High-precision metal pipe fitting inner wall grinding device

Abstract

The invention discloses a high-precision metal pipe fitting inner wall grinding device, and relates to the technical field of metal pipe fitting grinding, the high-precision metal pipe fitting inner wall grinding device comprises a base, an overturning frame is fixedly mounted on the left side of the top surface of the base, a first pipe clamping frame is rotatably connected to the overturning frame, and a pipe clamping ring is rotatably connected to the middle of the first pipe clamping frame; at least three first electric telescopic rods are evenly arranged on the inner side of the pipe clamping ring, the ends, away from the pipe clamping ring, of the first electric telescopic rods are fixedly connected with clamping blocks, the top of the first pipe clamping frame is fixedly connected with a connecting frame, and the side, away from the first pipe clamping frame, of the connecting frame is fixedly connected with a second pipe clamping frame. By means of the structure, in the grinding process, grinding chips are vertically and continuously discharged through the gravity of the grinding chips, in the vertical state, the grinding chips are not convenient to make contact with the metal round pipe for a long time, the situation that the grinding chips are cooled on the inner wall of the metal round pipe and then adhere to the inner wall of the metal round pipe is avoided, and the grinding efficiency is improved. And the polishing machining effect is improved.

Description

Technical Field

[0001] The invention relates to the technical field of metal pipe grinding, in particular to a high-precision metal pipe inner wall grinding device. Background Art

[0002] Metal pipe fittings are common workpieces in the manufacturing industry. Metal pipe fitting processing refers to various mechanical processing and treatments of metal pipe fittings to achieve specific size, shape and performance requirements, including grinding and polishing to reduce the surface roughness of metal pipe fittings and improve appearance and corrosion resistance.

[0003] The existing inner wall grinding device of metal pipes requires the metal pipes to be placed horizontally, and the grinding wheel is gradually fed into the inner wall of the pipes through a feeding mechanism and a straight rod. After the grinding is completed, the grinding chips in the pipe are discharged through a chip extraction system. The grinding chips cannot be cleaned in real time, and during the grinding process, some grinding chips are easily adhered to the inner wall of the pipes after cooling, thereby affecting the grinding effect of the pipes.

[0004] Therefore, a high-precision metal pipe inner wall grinding device is proposed to solve the above problems. Summary of the invention

[0005] 1. Technical issues to be resolved

[0006] In view of the shortcomings of the prior art, the present invention provides a high-precision metal pipe inner wall grinding device, which stands the metal round pipe vertically for grinding. During the grinding process, the grinding chips are continuously discharged vertically by their own gravity to solve the problems raised in the above background technology.

[0007] (II) Technical solution

[0008] To achieve the above object, the present invention provides the following technical solution: a high-precision metal pipe inner wall grinding device, comprising:

[0009] A base, a flip frame is fixedly installed on the left side of the top surface of the base, a first pipe clamping frame is rotatably connected to the flip frame, a pipe clamping ring is rotatably connected to the middle of the first pipe clamping frame, at least three first electric telescopic rods are evenly arranged on the inner side of the pipe clamping ring, a clamping block is fixedly connected to the end of the first electric telescopic rod away from the pipe clamping ring, a connecting frame is fixedly connected to the top of the first pipe clamping frame, a second pipe clamping frame is fixedly connected to the side of the connecting frame away from the first pipe clamping frame, and a three-jaw chuck is rotatably connected to the second pipe clamping frame toward the side of the first pipe clamping frame;

[0010] A tube rotating assembly for self-rotating a metal round tube, wherein the tube rotating assembly is arranged between a tube clamping ring and a three-jaw chuck;

[0011] A riser assembly for erecting a metal round tube vertically, the riser assembly comprising an arc frame, the bottom of the arc frame is fixedly connected to the right side of the top surface of the base, support rods are fixedly connected between the front and rear sides of the top of the arc frame and the base, a plate frame is fixedly connected to the bottom right side of the second pipe clamping frame, a motor three is fixedly installed on the top surface of the plate frame, a worm is fixedly connected to the output end of the motor three, a rotating shaft is rotatably connected in the plate frame, a worm gear is fixedly sleeved in the middle of the rotating shaft, and the worm gear is meshed with the worm, gear two is fixedly sleeved at both ends of the rotating shaft, arc-shaped racks are fixedly arranged on the front and rear sides of the arc frame, and gear two is meshed with the arc-shaped rack;

[0012] A moving component, wherein the moving component is arranged on the second pipe clamping rack, a chip collecting component is arranged on the moving component, a rectangular shell is arranged on the chip collecting component, a motor is fixedly mounted on one side of the rectangular shell, a driving shaft is fixedly connected to the output end of the motor, and the driving shaft is rotatably connected to the rectangular shell, a grinding wheel is fixedly sleeved on the middle part of the driving shaft, and the moving component is used to drive the chip collecting component and the grinding wheel to move in a straight line along the inner wall of the metal round tube.

[0013] Preferably, the rotation axis of the first pipe clamping frame overlaps with the center of the arc-shaped gear rail, the clamping block is arranged in an L-shaped structure, the clamping block and the three-jaw chuck are used to clamp and position the two ends of the metal round tube, when the metal round tube is erected, the clamping block can also support the metal round tube, and the inner diameter of the pipe clamping ring is larger than the diameter of the metal round tube.

[0014] Preferably, it further comprises sandpaper and a partition plate, wherein the sandpaper is fixedly sleeved on the right side of the driving shaft 1, and the partition plate is fixedly installed in the middle of the rectangular shell, and the partition plate is located between the grinding wheel and the sandpaper.

[0015] Preferably, the rotating tube assembly includes motor 2, which is fixedly mounted on one side of the connecting frame, and the output end of the motor 2 is fixedly connected to the driving shaft 2, and the driving shaft 2 is rotatably connected to the connecting frame, and both sides of the driving shaft 2 in the length direction are fixedly sleeved with gear 1, and the outer surfaces of the tube clamping ring and the three-jaw chuck are fixedly sleeved with gear ring 1, and the two gear 1s are respectively meshed with the two gear rings 1.

[0016] Preferably, the moving component includes a motor four, which is fixedly installed in the middle of the second pipe clamping frame, and the output end of the motor four is fixedly connected to a threaded rod, and the front and rear sides of the second pipe clamping frame are fixedly connected to limiting rods, and one end of the limiting rod away from the second pipe clamping frame is fixedly connected to a connecting piece, and the end of the threaded rod away from the motor four is rotatably connected to the middle of the connecting piece.

[0017] Preferably, the chip collection assembly includes a threaded tube, the inner surface of the threaded tube is threadedly connected to the outer surface of the threaded rod, the outer surface of the threaded tube is fixedly sleeved with a chip collection barrel, the top of the chip collection barrel is fixedly connected to the bottom of the rectangular shell, the front and rear sides of the chip collection barrel are fixedly connected with sliding tubes, the sliding tubes are movably inserted into the outer surface of the limit rod, the left side of the chip collection barrel is fixedly connected with a filter screen, the left side of the filter screen is rotatably connected with a gear ring 2, the inner side of the gear ring 2 is fixedly connected with a spiral fan blade, the left side of the drive shaft 1 is fixedly sleeved with a gear 3, the gear ring 2 is meshed with gear 3, and a switch plate is provided at the bottom of the chip collection barrel, and the switch plate is used to remove waste chips from the chip collection barrel.

[0018] Preferably, the right side of the chip collecting barrel is sealed, so that when the spiral fan blades rotate, air can be driven to flow, and the grinding chips are sucked from the rectangular shell into the chip collecting barrel for collection.

[0019] Preferably, a stabilizing component is further included, which includes a positioning groove opened on the left side of the base, when the metal round tube is erected, the connecting piece is just inserted into the middle of the positioning groove, and a second electric telescopic rod and a positioning plate are provided on both sides of the left and right sides of the positioning groove, and the end of the second electric telescopic rod is fixedly connected to the positioning plate, and the positioning plate is adapted to the shape of the connecting piece.

[0020] (III) Beneficial effects

[0021] Compared with the prior art, the present invention provides a high-precision metal pipe inner wall grinding device, which has the following beneficial effects:

[0022] 1. The motor three of the present invention drives the worm to rotate, and the worm drives the worm wheel to rotate, so that the gear two at both ends of the rotating shaft rotate synchronously, and then the gear two engages with the arc-shaped rack to lift one end of the metal round tube until the metal round tube is vertically erected. By utilizing the above structure, during the grinding process, the grinding chips are continuously discharged vertically by their own gravity, and the vertical state is not convenient for the grinding chips to contact with the metal round tube for a long time, so that the grinding chips are prevented from cooling on the inner wall of the metal round tube, thereby sticking to the inner wall of the metal round tube, thereby improving the grinding processing effect.

[0023] 2. The arrangement of the rotating tube assembly and the moving assembly of the present invention enables the entire structure to be polished to be located inside the metal round tube, and the entire structure occupies a small area.

[0024] 3. The present invention drives gear three to rotate synchronously through driving shaft one, and gear three meshes with transmission gear ring two and spiral fan blades to rotate. At this time, the spiral fan blades drive air flow, so that negative pressure suction is generated at the rectangular shell, and the grinding chips from grinding and polishing are further sucked into the chip collecting barrel for collection. After the processing is completed, the grinding chips in the chip collecting barrel can be taken out and processed by opening the switch plate, thereby further reducing the adhesion of the grinding chips to the inner wall of the metal round tube.

[0025] 4. The present invention arranges a stabilizing component. When the second electric telescopic rod drives the positioning plate to clamp the connector, the threaded rod and the limit rod can be positioned away from one end of the second pipe clamping frame, thereby improving the stability of the mechanical movement. The threaded rod and the limit rod move the grinding wheel and sandpaper up and down in a vertical state, thereby avoiding the influence of their own weight on the grinding and polishing accuracy of the grinding wheel and sandpaper. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a three-dimensional diagram of the main structure of the present invention;

[0027] Figure 2 This is another structural diagram of the present invention;

[0028] Figure 3 This is a structural diagram of the pipe clamp ring, the first electric telescopic rod and the clamp block of the present invention;

[0029] Figure 4 This is a structural diagram related to the rotating tube assembly of the present invention;

[0030] Figure 5 It is a structural diagram related to the riser assembly of the present invention;

[0031] Figure 6 It is a structural diagram related to the mobile component of the present invention;

[0032] Figure 7 This is a structural diagram related to the chip collecting assembly of the present invention;

[0033] Figure 8 This is a structural diagram related to the stabilizing component of the present invention.

[0034] Reference numerals:

[0035] 1. Base; 101. Turning frame; 102. First pipe clamping frame; 103. Pipe clamping ring; 104. First electric telescopic rod; 105. Clamping block; 106. Connecting frame; 107. Second pipe clamping frame; 108. Three-jaw chuck; 109. Rectangular shell; 110. Motor 1; 111. Driving shaft 1; 112. Grinding wheel; 113. Sandpaper; 114. Separator; 2. Metal round tube;

[0036] 3. Rotating tube assembly; 301. Motor 2; 302. Driving shaft 2; 303. Gear 1; 304. Gear ring 1;

[0037] 4. Standpipe assembly; 401. Arc frame; 402. Support rod; 403. Plate frame; 404. Motor 3; 405. Worm; 406. Rotating shaft; 407. Worm wheel; 408. Gear 2; 409. Arc rack;

[0038] 5. Moving assembly; 501. Motor 4; 502. Threaded rod; 503. Limit rod; 504. Connecting piece;

[0039] 6. Chip collecting assembly; 601. Threaded pipe; 602. Chip collecting cylinder; 603. Sliding pipe; 604. Filter screen; 605. Gear ring 2; 606. Spiral fan blade; 607. Gear 3; 608. Switch plate;

[0040] 7. Stabilizing assembly; 701. Positioning slot; 702. Second electric telescopic rod; 703. Positioning plate. DETAILED DESCRIPTION

[0041] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. 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.

[0042] The present invention is further described in detail below based on the accompanying drawings and embodiments.

[0043] Example 1, please refer to Figures 1 to 8 As shown:

[0044] In order to solve the problems mentioned in the technical solution, the embodiment of the present application provides a high-precision metal pipe inner wall grinding device, comprising:

[0045] A base 1, a flip frame 101 is fixedly installed on the left side of the top surface of the base 1, a first pipe clamping frame 102 is rotatably connected to the flip frame 101, a pipe clamping ring 103 is rotatably connected to the middle of the first pipe clamping frame 102, at least three first electric telescopic rods 104 are evenly arranged on the inner side of the pipe clamping ring 103, a clamping block 105 is fixedly connected to one end of the first electric telescopic rod 104 away from the pipe clamping ring 103, a connecting frame 106 is fixedly connected to the top of the first pipe clamping frame 102, a second pipe clamping frame 107 is fixedly connected to the side of the connecting frame 106 away from the first pipe clamping frame 102, and a three-jaw chuck 108 is rotatably connected to the second pipe clamping frame 107 toward the side of the first pipe clamping frame 102;

[0046] The arrangement of the tube clamp ring 103, the first electric telescopic rod 104 and the clamp block 105 facilitates the installation and fixing of the metal round tube 2;

[0047] A rotating tube assembly 3 for rotating the metal round tube 2, the rotating tube assembly 3 being arranged between the tube clamping ring 103 and the three-jaw chuck 108;

[0048] A riser assembly 4 for vertically erecting a metal round tube 2, the riser assembly 4 comprises an arc frame 401, the bottom of the arc frame 401 is fixedly connected to the right side of the top surface of the base 1, a support rod 402 is fixedly connected between the front and rear sides of the top of the arc frame 401 and the base 1, a plate frame 403 is fixedly connected to the bottom of the right side of the second pipe clamping frame 107, a motor 3 404 is fixedly installed on the top surface of the plate frame 403, a worm 405 is fixedly connected to the output end of the motor 3 404, a rotating shaft 406 is rotatably connected in the plate frame 403, a worm gear 407 is fixedly sleeved in the middle of the rotating shaft 406, and the worm gear 407 is meshed with the worm 405, and a gear 2 408 is fixedly sleeved at both ends of the rotating shaft 406, and an arc rack 409 is fixedly provided on the front and rear sides of the arc frame 401, and the gear 2 408 is meshed with the arc rack 409;

[0049] Specifically, by driving the worm 405 to mesh with the worm wheel 407 to rotate, the gear 2 408 is meshed and rotated along the arc-shaped rack 409, and one end of the metal tube 2 is rotated and raised, so that the waste chips generated by the grinding wheel 112 can fall vertically, and the waste chips are prevented from cooling on the inner wall of the metal tube 2 and sticking to the inner wall;

[0050] A moving assembly 5, the moving assembly 5 is arranged on the second pipe clamping frame 107, a chip collecting assembly 6 is arranged on the moving assembly 5, a rectangular shell 109 is arranged on the chip collecting assembly 6, a motor 110 is fixedly installed on one side of the rectangular shell 109, a driving shaft 111 is fixedly connected to the output end of the motor 110, and the driving shaft 111 is rotatably connected to the rectangular shell 109, a grinding wheel 112 is fixedly sleeved in the middle of the driving shaft 111, and the moving assembly 5 is used to drive the chip collecting assembly 6 and the grinding wheel 112 to move linearly along the inner wall of the metal round tube 2;

[0051] The top surface of the rectangular shell 109 is adapted to the shape of the inner wall of the metal tube 2, thereby reducing the diffusion of grinding chips from the rectangular shell 109 to the outside and contacting the inner wall of the metal tube 2, and to a certain extent, reducing the adhesion of grinding chips to the inner wall of the metal tube 2.

[0052] Preferably, the rotation axis of the first tube clamping frame 102 overlaps with the center of the arc-shaped gear rail 409, and the clamping block 105 is arranged in an L-shaped structure. The clamping block 105 and the three-jaw chuck 108 are used to clamp and position the two ends of the metal round tube 2. When the metal round tube 2 is erected, the clamping block 105 can also support the metal round tube 2. The inner diameter of the tube clamping ring 103 is larger than the diameter of the metal round tube 2.

[0053] Preferably, it further comprises sandpaper 113 and a partition plate 114, wherein the sandpaper 113 is fixedly sleeved on the right side of the driving shaft 111, and the partition plate 114 is fixedly installed in the middle of the rectangular shell 109, and the partition plate 114 is located between the grinding wheel 112 and the sandpaper 113;

[0054] The inner wall of the metal round tube 2 can be ground and polished simultaneously by the grinding wheel 112 and the sandpaper 113 , and the partition plate 114 can prevent the heated grinding chips from splashing onto the sandpaper 113 , thereby avoiding damage to the sandpaper 113 .

[0055] Preferably, the rotating tube assembly 3 includes a second motor 301, which is fixedly mounted on one side of the connecting frame 106, and the output end of the second motor 301 is fixedly connected to a second drive shaft 302, and the second drive shaft 302 is rotatably connected to the connecting frame 106, and both sides of the second drive shaft 302 in the length direction are fixedly sleeved with a gear 1 303, and the outer surfaces of the clamping ring 103 and the three-jaw chuck 108 are fixedly sleeved with a gear ring 1 304, and the two gears 1 303 are respectively meshed with the two gear rings 1 304;

[0056] By driving the gear 1 303 to rotate, the pipe clamping ring 103 and the three-jaw chuck 108 can be driven to rotate synchronously through the meshing gear ring 1 304, so that the grinding wheel 112 grinds the inner wall of the metal round tube 2 in the circumferential direction.

[0057] Preferably, the moving component 5 includes a motor 501, which is fixedly installed in the middle of the second pipe clamping frame 107. The output end of the motor 501 is fixedly connected to a threaded rod 502. The front and rear sides of the second pipe clamping frame 107 are fixedly connected to a limiting rod 503. The end of the limiting rod 503 away from the second pipe clamping frame 107 is fixedly connected to a connecting piece 504. The end of the threaded rod 502 away from the motor 501 is rotatably connected to the middle of the connecting piece 504.

[0058] As a preferred embodiment, a stabilizing component 7 is further included, and the stabilizing component 7 includes a positioning groove 701 opened on the left side of the base 1. When the metal round tube 2 is erected, the connecting piece 504 is just inserted into the middle of the positioning groove 701. The left and right sides of the positioning groove 701 are both provided with a second electric telescopic rod 702 and a positioning plate 703. The end of the second electric telescopic rod 702 is fixedly connected to the positioning plate 703, and the positioning plate 703 is adapted to the shape of the connecting piece 504.

[0059] Specifically, when the second electric telescopic rod 702 drives the positioning plate 703 to clamp the connecting piece 504, the threaded rod 502 and the limiting rod 503 can be positioned away from one end of the second pipe clamping frame 107, thereby improving their stability during mechanical movement. The threaded rod 502 and the limiting rod 503 move the grinding wheel 112 and the sandpaper 113 up and down in a vertical state, thereby avoiding the influence of their own weight on the grinding and polishing accuracy of the grinding wheel 112 and the sandpaper 113.

[0060] For further example 2, please refer to Figure 7 As shown:

[0061] The chip collecting assembly 6 includes a threaded tube 601, the inner surface of which is threadedly connected to the outer surface of the threaded rod 502, the outer surface of which is fixedly sleeved with a chip collecting barrel 602, the top of which is fixedly connected to the bottom of the rectangular shell 109, the front and rear sides of which are fixedly connected with a slide tube 603, the slide tube 603 is movably plugged into the outer surface of the limit rod 503, the left side of the chip collecting barrel 602 is fixedly connected with a filter screen 604, the left side of the filter screen 604 is rotatably connected with a gear ring 2 605, the inner side of the gear ring 2 605 is fixedly connected with a spiral fan blade 606, the left side of the driving shaft 1 111 is fixedly sleeved with a gear 3 607, the gear ring 2 605 is meshed with the gear 3 607, and a switch plate 608 is provided at the bottom of the chip collecting barrel 602, the switch plate 608 is used to take out the waste chips in the chip collecting barrel 602;

[0062] Specifically, the container structure formed by the threaded tube 601 , the chip collecting cylinder 602 and the filter screen 604 can collect most of the grinding chips and prevent them from contacting the inner wall of the metal round tube 2 .

[0063] Preferably, the right side of the chip collecting barrel 602 is sealed, so that when the spiral fan blades 606 rotate, air can be driven to flow, and the grinding chips are sucked from the rectangular shell 109 into the chip collecting barrel 602 for collection.

[0064] Everything in the above example works like this:

[0065] When in use, the metal round tube 2 is first inserted horizontally through the tube clamping ring 103, then one end of the metal round tube 2 is clamped by the three-jaw chuck 108, and the other end is extended by the first electric telescopic rod 104 and clamped by the clamping block 105, then the motor three 404 drives the worm 405 to rotate, and the worm 405 drives the worm wheel 407 to rotate, so that the gear two 408 at both ends of the rotating shaft 406 rotate synchronously, and then the gear two 408 engages with the arc gear rail 409 to lift one end of the metal round tube 2 until the metal round tube 2 stands upright, then the motor one 110 drives the grinding wheel 112 and the sandpaper 113 to rotate, and the motor two 301 drives the driving shaft two 302 to rotate, so that the gear one 303 engages with the transmission gear ring one 304, and the metal round tube 2 rotates, and the motor four 501 drives the threaded rod 502 to rotate, so that the grinding wheel 112 and the sandpaper 113 are evenly ground and polished along the inner wall of the metal round tube 2;

[0066] During grinding and polishing, the driving shaft 111 synchronously drives the gear three 607 to rotate, and the gear three 607 engages the transmission gear ring 2 605 and the spiral fan blades 606 to rotate. At this time, the spiral fan blades 606 drive the air flow, so that negative pressure suction is generated at the rectangular shell 109, and the grinding chips from grinding and polishing are further sucked into the chip collecting barrel 602 for collection. After the processing is completed, the grinding chips in the chip collecting barrel 602 can be taken out and processed by opening the switch plate 608.

[0067] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0068] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high-precision metal pipe inner wall grinding device, characterized in that: include A base (1), a flip frame (101) is fixedly installed on the left side of the top surface of the base (1), a first pipe clamping frame (102) is rotatably connected to the flip frame (101), a pipe clamping ring (103) is rotatably connected to the middle of the first pipe clamping frame (102), at least three first electric telescopic rods (104) are evenly arranged on the inner side of the pipe clamping ring (103), a clamping block (105) is fixedly connected to one end of the first electric telescopic rod (104) away from the pipe clamping ring (103), a connecting frame (106) is fixedly connected to the top of the first pipe clamping frame (102), a second pipe clamping frame (107) is fixedly connected to the side of the connecting frame (106) away from the first pipe clamping frame (102), and a three-jaw chuck (108) is rotatably connected to the side of the second pipe clamping frame (107) facing the first pipe clamping frame (102); A rotating tube assembly (3) for causing a metal round tube (2) to rotate, wherein the rotating tube assembly (3) is arranged between a tube clamping ring (103) and a three-jaw chuck (108); A stand pipe assembly (4) for vertically erecting a metal round pipe (2), the stand pipe assembly (4) comprising an arc frame (401), the bottom of the arc frame (401) being fixedly connected to the right side of the top surface of a base (1), support rods (402) being fixedly connected between the front and rear sides of the top of the arc frame (401) and the base (1), a plate frame (403) being fixedly connected to the bottom of the right side of the second pipe clamping frame (107), a motor three (404) being fixedly mounted on the top surface of the plate frame (403), and the motor three ( The output end of the plate frame (404) is fixedly connected with a worm (405), the plate frame (403) is rotatably connected with a rotating shaft (406), the middle part of the rotating shaft (406) is fixedly sleeved with a worm wheel (407), and the worm wheel (407) is meshed with the worm (405), both ends of the rotating shaft (406) are fixedly sleeved with a second gear (408), and the front and rear sides of the arc frame (401) are fixedly provided with arc-shaped gear rails (409), and the second gear (408) is meshed with the arc-shaped gear rail (409); A moving assembly (5), wherein the moving assembly (5) is arranged on a second pipe clamping frame (107), a chip collecting assembly (6) is arranged on the moving assembly (5), a rectangular shell (109) is arranged on the chip collecting assembly (6), a motor (110) is fixedly mounted on one side of the rectangular shell (109), an output end of the motor (110) is fixedly connected to a drive shaft (111), and the drive shaft (111) is rotatably connected to the rectangular shell (109), a grinding wheel (112) is fixedly sleeved in the middle of the drive shaft (111), and the moving assembly (5) is used to drive the chip collecting assembly (6) and the grinding wheel (112) to move linearly along the inner wall of the metal round tube (2).

2. The high-precision metal pipe inner wall grinding device according to claim 1, characterized in that: The rotation axis of the first pipe clamping frame (102) overlaps with the center of the arc-shaped gear rail (409); the clamping block (105) is arranged in an L-shaped structure; the clamping block (105) and the three-jaw chuck (108) are used to clamp and position the two ends of the metal round tube (2); when the metal round tube (2) is erected, the clamping block (105) can also support the metal round tube (2); the inner diameter of the pipe clamping ring (103) is larger than the diameter of the metal round tube (2).

3. The high-precision metal pipe inner wall grinding device according to claim 1, characterized in that: It also includes sandpaper (113) and a partition plate (114), wherein the sandpaper (113) is fixedly sleeved on the right side of the driving shaft (111), and the partition plate (114) is fixedly installed in the middle of the rectangular shell (109), and the partition plate (114) is located between the grinding wheel (112) and the sandpaper (113).

4. The high-precision metal pipe inner wall grinding device according to claim 1, characterized in that: The rotating tube assembly (3) comprises a second motor (301), the second motor (301) being fixedly mounted on one side of a connecting frame (106), the output end of the second motor (301) being fixedly connected to a second drive shaft (302), and the second drive shaft (302) being rotatably connected to the connecting frame (106), both sides of the second drive shaft (302) in the length direction being fixedly sleeved with a first gear (303), the outer surfaces of the clamping ring (103) and the three-jaw chuck (108) being fixedly sleeved with a first gear ring (304), and the two first gears (303) being respectively meshed with the two first gear rings (304).

5. The high-precision metal pipe inner wall grinding device according to claim 1, characterized in that: The moving assembly (5) comprises a motor four (501), the motor four (501) is fixedly mounted in the middle of the second pipe clamping frame (107), the output end of the motor four (501) is fixedly connected to a threaded rod (502), the front and rear sides of the second pipe clamping frame (107) are fixedly connected to limit rods (503), one end of the limit rod (503) away from the second pipe clamping frame (107) is fixedly connected to a connecting piece (504), and one end of the threaded rod (502) away from the motor four (501) is rotatably connected to the middle of the connecting piece (504).

6. The high-precision metal pipe inner wall grinding device according to claim 5, characterized in that: The chip collecting assembly (6) comprises a threaded tube (601), the inner surface of the threaded tube (601) is threadedly connected to the outer surface of the threaded rod (502), the outer surface of the threaded tube (601) is fixedly sleeved with a chip collecting barrel (602), the top of the chip collecting barrel (602) is fixedly connected to the bottom of the rectangular shell (109), the front and rear sides of the chip collecting barrel (602) are fixedly connected with sliding tubes (603), the sliding tubes (603) are movably plugged into the outer surface of the limiting rod (503), and the chip collecting barrel (60 2) is fixedly connected to the left side with a filter screen (604), the left side of the filter screen (604) is rotatably connected to a gear ring 2 (605), the inner side of the gear ring 2 (605) is fixedly connected to a spiral fan blade (606), the left side of the drive shaft 1 (111) is fixedly sleeved with a gear 3 (607), the gear ring 2 (605) is meshed with the gear 3 (607), and a switch plate (608) is provided at the bottom of the chip collecting barrel (602), and the switch plate (608) is used to remove waste chips in the chip collecting barrel (602).

7. The high-precision metal pipe inner wall grinding device according to claim 6, characterized in that: The right side of the chip collecting cylinder (602) is sealed, so that when the spiral blade (606) rotates, it can drive air flow and suck the grinding chips from the rectangular shell (109) into the chip collecting cylinder (602) for collection.

8. The high-precision metal pipe inner wall grinding device according to claim 5, characterized in that: The invention also comprises a stabilizing component (7), wherein the stabilizing component (7) comprises a positioning groove (701) provided on the left side of the base (1); when the metal round tube (2) is erected, the connecting piece (504) is just inserted into the middle of the positioning groove (701); a second electric telescopic rod (702) and a positioning plate (703) are provided on both the left and right sides of the positioning groove (701); an end of the second electric telescopic rod (702) is fixedly connected to the positioning plate (703); and the positioning plate (703) is adapted to the shape of the connecting piece (504).

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