A bimetallic composite pipe finishing apparatus

Abstract

The present application relates to the technical field of double-metal composite pipe, and discloses a double-metal composite pipe trimming device, which comprises a mounting frame, a transmission assembly is arranged in the mounting frame, a double-metal composite pipe body is conveyed on the transmission assembly, two fixing members and a mounting member are arranged above the mounting frame, and a plurality of fixed plates are arranged on the mounting frame at equal intervals. The inner mounting shell and the outer mounting shell are integrated with a welding assembly and a polishing assembly, welding and polishing are simultaneously performed, the problem of weld slag swelling caused by traditional separate operation is avoided, the rotating clamping system is used to drive the double-metal composite pipe body to rotate, welding and preliminary polishing are simultaneously carried out under slight rotation of the pipe body, swelling is reduced, the positioning assembly accurately positions the pipe body, the welding and polishing positions are matched, the polishing assembly is closely attached to the pipe body through a Z-shaped sliding rod, a top plate and a special-shaped member after welding, the polishing effect is improved, and the time-consuming of secondary trimming is avoided.

Description

Technical Field

[0001] This invention belongs to the field of bimetallic composite pipe technology, specifically, it relates to a bimetallic composite pipe trimming device. Background Technology

[0002] Bimetallic composite pipes are widely used in industrial scenarios such as oil and gas transportation and highly corrosive environments due to the complementary performance advantages of the inner and outer metal layers. Their manufacturing processes often involve technologies such as centrifugal casting and metallurgical fusion.

[0003] Existing equipment often separates welding and grinding, which can easily lead to severe expansion of weld seams and slag during the welding of bimetallic composite pipes, resulting in time-consuming subsequent finishing and grinding operations.

[0004] In view of this, the present invention is proposed. Summary of the Invention

[0005] To solve the above-mentioned technical problems, the basic concept of the technical solution adopted by the present invention is as follows: A bimetallic composite pipe trimming device includes a mounting frame, a transmission assembly within the mounting frame for conveying a bimetallic composite pipe body, two fixing components and a mounting component above the mounting frame, and multiple equidistantly distributed fixing plates on the mounting frame. Each fixing plate has a positioning component at one end of each pair of opposite points, and the positioning component is slidably disposed with the bimetallic composite pipe body. A rotary clamping system is provided on the mounting component to drive the bimetallic composite pipe body to rotate. An inner mounting shell and an outer mounting shell are symmetrically arranged between the two fixing components. A welding component and a grinding component are respectively provided at the bottom of the inner and outer mounting shells. The welding component is used to weld the inner and outer pipes of the clamped bimetallic composite pipe body, and the grinding component is used to grind the bimetallic composite pipe body during and after the welding process.

[0006] In a preferred embodiment of the present invention, the rotary clamping system includes a hydraulic cylinder disposed at the bottom of the mounting component. A driving component is placed at the output end of the hydraulic cylinder. The hydraulic cylinder is used to drive the driving component to move vertically. A clamping component is disposed at the output end of the driving component. The clamping component is used to clamp the bimetallic composite tube body after transmission.

[0007] In a preferred embodiment of the present invention, a servo motor is provided on the fixing member, a threaded rod is provided at the output end of the servo motor, the threaded rod movably passes through the outer mounting housing, a mounting bearing is provided at the end of the threaded rod away from the servo motor, the mounting bearing is provided on the inner wall of the inner mounting housing, and a threaded sleeve is engaged on the threaded rod.

[0008] In a preferred embodiment of the present invention, both the inner and outer mounting housings have rectangular slots at their bottoms, and connecting blocks are slidably provided through the inner cavity of the rectangular slots. An electric push rod and a telescopic rod are respectively provided at the bottom of the two connecting blocks.

[0009] In a preferred embodiment of the present invention, the other end of the electric push rod is provided with a placement member, and the placement member is provided with a welding assembly; the other end of the telescopic rod is provided with a top plate; the inner cavity of the outer mounting housing is provided with a guide rod; a sliding sleeve is sleeved on the guide rod; the bottom of the guide sleeve is connected to a connecting block; and the connecting block is also connected to a threaded sleeve.

[0010] In a preferred embodiment of the present invention, the output end of the electric push rod is provided with a connecting rod, and the end of the connecting rod away from the electric push rod is provided with a placement plate. A movable groove is provided on the placement plate, and a Z-shaped sliding rod is slidably disposed on the movable groove. The end of the Z-shaped sliding rod away from the movable groove is disposed on the top plate.

[0011] In a preferred embodiment of the present invention, two drive grooves are provided at the bottom of the top plate. The two drive grooves are symmetrical to each other. A drive slider is slidably arranged in the inner cavity of each drive groove. The two drive sliders are symmetrical to each other. A return spring is provided on each drive slider, and the other end of the return spring is arranged on the inner wall of the drive groove.

[0012] In a preferred embodiment of the present invention, a C-shaped mounting bracket is connected to one end of each of the two drive sliders away from the drive groove. A grinding component is provided inside the C-shaped mounting bracket. A limiting plate is provided on one side wall of each of the two drive sliders, and the limiting plate is used to block the drive slider.

[0013] In a preferred embodiment of the present invention, a sliding plate is provided at the end of the C-shaped mounting bracket away from the grinding assembly.

[0014] In a preferred embodiment of the present invention, a connector is provided on the outer side wall of the outer mounting housing, and a shaped component is provided at the bottom of the connector. The shaped component is composed of a limiting partition, an inclined surface, and a vertical surface, and the shaped component and the sliding plate are slidably disposed.

[0015] Compared with the prior art, the present invention has the following advantages: This invention integrates welding and grinding components into an inner and outer mounting shell, enabling simultaneous welding and grinding. This avoids the weld slag bulging problem caused by traditional separate operations. A rotating clamping system drives the bimetallic composite pipe body to rotate, allowing welding and initial grinding to proceed simultaneously with slight pipe rotation, reducing bulging. A positioning component precisely positions the pipe body, ensuring a proper fit between welding and grinding. After welding, the grinding component, through Z-shaped sliding rods, a top plate, and other shaped components, closely adheres to the pipe body, improving grinding efficiency and avoiding time-consuming secondary finishing.

[0016] The specific embodiments of the present invention will now be described in further detail with reference to the accompanying drawings. Attached Figure Description

[0017] In the attached diagram: Figure 1 A three-dimensional structural diagram of a bimetallic composite pipe trimming device; Figure 2 A side view of a bimetallic composite pipe trimming device; Figure 3 A schematic diagram of a fastener structure for a bimetallic composite pipe trimming device; Figure 4 A bottom view schematic diagram of the fixing component of a bimetallic composite pipe trimming device; Figure 5 A schematic cross-sectional view of the inner mounting shell of a bimetallic composite pipe trimming device; Figure 6 A schematic diagram of the internal cavity structure of the inner mounting shell of a bimetallic composite pipe trimming device; Figure 7 A bottom view schematic diagram of the threaded rod structure of a bimetallic composite pipe trimming device; Figure 8 This is a schematic cross-sectional view of the top plate of a bimetallic composite pipe trimming device.

[0018] In the picture: 1. Mounting bracket; 11. Transmission assembly; 12. Fastener; 13. Mounting component; 2. Bimetallic composite tube body; 21. Fixing plate; 22. Positioning assembly; 23. Hydraulic cylinder; 24. Drive assembly; 25. Clamping assembly; 3. Inner mounting housing; 31. Outer mounting housing; 311. Rectangular slot; 32. Servo motor; 321. Threaded rod; 322. Mounting bearing; 323. Threaded sleeve; 324. Connecting block; 33. Electric push rod; 34. Guide rod; 341. Sliding sleeve; 342. Telescopic rod; 4. Connecting rod; 41. Placement plate; 411. Moving slide; 412. Z-shaped sliding rod; 5. Placement components; 51. Welding components; 6. Top plate; 61. Drive slide rail; 611. Drive slider; 612. Return spring; 62. Limit plate; 7. C-shaped mounting bracket; 71. Grinding assembly; 8. Connecting parts; 81. Irregularly shaped parts; 811. Limiting partitions; 812. Inclined surfaces; 813. Vertical surfaces; 82. Sliding plates. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate the present invention. Example 1

[0020] like Figures 1 to 8 As shown, a bimetallic composite pipe trimming device includes a mounting frame 1, a transmission component 11 inside the mounting frame 1, a bimetallic composite pipe body 2 being conveyed on the transmission component 11, two fixing members 12 and a mounting member 13 being arranged above the mounting frame 1, and multiple equidistantly distributed fixing plates 21 being arranged on the mounting frame 1, each fixing plate 21 having a positioning component 22 at one end opposite to each other, and the positioning component 22 and the bimetallic composite pipe body 2 being slidably arranged; a rotary clamping system is provided on the mounting member 13, which is used to drive the bimetallic composite pipe body 2 to rotate; an inner mounting shell 3 and an outer mounting shell 31 are arranged between the two fixing members 12, the inner mounting shell 3 and the outer mounting shell 31 being symmetrical to each other, and a welding component 51 and a grinding component 71 being respectively arranged at the bottom of the inner mounting shell 3 and the outer mounting shell 31, the welding component 51 being used to weld the inner and outer pipes of the clamped bimetallic composite pipe body 2, and the grinding component being used to grind the bimetallic composite pipe body 2 during the welding process and after welding. By integrating the welding assembly 51 and the grinding assembly 71 into the inner mounting housing 3 and the outer mounting housing 31, welding and grinding can be carried out simultaneously, avoiding the weld slag bulging problem caused by traditional separate operations. With the help of the rotary clamping system to drive the bimetallic composite pipe body 2 to rotate, welding and preliminary grinding can be carried out simultaneously with slight rotation of the pipe body, reducing the occurrence of bulging. The positioning assembly 22 accurately positions the pipe body to ensure that the welding and grinding positions are matched. After welding, the grinding assembly 71 closely fits the pipe body through structures such as the Z-shaped sliding rod 412, the top plate 6 and the irregular part 81, improving the grinding effect and avoiding the time-consuming secondary repair.

[0021] like Figures 1 to 8As shown, in a specific embodiment, the rotary clamping system includes a hydraulic cylinder 23, which is located at the bottom of the mounting component 13. A drive assembly 24 is placed at the output end of the hydraulic cylinder 23. The hydraulic cylinder 23 is used to drive the drive assembly 24 to move vertically. A clamping assembly 25 is provided at the output end of the drive assembly 24. The clamping assembly 25 is used to clamp the bimetallic composite pipe body 2 after transmission. In this configuration, the vertical driving force provided by the hydraulic cylinder 23, combined with the rotation function of the drive assembly 24 and the clamping action of the clamping assembly 25, enables precise positioning and rotational drive of the bimetallic composite pipe body 2, providing a stable clamping foundation for subsequent welding and grinding processes, and ensuring that the pipe does not shift during the finishing process. Example 2

[0022] The difference between the above embodiments and this embodiment is that: Figures 1 to 8 As shown, a bimetallic composite tube trimming device includes a servo motor 32 mounted on a fixing component 12. A threaded rod 321 is mounted at the output end of the servo motor 32, movably penetrating the outer mounting housing 31. A mounting bearing 322 is mounted at the end of the threaded rod 321 away from the servo motor 32, and the mounting bearing 322 is located on the inner wall of the inner mounting housing 3. A threaded sleeve 323 is engaged with the threaded rod 321. In this configuration, the servo motor 32 provides precise rotational power. Through the meshing transmission between the threaded rod 321 and the threaded sleeve 323, combined with the limiting support of the mounting bearing 322, the threaded sleeve 323 can be driven to move smoothly horizontally. This, in turn, drives the subsequent welding assembly 51 and grinding assembly 71 to precisely approach or move away from the port of the bimetallic composite tube body 2, achieving precise adjustment of the trimming position.

[0023] like Figures 1 to 8 As shown, in a specific embodiment, both the inner mounting housing 3 and the outer mounting housing 31 have rectangular slots 311 at their bottoms, and connecting blocks 324 are slidably disposed through the inner cavity of the rectangular slots 311. Electric push rods 33 and telescopic rods 342 are respectively disposed at the bottom of the two connecting blocks 324. In this configuration, the rectangular slots 311 provide sliding guidance for the connecting blocks 324, ensuring that the connecting blocks 324 drive the electric push rods 33 and telescopic rods 342 to move stably in the horizontal direction, avoiding deviation that could cause welding and grinding positional errors, while simultaneously achieving synchronous displacement adjustment of the welding assembly 51 and the grinding assembly 71.

[0024] like Figures 1 to 8As shown, further, the other end of the electric push rod 33 is provided with a placement part 5, and the placement part 5 is provided with a welding assembly 51. The other end of the telescopic rod 342 is provided with a top plate 6. The inner cavity of the outer mounting housing 31 is provided with a guide rod 34, and a sliding sleeve 341 is sleeved on the guide rod 34. The bottom of the guide sleeve 341 is connected to the connecting block 324, and the connecting block 324 is also connected to the threaded sleeve 323. In this configuration, the guide rod 34 cooperates with the sliding sleeve 341 to provide secondary guiding support for the horizontal movement of the connecting block 324, thereby enhancing the stability of movement; the telescopic rod 342 cooperates with the electric push rod 33 to realize the synchronous displacement of the top plate 6, ensuring the consistency of displacement between the welding assembly 51 and the grinding assembly 71, and improving the process coordination.

[0025] like Figures 1 to 8 As shown, further, the output end of the electric push rod 33 is provided with a connecting rod 4, and the end of the connecting rod 4 away from the electric push rod 33 is provided with a placement plate 41. The placement plate 41 has a movable slide groove 411, and a Z-shaped sliding rod 412 is slidably arranged on the movable slide groove 411. The end of the Z-shaped sliding rod 412 away from the movable slide groove 411 is provided on the top plate 6. In this configuration, the connecting rod 4 transmits the vertical driving force of the electric push rod 33, and the movable slide groove 411 provides horizontal sliding space for the Z-shaped sliding rod 412, realizing the linkage adjustment of the welding assembly 51 and the grinding assembly 71. During the welding stage, the two are synchronously attached to the pipe. After welding, the welding assembly 51 is reset first, and the grinding assembly 71 remains in the attached state to continue the finishing, improving the efficiency of process connection. Example 3

[0026] The difference between the above embodiments and this embodiment is that: Figures 1 to 8 As shown, a bimetallic composite pipe trimming device has two symmetrical drive grooves 61 at the bottom of the top plate 6. Each drive groove 61 has a slidably mounted drive slider 611 within its inner cavity. Each drive slider 611 is also symmetrical, and each drive slider 611 is equipped with a return spring 612, with the other end of the return spring 612 mounted on the inner wall of the drive groove 61. In this configuration, the drive grooves 61 provide a sliding trajectory for the drive sliders 611, and the return springs 612 provide an elastic return force for the drive sliders 611. This design adapts to bimetallic composite pipe bodies 2 of different diameters, ensuring that the grinding assembly 71 always adheres to the pipe surface while avoiding excessive compression that could damage the pipe.

[0027] like Figures 1 to 8As shown, in a specific embodiment, each of the two drive sliders 611 has a C-shaped mounting bracket 7 connected to one end away from the drive groove 61. A grinding assembly 71 is housed within the C-shaped mounting bracket 7. A limiting plate 62 is provided on one side wall of each of the two drive sliders 611 to block the drive sliders 611. In this configuration, the C-shaped mounting bracket 7 provides a stable mounting carrier for the grinding assembly 71, ensuring that the assembly does not loosen during grinding. The limiting plate 62 restricts the maximum sliding stroke of the drive sliders 611, preventing excessive stretching or compression of the return spring 612, and also preventing excessive contact between the grinding assembly 71 and the pipe, thus avoiding over-grinding.

[0028] like Figures 1 to 8 As shown, a sliding plate 82 is further provided at the end of the C-shaped mounting bracket 7 away from the grinding assembly 71. In this configuration, the sliding plate 82 serves as the transmission medium between the C-shaped mounting bracket 7 and the irregular part 81. Through sliding engagement with the irregular part 81, the vertical displacement is converted into the horizontal clamping force of the grinding assembly 71, thereby improving the grinding fit.

[0029] like Figures 1 to 8 As shown, further, a connector 8 is provided on the outer wall of the outer mounting housing 31, and a shaped component 81 is provided at the bottom of the connector 8. The shaped component 81 is composed of a limiting partition 811, an inclined surface 812, and a vertical surface 813. The shaped component 81 and the sliding plate 82 are slidably disposed. In this configuration, the connector 8 realizes the fixed installation of the shaped component 81, the inclined surface 812 of the shaped component 81 is used to guide the horizontal movement of the sliding plate 82, so that the grinding assembly 71 gradually presses against the bimetallic composite tube body 2, the vertical surface 813 is used to limit the displacement of the sliding plate 82, and the limiting partition 811 prevents the sliding plate 82 from detaching from the shaped component 81, ultimately realizing the precise pressing and resetting of the grinding assembly 71.

[0030] The implementation principle of the bimetallic composite pipe trimming device of the present invention is as follows: First, when trimming the bimetallic composite pipe, the worker places the bimetallic composite pipe body 2 onto the transmission assembly 11 and then transmits the bimetallic composite pipe body 2 to the trimming position. Then, the worker controls the operation of the hydraulic cylinder 23, which drives the drive assembly 24 to move vertically downward. By controlling the operation of the electric slide rail on the mounting part 13, the worker can move the hydraulic cylinder 23, drive assembly 24, and clamping assembly 25 horizontally. Then, the worker controls the operation of the drive assembly 24, which drives the clamping assembly 25 to rotate until the clamping assembly 25 enters the inner cavity of the bimetallic composite pipe body 2. Finally, the worker controls the operation of the clamping assembly 25, which clamps the placed bimetallic composite pipe body 2. Finally, the worker controls the operation of the drive assembly 24, which allows the bimetallic composite pipe body 2 to rotate. When the bimetallic composite tube body 2 is clamped, the operator controls the servo motor 32 to run. Therefore, the servo motor 32 can drive the threaded rod 321 to rotate. When the threaded rod 321 rotates, it can drive the threaded sleeve 323 to move horizontally with the assistance of the rectangular slot 311 opened at the bottom of the inner mounting housing 3 and the connecting block 324 (because the connecting block 324 is slidably set with the rectangular slot 311 and is connected to the threaded sleeve 323, thus ensuring that the threaded sleeve 323 can move horizontally). When the threaded sleeve 323 and the connecting block 324 move horizontally, they can drive the welding assembly 51 and the grinding assembly 71 to move, thus allowing the welding assembly 51 and the grinding assembly 71 to approach the port of the bimetallic composite tube body 2. When the welding assembly 51 and the grinding assembly 71 are located above the port of the bimetallic composite tube body 2, the electric push rod 33 is controlled to move, thus driving the welding assembly 51 downward and the grinding assembly 71 downward, so that the welding assembly 51 and the grinding assembly 71 are respectively attached to the port of the bimetallic composite tube body 2. Then, the welding assembly 51 and the grinding assembly 71 are controlled to move, so that the welding assembly 51 can weld the inner and outer tubes of the bimetallic composite tube body 2, and the grinding assembly 71 can perform preliminary grinding and trimming on the welded position (during welding and grinding, the bimetallic composite tube body 2 is in a slightly rotating state, specifically the rotation described above: the drive assembly 24 is controlled to move, so that the bimetallic composite tube body 2 can rotate). After welding is completed, the electric push rod 33 is reset, which in turn drives the welding assembly 51 to reset. When the welding assembly 51 moves upward, it drives the placement plate 41 to move vertically. However, the Z-shaped sliding rod 412, which is slidably installed inside the placement plate 41, cannot move vertically upward at this time (because when the placement plate 41 moves upward, the Z-shaped sliding rod 412 is always moving vertically downward under the gravity of the grinding assembly 71, and the grinding assembly 71 has a sliding plate 82 on one side, which is located at the bottom of the irregular part 81. This results in the Z-shaped sliding rod 412 being located in the middle area of ​​the moving groove 411 opened at the placement plate 41). Therefore, the grinding assembly 71 remains stationary until the welding assembly 51 leaves the bimetallic part. At the port of the composite tube body 2, when the welding assembly 51 continues to move vertically upward, its Z-shaped sliding rod 412 contacts the bottom of the moving slide groove 411, thus allowing the Z-shaped sliding rod 412 to rise, thereby allowing the top plate 6 to rise, and thus allowing the grinding assembly 71 to rise. The sliding plate 82 at the rear end of the C-shaped mounting bracket 7 set at the grinding assembly 71 moves vertically. When the sliding plate 82 moves vertically, it can move forward on the inclined surface 812 in the irregular part 81, thereby allowing the grinding assembly 71 to fit tightly with the bimetallic composite tube body 2, thus making the grinding efficiency higher and ensuring the finishing efficiency. When the sliding plate 82 moves to the vertical surface 813 set at the irregular part 81, it can allow the grinding assembly 71 to leave the port of the bimetallic composite tube body 2.

[0031] Therefore, by integrating the welding assembly 51 and the grinding assembly 71 into the inner mounting housing 3 and the outer mounting housing 31, welding and grinding can be carried out simultaneously, avoiding the weld slag bulging problem caused by traditional separate operations. With the help of the rotating clamping system to drive the bimetallic composite pipe body 2 to rotate, welding and preliminary grinding can be carried out simultaneously with the slight rotation of the pipe body, reducing the occurrence of bulging. The positioning assembly 22 (which has rotatable balls on the surface in contact with the bimetallic composite pipe body 2) accurately positions the pipe body, ensuring that the welding and grinding positions are matched. After welding, the grinding assembly 71 fits tightly to the pipe body through the Z-shaped sliding rod 412, the top plate 6 and the irregular part 81, etc., improving the grinding effect and avoiding the time-consuming secondary finishing.

[0032] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A bimetallic composite pipe trimming device, comprising a mounting frame (1), characterized in that: The mounting frame (1) is provided with a transmission component (11), on which a bimetallic composite tube body (2) is transported. Two fixing parts (12) and a mounting part (13) are provided above the mounting frame (1). The mounting frame (1) is also provided with a plurality of fixing plates (21) that are equidistantly distributed. Each fixing plate (21) has a positioning component (22) at one end opposite to each other, and the positioning component (22) and the bimetallic composite tube body (2) are slidably disposed. The mounting component (13) is provided with a rotary clamping system, which is used to drive the bimetallic composite tube body (2) to rotate; An inner mounting housing (3) and an outer mounting housing (31) are provided between the two fixing members (12). The inner mounting housing (3) and the outer mounting housing (31) are symmetrical to each other. A welding assembly (51) and a grinding assembly (71) are respectively provided at the bottom of the inner mounting housing (3) and the outer mounting housing (31). The welding assembly (51) is used to weld the inner and outer tubes of the clamped bimetallic composite tube body (2). The grinding assembly is used to grind the bimetallic composite tube body (2) during the welding process and after welding.

2. The bimetallic composite pipe trimming device according to claim 1, characterized in that, The rotary clamping system includes a hydraulic cylinder (23), which is located at the bottom of the mounting component (13). A drive assembly (24) is placed at the output end of the hydraulic cylinder (23). The hydraulic cylinder (23) is used to drive the drive assembly (24) to move vertically. A clamping assembly (25) is provided at the output end of the drive assembly (24). The clamping assembly (25) is used to clamp the bimetallic composite tube body (2) after transmission.

3. The bimetallic composite pipe trimming device according to claim 1, characterized in that, A servo motor (32) is provided on the fixing member (12). A threaded rod (321) is provided at the output end of the servo motor (32). The threaded rod (321) is movably inserted through the outer mounting housing (31). A mounting bearing (322) is provided at the end of the threaded rod (321) away from the servo motor (32). The mounting bearing (322) is provided on the inner wall of the inner mounting housing (3). A threaded sleeve (323) is engaged on the threaded rod (321).

4. The bimetallic composite pipe trimming device according to claim 3, characterized in that, Both the inner mounting housing (3) and the outer mounting housing (31) have rectangular slots (311) at their bottoms, and a connecting block (324) is slidably provided through the inner cavity of the rectangular slot (311). An electric push rod (33) and a telescopic rod (342) are respectively provided at the bottom of the two connecting blocks (324).

5. The bimetallic composite pipe trimming device according to claim 4, characterized in that, The electric push rod (33) has a placement part (5) at the other end, and a welding assembly (51) is provided on the placement part (5). The telescopic rod (342) has a top plate (6) at the other end. The outer mounting housing (31) has a guide rod (34) in its inner cavity. A sliding sleeve (341) is sleeved on the guide rod (34). The bottom of the guide sleeve (241) is connected to a connecting block (324), and the connecting block (324) is also connected to a threaded sleeve (323).

6. The bimetallic composite pipe trimming device according to claim 5, characterized in that, The output end of the electric push rod (33) is provided with a connecting rod (4). The end of the connecting rod (4) away from the electric push rod (33) is provided with a placement plate (41). A movable slide groove (411) is provided on the placement plate (41). A Z-shaped sliding rod (412) is slidably provided on the movable slide groove (411). The end of the Z-shaped sliding rod (412) away from the movable slide groove (411) is provided on the top plate (6).

7. The bimetallic composite pipe trimming device according to claim 6, characterized in that, The top plate (6) has two drive slide grooves (61) at the bottom. The two drive slide grooves (61) are symmetrical to each other. The inner cavity of each drive slide groove (61) is slidably provided with a drive slider (611). The two drive sliders (611) are symmetrical to each other. Each drive slider (611) is provided with a return spring (612), and the other end of the return spring (612) is provided on the inner wall of the drive slide groove (61).

8. The bimetallic composite pipe trimming device according to claim 7, characterized in that, The two drive sliders (611) are connected to a C-shaped mounting bracket (7) at one end away from the drive groove (61). A grinding component (71) is provided inside the C-shaped mounting bracket (7). A limiting plate (62) is provided on one side wall of the two drive sliders (611). The limiting plate (62) is used to block the drive sliders (611).

9. A bimetallic composite pipe trimming device according to claim 8, characterized in that, The C-shaped mounting bracket (7) has a sliding plate (82) at the end away from the grinding assembly (71).

10. A bimetallic composite pipe trimming device according to claim 1, characterized in that, The outer wall of the outer mounting housing (31) is provided with a connector (8), and the bottom of the connector (8) is provided with a shaped part (81). The shaped part (81) is composed of a limiting partition (811), an inclined surface (812) and a vertical surface (813). The shaped part (81) and the sliding plate (82) are slidably arranged.

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