Multi-surface grinding type automatic sanding machine

Abstract

The invention relates to the field of sanding machines, in particular to a multi-face polishing type automatic sanding machine. The sanding machine comprises an L-shaped support, a polishing part, a polishing part two-axis moving mechanism, a support swing mechanism, a product detection mechanism, a product horizontal conveying line, a product carrier, a product centering mechanism, a conveying line lifting mechanism, a water spraying mechanism, a machine table and a distance adjusting mechanism. The bracket swing mechanism drives the L-shaped bracket and the polishing part to swing up and down within a 90-degree range. The polishing part can be driven by the polishing part two-axis moving mechanism to linearly move in the X-axis direction and the Y-axis direction along the L-shaped support in the X-axis direction and the Y-axis direction. And the appearance of the polished product can be automatically detected through the product detection mechanism. And products with different sizes can be centered and positioned in the product carrier through the product centering mechanism. According to the grinding device, the grinding part can be driven to move in different directions to grind the surfaces, in different directions, of the product, grinding automation is improved, and therefore the grinding efficiency is improved.

Description

Technical Field

[0001] The invention relates to the field of sanding machines, in particular to a multi-surface grinding automatic sanding machine. Background Art

[0002] A sanding machine is a device that uses a motor to drive a grinding wheel to rotate at high speed, and uses the rotating grinding wheel to grind, deburr and clean the product. The sanding machine is composed of a base, a grinding wheel, a motor or other power source, a bracket, a protective cover and a water supply. However, the existing grinding machine can only swing up and down. If you want to grind different surfaces of the product, you can only adjust the position and angle of the product to match the grinding wheel. In addition, it is necessary to manually place the product at the designated grinding station. After grinding, the appearance of the product must be manually inspected, so the work efficiency is low and the grinding accuracy is insufficient. Summary of the invention

[0003] In order to overcome the disadvantage of low working efficiency of the existing sanding machine, the present invention provides a multi-surface grinding automatic sanding machine.

[0004] The technical solution adopted by the present invention to solve its technical problems is: a multi-surface grinding type automatic sanding machine, including an L-shaped bracket, a grinding part, a two-axis moving mechanism of the grinding part, a bracket swinging mechanism, a product detection mechanism, a product horizontal conveyor line, a product carrier, a product centering mechanism, a conveyor line lifting mechanism, a water spraying mechanism, a machine table, and a distance adjustment mechanism. Two mutually symmetrical L-shaped brackets are hinged on the machine table, and a two-axis moving mechanism of the grinding part for driving the grinding part to move along mutually perpendicular X-axis and Y-axis is installed on the L-shaped bracket. A bracket swinging mechanism for driving the two L-shaped brackets to swing symmetrically is installed on the machine table. A product detection mechanism for detecting the product shape is arranged above the product horizontal conveyor line, and a conveyor line lifting mechanism for driving the product horizontal conveyor line to rise and fall is arranged above the machine table. The lifting part of the conveyor line lifting mechanism is connected to the product horizontal conveyor line, and the product horizontal conveyor line is connected with a product carrier. A product centering mechanism for moving products of different sizes to a central position is installed in the product carrier. A water spraying mechanism for spraying water for cooling when the grinding part grinds the product is installed on the two-axis moving mechanism of the grinding part. A distance adjusting mechanism is installed on the two-axis moving mechanism of the grinding part. The grinding part is installed on the distance adjusting mechanism. The grinding part, the two-axis moving mechanism of the grinding part, the bracket swinging mechanism, the product detection mechanism, the product horizontal conveyor line, the product centering mechanism, the conveyor line lifting mechanism, the water spraying mechanism, and the distance adjusting mechanism are all electrically connected to the PLC; the grinding part includes a grinding wheel and a grinding wheel rotating motor. The output shaft of the grinding wheel rotating motor is fixed on the grinding wheel, and the distance adjusting mechanism is a servo electric cylinder.

[0005] According to another embodiment of the present invention, the machine further includes a base fixed on the machine, a shaft fixed in the base, a plurality of ball bearings sequentially sleeved and fixed on the shaft, the plurality of ball bearings are respectively fixed in a plurality of semicircular plates, and the tail ends of a plurality of L-shaped brackets are all fixed on the straight edges of the plurality of semicircular plates.

[0006] According to another embodiment of the present invention, the two-axis moving mechanism of the grinding part further includes a linear module, a servo electric cylinder, and a linear guide rod. The angle between the two sides of the L-shaped bracket is ninety degrees. The cylinder body of the servo electric cylinder is fixed on one side of the L-shaped bracket. The piston rod end of the servo electric cylinder is fixed on the cylinder body of the linear module. The cylinder body of the linear module is parallel to one side of the L-shaped bracket. One or more linear guide rods are fixed on the cylinder body of the linear module. The linear guide rods pass through the guide holes on the L-shaped bracket. The bodies of the water spraying mechanism and the distance adjusting mechanism are both installed on the slide seat of the linear module.

[0007] According to another embodiment of the present invention, the bracket swing mechanism further includes an arc-shaped rack, a straight rack, and an opening and closing mechanism. The opening and closing mechanism includes a casing, a slide, a positive and negative threaded screw, a nut, and a motor. The arc-shaped rack is fixed on the arc surface of the semicircular plate, and a positive and negative threaded screw is rotatably connected in the casing. Nuts are threadedly connected to the positive thread section and the negative thread section of the positive and negative threaded screw. The two nuts are respectively fixed on the two slides, and the two slides are both slidably connected to the casing. The positive and negative threaded screw is connected to the output shaft of the motor, and several parallel straight racks are fixed on the two slides. The straight racks on the two slides are respectively meshed with the corresponding arc-shaped racks on both sides.

[0008] According to another embodiment of the present invention, the product detection mechanism further includes an arc track, an arc rack 1, a gear, a gear rotating motor, a track wheel, a base, and a CCD camera. The CCD camera and the body of the gear rotating motor are fixed on the base, a gear is fixed on the output shaft of the gear rotating motor, an arc rack 1 is fixed on the inner side of the arc track, the arc rack 1 is meshed with the gear, the base is rotatably connected to the track wheel through a bracket, and the track wheel cooperates with the outer side of the arc track.

[0009] According to another embodiment of the present invention, the product horizontal conveyor line is further included as a double-chain conveyor, and one or more guide rods are fixed to the bottom of the machine platform of the product horizontal conveyor line, and the guide rods vertically pass through the guide holes on the support table, and the platform of the support table is located above the machine platform.

[0010] According to another embodiment of the present invention, the product centering mechanism further includes a clapper and a clapper driving cylinder, two opposite clapper driving cylinders are fixed in a product carrier, and a clapper is fixed on the piston rod of the clapper driving cylinder; the product carrier includes a groove for placing the bottom of the product and a wing edge for supporting the product, and the two clappers are placed in the groove.

[0011] According to another embodiment of the present invention, the conveyor line lifting mechanism is further comprised of a lifting electric cylinder, a cylinder body of the conveyor line lifting mechanism is fixed on a support platform, and a piston rod of the conveyor line lifting mechanism is fixed on a machine platform of the product horizontal conveyor line.

[0012] According to another embodiment of the present invention, the water spray mechanism further includes a nozzle, a nozzle rotating motor, and a water pump, the water pump is connected to the nozzle through a hose, the nozzle is fixed on the output shaft of the nozzle rotating motor, and the body of the nozzle rotating motor is fixed on the slide of the linear module.

[0013] According to another embodiment of the present invention, the machine platform further includes a support seat fixed thereon for supporting the L-shaped bracket, a limiting rod fixed thereon, a support seat 2 for supporting the limiting rod fixed thereon of the sliding seat of the opening and closing mechanism, and an arc-shaped groove is provided on the top of the support seat 2 for cooperating with the limiting rod.

[0014] The beneficial effect of the present invention is that the invention drives the L-shaped bracket and the polishing part to swing up and down within a range of 90 degrees through the bracket swing mechanism, so that the polishing part can polish the upper end surface and side surfaces of the product. The two-axis moving mechanism of the polishing part can drive the polishing part to move in two vertical directions of the X-axis and the Y-axis along the L-shaped bracket. The product inspection mechanism can automatically perform appearance inspection on the polished products. The product horizontal conveyor line drives the product carrier loaded with products to move between different workstations. The product centering mechanism can center products of different sizes in the product carrier. The present application can drive the polishing part to move in different directions to polish surfaces of products in different directions, thereby improving the automation of polishing and thus improving the polishing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0016] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 It is a structural schematic diagram of the bracket swing mechanism of the present invention; Figure 3 It is a structural schematic diagram of the product detection mechanism of the present invention; Figure 4 It is a structural schematic diagram of the product centering mechanism of the present invention; In the figure, 1. L-shaped bracket, 2. grinding part, 3. grinding part two-axis moving mechanism, 4. bracket swing mechanism, 5. product detection mechanism, 6. product horizontal conveyor line, 7. product carrier, 8. product centering mechanism, 9. conveyor line lifting mechanism, 10. water spray mechanism, 11. machine table, 12. distance adjustment mechanism, 13. base, 14. shaft, 15. semicircular plate, 16. guide rod 1, 17. support table, 18. support seat, 19. limit rod, 20. support seat 2, 31. linear module, 32. servo electric cylinder, 33. linear guide rod, 41. arc rack, 42. straight rack, 43. housing, 44. slide seat, 45. positive and negative thread screw, 46. nut, 51. arc track, 52. arc rack 1, 53. gear, 54. Gear rotating motor, 55. Track wheel, 56. Machine base, 57. CCD camera, 71. Groove, 72. Wing edge, 81. Clapper, 82. Clapper driving cylinder. DETAILED DESCRIPTION

[0017] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 It is a structural schematic diagram of the bracket swing mechanism of the present invention; Figure 3 It is a structural schematic diagram of the product detection mechanism of the present invention; Figure 4 It is a structural schematic diagram of the product centering mechanism of the present invention.

[0018] As attached Figure 1As shown, a multi-surface grinding automatic sanding machine comprises an L-shaped bracket 1, a grinding part 2, a grinding part two-axis moving mechanism 3, a bracket swinging mechanism 4, a product inspection mechanism 5, a product horizontal conveyor line 6, a product carrier 7, a product centering mechanism 8, a conveyor line lifting mechanism 9, a water spraying mechanism 10, a machine table 11, and a distance adjustment mechanism 12. Two mutually symmetrical L-shaped brackets 1 are hinged on the machine table 11, and a grinding part two-axis moving mechanism 3 for driving the grinding part 2 to move along mutually perpendicular X-axis and Y-axis is installed on the L-shaped bracket 1. A bracket swinging mechanism 4 for driving the two L-shaped brackets 1 to swing symmetrically is installed on the machine table 11. A product inspection mechanism 5 for detecting the product shape is arranged above the product horizontal conveyor line 6. A conveyor line lifting mechanism 9 for driving the product horizontal conveyor line 6 to rise and fall is arranged above the machine table 11. The lifting part of 9 is connected to the product horizontal conveyor line 6, and the product horizontal conveyor line 6 is connected to a product carrier 7. A product centering mechanism 8 for moving products of different sizes to a central position is installed in the product carrier 7. A water spraying mechanism 10 for spraying water for cooling when the grinding part 2 grinds the product is installed on the two-axis moving mechanism 3 of the grinding part. A distance adjusting mechanism 12 is installed on the two-axis moving mechanism 3 of the grinding part, and the grinding part 2 is installed on the distance adjusting mechanism 12. The grinding part 2, the two-axis moving mechanism 3 of the grinding part, the bracket swinging mechanism 4, the product detection mechanism 5, the product horizontal conveyor line 6, the product centering mechanism 8, the conveyor line lifting mechanism 9, the water spraying mechanism 10, and the distance adjusting mechanism 12 are all electrically connected to the PLC; the grinding part 2 includes a grinding wheel and a grinding wheel rotating motor, the output shaft of the grinding wheel rotating motor is fixed on the grinding wheel, and the distance adjusting mechanism 12 is a servo electric cylinder.

[0019] A base 13 is fixed on the machine 11, a shaft 14 is fixed in the base 13, and several ball bearings are sequentially sleeved and fixed on the shaft 14. The several ball bearings are respectively fixed in several semicircular plates 15, and the tail ends of several L-shaped brackets 1 are fixed on the straight edges of the several semicircular plates 15.

[0020] The two-axis moving mechanism 3 of the grinding part includes a linear module 31, a servo electric cylinder 32, and a linear guide rod 33. The angle between the two sides of the L-shaped bracket 1 is ninety degrees. The cylinder body of the servo electric cylinder 32 is fixed on one side of the L-shaped bracket 1. The piston rod end of the servo electric cylinder 32 is fixed on the cylinder body of the linear module 31. The cylinder body of the linear module 31 is parallel to one side of the L-shaped bracket 1. One or more linear guide rods 33 are fixed on the cylinder body of the linear module 31. The linear guide rods 33 pass through the guide holes on the L-shaped bracket 1. The bodies of the water spraying mechanism 10 and the distance adjusting mechanism 12 are both installed on the slide seat of the linear module 31.

[0021] The slide seat of the linear module 31 can drive the grinding part 2 to move linearly along the cylinder body of the linear module 31 , and the piston rod of the servo electric cylinder 32 can be extended and retracted to drive the grinding part 2 to move linearly along a direction perpendicular to the cylinder body of the linear module 31 .

[0022] As attached Figure 2 As shown, the bracket swing mechanism 4 includes an arcuate rack 41, a spur rack 42, and an opening and closing mechanism. The opening and closing mechanism includes a housing 43, a slide 44, a positive and negative threaded screw rod 45, a nut 46, and a motor. The arcuate rack 41 is fixed on the arcuate surface of the semicircular plate 15, and the housing 43 is rotatably connected with the positive and negative threaded screw rod 45. The positive thread section and the negative thread section of the positive and negative threaded screw rod 45 are both threadedly connected with nuts 46. The two nuts 46 are respectively fixed on the two slides 44. The two slides 44 are both slidably connected to the housing 43. The positive and negative threaded screw rod 45 is connected to the output shaft of the motor. Several parallel spur racks 42 are fixed on the two slides 44. The spur racks 42 on the two slides 44 are respectively meshed with the corresponding arcuate racks 41 on both sides.

[0023] The motor of the opening and closing mechanism drives the forward and reverse thread screw 45 to rotate, so that the two nuts move in opposite directions or relative to each other along the rod body of the forward and reverse thread screw 45, and the two nuts drive the two slides 44 and the spur racks 42 on the two slides 44 to move in opposite directions or relative to each other. The spur racks 42 can drive the arc-shaped racks 41 meshing therewith to swing, and the arc-shaped racks 41 can drive the semicircular plate 15 to rotate back and forth along the shaft 14, thereby realizing the swing of the L-shaped bracket 1 and the grinding part 2 on the vertical plane.

[0024] As attached Figure 3 As shown, the product inspection mechanism 5 includes an arc track 51, an arc rack 52, a gear 53, a gear rotating motor 54, a track wheel 55, a base 56, and a CCD camera 57. The CCD camera 57 and the body of the gear rotating motor 54 are fixed on the base 56. The gear 53 is fixed on the output shaft of the gear rotating motor 54. An arc rack 52 is fixed on the inner side of the arc track 51. The arc rack 52 is meshed with the gear 53. The base 56 is rotatably connected to the track wheel 55 through a bracket, and the track wheel 55 cooperates with the outer side of the arc track 51.

[0025] The output shaft of the gear rotating motor 54 drives the gear 53 to rotate, and the gear 53 moves along the arc rack 52, thereby driving the base 56 and the CCD camera 57 to move along the arc track 51. This can help the CCD camera 57 to transmit the appearance image information of the two sides and the top of the product to the PLC, and the PLC determines whether the appearance of the product is qualified.

[0026] The product horizontal conveyor line 6 is a double-chain conveyor. One or more guide rods 16 are fixed to the bottom of the machine platform of the product horizontal conveyor line 6. The guide rods 16 vertically pass through the guide holes on the support platform 17. The platform of the support platform 17 is located above the machine platform 11.

[0027] As attached Figure 4As shown, the product centering mechanism 8 includes a clapper 81 and a clapper driving cylinder 82. Two opposing clapper driving cylinders 82 are fixed in the product carrier 7. The clapper 81 is fixed on the piston rod of the clapper driving cylinder 82. The product carrier 7 includes a groove 71 for placing the bottom of the product and a wing edge 72 for supporting the product. Both clappers 81 are placed in the groove 71.

[0028] When the product is placed on the product carrier 7 and the bottom protrusion of the product is placed in the groove 71, the clapper driving cylinders 82 on both sides respectively drive the two clappers 81 to move toward the middle. When the two clappers 81 clamp the bottom protrusion of the product, the product is pushed to the center position.

[0029] The conveyor line lifting mechanism 9 is a lifting electric cylinder, the cylinder body of the conveyor line lifting mechanism 9 is fixed on the support platform 17, and the piston rod of the conveyor line lifting mechanism 9 is fixed on the machine platform of the product horizontal conveyor line 6.

[0030] The water spray mechanism 10 includes a nozzle, a nozzle rotating motor, and a water pump. The water pump is connected to the nozzle through a hose. The nozzle is fixed on the output shaft of the nozzle rotating motor. The body of the nozzle rotating motor is fixed on the slide seat of the linear module 31. The nozzle rotating motor can drive the nozzle to swing at different angles.

[0031] A support seat 18 for supporting the L-shaped bracket 1 is fixed on the machine table 11, a limit rod 19 is fixed on the semicircular plate 15, and a support seat 20 for supporting the limit rod 19 is fixed on the sliding seat 44 of the opening and closing mechanism. An arc-shaped groove is provided on the top of the support seat 20 for cooperating with the limit rod 19.

[0032] When the L-shaped bracket 1 swings outward to a horizontal state, the support seat 18 will support the back of the L-shaped bracket 1. When the L-shaped bracket 1 swings inward to a vertical state, the limit rod 19 on the semicircular plate 15 will press into the arc-shaped groove of the support seat 20. In this way, the L-shaped bracket 1 can be supported at both ends of 90 degrees.

[0033] The working method of the present application is as follows: first, place the product on the product carrier 7, and the product centering mechanism 8 will center the product on the product carrier 7. Then the product horizontal conveyor line 6 will convey the product forward horizontally to the grinding position. When the upper end surface of the product is to be polished, the bracket swing mechanism 4 drives the two L-shaped brackets 1 and the grinding part 2 to swing inward to a vertical state, and at this time the cylinder body of the linear module 31 is parallel to the table surface of the machine table 11. Then the servo electric cylinder 32 drives the grinding part 2 to move downward to the grinding height, and then the distance adjustment mechanism 12 drives the grinding wheel of the grinding part 2 to fit the surface of the product, and the linear module 31 drives the grinding part 2 to move back and forth horizontally, so that the rotating grinding wheel can be used to grind the upper surface of the product.

[0034] When the side of the product is to be polished, the two L-shaped brackets 1 and the polishing part 2 are swung outward by 90 degrees. At this time, the cylinder body of the linear module 31 is perpendicular to the table surface of the machine table 11. The linear module 31 drives the polishing part 2 to move up and down to adjust the height. Then the servo electric cylinder 32 drives the polishing part 2 to move horizontally to the polishing position, and the distance adjustment mechanism 12 drives the grinding wheel of the polishing part 2 to fit the surface of the product, and the rotating grinding wheel is used to polish the side of the product.

[0035] After polishing, the product is moved horizontally to the bottom of the product inspection mechanism 5, and the CCD camera 57 transmits the image information of the product to the PLC to determine whether the appearance is qualified.

Claims

1. A multi-surface grinding automatic sanding machine, characterized in that: The invention comprises an L-shaped bracket (1), a grinding part (2), a grinding part two-axis moving mechanism (3), a bracket swinging mechanism (4), a product inspection mechanism (5), a product horizontal conveyor line (6), a product carrier (7), a product centering mechanism (8), a conveyor line lifting mechanism (9), a water spraying mechanism (10), a machine table (11), and a distance adjustment mechanism (12). The machine table (11) is hinged with two mutually symmetrical L-shaped brackets (1). The L-shaped bracket (1) is provided with a grinding part two-axis moving mechanism (3) for driving the grinding part (2) to move along mutually perpendicular X-axis and Y-axis. The machine table (11) is provided with a bracket swinging mechanism (4) for driving the two L-shaped brackets (1) to swing symmetrically. A product inspection mechanism (5) for detecting the appearance of the product is provided above the product horizontal conveyor line (6). A conveyor line lifting mechanism (9) for driving the product horizontal conveyor line (6) to move up and down is provided above the machine table (11). The lifting part of the conveyor line lifting mechanism (9) The product carrier (7) is connected to a product horizontal conveyor line (6), the product horizontal conveyor line (6) is connected to a product carrier (7), a product centering mechanism (8) for moving products of different sizes to a central position is installed in the product carrier (7), a water spraying mechanism (10) for spraying water for cooling when the product is being polished in the polishing part (2) is installed on the two-axis moving mechanism (3) of the polishing part, a distance adjustment mechanism (12) is installed on the two-axis moving mechanism (3) of the polishing part, the polishing part (2) is installed on the distance adjustment mechanism (12), the polishing part (2), the two-axis moving mechanism (3) of the polishing part, the bracket swing mechanism (4), the product detection mechanism (5), the product horizontal conveyor line (6), the product centering mechanism (8), the conveyor line lifting mechanism (9), the water spraying mechanism (10), and the distance adjustment mechanism (12) are all electrically connected to the PLC; the polishing part (2) comprises a grinding wheel and a grinding wheel rotating motor, the output shaft of the grinding wheel rotating motor is fixed on the grinding wheel, and the distance adjustment mechanism (12) is a servo electric cylinder.

2. The multi-surface grinding automatic sanding machine according to claim 1 is characterized in that: A base (13) is fixed on the machine platform (11), a shaft (14) is fixed inside the base (13), a plurality of ball bearings are sequentially sleeved and fixed on the shaft (14), the plurality of ball bearings are respectively fixed inside a plurality of semicircular plates (15), and the tail ends of the plurality of L-shaped brackets (1) are all fixed on the straight edges of the plurality of semicircular plates (15).

3. The multi-surface grinding automatic sanding machine according to claim 1, characterized in that: The grinding section two-axis moving mechanism (3) comprises a linear module (31), a servo electric cylinder (32), and a linear guide rod (33); the included angle of the two sides of the L-shaped bracket (1) is ninety degrees; a cylinder body of the servo electric cylinder (32) is fixed on one side of the L-shaped bracket (1); the piston rod end of the servo electric cylinder (32) is fixed on the cylinder body of the linear module (31); the cylinder body of the linear module (31) and one side of the L-shaped bracket (1) are parallel to each other; one or more linear guide rods (33) are fixed on the cylinder body of the linear module (31); the linear guide rods (33) pass through guide holes on the L-shaped bracket (1); and the bodies of the water spray mechanism (10) and the distance adjustment mechanism (12) are both mounted on the slide seat of the linear module (31).

4. The multi-surface grinding automatic sanding machine according to claim 2, characterized in that: The bracket swing mechanism (4) comprises an arc-shaped rack (41), a straight rack (42), and an opening and closing mechanism. The opening and closing mechanism comprises a housing (43), a slide seat (44), a positive and negative threaded screw rod (45), a nut (46), and a motor. The arc-shaped rack (41) is fixed on the arc surface of the semicircular plate (15). The housing (43) is rotatably connected with the positive and negative threaded screw rod (45). The positive thread section and the negative thread section of the positive and negative threaded screw rod (45) are both threadedly connected with nuts (46). The two nuts (46) are respectively fixed on the two slide seats (44). The two slide seats (44) are both slidably connected to the housing (43). The positive and negative threaded screw rod (45) is connected to the output shaft of the motor. The two slide seats (44) are both fixed with a plurality of parallel straight racks (42). The straight racks (42) on the two slide seats (44) are respectively meshed with the corresponding arc-shaped racks (41) on both sides.

5. The multi-surface grinding automatic sanding machine according to claim 1 is characterized in that: The product detection mechanism (5) comprises an arc track (51), an arc rack (52), a gear (53), a gear rotating motor (54), a track wheel (55), a machine base (56), and a CCD camera (57). The CCD camera (57) and the body of the gear rotating motor (54) are fixed on the machine base (56). The gear (53) is fixed on the output shaft of the gear rotating motor (54). An arc rack (52) is fixed on the inner side of the arc track (51). The arc rack (52) is meshed with the gear (53). The machine base (56) is rotatably connected to the track wheel (55) through a bracket. The track wheel (55) is matched with the outer side of the arc track (51).

6. The multi-surface grinding automatic sanding machine according to claim 1, characterized in that: The product horizontal conveyor line (6) is a double-chain conveyor. One or more guide rods (16) are fixed to the bottom of the machine platform of the product horizontal conveyor line (6). The guide rods (16) vertically pass through the guide holes on the support platform (17). The platform of the support platform (17) is located above the machine platform (11).

7. The multi-surface grinding automatic sanding machine according to claim 1, characterized in that: The product centering mechanism (8) comprises a clapper (81) and a clapper driving cylinder (82), wherein two opposing clapper driving cylinders (82) are fixed in a product carrier (7), and a clapper (81) is fixed on a piston rod of the clapper driving cylinder (82); the product carrier (7) comprises a groove (71) for placing a bottom of the product and a wing edge (72) for supporting the product, and the two clappers (81) are both placed in the groove (71).

8. The multi-surface grinding automatic sanding machine according to claim 6, characterized in that: The conveyor line lifting mechanism (9) is a lifting electric cylinder, the cylinder body of the conveyor line lifting mechanism (9) is fixed on the support platform (17), and the piston rod of the conveyor line lifting mechanism (9) is fixed on the machine platform of the product horizontal conveyor line (6).

9. The multi-surface grinding automatic sanding machine according to claim 3, characterized in that: The water spray mechanism (10) comprises a nozzle, a nozzle rotating motor, and a water pump, wherein the water pump is connected to the nozzle via a hose, the nozzle is fixed on the output shaft of the nozzle rotating motor, and the body of the nozzle rotating motor is fixed on the slide seat of the linear module (31).

10. The multi-surface grinding automatic sanding machine according to claim 4, characterized in that: A support seat (18) for supporting the L-shaped bracket (1) is fixed on the machine platform (11), a limit rod (19) is fixed on the semicircular plate (15), a second support seat (20) for supporting the limit rod (19) is fixed on the sliding seat (44) of the opening and closing mechanism, and an arc-shaped groove for matching the limit rod (19) is provided on the top of the second support seat (20).

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