Automatic chamfering machine for steel pipes

Abstract

The invention discloses an automatic steel pipe chamfering machine, which relates to the technical field of processing, comprises a mounting table on which a clamping device and a chamfering assembly are mounted, and is characterized by comprising a movable seat, an extrusion seat is slidably mounted on the movable seat, a plurality of clamping rods are slidably mounted on the extrusion seat and the movable seat, and the clamping rods point to the same circle center together; the clamping rod is provided with two clamping plates, and the two clamping plates clamp steel pipes in different shapes by changing angles. According to the technical scheme, the angle between the two clamping plates is changed, the two clamping plates are located in the same plane and can be attached to the side face of a square steel pipe, a certain angle exists between the two clamping plates, a round steel pipe can be clamped more stably, and therefore adaptability is higher, and clamping is more stable.

Description

Technical Field

[0001] This invention relates to the field of processing technology, and in particular to an automatic steel pipe chamfering machine. Background Technology

[0002] In the welding and assembly of steel pipe structural components, chamfering (also known as beveling) the ends of the steel pipes is a crucial preliminary step. The main function of chamfering is to eliminate sharp edges and burrs present at the cut ends of the steel pipes, effectively ensuring the safety of subsequent workers. Simultaneously, it creates a suitable welding bevel, significantly increasing the filling space and contact area of ​​the welding material, thereby greatly improving welding strength and quality, avoiding defects such as incomplete penetration, and enhancing the overall aesthetics and corrosion resistance of the component. Currently, the industry typically uses dedicated chamfering machines or handheld chamfering equipment to complete this operation. The core technology lies in milling the ends of the steel pipes using a high-speed rotating cutting tool. However, existing chamfering equipment often has significant limitations in its clamping and fixing devices. Most of them are designed to clamp circular sections with specific cross-sections. For example, common three-jaw chucks or V-block clamps have good centering and clamping effects for standard round pipes, but when faced with irregularly shaped steel pipes such as square, rectangular, or elliptical sections, these clamps cannot provide stable and uniform clamping force, resulting in unreliable clamping. This can even cause the steel pipe to loosen or vibrate during processing, which not only seriously affects the processing quality and accuracy of the chamfered surface, but may also damage the cutting tools and even the equipment. This severely restricts production flexibility and cannot meet the adaptive needs of modern processing for efficient and high-quality chamfering of various types, small batches, and irregularly shaped steel pipes. Summary of the Invention

[0003] To address the aforementioned technical problems, this invention discloses an automatic steel pipe chamfering machine, comprising a mounting platform, a clamping device and a chamfering assembly mounted on the mounting platform, including a movable base, a pressing base slidably mounted on the movable base, and multiple clamping rods slidably mounted on the pressing base and the movable base, all pointing towards the same center. Each clamping rod is equipped with two clamping plates, which clamp steel pipes of different shapes by changing their angle. Through this technical solution, by changing the angle between the two clamping plates, ensuring they are in the same plane, it is possible to conform to the side of a square steel pipe. The presence of a certain angle between the two clamping plates allows for more stable clamping of round steel pipes, thus offering greater adaptability and more stable clamping.

[0004] Furthermore, a central rod is slidably mounted inside the clamping rod, and a spring is fixedly mounted between the central rod and the clamping rod. The central rod is hinged to the two clamping plates, and a torsion spring is fixedly mounted at the hinge position, so that the included angle between the two clamping plates is an obtuse angle.

[0005] Furthermore, a mating shaft is fixedly mounted at the end of the clamping rod, and a mating sleeve is fixedly mounted on the clamping plate, with the mating shaft sleeved inside the mating sleeve. Through this technical solution, simply controlling the clamping rod allows the two clamping plates to automatically conform to the steel pipe, adapting automatically to any shape, as the ends of the clamping plates slide along the surface of the steel pipe after contact, greatly improving the degree of automation.

[0006] Furthermore, the chamfering assembly includes a movable plate, on which a main motor and an isolation plate are fixedly mounted. A mounting plate is fixedly mounted on the shaft of the main motor. The mounting plate has four elongated through holes arranged radially along the mounting plate. An outer sleeve is slidably mounted in the through holes and slides radially along the mounting plate. A cutting blade is installed inside the outer sleeve.

[0007] Furthermore, a connecting sleeve is fitted onto the main motor shaft, and the main motor shaft slides and rotates relative to the connecting sleeve. A short connecting rod is hinged onto the connecting sleeve, and the short connecting rod is hinged to the outer sleeve.

[0008] Furthermore, a mounting short plate is fixedly mounted on the outer sleeve, and a lead screw is slidably mounted on the mounting short plate. A short crossbar is fixedly mounted at the lower end of the lead screw, and a connecting block is fixedly mounted at the tail of the cutting blade. A T-slot is provided in the connecting block, and the short crossbar moves within the T-slot. Through the above technical solution, the outer sleeve can be moved up and down by driving the connecting sleeve, achieving automatic feeding during chamfer cutting. Automation makes it easier to control the feed amount, and the cutting blade can also change its angle as needed without changing the angle during feeding, resulting in more precise chamfer cuts.

[0009] Furthermore, a lower pressure plate is slidably mounted within the through hole of the mounting plate, sliding radially along the mounting plate. A second lead screw is radially mounted on the mounting plate, rotatably connected to the lower pressure plate. A small gear is rotatably mounted on the outside of the mounting plate, with internal threads. These threads engage with the second lead screw, causing it to move up and down. The second lead screw, in turn, moves the lower pressure plate up and down. A roller is rotatably mounted on one end of the lower pressure plate, pressing against the outside of the steel pipe. Through this technical solution, when the cutting blade chamfers the inside of the steel pipe, the roller presses against the outside and rotates with the mounting plate, preventing significant deformation of the steel pipe edge during cutting.

[0010] Furthermore, the lower end of the mounting platform is fixedly equipped with four support legs, two of which are equipped with a straightening assembly. The straightening assembly includes a rotating sleeve, wherein the two support legs near the clamping device are rotatably equipped with a rotating sleeve, a support rod is hinged to the rotating sleeve, and a fixed sleeve is connected to the support rod. The fixed sleeve and the support rod are connected by a ball joint.

[0011] Furthermore, reinforcing rods are fixedly mounted on the two legs near the clamping device. With this technical solution, when processing long steel pipes, relying solely on the clamping device can easily cause the steel pipe to bend and deform. The support rods prevent deformation of the steel pipe, and when not in use, the support rods can be retracted to both sides of the mounting platform, saving space.

[0012] The advantages of this invention compared to the prior art are: (1) By changing the angle between the two clamping plates through the technical solution of the present invention, the two clamping plates are in the same plane, which can fit the side of the square steel pipe. The two clamping plates have a certain angle between them, which can clamp the round steel pipe more stably. Therefore, the adaptability is higher and the clamping is more stable.

[0013] (2) Through the technical solution of the present invention, the two clamping plates can automatically fit into the steel pipe by simply controlling the clamping rod. Regardless of the shape, they can automatically adapt because the end of the clamping plate slides along the surface of the steel pipe after contacting it, which greatly improves the degree of automation.

[0014] (3) Through the technical solution of the present invention, the outer sleeve can be moved up and down by driving the connecting sleeve, and automatic feeding is achieved when cutting the chamfer. The automation makes it easier to control the feed amount. At the same time, the cutting blade can also change the angle according to the requirements, and the angle will not change during feeding, so that the chamfer can be cut more standardly.

[0015] (4) Through the technical solution of the present invention, when the cutting blade chamfers the inside of the steel pipe, the roller squeezes the outside and also rotates with the mounting plate to prevent large deformation of the steel pipe edge during cutting.

[0016] (5) With the technical solution of the present invention, when processing long steel pipes, relying solely on the clamping device to clamp them can easily cause the steel pipes to bend and deform. The support of the long support rod can prevent the steel pipes from deforming, and when not in use, the long support rod can be retracted to both sides of the mounting platform to save space. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the folding uprighting component of the present invention.

[0018] Figure 2 This is a schematic diagram of the overall structure of the straightening component of the present invention.

[0019] Figure 3 This is a schematic diagram of some parts of the clamping assembly of the present invention.

[0020] Figure 4 for Figure 3 Enlarged view of point A in the middle.

[0021] Figure 5 This is a schematic diagram of the clamping assembly of the present invention clamping a circular steel pipe.

[0022] Figure 6 This is a schematic diagram of the clamping assembly of the present invention clamping a square steel pipe.

[0023] Figure 7 This is a partial schematic diagram of the chamfering component of the present invention.

[0024] Figure 8 This is a schematic diagram of the parts being installed on the mounting plate of the present invention.

[0025] Figure 9 This is a partial cross-sectional view of the chamfering component of the present invention.

[0026] Figure 10 This is a schematic diagram of some parts of the chamfering assembly of the present invention.

[0027] Reference numerals: 1-Clamping device; 2-Chamfering assembly; 3-Straightening assembly; 4-Mounting platform; 5-Support leg; 101-Moving seat; 102-Extrusion seat; 103-Side support plate; 104-Upper mounting plate; 105-Upper electric cylinder; 106-Clamping rod; 107-Center rod; 108-Clamping plate; 109-Spring; 110-Matching shaft; 111-Matching sleeve; 112-Torsion spring; 201-Main motor; 202-Isolation plate; 203-Moving plate; 204-Lead screw; 205-Drive motor; 206- Short-range motor; 207-Vertical connecting rod; 208-Connecting sleeve; 209-Short connecting rod; 210-Outer sleeve; 211-Connecting block; 212-Mounting short plate; 213-Screw one; 214-Roller; 215-Short crossbar; 216-Lower pressure plate; 217-Screw two; 218-Pin gear; 219-Roller; 220-Cut blade; 221-End face gear; 222-Mounting plate; 301-Rotating sleeve; 302-Supporting long rod; 303-Fixing sleeve; 304-Connecting ear; 305-Reinforcing rod. Detailed Implementation

[0028] To gain a better understanding of the technical solution and beneficial effects of the present invention, the technical solution of the present invention and its beneficial effects are described in detail below with reference to the accompanying drawings.

[0029] like Figure 1 , Figure 2As shown, an automatic steel pipe chamfering machine includes a mounting platform 4, on which a clamping device 1 and a chamfering assembly 2 are mounted. Support legs 5 are fixedly mounted at the four lower corners of the mounting platform 4, and are welded to support the mounting platform 4 at a certain height. Two slide rails are provided at the upper end of the mounting platform 4, allowing the chamfering assembly 2 to move on the mounting platform 4 via a drive assembly. The clamping device 1 includes a movable base 101, which is fixedly mounted on the mounting platform 4. In other embodiments, the movable base 101 can also be slidably mounted on the slide rails of the mounting platform 4 and driven to slide by the drive assembly to adjust the distance. A pressing seat 102 is slidably mounted on the movable base 101. Specifically, side support plates 103 are fixedly mounted at both ends of the movable base 101. 2. The extrusion seat 102 and the moving seat 101 are slidably mounted with multiple clamping rods 106. Specifically, the extrusion seat 102 is provided with one clamping rod 106, which is vertically downward, and the moving seat 101 is provided with three clamping rods 106, for a total of four arranged at a 90-degree angle. The multiple clamping rods 106 all point to the same center. The lower end of the extrusion seat 102 and the upper end of the moving seat 101 are provided with semi-circular through holes. When the extrusion seat 102 and the moving seat 101 are in contact, they form a circular through hole. The top ends of the two side support plates 103 are fixedly mounted with an upper mounting plate 104. The upper end of the upper mounting plate 104 is fixedly mounted with an upper electric cylinder 105. The telescopic arm of the upper electric cylinder 105 controls the extrusion seat 102 to slide up and down.

[0030] In this embodiment, as Figure 3 Figure 4 As shown, two clamping plates 108 are mounted on the clamping rod 106. A central rod 107 is slidably mounted inside the clamping rod 106. A spring 109 is fixedly mounted between the central rod 107 and the clamping rod 106. The central rod 107 is hinged to the two clamping plates 108, and a torsion spring 112 is fixedly mounted at the hinge position. In its natural state, the included angle between the two clamping plates 108 is an obtuse angle. A mating sleeve 111 is fixedly mounted at the end of the clamping rod 106. A mating shaft 110 is fixedly mounted on the clamping plate 108. The mating shaft 110 is sleeved in the mating sleeve 111. Each clamping rod 106 is controlled by a separate small electric cylinder. The telescopic arm of the small electric cylinder is only connected to the tail of the clamping rod 106. Pushing the clamping rod 106 will cause it to slide closer to the steel pipe. If it is a square steel pipe (such as...), Figure 6 As shown), the end of the clamping plate 108 first contacts the side wall of the steel pipe. The movement of the clamping rod 106 pushes the clamping plate 108 towards the side wall of the steel pipe. During this process, the angle between the two clamping plates 108 gradually becomes 180 degrees, and the center rod 107 is also pulled out slightly, stretching the spring 109. If the clamped material is a circular steel pipe (such as...),... Figure 5As shown), the two clamping plates 108 will not be squeezed to a 180-degree angle. After clamping the steel pipe, there is still a certain angle between the two clamping plates 108, which is equivalent to applying two points of compression and clamping on a steel pipe. The four clamping rods 106 are eight small points of clamping. The two clamping plates 108 clamp steel pipes of different shapes by changing the angle. Through the above technical solution, by changing the angle between the two clamping plates 108, so that the two clamping plates 108 are in the same plane, they can fit the side of the square steel pipe. The certain angle between the two clamping plates 108 can clamp the round steel pipe more stably, thus making it more adaptable and more stable. By simply controlling the clamping rods 106, the two clamping plates 108 can automatically fit the steel pipe, regardless of the shape, because the ends of the clamping plates 108 slide along the surface of the steel pipe after contacting it, which greatly improves the degree of automation.

[0031] In this embodiment, the chamfering assembly 2 includes a movable plate 203, which is slidably mounted on the slide rail of the mounting platform 4. A mating nut is provided at one end of the movable plate 203. A drive motor 205 is fixedly mounted at one end of the mounting platform 4. A lead screw 204 is fixedly mounted on the shaft of the drive motor 205. The lead screw 204, in cooperation with the mating nut, drives the movable plate 203 to move. The drive motor 205 and the lead screw 204 form a drive assembly. A main motor 201 and an isolation plate 202 are fixedly mounted on the movable plate 203. A mounting disk 222 is fixedly mounted on the shaft of the main motor 201. A cutting blade 220 is mounted on the mounting disk 222 for rotary cutting. Specifically, as shown... Figure 9 As shown, four long through holes are provided inside the mounting plate 222. The through holes are arranged radially along the mounting plate 222. An outer sleeve 210 is slidably installed inside the through holes. The outer sleeve 210 slides radially along the mounting plate 222. A cutting blade 220 is installed inside the outer sleeve 210.

[0032] In this embodiment, a connecting sleeve 208 is sleeved on the shaft of the main motor 201, and the shaft of the main motor 201 slides and rotates relative to the connecting sleeve 208, such as... Figure 7 As shown, a short-range motor 206 is fixedly mounted on the movable plate 203. A vertical connecting rod 207 is fixedly mounted on the movable arm of the short-range motor 206. The vertical connecting rod 207 is fixedly connected to the tail of the connecting sleeve 208. That is, the short-range motor 206 drives the connecting sleeve 208 to move axially through the vertical connecting rod 207. At the same time, when the shaft of the main motor 201 rotates, it rotates inside the connecting sleeve 208 and does not drive the connecting sleeve 208 to rotate. Figure 9 , Figure 10 As shown, a short connecting rod 209 is hinged to the connecting sleeve 208. The short connecting rod 209 is hinged to the outer sleeve 210. When the short connecting rod 209 moves along the axial direction, it can drive the outer sleeve 210 to slide radially along the mounting plate 222. This action is the cutting feed action.

[0033] In this embodiment, a mounting short plate 212 is fixedly mounted on the outer sleeve 210. A lead screw 213 is slidably mounted on the mounting short plate 212. A short crossbar 215 is fixedly mounted on the lower end of the lead screw 213. A connecting block 211 is fixedly mounted on the tail of the cutting blade 220. A T-groove is provided in the connecting block 211, and the short crossbar 215 moves within the T-groove. A rotating wheel 214 is rotatably mounted on the mounting short plate 212. The rotating wheel 214 cooperates with the lead screw 213 to drive the lead screw 213 to move up and down. The up and down movement of the lead screw 213 can drive the connecting block 211 to drive the cutting blade 220 to rotate, thereby changing the cutting angle of the cutting blade 220. Because the downward movement of the lead screw 213 will cause the short crossbar 215 to press the connecting block 211 downward, the downward movement of the connecting block 211 will cause the cutting blade 220 to tilt upward through the hinge point, thus changing the angle. Through the above technical solution, the outer sleeve 210 can be moved up and down by driving the connecting sleeve 208, realizing automatic feeding when cutting chamfers. The automation makes it easier to control the feed amount. At the same time, the cutting blade 220 can also change the angle according to the needs, and the angle will not change during feeding, so that the chamfer can be cut more accurately.

[0034] In this embodiment, a lower pressure plate 216 is slidably mounted in the through hole of the mounting plate 222. The lower pressure plate 216 slides radially along the mounting plate 222. A second lead screw 217 is slidably mounted radially on the mounting plate 222. The second lead screw 217 is rotatably connected to the lower pressure plate 216. A small gear 218 is rotatably mounted on the outside of the mounting plate 222. The small gear 218 has a thread inside. The thread cooperates with the second lead screw 217 to drive the second lead screw 217 to move up and down. The second lead screw 217 drives the lower pressure plate 216 to move up and down. A roller 219 is rotatably mounted on one end of the lower pressure plate 216. 9. Extrusion is performed from the outside of the steel pipe. An end face gear 221 is rotatably connected to the side circumference of the mounting plate 222. The end face gear 221 meshes with all the pinions 218. Rotating the end face gear 221 can drive all the pinions 218 to rotate. The rotation of the pinions 218 drives the lead screw 217 to move radially along the mounting plate 222, which in turn drives the lower pressure plate 216 and the roller 219, causing the roller 219 to move up and down and finally fit against the outer circumference of the steel pipe. In this embodiment, the chamfering component 2 can only be used for round steel pipes. If it is a square steel pipe, other chamfering equipment can be used. Through the above technical solution, when the cutting blade 220 chamfers the inside of the steel pipe, the roller 219 extrudes the outside and also rotates with the mounting plate 222 to prevent large deformation of the steel pipe edge during cutting.

[0035] In this embodiment, as Figure 1 , Figure 2As shown, two of the four support legs 5 are equipped with a straightening assembly 3. The straightening assembly 3 includes a rotating sleeve 301. The rotating sleeve 301 is rotatably mounted on the two support legs 5 closest to the clamping device 1. A support rod 302 is hinged to the rotating sleeve 301. A fixing sleeve 303 is connected to the support rod 302. The fixing sleeve 303 and the support rod 302 are connected by a ball joint. In this embodiment, the two fixing sleeves 303 are semi-circular. For circular steel pipes, if supporting square steel pipes, the fixing sleeves 303 can be replaced with corresponding square ones. A reinforcing rod 305 is fixedly mounted on the two support legs 5 closest to the clamping device 1. With the above technical solution, when processing long steel pipes, relying solely on the clamping device 1 can easily cause the steel pipe to bend and deform. The support of the support rod 302 can prevent the steel pipe from deforming, and when not in use, the support rod 302 can be retracted to both sides of the mounting platform 4, saving space.

[0036] Working principle: Taking a round steel pipe as an example, if the steel pipe is short, it can be directly fixed in the clamping device 1. If the steel pipe is long, in order to prevent the steel pipe from deforming due to its own weight, the straightening component 3 is used for support. Rotate the rotating sleeve 301 and the support rod 302, and finally let the fixing sleeve 303 be put on the steel pipe. Then, use bolts to pass through the connecting ear 304 for fixation.

[0037] Before using the straightening assembly 3, the process of fixing the steel pipe to the clamping device 1 is as follows: The upper electric cylinder 105 is activated to move the extrusion seat 102 away from the moving seat 101, placing the steel pipe between the extrusion seat 102 and the moving seat 101. The upper electric cylinder 105 is then activated in the reverse direction, causing the lower end of the extrusion seat 102 to contact the upper end of the moving seat 101. Subsequently, all the small electric cylinders are activated to move the clamping rod 106 towards the center. During this process, the clamping plate 108, near its end, first contacts the steel pipe. This position is located on the outer side of the mating shaft 110 (here, "outer side" refers to the area on the clamping plate 108 that is mating with the steel pipe). The shaft 110 serves as the dividing line, with the side furthest from the center rod 107 being the outer side (the end of the clamping plate 108 also refers to the outer end). This will compress the end of the clamping plate 108, increasing the angle between the two clamping plates 108. The tail of the clamping plate 108 (the end where the clamping plate 108 connects to the center rod 107) will then move in the opposite direction of being compressed. At the same time, the center rod 107 will be pulled out, and the spring 109 will also be stretched. Finally, the shaft 110 will press the clamping plate 108 onto the circumference of the steel pipe, thus fixing the steel pipe. After fixing the steel pipe, the straightening component 3 is used for support.

[0038] Next, adjust the chamfering assembly 2. First, adjust according to the desired chamfering angle by rotating the wheel 214. The wheel 214 drives the lead screw 213 to move up and down, which in turn drives the connecting block 211 to rotate inside the outer sleeve 210 via the short crossbar 215. If one end of the connecting block 211 rotates downward, then one end of the cutting blade 220 rotates upward. The cutting blade 220 and the connecting block 211 are fixedly connected and hinged inside the outer sleeve 210. The hinge point is located between the connecting block 211 and the cutting blade 220. Therefore, if one end of the connecting block 211 is downward, one end of the cutting blade 220 is upward. Adjust the cutting blade 220 to fit against the edge of the inner wall of the steel pipe. Start the short-stroke motor 206. The short-stroke motor 206 drives the vertical connecting rod 207 and the connecting sleeve 208 to move, which in turn drives the short connecting rod 209, causing the outer sleeve 210 to slide radially on the mounting plate 222. At the same time, start the drive motor 205. The lead screw 204 drives the chamfering assembly 2 to move axially. Adjustments in both directions eventually bring the cutting blade 220 into contact with the inner end of the steel pipe. Then, the end face gear 221 is rotated, driving the pinion 218 to rotate. The pinion 218 drives the lead screw 217 and the lower pressure plate 216 to move up and down, causing the roller 219 to contact the outer end of the steel pipe. The main motor 201 is started, driving the mounting plate 222 to rotate, causing the cutting blade 220 to chamfer the inner edge of the steel pipe. At the same time, the roller 219 also follows the cutting blade 220 to synchronously contact and compress to prevent large deformation. During the process, the short-stroke motor 206 drives the vertical connecting rod 207 to move, causing the connecting sleeve 208 to move closer to the mounting plate 222. This causes the short connecting rod 209 to drive the outer sleeve 210 and the cutting blade 220 to move away from the center, allowing the cutting blade 220 to gradually feed from the inside of the steel pipe outwards to cut and chamfer, finally completing the process.

[0039] Although the present invention has been described using the above preferred embodiments, it is not intended to limit the scope of protection of the present invention. Any changes and modifications made by those skilled in the art to the above embodiments without departing from the spirit and scope of the present invention shall still fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be defined by the claims.

Claims

1. An automatic steel pipe chamfering machine, comprising a mounting platform (4), on which a clamping device (1) and a chamfering assembly (2) are mounted, characterized in that, It includes a movable seat (101), on which a pressing seat (102) is slidably mounted. Multiple clamping rods (106) are slidably mounted on the pressing seat (102) and the movable seat (101). The multiple clamping rods (106) all point to the same center. Two clamping plates (108) are mounted on the clamping rods (106). The two clamping plates (108) clamp steel pipes of different shapes by changing their angles.

2. The automatic steel pipe chamfering machine according to claim 1, characterized in that, A central rod (107) is slidably mounted inside the clamping rod (106). A spring (109) is fixedly mounted between the central rod (107) and the clamping rod (106). The central rod (107) is hinged to two clamping plates (108). A torsion spring (112) is fixedly mounted at the hinge position, so that the included angle between the two clamping plates (108) is an obtuse angle.

3. The automatic steel pipe chamfering machine according to claim 2, characterized in that, The clamping rod (106) is fixedly equipped with a mating shaft (110) at its end, and a mating sleeve (111) is fixedly equipped on the clamping plate (108), with the mating shaft (110) sleeved inside the mating sleeve (111).

4. The automatic steel pipe chamfering machine according to claim 1, characterized in that, The chamfering assembly (2) includes a movable plate (203), on which a main motor (201) and an isolation plate (202) are fixedly mounted. A mounting plate (222) is fixedly mounted on the shaft of the main motor (201). The mounting plate (222) has four long through holes arranged radially along the mounting plate (222). An outer sleeve (210) is slidably mounted in the through holes. The outer sleeve (210) slides radially along the mounting plate (222). A cutting blade (220) is installed inside the outer sleeve (210).

5. The automatic steel pipe chamfering machine according to claim 4, characterized in that, A connecting sleeve (208) is fitted on the shaft of the main motor (201). The shaft of the main motor (201) slides and rotates relative to the connecting sleeve (208). A short connecting rod (209) is hinged on the connecting sleeve (208). The short connecting rod (209) is hinged to the outer sleeve (210).

6. The automatic steel pipe chamfering machine according to claim 5, characterized in that, An installation short plate (212) is fixedly mounted on the outer sleeve (210). A lead screw (213) is slidably mounted on the installation short plate (212). A short cross bar (215) is fixedly mounted at the lower end of the lead screw (213). A connecting block (211) is fixedly mounted at the tail of the cutting blade (220). A T-groove is provided in the connecting block (211). The short cross bar (215) moves in the T-groove.

7. An automatic steel pipe chamfering machine according to claim 6, characterized in that, A lower pressure plate (216) is slidably installed in the through hole of the mounting plate (222). The lower pressure plate (216) slides radially along the mounting plate (222). A second lead screw (217) is slidably installed radially on the mounting plate (222). The second lead screw (217) is rotatably connected to the lower pressure plate (216). A small gear (218) is rotatably installed on the outside of the mounting plate (222). The small gear (218) has a thread inside. The thread cooperates with the second lead screw (217) to drive the second lead screw (217) to move up and down. The second lead screw (217) drives the lower pressure plate (216) to move up and down. A roller (219) is rotatably installed on one end of the lower pressure plate (216). The roller (219) squeezes from the outside of the steel pipe.

8. The automatic steel pipe chamfering machine according to claim 1, characterized in that, The lower end of the mounting platform (4) is fixedly equipped with four support legs (5), two of which are equipped with a straightening component (3). The straightening component (3) includes a rotating sleeve (301). The two support legs (5) near the clamping device (1) are rotatably equipped with the rotating sleeve (301). A support rod (302) is hinged to the rotating sleeve (301). A fixing sleeve (303) is connected to the support rod (302). The fixing sleeve (303) and the support rod (302) are connected by a ball joint.

9. An automatic steel pipe chamfering machine according to claim 8, characterized in that, Reinforcing rods (305) are fixedly mounted on the two legs (5) near the clamping device (1).

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