In-pipe cutting machine tool and cutting method thereof

Abstract

The invention belongs to the technical field of pipe cutting machine tools, and particularly relates to an in-pipe cutting machine tool and a cutting method.The in-pipe cutting machine tool comprises a machining column, a rectangular rod is slidably connected to the machining column, a cutting part is fixedly connected to the rectangular rod, the machining column can slide left and right in the horizontal direction, and a cutter is connected to the cutting part; the invention discloses an in-pipe cutting machine tool which comprises a machining column, a stepped circular plate is fixedly connected to the machining column, a rotating part is rotatably connected to the stepped circular plate, a plurality of transmission inclined rods are fixedly connected to the rotating part, and a supporting part is slidably connected to the stepped circular plate. The clamp is provided with a power source and can drive the pipe to rotate to clamp the pipe to be cut; the cutting area can be stably supported when the composite pipe is cut in the pipe, and the notch cutting effect is guaranteed.

Description

Technical Field

[0001] The present invention belongs to the technical field of pipe cutting machine tools, and particularly relates to a pipe internal cutting machine tool and a cutting method thereof. Background Art

[0002] During the machining of pipes using a machine tool, when performing notch forming on the inner pipe of a composite pipe composed of a double-layer pipe or a pipe with other materials wrapped on its surface, the prior art usually adopts a process separation mode of "single-layer pipe cutting → composite machining", which is prone to cumulative assembly errors and increased process time consumption, so there are certain inconveniences. However, cutting inside the pipe can effectively solve the above problems. However, when cutting inside the pipe, if only using the traditional fixture with the common external clamping method in the prior art, the acting point of the clamping force is too far from the cutting area, and it is impossible to support the cutting area inside the pipe. As a result, the pipe is prone to offset or vibration during the cutting process, which affects 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

[0003] In view of this, the technical problem to be solved by the present invention is to provide a pipe internal cutting machine tool and a cutting method thereof, which can stably support the cutting area when cutting inside the composite pipe to ensure the notch cutting effect.

[0004] A pipe internal cutting machine tool includes a processing column, a rectangular rod is slidably connected to the processing column, a cutting part is fixedly connected to the rectangular rod, the processing column can slide left and right along the horizontal direction, a cutting tool is connected to the cutting part, a stepped circular plate is fixedly connected to the processing column, a rotating part is rotatably connected to the stepped circular plate, a plurality of transmission inclined rods are fixedly connected to the rotating part, a supporting part is slidably connected to the stepped circular plate, a first compression spring is fixedly connected between each supporting part and the stepped circular plate, and the plurality of transmission inclined rods can respectively push and move the plurality of supporting parts to slide.

[0005] A supporting block is fixedly connected to each of the supporting parts.

[0006] It further 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.

[0007] A plurality of scale marks are provided on the processing column, a display ring is slidably connected to the processing column, a connecting rod is fixedly connected to the display ring, a contact plate is fixedly connected to the connecting rod, an adjusting plate is slidably connected to the contact plate, and a third compression spring is fixedly connected between the display ring and the processing column.

[0008] The cutting method of the pipe internal cutting machine tool for cutting pipes includes the following steps: Step 1: Clamp the pipe to be cut using a fixture that can hold and fix the pipe and has its own power source to drive the pipe to rotate. 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 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 slide the connecting frame on the slide rail according to production requirements and cooperate with the fixture to drive the pipe to rotate to complete the notch cutting. Step 5: Remove the pipe to complete the internal processing of the pipe.

[0009] The beneficial effects of this equipment are as follows: It can stably support the cutting area during internal pipe cutting of composite pipes, ensure the notch cutting effect, can perform internal pipe cutting operations on the inner wall of composite pipes according to production requirements after the composite pipes are formed, greatly simplify the assembly difficulty between composite pipes and between composite pipes and other materials, and can also adapt to sudden production requirements. Brief Description of the Drawings

[0010] The following further elaborates on the present invention in detail in conjunction with the drawings and specific implementation methods.

[0011] Figure 1 and Figure 2 is a schematic diagram of the overall structure of an internal pipe cutting machine tool; Figure 3 is a schematic diagram of the structure of the slide rail; Figure 4 is a schematic cross-sectional structure diagram of the display ring; Figure 5 is a schematic diagram of the structure of the C-shaped block; Figure 6 is a schematic cross-sectional structure diagram of the cutting part; Figure 7 is a schematic diagram of the structure of the processing column; Figure 8 is a schematic diagram of the structure of the stepped circular plate; Figure 9 is a schematic diagram of the structure of the support block; Figure 10 is a schematic diagram of the structure of the rotating part; Figure 11 is a schematic diagram of the structure of the pressing column; Figure 12 is a schematic diagram of the structure of the support part. Detailed Implementation Modes

[0012] An in-pipe cutting machine tool includes a processing column 101. A rectangular rod 401 is slidably connected to the processing column 101. A cutting part 303 is fixedly connected to the rectangular rod 401. A cutting tool is connected to the cutting part 303. A stepped circular plate 501 is fixedly connected to the processing column 101. A rotating part 601 is rotatably connected to the stepped circular plate 501. A toothed ring 602 is fixedly connected to the rotating part 601. A first motor is fixedly connected to the stepped circular plate 501. A gear is fixedly connected to the output shaft of the first motor. The gear meshes with the toothed ring 602. A plurality of transmission inclined rods 604 are fixedly connected to the rotating part 601. A supporting part 502 is slidably connected to the stepped circular plate 501. A first compression spring is fixedly connected between each supporting part 502 and the stepped circular plate 501. The plurality of transmission inclined rods 604 can respectively push and move the plurality of supporting parts 502 to slide.

[0013] Clamp the pipe to be cut by using a fixture that can clamp and fix the pipe and has its own power source to drive the pipe to rotate. Then, operate the processing column 101 to slide horizontally towards the pipe, so that the processing column 101 gradually inserts into the inner wall of the pipe until the cutting tool on the cutting part 303 is moved to a position where it can coincide with the area to be cut of the pipe. Then, make the pipe be driven by the fixture and rotate continuously. During this process, make the rectangular rod 401 slide on the processing column 101, thereby driving the cutting tool to move, so that the cutting tool gradually contacts the inner wall of the pipe. Then, with the continuous rotation of the pipe, use the cutting tool to perform a notch cutting operation on the inside of the pipe, so as to adapt to the production requirements and perform an in-pipe cutting operation on a double-layer pipe or a composite pipe with other materials wrapped on the surface without touching the outer layer of materials, achieving an in-pipe cutting effect. The above-mentioned fixture is a conventional technical means in existing machine tools and is well-known prior art to those skilled in the art, so it will not be elaborated here. After the processing column 101 is slid to a position where the cutting tool can coincide with the area to be cut of the pipe, make the output shaft of the first motor rotate, thereby making the gear drive the toothed ring 602 to rotate, making the rotating part 601 rotate on the stepped circular plate 501, and then using the plurality of transmission inclined rods 604 to push and move the plurality of supporting parts 502 to slide, so that the plurality of supporting parts 502 synchronously overcome the elastic force of the first compression spring and slide away from the center of the stepped circular plate 501 until the plurality of supporting parts 502 abut against the inner wall of the pipe. Then, make the pipe rotate and make the rectangular rod 401 slide to complete the subsequent cutting effect. During this process, the abutting setting of the plurality of supporting parts 502 can support the inner wall of the pipe of the composite pipe, ensuring that the composite pipe will not shake during cutting, thereby ensuring the stability during the in-pipe cutting process and ensuring the notch forming effect, and avoiding the situation where the inner wall of the composite pipe deviates during the in-pipe cutting process due to the excessive distance between the clamping part and the processing part or the traditional fixture can only clamp the outside of the composite pipe. Through the rotation operation of the rotating part 601, multiple supporting parts 502 can be synchronously driven to slide to complete the abutting effect, thereby reducing the power source for subsequent operation and maintenance while ensuring the stability of the supporting effect, which brings convenience to actual use; After the composite pipe is formed, the device can perform in-pipe cutting operations on the inner wall of the composite pipe according to production requirements. Compared with the processing process of first performing traditional out-of-pipe cutting on a single pipe and then performing subsequent composite operations, this application can greatly simplify the assembly difficulty between the pipes of the composite pipe or between the pipe and other materials. At the same time, it can also adapt to sudden production requirements. When there is a sudden need to form a notch inside the composite pipe, on the basis of the original composite pipe production line, there is no need to interrupt and transform the production line, and there is no need to add an additional cutting step in the middle. Only need to form the composite pipe normally according to the original production line, and then send the composite pipe into this device for in-pipe cutting operation after the composite pipe is formed to meet the production requirements, and the stability of the notch forming is ensured by multiple supporting parts 502.

[0014] A support block 503 is fixedly connected to each of the support parts 502.

[0015] 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 abut against the inner wall of the pipe. The multiple support parts 502 can abut against the inner wall of the pipe on the left side of the cutter, and the multiple support blocks 503 can abut against the inner wall of the pipe on the right side of the cutter. Thus, 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 in-pipe cutting operations on the pipe and ensure the normal forming effect of the in-pipe notch.

[0016] The support part 502 and the support block 503 respectively abut against the inner walls of the pipe on the left and right sides of the cutter, forming a symmetrically distributed support force field. By offsetting the cutting reaction force, the axial offset of the pipe caused by unilateral force is avoided. Especially during the processing of thin-walled pipes, the amplitude is effectively reduced. At the same time, the double support points are distributed on both sides of the cutter, effectively suppressing the circumferential vibration and radial deformation of the pipe during the cutting process.

[0017] It further includes a C-shaped block 301 slidably connected to the processing column 101. One end of a hinge rod 302 is hinged to the C-shaped block 301, and the other end of the hinge rod 302 is hinged to the cutting part 303. A second motor is fixedly connected to the processing column 101, and a lead screw A is fixedly connected to the output shaft of the second motor. The lead screw A is threadedly connected to the C-shaped block 301.

[0018] When it is necessary to make the rectangular rod 401 slide so that the cutting tool contacts the inner wall of the pipe, the second motor drives the lead screw A to rotate, causing the C-shaped block 301 to slide on the processing column 101. Then, the C-shaped block 301 drives one end of the articulated rod 302 to slide horizontally left and right synchronously, causing the other end of the articulated rod 302 to drive the cutting part 303 to slide in the front-back direction. Further, the cutting part 303 drives the rectangular rod 401 to slide on the processing column 101, completing the subsequent grooving effect; The setting of the C-shaped block 301 enables the cutting part 303 to be driven to move through the C-shaped block 301, without the need to integrate the power source between the rectangular rod 401 and the processing column 101. Thus, a larger movable stroke can be provided for the cutting part 303 to adapt to the internal pipe cutting operations of various pipes with different sizes; At the same time, the sliding path of the C-shaped block 301 is parallel to the axis of the processing column 101. Cooperating with the guide groove of the rectangular rod 401, a three-point contact support system is formed to prevent the cutting tool from being overloaded during processing, which may cause the rectangular rod 401 to shift.

[0019] A plurality of scale marks 102 are provided on the processing column 101. A display ring 203 is slidably connected to the processing column 101. A connecting rod 202 is fixedly connected to the display ring 203. A contact plate 201 is fixedly connected to the connecting rod 202. An adjusting plate 204 is slidably connected to the contact plate 201. A first electric push rod capable of pushing the adjusting plate 204 to slide is fixedly connected to the contact plate 201. A third compression spring is fixedly connected between the display ring 203 and the processing column 101.

[0020] When making the processing column 101 slide to move the cutting tool to the cutting area, when the device is inserted into the interior of the pipe, the contact plate 201 will contact the pipe synchronously. As the processing column 101 continues to slide subsequently, the display ring 203 will gradually slide adaptively on the processing column 101 against the elastic force of the third compression spring, causing the scale marks 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 corresponding relationship between the display ring 203 and the scale marks 102. Thus, when the cutting tool moves to the cutting area, the movement of the processing column 101 can be stopped in time, and subsequent cutting operations can be carried out. Therefore, with the reference of the scale marks 102, the grooving cutting operation can be further ensured to proceed stably according to the production requirements, avoiding the situation of cutting deviation of the groove due to the narrow space inside the pipe and the inability of the staff to directly observe.

[0021] The setting of the adjusting plate 204 enables, in actual use, when the diameter of the pipe is too large and the contact plate 201 cannot contact the end face of the pipe wall, the adjusting plate 204 can be operated to slide on the contact plate 201, ensuring that the contact plate 201 can always contact the end face of the pipe wall and guaranteeing the subsequent depth display effect.

[0022] 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 visualized numerical value of the scale mark 102, so that the depth positioning accuracy can be achieved in a narrow lumen, avoiding the risk of failure of traditional laser ranging sensors in an oily environment. The elastic deformation of the third compression spring can absorb the ovality error of the inner wall of the pipe, ensuring that the sliding trajectory of the display ring 203 is parallel to the pipe axis, reducing the reading deviation caused by the deformation of the pipe, and the sliding design of the adjustment plate 204 supports pipe diameter coverage. By adjusting the effective contact length of the contact plate 201, it is ensured that the pipe end face is always in contact with the measurement reference plane, solving the measurement result problem caused by the inclination of the end face of large-diameter pipes.

[0023] It also 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 .

[0024] Before the actual cutting operation is performed, the processing column 101 can be made to coincide with the end face of the pipe before the processing column 101 is inserted into the pipe. Then, the C-block 301 is made to slide on the processing column 101 according to the control program to be executed later. During this process, the cutting part 303 will slide forward, thereby pre-displaying the distance that the cutting part 303 needs to feed in the subsequent cutting process. At this time, the staff can directly observe whether the moving range of the cutting part 303 meets the production requirements according to the end face of the pipe, thereby determining whether the control program at this time meets the production requirements, thereby further avoiding the abnormal sliding of the cutting part 303, thereby causing waste, or the staff cannot find the abnormality of the notch in the pipe, thereby affecting the normal use function after leaving the factory; 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, thereby 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.

[0025] Each of the support parts 502 is slidably connected with 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 the multiple matching parts 504, and multiple electromagnetic blocks are respectively provided on the multiple support parts 502. The multiple electromagnetic blocks can respectively fix the multiple support parts 502, and 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 fixedly connected to the cutting part 303, and a cutter is detachably connected to the T-shaped plate 305 by bolts.

[0026] 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 supporting 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. In 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 supporting parts 502. When the multiple supporting parts 502 are against the inner wall of the pipe, continuing to rotate the rotating part 601 will not cause the multiple supporting parts 502 to continue to slide, but will cause the multiple matching parts 504 to slide in the multiple supporting parts 502 to overcome 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 supporting parts 502 and the multiple supporting blocks 503 on the inner wall of the pipe is guaranteed. 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 as to automatically sense the pipe diameter of the area to be grooved, and then the T-plate 305 is slid on the cutting part 303 according to the sensed signal, until the T-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-plate 305 is slid on the cutting part 303, and the cutter is moved to the position in contact with the inner wall of the pipe, and then the subsequent cutting operation is performed. During this process, the C-block 301 is always outside the pipe. At this time, the number of scale marks 102 passed by the C-block 301 is the distance traveled by the cutter, that is, the distance corresponding to the sliding of the C-block 301 over the scale mark 102 is sufficient. The cutting depth of the notch can be directly and accurately observed, so that when cutting complex pipes composed of pipes of different diameters, the staff can timely grasp the movement of the cutter, thereby observing whether the feed distance of the cutter is in compliance with regulations and accurately judging whether the control program at this time meets the production requirements, thereby overcoming the defect that the notch forming situation cannot be grasped due to the inability to directly observe the cutting situation inside the pipe. The scale mark 102 reading of the C-type block 301 sliding outside the pipe directly maps the feed amount of the cutter, 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 of the radial expansion of the support part 502, the fine positioning of the axial adjustment of the T-type plate 305 and the final positioning of the tightening of the electromagnetic block can stably ensure that the moving trajectory of the cutting part 303 can be accurately displayed by the C-type block 301, which brings convenience to subsequent processing; Example 1 of obtaining the diameter of the grooved area in the pipe: By connecting a plurality of displacement sensors to the stepped circular plate 501 and fixing the moving ends of the plurality of displacement sensors to the support parts 502, the sliding conditions of the plurality of support parts 502 are detected. When the rotating part 601 rotates until the plurality of support parts 502 abut against the inner wall of the pipe, the plurality of support parts 502 will no longer slide. At this time, the sliding distance of the plurality of support parts 502 can be accurately known through the plurality of displacement sensors, thereby obtaining the pipe 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. Example 2 of obtaining the diameter of the grooved area in the pipe: By connecting an angle sensor to the stepped circular plate 501, and fixing the moving end of the angle sensor to the rotating part 601, and fixing a pressure sensor in each support part 502, the multiple matching parts 504 can contact the multiple pressure sensors, and then after the rotating part 601 rotates until the multiple matching parts 504 contact the multiple pressure sensors respectively, the multiple pressure sensors can obtain signals, so as to sense the sliding distance of the multiple support parts 502 according to the angle rotated by the rotating part 601 at this time, and then obtain the pipe diameter of the groove cutting area in the pipe.

[0027] In the above two embodiments, multiple pressure sensors capable of contacting the multiple matching parts 504 are fixedly connected inside the multiple supporting parts 502, so as to sense the sliding conditions of the matching parts 504. When the multiple matching parts 504 slide, signals are transmitted to energize the electromagnetic blocks, so as to adsorb and fix the multiple matching parts 504, thereby ensuring subsequent stable support work.

[0028] The rectangular rod 401 has an inclined surface 402 therein, a rectangular groove thereon, a mesh plate 403 fixed therein, a baffle 404 slidably connected thereto, and a second electric push rod fixed thereon that can push the baffle 404 to slide.

[0029] 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.

[0030] A rubber layer 603 is fixedly connected to the rotating part 601 , an oblique bar 405 is fixedly connected 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 fixedly connected between the pressing column 104 and the processing column 101 .

[0031] 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 thus increase the rotational friction of the rubber layer 603, so as to firmly fix the rotating part 601 after rotation, and then cooperate with the electromagnetic block to ensure the subsequent stable support effect, so as to avoid the gear and the gear ring 602 from being damaged or the self-locking function of the first motor from being damaged; At the same time, since the inclination of the rectangular rod 401 gradually increases from front to back, the higher the supply degree of the cutting portion 303, the greater the deformation degree of the rubber layer 603, and the stronger the fixing effect of the rubber layer 603. Therefore, the auxiliary fixing effect of the rubber layer 603 is gradually increased according to the processing progress, and the auxiliary fixing effect is guaranteed under the premise of extending the service life of the rubber layer 603 as much as possible.

[0032] It also includes a slide rail 105, a connecting frame 103 is slidably connected to the slide rail 105, a processing column 101 is fixedly connected to the connecting frame 103, a third motor is fixedly connected to the slide rail 105, and a lead screw B is fixedly connected to the output shaft of the third motor.

[0033] When the connecting frame 103 needs to be driven to slide, the output shaft of the third motor is rotated, thereby driving the lead screw B to rotate, so that the lead 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 interior of the pipe.

[0034] The in-pipe cutting machine tool is used for a method of cutting a pipe, the method comprising 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: Make the connecting frame 103 slide on the slide rail 105 until the cutting part 303 moves to the area to be cut; Step 3: Operate the rotating part 601 to rotate until the plurality of supporting parts 502 abut against the inner wall of the tube; Step 4: operate the C-shaped block 301 to slide on the processing column 101, and according to production requirements, make the connecting frame 103 slide on the slide rail 105 and cooperate with the clamp to drive the pipe to rotate to complete the notch cutting; Step 5: Remove the pipe and complete the processing inside the pipe.

Claims

1. A pipe internal cutting machine tool, characterized in that, It includes a processing column, on which a rectangular rod is slidably connected. A cutting part is fixedly connected to the rectangular rod. The processing column can slide left and right along the horizontal direction. A cutting tool is connected to the cutting part. A stepped circular plate is fixedly connected to the processing column. A rotating part is rotatably connected to the stepped circular plate. A plurality of transmission inclined rods are fixedly connected to the rotating part. A supporting part is slidably connected to the stepped circular plate. A first compression spring is fixedly connected between each supporting part and the stepped circular plate. The plurality of transmission inclined rods can respectively push the plurality of supporting parts to slide.

2. The internal pipe cutting machine according to claim 1, wherein A supporting block is fixedly connected to each of the supporting parts.

3. The internal pipe cutting machine according to claim 2, characterized in that, 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.

4. The internal pipe cutting machine according to claim 3, characterized in that, A plurality of scale marks are provided on the processing column. A display ring is slidably connected to the processing column. A connecting rod is fixedly connected to the display ring. A contact plate is fixedly connected to the connecting rod. An adjusting plate is slidably connected to the contact plate. A third compression spring is fixedly connected between the display ring and the processing column.

5. The internal pipe cutting machine according to claim 4, characterized in that, It also includes an auxiliary plate slidably connected to the cutting part. A fourth compression spring is fixedly connected between the auxiliary plate and the cutting part.

6. The inside-tube cutting machine tool according to claim 5, wherein, A matching part is slidably connected to each of the supporting parts. A second compression spring is fixedly connected between each supporting part and the matching part. The plurality of transmission inclined rods can respectively contact the plurality of matching parts. A T-shaped plate is slidably connected to the cutting part.

7. The internal pipe cutting machine according to claim 6, characterized in that, An inclined surface part is provided in the rectangular rod. A rectangular groove is provided on the rectangular rod. A mesh plate is fixedly connected in the rectangular groove. A baffle is slidably connected to the rectangular rod.

8. A pipe internal cutting machine tool according to claim 7, characterized in that, A rubber layer is fixedly connected to the rotating part. An inclined strip is fixedly connected to the rectangular rod. A pressing column is slidably connected to the processing column. The pressing column can contact the inclined strip.

9. The internal pipe cutting machine according to claim 6, wherein, It also includes a slide rail, on which a connecting frame is slidably connected. The processing column is fixedly connected to the connecting frame.

10. A cutting method for a tube cutting machine for cutting tubes according to claim 9, characterized in that, The method includes the following steps: Step 1: Use a fixture 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 plurality of supporting parts abut against the inner wall of the pipe. Step 4: Operate the C-shaped block to slide on the processing column, and slide the connecting frame on the slide rail according to production requirements and cooperate with the fixture to drive the pipe to rotate to complete the notch cutting. Step 5: Remove the pipe to complete the in-pipe processing.

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