Automatic polishing device for metal workpiece machining

Abstract

An automatic polishing device for metal workpiece machining comprises a polishing belt and a driving roller, a plurality of polishing units are arranged on the periphery of the outer side face of the polishing belt, a plurality of polishing areas with the number of polishing meshes increasing step by step are arranged in each polishing unit, and when the driving roller drives the polishing belt to conduct transmission, the polishing units are driven by the driving roller to rotate. When the polishing belt is used for polishing the workpieces, the polishing areas with the set mesh number can make contact with the workpieces, when the polishing belt is used for polishing the workpieces, the workpieces are polished gradually from the polishing areas with the low mesh number to the polishing areas with the high mesh number, and therefore the workpieces are polished in sequence from low mesh number to high mesh number through the polishing belt. The step-by-step refining polishing process is beneficial for obtaining uniform, smooth and fine surface smoothness, a grinding belt and equipment do not need to be replaced, and the relative cost is lower.

Description

Technical Field

[0001] This invention belongs to the field of metal polishing technology, specifically referring to an automatic polishing device for processing metal workpieces. Background Technology

[0002] After metal workpieces undergo machining, cutting, welding, and other processes, unevenness, burrs, or oxide layers may develop on their surfaces. These defects not only affect the product's appearance but also reduce its durability. Therefore, polishing is essential for metal parts. Polishing removes these surface imperfections, leaving the metal surface smooth and shiny, restoring the metal's natural color, and thus improving the overall quality of the product.

[0003] In the polishing process of metal workpieces, in order to obtain better polishing results, it is generally necessary to change the polishing belt with different grit. By gradually changing the polishing belt with different grit, the microstructure of the metal surface can be gradually refined, thereby achieving a better polishing effect. This gradual refinement polishing process helps to obtain a uniform, smooth, and delicate surface finish. However, changing the polishing belt with different grit will increase the polishing steps. Generally, polishing with different grit is carried out at multiple workstations, which increases the investment of equipment and manpower. Therefore, how to improve polishing efficiency while maintaining the corresponding polishing effect has become an urgent problem to be solved. Summary of the Invention

[0004] In view of the above situation and to overcome the defects of the prior art, the purpose of the present invention is to provide an automatic polishing device for metal workpiece processing, so as to at least partially solve the problems mentioned in the background art.

[0005] The technical solution adopted by this invention is as follows: An automatic polishing device for metal workpiece processing is proposed, comprising: Conveyor table, used for conveying workpieces; A grinding box is positioned above the conveyor table; A polishing belt is disposed inside the grinding box; A drive roller is disposed inside the grinding box and located inside the polishing belt, for driving the polishing belt to polish the workpiece on the conveyor table; The polishing belt has multiple grinding units around its outer surface. Each grinding unit has multiple grinding areas with progressively increasing grit sizes. When the drive roller drives the polishing belt, the grinding area with the set grit size can come into contact with the workpiece.

[0006] Furthermore, the polishing belt includes multiple equidistantly arranged grinding discs, and the multiple grinding discs with different grit numbers together constitute a grinding unit. The contact surface between each grinding disc and the workpiece is set as the grinding area. The grit numbers of the grinding discs in the same grinding unit are distributed from small to large or from large to small, and the grinding discs in multiple grinding units are distributed in a cyclical manner.

[0007] Furthermore, the drive roller includes the roller body and a ring sleeve fitted on the outside of the roller body. The ring sleeve is provided with a plurality of equidistant positioning strips along the circumferential direction. The spacing of the positioning strips is consistent with the spacing of the grinding discs, and the plurality of positioning strips together constitute at least one set of positioning units. The number and position of the positioning strips in each set of positioning units correspond one-to-one with the number and position of the grinding discs in the grinding unit. When the drive roller drives the polishing belt, the positioning unit corresponds to the position of the grinding unit. A filling part is provided between the roller body and the ring sleeve. The filling part is configured to drive the positioning strip set in the positioning unit to move radially, so that the corresponding grinding disc in the grinding unit contacts or de-contacts the workpiece.

[0008] Furthermore, the filling part includes a filling ring and elastic filling strips distributed between the positioning strips and the filling rings. The number of filling rings is the same as the number of positioning strips in each group of positioning units. Multiple filling rings are installed on the outside of the roller body in the axial direction. The number of elastic filling strips is the same as the number of positioning strips, and multiple elastic filling strips together constitute an elastic filling unit corresponding to the number and position of the positioning units. Multiple elastic filling strips in the same elastic filling unit are respectively connected to multiple filling rings. Depending on the required grit number of the workpiece, a single filling ring can control the elastic filling strip at the corresponding position in the elastic filling unit to lift the positioning strip in the positioning unit, so that the positioning strip squeezes the grinding disc of the set grit number radially outward to contact the workpiece.

[0009] Furthermore, the ring sleeve is provided with a limiting groove for accommodating and allowing the positioning strip to move radially, and the side of the elastic filling strip near the positioning strip is configured as a deformation part, and the radial position of the positioning strip in the limiting groove is controlled by the volume change of the deformation part; The positioning strip has a first position in the radial position within the limiting groove. When the positioning strip is in the first position, the grinding disc is in contact with the workpiece. When the positioning strip is inside the first position, the grinding disc is out of contact with the workpiece. When the positioning strip is outside the first position, the contact pressure between the grinding disc and the workpiece increases.

[0010] Furthermore, the roller body is provided with a roller cavity, and the roller cavity is provided with a guide plate corresponding to the number of filling rings. The roller body is rotatably connected to the guide plate, and the roller body is provided with a plurality of independent connecting holes that connect the corresponding filling rings to the guide plate. Each guide plate is connected to an external pressure regulating device through a filling tube for adjusting the volume change of the deformed part.

[0011] Furthermore, the polishing belt also includes a base belt, which has a positioning groove for each of the grinding discs. An elastic band is adhered to the surface of the base belt, and multiple grinding discs are adhered to the outer side of the elastic band. The radial position of the positioning strip in the limiting groove also includes a second position, which is located inside the first position. When the positioning strip is in the second position, the end of the positioning strip is located in the positioning groove. The drive roller moves synchronously with the polishing belt.

[0012] Furthermore, the polishing box includes an outer casing and a movable box located inside the outer casing. The drive roller is located inside the movable box on the side near the conveyor table. A driven roller is rotatably mounted on the top of the movable box. The polishing belt is sleeved on the outside of the drive roller and the driven roller. A driver for driving the drive roller to rotate is provided on the outside of the outer casing. A screw sleeve is fixedly provided on the top of the outer casing. A lead screw handwheel is screwed into the screw sleeve. The end of the lead screw handwheel is rotatably connected to the movable box, and the distance between the drive roller and the conveyor table is adjusted by the lead screw handwheel.

[0013] Furthermore, the interior of the active box is provided with a cleaning groove, which is located between the driven roller and the driving roller. The cleaning groove includes an air guide groove, and the air guide groove has a window for the polishing belt to pass through. The air guide groove is provided with two sets of cleaning brushes distributed on the inner and outer sides of the polishing belt. Both ends of the air guide groove are connected to air guide pipes, which are connected to an external circulating exhaust device.

[0014] Furthermore, the inner side of the conveyor table is provided with a conveyor belt for conveying the workpiece. The conveyor belt is located below the drive roller. The surface of the conveyor belt is provided with a plurality of equidistant limiting strips. A discharge hopper is fixedly provided on the conveyor table corresponding to the discharge end of the conveyor belt.

[0015] Beneficial effects: This invention provides a series of polishing units on the outer side of the polishing belt. Each polishing unit contains multiple polishing areas with progressively increasing grit sizes. When the polishing belt is driven by the drive roller, the workpiece is polished sequentially from the low-grit polishing area to the high-grit polishing area. Thus, the workpiece is polished sequentially with increasing grit size using a single polishing belt. This progressively refined polishing process helps to obtain a uniform, smooth, and delicate surface finish, and it eliminates the need to replace the polishing belt and equipment, resulting in lower costs. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of an automatic polishing device for metal workpiece processing according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the internal structure of the grinding box according to an embodiment of the present invention; Figure 3 A three-dimensional structural schematic diagram of the drive roller is provided for an embodiment of the present invention; Figure 4 A three-dimensional structural diagram of the cross-section of the drive roller is provided for an embodiment of the present invention; Figure 5 This invention provides a schematic diagram of the cross-section of the drive roller in an embodiment of the invention. Figure 6 A schematic diagram of the internal structure of the drive roller is provided for an embodiment of the present invention; Figure 7 This is a schematic diagram of a partially disassembled polishing belt according to an embodiment of the present invention.

[0017] Among them, 10 is the conveyor table; 101 is the discharge hopper; 11 is the conveyor belt; 111 is the limiting strip; 20 is the grinding box; 21 is the outer casing; 211 is the screw sleeve; 22 is the movable box; 23 is the driven roller; 30 is the polishing belt; 31 is the base belt; 310 is the positioning groove; 32 is the elastic belt; 33 is the grinding disc; 330 is the gap channel; 331 is the first grinding disc; 332 is the second grinding disc; 333 is the third grinding disc; 40 is the drive roller; 400 is the roller cavity; 41 is the roller body; 410 is the connecting hole; 411 is the drive shaft; 412 is the support shaft; 42 is the ring sleeve; 420 is the limiting groove; and 43 is the filling part. 431. Filling ring; 4311. First filling ring; 4312. Second filling ring; 4313. Third filling ring; 432. Elastic filling strip; 4321. First elastic filling strip; 4322. Second elastic filling strip; 4323. Third elastic filling strip; 44. Positioning strip; 441. First positioning strip; 442. Second positioning strip; 443. Third positioning strip; 45. Guide plate; 450. Filling cavity; 451. Filling tube; 50. Cleaning groove; 500. Air duct; 51. Air guide groove; 510. With window; 52. Cleaning brush; 53. Air guide tube; 60. Screw handwheel; 70. Driver.

[0018] The accompanying drawings are provided to further understand the embodiments and form part of the specification. They are used together with the embodiments for explanation and do not constitute a limitation on the embodiments. Detailed Implementation

[0019] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection.

[0020] In the description of the embodiments, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the embodiments and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments.

[0021] During the polishing process of metal workpieces, if a grinding belt with too small a grit is used from the beginning, the surface of the metal workpiece may be damaged due to excessive grinding force. Conversely, if a grinding belt with too large a grit is used from the beginning, the rough layer on the surface of the metal workpiece may not be effectively removed. Therefore, gradually changing the grinding belt with different grits can ensure the smooth progress of the polishing process and avoid surface damage. Since the above polishing process currently requires changing the grinding belt or performing it at different workstations, it increases costs. Therefore, this invention provides an automatic polishing device for metal workpiece processing, which aims to polish workpieces with different grits using a single device without changing the grinding belt. The device mainly includes a conveyor table 10, a grinding box 20, a polishing belt 30, and a drive roller 40.

[0022] like Figure 1 and Figure 2 As shown, the conveyor table 10 is used to convey workpieces, the grinding box 20 is set above the conveyor table 10, the polishing belt 30 is set inside the grinding box 20, and the drive roller 40 is set inside the grinding box 20, located inside the polishing belt 30, and the drive roller 40 is used to drive the polishing belt 30 so that the polishing belt 30 polishes the workpieces on the conveyor table 10.

[0023] The outer side of the polishing belt 30 is provided with multiple grinding units, and each grinding unit is provided with multiple grinding areas with progressively increasing grit. When the drive roller 40 drives the polishing belt 30, the grinding area with the set grit can come into contact with the workpiece.

[0024] Taking the example that three different meshes of abrasive belts are required for polishing and grinding a metal workpiece, there are three different mesh abrasive areas in one grinding unit. When the driving roller 40 drives the polishing belt 30 to drive, first, the workpiece is polished by the abrasive area with a lower mesh. After being polished with a lower mesh, the workpiece is then polished by the abrasive area with a medium mesh, and finally, the workpiece is polished by the abrasive area with a higher mesh. Thus, the workpiece is polished successively with increasing mesh by one polishing belt 30. This gradually refined polishing process helps to obtain a uniform, smooth, and delicate surface finish, and there is no need to replace the abrasive belt and equipment, resulting in relatively lower costs.

[0025] In some embodiments, a conveyor belt 11 for conveying workpieces is provided inside the conveying table 10. The conveyor belt 11 is located below the driving roller 40. A plurality of equally spaced limiting strips 111 are provided on the surface of the conveyor belt 11. A discharge hopper 101 is fixedly provided on the conveying table 10 corresponding to the discharge end of the conveyor belt 11.

[0026] During operation, the sheet metal workpiece is placed in the area between the limiting strips 111, moves forward in the state of being pushed by the limiting strips 111, and passes under the polishing belt 30 under the conveyance of the conveyor belt 11, and is polished and ground by the polishing belt 30. Different mesh abrasive areas are cyclically used to polish the workpiece, and after polishing, it is discharged from the discharge hopper 101.

[0027] Further, the grinding box 20 includes an outer box body 21 and a movable box 22 located inside the outer box body 21. The outer box body 21 is configured as a hollow box body with an open bottom. The movable box 22 is configured as a "C" - shaped structure, and the opening of the movable box 22 faces downward. The driving roller 40 is located inside the movable box 22 on the side close to the conveying table 10. A driven roller 23 is rotatably installed at the inner top end of the movable box 22. The polishing belt 30 is sleeved outside the driving roller 40 and the driven roller 23. A driver 70 for driving the driving roller 40 to rotate is provided outside the outer box body 21. The driver 70 can adopt a stepping motor. During operation, the driver 70 drives the driving roller 40 to rotate, and makes the polishing belt 30 circulate and drive outside the driven roller 23 and the driving roller 40 for polishing the workpiece on the conveyor belt 11.

[0028] Furthermore, a screw sleeve 211 is fixedly provided on the top of the outer box body 21. A screw - rod handwheel 60 is screwed and installed inside the screw sleeve 211. The end of the screw - rod handwheel 60 is rotatably connected to the movable box 22. By rotating the screw - rod handwheel 60, the distance between the driving roller 40 and the conveying table 10 can be adjusted. It should be understood that a space is reserved on the outer box body 21 for the movable box 22 and the output shaft part of the driver 70 to move. During the height adjustment process, the driver 70 moves up and down following the movable box 22, which does not affect the driving of the driving roller 40 by the driver 70.

[0029] Thus, depending on the different thicknesses of the workpiece, the screw handwheel 60 can be rotated in advance to adjust the relative height of the movable box 22 inside the outer box 21, so that the drive roller 40 and the workpiece on the conveyor belt 11 maintain a suitable distance, allowing the polishing belt 30 to polish the workpiece.

[0030] Furthermore, such as Figure 2 and Figure 7 As shown, the polishing belt 30 includes multiple equidistantly arranged grinding discs 33. Multiple grinding discs 33 with different grit numbers together constitute a grinding unit. The contact surface between each grinding disc 33 and the workpiece is set as the grinding area. The grit numbers of the grinding discs 33 in the same grinding unit are distributed from small to large or from large to small. The grinding discs 33 in multiple grinding units are distributed in a cyclic manner.

[0031] Furthermore, the polishing belt 30 also includes a base belt 31, which has a positioning groove 310 for each polishing disc 33. An elastic band 32 is adhered to the surface of the base belt 31, and multiple polishing discs 33 are adhered to the outside of the elastic band 32.

[0032] In some embodiments, the base belt 31 is an annular belt made of polyester (PET) or polypropylene (PP) plastic, the elastic belt 32 is a thin belt made of rubber, and the grinding discs 33 are made of sandpaper of different grits with plastic bases. They are all fixed together by adhesive bonding. In the initial state, the grinding discs 33 are attached to the surface of the base belt 31 under the action of the elastic belt 32, and multiple grinding discs 33 are at the same height. When it is necessary to use grinding discs 33 of different grits to grind the workpiece, the drive roller 40 lifts the grinding disc 33 of the corresponding grit from the inside to the outside through the positioning groove 310, so that the grinding disc 33 of the corresponding grit is higher than the grinding discs 33 of the other grits. In this way, the grinding disc 33 of the set grit can be controlled to contact the workpiece for grinding.

[0033] Furthermore, there is a gap channel 330 between any two adjacent grinding discs 33, so that the residue during the grinding process can be discharged from the gap channel 330 between the grinding discs 33, avoiding the residue of particles between the polishing belt 30 and the workpiece, which would cause secondary scratches.

[0034] Taking the polishing of metal workpieces as an example, which requires polishing belts with three different grit numbers, a corresponding polishing unit has three polishing areas with three different grit numbers, namely three polishing discs 33, including the first polishing disc 331, the second polishing disc 332 and the third polishing disc 333, with the grit number of the first polishing disc 331, the second polishing disc 332 and the third polishing disc 333 increasing sequentially.

[0035] like Figure 3 , Figure 4 , Figure 5 and Figure 6As shown, the drive roller 40 includes a roller body 41 and a ring sleeve 42 that is fitted around the outside of the roller body 41. One end of the roller body 41 is provided with a roller cavity 400, which is an open structure. The other end of the roller body 41 is fixedly provided with a drive shaft 411. The output end of the driver 70 is connected to the drive shaft 411 and can drive the drive shaft 411 to rotate, causing the roller body 41 to rotate as a whole. A support shaft 412 is provided inside the open end of the roller cavity 400. The support shaft 412 is connected to the roller body 41 by a bearing. The end of the support shaft 412 is fixed to the inner wall of the movable box 22. Thus, when the driver 70 drives the roller body 41 to rotate, the roller body 41 rotates outside the support shaft 412, and the support shaft 412 is partially fixed relative to the movable box 22.

[0036] Furthermore, the ring 42 is provided with multiple equidistant positioning strips 44 along the circumferential direction. The spacing of the positioning strips 44 is consistent with the spacing of the grinding discs 33, and the multiple positioning strips 44 together constitute at least one set of positioning units. The number and position of the positioning strips 44 in each set of positioning units correspond one-to-one with the number and position of the grinding discs 33 in the grinding unit. When the drive roller 40 drives the polishing belt 30, the positioning unit corresponds to the position of the grinding unit.

[0037] In some embodiments, taking the polishing of metal workpieces requiring three different grit polishing belts as an example, a corresponding positioning unit has three positioning strips 44. The three positioning strips 44 correspond to the first polishing disc 331, the second polishing disc 332, and the third polishing disc 333, respectively, including the first positioning strip 441, the second positioning strip 442, and the third positioning strip 443. The first positioning strip 441, the second positioning strip 442, and the third positioning strip 443 are located inside the first polishing disc 331, the second polishing disc 332, and the third polishing disc 333, respectively.

[0038] Furthermore, a filling part 43 is provided between the roller body 41 and the ring sleeve 42. The filling part 43 is configured to drive the positioning strip 44 set in the positioning unit to move radially, so that the corresponding grinding disc 33 in the grinding unit contacts or de-contacts the workpiece.

[0039] Thus, the protrusion height of the corresponding positioning strip 44 can be adjusted by the filling part 43. For example, when the first positioning strip 441 in each positioning unit protrudes outward under the adjustment of the filling part 43, the corresponding first grinding disc 331 is pushed outward. Under the action of the elastic band 32, the first grinding disc 331 will be higher than the second grinding disc 332 and the third grinding disc 333. When the drive roller 40 drives the polishing belt 30, only the first grinding disc 331 will contact the workpiece. After the first grinding disc 331 has finished grinding the workpiece, the second positioning strip 442 in each positioning unit is then protruded outward under the adjustment of the filling part 43. The corresponding second grinding disc 332 is pushed outward. At this time, the second grinding disc 332 will be higher than the first grinding disc 331 and the third grinding disc 333. Only the second grinding disc 332 will contact the workpiece for grinding. After the second grinding disc 332 has finished grinding the workpiece, the third positioning strip 443 in each positioning unit is finally protruded outward under the adjustment of the filling part 43. Then the corresponding third grinding disc 333 is pushed outward. At this time, the third grinding disc 333 will be higher than the first grinding disc 331 and the second grinding disc 332. Only the third grinding disc 333 will contact the workpiece for grinding, so as to achieve grinding of the workpiece in order from low to high grit.

[0040] Furthermore, the filling portion 43 includes a filling ring 431 and an elastic filling strip 432 distributed between the positioning strip 44 and the filling ring 431.

[0041] The number of filling rings 431 is the same as the number of positioning strips 44 in each positioning unit. Multiple filling rings 431 are installed on the outside of the roller body 41 along the axial direction. The number of elastic filling strips 432 is the same as the number of positioning strips 44. Multiple elastic filling strips 432 together form an elastic filling unit corresponding to the number and position of the positioning units. Multiple elastic filling strips 432 in the same elastic filling unit are respectively connected to multiple filling rings 431.

[0042] Meanwhile, depending on the required grit number of the workpiece, a single filling ring 431 can control the corresponding position of the elastic filling strip 432 in the elastic filling unit to lift the positioning strip 44 in the positioning unit, so that the positioning strip 44 will press the grinding disc 33 of the set grit number radially outward to contact the workpiece.

[0043] Taking the polishing of metal workpieces requiring three different grit grinding belts as an example, firstly, the number of filling rings 431 is set to three, including a first filling ring 4311, a second filling ring 4312, and a third filling ring 4313. The first filling ring 4311, the second filling ring 4312, and the third filling ring 4313 are arranged sequentially in the axial direction. Three elastic filling strips 432 are set in the same elastic filling unit. The three elastic filling strips 432 include a first elastic filling strip 4321, a second elastic filling strip 4322, and a third elastic filling strip 4323. The first elastic filling strips 4321 in the multiple elastic filling units distributed in the circumferential direction are all connected to the first filling ring 4311. Correspondingly, the second elastic filling strips 4322 in the multiple elastic filling units distributed in the circumferential direction are all connected to the second filling ring 4312, and the third elastic filling strips 4323 in the multiple elastic filling units distributed in the circumferential direction are all connected to the third filling ring 4313.

[0044] Thus, by introducing or exporting filling medium into different filling rings 431, the size of the deformed part of the elastic filling strip 432 with different mesh sizes can be independently controlled, thereby adjusting the protrusion height of the corresponding positioning strip 44, and adjusting the contact between the grinding disc 33 with the workpiece according to the corresponding mesh size, so as to control the contact grinding of the workpiece by the grinding disc 33 with different mesh sizes.

[0045] In some embodiments, the ring sleeve 42 is provided with a limiting groove 420 for accommodating and allowing the positioning strip 44 to move radially. The ring sleeve 42 is constructed as two symmetrical ring sleeves. During installation, the ring sleeves 42 can engage with each other in the axial direction to restrict the entire filling portion 43 between the roller body 41 and the ring sleeve 42.

[0046] Furthermore, the elastic filler strip 432 can be made of a rubber bladder with varying thickness. The side of the elastic filler strip 432 closest to the positioning strip 44 is relatively thin and easily deformed. Therefore, the side of the elastic filler strip 432 closest to the positioning strip 44 is designated as the deformable part. The radial position of the positioning strip 44 within the limiting groove 420 can be controlled by the volume change of the deformable part.

[0047] The radial position of the positioning strip 44 within the limiting groove 420 includes a first position. When the positioning strip 44 is in the first position, the grinding disc 33 is in contact with the workpiece. When the positioning strip 44 is inside the first position, the grinding disc 33 is out of contact with the workpiece. When the positioning strip 44 is outside the first position, the contact pressure between the grinding disc 33 and the workpiece increases.

[0048] By controlling the amount of medium introduced or discharged into the elastic filler strip 432, the timing of contact between the grinding disc 33 and the workpiece can be controlled. For example, if the surface defect of the workpiece is deep, the position of the positioning strip 44 can be adjusted to protrude more, so that the grinding disc 33 contacts the workpiece with greater contact pressure. Conversely, if the surface defect of the workpiece is shallow, the position of the positioning strip 44 can be adjusted to protrude less, so that the contact pressure between the grinding disc 33 and the workpiece is reduced, thus avoiding greater damage to the workpiece. In this way, not only can the contact between the grinding disc 33 and the workpiece be controlled with different grits, but the contact pressure between the grinding disc 33 and the workpiece can also be adjusted according to the surface defect and material hardness of the workpiece, so that the grinding disc 33 grinds the workpiece with better pressure and obtains a better grinding effect.

[0049] It should be understood that the control of the grinding pressure between the grinding disc 33 and the workpiece can be adjusted multiple times based on the worker's experience to obtain a better pressure control method. Alternatively, a thin-film pressure sensor can be installed on the grinding disc 33 to quantify the pressure between the grinding disc 33 and the workpiece each time, which will make it easier for the worker to judge the pressure control during grinding.

[0050] like Figure 6 As shown, the roller cavity 400 is provided with a guide plate 45 corresponding to the number of filling rings 431. Generally, the guide plate 45 is placed at the middle position inside the corresponding filling ring 431. A mechanical seal is installed at the connection between the guide plate 45 and the roller body 41 to prevent the medium in the filling cavity 450 of the guide plate 45 from leaking when the roller body 41 and the guide plate 45 are rotatably connected.

[0051] Furthermore, the roller body 41 has multiple independent connecting holes 410 that connect the corresponding filling ring 431 to the guide plate 45. Each guide plate 45 is connected to an external pressure regulating device through a filling tube 451 to adjust the volume change of the deformed part in the elastic filling strip 432.

[0052] The guide plate 45, support shaft 412, and movable box 22 are all kept in a relatively fixed state. The roller 41 rotates outside the guide plate 45 and support shaft 412. When rotating, the connecting hole 410 is always connected to the filling cavity 450. Generally, the external pressure regulating device introduces or exports oil into the filling cavity 450 through the filling pipe 451. The oil medium in the filling cavity 450 is introduced into the filling ring 431 and elastic filling strip 432 through the connecting hole 410, and finally causes the volume of the deformed part in the elastic filling strip 432 to change.

[0053] Furthermore, the radial position of the positioning strip 44 within the limiting groove 420 also includes a second position, which is located inside the first position. When the positioning strip 44 is in the second position, the end of the positioning strip 44 is located within the positioning groove 310. At this time, the protrusion height of the positioning strip 44 is consistent with the height of the positioning groove 310. When the drive roller 40 drives the polishing belt 30 to move, the multiple positioning strips 44 and the multiple positioning grooves 310 cooperate with each other to achieve the effect of synchronous movement of the drive roller 40 and the polishing belt 30, which can avoid the phenomenon of misalignment between the polishing disc 33 and the positioning strip 44.

[0054] In order to clean the impurities remaining on the surface of the polishing belt 30 after grinding, the interior of the movable box 22 is provided with a cleaning groove 50, which is located between the driven roller 23 and the drive roller 40.

[0055] The cleaning trough 50 includes an air guide trough 51, which has a window 510 for the polishing belt 30 to pass through. The air guide trough 51 is equipped with two sets of cleaning brushes 52 distributed on the inner and outer sides of the polishing belt 30. The cleaning brushes 52 are generally bristle brushes or plastic brushes. Both ends of the air guide trough 51 are connected to air guide pipes 53, which are connected to an external circulating exhaust device. The air guide pipes 53 guide the air from the circulating exhaust device from one side into the air duct 500 in the cleaning trough 50. The airflow is perpendicular to the transmission direction of the polishing belt 30. After the cleaning brushes 52 come into contact with the surface of the polishing belt 30, the detached particulate impurities are sucked into the circulating exhaust device from the other side, thus keeping the surface of the polishing belt 30 clean and free of impurities.

[0056] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0057] The embodiments have been described above, and such description is not restrictive. The figures shown are only one embodiment, and the actual structure is not limited to this. In short, if a person skilled in the art is inspired by this description and designs a similar structure and embodiment without departing from the inventive spirit, such design should fall within the scope of protection.

Claims

1. An automatic polishing device for processing metal workpieces, characterized in that, include: Conveyor table (10) is used to transport workpieces; A grinding box (20) is disposed above the conveyor table (10); A polishing belt (30) is disposed inside the polishing box (20); A drive roller (40) is disposed inside the grinding box (20) and located on the inner side of the polishing belt (30) for driving the polishing belt (30) to polish the workpiece on the conveyor table (10); The polishing belt (30) has multiple grinding units around its outer side. Each grinding unit has multiple grinding areas with progressively increasing grit sizes. When the drive roller (40) drives the polishing belt (30) to move, the grinding area with the set grit size can come into contact with the workpiece.

2. The automatic polishing device for metal workpiece processing according to claim 1, characterized in that: The polishing belt (30) includes multiple equidistantly arranged grinding discs (33). Multiple grinding discs (33) with different mesh sizes together constitute a grinding unit. The contact surface between each grinding disc (33) and the workpiece is set as the grinding area. The mesh size of the grinding discs (33) in the same grinding unit is distributed from small to large or from large to small. The grinding discs (33) in multiple grinding units are distributed in a cyclic manner.

3. The automatic polishing device for metal workpiece processing according to claim 2, characterized in that: The drive roller (40) includes the roller body (41) and a ring sleeve (42) sleeved on the outside of the roller body (41). The ring sleeve (42) is provided with a plurality of equidistant positioning strips (44) along the circumferential direction. The spacing of the positioning strips (44) is consistent with the spacing of the polishing discs (33). The plurality of positioning strips (44) together constitute at least one set of positioning units. The number and position of the positioning strips (44) in each set of positioning units correspond one-to-one with the number and position of the polishing discs (33) in the polishing unit. When the drive roller (40) drives the polishing belt (30) to drive, the positioning unit corresponds to the position of the polishing unit. A filling part (43) is provided between the roller body (41) and the ring sleeve (42). The filling part (43) is configured to drive the positioning strip (44) set in the positioning unit to move radially, so that the corresponding grinding disc (33) in the grinding unit contacts or de-contacts the workpiece.

4. The automatic polishing device for metal workpiece processing according to claim 3, characterized in that: The filling part (43) includes a filling ring (431) and elastic filling strips (432) distributed between the positioning strips (44) and the filling rings (431). The number of filling rings (431) is the same as the number of positioning strips (44) in each group of positioning units. Multiple filling rings (431) are installed on the outside of the roller body (41) in the axial direction. The number of elastic filling strips (432) is the same as the number of positioning strips (44). Multiple elastic filling strips (432) together constitute an elastic filling unit corresponding to the number and position of the positioning units. Multiple elastic filling strips (432) in the same elastic filling unit are respectively connected to multiple filling rings (431). Depending on the required grit number of the workpiece, a single filling ring (431) can control the corresponding position of the elastic filling strip (432) in the elastic filling unit to lift the positioning strip (44) in the positioning unit, so that the positioning strip (44) will press the grinding disc (33) of the set grit number radially outward to contact the workpiece.

5. The automatic polishing device for metal workpiece processing according to claim 4, characterized in that: The ring (42) is provided with a limiting groove (420) for accommodating and allowing the positioning strip (44) to move radially. The elastic filling strip (432) is configured as a deformable part on the side near the positioning strip (44), and the radial position of the positioning strip (44) in the limiting groove (420) is controlled by the volume change of the deformable part. The positioning bar (44) has a first position in the radial position within the limiting groove (420). When the positioning bar (44) is in the first position, the grinding disc (33) contacts the workpiece. When the positioning bar (44) is inside the first position, the grinding disc (33) disengages from the workpiece. When the positioning bar (44) is outside the first position, the contact pressure between the grinding disc (33) and the workpiece increases.

6. The automatic polishing device for metal workpiece processing according to claim 5, characterized in that: The roller body (41) is provided with a roller cavity (400), and the roller cavity (400) is provided with a guide plate (45) corresponding to the number of filling rings (431). The roller body (41) is rotatably connected to the guide plate (45), and the roller body (41) is provided with a plurality of independent connecting holes (410) that connect the corresponding filling rings (431) and the guide plate (45). Each guide plate (45) is connected to an external pressure regulating device through a filling tube (451) for adjusting the volume change of the deformed part.

7. The automatic polishing device for metal workpiece processing according to claim 5, characterized in that: The polishing belt (30) also includes a base belt (31), and the base belt (31) has a positioning groove (310) for each of the grinding discs (33). An elastic band (32) is adhered to the surface of the base belt (31), and multiple grinding discs (33) are adhered to the outer side of the elastic band (32). The positioning strip (44) has a second position in the radial position within the limiting groove (420). The second position is located inside the first position, and when the positioning strip (44) is in the second position, the end of the positioning strip (44) is located within the positioning groove (310). The drive roller (40) moves synchronously with the polishing belt (30).

8. The automatic polishing device for metal workpiece processing according to claim 1, characterized in that: The polishing box (20) includes an outer box (21) and a movable box (22) located inside the outer box (21). The drive roller (40) is located inside the movable box (22) on the side close to the conveyor table (10). A driven roller (23) is rotatably installed at the top of the inner part of the movable box (22). The polishing belt (30) is sleeved on the outside of the drive roller (40) and the driven roller (23). A driver (70) for driving the drive roller (40) to rotate is provided on the outside of the outer box (21). A screw sleeve (211) is fixedly provided on the top of the outer box (21). A screw screw handwheel (60) is screwed into the screw sleeve (211). The end of the screw screw handwheel (60) is rotatably connected to the movable box (22) and the distance between the drive roller (40) and the conveyor table (10) is adjusted by the screw screw handwheel (60).

9. The automatic polishing device for metal workpiece processing according to claim 8, characterized in that: The interior of the active box (22) is provided with a cleaning groove (50), which is located between the driven roller (23) and the driving roller (40). The cleaning groove (50) includes an air guide groove (51), which has a window (510) for the polishing belt (30) to pass through. The air guide groove (51) is provided with two sets of cleaning brushes (52) distributed inside and outside the polishing belt (30). Both ends of the air guide groove (51) are connected to air guide pipes (53), which are connected to an external circulating exhaust device.

10. The automatic polishing device for metal workpiece processing according to claim 1, characterized in that: The inner side of the conveyor table (10) is provided with a conveyor belt (11) for conveying the workpiece. The conveyor belt (11) is located below the drive roller (40). The surface of the conveyor belt (11) is provided with a plurality of equally spaced limiting strips (111). The conveyor table (10) is fixedly provided with a discharge hopper (101) corresponding to the discharge end of the conveyor belt (11).

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