Axial polishing mechanism and steel pipe inner wall polishing machine comprising same

Abstract

The invention discloses an axial polishing mechanism and a steel pipe inner wall polishing machine comprising the same. The axial polishing mechanism comprises a support, a polishing disc, a driving assembly, a supporting mechanism and an inclined driving mechanism. The top face of the support is obliquely arranged, and a moving assembly used for adjusting the position of the driving assembly is installed between the bottom end of the driving assembly and the top face of the support. The driving assembly comprises a rotating chuck and a motor driving the rotating chuck to rotate, the rotating chuck is connected with a rotating shaft capable of stretching and retracting in the axial direction, and the tail end of the rotating shaft is fixedly connected with a grinding disc. The axial polishing mechanism belongs to the technical field of metal polishing and has the technical effects that the inclination angle of a steel pipe is dynamically adjusted through the inclination driving mechanism, so that scrap iron generated by polishing is continuously guided out of a pipe cavity under the action of gravity and centrifugal force; the pipe diameter self-adaption mechanism is restrained by the combined motion of an inclined groove and a transverse groove, synchronous lifting of the supporting height is forcibly achieved when the distance between driven rollers is enlarged, and it is guaranteed that the inner walls of steel pipes with different diameters make contact with a grinding disc all the time.

Description

Technical Field

[0001] The invention relates to the technical field of metal polishing, in particular to an axial polishing mechanism and a steel pipe inner wall polishing machine containing the mechanism. Background Art

[0002] Polishing is a processing method that uses polishing tools to modify the surface of the workpiece to improve the brightness and flatness of the workpiece surface. The polishing mechanism is the component structure of the polishing equipment; After production, the steel pipe needs to be deburred and the inner and outer walls of the steel pipe that have been used for a long time will produce rust and also need to be polished; The existing polishing method is to use a motor to drive the grinding head to extend to the inner wall of the steel pipe for polishing; the steel pipe is placed horizontally, so that the iron chips and impurities polished off will be deposited at the bottom of the inner wall of the steel pipe. During the polishing process, a large amount of iron chips will be involved in the contact surface between the grinding head and the inner wall of the steel pipe, forming secondary scratches, which directly affects the polishing quality, efficiency and safety.

[0003] Therefore, the existing demand is not met, and we have proposed an axial polishing mechanism and a steel pipe inner wall polishing machine containing the mechanism. Summary of the Invention

[0004] To this end, the present invention provides an axial polishing mechanism and a battery module containing the mechanism to solve the above-mentioned problems in the prior art.

[0005] In order to achieve the above object, the present invention provides the following technical solutions: According to a first aspect of the present invention, an axial polishing mechanism includes a bracket, a grinding disc, a drive assembly, a support mechanism, and a tilting drive mechanism; The top surface of the bracket is inclined, and a moving assembly for adjusting its position is installed between the bottom end of the driving assembly and the top surface of the bracket; the driving assembly includes a rotating chuck and a motor driving the rotating chuck, the rotating chuck is connected to an axially retractable rotating shaft, and the end of the rotating shaft is fixedly connected to the grinding disc; The support mechanism includes a horizontal plate and a support frame on top thereof, with inclined slots provided on both sides of the support frame, an adjustment block slidably connected in the inclined slot, the adjustment block rotatably connected to the driven roller, the adjustment block being connected to the telescopic rod via the lifting frame, and the lifting frame is driven by the telescopic rod to link the adjustment block, so that the two driven rollers are synchronously raised in height when the distance between them is increased, ensuring that the inner walls of steel pipes of different diameters are always in contact with the grinding disc; The rotating shaft is detachably connected to the extension rod, and the rotating chuck is provided with a transverse guide groove which is slidably engaged with the transverse guide block of the rotating shaft / extension rod; A sliding assembly is provided on the side of the driving assembly, which drives the rotating shaft to feed axially through rolling locking between the U-shaped clamping plate and the annular clamping groove of the rotating shaft / extension rod.

[0006] Furthermore, the adjustment block is composed of a slider 1, a circular connecting sleeve and a slider 2. The slider 1 slides obliquely along the inclined groove, and the slider 2 slides horizontally along the transverse groove of the lifting frame, forming a forced motion chain of spacing expansion and height lifting.

[0007] Furthermore, the lifting frame is fixedly connected to the lifting plate via a connecting rod, and both ends of the telescopic rod are respectively fixed to the bottom of the lifting plate and the top of the horizontal plate.

[0008] Furthermore, the rotary chuck is provided with a through hole, an annular array of transverse guide grooves are provided on the inner wall of the through hole, and transverse guide blocks are provided on the outer walls of the rotating shaft and the extension rod accordingly.

[0009] Furthermore, a ball is embedded in the inner wall of the U-shaped card plate and rolls with the annular rolling groove of the rotating shaft / extension rod, and the U-shaped card plate is connected to the telescopic rod to control the opening and closing.

[0010] Furthermore, the telescopic rod four is fixedly connected to the movable plate, an L-shaped plate is provided below the movable plate, a telescopic rod five is installed on the side wall of the L-shaped plate, and an output end of the telescopic rod five is connected to the movable plate.

[0011] Furthermore, the support mechanism includes a driving roller, which is pressed against the surface of the steel pipe through a telescopic rod and is connected to a driving motor via a pulley and a belt.

[0012] Furthermore, a resistance mechanism is provided on one side of the driving roller to constrain the axial displacement of the steel pipe.

[0013] Furthermore, the moving assembly includes a support frame fixedly mounted on the top of the bracket, a telescopic rod six fixedly mounted on the side wall of the support frame, the output end of the telescopic rod six is fixedly connected to the bottom end of the moving frame, sliding sleeves are fixedly mounted on both sides of the bottom end of the moving frame, guide rails are fixedly mounted on both sides of the top of the support frame, the inner wall of the sliding sleeve is slidably connected to the outer wall of the guide rail, and the movement of the support frame is guided by the sliding connection between the sliding sleeve and the guide rail.

[0014] A steel pipe inner wall polishing machine with an axial polishing mechanism, using the axial polishing mechanism The present invention has the following advantages: The invention relates to an axial polishing mechanism, which dynamically adjusts the inclination angle of the steel pipe through an inclined driving mechanism, so that the iron chips generated by polishing are continuously discharged from the pipe cavity under the action of gravity and centrifugal force, completely avoiding secondary scratches caused by the iron chips; its pipe diameter adaptive mechanism uses the compound motion constraint of the inclined groove and the transverse groove to force the support height to be raised synchronously when the spacing between the driven rollers is expanded, ensuring that the inner walls of steel pipes of different diameters always keep in contact with the grinding disc; in conjunction with the modular shaft extension system, through the torque transmission of the detachable extension rod and the rolling locking axial sliding mechanism, it breaks through the traditional shaft length limitation, and the three functional modules work together organically to simultaneously overcome the problems of iron chip accumulation, pipe diameter compatibility and ultra-long pipe processing, and significantly improve the surface finish and processing continuity. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a front view of an axial polishing mechanism proposed by the present invention; Figure 2 for Figure 1 Exploded schematic main view; Figure 3 for Figure 1 Exploded schematic front view of the middle drive mechanism; Figure 4 This is the main view of the support frame; Figure 5 To adjust the main view of the block; Figure 6 This is the main view of the driving roller; Figure 7 This is the main view of the L-shaped plate; Figure 8 This is a cross-sectional view of the through hole.

[0016] In the figure: 1. bracket; 201. grinding disc; 202. rotating shaft; 3. driving mechanism; 301. moving frame; 4. driving assembly; 401. motor; 402. rotating chuck; 403. through hole; 404. transverse guide groove; 405. transverse guide block; 406. annular groove; 407. annular rolling groove; 408. U-shaped clamping plate; 409. moving plate; 410. telescopic rod 4; 411. ball bearing; 412. guide rod; 413. L-shaped plate; 414. telescopic rod 5; 415. extension rod; 5. moving assembly ; 501, support frame; 502, guide rail; 503, sliding sleeve; 504, telescopic rod six; 601, cross plate; 602, support frame; 603, driven roller; 604, driving roller; 605, U-shaped frame one; 606, telescopic rod one; 607, U-shaped frame two; 608, driving motor; 609, roller; 610, rotating shaft one; 611, pulley; 612, belt; 7, resisting mechanism; 701, resisting plate; 702, L-shaped frame; 703, telescopic rod two; 8, adjusting mechanism; 801, chute; 802, adjustment block; 803, slider 1; 804, slider 2; 805, circular connecting sleeve; 806, lifting frame; 807, transverse slot; 808, connecting rod; 809, lifting plate; 810, telescopic rod; 811, temporary residue storage tank; 9, tilting drive mechanism; 901, telescopic rod 3; 902, support rod; 903, limit frame. DETAILED DESCRIPTION

[0017] The following describes the implementation of the present invention using specific embodiments. Those skilled in the art will readily understand the other advantages and benefits of the present invention from the disclosure herein. Obviously, the embodiments described are only a portion of the present invention, not all of it. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are intended to fall within the scope of protection of the present invention.

[0018] Example 1; Reference Figures 1-8 An axial polishing mechanism includes a bracket 1, the top surface of the bracket 1 is inclined, a grinding disc 201 is provided on the left side of the top of the bracket 1, and a driving mechanism 3 connected to the grinding disc 201 for driving the grinding disc 201 to rotate and move; A support mechanism for placing the steel pipe and driving the steel pipe to rotate is provided on the right side of the bracket 1. The bottom of the support mechanism is connected to a tilting drive mechanism 9 for driving the support mechanism to tilt to fit the grinding disc 201. When in use, the steel pipe is placed on the support mechanism, and the tilting drive mechanism 9 is controlled to drive the steel pipe placed on the support mechanism to tilt, and then the inner wall of the steel pipe is polished in cooperation with the grinding disc 201 driven by the drive mechanism 3; Specifically: the driving mechanism 3 includes a mobile frame 301, a mobile assembly 5 is installed between the bottom end of the mobile frame 301 and the top of the bracket 1, and a driving assembly 4 is installed on the mobile frame 301. The driving assembly 4 includes a motor 401 fixedly installed on the top left side of the mobile frame 301, and a rotating chuck 402 is rotatably connected to the lower right side of the mobile frame 301. The output end of the motor 401 is transmission-connected to the rotating chuck 402; the inner side of the rotating chuck 402 is fixedly clamped with a rotating shaft 202, and the output end of the rotating shaft 202 is fixedly connected to the grinding disc 201; When in use, the motor 401 drives the rotary chuck 402 to rotate, and the rotary chuck 402 drives the rotating shaft 202 and the grinding disc 201 fixedly connected to the output end of the rotating shaft 202 to rotate. At the same time, the control moving component 5 drives the moving frame 301 and the grinding disc 201 rotating on the moving frame 301 to grind and polish the inner wall of the steel pipe; The moving assembly 5 includes: a support frame 501 fixedly mounted on the top of the bracket 1, a telescopic rod 504 fixedly mounted on the side wall of the support frame 501, an output end of the telescopic rod 504 fixedly connected to the bottom end of the moving frame 301, a sliding sleeve 503 fixedly mounted on both sides of the bottom end of the moving frame 301, and a guide rail 502 fixedly mounted on both sides of the top of the support frame 501, the inner wall of the sliding sleeve 503 being slidably connected to the outer wall of the guide rail 502, and the movement of the support frame 501 is guided by the sliding connection between the sliding sleeve 503 and the guide rail 502; when in use, the telescopic rod 504 is controlled to move to drive the support frame 501 to move, thereby driving the support frame 501 and the driving mechanism 3 mounted on the support frame 501 to move; The support mechanism includes a horizontal plate 601, with support frames 602 fixedly connected to both sides of the top of the horizontal plate 601, and driven rollers 603 rotatably connected to both sides of the support frame 602. A driving roller 604 is provided above the middle of the two driven rollers 603, and the top of the driving roller 604 is connected to a telescopic rod 606 with a belt for lifting and lowering. When in use, the steel pipe is placed above the two driven rollers 603, and then the telescopic rod 606 is controlled to push the driving roller 604 down to contact the top of the steel pipe, and the steel pipe is driven to rotate through the driving roller 604. The top of the telescopic rod 606 is connected to a U-shaped frame 605; The tilt drive mechanism 9 includes a limit frame 903 fixedly mounted on both sides of the bottom end of the horizontal plate 601, and the inner wall of the limit frame 903 is slidably connected to a push rod 902. A telescopic rod 3 901 is provided below the push rod 902. The bottom end of the telescopic rod 3 901 is rotatably connected to the bottom end of the inner wall of the bracket 1, and the output end is fixedly connected to the push rod 902. The right end of the horizontal plate 601 is rotatably connected to the bracket 1. When in use, the telescopic rod 3 901 is controlled to extend or retract to drive one end of the horizontal plate 601 to rise or fall, thereby adjusting the tilt angle of the horizontal plate 601. Secondary specifics: the driving roller 604 includes a U-shaped frame 607, the top of the U-shaped frame 607 is fixedly connected to the output end of the telescopic rod 606, and a roller 609 is provided on the inner side of the U-shaped frame 607. Both ends of the roller 609 are fixedly connected to the rotating shaft 610, and the outer wall of the rotating shaft 610 is rotatably connected to the inner side of the U-shaped frame 607. A driving motor 608 is installed above one side of the U-shaped frame 607, and the output end of the driving motor 608 and the outer wall of the rotating shaft 610 are fixedly installed with a pulley 611, and the two pulleys 611 are connected by a belt 612. When in use, the telescopic rod 606 is controlled to push the driving roller 604 down to contact the top of the steel pipe, and the driving motor 608 is controlled to drive the roller 609 to rotate through the two pulleys 611 and a group of belts 612, and the steel pipe is rotated through the roller 609. Furthermore, the above solution does not provide resistance on one side of the steel pipe. When the steel pipe tilts, the steel pipe will move downward. For this purpose, a resistance mechanism 7 is provided on the side wall of the second U-shaped frame 607. The resistance mechanism 7 includes an L-shaped frame 702 fixedly mounted on the side wall of the second U-shaped frame 607. A second telescopic rod 703 is fixedly mounted on the inner side of the L-shaped frame 702. The output end of the second telescopic rod 703 passes through the L-shaped frame 702 and is fixedly connected to a resistance plate 701. When in use, the second telescopic rod 703 is controlled to drive the resistance plate 701 to move against the end of the steel pipe on the lower side to restrict it. Working principle: first, the steel pipe is loaded onto the driven roller 603 of the supporting mechanism, and the cross plate 601 is pushed by the telescopic rod three 901 in the tilting driving mechanism 9 to adjust the inclination angle of the steel pipe so that its axis is precisely matched with the rotation axis of the grinding disc; then the telescopic rod one 606 in the driving roller 604 presses the roller 609 down to contact the surface of the steel pipe, and the driving motor 608 drives the steel pipe to rotate at a uniform speed through the belt 612, while the telescopic rod two 703 of the resisting mechanism 7 pushes the resisting plate 701 against the lower end face of the steel pipe to prevent axial slippage; finally, the motor 401 of the driving mechanism 3 drives the rotating chuck 402 and the grinding disc 201 to rotate at high speed, and the telescopic rod six 504 in the moving component 5 pushes the supporting frame 501 to feed axially along the guide rail 502, so that the rotating grinding disc 201 completes the reciprocating polishing motion in the inner cavity of the steel pipe, thereby realizing the coordinated processing of the steel pipe rotation and the axial feeding of the grinding disc; Due to the inclination of the steel pipe, the iron chips will fall downward during grinding. At the same time, the steel pipe will rotate, driving the iron chips to move downward and finally be discharged. The dynamic chip removal design of the trinity of inclination + rotation + opening direction fundamentally reduces the problem of secondary damage to the inner wall by iron chips during polishing, while achieving a triple improvement in quality, efficiency and safety. Example 2: The technical problem of the above scheme is that it can only polish and grind steel pipes of fixed diameter. If the diameter of the steel pipe is changed, the following problems will occur: 1. The fixed support of the two driven rollers 603 is unstable; 2. If the bottom surface of the grinding disc 201 cannot release the inner wall of the steel pipe, the axis of the steel pipe and the grinding disc 201 will not be parallel when the angle of the horizontal plate 601 is adjusted, which affects the subsequent grinding. In order to solve the above problems, it is further: refer to Figure 4 、 Figure 5 An axial polishing mechanism is provided with an adjustment mechanism 8 on both sides of the support frame 602. The adjustment mechanism 8 includes an inclined groove 801 provided on both sides of the support frame 602. The inner wall of the inclined groove 801 is slidably connected to a slider 1 803. The inner side of the slider 1 803 is rotatably connected to the end of the driven roller 603. A circular connecting sleeve 805 is fixedly connected to the outer side of the slider 1 803, and a slider 2 804 is fixedly connected to the outer side of the circular connecting sleeve 805. The slider 1 803, the circular connecting sleeve 805 and the slider 2 804 form an adjustment block 802. A lifting plate 809 is provided below the support frame 602. A residue temporary storage groove 811 is provided on the inner side of the top of the lifting plate 809. Connecting rods 808 are fixedly connected to both sides of the top of the lifting plate 809. The top of the connecting rod 808 is fixedly connected to the lifting frame 806. A transverse groove 807 is provided on both sides of the lifting frame 806. The inner wall of the transverse groove 807 is slidably connected to the outer wall of the slider 2 804. The bottom of the lifting plate 809 is fixedly connected to both sides with telescopic rods 810, and the bottom of the telescopic rods 810 is fixedly connected to the top of the horizontal plate 601; During use, the telescopic rod 810 is controlled to extend to drive the lifting plate 809 and the lifting frame 806 to rise. The rise of the lifting frame 806 will drive the second slider 804 to rise, and the second slider 804 will move along the upper outer side of the inclined groove 801. At the same time, the first slider 803 will also drive the second slider 804 to move along the transverse groove 807. In this way, the distance between the two driven rollers 603 will become larger, and the support for the steel pipe with a large diameter will be more stable. At the same time, if only the distance is increased, the bottom surface of the inner wall of the steel pipe will drop as the distance increases, so that the inner wall of the steel pipe will not contact the grinding disc 201. Therefore, when the spacing between the driven rollers 603 is adjusted, the height will also increase, thus solving the above problem; Working Principle: The adjustment mechanism 8 automatically adjusts according to the pipe diameter: the telescopic rod 810 pushes the lifting frame 806 upward, and the adjustment block 802 is driven to move through the composite track of the inclined slot 801 and the transverse slot 807, so that the two driven rollers 603 are synchronously expanded and lifted. This not only ensures stable support for steel pipes of different diameters, but also maintains a constant height at the center of the steel pipe, ensuring that the axis of the grinding disc is always parallel to the central axis of the pipe lumen; then the driving roller 604 presses the steel pipe to rotate, and the resistance mechanism 7 constrains axial displacement. At the same time, the inclined steel pipe uses gravity and centrifugal force to continuously discharge polishing iron chips out of the pipe during rotation. Example 3: The problem with the above solution is that the length of the shaft 202 is fixed, while the length of the steel pipe is not. When the length of the steel pipe is long, the length of the shaft 202 limits the grinding. Figure 7 、 Figure 8An axial polishing mechanism is provided, wherein a through hole 403 is formed transversely on the inner side of a rotating chuck 402, the inner wall of the through hole 403 is slidably connected to the outer wall of the rotating shaft 202, an extension rod 415 is threadedly connected to the end of the rotating shaft 202 away from the grinding disc 201, and a transverse guide groove 404 is formed in an annular array on the inner wall of the through hole 403, and transverse guide blocks 405 are formed in an annular array on the outer wall of the extension rod 415 and the outer wall of the rotating shaft 202, and the outer wall of the transverse guide block 405 is slidably connected to the inner wall of the transverse guide groove 404; An annular groove 406 is formed on the left end of the rotating shaft 202 and the outer side of the left end of the extension rod 415; An L-shaped plate 413 is fixedly connected to the outer side of the mobile frame 301, and a telescopic rod five 414 is fixedly installed on the outer side of the L-shaped plate 413. The output end of the telescopic rod five 414 is fixedly connected to the mobile plate 409, and the bottom end of the mobile plate 409 is fixedly connected to the guide rods 412 on both sides, and the top end of the mobile plate 409 is fixedly connected to the telescopic rod four 410 on both sides. The output end of the telescopic rod four 410 is fixedly connected to the U-shaped card plate 408, and the inner side of the U-shaped card plate 408 is provided with a semicircular groove corresponding to the annular card groove 406. The inner wall of the annular card groove 406 is provided with an annular rolling groove 407. The inner wall of the U-shaped card plate 408 is rollingly connected with a ball 411, and the outer wall of the ball 411 is rollingly connected to the inner wall of the annular rolling groove 407. During use, in the initial state, the U-shaped clamping plate 408 is clamped in the annular clamping groove 406 provided on the rotating shaft 202, and is rotatably connected to the rotating shaft 202 through the inner side of the U-shaped clamping plate 408 via the ball 411; during use, the driving mechanism 3 drives the rotating chuck 402 to rotate, and the rotating chuck 402 transmits torque to the rotating shaft 202 through the transverse guide groove 404, thereby driving the rotating shaft 202 to rotate, and the grinding disc 201 is driven to rotate through the rotating shaft 202; Feeding state; control the telescopic rod five 414 to push the movable plate 409 to move; the movable plate 409 drives the U-shaped card plate 408 and the rotating shaft 202 clamped and rotated inside the U-shaped card plate 408 to move, driving the grinding disc 201 to extend. When the length of the rotating shaft 202 is not enough, the driving assembly 4 stops running, and after splicing the extension rod 415 with the rotating shaft 202, control the telescopic rod four 410 and the telescopic rod five 414, and after separating the U-shaped card plate 408 from the rotating shaft 202, the telescopic rod five 414 drives the movable plate 409 to reset, and then control the telescopic rod four 410 to clamp the U-shaped card plate 408 in the annular groove 406 of the extension rod 415.

[0019] Working principle: When the steel pipe is too long, the extension rod 415 is threadedly spliced to the end of the rotating shaft 202, and its transverse guide block 405 is embedded in the transverse guide groove 404 of the rotating chuck 402 to form a circumferential torque transmission channel; The telescopic rod 410 drives the U-shaped clamping plate 408 to close, and the inner ball 411 rolls and engages with the annular groove 407 of the rotating shaft 202 / extension rod 415, thereby achieving a composite connection with axial sliding and circumferential strong coupling. The telescopic rod 414 pushes the movable plate 409 and the U-shaped clamping plate 408 forward as a whole, driving the rotating shaft 202-extension rod 415 system to slide axially along the transverse guide groove 404, so that the grinding disc 201 penetrates into the inner cavity of the extra-long steel pipe.

Claims

1. An axial polishing mechanism, comprising a bracket (1), a grinding disc (201), a drive assembly (4), a supporting mechanism and a tilting drive mechanism (9), characterized in that: The top surface of the bracket (1) is tilted, and a moving assembly (5) for adjusting the position of the driving assembly (4) is installed between the bottom end of the driving assembly (4) and the top surface of the bracket (1); the driving assembly (4) comprises a rotating chuck (402) and a motor (401) for driving the rotating chuck (402), the rotating chuck (402) is connected to an axially retractable rotating shaft (202), and the end of the rotating shaft (202) is fixedly connected to a grinding disc (201); The support mechanism includes a horizontal plate (601) and a support frame (602) on top thereof, with inclined grooves (801) provided on both sides of the support frame (602), an adjusting block (802) being slidably connected in the inclined groove (801), the adjusting block (802) being rotatably connected to a driven roller (603), the adjusting block (802) being connected to a telescopic rod (810) via a lifting frame (806), and the lifting frame (806) being driven by the telescopic rod (810) to link the adjusting block (802), so that the two driven rollers (603) are synchronously raised in height when the distance between them is increased, thereby ensuring that the inner walls of steel pipes of different diameters always contact the grinding disc (201); The rotating shaft (202) is detachably connected to the extension rod (415), and the rotating chuck (402) is provided with a transverse guide groove (404) that is slidably engaged with the transverse guide block (405) of the rotating shaft (202) / extension rod (415); The driving assembly (4) is provided with a sliding assembly on the side thereof, which drives the rotating shaft (202) to advance axially through rolling locking between the U-shaped clamping plate (408) and the annular clamping groove (406) of the rotating shaft (202) / extension rod (415).

2. An axial polishing mechanism according to claim 1, characterized in that: The adjustment block (802) is composed of a slider 1 (803), a circular connecting sleeve (805) and a slider 2 (804). The slider 1 (803) slides obliquely along the inclined groove (801), and the slider 2 (804) slides horizontally along the transverse groove (807) of the lifting frame (806), forming a forced motion chain for expanding the spacing and raising the height.

3. An axial polishing mechanism according to claim 2, characterized in that: The lifting frame (806) is fixedly connected to the lifting plate (809) via a connecting rod (808), and the two ends of the telescopic rod (810) are respectively fixed to the bottom of the lifting plate (809) and the top of the horizontal plate (601).

4. The axial polishing mechanism according to claim 1, characterized in that: The rotary chuck (402) is provided with a through hole (403), an annular array of transverse guide grooves (404) are provided on the inner wall of the through hole (403), and transverse guide blocks (405) are provided on the outer walls of the rotating shaft (202) and the extension rod (415) accordingly.

5. The axial polishing mechanism according to claim 1, characterized in that: The inner wall of the U-shaped card plate (408) is embedded with a ball (411) that rolls with the annular rolling groove (407) of the rotating shaft (202) / extension rod (415). The U-shaped card plate (408) is connected to the telescopic rod four (410) to control opening and closing.

6. An axial polishing mechanism according to claim 5, characterized in that: The telescopic rod four (410) is fixed to the movable plate (409), an L-shaped plate (413) is provided below the movable plate (409), a telescopic rod five (414) is installed on the side wall of the L-shaped plate (413), and an output end of the telescopic rod five (414) is connected to the movable plate (409).

7. An axial polishing mechanism according to claim 6, characterized in that: The support mechanism includes a driving roller (604), which is pressed against the surface of the steel pipe via a telescopic rod (606) and is connected to a driving motor (608) via a pulley (611) and a belt (612).

8. An axial polishing mechanism according to claim 7, characterized in that: A resisting mechanism (7) is provided on one side of the driving roller (604) to constrain the axial displacement of the steel pipe.

9. The axial polishing mechanism according to claim 1, characterized in that: The moving assembly (5) comprises a support frame (501) fixedly mounted on the top of the bracket (1); a telescopic rod (504) is fixedly mounted on the side wall of the support frame (501); an output end of the telescopic rod (504) is fixedly connected to the bottom end of the moving frame (301); sliding sleeves (503) are fixedly mounted on both sides of the bottom end of the moving frame (301); guide rails (502) are fixedly mounted on both sides of the top end of the support frame (501); an inner wall of the sliding sleeve (503) is slidably connected to an outer wall of the guide rail (502); and the movement of the support frame (501) is guided by the sliding connection between the sliding sleeve (503) and the guide rail (502).

10. A steel pipe inner wall polishing machine with an axial polishing mechanism, characterized in that: Adopt the axial polishing mechanism described in claim 1 to claim 9.

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