Metal pipe polishing device for hardware mechanical fittings

Abstract

This utility model discloses a metal pipe grinding device for hardware and machinery parts, including a worktable. A fixing component is provided on the top of the worktable, and a grinding component is provided on the outer side of the worktable. The fixing component includes two support plates, and a universal ball wheel is fixedly installed on the inner end of the fourth screw. The spherical surface of the universal ball wheel is in contact with the outer back of the metal pipe. This utility model relates to the field of metal pipe grinding technology. In this metal pipe grinding device for hardware and machinery parts, the fixing component adopts multiple sets of fixing struts that expand and fix synchronously from the inner wall, which can adapt to metal pipes of different inner diameters and is fixed firmly to avoid shaking during grinding. In the grinding component, the arc-shaped grinding disc and the universal ball wheel are in contact with the metal pipe from the front and rear sides. With the rotation of the metal pipe itself and the axial movement of the grinding disc, the outer wall of the metal pipe can be ground in all directions without dead angles, ensuring grinding uniformity and greatly improving grinding quality.

Description

Technical Field

[0001] This utility model relates to the field of metal pipe grinding technology, specifically a metal pipe grinding device for hardware and machinery parts. Background Technology

[0002] Metal pipe polishing is a process that uses tools such as sandpaper, grinding wheels, and wire wheels to cut and grind the surface of metal pipes. Its core purpose is to remove defects such as oxide scale, rust, burrs, and scratches from the surface of the pipes, while optimizing the surface roughness to give the pipes a smooth and even texture.

[0003] Patent publication number "CN219901411U" discloses "A grinding device for ship metal pipes. It includes a worktable with a first elongated hole in the center along its length. Second elongated holes are respectively formed on the worktable on both sides of the first elongated hole along its length. A rotating and fixing mechanism for the metal pipe is installed in the first elongated hole, and a grinding mechanism spans between the two second elongated holes. First, the metal pipe is fixed by the rotating and fixing mechanism, then the metal pipe is rotated by the rotating and fixing mechanism. The grinding mechanism spans between the two second elongated holes and grinds the outer wall of the metal pipe. The grinding mechanism moves along the second elongated holes, thereby ensuring uniform grinding of the ends and outer wall of the metal pipe. It eliminates the need for manual grinding of the metal pipe against the grinding machine, preventing uneven grinding of the ends of the metal pipe due to human factors, and thus improving grinding efficiency."

[0004] In the aforementioned patent, when grinding the pipe, a ring-shaped grinding device is formed by two semi-circles fastened to the outside of the pipe to grind the outside of the pipe. This grinding method results in less force between the grinding device and the pipe, which in turn results in less friction between the two, thus affecting the overall grinding effect.

[0005] To address this problem, the present invention provides a metal pipe grinding device for hardware and machinery parts. Utility Model Content

[0006] To address the shortcomings of existing technologies, this utility model provides a metal pipe grinding device for hardware and machinery parts, which solves the aforementioned problems.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a metal pipe grinding device for hardware machinery parts, comprising a worktable, a fixing component on the top of the worktable, and a grinding component on the outer side of the worktable. The fixing component includes two support plates, with the right support plate fixedly installed on the top of the worktable and the left support plate slidably connected to the top of the worktable. A rotating disk is rotatably connected inside the support plate, and a second sliding groove is formed inside the rotating disk. A second slider is slidably connected inside the second sliding groove. Fixed support rods are fixedly installed on opposite sides of the left and right second sliders. A metal tube is sleeved on the outer side of the fixed support rod, and the fixed support rod is attached to the inner wall of the metal tube. The grinding assembly includes two third sliders, which are slidably connected to the top of the worktable. A vertical rod is fixedly installed on the top of the third slider. The two vertical rods are located on the front and rear sides of the worktable, respectively. A third screw is screwed into the interior of the front vertical rod, and an arc-shaped grinding disc is rotatably connected to the inner end of the third screw. The arc-shaped grinding disc is attached to the outer side of the metal tube. A fourth screw is screwed into the interior of the rear vertical rod, and a universal ball wheel is fixedly installed on the inner end of the fourth screw. The spherical surface of the universal ball wheel is attached to the outer back of the metal tube.

[0008] Preferably, a third knob is fixedly installed on the outer end of the third screw, a first limiting rod is fixedly installed on the outer side of the arc-shaped grinding disc, the first limiting rod movably passes through the interior of the front vertical rod, and a fourth knob is fixedly installed on the outer end of the fourth screw.

[0009] Preferably, the bottom of the workbench has two side plates fixedly installed, a fifth screw is rotatably connected between the side plates, a fourth slider is screwed to the outside of the fifth screw, and connecting rods are fixedly installed between the front and rear sides of the fourth slider and the corresponding third slider.

[0010] Preferably, a second limiting rod is fixedly installed between the two side plates. The second limiting rod movably passes through the interior of the fourth slider. A second rotating rod is rotatably connected to the right side of the right side plate. A rocker wheel is fixedly installed on the outer side of the second rotating rod. The inner end of the second rotating rod movably passes through the interior of the side plate and is fixedly connected to the fifth screw.

[0011] Preferably, the workbench has a first sliding groove inside, a first slider is slidably connected inside the first sliding groove, the first slider is fixedly installed at the bottom of the left support plate, a first screw is rotatably connected inside the first sliding groove, the first screw moves through the inside of the first slider, a first rotating rod is rotatably connected to the left side of the workbench, a first knob is fixedly installed at the outer end of the first rotating rod, and the inner end of the first rotating rod moves through the inside of the workbench and is fixedly connected to the first screw.

[0012] Preferably, a slide rod is fixedly installed inside the second slide groove, and the second slider is slidably connected inside the corresponding slide rod, with the included angle between adjacent second slide grooves being 120 degrees.

[0013] Preferably, a second screw is rotatably connected to the outer end of the rotating disk, a second knob is fixedly installed on the outer end of the second screw, a moving block is screwed to the outer side of the second screw, and a connecting rod is hinged between the moving block and the corresponding second slider.

[0014] Preferably, a motor is fixedly installed on the top of the workbench, a gear is fixedly installed on the output end of the motor, a rotating cylinder is fixedly installed on the outer end of the right rotating disk, and a gear ring is fixedly installed on the outer side of the rotating cylinder, the gear ring meshing with the gear.

[0015] Beneficial effects

[0016] This utility model provides a metal tube grinding device for hardware and machinery parts. Compared with the prior art, it has the following advantages:

[0017] 1. This metal pipe grinding device for hardware machinery parts uses multiple sets of fixed support rods that expand and fix synchronously from the inner wall, which can adapt to metal pipes of different inner diameters and is firmly fixed to avoid shaking during grinding; the arc-shaped grinding disc and universal ball wheel in the grinding component are attached to the metal pipe from the front and rear sides, and with the rotation of the metal pipe itself and the axial movement of the grinding disc, the outer wall of the metal pipe can be ground in all directions without dead angles, ensuring grinding uniformity and greatly improving grinding quality.

[0018] 2. This metal pipe grinding device for hardware and machinery parts has all adjustment components (such as the first to fourth knobs, rocker wheels, and rotary wheels) that are manually operated. The structure is simple and easy to understand, making it convenient for operators to make quick adjustments. The device achieves multi-dimensional adjustment through screws, sliders, and other structures, and can be adapted to metal pipes of different lengths and diameters. It has a wide range of applications and reduces the equipment replacement cost when grinding metal pipes of different specifications. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0020] Figure 1 This is a perspective view of the external structure of this utility model;

[0021] Figure 2 This is a perspective view of the top structure of this utility model;

[0022] Figure 3 This is a three-dimensional view of the overall bottom structure of this utility model;

[0023] Figure 4 This is a side view of the structure of this utility model.

[0024] Figure 5 This is a perspective view of the inner structure of the fixing component of this utility model;

[0025] Figure 6 This is a three-dimensional view of the external structure of this utility model.

[0026] In the diagram: 1. Workbench; 2. Fixing assembly; 21. Support plate; 22. First slide groove; 23. First slider; 24. First screw; 25. First rotating rod; 26. First knob; 27. Rotary disk; 28. Second slide groove; 29. ​​Second slider; 210. Slide rod; 211. Fixed support rod; 212. Moving block; 213. Connecting rod; 214. Second screw; 215. Second knob; 3. Grinding assembly; 31. Third slider; 3 2. Connecting rod; 33. Vertical rod; 34. Third screw; 35. Third knob; 36. First limit rod; 37. Arc-shaped grinding disc; 38. Fourth screw; 39. Fourth knob; 310. Universal ball wheel; 311. Fourth slider; 312. Side plate; 313. Fifth screw; 314. Second limit rod; 315. Second rotating rod; 316. Rocker wheel; 4. Metal tube; 5. Rotating cylinder; 6. Gear ring; 7. Motor; 8. Gear. Detailed Implementation

[0027] It should be noted that in the description of the embodiments of this application, the terms "front," "rear," "left," "right," "up," "down," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. The terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0028] The present application will be further described in detail below with reference to the accompanying drawings and embodiments.

[0029] Reference Figures 1 to 6This application provides a metal pipe grinding device for hardware machinery parts, including a worktable 1. A fixing component 2 is provided on the top of the worktable 1, and a grinding component 3 is provided on the outer side of the worktable 1. The fixing component 2 includes two support plates 21. The right support plate 21 is fixedly installed on the top of the worktable 1, and the left support plate 21 is slidably connected to the top of the worktable 1. A rotating disk 27 is rotatably connected inside the support plate 21. A second sliding groove 28 is opened inside the rotating disk 27. A second slider 29 is slidably connected inside the second sliding groove 28. Fixed support rods 211 are fixedly installed on opposite sides of the left and right second sliders 29. Metal fittings are sleeved on the outer sides of the left and right fixed support rods 211. The metal tube 4 is fixed with a support rod 211 attached to the inner wall of the metal tube 4. The grinding assembly 3 includes two third sliders 31, which are slidably connected to the top of the worktable 1. A vertical rod 33 is fixedly installed on the top of the third slider 31. The two vertical rods 33 are located on the front and rear sides of the worktable 1, respectively. A third screw 34 is screwed into the interior of the front vertical rod 33. An arc-shaped grinding disc 37 is rotatably connected to the inner end of the third screw 34. The arc-shaped grinding disc 37 is attached to the outer side of the metal tube 4. A fourth screw 38 is screwed into the interior of the rear vertical rod 33. A universal ball wheel 310 is fixedly installed on the inner end of the fourth screw 38. The spherical surface of the universal ball wheel 310 is attached to the outer back of the metal tube 4.

[0030] A third knob 35 is fixedly installed on the outer end of the third screw 34. A first limiting rod 36 is fixedly installed on the outer side of the arc-shaped grinding disc 37. The first limiting rod 36 moves through the interior of the front vertical rod 33. A fourth knob 39 is fixedly installed on the outer end of the fourth screw 38. Two side plates 312 are fixedly installed at the bottom of the worktable 1. A fifth screw 313 is rotatably connected between the side plates 312. A fourth slider 311 is screwed to the outer side of the fifth screw 313. Connecting rods 32 are fixedly installed on the front and rear sides of the fourth slider 311 and the corresponding third slider 31. A second limiting rod 314 is fixedly installed between the two side plates 312. The second limiting rod 314 moves through the interior of the fourth slider 311. A second rotating rod 315 is rotatably connected to the right side of the right side plate 312. A rocker wheel 316 is fixedly installed on the outer side of the second rotating rod 315. The inner end of the second rotating rod 315 moves through the interior of the side plate 312 and is fixedly connected to the fifth screw 313.

[0031] In this embodiment, rotating the third knob 35 causes the third screw 34 to rotate, thereby driving the arc-shaped grinding disc 37, which is rotatably connected to the inner end, to move closer to or away from the metal tube 4. At the same time, the first limiting rod 36, which is fixedly installed on the outer side of the arc-shaped grinding disc 37, moves through the front vertical rod 33 to limit the movement and ensure that the arc-shaped grinding disc 37 moves smoothly so that it can fit tightly against the outer side of the metal tube 4 for grinding. Rotating the fourth knob 39 causes the fourth screw 38 to rotate, driving the universal ball wheel 310, which is fixedly installed on the inner end, to move closer to or away from the metal tube 4. The spherical surface of the universal ball wheel 310 fits against the outer back of the metal tube 4. Through the mutual contact and compression between the front arc-shaped grinding disc 37 and the rear universal ball wheel 310, a large frictional force is ensured between the arc-shaped grinding disc 37 and the metal tube 4, thereby ensuring the grinding effect.

[0032] Rotating the second rotating rod 315 on the right side of the right side plate 312 facilitates operation. The rocker wheel 316 on the outer side of the second rotating rod 315 is easy to operate. The inner end of the second rotating rod 315 passes through the side plate 312 and is fixed with the fifth screw 313. When the second rotating rod 315 is rotated, the fifth screw 313 rotates, causing the fourth slider 311 to slide on the second limiting rod 314. The second limiting rod 314 is fixed between the two side plates 312 and moves through the interior of the fourth slider 311, playing a guiding role. Then, through the connecting rod 32, the third slider 31 slides on the top of the worktable 1, thereby causing the arc-shaped grinding disc 37 to move left and right, so that the entire metal tube 4 can be completely ground.

[0033] Reference Figures 1 to 6 In one aspect of this embodiment, the workbench 1 has a first slide groove 22 inside, and a first slider 23 is slidably connected inside the first slide groove 22. The first slider 23 is fixedly installed at the bottom of the left support plate 21. A first screw 24 is rotatably connected inside the first slide groove 22, and the first screw 24 moves through the inside of the first slider 23. A first rotating rod 25 is rotatably connected to the left side of the workbench 1. A first knob 26 is fixedly installed at the outer end of the first rotating rod 25, and the inner end of the first rotating rod 25 moves through the inside of the workbench 1 and is fixedly connected to the first screw 24. A slide rod 210 is fixedly installed inside the second slide groove 28. Block 29 is slidably connected inside the corresponding slide bar 210. The included angle between adjacent second slide grooves 28 is 120 degrees. The outer end of the rotating disk 27 is rotatably connected to the second screw 214. The outer end of the second screw 214 is fixedly installed with the second knob 215. The outer side of the second screw 214 is screwed with the moving block 212. The moving block 212 and the corresponding second slider 29 are hinged with the connecting rod 213. The top of the worktable 1 is fixedly installed with the motor 7. The output end of the motor 7 is fixedly installed with the gear 8. The outer end of the right rotating disk 27 is fixedly installed with the rotating cylinder 5. The outer side of the rotating cylinder 5 is fixedly installed with the gear ring 6. The gear ring 6 and the gear 8 mesh with each other.

[0034] In this embodiment, before starting the grinding operation on the metal tube 4, the primary task is to precisely adjust the relative positions of the two support plates 21 in the fixing assembly 2 according to the actual length of the metal tube 4. The left support plate 21 is slidably connected to the top of the workbench 1. Specifically, the sliding structure is as follows: a first groove 22 is pre-cut inside the workbench 1. A first slider 23 slides within the first groove 22, and the first slider 23 is securely fixed to the bottom of the left support plate 21. At the same time, a first screw 24 is rotatably connected within the first groove 22. The first screw 24 passes through the first slider 23 and forms a thread with the first slider 23. In coordination, when the position of the left support plate 21 needs to be adjusted, the first rotating rod 25 on the left side of the worktable 1 is rotated. The outer end of the first rotating rod 25 is equipped with a first knob 26 for easy operation, and the inner end moves through the inside of the worktable 1 and is fixedly connected to the first screw 24. Rotating the first knob 26 drives the first rotating rod 25 to rotate, which in turn drives the first screw 24 to rotate. Due to the threaded engagement between the first slider 23 and the first screw 24 and the limiting position of the first slider 23 in the first slide groove 22, the first slider 23 will move along the first slide groove 22, thereby driving the left support plate 21 to slide smoothly, so that the distance between the two support plates 21 can be precisely adapted to the length of the metal tube 4.

[0035] Then, carefully place the metal tube 4 outside the fixed support rods 211 on both sides. At this time, start the metal tube 4 fixing process by rotating the second knob 215 on the outside of the right rotating disk 27. The second knob 215 is fixedly connected to the second screw 214. When the second knob 215 is rotated, the second screw 214 rotates synchronously. Inside the rotating disk 27, a moving block 212 is screwed to the outside of the second screw 214. As the second screw 214 rotates, the moving block 212 will move along the axial direction of the screw inside the rotating disk 27. The moving block 212 is hinged to the corresponding second slider 29 through the connecting rod 213. When the moving block 212 moves, it will push the second slider 29 into the second groove 28 through the connecting rod 213. It is worth noting that a slide rod 210 is fixedly installed inside the second slide groove 28, and the second slider 29 is slidably connected inside the corresponding slide rod 210. This not only ensures the stability of the sliding of the second slider 29, but also restricts its movement trajectory. Moreover, the included angle between adjacent second slide grooves 28 is designed to be 120 degrees. This special angle layout allows the fixed support rod 211 to expand outward in a uniform and stable manner when the three second sliders 29 slide synchronously. As the fixed support rod 211 continues to expand outward until it is tightly attached to the inner wall of the metal tube 4, the metal tube 4 is firmly fixed under the joint action of the fixed support rods 211 on both the left and right sides, laying a solid foundation for subsequent grinding operations.

[0036] After the metal tube 4 is fixed, the motor 7 is started. The motor 7 is firmly installed on the top of the workbench 1, and its output end is fixedly connected to the gear 8. A rotating cylinder 5 is fixedly installed on the outer end of the right rotating disk 27, and a gear ring 6 is fixedly installed on the outer side of the rotating cylinder 5. When the motor 7 starts running, the rotational power of its output end is transmitted to the gear 8, causing the gear 8 to start rotating. Since the gear 8 and the gear ring 6 mesh with each other, according to the gear transmission principle, the rotation of the gear 8 will drive the gear ring 6 to rotate, which in turn causes the rotating cylinder 5 to drive the right rotating disk 27 to rotate around its own axis. Since the metal tube 4 is tightly connected to the rotating disk 27 through the fixed support rod 211, the rotation of the right rotating disk 27 will drive the metal tube 4 to rotate synchronously through the fixed support rod 211. At the same time, the left rotating disk 27 is also connected to the metal tube 4 through the fixed support rod 211, so the left rotating disk 27 will also rotate with the metal tube 4. Finally, the metal tube 4 is rotated in a stable speed under the coordinated drive of the two rotating disks 27, which creates the necessary conditions for the grinding assembly 3 to uniformly grind its outer wall.

[0037] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

[0038] Working principle: This metal tube grinding device for hardware machinery parts achieves precise grinding of the metal tube 4 through the coordinated operation of the fixing component 2 and the grinding component 3. In the fixing stage, firstly, according to the length of the metal tube 4, the first knob 26 is rotated to drive the first screw 24 to rotate, so that the left support plate 21 slides along the first slide groove 22, and the distance between the two support plates 21 is adjusted to match the length of the metal tube 4; then, the second knob 215 is rotated, which pushes the moving block 212 through the second screw 214, and drives the second slider 29 to slide along the second slide groove 28 through the connecting rod 213, so that the fixed support rod 211 expands outward synchronously and fits tightly against the alloy. The inner wall of the metal tube 4 is fixed. During grinding, the motor 7 is started, and the rotating disk 27 and the metal tube 4 are driven to rotate through the meshing transmission of the gear 8 and the gear ring 6. The third knob 35 is turned to adjust the third screw 34 so that the arc-shaped grinding disc 37 is close to and fits against the outside of the metal tube 4. At the same time, the fourth knob 39 is turned to let the universal ball wheel 310 fit against the metal tube 4 from the back to assist in positioning. The rocker wheel 316 is turned, and the fourth slider 311 and the third slider 31 are driven to move through the fifth screw 313, so that the arc-shaped grinding disc 37 moves along the axial direction of the metal tube 4 to achieve comprehensive and uniform grinding of the outer wall of the rotating metal tube 4.

[0039] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0040] Although embodiments of this application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A metal pipe grinding device for hardware machinery parts, comprising a worktable (1), characterized in that: A fixing component (2) is provided on the top of the workbench (1), and a grinding component (3) is provided on the outside of the workbench (1). The fixing component (2) includes two support plates (21). The right support plate (21) is fixedly installed on the top of the workbench (1), and the left support plate (21) is slidably connected to the top of the workbench (1). A rotating disk (27) is rotatably connected inside the support plate (21). A second sliding groove (28) is opened inside the rotating disk (27). A second slider (29) is slidably connected inside the second sliding groove (28). A fixing support rod (211) is fixedly installed on the opposite side of the left and right second sliders (29). A metal tube (4) is sleeved on the outside of the fixing support rod (211) on both sides. The fixing support rod (211) is attached to the metal tube. The inner wall of the metal tube (4) is provided with a grinding assembly (3) comprising two third sliders (31). The third sliders (31) are slidably connected to the top of the workbench (1). A vertical rod (33) is fixedly installed on the top of the third sliders (31). The two vertical rods (33) are located on the front and rear sides of the workbench (1). A third screw (34) is screwed into the front vertical rod (33). An arc-shaped grinding disc (37) is rotatably connected to the inner end of the third screw (34). The arc-shaped grinding disc (37) is attached to the outer side of the metal tube (4). A fourth screw (38) is screwed into the rear vertical rod (33). A universal ball wheel (310) is fixedly installed on the inner end of the fourth screw (38). The spherical surface of the universal ball wheel (310) is attached to the back outer side of the metal tube (4).

2. The metal pipe grinding device for hardware machinery parts according to claim 1, characterized in that: A third knob (35) is fixedly installed on the outer end of the third screw (34), a first limiting rod (36) is fixedly installed on the outer side of the arc-shaped grinding disc (37), the first limiting rod (36) moves through the interior of the front vertical rod (33), and a fourth knob (39) is fixedly installed on the outer end of the fourth screw (38).

3. The metal pipe grinding device for hardware machinery parts according to claim 1, characterized in that: Two side plates (312) are fixedly installed at the bottom of the workbench (1). A fifth screw (313) is rotatably connected between the side plates (312). A fourth slider (311) is screwed to the outside of the fifth screw (313). Connecting rods (32) are fixedly installed between the front and rear sides of the fourth slider (311) and the corresponding third slider (31).

4. The metal tube grinding device for hardware machinery parts according to claim 3, characterized in that: A second limiting rod (314) is fixedly installed between the two side plates (312). The second limiting rod (314) moves through the interior of the fourth slider (311). A second rotating rod (315) is rotatably connected to the right side of the right side plate (312). A rocker wheel (316) is fixedly installed on the outer side of the second rotating rod (315). The inner end of the second rotating rod (315) moves through the interior of the side plate (312) and is fixedly connected to the fifth screw (313).

5. The metal tube grinding device for hardware machinery parts according to claim 1, characterized in that: The workbench (1) has a first slide groove (22) inside, and a first slider (23) is slidably connected inside the first slide groove (22). The first slider (23) is fixedly installed at the bottom of the support plate (21) on the left side. A first screw (24) is rotatably connected inside the first slide groove (22). The first screw (24) moves through the inside of the first slider (23). A first rotating rod (25) is rotatably connected to the left side of the workbench (1). A first knob (26) is fixedly installed on the outer end of the first rotating rod (25). The inner end of the first rotating rod (25) moves through the inside of the workbench (1) and is fixedly connected to the first screw (24).

6. The metal tube grinding device for hardware machinery parts according to claim 1, characterized in that: The second slide groove (28) has a slide rod (210) fixedly installed inside it, and the second slider (29) is slidably connected inside the corresponding slide rod (210). The included angle between adjacent second slide grooves (28) is 120 degrees.

7. A metal tube grinding device for hardware machinery parts according to claim 6, characterized in that: The outer end of the rotating disk (27) is rotatably connected to a second screw (214), the outer end of the second screw (214) is fixedly installed with a second knob (215), the outer side of the second screw (214) is screwed with a moving block (212), and the moving block (212) is hinged to the corresponding second slider (29) with a connecting rod (213).

8. The metal tube grinding device for hardware machinery parts according to claim 1, characterized in that: A motor (7) is fixedly installed on the top of the workbench (1), and a gear (8) is fixedly installed on the output end of the motor (7). A rotating cylinder (5) is fixedly installed on the outer end of the right rotating disk (27), and a gear ring (6) is fixedly installed on the outer side of the rotating cylinder (5). The gear ring (6) meshes with the gear (8).

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