In-pipe cutting machine tool and cutting method thereof

Abstract

The present invention belongs to the technical field of pipe cutting machines, and in particular relates to a pipe cutting machine and a cutting method thereof. The pipe cutting machine comprises a processing column, a rectangular rod is slidably connected to the processing column, a cutting part is fixed to the rectangular rod, the processing column can slide left and right along the horizontal direction, a cutter is connected to the cutting part, a stepped circular plate is fixed to the processing column, a rotating part is rotatably connected to the stepped circular plate, a plurality of transmission inclined rods are fixed to the rotating part, and a support part is slidably connected to the stepped circular plate. The pipe cutting machine is used for a cutting method for cutting pipes, and the method comprises the following steps: Step 1: a clamp that can clamp and fix the pipe and has its own power source to drive the pipe to rotate is used to clamp the pipe to be cut; the cutting area can be stably supported when performing pipe cutting on composite pipes to ensure the notch cutting effect.

Description

Technical Field

[0001] The present invention belongs to the technical field of pipe cutting machines, and in particular relates to an in-pipe cutting machine and a cutting method thereof. Background Art

[0002] When machining pipes using machine tools, for example, when notching the inner pipe of a double-layer pipe or a composite pipe coated with other materials, the existing technology typically uses a "single-layer pipe cutting → composite processing" process separation mode. This can easily lead to accumulated assembly errors and increase process time, resulting in certain inconveniences. However, if cutting is performed inside the pipe, the above problems can be effectively solved.

[0003] However, when cutting inside the pipe, if only the traditional clamp with the external clamping method commonly used in the prior art is adopted, the point of application of the clamping force is too far away from the cutting area, and the cutting area inside the pipe cannot be supported, which can easily cause the pipe to shift or vibrate during the cutting process, thereby affecting the cutting effect of the notch. Therefore, it is impossible to stably support the cutting area when cutting inside the composite pipe to ensure the notch cutting effect. Summary of the Invention

[0004] In view of this, the technical problem to be solved by the present invention is to provide an in-pipe cutting machine and a cutting method thereof, which can stably support the cutting area when performing in-pipe cutting on composite pipes to ensure the notch cutting effect.

[0005] A pipe cutting machine includes a processing column, a rectangular rod is slidably connected to the processing column, a cutting part is fixed to the rectangular rod, the processing column can slide left and right in the horizontal direction, a cutter is connected to the cutting part, a stepped circular plate is fixed to the processing column, a rotating part is rotatably connected to the stepped circular plate, a plurality of transmission oblique rods are fixed to the rotating part, a supporting part is slidably connected to the stepped circular plate, a first compression spring is fixed between each supporting part and the stepped circular plate, and the plurality of transmission oblique rods can respectively drive the plurality of supporting parts to slide.

[0006] Each of the supporting parts is fixedly connected to a supporting block.

[0007] The machine also comprises a C-shaped block which is slidably connected to the processing column. One end of a hinged rod is hinged to the C-shaped block, and the other end of the hinged rod is hinged to the cutting part.

[0008] The processing column is provided with a plurality of scale marks, a display ring is slidably connected to the processing column, a connecting rod is fixed to the display ring, a contact plate is fixed to the connecting rod, an adjustment plate is slidably connected to the contact plate, and a third compression spring is fixed between the display ring and the processing column.

[0009] The method for cutting pipes using the in-pipe cutting machine comprises the following steps:

[0010] Step 1: Use a clamp that can clamp and fix the pipe and has its own power source to drive the pipe to rotate to clamp the pipe to be cut;

[0011] Step 2: Slide the connecting frame on the slide rail until the cutting part moves to the area to be cut;

[0012] Step 3: Operate the rotating part to rotate until the multiple supporting parts abut against the inner wall of the pipe;

[0013] Step 4: Operate the C-shaped block to slide on the processing column, and according to production requirements, slide the connecting frame on the slide rail and cooperate with the clamp to drive the pipe to rotate to complete the notch cutting;

[0014] Step 5: Remove the pipe and complete the internal processing of the pipe.

[0015] The beneficial effects of this equipment are: it can provide stable support for the cutting area when cutting inside the composite pipe to ensure the notch cutting effect, and can perform inside-pipe cutting operations on the inner wall of the composite pipe according to production needs after the composite pipe is formed, greatly simplifying the difficulty of assembling composite pipes with each other or with other materials, and at the same time can adapt to sudden production needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention will be further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0017] Figure 1 and Figure 2 This is a schematic diagram of the overall structure of a pipe cutting machine tool;

[0018] Figure 3 Schematic diagram of the structure of the slide rail;

[0019] Figure 4 A schematic diagram showing the cross-sectional structure of the ring;

[0020] Figure 5 It is a structural diagram of the C-type block;

[0021] Figure 6 Schematic diagram of the cross-sectional structure of the cutting part;

[0022] Figure 7 Schematic diagram of the structure of the processing column;

[0023] Figure 8 It is a structural diagram of a stepped circular plate;

[0024] Figure 9 Schematic diagram of the structure of the support block;

[0025] Figure 10 It is a structural schematic diagram of the rotating part;

[0026] Figure 11 Schematic diagram of the structure of the pressure column;

[0027] Figure 12 Schematic diagram of the structure of the support part. DETAILED DESCRIPTION

[0028] A pipe cutting machine includes a processing column 101, which is slidably connected to a rectangular rod 401, a cutting portion 303 is fixed to the rectangular rod 401, and a cutter is connected to the cutting portion 303. The processing column 101 is fixed to a stepped circular plate 501, a rotating portion 601 is rotatably connected to the stepped circular plate 501, a gear ring 602 is fixed to the rotating portion 601, a first motor is fixed to the stepped circular plate 501, a gear is fixed to the output shaft of the first motor, the gear is meshed with the gear ring 602, a plurality of transmission oblique rods 604 are fixed to the rotating portion 601, a support portion 502 is slidably connected to the stepped circular plate 501, a first compression spring is fixed between each support portion 502 and the stepped circular plate 501, and the plurality of transmission oblique rods 604 can respectively drive the plurality of support portions 502 to slide.

[0029] The pipe to be cut is clamped by a clamp that can clamp and fix the pipe and has its own power source to drive the pipe to rotate. Then, the processing column 101 is operated to slide horizontally toward the pipe, so that the processing column 101 is gradually inserted into the inner wall of the pipe until the cutter on the cutting part 303 is moved to a position that can coincide with the area to be cut of the pipe. Then, the pipe is driven by the clamp and continuously rotated. During this process, the rectangular rod 401 is slid on the processing column 101, thereby driving the cutter to move, so that the cutter gradually contacts the inner wall of the pipe. Then, as the pipe continues to rotate, the cutter is used to perform a notch cutting operation on the inside of the pipe, thereby meeting production needs and performing an inner-pipe cutting operation on double-layer pipes or composite pipes with other materials wrapped on the surface without touching the outer layer material, thereby achieving an inner-pipe cutting effect.

[0030] The above-mentioned fixture is a conventional technical means in the existing machine tool, which is well known to those skilled in the art and will not be described in detail here;

[0031] After the processing column 101 slides to a position where the cutter can coincide with the area to be cut of the pipe, the output shaft of the first motor is rotated, thereby rotating the gear transmission ring 602, causing the rotating part 601 to rotate on the stepped circular plate 501, and then using multiple transmission inclined rods 604 to toggle the multiple support parts 502 to slide, so that the multiple support parts 502 synchronously overcome the elastic force of the first compression spring to slide away from the center of the stepped circular plate 501, until the multiple support parts 502 abut against the inner wall of the pipe, then the pipe is rotated and the rectangular rod 401 is slid to complete the subsequent cutting effect. In this process, the abutment arrangement of the multiple support parts 502 can support the inner wall of the composite pipe, ensuring that the composite pipe does not shake during cutting, thereby ensuring stability during the pipe cutting process and ensuring the notch forming effect, thereby avoiding the situation where the inner wall of the composite pipe is offset during the pipe cutting process due to the clamping part being too far away from the processing part or the traditional clamp only being able to clamp the outer side of the composite pipe;

[0032] The rotation of the rotating part 601 can synchronously drive the multiple supporting parts 502 to slide and achieve the abutment effect, thereby ensuring the stability of the supporting effect while reducing the power source required for subsequent operation and maintenance, bringing convenience to actual use;

[0033] This equipment can perform internal cutting operations on the inner wall of the composite pipe according to production needs after the composite pipe is formed. Compared with the traditional external cutting of individual pipes first and then subsequent composite operations, this application can greatly simplify the difficulty of assembling composite pipes with each other or with other materials. At the same time, it can also adapt to sudden production needs. When there is a sudden need to form a notch in the composite pipe, the original composite pipe production line can be used without interrupting and modifying the production line, and without adding additional cutting steps in the middle. The composite pipe only needs to be formed normally according to the original production line, and then the composite pipe is sent to this equipment for internal cutting operations after the composite pipe is formed to meet production needs, and the stability of the notch forming is guaranteed by multiple support parts 502.

[0034] A supporting block 503 is fixedly connected to each supporting portion 502 .

[0035] When the multiple support parts 502 slide, the multiple support blocks 503 will slide synchronously with the multiple support parts 502, so that the multiple support blocks 503 can also rest on the inner wall of the pipe. The multiple support parts 502 can rest on the inner wall of the pipe on the left side of the cutter, and the multiple support blocks 503 can rest on the inner wall of the pipe on the right side of the cutter. Then, through the cooperation of the multiple support parts 502 and the multiple support blocks 503, it is further ensured that the cutter can perform stable cutting operations on the pipe, thereby ensuring the normal forming effect of the notch in the pipe.

[0036] The support portion 502 and support block 503 respectively abut the inner wall of the pipe on the left and right sides of the cutter, forming a symmetrically distributed support force field. This offsets the cutting reaction force and prevents axial deviation of the pipe caused by unilateral force. This effectively reduces vibration amplitude when processing thin-walled pipes. The dual support points on both sides of the cutter effectively suppress circumferential vibration and radial deformation of the pipe during cutting.

[0037] It also includes a C-shaped block 301 slidably connected to the processing column 101, one end of a hinged rod 302 is hinged on the C-shaped block 301, and the other end of the hinged rod 302 is hinged on the cutting part 303. A second motor is fixedly connected to the processing column 101, and a screw A is fixedly connected to the output shaft of the second motor. The screw A is threadedly connected to the C-shaped block 301.

[0038] When it is necessary to slide the rectangular rod 401 so that the cutter contacts the inner wall of the pipe, the second motor drive screw A rotates, causing the C-shaped block 301 to slide on the processing column 101, and then the C-shaped block 301 drives one end of the hinged rod 302 to slide left and right in the horizontal direction synchronously, so that the other end of the hinged rod 302 drives the cutting part 303 to slide in the front-back direction, and then the cutting part 303 drives the rectangular rod 401 to slide on the processing column 101, completing the subsequent grooving effect;

[0039] The C-shaped block 301 is provided so that the cutting unit 303 can be driven to move by the C-shaped block 301, without integrating the power source between the rectangular rod 401 and the processing column 101. This provides the cutting unit 303 with a larger movable stroke, and is suitable for performing in-pipe cutting operations on pipes of various sizes.

[0040] At the same time, the sliding path of the C-shaped block 301 is parallel to the axis of the processing column 101, and cooperates with the guide groove of the rectangular rod 401 to form a three-point contact support system to prevent the cutter from being subjected to excessive force during processing, causing the rectangular rod 401 to deviate.

[0041] The processing column 101 is provided with a plurality of scale marks 102, a display ring 203 is slidably connected to the processing column 101, a connecting rod 202 is fixed to the display ring 203, a contact plate 201 is fixed to the connecting rod 202, an adjustment plate 204 is slidably connected to the contact plate 201, a first electric push rod that can push the adjustment plate 204 to slide is fixed to the contact plate 201, and a third compression spring is fixed between the display ring 203 and the processing column 101.

[0042] When the processing column 101 is slid and the cutter is moved to the cutting area, when the device is inserted into the pipe, the contact plate 201 will contact the pipe synchronously, and as the subsequent processing column 101 continues to slide, the display ring 203 will gradually overcome the elastic force of the third compression spring on the processing column 101 and slide adaptively, thereby causing the scale mark 102 corresponding to the display ring 203 to change. The staff can accurately judge the distance that the processing column 101 extends into the pipe according to the correspondence between the display ring 203 and the scale mark 102, so as to stop moving the processing column 101 in time when the cutter moves to the cutting area, and perform subsequent cutting operations, thereby using the reference of the scale mark 102 to further ensure that the notch cutting operation is carried out stably according to production requirements, avoiding the occurrence of notch cutting deviations due to the small space in the pipe and the inability of the staff to directly observe.

[0043] The setting of the adjustment plate 204 allows, in actual use, if the diameter of the pipe is too large and the contact plate 201 cannot contact the end face of the pipe wall, the adjustment plate 204 can be operated to slide on the contact plate 201, thereby ensuring that the contact plate 201 can always contact the end face of the pipe wall, thereby ensuring the subsequent depth display effect.

[0044] The display ring 203 cooperates with the third compression spring, and through the physical contact when the processing column 101 slides, the displacement is converted into a visual numerical value of the scale mark 102, which can achieve depth positioning accuracy in a narrow lumen and avoid the risk of failure of traditional laser ranging sensors in an oily environment. The elastic deformation of the third compression spring can absorb the ellipticity error of the inner wall of the pipe, ensuring that the sliding trajectory of the display ring 203 is parallel to the axis of the pipe, reducing the reading deviation caused by the deformation of the pipe. The sliding design of the adjustment plate 204 supports pipe diameter coverage. By adjusting the effective contact length of the contact plate 201, it ensures that the pipe end face and the measurement reference plane are always in contact, solving the measurement result problem caused by the tilt of the end face of large-diameter pipes.

[0045] The cutting portion 303 further includes an auxiliary plate 304 slidably connected to the cutting portion 303 , and a fourth compression spring is fixedly connected between the auxiliary plate 304 and the cutting portion 303 .

[0046] Before the actual cutting operation is performed, the processing column 101 can be aligned with the end face of the pipe before the processing column 101 is inserted into the pipe. Then, the C-shaped block 301 is slid on the processing column 101 according to the control program to be executed later. During this process, the cutting portion 303 will slide forward, thereby pre-displaying the distance that the cutting portion 303 needs to feed in the subsequent cutting process. At this time, the staff can directly observe whether the moving range of the cutting portion 303 meets the production requirements according to the pipe end face, thereby determining whether the control program at this time meets the production requirements, thereby further avoiding abnormal sliding of the cutting portion 303, which may lead to waste, or the staff being unable to detect abnormal conditions in the notch in the pipe, which may affect the normal use function after leaving the factory;

[0047] When the cutting part 303 slides, when the cutting part 303 slides to be offset from the stepped circular plate 501, the auxiliary plate 304 will slide due to the elastic force of the fourth compression spring, and then rest against the end face of the pipe, which further facilitates the intuitive observation of whether the moving distance of the cutting part 303 is compliant. The mechanical path preview allows the operator to directly observe whether the cutting range covers the target area, avoiding the scrapping of pipes due to program errors in traditional processes. Early verification in the no-load state can detect tool path interference or overtravel risks.

[0048] Each of the support parts 502 is slidably connected to a matching part 504, and a second compression spring is fixedly connected between each support part 502 and the matching part 504. Multiple transmission inclined rods 604 can respectively contact multiple matching parts 504, and multiple support parts 502 are respectively provided with multiple electromagnetic blocks, and multiple electromagnetic blocks can respectively fix multiple support parts 502. The elastic force of the second compression spring is greater than the elastic force of the first compression spring. A T-shaped plate 305 is slidably connected to the cutting part 303, and a second electric push rod that can push the T-shaped plate 305 to slide is fixed to the cutting part 303. The cutter is detachably connected to the T-shaped plate 305 by bolts.

[0049] When the rotating part 601 rotates, the multiple transmission inclined rods 604 on the rotating part 601 will move the multiple matching parts 504, so that the multiple support parts 502 overcome the elastic force of the first compression spring and slide in the direction away from the center of the stepped circular plate 501. During this process, since the elastic force of the second compression spring is greater than the elastic force of the first compression spring, the multiple matching parts 504 will not slide on the multiple support parts 502. When the multiple support parts 502 abut against the inner wall of the pipe, continuing to rotate the rotating part 601 will not cause the multiple support parts 502 to continue sliding, but will cause the multiple matching parts 504 to slide inside the multiple support parts 502, overcoming the elastic force of the second compression spring. At this time, the multiple electromagnetic blocks can be energized to fix the multiple matching parts 504. Through the cooperation between the rotating part 601 and the multiple matching parts 504, the subsequent support effect of the multiple support parts 502 and the multiple support blocks 503 on the inner wall of the pipe is guaranteed;

[0050] When the pipe to be processed is not a regular pipe, but an irregular pipe composed of pipes of different diameters, and the pipe diameter of the area to be grooved is different from the end face pipe diameter, the stepped circular plate 501 can be moved to the area to be grooved, and then the rotating part 601 is operated to rotate until the electromagnetic block is energized, so that the pipe diameter of the area to be grooved is automatically sensed, and then the T-shaped plate 305 is slid on the cutting part 303 according to the sensed signal until the T-shaped plate 305 slides to the position where the cutter just contacts the inner wall of the pipe in the area to be grooved, and then the T-shaped plate 305 is slid on the cutting part 303, and the cutter is moved to the position where it contacts the inner wall of the pipe, and then the subsequent cutting operation is performed. During this process, the C-shaped block 301 is always outside the pipe. At this time, the number of scale marks 102 passed by the C-shaped block 301 is the distance traveled by the cutter, that is, the distance corresponding to the scale mark 102 slid by the C-shaped block 301 is sufficient. The cutting depth of the notch can be directly and accurately observed, and when cutting complex pipes composed of pipes of various diameters, the operator can timely grasp the movement of the cutter, thereby observing whether the cutter feed distance is in compliance and accurately judging whether the control program at this time meets production requirements. This overcomes the defect of not being able to grasp the notch forming situation due to the inability to directly observe the cutting situation inside the pipe. The reading of the scale mark 102 sliding on the outside of the C-shaped block 301 directly maps the cutter feed amount, forming a closed-loop control of "cutting inside the pipe - observing outside the pipe". This design enables the operator to judge the notch depth in real time and ensure the processing yield. The initial positioning by radial expansion of the support part 502, the fine positioning by axial adjustment of the T-shaped plate 305, and the final positioning by tightening the electromagnetic block can stably ensure that the movement trajectory of the cutting part 303 can be accurately displayed by the C-shaped block 301, bringing convenience to subsequent processing.

[0051] Example 1 of obtaining the diameter of the groove area in the pipe:

[0052] By connecting multiple displacement sensors to the stepped circular plate 501 and fixing the movable ends of the multiple displacement sensors to the support parts 502, the sliding of the multiple support parts 502 is detected. When the rotating part 601 rotates until the multiple support parts 502 abut against the inner wall of the pipe, the multiple support parts 502 no longer slide. At this time, the multiple displacement sensors can accurately determine the sliding distance of the multiple support parts 502, thereby obtaining the diameter of the groove cutting area in the pipe, so that the subsequent cutter can smoothly move to the contact position with the inner wall of the pipe.

[0053] Example 2 of obtaining the diameter of the groove area in the pipe:

[0054] By connecting an angle sensor to the stepped circular plate 501, fixing the movable end of the angle sensor to the rotating part 601, and fixing a pressure sensor in each support part 502, multiple matching parts 504 can contact multiple pressure sensors, and then after the rotating part 601 rotates until the multiple matching parts 504 respectively contact the multiple pressure sensors, the multiple pressure sensors can obtain signals, thereby sensing the sliding distance of the multiple support parts 502 according to the angle rotated by the rotating part 601 at this time, and then obtaining the pipe diameter of the groove area in the pipe.

[0055] In the above two embodiments, multiple pressure sensors capable of contacting the multiple matching parts 504 are fixedly connected to the multiple supporting parts 502, so as to sense the sliding conditions of the matching parts 504, and transmit signals to energize the electromagnetic blocks when the multiple matching parts 504 slide, so as to adsorb and fix the multiple matching parts 504, thereby ensuring subsequent stable support work.

[0056] The rectangular rod 401 has an inclined portion 402 therein, a rectangular groove therein, a mesh plate 403 fixed therein, a baffle 404 slidably connected to the rectangular rod 401, and a second electric push rod fixed thereon that can push the baffle 404 to slide.

[0057] The baffle 404 can divide the inside of the rectangular rod 401 into two parts. The staff adds pigment powder to the right side of the baffle 404. When the cutter reaches the appropriate position for subsequent cutting operations, the baffle 404 is slid upward a short distance to allow part of the pigment powder to slide along the inclined portion 402 to the left side of the baffle 404, and then the cutting portion 303 is slid for subsequent cutting operations. Under normal circumstances, the processing column 101 will block the lower side of the baffle 404. When cutting, the baffle 404 will gradually stagger with the processing column 101, allowing part of the pigment powder to spill, and then the pipe that has completed the cutting operation will be marked with pigment, so that subsequent staff can accurately grasp whether the pipe has completed the cutting operation, and avoid the situation where the cutting part is inside the pipe body and the staff cannot accurately observe whether the cutting has been performed.

[0058] A rubber layer 603 is fixed to the rotating part 601, an oblique bar 405 is fixed to the rectangular rod 401, a pressing column 104 is slidably connected to the processing column 101, the pressing column 104 can contact the oblique bar 405, and a third compression spring is fixed between the pressing column 104 and the processing column 101.

[0059] When the cutting part 303 is used for cutting, during the feeding process of the cutting part 303, the rectangular rod 401 will gradually push the pressing column 104 to slide on the processing column 101, so that the pressing column 104 gradually presses against the rubber layer 603, causing the rubber layer 603 to deform and thereby increase the rotational friction of the rubber layer 603, thereby firmly fixing the rotating part 601 after rotation, and then cooperating with the electromagnetic block to ensure the subsequent stable support effect, thereby avoiding damage to the gear and the gear ring 602 or damage to the self-locking function of the first motor;

[0060] At the same time, since the inclination of the rectangular rod 401 gradually increases from front to back, the feeding degree of the cutting portion 303 is increased, the deformation degree of the rubber layer 603 is greater, and the fixing effect of the rubber layer 603 is stronger. Therefore, the auxiliary fixing effect of the rubber layer 603 is gradually increased according to the processing progress, thereby ensuring the auxiliary fixing effect while extending the service life of the rubber layer 603 as much as possible.

[0061] It also includes a slide rail 105, a connecting frame 103 is slidably connected to the slide rail 105, a processing column 101 is fixed to the connecting frame 103, a third motor is fixed to the slide rail 105, and a lead screw B is fixed to the output shaft of the third motor.

[0062] When the connecting frame 103 needs to be driven to slide, the output shaft of the third motor rotates, thereby driving the screw B to rotate, so that the screw B drives the connecting frame 103 to slide on the slide rail 105, thereby completing the effect of sending the processing column 101 into the pipe.

[0063] The method for cutting pipes using the in-pipe cutting machine comprises the following steps:

[0064] Step 1: Use a clamp that can clamp and fix the pipe and has its own power source to drive the pipe to rotate to clamp the pipe to be cut;

[0065] Step 2: Slide the connecting frame 103 on the slide rail 105 until the cutting portion 303 moves to the area to be cut;

[0066] Step 3: Operate the rotating portion 601 to rotate until the plurality of supporting portions 502 abut against the inner wall of the pipe;

[0067] Step 4: Operate the C-shaped block 301 to slide on the processing column 101, and according to production requirements, slide the connecting frame 103 on the slide rail 105 and cooperate with the clamp to drive the pipe to rotate to complete the notch cutting;

[0068] Step 5: Remove the pipe and complete the internal processing of the pipe.

Claims

1. A pipe cutting machine, characterized in that: The machine tool comprises a processing column, a rectangular rod is slidably connected to the processing column, a cutting portion is fixed to the rectangular rod, the processing column can slide left and right along the horizontal direction, a cutter is connected to the cutting portion, a stepped circular plate is fixed to the processing column, a rotating portion is rotatably connected to the stepped circular plate, a plurality of transmission oblique rods are fixed to the rotating portion, a supporting portion is slidably connected to the stepped circular plate, a first compression spring is fixed between each supporting portion and the stepped circular plate, and the plurality of transmission oblique rods can respectively drive the plurality of supporting portions to slide; Each of the support parts is fixedly connected to a support block; It also includes a C-shaped block slidably connected to the processing column, one end of a hinged rod is hinged to the C-shaped block, and the other end of the hinged rod is hinged to the cutting part; The processing column is provided with a plurality of scale marks, a display ring is slidably connected to the processing column, a connecting rod is fixed to the display ring, a contact plate is fixed to the connecting rod, an adjustment plate is slidably connected to the contact plate, and a third compression spring is fixed between the display ring and the processing column; It also includes an auxiliary plate slidably connected to the cutting portion, and a fourth compression spring is fixedly connected between the auxiliary plate and the cutting portion; Each of the support parts is slidably connected to a matching part, a second compression spring is fixed between each support part and the matching part, a plurality of transmission inclined rods can respectively contact the plurality of matching parts, and a T-shaped plate is slidably connected to the cutting part; The utility model also comprises a slide rail, a connecting frame is slidably connected to the slide rail, and a processing column is fixedly connected to the connecting frame.

2. The in-pipe cutting machine according to claim 1, characterized in that: An inclined portion is provided in the rectangular rod, a rectangular groove is opened on the rectangular rod, a mesh plate is fixed in the rectangular groove, and a baffle is slidably connected to the rectangular rod.

3. The in-pipe cutting machine according to claim 2, characterized in that: A rubber layer is fixedly connected to the rotating part, an oblique bar is fixedly connected to the rectangular rod, and a pressing column is slidably connected to the processing column, and the pressing column can contact the oblique bar.

4. The method for cutting pipes using a pipe cutting machine according to claim 1, characterized in that: The method comprises the following steps: Step 1: Use a clamp that can clamp and fix the pipe and has its own power source to drive the pipe to rotate to clamp the pipe to be cut; Step 2: Slide the connecting frame on the slide rail until the cutting part moves to the area to be cut; Step 3: Operate the rotating part to rotate until the multiple supporting parts abut against the inner wall of the pipe; Step 4: Operate the C-shaped block to slide on the processing column, and according to production requirements, slide the connecting frame on the slide rail and cooperate with the clamp to drive the pipe to rotate to complete the notch cutting; Step 5: Remove the pipe and complete the internal processing of the pipe.

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