Workpiece fine polishing apparatus

Abstract

The application relates to the technical field of workpiece polishing equipment, in particular to workpiece fine polishing equipment which comprises a vertical support, a polishing tank body arranged on the vertical support and used for containing polishing sand and workpieces to be polished, a driving mechanism used for driving the polishing tank body to rotate axially, and a screening mechanism arranged on the vertical support and located below the polishing tank body, the polishing tank body is rotationally connected to the vertical support, the polishing tank body is provided with a feeding port which is communicated with an inner cavity and used for putting in the polishing sand and the workpieces to be polished, and the polishing tank body is provided with a cover body at the position of the feeding port. The application has the effect of improving the problems of separation of polishing and screening processes and low efficiency.

Description

Technical Field

[0001] This application relates to the technical field of workpiece grinding equipment, and in particular to a workpiece fine grinding equipment. Background Technology

[0002] During the manufacturing process of fasteners such as nuts, the metal washers used with them inevitably develop irregular defects such as burrs and flash on their edges and surfaces after processes such as stamping and cutting. In order to ensure the flatness of the product, prevent scratches to users, and meet assembly requirements, the workpieces need to undergo fine grinding.

[0003] In related technologies, a vibratory grinder is usually used for processing. The workpiece, coarse grinding sand and fine grinding sand are put into the hopper of the vibratory grinder. The high-frequency vibration generated by the equipment causes the material to move in a vortex in the hopper, thereby realizing the grinding effect of the grinding sand on the surface of the workpiece.

[0004] Regarding the aforementioned technologies, vibration causes abrasives of varying coarseness to mix intensely with the workpiece. After grinding, the entire mixture needs to be unloaded and transferred to a separate screening device for separation. Vibration itself cannot effectively classify coarse and fine abrasives, increasing the uniformity of mixing and resulting in difficult and inefficient subsequent screening. Utility Model Content

[0005] To address the issues of separation and low efficiency in the grinding and screening processes, this application provides a workpiece fine grinding device.

[0006] The workpiece fine grinding equipment provided in this application adopts the following technical solution: A workpiece fine grinding device includes a vertical support, a grinding tank disposed on the vertical support for holding abrasive and workpiece to be ground, a drive mechanism for driving the grinding tank to rotate axially, and a screening mechanism disposed on the vertical support and located below the grinding tank. The grinding tank is rotatably connected to the vertical support, and the grinding tank has an inlet communicating with the inner cavity for placing abrasive and workpiece to be ground. The grinding tank has a cover at the inlet position.

[0007] By adopting the above technical solution, the vertically arranged grinding tank rotates axially under the drive mechanism. The workpiece and abrasive inside gently and evenly tumble and rub against each other, achieving a fine grinding effect and avoiding excessive impact on the workpiece surface that might occur with vibratory grinding. After grinding, the grinding tank is opened, and the mixture falls directly into the screening mechanism below under gravity, achieving a seamless connection. This eliminates the intermediate step of manually transferring the mixture to a separate screening device, as required in traditional processes, simplifying the operation process, saving operating time, and preventing material spillage and loss during transfer. The screening mechanism efficiently separates the workpiece, coarse abrasive, and fine abrasive, facilitating the separate collection and recycling of various materials, improving resource utilization and economy in the production process. The entire equipment has a compact and reasonable layout, a smooth and continuous process, improving production efficiency and automation, and reducing the labor intensity of operators.

[0008] Furthermore, the screening mechanism includes a screening disc mounted on the vertical support and located below the grinding tank for aligning with the feed inlet, a crank-slider assembly mounted on the vertical support for connecting the screening disc, and a screening drive motor for driving the crank-slider assembly to move the screening disc.

[0009] By adopting the above technical solution, the screening mechanism drives the crank-slider assembly via a screening drive motor, thereby causing the screening disc to produce a specific shaking motion, realizing the mechanization and automation of the screening process. The screening disc receives the mixed material falling from the discharge port of the grinding tank above. The shaking motion effectively promotes the uniform distribution and relative movement of materials on the surface of the screening disc, improving screening efficiency and thoroughness. Compared with the traditional method that requires manual transfer to a separate screening machine, the integrated setup simplifies the operation process, saves working time, reduces material scattering and loss during transfer, and makes the entire screening process continuous and efficient.

[0010] Furthermore, the crank-slider assembly includes a first connecting rod, a second connecting rod, a sliding rod, and a slider. The sliding rod is fixedly connected to the outer wall of the screening disc. The slider engages with and slides on the sliding rod and is arranged along the length of the sliding rod. The length of the first connecting rod is less than the length of the second connecting rod. One end of the first connecting rod is rotatably connected to the vertical support. One end of the second connecting rod is rotatably connected to the end of the first connecting rod that is away from the vertical support. The end of the second connecting rod that is away from the end connected to the first connecting rod is rotatably connected to the slider. The drive motor is mounted on the vertical support and cooperates with the first connecting rod.

[0011] By adopting the above technical solution, the crank-slider assembly uses a combination of a first connecting rod, a second connecting rod, a sliding rod, and a slider, and works in conjunction with the screening drive motor to convert the motor's rotational motion into the reciprocating motion of the screening disc along a specific trajectory. The sliding cooperation between the sliding rod and the slider ensures precise guidance of the motion direction, and the rotational connection between the multiple connecting rods provides flexible and stable power transmission. The resulting screening action effectively breaks the static accumulation state of the material, allowing sufficient relative motion between the workpiece and the grinding sand of different particle sizes, thereby achieving efficient separation through the screen.

[0012] Furthermore, the grinding tank is fixedly connected to a rotating shaft at both ends, the vertical support is provided with a bearing seat that cooperates with the rotating shaft, and the driving mechanism is located on one side of the vertical support and is used to cooperate with the rotating shaft.

[0013] By adopting the above technical solution, the grinding tank is supported in the bearing seats of the vertical bracket by the rotating shafts at both ends, forming a stable and reliable rotating support structure. The supports at both ends effectively bear the heavy load of the tank and the internal materials, ensuring the stability and concentricity of the tank during rotation, reducing eccentricity and shaking, and ensuring the uniformity of the workpiece and the grinding sand tumbling and friction in the tank, which is conducive to obtaining consistent grinding quality.

[0014] Furthermore, the drive mechanism includes a drive motor, a belt drive assembly, a reducer, and a bearing connecting sleeve. The reducer has an input shaft and an output shaft. The input shaft is used to connect to the belt drive assembly, and the output shaft is connected to the rotating shaft through the bearing connecting sleeve.

[0015] By adopting the above technical solution, the drive mechanism integrates a drive motor, belt drive assembly, reducer, and bearing connecting sleeve, forming a system with reasonable power matching and smooth transmission. The reducer converts the high-speed, low-torque output of the drive motor into the low-speed, high-torque output required for the grinding tank, meeting the grinding process requirements of the tank slowly rotating heavy materials. The belt drive assembly buffers vibration and provides overload protection, reducing the impact of motor start-up and operation shocks on the tank rotation, resulting in smoother operation and lower noise. The bearing connecting sleeve provides a reliable and easy-to-install shaft connection. The entire drive system ensures sufficient power, stable speed, and convenient maintenance during the grinding process.

[0016] Furthermore, the belt drive assembly includes a drive pulley for cooperating with the drive motor, a driven pulley for connecting to the input shaft of the reducer, a drive belt tensioned between the drive pulley and the driven pulley, and a housing. The drive pulley, the driven pulley, and the drive belt are all located within the housing. The housing has an input port into which the output shaft of the drive motor extends and cooperates with the drive pulley, and an output port into which the input shaft of the reducer extends and cooperates with the driven pulley.

[0017] By adopting the above technical solution, the belt drive assembly is encapsulated within a housing, forming an independent safety transmission module. The housing effectively isolates the high-speed rotating pulleys and drive belt from the external environment, improving the safety of equipment operation and preventing foreign objects from entering and affecting transmission or causing damage. The input and output ports ensure the sealing and alignment of power input and output.

[0018] Furthermore, one side of the cover is hinged to the grinding tank to cover the feed inlet, and the grinding tank is circumferentially arranged and fixedly connected with a sealing strip for cooperating with the edge of the cover at the feed inlet position.

[0019] By adopting the above technical solution, the cover is hinged to the grinding tank, making opening and closing simple and effortless. The circumferentially arranged sealing strip fits tightly with the edge of the cover, effectively sealing the feed inlet during tank rotation grinding, preventing fine grinding sand and dust from escaping from the interface. This reduces material loss, ensures a stable grinding media ratio, thereby guaranteeing grinding results and enhancing the equipment's applicability and reliability.

[0020] Furthermore, the grinding tank body is detachably connected with a locking pin for locking the cover, and the grinding tank body is symmetrically arranged on both sides of the feed port and vertically fixedly connected with positioning ears, and the positioning ears are provided with through holes for the locking pin to pass through.

[0021] By adopting the above technical solution, a simple, reliable, and easy-to-operate mechanical locking is achieved by using a locking pin inserted through the through hole of the positioning ear and pressing it against the outer wall of the cover with a central abutment pin. The symmetrical positioning ears ensure even distribution of locking force, preventing the cover from loosening or opening due to vibration or internal material impact during tank rotation, thus ensuring production safety. The detachable locking pin makes opening and closing operations convenient, requiring no complex tools, improving work efficiency. The locking structure is robust and durable, with low maintenance costs, and can effectively withstand wear and tear from long-term use.

[0022] Furthermore, the mesh size of the screening disc matches the outer diameter of the workpiece, and a first screen and a second screen are arranged at intervals along the height direction in the receiving groove.

[0023] By adopting the above technical solution, a multi-stage screening system is constructed by arranging a first screen and a second screen at intervals along the height direction within the receiving tank. Screens of different aperture sizes can be arranged in a progressively smaller aperture order from top to bottom, thereby achieving the grading of the mixed materials. The workpiece remains on the screening screens. The top first screen is used to separate large-diameter grinding sand particles, while the bottom second screen further screens the small-diameter grinding sand particles, filtering out debris. The grading screening allows workpieces, coarse sand, and fine sand to be automatically and efficiently sorted into different collection areas, facilitating the classification, recycling, and reuse of materials and reducing the workload of subsequent sorting.

[0024] In summary, this application includes at least one of the following beneficial technical effects: 1. The grinding tank and the screening mechanism located below are integrated into the same equipment frame, which seamlessly connects the two independent and separate processes in the traditional process. After grinding, the mixture can flow directly into the screening mechanism by gravity for automatic sorting, eliminating the manual transfer of materials between equipment, simplifying the operation process, shortening the operation cycle, reducing labor intensity, and effectively avoiding the scattering and loss of materials during the transfer process, thereby improving production efficiency. 2. The grinding tank body, through the cooperation of rotating shafts at both ends and bearing seats, forms a stable and reliable support structure, ensuring smooth rotation under heavy loads and making the workpiece grinding more uniform. The drive system, through a reducer and belt drive, provides low-speed, high-torque power matching the process requirements, and has the advantages of buffering, shock absorption, and smooth operation. The screening mechanism adopts a linkage and slider mechanism, which converts the rotational motion of the motor into efficient compound oscillation of the screening disc, resulting in more thorough screening. 3. The tank inlet uses a hinged cover and circumferential sealing strip to prevent dust and material leakage during grinding, ensuring a stable ratio of grinding media and maintaining a clean working environment. The cover is mechanically locked using a locking pin with a limit step and positioning ears, which is simple, quick, and provides uniform and reliable locking force, ensuring production safety. The belt drive assembly housing encloses high-speed moving parts, improving equipment safety. Together, these features enhance the equipment's ease of operation, safety, and long-term durability. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of a workpiece fine grinding equipment according to an embodiment of this application.

[0026] Figure 2 This is a schematic diagram of the overall structure of the grinding tank in the embodiment of this application when the cover is in the open state.

[0027] Figure 3 This is a partial structural schematic diagram of the belt drive assembly in an embodiment of this application.

[0028] Figure 4 This is a schematic diagram of the overall structure of the screening disc and crank-slider assembly in the embodiments of this application.

[0029] Figure 5 This is an exploded view of the structure of the receiving groove, the first screen and the second screen in the embodiments of this application.

[0030] Explanation of reference numerals in the attached drawings: 1. Vertical support; 11. Bearing seat; 2. Grinding tank body; 21. Feed inlet; 22. Cover; 23. Sealing strip; 24. Locking pin; 241. Handle; 25. Positioning ear; 251. Through hole; 26. Rotating shaft; 3. Drive mechanism; 31. Drive motor; 32. Belt drive assembly; 321. Driving pulley; 322. Driven pulley; 323. Drive belt; 324. Outer shell; 325. Input port; 326. Output port; 33. Reducer; 331. Input shaft; 332. Output shaft; 34. Bearing connecting sleeve; 4. Screening mechanism; 41. Screening disc; 42. Receiving groove; 43. Crank-slider assembly; 431. First connecting rod; 432. Second connecting rod; 433. Sliding rod; 434. Slider; 44. Screening drive motor; 45. First screen; 46. Second screen. Detailed Implementation

[0031] To make the purpose, technical solution, and advantages of this application clearer, the following description is provided in conjunction with the appendix. Figure 1-5 The present application will be further described in detail with reference to the embodiments.

[0032] This application discloses a workpiece fine grinding device. (Refer to...) Figure 1 and Figure 2 The workpiece fine grinding equipment includes a vertical support 1, a grinding tank 2, a drive mechanism 3, and a screening mechanism 4. The vertical support 1 is supported on the ground and provides space for other components. The grinding tank 2 is used to hold abrasive and workpieces to be ground. The drive mechanism 3 is used to drive the grinding tank 2 to rotate axially. The screening mechanism 4 is located below the grinding tank 2 and is used to screen the ground workpieces and abrasive.

[0033] The grinding tank 2 is rotatably connected to the vertical support 1. The grinding tank 2 has an inlet 21 that communicates with the inner cavity and is used to put in abrasive and workpiece to be ground. The grinding tank 2 is provided with a cover 22 at the position of the inlet 21. One side of the cover 22 is hinged to the grinding tank 2 to cover the inlet 21. A sealing strip 23 is circumferentially arranged and fixedly connected to the grinding tank 2 at the position of the inlet 21 to cooperate with the edge of the cover 22.

[0034] The grinding tank body 2 is detachably connected with a locking pin 24 for locking the cover body 22. The grinding tank body 2 is symmetrically arranged on both sides of the feed inlet 21 and vertically fixedly connected with positioning ears 25. The positioning ears 25 have through holes 251 for the locking pin 24 to pass through. The locking pin 24 is vertically fixedly connected to a handle 241 for easy installation at the middle position.

[0035] The grinding tank 2 has rotating shafts 26 fixedly connected to both ends. The vertical support 1 is provided with bearing seats 11 that cooperate with the rotating shafts 26. The drive mechanism 3 is located on one side of the vertical support 1 and is used to cooperate with the rotating shafts 26. The drive mechanism 3 includes a drive motor 31, a belt drive assembly 32, a reducer 33, and a bearing connecting sleeve 34. The reducer 33 has an input shaft 331 and an output shaft 332. The input shaft 331 is used to connect to the belt drive assembly 32, and the output shaft 332 is connected to the rotating shaft 26 through the bearing connecting sleeve 34.

[0036] Reference Figure 2 and Figure 3 The belt drive assembly 32 includes a drive pulley 321, a driven pulley 322, a drive belt 323, and a housing 324. The drive pulley 321 is used to cooperate with the drive motor 31, the driven pulley 322 is used to connect with the input shaft 331 of the reducer 33, and the drive belt 323 is tensioned between the drive pulley 321 and the driven pulley 322. The drive pulley 321, the driven pulley 322, and the drive belt 323 are all installed inside the housing 324. The housing 324 has an input port 325 through which the output shaft 332 of the drive motor 31 extends and cooperates with the drive pulley 321, and an output port 326 through which the input shaft 331 of the reducer 33 extends and cooperates with the driven pulley 322.

[0037] Reference Figure 4 and Figure 5 The screening mechanism 4 includes a screening disc 41, a receiving groove 42, a crank-slider assembly 43, and a screening drive motor 44. The screening disc 41 is mounted on the vertical support 1 and located below the grinding tank 2 for alignment with the feed inlet 21. The receiving groove 42 is located below the screening disc 41. The mesh size of the screening disc 41 matches the outer diameter of the workpiece. A first screen 45 and a second screen 46 are arranged at intervals along the height direction in the receiving groove 42.

[0038] A crank-slider assembly 43 is mounted on a vertical support 1 and used to connect to a screening disc 41. A screening drive motor 44 drives the crank-slider assembly 43 to cause the screening disc 41 to produce a specific shaking motion. The crank-slider assembly 43 includes a first connecting rod 431, a second connecting rod 432, a sliding rod 433, and a slider 434. The sliding rod 433 is fixedly connected to the outer wall of the screening disc 41. The slider 434 is engaged with and slides on the sliding rod 433 and is arranged along the length of the sliding rod 433. The length of the first connecting rod 431 is less than the length of the second connecting rod 432. One end of the first connecting rod 431 is rotatably connected to the vertical support 1. One end of the second connecting rod 432 is rotatably connected to the first connecting rod 431 away from the vertical support 1. The end of the second connecting rod 432 away from the first connecting rod 431 is rotatably connected to the slider 434. A drive motor 31 is mounted on the vertical support 1 and cooperates with the first connecting rod 431 to drive the first connecting rod 431 to rotate radially.

[0039] The implementation principle of the workpiece fine grinding equipment in this application embodiment is as follows: After the workpiece and grinding abrasive are fed into the grinding tank 2 through the feed port 21 and sealed, the drive mechanism 3 is started to rotate the tank axially. The workpiece and grinding abrasive, lifted along the tank wall, tumble and rub due to gravity as they fall, achieving gentle and uniform fine grinding. After grinding, the feed port 21 (which also serves as the discharge port) at the bottom of the tank is opened, and the mixed material falls into the screening disc 41 directly below under gravity, without any intermediate transfer. The tank is supported on bearing seats 11 by rotating shafts 26 at both ends, forming a stable center of rotation. The drive motor 31 transmits power to the tank through belt drive and reducer 33. The buffering characteristics of the belt drive and the speed regulation function of the reducer 33 together ensure that the tank can still operate at a suitable and stable speed under heavy load.

[0040] The screening drive motor 44 drives a linkage mechanism consisting of a first connecting rod 431, a second connecting rod 432, a sliding rod 433, and a slider 434. The motor's rotational motion is converted into precise reciprocating motion of the slider 434 on the sliding rod 433, which in turn drives the screening disc 41 to produce a complex shaking motion with a specific trajectory. This shaking effectively disperses the material, allowing it to move fully on the screen surface. Abrasive particles smaller than the screen aperture can quickly pass through the screen, while the workpiece remains on the screen disc, achieving efficient separation.

[0041] The receiving groove 42 below the screening disc 41 is equipped with a first screen 45 and a second screen 46 with different aperture sizes, forming a multi-stage screening system. The mixed sand particles passing through the filter disc first fall onto the first screen 45, where coarse sand is retained, while fine sand and debris continue to fall onto the second screen 46 for secondary separation. Finally, the workpiece, coarse grinding sand, and fine grinding sand are collected in different locations, facilitating the recycling of materials.

[0042] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A workpiece fine grinding equipment, characterized in that: The device includes a vertical support (1), a grinding tank (2) disposed on the vertical support (1) for holding abrasive and workpieces to be ground, a drive mechanism (3) for driving the grinding tank (2) to rotate axially, and a screening mechanism (4) disposed on the vertical support (1) and located below the grinding tank (2). The grinding tank (2) is rotatably connected to the vertical support (1). The grinding tank (2) has an inlet (21) that communicates with the inner cavity and is used to put in abrasive and workpieces to be ground. The grinding tank (2) has a cover (22) at the inlet (21). The screening mechanism (4) includes a screening disc (41) installed on the vertical support (1) and located below the grinding tank (2) for aligning with the feed inlet (21), a receiving groove (42) provided below the screening disc (41), a crank-slider assembly (43) provided on the vertical support (1) for connecting the screening disc (41), and a screening drive motor (44) for driving the crank-slider assembly (43) to drive the screening disc (41) to move. The mesh size of the screening disc (41) matches the outer diameter of the workpiece, and the receiving groove (42) is provided with a first screen (45) and a second screen (46) arranged at intervals along the height direction.

2. The workpiece fine grinding equipment according to claim 1, characterized in that: The crank-slider assembly (43) includes a first connecting rod (431), a second connecting rod (432), a sliding rod (433), and a slider (434). The sliding rod (433) is fixedly connected to the outer wall of the screening disc (41). The slider (434) engages with and slides on the sliding rod (433) and is arranged along the length of the sliding rod (433). The length of the first connecting rod (431) is less than the length of the second connecting rod (432). One end of the first connecting rod (431) is rotatably connected to the vertical support (1). One end of the second connecting rod (432) is rotatably connected to the end of the first connecting rod (431) that is away from the vertical support (1). The end of the second connecting rod (432) that is away from the end connected to the first connecting rod (431) is rotatably connected to the slider (434). The drive motor (31) is mounted on the vertical support (1) and cooperates with the first connecting rod (431).

3. The workpiece fine grinding equipment according to claim 1, characterized in that: The grinding tank (2) is fixedly connected to a rotating shaft (26) at both ends. The vertical support (1) is provided with a bearing seat (11) that cooperates with the rotating shaft (26). The driving mechanism (3) is located on one side of the vertical support (1) and is used to cooperate with the rotating shaft (26).

4. The workpiece fine grinding equipment according to claim 3, characterized in that: The drive mechanism (3) includes a drive motor (31), a belt drive assembly (32), a reducer (33), and a bearing connecting sleeve (34). The reducer (33) has an input shaft (331) and an output shaft (332). The input shaft (331) is used to connect with the belt drive assembly (32), and the output shaft (332) is connected with the rotating shaft (26) through the bearing connecting sleeve (34).

5. The workpiece fine grinding equipment according to claim 4, characterized in that: The belt drive assembly (32) includes a drive pulley (321) for cooperating with the drive motor (31), a driven pulley (322) for connecting with the input shaft (331) of the reducer (33), a drive belt (323) tensioned between the drive pulley (321) and the driven pulley (322), and a housing (324). The drive pulley (321), the driven pulley (322), and the drive belt (323) are all located inside the housing (324). The housing (324) has an input port (325) into which the output shaft (332) of the drive motor (31) extends and cooperates with the drive pulley (321), and an output port (326) into which the input shaft (331) of the reducer (33) extends and cooperates with the driven pulley (322).

6. The workpiece fine grinding equipment according to claim 1, characterized in that: The cover (22) is hinged to the grinding tank (2) on one side to cover the feed inlet (21). The grinding tank (2) is circumferentially arranged and fixedly connected with a sealing strip (23) for cooperating with the edge of the cover (22) at the feed inlet (21).

7. The workpiece fine grinding equipment according to claim 6, characterized in that: The grinding tank (2) is detachably connected to a locking pin (24) for locking the cover (22). The grinding tank (2) is symmetrically arranged on both sides of the feed inlet (21) and vertically fixedly connected to a positioning ear (25). The positioning ear (25) has a through hole (251) for the locking pin (24) to pass through.

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