Self-adaptive pipe chamfering device

Abstract

The invention relates to the technical field of pipe machining equipment, in particular to a chamfering device self-adaptive to a pipe, and aims to solve the technical problems of low machining efficiency and product quality reduction caused by the fact that a tool is manually adjusted or replaced to adapt to the size change of the pipe in the prior art. The chamfering device comprises a positioning assembly, a chamfering assembly and a proportional displacement assembly. The positioning assembly comprises a lower pressing plate and an upper pressing plate. The chamfering assembly comprises a rotation unit, and the proportional displacement assembly is in transmission connection with the upper pressing plate and the rotation unit. According to the chamfering device, the moving speed of the upper pressing plate is fixed to be two times of the moving speed of the rotating unit through the proportional displacement assembly, so that the rotating shaft of the rotating unit coincides with the axis of a pipe clamped by the upper pressing plate and the lower pressing plate all the time, and then automatic adjustment of the chamfering assembly is achieved. The technical problems that according to an existing chamfering device, due to the fact that a tool is manually adjusted or replaced to adapt to the size change of the pipe, the machining efficiency is low, and the product quality is reduced are solved.

Description

Technical Field

[0001] The invention relates to the technical field of pipe processing equipment, and in particular to an adaptive pipe chamfering device. Background Art

[0002] In the field of mechanical processing, the chamfering of pipes is an important step to ensure the accuracy and quality of their ends. When the size of the processed pipe changes, the existing chamfering tools can process pipes of different sizes by manually adjusting or replacing the tool, but frequent manual adjustment or replacement of the tool not only increases the complexity and workload of the operation, but also increases the risk of manual errors in repetitive tasks, resulting in reduced processing accuracy and production efficiency.

[0003] The existing chamfering device has the technical problem of low processing efficiency and reduced product quality due to reliance on manual adjustment or replacement of cutters to adapt to changes in pipe size. Summary of the invention

[0004] The purpose of the present invention is to provide an adaptive pipe chamfering device to solve the technical problems in the related art of relying on manual adjustment or replacement of tools to adapt to changes in pipe size, resulting in low processing efficiency and reduced product quality.

[0005] In order to solve the above technical problems, the technical solution provided by the present invention is: The adaptive pipe chamfering device provided by the present invention comprises: A support frame, a positioning assembly, a chamfering assembly and a proportional displacement assembly. The positioning assembly includes a radial clamping unit, and the radial clamping unit includes a lower pressure plate and an upper pressure plate. The lower pressure plate is fixedly mounted on the support frame, and the upper pressure plate and the lower pressure plate move toward each other to press the pipe. The chamfering assembly includes a rotary unit and a grinding unit. The grinding unit includes a grinding wheel that rotates around its own axis, and the rotary unit is used to drive the grinding wheel to rotate around the axis of the pipe to chamfer the pipe. The proportional displacement assembly is mounted on the support frame and is respectively connected to the upper pressure plate and the rotary unit in transmission. The downward movement speed of the upper pressure plate is twice the downward movement speed of the rotary unit.

[0006] Specifically, the proportional displacement assembly includes a first sliding frame, a second sliding frame, and a speed regulation transmission unit. The first sliding frame and the second sliding frame are respectively slidably connected to the support frame. The speed regulation transmission unit includes a first gear, a first rack, a second gear, and a second rack with the same module. The first gear is rotatably connected to the support frame, and the second gear is coaxially arranged with the first gear and rotates synchronously. The first rack is installed on the first sliding frame and meshes with the first gear. The second rack is installed on the second sliding frame and meshes with the second gear. The upper pressure plate is installed on the first sliding frame, and the rotary unit is installed on the second sliding frame. The number of teeth of the first gear is twice that of the second gear, and the moving speed of the upper pressure plate is twice that of the rotary unit.

[0007] Specifically, it further includes a tool adjustment assembly, and the tool adjustment assembly includes an adjustment plate. The rotary unit includes a chamfering motor and a tool rod installed on the output shaft of the chamfering motor. The grinding unit further includes a tool rest, the tool rest is slidably connected to the tool rod, the tool rest is provided with a positioning block, and the grinding wheel is rotatably connected to the tool rest. In the first state, the adjustment plate is attached to the side of the lower pressure plate away from the pipe, and the tool rest drives the grinding wheel to slide along the tool rod through the abutment of the positioning block and the adjustment plate, so as to adjust the distance between the grinding wheel and the chamfering motor.

[0008] Specifically, the lower pressure plate is composed of two support plates and is mirror-symmetrically distributed with the upper pressure plate about the horizontal plane where the output shaft of the chamfering motor is located, forming an open diamond layout centered on the output shaft of the chamfering motor. The adjustment plate is provided with a first positioning surface and a second positioning surface that are parallel to each other. In the first state, the first positioning surface is attached to the support plate, the tool rod is perpendicular to the support plate, and the tool rest drives the grinding wheel to slide along the tool rod through the abutment of the positioning block and the second positioning surface, so as to change the radius of the arc trajectory of the grinding wheel. The normal spacing between the first positioning surface and the second positioning surface is used to determine the chamfering depth of the grinding wheel in the pipe wall thickness direction.

[0009] Specifically, the chamfering assembly further includes a locking unit, and the locking unit includes a first linear driving member, a pressing block, and a wedging block. The wedging block is provided with an inclined surface that cooperates with the pressing block. The first linear driving member is installed on the tool rest and is power-connected to the pressing block for driving the pressing block to move towards the wedging block. When switching from the first state to the second state, the pressing block drives the wedging block to press the tool rod through the extrusion of the inclined surface, so as to realize the locking between the tool rest and the tool rod.

[0010] Specifically, the chamfering assembly further includes a feed unit, which includes a feed slide rail, a feed slider, and a second linear drive. The chamfering motor is mounted on the feed slider, the feed slider is slidably connected to the feed slide rail along the axial direction of the pipe, and the feed slide rail is mounted on the second sliding frame. The second linear drive is dynamically connected to the feed slider, and is used to drive the grinding wheel to approach the pipe.

[0011] Specifically, the positioning assembly further includes an axial limiting unit, the axial limiting unit includes a limiting plate, and the limiting plate is mounted on the second sliding frame. In the first state, the limiting plate achieves axial limiting of the pipe by abutting against the end surface of the pipe.

[0012] Specifically, the axial limiting unit further includes a third linear drive component, which is mounted on the second sliding frame and is dynamically connected to the limiting plate. When the first state is switched to the second state, the third linear drive component drives the limiting plate away from the pipe to avoid interfering with the rotation of the knife rod.

[0013] Specifically, the tool adjustment assembly further includes a tool adjustment slide rail and a fourth linear drive member, the adjustment plate is slidably connected to the tool adjustment slide rail and is dynamically connected to the fourth linear drive member. When the first state is switched to the second state, the fourth linear drive member is used to drive the adjustment plate away from the grinding wheel to avoid interference between the adjustment plate and the grinding wheel.

[0014] Specifically, the grinding unit further comprises a grinding motor and a transmission gear set. The grinding motor is mounted on the tool holder and is connected to the grinding wheel through the transmission gear set, and the transmission gear set is used to avoid interference between the grinding motor and the tool bar.

[0015] Based on the above technical solutions, the beneficial effects of the present invention are analyzed as follows: The present invention provides an adaptive pipe chamfering device, comprising: A support frame, a positioning assembly, a chamfering assembly and a proportional displacement assembly. The positioning assembly includes a radial clamping unit, and the radial clamping unit includes a lower pressure plate and an upper pressure plate. The lower pressure plate is fixedly mounted on the support frame, and the upper pressure plate and the lower pressure plate move toward each other to press the pipe. The chamfering assembly includes a rotary unit and a grinding unit. The grinding unit includes a grinding wheel that rotates around its own axis, and the rotary unit is used to drive the grinding wheel to rotate around the axis of the pipe to chamfer the pipe. The proportional displacement assembly is mounted on the support frame and is respectively connected to the upper pressure plate and the rotary unit in transmission. The downward movement speed of the upper pressure plate is twice the downward movement speed of the rotary unit.

[0016] In specific applications, place the pipe on the lower pressing plate, and the upper pressing plate moves towards the lower pressing plate and abuts against the pipe to form clamping and fixation. At the same time, the proportional displacement assembly power-connected to the upper pressing plate drives the rotary unit to also move towards the lower pressing plate. Since the downward movement speed of the upper pressing plate is twice the downward movement speed of the rotary unit, the rotation axis of the rotary unit always coincides with the axis of the pipe clamped by the upper pressing plate and the lower pressing plate. The rotary unit drives the grinding wheel to rotate around the axis of the pipe to chamfer the pipe.

[0017] It can be seen that compared with the prior art, this chamfering device fixes the moving speed of the upper pressing plate to twice the moving speed of the rotary unit through the proportional displacement assembly, so that the rotation axis of the rotary unit always coincides with the axis of the pipe clamped by the upper pressing plate and the lower pressing plate, thereby realizing the automatic adjustment of the chamfering assembly. It overcomes the technical problems existing in the existing chamfering devices, such as low processing efficiency and poor product quality caused by relying on manual adjustment or tool replacement to adapt to the change of pipe size. Description of the Drawings

[0018] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the following drawings are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0019] Figure 1 Schematic diagram of the overall structure of the chamfering device for adaptive pipes provided by the embodiment of the present invention in the first state Figure 1 ; Figure 2 Schematic diagram of the overall structure of the chamfering device for adaptive pipes in the first state Figure 2 ; Figure 3 Schematic diagram of the overall structure of the chamfering device for adaptive pipes in the first state Figure 3 ; Figure 4 Schematic diagram of the overall structure of the chamfering device for adaptive pipes in the second state Figure 1 ; Figure 5 Schematic diagram of the overall structure of the chamfering device for adaptive pipes in the second state Figure 2 ; Figure 6 Schematic diagram of the overall structure of the chamfering device for adaptive pipes in the second state Figure 3 ; Figure 7 Structural schematic of the locking unit and tool setting component in the first state Figure 1 ; Figure 8 Structural schematic of the locking unit and tool setting component in the first state Figure 2 ; Figure 9 It is a structural schematic diagram of the proportional displacement component.

[0020] Icon: 001, pipe; 100, support frame; 110, guiding slide rail; 120, roller; 200, positioning component; 210, radial clamping unit; 211, lower pressing plate; 2111, support plate; 212, upper pressing plate; 220, axial limiting unit; 221, limiting plate; 201, positioning groove; 222, third linear driving member; 300, chamfering component; 310, rotating unit; 311, chamfering motor; 312, tool rod; 320, grinding unit; 321, grinding wheel; 322, tool rest; 301, positioning block; 323, grinding motor; 324, transmission gear set; 3241, third gear; 3242, fourth gear; 330, locking unit; 331, first linear driving member; 332, pressing block; 333, wedging block; 302, inclined surface; 303, notch; 340, feed unit; 341, feed slide rail; 342, feed slider; 343, second linear driving member; 400, proportional displacement component; 410, first sliding frame; 420, second sliding frame; 430, speed regulation transmission unit; 431, first gear; 432, first rack; 433, second gear; 434, second rack; 440, driving motor; 500, tool setting component; 510, adjusting plate; 501, first positioning surface; 502, second positioning surface; 520, tool setting slide rail; 530, fourth linear driving member. Detailed implementation manners

[0021] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some but not all of the embodiments of the present invention. Usually, the components of the embodiments of the present invention described and illustrated herein can be arranged and designed in various different configurations.

[0022] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] Some embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0024] The existing chamfering device has the technical problem of low processing efficiency and reduced product quality due to reliance on manual adjustment or replacement of cutters to adapt to changes in pipe size.

[0025] In view of this, the present invention provides an adaptive pipe chamfering device, comprising: Support frame 100, positioning assembly 200, chamfering assembly 300 and proportional displacement assembly 400. Positioning assembly 200 includes radial clamping unit 210, radial clamping unit 210 includes lower pressing plate 211 and upper pressing plate 212, lower pressing plate 211 is fixedly mounted on support frame 100, and the upper pressing plate 212 and lower pressing plate 211 move toward each other to press pipe 001. Chamfering assembly 300 includes rotating unit 310 and grinding unit 320, grinding unit 320 includes grinding wheel 321 rotating around its own axis, rotating unit 310 is used to drive grinding wheel 321 to rotate around the axis of pipe 001 to chamfer pipe 001. Proportional displacement assembly 400 is mounted on support frame 100 and is respectively connected to upper pressing plate 212 and rotating unit 310 in transmission, and the downward movement speed of upper pressing plate 212 is twice the downward movement speed of rotating unit 310.

[0026] Based on the above technical solutions, the adaptive pipe chamfering device provided by the present invention can achieve the following technical effects: The chamfering device fixes the moving speed of the upper pressing plate 212 to twice the moving speed of the rotary unit 310 through the proportional displacement assembly 400, so that the rotation axis of the rotary unit 310 always coincides with the axis of the pipe 001 clamped by the upper pressing plate 212 and the lower pressing plate 211, thereby realizing the automatic adjustment of the chamfering assembly 300. The technical problem of low processing efficiency and reduced product quality caused by relying on manual adjustment or replacement of tools to adapt to changes in pipe size in existing chamfering devices is overcome.

[0027] The following combination Figures 1 to 9 The structure and shape of the adaptive pipe chamfering device provided in this embodiment are described in detail: How does the proportional displacement assembly 400 achieve that the downward movement speed of the upper pressing plate 212 is twice the downward movement speed of the rotary unit 310? Specifically: The proportional displacement assembly 400 includes a first sliding frame 410, a second sliding frame 420, a speed regulation transmission unit 430 and a driving motor 440. The support frame 100 is provided with a guiding slide rail 110. The first sliding frame 410 and the second sliding frame 420 are respectively slidably connected to the guiding slide rail 110, and the driving motor 440 is power-connected to the speed regulation transmission unit 430. The speed regulation transmission unit 430 includes a first gear 431, a first rack 432, a second gear 433 and a second rack 434 with the same module. The first gear 431 is rotatably connected to the support frame 100, and the second gear 433 is coaxially arranged with the first gear 431 and rotates synchronously. The first rack 432 is mounted on the first sliding frame 410 and meshes with the first gear 431, and the second rack 434 is mounted on the second sliding frame 420 and meshes with the second gear 433. The upper pressing plate 212 is mounted on the first sliding frame 410, and the rotary unit 310 is mounted on the second sliding frame 420. The number of teeth of the first gear 431 is twice that of the second gear 433, and the moving speed of the upper pressing plate 212 is twice that of the rotary unit 310. Among them, the driving motor 440 can be arranged to be coaxially connected to the first gear 431.

[0028] In order to correct the radius of the circular motion trajectory of the grinding wheel 321 to match the size of the pipe 001, in the solution of this embodiment, the chamfering device for adapting to the pipe further includes a tool adjusting assembly 500, and the tool adjusting assembly 500 includes an adjusting plate 510. The rotary unit 310 includes a chamfering motor 311 and a tool rod 312 mounted on the output shaft of the chamfering motor 311. The grinding unit 320 further includes a tool holder 322. The tool holder 322 is slidably connected to the tool rod 312. The tool holder 322 is provided with a positioning block 301, and the grinding wheel 321 is rotatably connected to the tool holder 322. In the first state, the adjusting plate 510 abuts against the side of the lower pressing plate 211 away from the pipe 001. The tool holder 322 drives the grinding wheel 321 to slide along the tool rod 312 through the abutment of the positioning block 301 and the adjusting plate 510, so as to adjust the distance between the grinding wheel 321 and the chamfering motor 311, and further adjust the radius of the circular motion trajectory of the grinding wheel 321.

[0029] Regarding how the adjusting plate 510 realizes changing the radius of the circular arc trajectory of the grinding wheel 321 according to the size of the pipe 001, specifically: The lower pressing plate 211 is composed of two supporting plates 2111, and is mirror-symmetrically distributed with the upper pressing plate 212 about the horizontal plane where the output shaft of the chamfering motor 311 is located, forming an open diamond layout centered on the output shaft of the chamfering motor 311. The pipe 001 is tangent to the supporting plate 2111. The adjusting plate 510 is provided with a first positioning surface 501 and a second positioning surface 502 that are parallel to each other. In the first state, the first positioning surface 501 fits against the supporting plate 2111, the tool bar 312 is perpendicular to the supporting plate 2111, and the tool holder 322 drives the grinding wheel 321 to slide along the tool bar 312 by the abutment of the positioning block 301 against the second positioning surface 502, thereby changing the arc trajectory radius of the grinding wheel 321. The normal spacing between the first positioning surface 501 and the second positioning surface 502 is used to determine the chamfering depth of the grinding wheel 321 in the wall thickness direction of the pipe 001.

[0030] In order to keep the arc trajectory radius of the grinding wheel 321 fixed during the chamfering operation, in the solution of this embodiment, the chamfering assembly 300 further includes a locking unit 330. The locking unit 330 includes a first linear driving member 331, a pressing block 332, and a wedging block 333. The wedging block 333 is provided with an inclined surface 302 that cooperates with the pressing block 332. The first linear driving member 331 is installed on the tool holder 322 and is power-connected to the pressing block 332 for driving the pressing block 332 to move towards the wedging block 333. When switching from the first state to the second state, the pressing block 332 drives the wedging block 333 to press the tool bar 312 through the extrusion of the inclined surface 302, thereby realizing the locking between the tool holder 322 and the tool bar 312. Among them, the wedging block 333 is further provided with a notch 303, and the notch 303 is used to avoid the first linear driving member 331.

[0031] In the solution of this embodiment, the chamfering assembly 300 further includes a feed unit 340. The feed unit 340 includes a feed slide rail 341, a feed slider 342, and a second linear driving member 343. The chamfering motor 311 is installed on the feed slider 342. The feed slider 342 is slidably connected to the feed slide rail 341 along the axial direction of the pipe 001, and the feed slide rail 341 is installed on the second sliding frame 420. The second linear driving member 343 is power-connected to the feed slider 342 for driving the grinding wheel 321 to approach the pipe 001.

[0032] In order to realize the axial limit of the pipe 001, in the solution of this embodiment, the positioning assembly 200 further includes an axial limit unit 220. The axial limit unit 220 includes a limit plate 221. The limit plate 221 is installed on the second sliding frame 420, and the limit plate 221 is further provided with a positioning groove 201. In the first state, the limit plate 221 realizes the axial limit of the pipe 001 by abutting against the end face of the pipe 001. Among them, the positioning groove 201 is used to avoid the tool bar 312, and the abutment between the side wall of the positioning groove 201 and the tool bar 312 is used to guide the tool bar 312, so that the tool bar 312 is perpendicular to the supporting plate 2111.

[0033] In order to avoid interference between the limit plate 221 and the rotation of the tool bar 312 during the chamfering operation, in the solution of this embodiment, the axial limit unit 220 further includes a third linear driving member 222, and the third linear driving member 222 is installed on the second sliding frame 420 and is power-connected to the limit plate 221. When switching from the first state to the second state, the third linear driving member 222 drives the limit plate 221 away from the pipe 001 to avoid interference with the rotation of the tool bar 312.

[0034] In order to avoid interference between the adjusting plate 510 and the grinding wheel 321 during the chamfering operation, in the solution of this embodiment, the tool adjusting assembly 500 further includes a tool adjusting slide rail 520 and a fourth linear driving member 530. The adjusting plate 510 is slidably connected to the tool adjusting slide rail 520 and is power-connected to the fourth linear driving member 530. When switching from the first state to the second state, the fourth linear driving member 530 is used to drive the adjusting plate 510 away from the grinding wheel 321 to avoid interference between the adjusting plate 510 and the grinding wheel 321.

[0035] In the solution of this embodiment, the grinding unit 320 further includes a grinding motor 323 and a transmission gear set 324. The transmission gear set 324 includes a third gear 3241 and a fourth gear 3242. The third gear 3241 is coaxially arranged with the grinding wheel 321. The grinding motor 323 is installed on the tool rest 322, and the fourth gear 3242 is installed at the output end of the grinding motor 323 and meshes with the third gear 3241. The grinding motor 323 is power-connected to the grinding wheel 321 through the meshing of the fourth gear 3242 and the third gear 3241, and the transmission gear set 324 is used to avoid interference between the grinding motor 323 and the tool bar 312.

[0036] In the solution of this embodiment, the support frame 100 is further provided with rollers 120. The rollers 120 are provided with V-shaped grooves, and the V-shaped grooves are aligned with the lower pressing plate 211 in the axial direction of the pipe 001 for supporting the pipe 001 and facilitating the movement of the pipe 001 along its own axial direction.

[0037] In summary, the specific working process of the chamfering device for adapting to pipes provided in this embodiment is as follows: Taking the initial state as the first state as an example. Place the pipe 001 on the lower pressing plate 211 and push it along the axial direction until it abuts against the limiting plate 221. Drive the motor 440 to drive the first gear 431 and the second gear 433 to rotate and respectively drive the first sliding frame 410 and the second sliding frame 420 to slide towards the lower pressing plate 211 through the first rack 432 and the second rack 434. During the movement of the rotary unit 310 towards the lower pressing plate 211, since the tool bar 312 is perpendicular to the support plate 2111 and the pipe 001 is tangent to the support plate 2111, the tool rest 322 drives the grinding wheel 321 to slide along the tool bar 312 towards the chamfering motor 311 through the abutment of the positioning block 301 and the second positioning surface 502 to adapt to the size of the pipe 001 clamped by the upper pressing plate 212 and the lower pressing plate 211.

[0038] When switching from the first state to the second state, the first linear driving member 331 drives the pressing block 332 to drive the wedging block 333 to press the tool bar 312 through the extrusion of the inclined surface 302, locking the tool rest 322 and the tool bar 312. The third linear driving member 222 drives the limiting plate 221 away from the pipe 001, and the fourth linear driving member 530 drives the adjusting plate 510 away from the grinding wheel 321 to avoid interfering with the rotation of the tool bar 312.

[0039] The grinding motor 323 drives the grinding wheel 321 to rotate around its own axis through the transmission gear set 324, and the chamfering motor 311 drives the grinding wheel 321 to rotate around the axis of the pipe 001 through the tool bar 312. The second linear driving member 343 drives the feed slider 342 to slide along the feed slide rail 341 to drive the chamfering motor 311 to approach the pipe 001, thereby driving the grinding wheel 321 to chamfer the pipe 001.

[0040] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An adaptive chamfering device for pipes, characterized in that, include: A support frame (100), a positioning assembly (200), a chamfering assembly (300) and a proportional displacement assembly (400); The positioning assembly (200) comprises a radial clamping unit (210), the radial clamping unit (210) comprising a lower pressing plate (211) and an upper pressing plate (212), the lower pressing plate (211) being fixedly mounted on the support frame (100), and the upper pressing plate (212) and the lower pressing plate (211) moving towards each other to compress the pipe (001); The chamfering assembly (300) comprises a rotating unit (310) and a grinding unit (320); the grinding unit (320) comprises a grinding wheel (321) that rotates around its own axis; the rotating unit (310) is used to drive the grinding wheel (321) to rotate around the axis of the pipe (001) to chamfer the pipe (001); The proportional displacement assembly (400) is mounted on the support frame (100) and is respectively transmission-connected to the upper pressing plate (212) and the rotary unit (310); the downward movement speed of the upper pressing plate (212) is twice the downward movement speed of the rotary unit (310).

2. The chamfering device according to claim 1, characterized in that: The proportional displacement assembly (400) comprises a first sliding frame (410), a second sliding frame (420) and a speed regulating transmission unit (430); the first sliding frame (410) and the second sliding frame (420) are respectively slidably connected to the support frame (100); The speed regulating transmission unit (430) comprises a first gear (431), a first rack (432), a second gear (433) and a second rack (434) having the same modulus, the first gear (431) being rotatably connected to the support frame (100), and the second gear (433) being coaxially arranged with the first gear (431) and rotating synchronously; The first rack (432) is mounted on the first sliding frame (410) and meshes with the first gear (431), and the second rack (434) is mounted on the second sliding frame (420) and meshes with the second gear (433); The upper pressing plate (212) is mounted on the first sliding frame (410), and the rotary unit (310) is mounted on the second sliding frame (420); The number of teeth of the first gear (431) is twice the number of teeth of the second gear (433), and the moving speed of the upper pressing plate (212) is twice the moving speed of the rotating unit (310).

3. The chamfering device according to claim 2, characterized in that: Also included is a knife adjustment assembly (500), wherein the knife adjustment assembly (500) comprises an adjustment plate (510); The rotary unit (310) comprises a chamfering motor (311) and a tool rod (312) mounted on an output shaft of the chamfering motor (311); The grinding unit (320) further includes a tool rest (322), the tool rest (322) is slidably connected to the tool bar (312), the tool rest (322) is provided with a positioning block (301), and the grinding wheel (321) is rotatably connected to the tool rest (322); In the first state, the adjusting plate (510) is attached to the side of the lower pressing plate (211) away from the pipe (001), and the tool rest (322) drives the grinding wheel (321) to slide along the tool bar (312) through the abutment of the positioning block (301) and the adjusting plate (510), so as to adjust the distance between the grinding wheel (321) and the chamfering motor (311).

4. The chamfering device according to claim 3, wherein: The lower pressing plate (211) is composed of two support plates (2111) and is mirror-symmetrically distributed with the upper pressing plate (212) about the horizontal plane where the output shaft of the chamfering motor (311) is located, forming an open diamond layout centered on the output shaft of the chamfering motor (311); The adjusting plate (510) is provided with a first positioning surface (501) and a second positioning surface (502) that are parallel to each other; In the first state, the first positioning surface (501) is attached to the support plate (2111), the tool bar (312) is perpendicular to the support plate (2111), and the tool rest (322) drives the grinding wheel (321) to slide along the tool bar (312) through the abutment of the positioning block (301) and the second positioning surface (502), so as to change the arc trajectory radius of the grinding wheel (321); The normal spacing between the first positioning surface (501) and the second positioning surface (502) is used to determine the chamfering depth of the grinding wheel (321) in the wall thickness direction of the pipe (001).

5. The chamfering device according to claim 3, wherein: The chamfering assembly (300) further includes a locking unit (330), the locking unit (330) includes a first linear driving member (331), a pressing block (332) and a wedging block (333), and the wedging block (333) is provided with an inclined surface (302) that cooperates with the pressing block (332); The first linear driving member (331) is installed on the tool rest (322) and is power-connected to the pressing block (332) for driving the pressing block (332) to move towards the wedging block (333); When switching from the first state to the second state, the pressing block (332) drives the wedging block (333) to press the tool bar (312) through the extrusion of the inclined surface (302), so as to lock the tool rest (322) and the tool bar (312).

6. The chamfering device according to claim 5, wherein: The chamfering assembly (300) further includes a feed unit (340), the feed unit (340) includes a feed slide rail (341), a feed slider (342) and a second linear driving member (343); The chamfering motor (311) is installed on the feed slider (342), and the feed slider (342) is slidably connected to the feed slide rail (341) along the axial direction of the pipe (001), and the feed slide rail (341) is installed on the second sliding frame (420); The second linear driving member (343) is power-connected to the feed slider (342) and is used to drive the grinding wheel (321) close to the pipe (001).

7. The chamfering device according to claim 4, wherein: The positioning assembly (200) further includes an axial limiting unit (220), and the axial limiting unit (220) includes a limiting plate (221), and the limiting plate (221) is installed on the second sliding frame (420); In the first state, the limiting plate (221) realizes axial limitation of the pipe (001) by abutting against the end face of the pipe (001).

8. The chamfering device according to claim 7, wherein: The axial limiting unit (220) further includes a third linear driving member (222), and the third linear driving member (222) is installed on the second sliding frame (420) and is power-connected to the limiting plate (221); When switching from the first state to the second state, the third linear driving member (222) drives the limiting plate (221) away from the pipe (001) to avoid interfering with the rotation of the tool bar (312).

9. The chamfering device according to claim 3, wherein: The tool adjusting assembly (500) further includes a tool adjusting slide rail (520) and a fourth linear driving member (530), and the adjusting plate (510) is slidably connected to the tool adjusting slide rail (520) and is power-connected to the fourth linear driving member (530); When switching from the first state to the second state, the fourth linear driving member (530) is used to drive the adjusting plate (510) away from the grinding wheel (321) to avoid interference between the adjusting plate (510) and the grinding wheel (321).

10. The chamfering device according to claim 3, wherein: The grinding unit (320) further includes a grinding motor (323) and a transmission gear set (324); The grinding motor (323) is installed on the tool rest (322) and is power-connected to the grinding wheel (321) through the transmission gear set (324), and the transmission gear set (324) is used to avoid interference between the grinding motor (323) and the tool bar (312).

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