Grinding device for inner wall of metal pipe
By designing a metal tube inner wall grinding device that includes a grinding adjustment mechanism and a grinding assembly, the problem of low right-angle processing efficiency of square tube inner wall in the prior art is solved, automatic grinding is realized, manual operation strength is reduced, and it is suitable for square tubes of different specifications.
Patent Information
- Application Number
- CN202510545885.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-28
- Publication Date
- 2025-06-06
AI Technical Summary
The prior art is inefficient in handling right angles of the inner wall of a square tube, and relies on manual operation, and lacks efficiency and flexibility.
A metal pipe inner wall grinding device is designed, including a workbench, a grinding adjustment mechanism, a grinding mechanism and a square pipe clamping mechanism. The grinding mechanism uses the power rod and grinding assembly driven by the third motor, combined with the telescopic kit and cylinder system, to realize automatic grinding of the inner wall of the square tube, especially efficient treatment of the right angle of the inner wall.
The device can automatically polish the inner wall of the square tube, reduce manual operation strength and improve efficiency, especially when processing the inner wall right angle, it is more flexible and efficient, and is suitable for square tubes of different specifications.
Smart Images
Figure CN120095648A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the field of parts grinding, in particular to a metal pipe inner wall grinding device. Background Art
[0002] Square tubes (usually made of steel or aluminum) are widely used in the construction field due to their high structural strength, convenient construction and flexible design. For example, they are used in columns and beams in factories, warehouses and commercial buildings, as well as enclosure structures such as railings and stairs.
[0003] Square tubes are key components of building frames and supporting structures. Their surface quality directly affects welding strength, coating adhesion and overall durability, threatening structural safety. Grinding can remove the oxide layer produced by rolling or cutting, correct dimensional deviations, and provide uniform surface roughness for subsequent painting or anti-corrosion treatment (such as hot-dip galvanizing).
[0004] Existing technologies mostly rely on workers to use tools such as angle grinders and sandpaper, which are highly flexible but inefficient. Belt grinders and shot blasting machines are suitable for mass production, but are insufficient for processing special-shaped parts (such as internal right angles). Summary of the invention
[0005] In view of the above problems, the present invention provides a metal tube inner wall grinding device, which can reduce the intensity of manual grinding, free up manpower, and automatically grind the square tube. The grinding mechanism in the device solves the problem of insufficient right-angle processing of the inner wall of the square tube through the setting of the grinding component.
[0006] The technical scheme used in the present invention is: comprising: a workbench, a grinding adjustment mechanism, a grinding mechanism, and a square tube clamping mechanism. The workbench is provided with a grinding adjustment mechanism and a square tube clamping mechanism, and the grinding mechanism is installed on a support block provided with the grinding adjustment mechanism; the grinding mechanism comprises a third motor, a power rod, a hollow cylinder and a grinding assembly, the third motor is fixedly installed inside the support block, the motor shaft of the third motor is fixedly connected to one end of the power rod, the power rod is rotatably installed inside the hollow cylinder, and one end of the hollow cylinder is fixedly connected to the support block; The grinding assembly comprises a grinding head, a connecting block, a third cylinder and a telescopic kit; the grinding head is fixedly connected to the power rod, the outer side of the grinding head is a frosted surface, the third cylinder is fixedly installed on the center of the square groove of the grinding head, the piston rod of the third cylinder is fixedly connected to the connecting block, there are four telescopic kits, which are respectively located on the four sides of the connecting block, and the telescopic kit comprises an outer cylinder, an edge and corner grinding block, a first cylinder, an inner cylinder, a hollow screw, a center screw, a center cylinder and a rotating rod; the first cylinder is fixedly installed inside the side of the connecting block, the piston rod of the first cylinder is fixedly connected to the rotating rod, the inner cylinder is fixedly installed on the side of the connecting block, the hollow screw is slidably connected to the rotating rod through the sliding groove inside the hollow screw, the outer thread of the hollow screw matches the thread of the upper half of the inner cylinder, the inner thread of the upper half of the hollow screw matches the thread of the center screw, the upper end of the center cylinder is rotatably connected to the hollow screw, the center screw is fixedly installed inside the outer cylinder, the outer cylinder is slidably connected to the center cylinder through the internal sliding groove, and the edge and corner grinding block is fixedly installed on the top of the outer cylinder.
[0007] Preferably, the outer side surface of the edge and corner grinding block is a frosted surface.
[0008] Preferably, the grinding adjustment mechanism includes a screw assembly, a first motor, a displacement plate, a second motor, a rotating frame, an adjustment block, a second telescopic rod and a support block; There are two screw groups, both of which are rotatably installed on the workbench, a transmission wheel is provided at one end of the screw group, and the transmission wheels on the two screw groups are connected by a transmission belt. The first motor is fixedly installed on the workbench, and the motor shaft of the first motor is fixedly connected to one end of one of the screw groups. The displacement plate is threadedly matched with the two screw groups through threaded holes. The second motor is fixedly installed on the displacement plate, and the motor shaft of the second motor is fixedly connected to the rotating frame. The adjusting block is slidably installed on the positioning column of the rotating frame through a circular hole, the upper end of the second telescopic rod is fixedly connected to the support block, and the lower end of the second telescopic rod is fixedly connected to the adjusting block.
[0009] Preferably, the grinding adjustment mechanism further comprises a first telescopic rod, which is fixedly mounted on a side of the adjustment block, and a plurality of positioning holes are provided on the rotating frame.
[0010] Preferably, the grinding adjustment mechanism also includes a positioning slider and a positioning cylinder; the positioning slider is slidably installed in the slide groove of the middle long rod on the lower end surface of the support block, the outer side of the positioning slider is provided with an inclined surface, the inner side of the positioning slider is provided with a spring, and the positioning cylinder is fixedly installed in the middle position of the upper end surface of the adjustment block.
[0011] Preferably, an oblique locking groove is provided inside the locking tube.
[0012] Preferably, the square tube clamping mechanism comprises a vertical clamping plate group, a horizontal clamping plate group, a rack and pinion group, a second cylinder and a fourth motor; There are two vertical splint groups, both of which are slidably installed in the slide grooves of the workbench, and the horizontal splint groups are slidably installed in the slide grooves on the two vertical splint groups respectively, and one horizontal splint group is located at the upper half of the slide groove of the right vertical splint group, and the other horizontal splint group is located at the lower half of the slide groove of the left vertical splint group. A second cylinder is provided below the left horizontal splint group, and a second cylinder is provided above the right horizontal splint group; the rack and gear group includes two racks and a cylindrical gear, one end of one rack is fixedly connected to the vertical splint group on the left, and the other end is slidably connected to the vertical splint group on the right, one end of the other rack is fixedly connected to the vertical splint group on the right, and the other end is slidably connected to the vertical splint group on the left, the cylindrical gear meshes with the two racks, and the fourth motor is fixedly installed on the workbench, and the motor shaft of the fourth motor is fixedly connected to the cylindrical gear in the first cylinder.
[0013] Beneficial effects of the present invention: 1. The present invention can reduce the intensity of manual grinding through the device, liberate manpower, and automatically grind the square tube.
[0014] 2. The present invention solves the problem of insufficient right-angle processing of the inner wall of the square tube through the grinding mechanism in the device.
[0015] 3. The present invention increases the stroke by using a telescopic setting of the grinding component, which can adapt to square tubes of different specifications and expand the application range of the device. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention.
[0017] Figure 2 This is a schematic diagram of the grinding adjustment mechanism of the present invention from a first angle.
[0018] Figure 3 for Figure 2 Enlarged schematic diagram of part A.
[0019] Figure 4 This is a second angle schematic diagram of the grinding adjustment mechanism of the present invention.
[0020] Figure 5 for Figure 4 Schematic diagram of the enlarged portion B.
[0021] Figure 6 It is a structural schematic diagram of a part of the grinding mechanism of the present invention.
[0022] Figure 7 It is a structural schematic diagram of the grinding mechanism of the present invention.
[0023] Figure 8 It is a schematic diagram of the internal structure of the grinding mechanism of the present invention.
[0024] Fig. 9 It is a schematic diagram of the square tube clamping mechanism of the present invention from a first angle.
[0025] Fig.10 It is a second angle schematic diagram of the square tube clamping mechanism of the present invention.
[0026] Figure numbers: 1-workbench; 2-screw group; 3-first motor; 4-displacement plate; 5-second motor; 6-rotating frame; 7-adjusting block; 8-first telescopic rod; 9-second telescopic rod; 10-supporting block; 11-third motor; 12-power rod; 13-hollow cylinder; 14-positioning slider; 15-positioning cylinder; 16-grinding head; 17-connecting block; 18-outer cylinder; 19-edge and corner grinding block; 20-first cylinder; 21-inner cylinder; 22-hollow screw; 23-center screw; 24-center cylinder; 25-rotating rod; 26-vertical splint group; 27-horizontal splint group; 28-rack and pinion group; 29-second cylinder; 30-third cylinder; 31-fourth motor. DETAILED DESCRIPTION
[0027] The technical solution of the present invention is further specifically described below by way of embodiments and in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific implementation disclosed below.
[0028] In the description of the present invention, it should be noted that the terms "upper", "lower", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the invention product is usually placed when in use. They are only simplified descriptions for the convenience of describing the present invention patent, and do not indicate or imply that the equipment or components referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the present invention patent. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood through specific circumstances.
[0029] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present invention are given in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thoroughly understood.
[0030] Implementation example Figure 1-Figure 10As shown, a metal pipe inner wall grinding device comprises: a workbench 1, a grinding adjustment mechanism, a grinding mechanism, and a square pipe clamping mechanism. The workbench 1 is provided with a grinding adjustment mechanism and a square pipe clamping mechanism, and the grinding mechanism is installed on a support block 10 provided with the grinding adjustment mechanism; the grinding mechanism comprises a third motor 11, a power rod 12, a hollow cylinder 13 and a grinding assembly, the third motor 11 is fixedly installed inside the support block 10, the motor shaft of the third motor 11 is fixedly connected to one end of the power rod 12, the power rod 12 is rotatably installed inside the hollow cylinder 13, and one end of the hollow cylinder 13 is fixedly connected to the support block 10; The grinding assembly includes a grinding head 16, a connecting block 17, a third cylinder 30 and a telescopic kit; the grinding head 16 is fixedly connected to the power rod 12, the outer side of the grinding head 16 is a frosted surface, the third cylinder 30 is fixedly installed in the center of the square groove of the grinding head 16, the piston rod of the third cylinder 30 is fixedly connected to the connecting block 17, there are four telescopic kits, which are respectively located on the four sides of the connecting block 17, and the telescopic kit includes an outer cylinder 18, an edge grinding block 19, a first cylinder 20, an inner cylinder 21, a hollow screw 22, a center screw 23, a center cylinder 24 and a rotating rod 25; the first cylinder 20, an inner cylinder 21, a hollow screw 22, a center screw 23, a center cylinder 24 and a rotating rod 25; The cylinder 20 is fixedly mounted inside the side of the connecting block 17, the piston rod of the first cylinder 20 is fixedly connected to the rotating rod 25, the inner cylinder 21 is fixedly mounted on the side of the connecting block 17, the hollow screw rod 22 is slidably connected to the rotating rod 25 through the slide groove inside the hollow screw rod 22, the external thread of the hollow screw rod 22 is matched with the thread of the upper half of the inner cylinder 21, the internal thread of the upper half of the hollow screw rod 22 is matched with the thread of the center screw 23, the upper end of the center cylinder 24 is rotatably connected to the hollow screw rod 22, the center screw 23 is fixedly mounted inside the outer cylinder 18, and the outer cylinder 1 8 is slidably connected with the center tube 24 through the internal slide groove, and the corner grinding block 19 is fixedly installed on the top of the outer tube 18; when it is necessary to grind the corners of the square tube, the third cylinder 30 is extended to drive the connecting block 17 to move outside the square groove of the grinding head 16, and then the first cylinder 20 is started to drive the rotating rod 25 to rotate. Due to the limitation of the hollow screw rod 22 by the internal slide groove of the hollow screw rod 22, the rotating rod 25 drives the hollow screw rod 22 to rotate. Due to the limitation of the hollow screw rod 22 by the thread of the upper part of the inner tube 21, the hollow screw rod 22 begins to move to the outside of the inner tube 21. The hollow screw 22 drives the center tube 24 to move outward. Since the thread of the center screw 23 does not rotate, the internal thread of the upper part of the hollow screw 22 cooperates with the thread of the center screw 23. Therefore, the rotation of the hollow screw 22 will drive the center screw 23 to move relative to the outside of the hollow screw 22. The center screw 23 drives the outer tube 18 to move toward the outside of the hollow screw 22, thereby completing the extension and retraction of the telescopic kit, and pushing the four corner grinding blocks 19 onto the four corners of the inner wall of the square tube, and using the corner grinding blocks 19 to grind the four corners of the inner wall of the square tube.
[0031] In an optional embodiment of the present invention, the outer side surface of the edge grinding block 19 is a frosted surface.
[0032] In an optional embodiment of the present invention, Figure 1-Figure 5 As shown, the grinding adjustment mechanism includes a screw assembly 2, a first motor 3, a displacement plate 4, a second motor 5, a rotating frame 6, an adjustment block 7, a second telescopic rod 9 and a support block 10; The two screw groups 2 are both rotatably mounted on the workbench 1. A transmission wheel is provided at one end of the screw group 2. The transmission wheels on the two screw groups 2 are connected by a transmission belt. The first motor 3 is fixedly mounted on the workbench 1. The motor shaft of the first motor 3 is fixedly connected to one end of one of the screw groups 2. The displacement plate 4 is threadedly matched with the two screw groups 2 through threaded holes. The second motor 5 is fixedly mounted on the displacement plate 4. The motor shaft of the second motor 5 is fixedly connected to the rotating frame 6. The adjustment block 7 is slidably mounted on the positioning column of the rotating frame 6 through a circular hole. The upper end of the second telescopic rod 9 is fixed to the support block 10. The lower end of the second telescopic rod 9 is fixedly connected to the adjusting block 7; when it is necessary to grind the inner wall of the square tube, the first motor 3 is started, driving the screw group 2 to rotate, the screw group 2 drives the displacement plate 4 to move, the displacement plate 4 drives the grinding mechanism installed on the support block 10 to move to the inside of the square tube, the second motor 5 works to drive the rotating frame 6 to rotate, the rotating frame 6 drives the adjusting block 7, the second telescopic rod 9 and the support block 10 to rotate around the motor shaft of the second motor 5, due to the limiting of the square tube and the extension of the second telescopic rod 9, the grinding mechanism is driven to make a square trajectory on the inner wall of the square tube to grind the inner wall of the square tube.
[0033] In an optional embodiment of the present invention, Figure 3 As shown, the grinding adjustment mechanism also includes a first telescopic rod 8, which is fixedly mounted on the side of the adjustment block 7. The rotating frame 6 is provided with several positioning holes. Before grinding, the first telescopic rod 8 is manually pressed to disengage the first telescopic rod 8 from the positioning holes on the rotating frame 6, and then the position of the adjustment block 7 is moved up and down according to the specifications of the square tube. When it moves to a suitable position, the first telescopic rod 8 is released to extend the first telescopic rod 8 into other positioning holes.
[0034] In an optional embodiment of the present invention, Figure 5As shown, the grinding adjustment mechanism also includes a positioning slider 14 and a positioning tube 15; the positioning slider 14 is slidably installed in the slide groove of the middle long rod on the lower end surface of the support block 10, the outer side of the positioning slider 14 is provided with an inclined surface, the inner inner side of the positioning slider 14 is provided with a spring, and the positioning tube 15 is fixedly installed in the middle position of the upper end surface of the adjusting block 7. When it is necessary to grind the corners of the square tube, in order to prevent the second telescopic rod 9 from moving during grinding, the support block 10 is manually pressed to press the positioning slider 14 downward, and the positioning tube 15 limits the inclined surface of the positioning slider 14, the spring on the positioning slider 14 is compressed, and the positioning slider 14 enters the positioning tube 15. When encountering the positioning groove in the positioning tube 15, the spring is restored, and the positioning slider 14 is clamped into the positioning grooves on both sides of the positioning tube 15 to lock the second telescopic rod 9, and then the position of the adjusting block 7 is adjusted to make the grinding mechanism coaxial with the second motor 5.
[0035] In an optional embodiment of the present invention, an oblique locking groove is provided inside the locking tube 15 .
[0036] In an optional embodiment of the present invention, the square tube clamping mechanism includes a vertical clamping plate group 26, a horizontal clamping plate group 27, a rack and pinion group 28, a second cylinder 29 and a fourth motor 31; There are two vertical clamping plate groups 26, both of which are slidably installed in the slide grooves of the workbench 1, and the horizontal clamping plate groups 27 are slidably installed in the slide grooves on the two vertical clamping plate groups 26, respectively. One horizontal clamping plate group 27 is located in the upper half of the slide groove of the right vertical clamping plate group 26, and the other horizontal clamping plate group 27 is located in the lower half of the slide groove of the left vertical clamping plate group 26. A second cylinder 29 is provided below the left horizontal clamping plate group 27, and a second cylinder 29 is provided above the right horizontal clamping plate group 27; the rack and gear group 28 includes two racks and a cylindrical gear, one end of which is fixedly connected to the vertical clamping plate group 26 on the left, and the other end is fixedly connected to the vertical clamping plate group 26 on the right. The plate group 26 is slidably connected, one end of the other rack is fixedly connected to the vertical clamping plate group 26 on the right, and the other end is slidably connected to the vertical clamping plate group 26 on the left, the cylindrical gear is meshed with the two racks, the fourth motor 31 is fixedly installed on the workbench 1, and the motor shaft of the fourth motor 31 is fixedly connected to the cylindrical gear in the first cylinder 20; the square tube is placed between the two vertical clamping plate groups 26, and the fourth motor 31 works to drive the gear in the rack gear group 28 to rotate, thereby driving the rack to rotate, so that the two vertical clamping plate groups 26 move toward the middle, and then the second cylinder 29 works to move the two horizontal clamping plate groups 27 toward the middle, clamping the square tube.
[0037] Working principle: When using this device, place the square tube between the two vertical clamping plate groups 26, the fourth motor 31 works to drive the gear in the rack gear group 28 to rotate, thereby driving the rack to rotate, so that the two vertical clamping plate groups 26 move toward the middle, and then the second cylinder 29 works to move the two horizontal clamping plate groups 27 toward the middle to clamp and fix the square tube; Before grinding, first manually press the first telescopic rod 8 to make the first telescopic rod 8 disengage from the positioning hole on the rotating frame 6, and then move the position of the adjustment block 7 up and down according to the specifications of the square tube. When it moves to a suitable position, release the first telescopic rod 8 to extend the first telescopic rod 8 into other positioning holes; When the inner wall of the square tube needs to be polished, the first motor 3 is started, driving the screw group 2 to rotate, the screw group 2 drives the displacement plate 4 to move, the displacement plate 4 drives the polishing mechanism installed on the support block 10 to move to the inside of the square tube, the second motor 5 works to drive the rotating frame 6 to rotate, the rotating frame 6 drives the adjustment block 7, the second telescopic rod 9 and the support block 10 to rotate around the motor shaft of the second motor 5, due to the limitation of the square tube and the extension of the second telescopic rod 9, the polishing mechanism is driven to make a square track on the inner wall of the square tube to polish the inner wall of the square tube; When it is necessary to grind the corners of the square tube, in order to prevent the second telescopic rod 9 from moving during grinding, the support block 10 is manually pressed to press the positioning slide block 14 downward, and the positioning tube 15 limits the inclined surface of the positioning slide block 14. The spring on the positioning slide block 14 is compressed, and the positioning slide block 14 enters the positioning tube 15. When encountering the positioning groove in the positioning tube 15, the spring recovers, and the positioning slide block 14 is clamped into the positioning grooves on both sides of the positioning tube 15, locking the second telescopic rod 9, and then adjusting the position of the adjusting block 7 to make the grinding mechanism coaxial with the second motor 5; the third cylinder 30 is extended during operation, driving the connecting block 17 to move outside the square groove of the grinding head 16, and then the first cylinder 20 is started, driving the rotating rod 25 to rotate, and due to the limitation of the hollow screw rod 22 by the internal sliding groove of the hollow screw rod 22, the rotating rod 25 drives the hollow screw rod 22 22 rotates, and due to the limitation of the hollow screw 22 by the thread of the upper part of the inner cylinder 21, the hollow screw 22 begins to move toward the outside of the inner cylinder 21, and the hollow screw 22 drives the center cylinder 24 to move outward. Since the thread of the center screw 23 does not rotate, the internal thread of the upper part of the hollow screw 22 cooperates with the thread of the center screw 23. Therefore, the rotation of the hollow screw 22 will drive the center screw 23 to move relative to the outside of the hollow screw 22, and the center screw 23 drives the outer cylinder 18 to move toward the outside of the hollow screw 22, thereby completing the extension and retraction of the telescopic kit, and pushing the four corner grinding blocks 19 to the four corners of the inner wall of the square tube. The grinding mechanism installed on the support block 10 is driven by the displacement plate 4 to move to the inside of the square tube, and the four corners of the inner wall of the square tube are ground by the corner grinding blocks 19.
[0038] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes may be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A metal pipe inner wall grinding device, characterized in that: include: A workbench (1), a grinding adjustment mechanism, a grinding mechanism, and a square tube clamping mechanism. The workbench (1) is provided with a grinding adjustment mechanism and a square tube clamping mechanism, and the grinding mechanism is mounted on a support block (10) provided with the grinding adjustment mechanism; the grinding mechanism comprises a third motor (11), a power rod (12), a hollow cylinder (13), and a grinding assembly, the third motor (11) is fixedly mounted inside the support block (10), the motor shaft of the third motor (11) is fixedly connected to one end of the power rod (12), the power rod (12) is rotatably mounted inside the hollow cylinder (13), and one end of the hollow cylinder (13) is fixedly connected to the support block (10); The grinding assembly comprises a grinding head (16), a connecting block (17), a third cylinder (30) and a telescopic kit; the grinding head (16) is fixedly connected to the power rod (12); the outer side of the grinding head (16) is a frosted surface; the third cylinder (30) is fixedly installed at the center of the square groove of the grinding head (16); the piston rod of the third cylinder (30) is fixedly connected to the connecting block (17); there are four telescopic kits, which are respectively located on four sides of the connecting block (17); the telescopic kits comprise an outer cylinder (18), an edge grinding block (19), a first cylinder (20), an inner cylinder (21), a hollow screw (22), a center screw (23), a center cylinder (24) and a rotating rod (25); the first cylinder (20) is fixedly installed on the side of the connecting block (17); Inside, the piston rod of the first cylinder (20) is fixedly connected to the rotating rod (25), the inner cylinder (21) is fixedly mounted on the side of the connecting block (17), the hollow screw rod (22) is slidably connected to the rotating rod (25) through a slide groove inside the hollow screw rod (22), the external thread of the hollow screw rod (22) is matched with the thread of the upper half of the inner cylinder (21), the internal thread of the upper half of the hollow screw rod (22) is matched with the thread of the center screw (23), the upper end of the center cylinder (24) is rotatably connected to the hollow screw rod (22), the center screw (23) is fixedly mounted inside the outer cylinder (18), the outer cylinder (18) is slidably connected to the center cylinder (24) through the internal slide groove, and the corner grinding block (19) is fixedly mounted on the top of the outer cylinder (18).
2. A metal pipe inner wall grinding device according to claim 1, characterized in that: The outer side surface of the corner grinding block (19) is a frosted surface.
3. A metal pipe inner wall grinding device according to claim 1, characterized in that: The grinding adjustment mechanism comprises a lead screw assembly (2), a first motor (3), a displacement plate (4), a second motor (5), a rotating frame (6), an adjustment block (7), a second telescopic rod (9) and a support block (10); The two lead screw groups (2) are both rotatably mounted on the workbench (1), one end of the lead screw group (2) is provided with a transmission wheel, and the transmission wheels on the two lead screw groups (2) are connected by a transmission belt. The first motor (3) is fixedly mounted on the workbench (1), and the motor shaft of the first motor (3) is fixedly connected to one end of one of the lead screw groups (2). The displacement plate (4) is threadedly matched with the two lead screw groups (2) through a threaded hole. The second motor (5) is fixedly mounted on the displacement plate (4), and the motor shaft of the second motor (5) is fixedly connected to the rotating frame (6). The adjustment block (7) is slidably mounted on the positioning column of the rotating frame (6) through a circular hole. The upper end of the second telescopic rod (9) is fixedly connected to the support block (10), and the lower end of the second telescopic rod (9) is fixedly connected to the adjustment block (7).
4. A metal pipe inner wall grinding device according to claim 3, characterized in that: The grinding adjustment mechanism further comprises a first telescopic rod (8), the first telescopic rod (8) being fixedly mounted on the side of the adjustment block (7), and a plurality of positioning holes being provided on the rotating frame (6).
5. A metal pipe inner wall grinding device according to claim 3, characterized in that: The grinding adjustment mechanism further comprises a positioning slider (14) and a positioning cylinder (15); the positioning slider (14) is slidably mounted in a slide groove of a middle long rod on the lower end surface of the support block (10); an inclined surface is provided on the outer side of the positioning slider (14); a spring is provided on the inner side of the positioning slider (14); and the positioning cylinder (15) is fixedly mounted at a middle position of the upper end surface of the adjustment block (7).
6. A metal pipe inner wall grinding device according to claim 5, characterized in that: The locking tube (15) is provided with an oblique locking groove inside.
7. A metal pipe inner wall grinding device according to claim 1, characterized in that: The square tube clamping mechanism comprises a vertical clamping plate group (26), a horizontal clamping plate group (27), a rack and pinion group (28), a second cylinder (29) and a fourth motor (31); There are two vertical clamping plate groups (26), both of which are slidably mounted in the slide grooves of the workbench (1); the horizontal clamping plate groups (27) are slidably mounted in the slide grooves on the two vertical clamping plate groups (26), respectively, and one horizontal clamping plate group (27) is located at the upper half of the slide groove of the right vertical clamping plate group (26), and the other horizontal clamping plate group (27) is located at the lower half of the slide groove of the left vertical clamping plate group (26); a second cylinder (29) is provided below the left horizontal clamping plate group (27), and a second cylinder (29) is provided above the right horizontal clamping plate group (27); gear The gear set (28) comprises two racks and a cylindrical gear, wherein one end of one of the racks is fixedly connected to the vertical clamping plate set (26) on the left, and the other end is slidably connected to the vertical clamping plate set (26) on the right; one end of the other rack is fixedly connected to the vertical clamping plate set (26) on the right, and the other end is slidably connected to the vertical clamping plate set (26) on the left; the cylindrical gear meshes with the two racks; the fourth motor (31) is fixedly mounted on the workbench (1); and the motor shaft of the fourth motor (31) is fixedly connected to the cylindrical gear in the first cylinder (20).