A bimetallic composite pipe finishing apparatus

Abstract

The utility model relates to pipe material processing machinery technical field discloses a kind of bimetallic composite pipe finishing equipment, including equipment base, pipe material support seat assembly, finishing sliding table assembly and rotary finishing assembly. Finishing sliding table assembly is driven by sliding table drive cylinder driving linkage plate and sliding table linkage lever, drives the sliding table mounting plate along slide rail and moves, realizes automatic feed, and rotary finishing assembly utilizes drive motor to drive connecting frame, so that planetary gear is self-rotated under the meshing effect of outer frame inner ring gear, and drive finishing head is modified to pipe material. The utility model utilizes sliding table assembly to realize the automatic quick alignment and fine adjustment of finishing mechanism, reduce labor intensity;And through planetary gear transmission structure, it provides stable and strong cutting power, solves the problem of hard composite pipe modification easily vibrating, insufficient torque.

Description

Technical Field

[0001] This utility model relates to the field of pipe processing machinery technology, and in particular to a bimetallic composite pipe trimming device. Background Technology

[0002] Bimetallic composite pipes are widely used in the petroleum, chemical, and fluid transportation fields due to their excellent corrosion resistance and mechanical strength. During pipeline laying and connection, in order to ensure welding quality or connection sealing, it is usually necessary to perform precision finishing on the pipe end face, such as cutting operations like flattening and chamfering. This requires the finishing equipment to have efficient alignment capabilities and stable power cutting performance.

[0003] However, existing pipe trimming equipment reveals significant structural shortcomings in actual operation. Firstly, regarding the feeding mechanism, traditional trimming devices often employ fixed heads or rely on simple manual screw slides. When dealing with heavy or multi-length bimetallic composite pipes, operators often need to expend considerable physical effort to move the pipes or repeatedly manually crank the handle to adjust the trimming tool position for alignment and feeding. This manual operation method not only results in extremely high labor intensity and low production efficiency but also makes it difficult to precisely control the feeding speed and fine-tuning depth, easily leading to tilting or dimensional errors in the trimmed end face due to human operational instability.

[0004] Secondly, regarding power transmission, bimetallic composite pipes are typically composed of a carbon steel base pipe and a stainless steel or alloy lining, resulting in high overall hardness and significant differences in interlayer cutting characteristics. Most existing dressing equipment uses a simple direct-drive method where the motor shaft directly drives the cutter head. This structure often suffers from insufficient torque output margin when facing high loads or sudden hardness changes in cutting conditions, easily causing severe vibration of the cutter head or even jamming and shutdown. This not only results in rough cutting marks and substandard flatness on the pipe end face but also frequently leads to motor overload damage or cutter chipping, severely impacting equipment reliability and dressing quality.

[0005] Therefore, this utility model proposes a bimetallic composite pipe trimming device to overcome the shortcomings of the prior art. Utility Model Content

[0006] In view of the problems existing in the bimetallic composite pipe trimming equipment, such as the feeding mechanism relying on manual operation leading to high labor intensity, slow feeding speed and difficulty in controlling accuracy, and the power transmission structure mostly using ordinary direct connection method which is prone to vibration and unstable speed due to insufficient torque when dealing with high hardness composite pipe trimming, thus affecting trimming quality and equipment reliability, this utility model aims to provide a bimetallic composite pipe trimming equipment with an improved structure that can effectively solve the above problems.

[0007] This utility model provides a bimetallic composite pipe trimming device, including: a device base, a pipe support assembly fixedly installed on the top surface of the device base, and a trimming slide assembly.

[0008] The trimming slide assembly includes a slide base fixedly connected to the equipment base, a slide rail fixedly installed on the top surface of the slide base along the length direction, a slide guide block slidably connected on the slide rail, and a slide mounting plate fixedly connected to the top of the slide guide block by connecting bolts. A slide drive cylinder is also fixedly installed on the slide base. A linkage plate is fixedly connected to the output end of the slide drive cylinder. A slide linkage rod is fixedly connected to the end of the linkage plate away from the slide drive cylinder. The end of the slide linkage rod away from the linkage plate is fixedly connected to the slide mounting plate. Furthermore, a drive base is fixedly installed on the top surface of the slide mounting plate, and a drive motor is fixedly installed on the drive base. The output end of the drive motor is connected to a rotary dressing assembly. The rotary dressing assembly includes an outer frame fixed on the drive base, and a connecting frame is provided inside the outer frame. One end of the connecting frame is fixedly connected to the drive shaft of the drive motor, and the other end of the connecting frame is rotatably connected to a planetary gear shaft. A planetary transmission gear is fixedly sleeved on the planetary gear shaft, and a dressing head is fixedly connected to the end of the planetary transmission gear away from the connecting frame.

[0009] Preferably, the pipe support assembly includes a support base fixedly connected to the equipment base, a support fixing seat fixedly connected to the top of the support base, and a U-shaped positioning groove opened on the top of the support fixing seat. A pipe support roller is rotatably connected in the positioning groove. Through this structural design, the rolling characteristics of the pipe support roller can effectively reduce the frictional resistance during pipe placement and adjustment, while the U-shaped positioning groove ensures the initial alignment of the pipe axis.

[0010] Preferably, there are two sets of slide rails, which are arranged parallel to each other on both sides of the top surface of the slide base. At least two slide guide blocks are provided and are slidably engaged on the two sets of slide rails. The layout of double rails and multiple guide blocks significantly enhances the stability and anti-tilting ability of the slide mounting plate when carrying heavy trimming components in reciprocating motion.

[0011] Preferably, the slide drive cylinder is located at the central axis of the slide base, and the extension and retraction direction of the slide drive cylinder is parallel to the length direction of the slide rail. This central drive arrangement not only makes full use of the base space, but also ensures that the lines of action of the driving thrust and the guiding resistance coincide, avoiding guide rail wear or movement jamming caused by off-center load torque.

[0012] Preferably, an internal gear ring is fixedly embedded on the inner wall of the outer frame, and the outer peripheral teeth of the planetary transmission gear mesh with the internal gear ring to drive the dressing head to rotate when the connecting frame rotates. Through the meshing transmission between the internal gear ring and the planetary gear, the motor speed is converted into a high-torque self-rotation cutting force, which effectively solves the problem of insufficient power when dressing hard pipes.

[0013] Preferably, the connecting frame is in the form of a disc or a multi-claw disc, and the number of planetary gear shafts is three, which are distributed in an equilateral triangle on the connecting frame. Each planetary gear shaft is connected to a planetary transmission gear. The multi-point evenly distributed transmission structure not only balances the rotational centrifugal force, but also greatly improves the output stability of the cutting torque.

[0014] Preferably, the drive shaft rotates through the rear wall of the outer frame via a bearing and extends into the inner cavity of the outer frame, and the connecting frame is located in the inner cavity of the outer frame. This design ensures the sealing and coaxiality of the transmission components.

[0015] Preferably, the end face of the dressing head is provided with a chamfered cutting edge or a flat cutting edge, and the dressing head is detachably fixed to the end center of the planetary transmission gear by bolts, which facilitates quick replacement of worn tools or change of dressing form according to different process requirements.

[0016] Preferably, the surface of the pipe roller is covered with an anti-slip rubber layer, and both ends of the pipe roller are rotatably mounted on the support fixing seat via bearing seats. The anti-slip layer protects the surface of the pipe and increases auxiliary positioning friction, while the bearing seats ensure the rotational flexibility of the roller under heavy load.

[0017] This utility model has the following beneficial effects: 1. This utility model, by setting up a trimming slide assembly including a slide drive cylinder, a slide linkage rod, and a slide rail, utilizes fluid driving force to drive the trimming mechanism to move along the guide rail via a rigid linkage mechanism. This solves the problem in the prior art where the trimming mechanism mainly relies on manual handling or manual adjustment when aligning and feeding with the pipe, resulting in high labor intensity, slow feed speed, and difficulty in controlling accuracy. It achieves the technical effect that the trimming mechanism can automatically, quickly, and smoothly feed to the end of the pipe, and realize high-precision position fine adjustment during the trimming process, significantly improving processing efficiency and automation level.

[0018] 2. This utility model, by employing a rotary dressing assembly comprising an inner gear ring, a connecting frame, and planetary transmission gears, utilizes the planetary gear transmission principle to transform the single rotational motion of the drive motor into a multi-point meshing, high-torque planetary motion. This solves the problem in existing technologies where ordinary direct-drive structures are prone to vibration, unstable speed, or jamming due to high cutting resistance when dressing high-hardness bimetallic composite pipes. It achieves the technical effects of stable cutting power output, strong impact resistance, and large torque reserve, effectively ensuring the smoothness and finish of the composite pipe end face, while extending the service life of the core components of the equipment.

[0019] 3. This utility model solves the problems in the prior art where pipes are easily slipped and scratched when placed directly on a rigid support, and the axial adjustment friction resistance is large, by setting a pipe support assembly that includes a pipe support roller with an anti-slip rubber layer and is installed in conjunction with a bearing seat. It achieves the technical effect of being able to stably and flexibly support the pipe and greatly reduce the operating resistance when the pipe is assisted in positioning by utilizing rolling friction. Attached Figure Description

[0020] Figure 1 This is a three-dimensional schematic diagram of a bimetallic composite pipe trimming device proposed in this utility model; Figure 2 This is a schematic diagram of the slide base of a bimetallic composite pipe trimming device proposed in this utility model; Figure 3 This is a schematic diagram of the linkage plate of a bimetallic composite pipe trimming device proposed in this utility model. Figure 4 This is a schematic diagram of the outer frame of a bimetallic composite pipe trimming device proposed in this utility model.

[0021] Legend: 1. Equipment base; 2. Pipe support assembly; 201. Pipe roller; 202. Support fixing seat; 203. Support base; 3. Dressing slide assembly; 301. Slide mounting plate; 302. Slide linkage rod; 303. Slide drive cylinder; 304. Linkage plate; 305. Connecting bolt; 306. Slide guide block; 307. Slide rail; 308. Slide base; 4. Drive base; 5. Drive motor; 6. Rotary dressing assembly; 601. Outer frame; 602. Planetary transmission gear; 603. Planetary gear shaft; 604. Connecting frame; 605. Drive shaft; 606. Dressing head. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0023] Example: Please refer to Figures 1 to 4 This utility model provides a bimetallic composite pipe trimming device, which aims to solve the problems of low alignment efficiency and high labor intensity caused by the need for manual handling or manual adjustment of the trimming mechanism in the existing pipe trimming equipment, and the instability or vibration of the power output of ordinary transmission structure when trimming bimetallic composite pipes due to the different hardness of pipes, thus affecting the trimming quality.

[0024] like Figure 1 and Figure 2 As shown, the main structure of the bimetallic composite pipe trimming equipment includes an equipment base 1 and a pipe support assembly 2 fixedly connected to one side of the top surface of the equipment base 1. At the same time, a trimming slide assembly 3 is also fixedly connected to the top surface of the equipment base 1 away from the pipe support assembly 2. The equipment base 1 serves as a stable installation platform for the entire device, providing rigid support for each moving part. The pipe support assembly 2 is mainly used to support and position the bimetallic composite pipe to be processed, ensuring the axial stability of the pipe during processing. The trimming slide assembly 3 serves as the carrier of the feeding mechanism, used to drive the subsequent processing parts to achieve axial reciprocating motion.

[0025] A drive base 4 is fixedly connected to the top surface of the slide mounting plate 301 above the trimming slide assembly 3. A drive motor 5, which provides rotational cutting power, is fixedly installed on the drive base 4 by bolts. The output end of the drive motor 5 is connected to the rotary trimming assembly 6. Through this hierarchical installation structure, the drive motor 5 and the rotary trimming assembly 6 can move as a whole with the movement of the trimming slide assembly 3, thereby realizing automatic approach and trimming of the end face of pipes of different lengths without the need for manual handling and adjustment of the equipment position.

[0026] To ensure the stability and low friction characteristics of the pipe support, the pipe support assembly 2 specifically includes a support base 203 fixedly connected to the equipment base 1. A support fixing seat 202 is fixedly connected to the top of the support base 203. A U-shaped positioning groove is opened on the top of the support fixing seat 202. A pipe roller 201 is rotatably connected in the positioning groove. The surface of the pipe roller 201 is covered with an anti-slip rubber layer to increase friction and protect the surface of the pipe. Both ends of the pipe roller 201 are rotatably mounted on the support fixing seat 202 through bearing seats. Utilizing the rolling characteristics of the pipe roller 201, it is convenient to make a small axial adjustment of the pipe during positioning. At the same time, the height of the support fixing seat 202 is preset or adjustable to ensure that the central axis of the pipe placed on it is kept at the same horizontal height as the rotation central axis of the subsequent rotation trimming assembly 6, thereby ensuring the verticality and flatness of the trimmed section.

[0027] To solve the core technical problem of achieving automatic and rapid feeding and fine-tuning of the trimming mechanism relative to the pipe, the bimetallic composite pipe trimming equipment also includes a trimming slide assembly 3. Furthermore, the trimming slide assembly 3 and the aforementioned equipment base 1 form a stable support relationship, while providing a precise linear guide path for the power mechanism above.

[0028] Please refer to the following carefully. Figure 2 and Figure 3 The core structure is described in detail below: The trimming slide assembly 3 has a slide base 308 that serves as the stator foundation. The slide base 308 is fixedly connected to a specific position on the top surface of the equipment base 1. Two sets of slide rails 307 are arranged parallel to each other along the length of the top surface. The slide rails 307 are usually made of high-strength alloy steel that has been quenched to have excellent wear resistance and load-bearing capacity. At least two slide guide blocks 306 are slidably fitted on each set of slide rails 307. The slide guide blocks 306 have ball circulation grooves or self-lubricating slides that match the cross-sectional shape of the slide rails 307. The top of these slide guide blocks 306 together support a slide mounting plate 301. The bottom surface of the slide mounting plate 301 is fastened by connecting bolts 305 passing through preset holes and screwed into the slide guide blocks 306, thereby constructing a load-bearing platform that can move smoothly and with low resistance in a straight line along the trajectory limited by the slide rails 307.

[0029] To provide the platform with automated feed power and achieve precise position control, a slide drive cylinder 303 is fixedly installed on the slide base 308 at the central axis position between the two sets of slide rails 307. The slide drive cylinder 303 is equipped with either a pneumatic or hydraulic cylinder depending on the load requirements. The axis of motion of its telescopic rod is parallel to the length direction of the slide rail 307 to ensure that the thrust direction is consistent with the guide direction. A linkage plate 304 is fixedly connected to the head of the telescopic rod at the output end of the slide drive cylinder 303. The linkage plate 304 serves as an intermediate adapter for power transmission. A slide linkage rod 302 is fixedly connected to the side of the linkage plate 304 away from the slide drive cylinder 303. The slide linkage rod 302 is designed as a rod-shaped structure with sufficient rigidity. The end extends to the side wall of the slide table mounting plate 301 and is rigidly fixed to the slide table mounting plate 301 by means of threads or welding. In the assembled state, when the slide table drive cylinder 303 performs the extension or retraction action, the axial push and pull force generated is transmitted to the slide table mounting plate 301 without gap through the linkage plate 304 and the slide table linkage rod 302 in sequence, driving the slide table mounting plate 301 and the load above it to perform linear reciprocating motion along the slide table slide rail 307. This structural design with central drive and side rigid traction not only effectively utilizes the internal space layout of the slide table base 308, but also significantly improves the anti-tilt capability and motion stability of the slide table mounting plate 301 during high-speed feeding through the double-rail guide mechanism.

[0030] Based on the above embodiments, the present invention may further include the following preferred technical solutions: As a preferred embodiment, to address the issues of insufficient torque and vibration that easily occur when using ordinary direct-drive systems to dress high-hardness bimetallic composite tubes, the rotary dressing assembly 6 employs a specific planetary gear transmission architecture. Please refer to [the documentation / reference needed]. Figure 4The outer frame 601, serving as the stator housing of the assembly, is rigidly fixed to the side of the drive base 4 near the pipe support assembly 2. An internal gear ring is fixedly embedded in the inner wall of the outer frame 601 via an interference fit or key connection, with the teeth of the internal gear ring facing the center. The drive shaft 605 of the drive motor 5 rotates through the rear wall of the outer frame 601 via bearings and extends to the center of the inner cavity of the outer frame 601. A connecting frame 604 is fixedly connected to the end of the drive shaft 605 located in the inner cavity. The connecting frame 604 preferably adopts a high-strength cast structure in the shape of a disc or a multi-claw disc to ensure rotational inertia balance. The disc surface of the connecting frame 604 faces away from the drive shaft. Three planetary gear shafts 603 are fixedly provided on one side of 605. These three planetary gear shafts 603 are distributed in an equilateral triangle on the circumference of the connecting frame 604. Each planetary gear shaft 603 is fitted with a planetary transmission gear 602 through a needle roller bearing. After assembly, the outer teeth of the three planetary transmission gears 602 are in a tight meshing state with the internal gear ring on the inner wall of the outer frame 601. When the drive motor 5 drives the connecting frame 604 to rotate, the planetary transmission gears 602 rotate at high speed while revolving with the connecting frame 604, driven by the meshing reaction force of the internal gear ring, thereby outputting stable and high torque cutting power.

[0031] As another preferred embodiment, in order to adapt to the processing requirements of different pipe end faces and facilitate tool maintenance, a dressing head 606 is fixedly connected to the center position of the end of each planetary transmission gear 602 away from the connecting frame 604. The dressing head 606 has a disc-shaped flange structure, and a chamfering blade or a flat blade is detachably installed on its end face by bolts. When the equipment is running, the dressing head 606 performs a complex compound rotational motion with the planetary transmission gear 602, which can perform multi-angle cutting and dressing of the pipe end face, effectively eliminating processing dead angles.

[0032] As a further preferred embodiment, in order to prevent surface damage to the pipe during rotational trimming and to improve rotational smoothness, the surface of the pipe roller 201 in the pipe support assembly 2 is covered with a layer of anti-slip rubber. This anti-slip rubber layer not only increases the static friction between the pipe roller 201 and the pipe to assist in positioning, but also buffers the micro-vibrations generated during trimming. At the same time, both ends of the pipe roller 201 are rotatably mounted in the U-shaped positioning groove on the top of the support fixing seat 202 through high-precision bearing seats. This support structure ensures that the pipe roller 201 can still rotate flexibly even under heavy load, reducing the resistance during axial feeding or adjustment of the pipe.

[0033] The working principle of this bimetallic composite pipe trimming device is as follows: When the operator places the bimetallic composite pipe to be processed on the pipe support assembly 2, the pipe roller 201 uses its rolling characteristics to support and assist in positioning the pipe. Then, the equipment control switch is activated, and the slide drive cylinder 303 in the trimming slide assembly 3 receives the signal and performs the extension action. The output end of the slide drive cylinder 303 pushes the linkage plate 304 forward, and then transmits the thrust to the slide mounting plate 301 through the rigidly connected slide linkage rod 302. Under the precise guidance of the slide guide block 306 and the slide rail 307, the slide mounting plate 301 drives the drive base 4, drive motor 5 and rotating trimming assembly 6 above it to move smoothly and quickly toward the end of the pipe, realizing the automated feeding of the trimming mechanism and avoiding the tedious operation of manual handling or manual position adjustment.

[0034] When the dressing mechanism reaches the preset processing position, the drive motor 5 is powered on and started. The rotational power output by the motor is transmitted to the connecting frame 604 inside the rotary dressing assembly 6 through the drive shaft 605. The connecting frame 604 starts to rotate around the central axis in the inner cavity of the outer frame 601, driving the three planetary transmission gears 602 distributed on it to revolve. Since the outer teeth of the planetary transmission gears 602 are always meshed with the internal gear ring fixed on the inner wall of the outer frame 601, the planetary transmission gears 602 are forced to rotate at high speed around their own planetary gear shaft 603 while revolving. This planetary transmission structure converts the high speed of the motor into a large torque cutting force of the dressing head 606. The cutting edge on the dressing head 606 then performs a powerful and stable cutting dressing on the end face of the bimetallic composite tube.

[0035] During the trimming process, if the cutting depth needs to be finely adjusted, the slide drive cylinder 303 can perform a slight extension and retraction movement. Through the slide linkage rod 302, it precisely drives the slide mounting plate 301 to move along the slide rail 307, thereby accurately controlling the contact position between the trimming head 606 and the end face of the pipe. After the trimming operation is completed, the slide drive cylinder 303 performs a retraction action, pulling the slide mounting plate 301 and the entire trimming mechanism back to the initial position along the slide rail 307, so that the operator can unload the processed pipe and perform the next loading. The whole process is controlled by a closed-loop mechanical transmission, ensuring the stability of equipment operation and processing accuracy.

[0036] The above description is only a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A bimetallic composite pipe trimming device, comprising: Equipment base (1), and pipe support assembly (2) fixedly installed on the top surface of the equipment base (1); The equipment base (1) is characterized in that a trimming slide assembly (3) is fixedly installed on the top surface of the equipment base (1). The trimming slide assembly (3) includes a slide base (308) fixedly connected to the equipment base (1). A slide rail (307) is fixedly installed on the top surface of the slide base (308) along the length direction. A slide guide block (306) is slidably connected on the slide rail (307). A slide mounting plate (301) is fixedly connected to the top of the slide guide block (306) by a connecting bolt (305). A slide table drive cylinder (303) is also fixedly installed on the slide table base (308). A linkage plate (304) is fixedly connected to the output end of the slide table drive cylinder (303). A slide table linkage rod (302) is fixedly connected to the end of the linkage plate (304) away from the slide table drive cylinder (303). The end of the slide table linkage rod (302) away from the linkage plate (304) is fixedly connected to the slide table mounting plate (301). A drive base (4) is fixedly installed on the top surface of the slide mounting plate (301), and a drive motor (5) is fixedly installed on the drive base (4). The output end of the drive motor (5) is connected to a rotary trimming assembly (6). The rotary trimming assembly (6) includes an outer frame (601) fixed on the drive base (4). A connecting frame (604) is provided inside the outer frame (601). One end of the connecting frame (604) is fixedly connected to the drive shaft (605) of the drive motor (5). The other end of the connecting frame (604) is rotatably connected to a planetary gear shaft (603). A planetary transmission gear (602) is fixedly sleeved on the planetary gear shaft (603). A trimming head (606) is fixedly connected to the end of the planetary transmission gear (602) away from the connecting frame (604).

2. The bimetallic composite pipe trimming device according to claim 1, characterized in that, The pipe support assembly (2) includes a support base (203) fixedly connected to the equipment base (1). A support fixing seat (202) is fixedly connected to the top of the support base (203). A U-shaped positioning groove is provided on the top of the support fixing seat (202), and a pipe roller (201) is rotatably connected in the positioning groove.

3. The bimetallic composite pipe trimming device according to claim 1, characterized in that, The number of the slide rails (307) is two sets, which are arranged parallel to each other on both sides of the top surface of the slide base (308). The slide guide blocks (306) are provided in at least two sets and are respectively slidably engaged on the two sets of slide rails (307).

4. The bimetallic composite pipe trimming device according to claim 1, characterized in that, The slide drive cylinder (303) is located at the central axis of the slide base (308), and the extension and retraction direction of the slide drive cylinder (303) is parallel to the length direction of the slide rail (307).

5. The bimetallic composite pipe trimming device according to claim 1, characterized in that, An internal gear ring is fixedly embedded on the inner wall of the outer frame (601), and the outer peripheral teeth of the planetary transmission gear (602) mesh with the internal gear ring to drive the dressing head (606) to rotate when the connecting frame (604) rotates.

6. The bimetallic composite pipe trimming device according to claim 1, characterized in that, The connecting frame (604) has a disc-shaped or multi-claw disc-shaped structure. There are three planetary gear shafts (603), which are distributed in an equilateral triangle on the connecting frame (604). Each planetary gear shaft (603) is connected to a planetary transmission gear (602).

7. The bimetallic composite pipe trimming device according to claim 1, characterized in that, The drive shaft (605) rotates through the rear wall of the outer frame (601) via a bearing and extends into the inner cavity of the outer frame (601), and the connecting frame (604) is located in the inner cavity of the outer frame (601).

8. The bimetallic composite pipe trimming device according to claim 1, characterized in that, The end face of the dressing head (606) is provided with a chamfered blade or a flat blade, and the dressing head (606) is detachably fixed to the end center of the planetary gear (602) by bolts.

9. A bimetallic composite pipe trimming device according to claim 2, characterized in that, The surface of the pipe roller (201) is covered with an anti-slip rubber layer, and both ends of the pipe roller (201) are rotatably mounted on the support fixing seat (202) through bearing seats.

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