Automatic polishing machine for precise hardware parts

Abstract

The automatic polishing machine comprises a magnetic polishing machine body and a discharging device, the magnetic polishing machine body comprises a machine body, a containing table is fixedly installed on the machine body, the discharging device comprises a support, and the support is fixedly installed on the containing table; and a driving motor is fixedly mounted on one outer side surface of the bracket. By arranging the discharging device and the solid-liquid separation device, a workpiece, a steel needle and a polishing solution in the polishing barrel can be poured into the solid-liquid separation device together after polishing is completed, automatic discharging is completed, and after the workpiece, the steel needle and the polishing solution are poured into the solid-liquid separation device together, the workpiece, the steel needle and the polishing solution are blocked by a plurality of first pressing balls at the position of the upper barrel body; and the workpiece is left on the first pressing ball in the upper barrel, the steel needle and the polishing solution enter the mounting shell through the upper barrel, and the workpiece is automatically separated and conveniently taken out.

Description

Technical Field

[0001] The invention relates to the technical field of parts polishing, in particular to an automatic polishing machine for precision hardware parts. Background Art

[0002] The polishing process of hardware parts is a crucial part of the precision manufacturing process. It mainly improves the surface finish and precision of parts by removing burrs and other defects on the surface of parts. At present, magnetic polishing machines are usually used to polish some small precision hardware parts.

[0003] The existing magnetic polishing machine used for polishing precision hardware parts has the disadvantage that the hardware parts cannot be automatically discharged after polishing is completed. The staff needs to manually pour out the polishing liquid, steel needles and workpieces in the polishing barrel, and then select the workpieces from a large number of steel needles. The selection process is time-consuming and laborious, and it is easy for the hands to be accidentally scratched during the selection process, which poses a safety risk of tetanus infection. Even if gloves are worn, the surface of the workpiece will be too slippery and inconvenient to operate due to the polishing liquid on the surface. Summary of the invention

[0004] The purpose of the present invention is to solve the defect in the prior art that the hardware parts cannot be automatically discharged after polishing is completed, and to propose an automatic polishing machine for precision hardware parts.

[0005] The present invention adopts the following technical solutions: An automatic polishing machine for precision hardware parts comprises a magnetic polishing machine body and a discharging device, wherein the magnetic polishing machine body comprises a machine body, a placing table is fixedly mounted on the machine body, the discharging device comprises a bracket, the bracket is fixedly mounted on the placing table, a driving motor is fixedly mounted on an outer surface of the bracket, a driving shaft penetrating the bracket is fixedly connected to the output end of the driving motor, the driving shaft is rotatably connected to the bracket, two fixing rods are symmetrically fixedly connected to the driving shaft, a polishing barrel is fixedly connected between the two fixing rods, and a solid-liquid separation device is mounted on the placing table.

[0006] Preferably, the solid-liquid separation device includes an upper cylinder, a mounting shell, a lower cylinder and a support, and the upper cylinder, the mounting shell, the lower cylinder and the support are fixedly connected together in sequence from top to bottom, and the support is fixedly connected to the placement table, and a first screening assembly is installed in the upper cylinder, and the first screening assembly includes a mounting frame fixedly installed on the inner surface of the upper cylinder, and the mounting frame is provided with a plurality of equally spaced slide grooves, and a first sliding rod is slidably connected in the plurality of slide grooves, and a bottom plate is fixedly connected to the bottom end of the first sliding rod, a return spring is fixedly connected between the bottom plate and the bottom surface of the mounting frame, and a first holding ball is fixedly installed on the top of the first sliding rod.

[0007] Preferably, a second screening assembly is installed in the installation shell, the second screening assembly includes a filter screen, a slot connecting the upper cylinder and the lower cylinder is opened in the installation shell, and the filter screen is slidably connected in the slot.

[0008] Preferably, a reflux assembly is installed between the polishing barrel and the lower cylinder, and the reflux assembly includes a first conduit and a reflux pipe, the first conduit is fixedly connected to the inner surface of the polishing barrel, and the reflux pipe is fixedly connected to the bottom surface of the lower cylinder, the first conduit and the reflux pipe are connected together by a metal hose, and an automatic valve for preventing backflow is installed on one end of the first conduit located in the polishing barrel.

[0009] Preferably, the automatic valve includes a valve body, which is fixedly connected to one end of the first conduit located in the polishing barrel, a cavity connected to the first conduit is opened in the valve body, a reflux hole connected to the cavity is opened on the bottom surface of the valve body, a piston plate is slidably connected to an inner surface of the cavity, a sealing tube is fixedly connected to the side surface of the piston plate close to the first conduit, the sealing tube is slidably connected in the first conduit, a connecting groove is opened on the sealing tube, and a first spring is fixedly connected between the bottom surface of the piston plate and an inner surface of the cavity.

[0010] Preferably, a steel needle separation device is installed on the solid-liquid separation device, and the steel needle separation device includes a first top cover, the first top cover is located directly above the upper cylinder, the first top cover is slidably connected to the second top cover, the second top cover is provided with an empty groove, and the bottom side surface of the second top cover is provided with multiple mounting holes connected to the empty groove, the multiple mounting holes are all slidably connected to the first sliding rod, the second pressure holding ball is fixedly installed on the bottom end of the first sliding rod, the first sliding rod is fixedly connected between one end of the first sliding rod located in the empty groove and an inner side surface of the empty groove, the second buffer spring is fixedly connected between the first top cover and the second top cover, the first top cover is fixedly connected to a micro-vibration motor, the placement table is fixedly connected to a fixing frame, the fixing frame is respectively provided with a first mounting plate and a second mounting plate, the first mounting plate is provided with a threaded groove, the threaded groove is threadedly connected with a threaded rod, and the bottom end of the threaded rod is fixedly connected to the second top cover.

[0011] Preferably, an automatic lifting assembly is installed on the fixed frame, and the automatic lifting assembly includes a first transmission wheel fixedly installed on the driving shaft, a side wall of the fixed frame is rotatably connected to the first transmission shaft, one end of the first transmission shaft is fixedly connected to the second transmission wheel, the first transmission wheel and the second transmission wheel are connected through a transmission belt transmission, the first transmission shaft is fixedly connected to an end away from the second transmission wheel, the first mounting plate is rotatably connected to the second transmission shaft, the bottom end of the second transmission shaft is fixedly connected to a worm gear meshed with the worm gear, the second transmission shaft is fixedly connected to a first limiting member that is rotatably connected to the second mounting plate, the first limiting member is fixedly connected to the first gear, the second mounting plate is rotatably connected to the second limiting member, the second limiting member is fixedly connected to the second gear meshed with the first gear, the bottom end of the second limiting member is fixedly connected to a square limiting rod, a limiting groove matching the square limiting rod is opened in the threaded rod, and the square limiting rod is slidably connected in the limiting groove.

[0012] The beneficial effects of the present invention are: By arranging a discharging device and a solid-liquid separation device, after polishing is completed, the workpiece, the steel needle and the polishing liquid in the polishing barrel can be poured into the solid-liquid separation device together to complete automatic discharging. After the workpiece, the steel needle and the polishing liquid are poured into the solid-liquid separation device together, at the upper cylinder, the workpiece is blocked by a plurality of first holding balls, and the workpiece is left on the first holding balls in the upper cylinder, while the steel needle and the polishing liquid enter the mounting shell through the upper cylinder, and the workpiece is automatically separated, which is convenient for taking out; After the polishing barrel is reset, the height of the polishing liquid in the lower cylinder is higher than the bottom of the polishing barrel. Based on this height difference, the siphon principle can be used to use the return line composed of the first conduit, the return pipe and the metal hose as a siphon line, and the automatic valve can be used to realize the automatic return of the polishing liquid from the lower cylinder to the polishing barrel for use in the subsequent polishing process. With the help of the automatic lifting component, the forward and reverse rotation of the driving motor can drive the square limit rod to realize forward and reverse rotation, thereby being able to drive the threaded rod to automatically rise and fall with the help of the limiting effect of the sliding connection between the square limit rod and the limit groove and the limiting effect of the threaded connection between the threaded rod and the thread groove. When the threaded rod moves downward to cover the second top cover and the first top cover on the upper cylinder, and the first holding ball and the second holding ball hold the workpiece in the middle, the first top cover can be directly driven by the micro-vibration motor to vibrate up and down in the upper cylinder, and the vibration directly acts on the workpiece, driving the workpiece to vibrate up and down rapidly in the upper cylinder, thereby realizing the vibration screening and separation of the steel needle with the help of the vibration effect and the first screening component in the upper cylinder, so that the present invention can still realize automatic discharging and rapid separation of hardware parts made of magnetic metal materials after polishing. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1A schematic diagram of the structure of an automatic polishing machine for precision hardware parts proposed by the present invention; Figure 2 A schematic structural diagram of a magnetic polishing machine body of an automatic polishing machine for precision hardware parts proposed by the present invention; Figure 3 This is a schematic structural diagram of a discharging device of an automatic polishing machine for precision hardware parts proposed by the present invention; Figure 4 This is a structural schematic diagram of a solid-liquid separation device of an automatic polishing machine for precision hardware parts proposed by the present invention; Figure 5 A schematic diagram of the structure of a filter screen of an automatic polishing machine for precision hardware parts proposed by the present invention; Figure 6 A cross-sectional view of the internal structure of a solid-liquid separation device of an automatic polishing machine for precision hardware parts proposed by the present invention; Figure 7 This is a structural schematic diagram of a steel needle separation device of an automatic polishing machine for precision hardware parts proposed by the present invention; Figure 8 A cross-sectional view of the internal structure of a steel needle separation device of an automatic polishing machine for precision hardware parts proposed by the present invention; Fig. 9 A schematic diagram of the structure of a first top cover and a second top cover of an automatic polishing machine for precision hardware parts proposed by the present invention; Fig.10 A cross-sectional view of the internal structure of an automatic polishing machine for precision hardware parts proposed by the present invention; Fig.11 for Fig.10 A magnified view of the structure in the middle; Fig.12 The present invention is a schematic structural diagram of a piston plate of an automatic polishing machine for precision hardware parts.

[0014] In the figure: 1 magnetic polishing machine body, 11 machine body, 12 placing table, 2 discharging device, 21 bracket, 22 driving motor, 23 driving shaft, 231 first transmission wheel, 232 transmission belt, 24 fixing rod, 25 polishing barrel, 251 first conduit, 252 valve body, 2521 cavity, 2522 reflux hole, 253 piston plate, 2531 blocking pipe, 2532 connecting groove, 2533 first spring, 3 solid-liquid separation device, 31 upper cylinder, 311 mounting frame, 312 slide groove, 313 first slide rod, 314 bottom plate, 315 first pressure holding ball, 32 mounting shell, 321 filter screen, 33 lower Cylinder, 331 reflux pipe, 34 pillar, 4 steel needle separation device, 41 first top cover, 42 second top cover, 421 empty slot, 422 first slide bar, 423 second pressure holding ball, 424 first buffer spring, 43 second buffer spring, 44 micro vibration motor, 45 fixing frame, 451 first mounting plate, 452 second mounting plate, 46 first transmission shaft, 461 second transmission wheel, 462 worm, 47 second transmission shaft, 471 worm wheel, 472 first limit piece, 473 first gear, 48 second limit piece, 481 second gear, 482 square limit rod, 49 threaded rod, 491 limit groove. DETAILED DESCRIPTION

[0015] See also Figure 1-Figure 12 , an automatic polishing machine for precision hardware parts, including a magnetic polishing machine body 1 and a discharging device 2, the magnetic polishing machine body 1 includes a body 11, a placing table 12 is fixedly installed on the body 11, the discharging device 2 includes a bracket 21, the bracket 21 is fixedly installed on the placing table 12, a driving motor 22 is fixedly installed on an outer surface of the bracket 21, a driving shaft 23 that passes through the bracket 21 is fixedly connected to the output end of the driving motor 22, the driving shaft 23 is rotatably connected to the bracket 21, two fixed rods 24 are symmetrically fixedly connected to the driving shaft 23, a polishing barrel 25 is fixedly connected between the two fixed rods 24, and a solid-liquid separation device 3 is installed on the placing table 12.

[0016] like Figure 4 , Figure 5 and Figure 6As shown, the solid-liquid separation device 3 includes an upper cylinder 31, a mounting shell 32, a lower cylinder 33 and a support 34. The upper cylinder 31, the mounting shell 32, the lower cylinder 33 and the support 34 are fixedly connected together in sequence from top to bottom. The support 34 is fixedly connected to the placement table 12. A first screening assembly is installed in the upper cylinder 31. The first screening assembly includes a mounting frame 311 fixedly installed on the inner surface of the upper cylinder 31. The mounting frame 311 is provided with a plurality of equally spaced slide grooves 312. First slide bars 313 are slidably connected in the plurality of slide grooves 312. A bottom plate 314 is fixedly connected to the bottom end of the first slide bar 313. A return spring is fixedly connected between the bottom plate 314 and the bottom surface of the mounting frame 311. A first holding ball 315 is fixedly installed on the top of the first slide bar 313.

[0017] The existing magnetic polishing machine used for polishing precision hardware parts has the disadvantage that the hardware parts cannot be automatically discharged after polishing is completed. The staff needs to manually pour out the polishing liquid, steel needles and workpieces in the polishing barrel, and then select the workpieces from a large number of steel needles. The selection process is time-consuming and laborious, and it is easy for the hands to be accidentally scratched during the selection process, which poses a safety risk of tetanus infection. Even if gloves are worn, the surface of the workpiece will be too slippery and inconvenient to operate due to the polishing liquid on the surface. In order to solve the above problems, the present invention is provided with a discharging device 2 and a solid-liquid separation device 3. When the workpiece is polished in the polishing barrel 25, the driving motor 22 is started and controlled to slowly rotate forward 135°. During this process, the output end of the driving motor 22 drives the driving shaft 23 to rotate, and the driving shaft 23 drives the polishing barrel 25 to rotate around the driving shaft 23 through the fixed rod 24 until the polishing barrel 25 rotates 135° and becomes an inclined posture with the opening inclined downward. During the rotation process, the workpiece and the steel needle in the polishing barrel 25 are poured into the solid-liquid separation device 3 together with the polishing liquid to complete automatic discharging. After the workpiece, the steel needle and the polishing liquid are poured into the solid-liquid separation device 3 together, at the upper cylinder 31, it is blocked by multiple first holding balls 315, and the workpiece is left on the first holding ball 315 in the upper cylinder 31, and the steel needle and the polishing liquid enter the mounting shell 32 through the upper cylinder 31, automatically separating the workpiece for easy removal.

[0018] like Figure 6 As shown, a second screening assembly is installed in the mounting shell 32, and the second screening assembly includes a filter screen 321. A slot connecting the upper cylinder 31 and the lower cylinder 33 is opened in the mounting shell 32, and the filter screen 321 is slidably connected in the slot.

[0019] At the mounting shell 32, after being filtered by the filter screen 321, the polishing liquid falls into the lower cylinder 33, and the steel needles are left on the filter screen 321. Since the filter screen 321 can be easily pulled out from the mounting shell 32, the steel needles can be easily separated and recovered.

[0020] like Figure 3 and Figure 6 As shown, a reflux assembly is installed between the polishing barrel 25 and the lower cylinder 33, and the reflux assembly includes a first conduit 251 and a reflux pipe 331. The first conduit 251 is fixedly connected to the inner surface of the polishing barrel 25, and the reflux pipe 331 is fixedly connected to the bottom surface of the lower cylinder 33. The first conduit 251 and the reflux pipe 331 are connected together by a metal hose, and an automatic valve for preventing backflow is installed on one end of the first conduit 251 located in the polishing barrel 25.

[0021] At the lower cylinder 33, the filtered polishing liquid is collected here. Since the polishing barrel 25 and the lower cylinder 33 are connected through the first conduit 251, the reflux pipe 331 and the metal hose, after the workpiece, the steel needle and the polishing liquid in the polishing barrel 25 are all poured out, the drive motor 22 is controlled to rotate 135° in the opposite direction to reset. After the polishing barrel 25 is reset, the height of the polishing liquid in the lower cylinder 33 is higher than the bottom of the polishing barrel 25. Based on this height difference, the siphon principle can be used to utilize the reflux pipeline composed of the first conduit 251, the reflux pipe 331 and the metal hose as a siphon pipeline to realize the reflux of the polishing liquid from the lower cylinder 33 to the polishing barrel 25 for use in subsequent polishing processes.

[0022] like Fig.10 and Fig.11 As shown, the automatic valve includes a valve body 252, which is fixedly connected to one end of the first conduit 251 located in the polishing barrel 25, a cavity 2521 connected to the first conduit 251 is opened in the valve body 252, a reflux hole 2522 connected to the cavity 2521 is opened on the bottom side surface of the valve body 252, a piston plate 253 is slidably connected to an inner side surface of the cavity 2521, a blocking tube 2531 is fixedly connected to the side surface of the piston plate 253 close to the first conduit 251, the blocking tube 2531 is slidably connected in the first conduit 251, a connecting groove 2532 is opened on the blocking tube 2531, and a first spring 2533 is fixedly connected between the bottom side surface of the piston plate 253 and an inner side surface of the cavity 2521.

[0023] In order to keep polishing liquid in the first conduit 251 at all times so that each time the polishing barrel 25 is reset, automatic siphoning can be achieved with the help of the polishing liquid retained in the first conduit 251 as a guide, the present invention is provided with an automatic valve. First of all, it should be understood that because the magnetic polishing machine body 1 is a magnetic polishing machine, there is a magnetic field near the placement table 12. On this basis, when the driving motor 22 drives the polishing barrel 25 to rotate forward around the driving shaft 23 to dump the workpiece, steel needle and polishing liquid into the solid-liquid separation device 3, the piston plate 253 moves away from the placement table 12 as the polishing barrel 25 rotates, and the magnetic force of the magnetic field exerted on the piston plate 253 is weakened. Under the elastic force of the first spring 2533, the blocking tube 2531 moves into the first conduit 251 until the piston plate 253 is tightly attached to an inner surface of the valve body 252 close to the first conduit 251. At this time, the connection between the first conduit 251 and the valve body 252 is blocked by the blocking tube. The partition 2531 is blocked, so even if all the polishing liquid in the polishing barrel 25 is poured out, some polishing liquid will still remain in the first conduit 251. After the pouring is completed, when the driving motor 22 drives the polishing barrel 25 to rotate in the opposite direction around the driving shaft 23 during the reset process, the piston plate 253 approaches the placement table 12 as the polishing barrel 25 rotates, and the magnetic force on the piston plate 253 is enhanced. Under the action of the magnetic force, the piston plate 253 overcomes the elastic force of the first spring 2533 and moves away from the first conduit 251. The blocking tube 2531 extends out from the first conduit 251, and the valve body 252 is connected to the first conduit 251 through the connecting groove 2532. The polishing liquid retained in the first conduit 251 flows into the polishing barrel 25 under the action of the pressure difference caused by the height difference between the bottom height of the polishing barrel 25 and the height of the polishing liquid in the lower cylinder 33, and realizes automatic siphoning, so that the polishing liquid in the lower cylinder 33 automatically flows into the polishing barrel 25.

[0024] like Figure 7 , Figure 8 and Fig. 9As shown, a steel needle separation device 4 is installed on the solid-liquid separation device 3, and the steel needle separation device 4 includes a first top cover 41, the first top cover 41 is located directly above the upper cylinder 31, a second top cover 42 is slidably connected in the first top cover 41, a hollow groove 421 is opened in the second top cover 42, a plurality of mounting holes connected to the hollow groove 421 are opened on the bottom side surface of the second top cover 42, a first slide bar 422 is slidably connected in the plurality of mounting holes, a second pressure holding ball 423 is fixedly installed on the bottom end of the first slide bar 422, and the first slide bar 422 is located in the hollow groove 421. A first buffer spring 424 is fixedly connected between an inner end and an inner surface of the empty groove 421, a second buffer spring 43 is fixedly connected between the first top cover 41 and the second top cover 42, a micro vibration motor 44 is fixedly connected to the first top cover 41, a fixing frame 45 is fixedly connected to the placement table 12, a first mounting plate 451 and a second mounting plate 452 are respectively mounted on the fixing frame 45, a threaded groove is opened on the first mounting plate 451, a threaded rod 49 is threadedly connected in the threaded groove, and the bottom end of the threaded rod 49 is fixedly connected to the second top cover 42.

[0025] For hardware parts made of magnetic metal, since the steel needles used for polishing are also magnetic, when such hardware parts are automatically discharged and separated after polishing, the steel needles will be adsorbed on the surface of the workpiece under the action of magnetic force, thereby increasing the difficulty of separation. It is difficult to separate the workpiece and the steel needles only by gravity. For this reason, the present invention provides a steel needle separation device 4. After the workpiece, steel needles and polishing liquid in the polishing barrel 25 are poured into the upper cylinder 31, the workpiece and part of the steel needles are left on the first holding ball 315 due to the magnetic force between the workpiece and the steel needles. At this time, the threaded rod 49 is rotated forward, and the threaded connection relationship between the threaded rod 49 and the threaded groove on the first mounting plate 451 is used to drive the thread The rod 49 moves downward, and the threaded rod 49 drives the second top cover 42 and the first top cover 41 to move downward, and the second top cover 42 and the first top cover 41 are covered on the upper cylinder 31. The first holding ball 315 and the second holding ball 423 hold the workpiece in the middle, and then the micro vibration motor 44 is started. The micro vibration motor 44 directly drives the first top cover 41 to vibrate up and down in the upper cylinder 31. The vibration directly acts on the workpiece, driving the workpiece to vibrate up and down quickly in the upper cylinder 31, thereby using the vibration effect to cooperate with the first screening component in the upper cylinder 31 to achieve vibration screening and separation of the steel needles, so that the present invention can still achieve automatic discharging and rapid separation after polishing for hardware parts made of magnetic metal materials.

[0026] like Figure 7 , Figure 8 and Fig. 9As shown, an automatic lifting component is installed on the fixing frame 45, and the automatic lifting component includes a first transmission wheel 231 fixedly installed on the driving shaft 23, a first transmission shaft 46 is rotatably connected to a side wall of the fixing frame 45, a second transmission wheel 461 is fixedly connected to one end of the first transmission shaft 46, the first transmission wheel 231 and the second transmission wheel 461 are connected to each other through a transmission belt 232, a worm 462 is fixedly connected to one end of the first transmission shaft 46 away from the second transmission wheel 461, a second transmission shaft 47 is rotatably connected in the first mounting plate 451, and a second transmission shaft 47 is fixedly connected to the bottom end of the second transmission shaft 47. The second transmission shaft 47 is fixedly connected with a first stopper 472 which is rotationally connected to the second mounting plate 452, and a first gear 473 is fixedly connected to the first stopper 472. The second mounting plate 452 is internally connected with a second stopper 48 which is rotationally connected to the second mounting plate 452, and a second gear 481 which is meshingly connected to the first gear 473 is fixedly connected to the second stopper 48. A square stopper rod 482 is fixedly connected to the bottom end of the second stopper 48, and a stopper groove 491 matching the square stopper rod 482 is formed in the threaded rod 49, and the square stopper rod 482 is slidably connected in the stopper groove 491.

[0027] In order to further simplify the operation and eliminate the operation of manually rotating the threaded rod 49, thereby improving the overall automation level of the present invention, the present invention is provided with an automatic lifting component. With the help of the automatic lifting component, the driving motor 22 can be used to drive the polishing barrel 25 to rotate during the normal rotation of the driving shaft 23, thereby driving the first transmission wheel 231 to rotate. The first transmission wheel 231 drives the second transmission wheel 461 to rotate through the transmission belt 232. The second transmission wheel 461 drives the worm 462 to rotate through the first transmission shaft 46. The worm 462 drives the worm wheel 471 to rotate through the meshing connection. The worm wheel 471 drives the first limit piece 472 and the first gear 473 to rotate through the second transmission shaft 47. The first gear 473 drives the second gear 481 to rotate through the meshing connection. The second gear 481 drives the second gear 481 through the meshing connection. The second limit member 48 drives the square limit rod 482 to rotate, and the forward and reverse rotation of the driving motor 22 can drive the square limit rod 482 to realize forward and reverse rotation, so that the threaded rod 49 can be driven to automatically rise and fall with the help of the limiting effect of the sliding connection between the square limit rod 482 and the limit groove 491 and the limiting effect of the threaded connection between the threaded rod 49 and the threaded groove, so as to realize the automatic rise of the threaded rod 49 during the automatic discharging process of the polishing barrel 25, thereby driving the first top cover 41 and the second top cover 42 to move up and separate from the upper cylinder 31. After the automatic discharging is completed, the threaded rod 49 is driven to automatically move down during the resetting process of the polishing barrel 25, so that the first top cover 41 and the second top cover 42 move down and enter the upper cylinder 31, and then the micro vibration motor 44 is started to realize the vibration screening and separation of the workpiece and the steel needle.

[0028] In the present invention, after the workpiece is polished in the polishing barrel 25, the drive motor 22 is started and controlled to slowly rotate forward 135°. During this process, the output end of the drive motor 22 drives the drive shaft 23 to rotate, and the drive shaft 23 drives the polishing barrel 25 to rotate around the drive shaft 23 through the fixed rod 24 until the polishing barrel 25 rotates 135° to become an inclined posture with the opening inclined downward. During the rotation process, the workpiece, the steel needle and the polishing liquid in the polishing barrel 25 are poured into the solid-liquid separation device 3 together, and the automatic discharge is completed; After the workpiece, the steel needle and the polishing liquid are poured into the solid-liquid separation device 3 together, at the upper cylinder 31, the workpiece is blocked by the multiple first holding balls 315, and is retained on the first holding balls 315 in the upper cylinder 31. The steel needle and the polishing liquid enter the mounting shell 32 through the upper cylinder 31, and the workpiece is automatically separated for easy removal. At the mounting shell 32, after being filtered by the filter screen 321, the polishing liquid falls into the lower cylinder 33, and the steel needle is retained on the filter screen 321. At the lower cylinder 33, the filtered polishing liquid is collected here. With the help of the automatic valve, when the polishing barrel 25 rotates forward around the driving shaft 23 to dump the workpiece, the steel needle and the polishing liquid into the solid-liquid separation device 3, the piston plate 253 moves away from the placement table 12 as the polishing barrel 25 rotates. The magnetic force of the magnetic field on the piston plate 253 is weakened. Under the elastic force of the first spring 2533, the blocking tube 2531 moves into the first conduit 251 until the piston plate 253 is tightly attached to the valve. The valve body 252 is on an inner surface close to the first conduit 251. At this time, the communication between the first conduit 251 and the valve body 252 is blocked by the blocking tube 2531. After the dumping is completed, when the driving motor 22 drives the polishing barrel 25 to rotate in the opposite direction around the driving shaft 23 during the reset process, the piston plate 253 approaches the placement table 12 as the polishing barrel 25 rotates, and the magnetic force on the piston plate 253 is enhanced. Under the action of the magnetic force, the piston plate 253 overcomes the elastic force of the first spring 2533 and moves away from the first conduit 251. The blocking tube 2531 extends out of the first conduit 251, and the valve body 252 is connected to the first conduit 251 through the connecting groove 2532. The polishing liquid retained in the first conduit 251 flows into the polishing barrel 25 under the pressure difference caused by the height difference between the bottom height of the polishing barrel 25 and the height of the polishing liquid in the lower cylinder 33, and realizes automatic siphoning, so that the polishing liquid in the lower cylinder 33 automatically flows into the polishing barrel 25. For hardware parts made of magnetic metal, after the workpiece, steel needle and polishing liquid in the polishing barrel 25 are poured into the upper cylinder 31, the workpiece and part of the steel needle are left on the first holding ball 315 due to the magnetic force between the workpiece and the steel needle. At this time, the threaded rod 49 is rotated forward, and the threaded rod 49 is driven downward by the threaded connection relationship between the threaded rod 49 and the threaded groove on the first mounting plate 451. The threaded rod 49 drives the second top cover 42 and the first top cover 41 to move downward, and the second top cover 42 and the first top cover 41 are covered on the upper cylinder 31. On the upper cylinder 31, the first holding ball 315 and the second holding ball 423 hold the workpiece in the middle, and then the micro-vibration motor 44 is started, and the micro-vibration motor 44 directly drives the first top cover 41 to vibrate up and down in the upper cylinder 31, and the vibration directly acts on the workpiece, driving the workpiece to vibrate up and down quickly in the upper cylinder 31, thereby using the vibration effect to cooperate with the first screening component in the upper cylinder 31 to achieve vibration screening and separation of the steel needles, so that the present invention can still achieve automatic discharge and rapid separation after polishing for hardware parts made of magnetic metal materials; With the help of the automatic lifting component, the driving motor 22 is used to drive the polishing barrel 25 to rotate during the normal rotation of the driving shaft 23, which drives the first transmission wheel 231 to rotate. The first transmission wheel 231 drives the second transmission wheel 461 to rotate through the transmission belt 232. The second transmission wheel 461 drives the worm 462 to rotate through the first transmission shaft 46. The worm 462 drives the worm wheel 471 to rotate through the meshing connection. The worm wheel 471 drives the first limiting member 472 and the first gear 473 to rotate through the second transmission shaft 47. The first gear 473 drives the second gear 481 to rotate through the meshing connection. The second gear 481 drives the square limiting rod 482 to rotate through the second limiting member 48. The normal rotation of the driving motor 22 Reversal can drive the square limit rod 482 to achieve forward and reverse rotation, so that the threaded rod 49 can be driven to automatically rise and fall with the help of the limiting effect of the sliding connection between the square limit rod 482 and the limit groove 491 and the limiting effect of the threaded connection between the threaded rod 49 and the threaded groove, thereby realizing that during the automatic discharging process of the polishing barrel 25, the threaded rod 49 is driven to automatically rise, thereby driving the first top cover 41 and the second top cover 42 to move up and separate from the upper cylinder 31. After the automatic discharging is completed, the threaded rod 49 is driven to automatically move down during the resetting process of the polishing barrel 25, so that the first top cover 41 and the second top cover 42 move down and enter the upper cylinder 31, and then the micro vibration motor 44 is started to realize the vibration screening and separation of the workpiece and the steel needle.

Claims

1. An automatic polishing machine for precision hardware parts, comprising a magnetic polishing machine body (1) and a discharging device (2), characterized in that: The magnetic polishing machine body (1) comprises a machine body (11), a placing table (12) is fixedly mounted on the machine body (11), the discharging device (2) comprises a bracket (21), the bracket (21) is fixedly mounted on the placing table (12), a driving motor (22) is fixedly mounted on an outer surface of the bracket (21), a driving shaft (23) penetrating the bracket (21) is fixedly connected to the output end of the driving motor (22), the driving shaft (23) is rotatably connected to the bracket (21), two fixed rods (24) are symmetrically fixedly connected to the driving shaft (23), a polishing barrel (25) is fixedly connected between the two fixed rods (24), and a solid-liquid separation device (3) is mounted on the placing table (12).

2. The automatic polishing machine for precision hardware parts according to claim 1, characterized in that: The solid-liquid separation device (3) comprises an upper cylinder (31), a mounting shell (32), a lower cylinder (33) and a support (34); the upper cylinder (31), the mounting shell (32), the lower cylinder (33) and the support (34) are fixedly connected together in sequence from top to bottom; the support (34) is fixedly connected to the placement table (12); a first screening assembly is installed in the upper cylinder (31); the first screening assembly comprises a mounting frame (311) fixedly mounted on the inner surface of the upper cylinder (31); the mounting frame (311) is provided with a plurality of equally spaced slide grooves (312); a first sliding rod (313) is slidably connected in each of the plurality of slide grooves (312); a bottom plate (314) is fixedly connected to the bottom end of the first sliding rod (313); a return spring is fixedly connected between the bottom plate (314) and the bottom surface of the mounting frame (311); and a first holding ball (315) is fixedly mounted on the top end of the first sliding rod (313).

3. The automatic polishing machine for precision hardware parts according to claim 2, characterized in that: A second screening component is installed in the installation shell (32), the second screening component comprising a filter screen (321), a slot for connecting the upper cylinder (31) and the lower cylinder (33) is provided in the installation shell (32), and the filter screen (321) is slidably connected in the slot.

4. The automatic polishing machine for precision hardware parts according to claim 2, characterized in that: A reflux assembly is installed between the polishing barrel (25) and the lower cylinder (33), and the reflux assembly comprises a first conduit (251) and a reflux pipe (331), wherein the first conduit (251) is fixedly connected to the inner surface of the polishing barrel (25), and the reflux pipe (331) is fixedly connected to the bottom surface of the lower cylinder (33), the first conduit (251) and the reflux pipe (331) are connected together via a metal hose, and an automatic valve for preventing backflow is installed on one end of the first conduit (251) located in the polishing barrel (25).

5. The automatic polishing machine for precision hardware parts according to claim 4, characterized in that: The automatic valve comprises a valve body (252), the valve body (252) being fixedly connected to one end of a first conduit (251) located in the polishing barrel (25), the valve body (252) being provided with a cavity (2521) in communication with the first conduit (251), the bottom surface of the valve body (252) being provided with a reflux hole (2522) in communication with the cavity (2521), a piston plate (253) being slidably connected to an inner surface of the cavity (2521), a sealing tube (2531) being fixedly connected to a side surface of the piston plate (253) close to the first conduit (251), the sealing tube (2531) being slidably connected in the first conduit (251), the sealing tube (2531) being provided with a communicating groove (2532), and a first spring (2533) being fixedly connected between the bottom surface of the piston plate (253) and an inner surface of the cavity (2521).

6. The automatic polishing machine for precision hardware parts according to claim 2, characterized in that: The solid-liquid separation device (3) is provided with a steel needle separation device (4), and the steel needle separation device (4) comprises a first top cover (41), the first top cover (41) is located directly above the upper cylinder (31), a second top cover (42) is slidably connected inside the first top cover (41), a hollow groove (421) is provided inside the second top cover (42), a plurality of mounting holes connected to the hollow groove (421) are provided on the bottom side surface of the second top cover (42), a first slide bar (422) is slidably connected inside the plurality of mounting holes, a second pressure holding ball (423) is fixedly installed on the bottom end of the first slide bar (422), the first slide bar (422) is located in the hollow groove (421), and a plurality of mounting holes are provided on the bottom side surface of the second top cover (421). 1) A first buffer spring (424) is fixedly connected between an inner end and an inner surface of the empty groove (421); a second buffer spring (43) is fixedly connected between the first top cover (41) and the second top cover (42); a micro vibration motor (44) is fixedly connected to the first top cover (41); a fixing frame (45) is fixedly connected to the placement table (12); a first mounting plate (451) and a second mounting plate (452) are respectively mounted on the fixing frame (45); a threaded groove is formed on the first mounting plate (451); a threaded rod (49) is threadedly connected in the threaded groove; and the bottom end of the threaded rod (49) is fixedly connected to the second top cover (42).

7. The automatic polishing machine for precision hardware parts according to claim 6, characterized in that: An automatic lifting component is mounted on the fixing frame (45), and the automatic lifting component comprises a first transmission wheel (231) fixedly mounted on the driving shaft (23); a first transmission shaft (46) is rotatably connected to a side wall of the fixing frame (45); a second transmission wheel (461) is fixedly connected to one end of the first transmission shaft (46); the first transmission wheel (231) and the second transmission wheel (461) are transmission-connected via a transmission belt (232); a worm (462) is fixedly connected to one end of the first transmission shaft (46) away from the second transmission wheel (461); a second transmission shaft (47) is rotatably connected inside the first mounting plate (451); and a second transmission shaft (47) is fixedly connected to the bottom end of the second transmission shaft (47) and is connected to the worm (462). A worm gear (471) is meshedly connected to the second transmission shaft (47), a first limit member (472) is fixedly connected to the second mounting plate (452) for limited rotation, a first gear (473) is fixedly connected to the first limit member (472), a second limit member (48) is internally connected to the second mounting plate (452) for limited rotation, a second limit member (48) is fixedly connected to the second limit member (48) for meshing with the first gear (473), a square limit rod (482) is fixedly connected to the bottom end of the second limit member (48), a limit groove (491) matching the square limit rod (482) is opened in the threaded rod (49), and the square limit rod (482) is slidably connected in the limit groove (491).

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