Hardware polishing machine tool

Abstract

The invention provides a hardware polishing machine tool, and relates to the technical field of machining devices, the hardware polishing machine tool comprises an operation table, and a fixing plate is fixedly mounted at the top end of the operation table. According to the automatic polishing device, by arranging the operation table and the fixing plate structure, when the device is used, the first motor is arranged to move, automatic polishing can be achieved, the polishing tool does not need to be manually held for operation, the polishing consistency and precision can be guaranteed, and the requirement of large-scale industrial production for product quality stability is met. And meanwhile, the grinding efficiency can be improved, the time cost is saved, the risk of misoperation is avoided, and the product percent of pass is effectively increased. Besides, for some hardware workpieces with complex shapes, a plurality of structures of gears are arranged to perform matched movement, so that the workpieces can be stably clamped, the situations that the workpieces are easy to shift, shake and the like in the polishing process are avoided, the polishing effect is prevented from being influenced, meanwhile, excessive abrasion of a polishing tool can be effectively reduced, and the production cost is reduced.

Description

Technical Field

[0001] This invention relates to the field of processing equipment technology, and in particular to a metal grinding machine tool. Background Technology

[0002] In the hardware manufacturing industry, the polishing process is a crucial step in ensuring high-standard product surface quality. As the application range of hardware products becomes increasingly widespread, from everyday household goods to industrial components, the requirements for their processing precision and surface quality are also rising. During the manufacturing process of hardware products, such as through casting, forging, and stamping, imperfections such as burrs, flash, and pinholes often remain on the surface. Metal grinding machines utilize high-speed rotating abrasives to precisely remove imperfections that affect appearance and performance, resulting in smooth and flat surfaces that enhance overall product quality and aesthetics. For metal parts requiring high surface finish, such as precision tools and decorative items, grinding machines can use different grit abrasives to process the surface from coarse to fine grinding, achieving a mirror-like finish or meeting appropriate roughness standards to satisfy the appearance requirements of various applications. When rounding or chamfering the edges of metal parts, grinding machines can use abrasives to grind the corners according to set angles and curvatures, making them rounded. This not only prevents scratches to operators or other objects during use but also improves the feel and appearance of the product. Furniture handles and similar hardware often require this treatment.

[0003] However, traditional metal polishing methods often rely on manual hand-held polishing tools, which has several drawbacks. Firstly, manual polishing struggles to guarantee consistency and precision. The varying skill levels and operating habits of different operators lead to inconsistent product quality, failing to meet the demands of large-scale industrial production for stable product quality. Secondly, manual polishing is inefficient, especially when polishing a large number of metal parts, resulting in extremely high labor and time costs and severely hindering production progress. Furthermore, prolonged manual polishing can lead to significant labor intensity and fatigue for operators, increasing the risk of operational errors and potential damage to workpieces, further impacting product yield. Additionally, for complex-shaped and irregularly sized metal parts, traditional clamping methods struggle to ensure secure clamping, leading to workpiece displacement and wobbling during polishing. This not only affects the polishing effect but can also cause excessive wear on the polishing tools, increasing production costs and necessitating improvements. Summary of the Invention

[0004] The purpose of this invention is to solve the technical problems mentioned in the background section.

[0005] The present invention adopts the following technical solution: a hardware grinding machine tool, including an operating table, a fixed plate fixedly installed on the top of the operating table, a groove first formed on the surface of the fixed plate, a motor fixedly installed on the top of the operating table, a lead screw fixedly installed on the output end of the motor first, a support column fixedly installed on the top of the operating table, a groove second formed on the surface of the support column, a motor second fixedly installed on the top of the support column, a lead screw second fixedly installed on the output end of the motor second, a movable column first threadedly connected to the outer surface of the lead screw second, an arc-shaped protective shell fixedly installed on the other end of the movable column first, and a grinding disc sleeved inside the arc-shaped protective shell.

[0006] Preferably, the outer surface of the lead screw is threaded with a placement block, the surface of the placement block has a groove, a worm gear is fitted inside the groove, a handwheel is fixedly installed at one end of the worm gear, a worm wheel is fitted inside the groove, a gear is fixedly installed at the top of the worm wheel, a limit rod is fixedly installed inside the groove, a rack is fitted on the outer surface of the limit rod, a placement block is fixedly installed at the top of the rack, a placement groove is formed through the surface of the placement block, an operating groove is formed on the surface of the placement groove, a fixing frame and a fixing frame are fixedly installed inside the operating groove, a telescopic rod is fitted inside the fixing frame, a limit plate is fixedly installed on the surface of the telescopic rod, and a spring is fitted on the outer surface of the telescopic rod. One end of the telescopic rod is fixedly equipped with a bevel gear, and the other end is fixedly equipped with a lead screw. A movable plate is threaded onto the outer surface of the lead screw. A limit rod is fixedly installed on the surface of the movable plate. Movable columns are fitted inside both ends of the movable plate. An arc-shaped block and an arc-shaped block are fitted inside the other end of the movable column. A bevel gear is fitted inside the operating groove. A gear is fixedly installed at the rear end of the bevel gear. An annular block is fitted inside the operating groove. A rack is fixedly installed on the outer surface of the annular block. A rack is fixedly installed on the inner surface of the annular block. A gear is fitted inside the operating groove. A rotating rod is fixedly installed at the rear end of the gear. A handwheel is fixedly installed at the other end of the rotating rod. This allows for clamping or fixing of hardware parts in different directions and positions, meeting diverse polishing needs.

[0007] Preferably, a motor three is fixedly mounted on the surface of the arc-shaped protective shell, a rotating column one is fixedly mounted on the output end of the motor three, a limiting block one is fixedly mounted on the surface of the rotating column one, a limiting groove is formed through the surface of the grinding disc, a ball bearing is sleeved inside the arc-shaped protective shell, a rotating column two is sleeved inside the ball bearing, a limiting block two is fixedly mounted on one end of the rotating column two, a limiting plate two is fixedly mounted on the rear end of the limiting block two, and a tension spring is fixedly mounted on the outer surface of the rotating column two. Here, the motor three can drive the grinding disc to rotate, realizing a high-efficiency grinding function.

[0008] Preferably, the lead screw is fitted inside the first groove, and the second lead screw is fitted inside the second groove. The surface of the worm gear meshes with the surface of the worm wheel. There are two sets of rack one and limit rod one, symmetrically distributed inside the slide groove. The surface of gear one meshes with the surface of rack one. Here, the precise meshing relationship between the worm gear and worm wheel, and gear and rack, effectively transmits power, realizes coordinated movement between components, and ensures the accuracy and reliability of operation.

[0009] Preferably, the surface of bevel gear one meshes with the surface of bevel gear two, the surface of gear two meshes with the surface of rack two, and the surface of rack three meshes with the surface of gear three. There are four sets of bevel gears (bevel gear one, bevel gear two, gear two, and gear three) arranged circumferentially inside the operating slot. This circumferential arrangement of components makes power transmission and related operations within the operating slot more balanced and stable, improving overall performance and operational accuracy.

[0010] Preferably, one end of the first spring is connected and fixed to the surface of the first fixed frame, the limiting rod is sleeved inside the second fixed frame, the arc-shaped block is sleeved inside the second arc-shaped block, the number of the second placement blocks is two sets and they are symmetrically distributed at the upper end of the operating table, and the number of the first and second arc-shaped blocks is four sets and they are circumferentially distributed inside the placement slot. Here, the specific connection method of the first spring can provide elastic buffering when the relevant components move, ensure the smoothness of operation, and prevent rigid collisions between components.

[0011] Preferably, one end of the tension spring is connected and fixed to the rear end surface of the ball bearing, and the other end of the tension spring is connected and fixed to the surface of the rotating column two. The motor three is connected and fixed to the arc-shaped protective shell by bolts. Here, the bolt connection between the motor three and the arc-shaped protective shell is firm, facilitates installation, disassembly and maintenance, and ensures that the motor can stably drive the grinding disc to rotate.

[0012] Preferably, both the first limiting block and the second limiting block are fitted inside the limiting groove. The first limiting block and the second limiting block are in the shape of a cross, and the second limiting plate is in contact with the surface of the grinding disc. Here, the contact between the second limiting plate and the surface of the grinding disc further enhances the fixing and limiting effect on the grinding disc, reducing shaking and displacement during grinding.

[0013] Compared with the prior art, the advantages and positive effects of the present invention are as follows: 1. In this invention, by setting up an operating table and a fixed plate structure, automatic grinding is achieved through the movement of a motor during equipment use. This eliminates the need for manual operation with hand-held grinding tools, ensuring consistent and precise grinding and meeting the product quality stability requirements of large-scale industrial production. Simultaneously, it improves grinding efficiency, saves time and costs, avoids the risk of operational errors, and effectively increases the product qualification rate. Furthermore, for complex-shaped hardware workpieces, the coordinated movement of multiple gears ensures the workpiece is securely clamped, preventing displacement or shaking during grinding and thus avoiding affecting the grinding effect. It also effectively reduces excessive wear on grinding tools, lowering production costs.

[0014] 2. In this invention, by setting up a structure consisting of a motor (3), a rotating column (1), a limiting block (1), a limiting groove, a ball bearing, a rotating column (2), a limiting block (2), a limiting plate (2), and a tension spring, the coordinated movement of these multiple structures—tension spring, limiting plate (2), and limiting block (2)—allows for rapid replacement of the grinding disc when it wears or when different models of grinding discs are needed based on the material, shape, and grinding requirements of different hardware workpieces. This significantly reduces equipment downtime. Operators no longer need to spend a lot of time on the cumbersome grinding disc replacement process, allowing the machine tool to quickly return to working condition. This makes the entire grinding production process smoother and more efficient, helping to complete more grinding tasks per unit time and increasing production capacity. Attached Figure Description

[0015] Figure 1 This invention provides a three-dimensional structural schematic diagram of a hardware grinding machine tool; Figure 2 This invention provides a schematic diagram of the left end structure of a hardware grinding machine tool; Figure 3 This invention provides a schematic diagram of the right end structure of a hardware grinding machine tool; Figure 4 This invention provides a schematic diagram of the structure of a placement block for a hardware grinding machine tool; Figure 5 This invention provides a schematic diagram of the grinding disc structure of a hardware grinding machine tool; Figure 6This invention provides a partial structural schematic diagram of a hardware grinding machine tool; Figure 7 This invention proposes a hardware grinding machine tool. Figure 3 Enlarged view of point A in the middle; Figure 8 This invention proposes a hardware grinding machine tool. Figure 4 Enlarged view of section B in the middle.

[0016] Legend: 1. Operating table; 2. Fixing plate; 3. Groove 1; 4. Motor 1; 5. Lead screw 1; 6. Support column; 7. Groove 2; 8. Motor 2; 9. Lead screw 2; 10. Moving column 1; 11. Arc-shaped protective shell; 12. Grinding disc; 13. Placement block 1; 14. Slide groove; 15. Worm gear; 16. Handwheel 1; 17. Worm wheel; 18. Gear 1; 19. Limiting rod 1; 20. Rack 1; 21. Placement block 2; 22. Placement groove; 23. Operating groove; 24. Fixing frame 1; 25. Fixing frame 2; 26. Telescopic rod; 27. Limiting plate 1; 28. Spring 1; 29. ​​Bevel gear 1; 30. Lead screw 3; 31. Moving plate; 32. Limiting rod 2; 33. Moving column 2; 34. Arc block 1; 35. Arc block 2; 36. Bevel gear 2; 37. Gear 2; 38. Ring block; 39. Rack 2; 40. Rack 3; 41. Gear 3; 42. Rotating rod 2; 43. Handwheel 2; 44. Motor 3; 45. Rotating column 1; 46. Limiting block 1; 47. Limiting groove; 48. Ball bearing; 49. Rotating column 2; 50. Limiting block 2; 51. Limiting plate 2; 52. Tension spring. Detailed Implementation

[0017] To better understand the above-mentioned objectives, features, and advantages of the present invention, the present invention will be further described below in conjunction with the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0018] Numerous specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways than those described herein, and therefore the invention is not limited to the specific embodiments disclosed in the following specification.

[0019] Example 1 Please see Figures 1-8This invention provides a technical solution: a hardware grinding machine tool, including an operating table 1, a fixed plate 2 fixedly installed on the top of the operating table 1, a groove 3 formed on the surface of the fixed plate 2, a motor 4 fixedly installed on the top of the operating table 1, a lead screw 5 fixedly installed at the output end of the motor 4, a support column 6 fixedly installed on the top of the operating table 1, a groove 7 formed on the surface of the support column 6, a motor 8 fixedly installed on the top of the support column 6, a lead screw 9 fixedly installed at the output end of the motor 8, a moving column 10 threadedly connected to the outer surface of the lead screw 9, an arc-shaped protective shell 11 fixedly installed at the other end of the moving column 10, a grinding disc 12 sleeved inside the arc-shaped protective shell 11, and a placement block 13 threadedly connected to the outer surface of the lead screw 5. A groove 14 is formed on the surface of 13. A worm gear 15 is fitted inside the groove 14. A handwheel 16 is fixedly installed at one end of the worm gear 15. A worm wheel 17 is fitted inside the groove 14. A gear 18 is fixedly installed at the top of the worm wheel 17. A limit rod 19 is fixedly installed inside the groove 14. A rack 20 is fitted on the outer surface of the limit rod 19. A placement block 21 is fixedly installed at the top of the rack 20. A placement groove 22 is formed through the surface of the placement block 21. An operating groove 23 is formed on the surface of the placement groove 22. A fixing frame 24 and a fixing frame 25 are fixedly installed inside the operating groove 23. A telescopic rod 26 is fitted inside the fixing frame 24. A limit plate 27 is fixedly installed on the surface of the telescopic rod 26. A spring 28 is fitted inside the telescopic rod 26. A bevel gear 29 is fixedly installed at one end of the telescopic rod 26, and a lead screw 30 is fixedly installed at the other end of the telescopic rod 26. A movable plate 31 is threaded onto the outer surface of the lead screw 30. A limit rod 32 is fixedly installed on the surface of the movable plate 31. Movable columns 33 are fitted inside both ends of the movable plate 31. An arc-shaped block 34 and an arc-shaped block 35 are fitted inside the other end of the movable column 33. A bevel gear 36 is fitted inside the operating groove 23. A gear 37 is fixedly installed at the rear end of the bevel gear 36. An annular block 38 is fitted inside the operating groove 23. A rack 39 is fixedly installed on the outer surface of the annular block 38. A rack 40 is fixedly installed on the inner surface of the annular block 38. A gear 40 is fitted inside the operating groove 23. 1. A rotating rod 42 is fixedly installed at the rear end of gear 3 41, and a handwheel 43 is fixedly installed at the other end of the rotating rod 42. When using the equipment, firstly, the hand contacts the surface of handwheel 1 16, then rotates handwheel 1 16. The rotation of handwheel 1 16 drives worm gear 15 to rotate, then worm gear 15 drives worm wheel 17 to rotate, then worm wheel 17 drives gear 1 18 to rotate, then gear 1 18 drives rack 20 to move, then rack 20 drives placement block 2 21 to move. By moving placement block 2 21, the position to be clamped and fixed can be adjusted. Then, the workpiece to be ground is placed inside the placement groove 22, and then the hand contacts the surface of handwheel 2 43.Next, turn handwheel 2 43. The rotation of handwheel 2 43 drives rotating rod 2 42, which in turn drives gear 3 41. Gear 3 41 then drives rack 3 40, which in turn drives ring block 38, which in turn drives rack 2 39, which in turn drives gear 2 37, which in turn drives bevel gear 2 36, which in turn drives bevel gear 1 29, which in turn drives telescopic rod 26, which in turn drives lead screw 30, which in turn drives moving plate 31, which in turn drives limit rod 2 32, which in turn drives moving... The second column 33 moves, which in turn moves the first arc block 34 and the second arc block 35, thus clamping and fixing the workpiece. Since the first arc block 34 is fitted inside the second arc block 35, it can rotate during clamping, adapting to clamping and fixing workpieces of different shapes. Next, the second motor 8 is started, which drives the second lead screw 9 to rotate. The rotation of the lead screw 9 moves the first moving column 10, which in turn moves the arc-shaped protective shell 11, allowing adjustment of the grinding height. Then, the third motor 44 is started, which drives the grinding disc 12 to rotate, initiating grinding. Finally, the first motor 4 is started, which drives the lead screw 5 to rotate. The rotation of the lead screw 5 then moves the placement blocks 13 and 21, enabling mobile grinding without manual adjustment.

[0020] Please see Figures 1-8Lead screw 15 is fitted inside groove 3, lead screw 29 is fitted inside groove 27, the surface of worm 15 meshes with the surface of worm wheel 17, there are two sets of rack 120 and limit rod 19, which are symmetrically distributed inside slide groove 14, the surface of gear 18 meshes with the surface of rack 120, the surface of bevel gear 129 meshes with the surface of bevel gear 26, the surface of gear 237 meshes with the surface of rack 239, the surface of rack 330 meshes with the surface of gear 331, there are four sets of bevel gears 129, 236, 237, and 341, which are circumferentially distributed inside operating groove 23, one end of spring 28 is connected and fixed to the surface of fixed bracket 24, and the limit rod 19 is fixed to the surface of fixed bracket 24. Rod 19 is fitted inside the fixed frame 25, arc block 134 is fitted inside the arc block 25, there are two sets of placement blocks 21 symmetrically distributed at the top of the operating table 1, and four sets of arc blocks 134 and arc blocks 25 are circumferentially distributed inside the placement groove 22. One end of the tension spring 52 is connected and fixed to the rear end surface of the ball bearing 48, and the other end of the tension spring 52 is connected and fixed to the surface of the rotating column 29. Motor 344 is connected and fixed to the arc-shaped protective shell 11 by bolts. Limiting block 146 and limiting block 250 are both fitted inside the limiting groove 47. The shape of limiting block 146 and limiting block 250 is "+". Limiting plate 251 fits against the surface of the grinding disc 12. The cooperation between the "+" shaped limiting block and the limiting groove 47 can limit the grinding disc 12 in multiple directions, ensuring that its position is accurate and stable during rotation and improving the grinding accuracy.

[0021] Example 2 Please see Figure 5A motor 3 44 is fixedly mounted on the surface of the arc-shaped protective shell 11. A rotating column 1 45 is fixedly mounted on the output end of the motor 3 44. A limit block 1 46 is fixedly mounted on the surface of the rotating column 1 45. A limit groove 47 is formed through the surface of the grinding disc 12. A ball bearing 48 is sleeved inside the arc-shaped protective shell 11. A rotating column 2 49 is sleeved inside the ball bearing 48. A limit block 2 50 is fixedly mounted on one end of the rotating column 2 49. A limit plate 2 51 is fixedly mounted on the rear end of the limit block 2 50. A tension spring 52 is fixedly mounted on the outer surface of the rotating column 2 49. When the equipment needs to be replaced or maintained during grinding... When grinding disc 12, first, the hand contacts the surface of rotating column 2 49, then pull rotating column 2 49. The movement of rotating column 2 49 causes tension spring 52 to stretch. Then, the movement of rotating column 2 49 causes limiting plate 2 51 to move. Next, the movement of limiting plate 2 51 causes limiting block 2 50 to move. Then, the movement of limiting block 2 50 disengages from limiting groove 47. Then, the hand contacts the surface of grinding disc 12, then pulls grinding disc 12. The movement of grinding disc 12 disengages from limiting block 1 46, and replacement can then be performed.

[0022] Working principle: When using the equipment, firstly, the hand contacts the surface of handwheel 16, then rotates handwheel 16. The rotation of handwheel 16 drives worm gear 15 to rotate, which in turn drives worm wheel 17 to rotate. Worm wheel 17 then drives gear 18 to rotate, which in turn drives rack 20 to move. The movement of rack 20 then moves placement block 21. The position to be clamped and fixed is adjusted by moving placement block 21. Next, the workpiece to be ground is placed inside placement groove 22. Then, the hand contacts the surface of handwheel 43, and rotates handwheel 43. The rotation of handwheel 43 drives rotating rod 42 to rotate. The rotation of handwheel 43 then drives rotating rod 42. The rotation of lever 42 drives gear 41 to rotate, which in turn drives rack 40 to move. Rack 40 then drives ring block 38 to rotate, which in turn drives rack 39 to move. Rack 39 then drives gear 37 to rotate, which in turn drives bevel gear 36 to rotate. Bevel gear 36 then drives bevel gear 29 to rotate, which in turn drives telescopic rod 26 to rotate. Telescopic rod 26 then drives lead screw 30 to rotate, which in turn drives moving plate 31 to move. Moving plate 31 then drives limit lever 32 to move. The workpiece is then clamped and fixed by moving the moving plate 31, which in turn moves the moving column 33. The moving column then moves the arc-shaped block 34 and the arc-shaped block 35. Since the arc-shaped block 34 is fitted inside the arc-shaped block 35, it can rotate during clamping, adapting to workpieces of different shapes. Next, the motor 8 is started, which drives the lead screw 9 to rotate. The lead screw 9 then moves the moving column 10, which in turn moves the arc-shaped protective shell 11, allowing adjustment of the grinding height. Then, the motor 44 is started, which rotates the grinding disc 12, initiating grinding. Finally, the electric motor 44 is started. Machine 4, driven by motor 4, rotates lead screw 5. Lead screw 5 then moves placement blocks 13 and 21, enabling mobile grinding without manual adjustment. When the grinding disc 12 needs replacement or maintenance, the user first contacts the surface of rotating column 49 and pulls it. This movement of rotating column 49 stretches tension spring 52, which in turn moves limiting plate 51. Limiting plate 51 then moves limiting block 50, disengaging from limiting groove 47. The user then contacts the surface of grinding disc 12 again.Next, pull the grinding disc 12. As the grinding disc 12 moves, it disengages from the limiting block 46, allowing for replacement.

[0023] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the protection scope of the present invention.

Claims

1. A metal grinding machine tool, comprising an operating table (1), characterized in that: A fixing plate (2) is fixedly installed on the top of the operating table (1). A groove (3) is provided on the surface of the fixing plate (2). A motor (4) is fixedly installed on the top of the operating table (1). A lead screw (5) is fixedly installed on the output end of the motor (4). A support column (6) is fixedly installed on the top of the operating table (1). A groove (7) is provided on the surface of the support column (6). A motor (8) is fixedly installed on the top of the support column (6). A lead screw (9) is fixedly installed on the output end of the motor (8). A moving column (10) is threadedly connected to the outer surface of the lead screw (9). An arc-shaped protective shell (11) is fixedly installed on the other end of the moving column (10). A grinding disc (12) is sleeved inside the arc-shaped protective shell (11).

2. The hardware grinding machine tool according to claim 1, characterized in that: The outer surface of the lead screw (5) is threaded with a placement block (13). The surface of the placement block (13) is provided with a groove (14). A worm gear (15) is fitted inside the groove (14). A handwheel (16) is fixedly installed at one end of the worm gear (15). A worm wheel (17) is fitted inside the groove (14). A gear (18) is fixedly installed at the top of the worm wheel (17). A limit rod (19) is fixedly installed inside the groove (14). A rack (19) is fitted on the outer surface of the limit rod (19). 20), a second placement block (21) is fixedly installed at the top of the rack (20), a placement groove (22) is opened through the surface of the second placement block (21), an operation groove (23) is opened on the surface of the placement groove (22), a first fixing frame (24) and a second fixing frame (25) are fixedly installed inside the operation groove (23), a telescopic rod (26) is sleeved inside the first fixing frame (24), a limit plate (27) is fixedly installed on the surface of the telescopic rod (26), and a spring (25) is sleeved on the outer surface of the telescopic rod (26). 8) One end of the telescopic rod (26) is fixedly installed with a bevel gear (29), and the other end of the telescopic rod (26) is fixedly installed with a lead screw (30). The outer surface of the lead screw (30) is threaded with a moving plate (31). The surface of the moving plate (31) is fixedly installed with a limit rod (32). The two ends of the moving plate (31) are fitted with moving columns (33). The other end of the moving column (33) is fitted with an arc block (34) and an arc block (35). The inside of the operating groove (23) is fitted with a cone gear. Gear 2 (36), Gear 2 (37) is fixedly installed at the rear end of the bevel gear 2 (36), An annular block (38) is sleeved inside the operating groove (23), Rack 2 (39) is fixedly installed on the outer surface of the annular block (38), Rack 3 (40) is fixedly installed on the inner surface of the annular block (38), Gear 3 (41) is sleeved inside the operating groove (23), Rotating rod 2 (42) is fixedly installed at the rear end of the gear 3 (41), and Handwheel 2 (43) is fixedly installed at the other end of the rotating rod 2 (42).

3. The hardware grinding machine tool according to claim 1, characterized in that: The surface of the arc-shaped protective shell (11) is fixedly mounted with a motor three (44), the output end of the motor three (44) is fixedly mounted with a rotating column one (45), the surface of the rotating column one (45) is fixedly mounted with a limiting block one (46), the surface of the grinding disc (12) is opened through a limiting groove (47), the inside of the arc-shaped protective shell (11) is fitted with a ball bearing (48), the inside of the ball bearing (48) is fitted with a rotating column two (49), one end of the rotating column two (49) is fixedly mounted with a limiting block two (50), the rear end of the limiting block two (50) is fixedly mounted with a limiting plate two (51), and the outer surface of the rotating column two (49) is fixedly mounted with a tension spring (52).

4. A metal grinding machine tool according to claim 2, characterized in that: The lead screw 1 (5) is sleeved inside the groove 1 (3), the lead screw 2 (9) is sleeved inside the groove 2 (7), the surface of the worm (15) meshes with the surface of the worm wheel (17), the number of the rack 1 (20) and the limiting rod 1 (19) is two sets and they are symmetrically distributed inside the slide groove (14), and the surface of the gear 1 (18) meshes with the surface of the rack 1 (20).

5. A hardware grinding machine tool according to claim 2, characterized in that: The surface of bevel gear one (29) meshes with the surface of bevel gear two (36), the surface of gear two (37) meshes with the surface of rack two (39), and the surface of rack three (40) meshes with the surface of gear three (41). There are four sets of bevel gear one (29), bevel gear two (36), gear two (37) and gear three (41) and they are distributed in a circle inside the operating slot (23).

6. A hardware grinding machine tool according to claim 2, characterized in that: One end of the spring (28) is connected and fixed to the surface of the fixed frame (24). The limiting rod (19) is sleeved inside the fixed frame (25). The arc block (34) is sleeved inside the arc block (35). There are two sets of the placement block (21) and they are symmetrically distributed at the top of the operating table (1). There are four sets of the arc block (34) and the arc block (35) and they are circumferentially distributed inside the placement slot (22).

7. A hardware grinding machine tool according to claim 3, characterized in that: One end of the tension spring (52) is connected and fixed to the rear end surface of the ball bearing (48), and the other end of the tension spring (52) is connected and fixed to the surface of the rotating column (49). The motor (44) and the arc-shaped protective shell (11) are connected and fixed by bolts.

8. A hardware grinding machine tool according to claim 3, characterized in that: The first limiting block (46) and the second limiting block (50) are both fitted inside the limiting groove (47). The first limiting block (46) and the second limiting block (50) are in the shape of a cross. The second limiting plate (51) is in contact with the surface of the grinding disc (12).

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