be processed, including loading and unloading, fixed-length feeding, multi-stage variable diameter expansion and contraction operation, and cutting, can be fully automated without manual intervention, greatly improving production efficiency.

[0056] In summary, the device uses the above structure to simultaneously complete cutting and pipe end processing of the pipe to be processed, simplifying the processing procedures, shortening the production time, reducing costs, and improving production efficiency; in addition, the overall structure of the device is compact and the space occupancy rate is low; more importantly, the safety performance of the device is greatly improved, and there is no need to worry about dust and high-temperature iron filings spreading into the environment and causing harm to the health of the operator, let alone worrying about the pipe drifting or flying out during the cutting process, causing accidental injury to the operator.

[0057] The above is only an embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the scope of the claims of the present invention.

Claims

1. A multi-station pipe end cutting machine for pipe fittings, characterized in that: include: A workbench (1) is provided with a feeding mechanism (2), a clamping mechanism (3), a cutting mechanism (4) and a multi-stage variable diameter pipe end mechanism (5) fixed thereon in sequence along a first direction; the cutting mechanism (4) comprises a saw blade fixing seat (41), the saw blade fixing seat (41) is fixed on the workbench (1), a third driving device (411) is fixed on the top of the saw blade fixing seat (41), the saw blade fixing seat (41) is provided with a second slide rail assembly (42) along a third direction, the third driving device (411) drives the second slide rail assembly (42) to move up and down along the third direction, and the second slide rail assembly (42) is moved upward and downward. A fourth driving device (43) and a saw blade (44) are fixedly connected, the fourth driving device (43) drives the saw blade (44) to rotate, a dust collecting box (45) is provided at the bottom of the saw blade (44) fixing seat, a detachable pipe fixing support (451) is provided inside the dust collecting box (45), the pipe fixing support (451) is obtained by matching two fixing blocks (4511) provided with notches (4512), the width of the notch (4512) is sufficient for the saw blade (44) to extend into, and a channel (4513) is provided in the middle of the pipe fixing support (451) for the pipe to pass through.

2. The multi-station pipe end cutting integrated machine according to claim 1, characterized in that: The feeding mechanism (2) comprises a guide wheel assembly (21) and a first slide rail assembly (22) fixed on the workbench (1); the guide wheel assembly (21) is fixed to the rightmost end of the first slide rail assembly (22) along a first direction; the guide wheel assembly (21) comprises a guide wheel fixing seat (211), a guide wheel (212) fixed to the guide wheel fixing seat (211), and a first driving device (213); the guide wheel fixing seat (211) is fixed on the workbench (1); the guide wheel (212) is fixed inside the guide wheel fixing seat (211); and the first driving device (213) drives the guide wheel (212) to rotate.

3. The multi-station pipe end cutting integrated machine according to claim 2, characterized in that: The first slide rail assembly (22) comprises a first slide rail (221), a first slider (222) and a first slide plate (223); the first slide rail (221) is fixed on the workbench (1); the first slide rail (221) is provided with a first slider (222); the first slider (222) is fixedly connected to the first slide plate (223); the first slide plate (223) is slidably connected to the first slide rail (221) via the first slider (222).

4. The multi-station pipe end cutting integrated machine according to claim 3, characterized in that: The clamping mechanism (3) comprises an upper clamping die (31) and a lower clamping die (32); the lower clamping die (32) is fixed on the first slide plate (223); a support column (33) is also provided on the first slide plate (223); a second driving device (34) is fixed on the top of the support column (33); a driving end of the second driving device (34) is fixedly connected to the upper clamping die (31); the second driving device (34) drives the upper clamping die (31) to approach or move away from the lower clamping die (32).

5. The multi-station pipe end cutting integrated machine according to any one of claims 1 to 4, characterized in that: The multi-stage variable diameter pipe end mechanism (5) comprises an expanding and contracting mouth assembly (53) and a flat mouth assembly (54), wherein the expanding and contracting mouth assembly (53) and the flat mouth assembly (54) are both fixed on a fourth slide rail assembly (52), wherein the fourth slide rail assembly (52) is arranged along a first direction, wherein the fourth slide rail assembly (52) is fixed on a third slide rail assembly (51) and is slidably connected to the third slide rail assembly (51), wherein the third slide rail assembly (51) is arranged along a second direction.

6. The multi-station pipe end cutting integrated machine according to claim 5, characterized in that: The third slide rail assembly (51) comprises a third slide rail (511), a third slider (512) and a third slide plate (513); the third slide rail (511) is arranged on the workbench (1) along the second direction; the third slider (512) is provided on the third slide rail (511); the third slide plate (513) is fixedly connected to the third slider (512); and the third slide plate (513) is slidably connected to the third slide rail (511) via the third slider (512).

7. The multi-station pipe end cutting integrated machine according to claim 6, characterized in that: The fourth slide rail assembly (52) comprises a fourth slide rail (521), a fourth slider (522) and a fourth slide plate (523); the fourth slide rail (521) is arranged on the third slide plate (513) along the first direction; the fourth slide rail (521) is provided with a fourth slider (522); the fourth slider (522) is fixedly connected to the fourth slider (523); the fourth slide plate (523) is slidably connected to the fourth slide rail (521) via the fourth slider (522).

8. The multi-station pipe end cutting integrated machine according to claim 7, characterized in that: The expansion and contraction assembly (53) comprises a plurality of expansion jigs (531) of different specifications and a plurality of contraction jigs (532) of different specifications. The plurality of expansion jigs (531) and contraction jigs (532) are arranged in a matrix as a whole. The expansion jigs (531) and contraction jigs (532) are fixed on the fourth slide plate (523). The expansion jigs (531) and contraction jigs (532) are both fixedly connected to the driving end of a fifth driving device (533). The fifth driving device (533) drives the expansion jig (531) and contraction jig (532) to perform an expansion process and a contraction process respectively.

9. The multi-station pipe end cutting integrated machine according to claim 7, characterized in that: The flat-end assembly (54) comprises a plurality of flat-end jigs (541) of different specifications. The flat-end jigs (541) are fixed on the fourth slide plate (523). The flat-end jigs (541) are fixedly connected to the driving end of a sixth driving device (542). The sixth driving device (542) drives the flat-end jig (541) to rotate to perform flat-end grinding on the pipe to be processed.

10. The multi-station pipe end cutting integrated machine according to claim 7, characterized in that: A mechanical clamp (6) is also provided on the left side of the multi-stage variable diameter pipe end mechanism (5) along the second direction, and the mechanical clamp (6) is fixed on the fourth slide plate (523).

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