CN214923190U - Self-adaptive abrasive belt polishing device - Google Patents
Self-adaptive abrasive belt polishing device Download PDFInfo
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- CN214923190U CN214923190U CN202121141774.8U CN202121141774U CN214923190U CN 214923190 U CN214923190 U CN 214923190U CN 202121141774 U CN202121141774 U CN 202121141774U CN 214923190 U CN214923190 U CN 214923190U
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- transmission shaft
- abrasive belt
- shaft
- belt wheel
- abrasive
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Abstract
The utility model discloses a self-adaptive abrasive belt polishing device, which comprises a frame, a transmission shaft, a first abrasive belt wheel, a second abrasive belt wheel, a transmission mechanism, a rotating shaft and an angular contact bearing group, wherein the transmission shaft is arranged on the frame through the angular contact bearing group; the rotating shaft is rotatably arranged on the rack, the first abrasive belt wheel is arranged on the rotating shaft, and the transmission mechanism is arranged between the rotating shaft and the transmission shaft and is used for driving the rotating shaft to rotate; the second abrasive belt wheel is rotatably installed on the rack, and the first abrasive belt wheel and the second abrasive belt wheel are parallel in rotating axis and are arranged oppositely. The utility model discloses in, self-adaptation formula abrasive band burnishing device that provides drives the transmission shaft at the in-process driving piece that polishes and rotates, and the transmission shaft passes through drive mechanism and drives the pivot and rotate and then drive first abrasive band wheel and rotate, because angular contact bearing's setting makes the pivot can swing by a small margin and then realize abrasive band self-adaptation when meetting the flat height at the abrasive band grinding in-process, guarantees the effect of polishing.
Description
Technical Field
The utility model relates to a polishing equipment technical field especially relates to a self-adaptation formula abrasive band burnishing device.
Background
The polishing device comprises a polishing wheel and an abrasive belt, wherein the abrasive belt is sleeved on two abrasive belt wheels, one of the abrasive belt wheels rotates to drive the abrasive belt to move between the two abrasive belt wheels so as to realize polishing, the conventional abrasive belt polishing device directly drives one abrasive belt wheel to rotate through a speed reduction motor, and when a plane is polished, if the plane meets the high and low surfaces of the plane, the contact area between the abrasive belt and the high and low surfaces of the plane is small, and the polishing effect is poor.
SUMMERY OF THE UTILITY MODEL
For solving the technical problem who exists among the background art, the utility model provides a self-adaptation formula abrasive band burnishing device.
The utility model provides a self-adaptive abrasive belt polishing device, which comprises a frame, a transmission shaft, a first abrasive belt wheel, a second abrasive belt wheel, a transmission mechanism, a rotating shaft and an angular contact bearing group,
the transmission shaft is arranged on the frame through an angular contact bearing set;
the rotating shaft is rotatably arranged on the rack, the first abrasive belt wheel is arranged on the rotating shaft, and the transmission mechanism is arranged between the rotating shaft and the transmission shaft and is used for driving the rotating shaft to rotate;
the second abrasive belt wheel is rotatably installed on the rack, and the first abrasive belt wheel and the second abrasive belt wheel are parallel in rotating axis and are arranged oppositely.
As the utility model discloses the scheme of further optimizing, the transmission shaft is located between first abrasive band wheel and the second abrasive band wheel.
As a further optimized proposal of the utility model, the transmission mechanism is a belt transmission mechanism.
As a further preferred embodiment of the present invention, the belt transmission mechanism includes an outer belt transmission mechanism and an inner belt transmission mechanism, and the outer belt transmission mechanism and the inner belt transmission mechanism are respectively located on both sides of the first abrasive belt wheel.
As the utility model discloses further optimized scheme still includes the crotch and takes tensioning adjusting part, and the pivot is installed on the crotch, and the crotch is installed in the frame through taking tensioning adjusting part, takes tensioning adjusting part to be used for adjusting the distance between pivot and the transmission shaft.
As the utility model discloses the scheme of further optimizing takes tensioning adjusting part to include outer axle sleeve and flange axle, and the flange axle passes through the screw thread mode and installs in the frame, and outer axle sleeve rotates and installs on the crotch, and outer axle sleeve and flange axle fixed connection rotate the flange axle and change the distance between pivot and the transmission shaft.
As the utility model discloses the scheme of further optimizing still includes mount pad and adjusting bolt, and the mount pad is fixed in the frame, and the flange axle is installed on the mount pad, adjusting bolt and the coaxial fixed connection of flange axle.
As the utility model discloses the scheme of further optimization still includes extensible member and support, and the second abrasive band wheel rotates and installs on the support, and the support passes through the extensible member to be installed in the frame, and the extensible member is used for driving the second abrasive band wheel to keeping away from or being close to first abrasive band wheel direction and removes.
As a further optimized scheme of the utility model, the device also comprises an adjusting part, a fixed sleeve and a sliding sleeve, wherein the fixed sleeve is fixed on the frame, the sliding sleeve is horizontally and slidably arranged on the frame along the axis direction of the transmission shaft, and the adjusting part is arranged on the frame and is used for driving the sliding sleeve to horizontally move;
the transmission shaft includes first transmission shaft and secondary drive axle, and first transmission shaft passes through the bearing and rotates and install in fixed sleeve, and the one end of secondary drive axle is passed through angular contact bearing group and is installed in sliding sleeve, and the coaxial slidable mounting of one end that secondary drive axle and first transmission shaft are relative is in first transmission shaft, and secondary drive axle and first transmission shaft junction have along the radial convex coupling part of first transmission shaft or secondary drive axle, and the secondary drive axle passes through drive mechanism and drives the pivot rotation.
As the utility model discloses further optimized scheme, angular contact bearing group installs the one end of keeping away from first transmission shaft at the second transmission shaft, and the other end of second transmission shaft passes through deep groove ball bearing and is connected with sliding sleeve rotation.
The utility model discloses in, self-adaptation formula abrasive band burnishing device that provides drives the transmission shaft at the in-process driving piece that polishes and rotates, and the transmission shaft passes through drive mechanism and drives the pivot and rotate and then drive first abrasive band wheel and rotate, because angular contact bearing's setting makes the pivot can swing by a small margin and then realize abrasive band self-adaptation when meetting the flat height at the abrasive band grinding in-process, guarantees the effect of polishing.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
FIG. 1 is a schematic structural view of the present invention;
fig. 2 is a sectional view of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar designations denote like or similar elements or elements having like or similar functionality throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
It will be understood that the terms "central," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in an orientation or positional relationship indicated in the drawings for convenience and simplicity of description only, and do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered as limiting the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
The self-adaptive abrasive belt polishing device shown in fig. 1-2 comprises a frame 1, a transmission shaft 2, a first abrasive belt wheel 3, a second abrasive belt wheel 4, a transmission mechanism, an adjusting piece 16, a rotating shaft 5 and an angular contact bearing group 6,
the transmission shaft 2 is arranged on the rack 1 through an angular contact bearing group 6, and further comprises an adjusting part 16, a fixed sleeve 17 and a sliding sleeve 18, the fixed sleeve 17 is fixed on the rack 1, the sliding sleeve 18 is horizontally and slidably arranged on the rack 1 along the axial direction of the transmission shaft 2, the adjusting part 16 is arranged on the rack 1 and used for driving the sliding sleeve 18 to horizontally move, and the adjusting part 16 is an electric cylinder;
the transmission shaft 2 comprises a first transmission shaft 20 and a second transmission shaft 21, the first transmission shaft 20 is rotatably installed in the fixed sleeve 17 through a bearing, one end of the second transmission shaft 21 is installed in the sliding sleeve 18 through an angular contact bearing set 6, the end of the second transmission shaft 21 opposite to the first transmission shaft 20 is coaxially and slidably installed in the first transmission shaft 20, a connecting part protruding in the radial direction of the first transmission shaft 20 or the second transmission shaft 21 is arranged at the joint of the second transmission shaft 21 and the first transmission shaft 20, the second transmission shaft 21 drives the rotating shaft 5 to rotate through a transmission mechanism, in order to ensure the transmission precision, the second transmission shaft 21 is a spline shaft, a spline hole matched with the spline shaft is formed in the first transmission shaft 20, the angular contact bearing set 6 is installed at one end of the second transmission shaft 21 far away from the first transmission shaft 20, and the other end of the second transmission shaft 21 is rotatably connected with the sliding sleeve 18 through a deep groove ball bearing, the angular contact bearing group 6 is a pair of angular contact bearings;
the rotating shaft 5 is rotatably arranged on the frame 1, the first abrasive belt wheel 3 is arranged on the rotating shaft 5, the transmission mechanism is arranged between the rotating shaft 5 and the transmission shaft 2 and is used for driving the rotating shaft 5 to rotate, the transmission mechanism is a belt transmission mechanism, the part of the second transmission shaft 21 extending out of the sliding sleeve 18 is provided with a belt wheel, the rotating shaft 5 is also provided with a belt wheel, a transmission belt is sleeved between the rotating shaft 5 and the belt wheel on the second transmission shaft 21,
the transmission mechanism is a belt transmission mechanism, the belt transmission mechanism comprises an outer belt transmission mechanism 9 and an inner belt transmission mechanism 7, and the outer belt transmission mechanism 9 and the inner belt transmission mechanism 7 are respectively positioned on two sides of the first abrasive belt wheel 3;
the sand belt grinding machine is characterized by further comprising an extensible member 14 and a support 15, wherein the extensible member 14 is an electric cylinder, the second sand belt wheel 4 is rotatably mounted on the support 15, the support 15 is mounted on the machine frame 1 through the extensible member 14, the extensible member 14 is used for driving the second sand belt wheel 4 to move in the direction away from or close to the first sand belt wheel 3, the transmission shaft 2 is located between the first sand belt wheel 3 and the second sand belt wheel 4, the rotating axes of the first sand belt wheel and the second sand belt wheel 4 are parallel, and the first sand belt wheel 3 and the second sand belt wheel 4 are arranged oppositely;
still include crotch 8 and take tensioning adjusting part, pivot 5 is installed on crotch 8, and crotch 8 installs on frame 1 through taking tensioning adjusting part, take tensioning adjusting part to be used for adjusting the distance between pivot 5 and the transmission shaft 2, take tensioning adjusting part to include outer axle sleeve 10 and flange axle 11, flange axle 11 passes through the screw thread mode and installs on frame 1, outer axle sleeve 10 rotates and installs on crotch 8, and outer axle sleeve 10 and flange axle 11 fixed connection, it changes the distance between pivot 5 and the transmission shaft 2 to rotate flange axle 11, still include mount pad 12 and adjusting bolt 13, mount pad 12 is fixed on frame 1, flange axle 11 is installed on mount pad 12, adjusting bolt 13 and the coaxial fixed connection of flange axle 11.
In the working process of the embodiment: the frame 1 is provided with a speed reducing motor, the speed reducing motor drives a first transmission shaft 20 to rotate through a belt transmission mechanism, the first transmission shaft 20 drives a second transmission shaft 21 to rotate through a spline, a transmission shaft 2 drives a first abrasive belt wheel 3 to rotate through the belt transmission mechanism, an abrasive belt is sleeved between the first abrasive belt wheel 3 and a second abrasive belt wheel 4, and an angular contact bearing is arranged, so that a fork frame 8 for installing a rotating shaft 5 can swing in a small-amplitude deflection when meeting the height of a flat plate in the grinding process, the first abrasive belt wheel 3 can be ground according to the height of the flat plate, the contact area between the abrasive belt and the height of the flat plate is increased to ensure the grinding effect, and the belt transmission mechanism between the transmission shaft 2 and the rotating shaft 5 is in a power switching mode to ensure the unpowered difference change of the abrasive belt in the grinding process, and the grinding and polishing effect is ensured.
In the present embodiment, it is preferable that the transmission shaft 2 is located between the first abrasive belt wheel 3 and the second abrasive belt wheel 4, which saves space and increases transmission efficiency.
In the present embodiment, it is preferable that the transmission mechanism is a belt transmission mechanism, which absorbs vibration to some extent to increase the grinding and polishing effect.
The existing driving abrasive belt wheel rotates by driving the rotating shaft 5 to rotate at one side of the abrasive belt wheel, because the abrasive belt wheel is in contact friction between an abrasive belt on the abrasive belt wheel and a polishing part in the rotating process, the abrasive belt wheel is stressed to enable the rotating shaft 5 to swing to a certain extent by certain force, the transmission precision and the grinding effect are influenced, the belt transmission mechanism is preferred in the embodiment and comprises an outer belt transmission mechanism 9 and an inner belt transmission mechanism 7, the outer belt transmission mechanism 9 and the inner belt transmission mechanism 7 are respectively positioned at two sides of the first abrasive belt wheel 3, the transmission precision is further increased, the transmission is relatively carried out at one side of the first abrasive belt wheel 3, the first abrasive belt wheel 3 is stressed more uniformly by the transmission of the mode, and the transmission effect is further increased.
The transmission belt with the transmission mechanism can be elongated to deform after being used for a long time, if the distance between the transmission shaft 2 and the rotating shaft 5 is not changed, the slipping phenomenon is avoided, the grinding effect is influenced, in the embodiment, the transmission belt with the transmission mechanism is preferable, the transmission belt with the transmission mechanism further comprises a fork frame 8 and a belt tensioning adjusting assembly, the rotating shaft 5 is installed on the fork frame 8, the fork frame 8 is installed on the rack 1 through the belt tensioning adjusting assembly, and the belt tensioning adjusting assembly is used for adjusting the distance between the rotating shaft 5 and the transmission shaft 2, so that the grinding effect is ensured.
In this embodiment, it is preferable that the belt tensioning adjusting assembly includes an outer shaft sleeve 10 and a flange shaft 11, the flange shaft 11 is installed on the frame 1 by a thread manner, the outer shaft sleeve 10 is installed on the fork 8 by a bearing in a rotating manner, and the outer shaft sleeve 10 is fixedly connected with the flange shaft 11, the flange shaft 11 is rotated to change the distance between the rotating shaft 5 and the transmission shaft 2, the flange shaft 11 drives the outer shaft sleeve 10 to rotate and move horizontally by rotating the flange shaft 11, and since the fork 8 is connected with the outer shaft sleeve 10 by a bearing to drive the fork 8 to move horizontally and further change the distance between the transmission shaft 2 and the rotating shaft 5, the distance between two belt wheels of the belt transmission mechanism can be adjusted conveniently, and the grinding effect can be ensured.
In this embodiment, it is preferable that the flange device further includes a mounting base 12 and an adjusting bolt 13, the mounting base 12 is fixed on the frame 1, the flange shaft 11 is mounted on the mounting base 12, the adjusting bolt 13 is coaxially and fixedly connected with the flange shaft 11, and the flange shaft 11 can be rotated by rotating the adjusting bolt 13, so that the operation is facilitated.
In order to adjust the distance between the two abrasive belts according to the length of the abrasive belt and ensure the grinding effect, in this embodiment, it is preferable that the abrasive belt grinding machine further includes an expansion piece 14 and a support 15, the second abrasive belt wheel 4 is rotatably installed on the support 15, the support 15 is installed on the frame 1 through the expansion piece 14, and the expansion piece 14 is used for driving the second abrasive belt wheel 4 to move in a direction away from or close to the first abrasive belt wheel 3.
In order to adjust the relative position relationship between the belt wheel on the second transmission shaft 21 and the belt wheel on the rotating shaft 5, in this embodiment, it is preferable that the adjusting device further includes an adjusting member 16, a fixed sleeve 17 and a sliding sleeve 18, the fixed sleeve 17 is fixed on the frame 1, the sliding sleeve 18 is horizontally slidably mounted on the frame 1 along the axial direction of the transmission shaft 2, and the adjusting member 16 is mounted on the frame 1 for driving the sliding sleeve 18 to horizontally move;
the transmission shaft 2 comprises a first transmission shaft 20 and a second transmission shaft 21, the first transmission shaft 20 is rotatably mounted in the fixed sleeve 17 through a bearing, one end of the second transmission shaft 21 is mounted in the sliding sleeve 18 through an angular contact bearing set 6, and the end of the second transmission shaft 21 opposite to the first transmission shaft 20 is coaxially and slidably mounted in the first transmission shaft 20, and the joint of the second transmission shaft 21 and the first transmission shaft 20 is provided with a connecting part protruding along the radial direction of the first transmission shaft 20 or the second transmission shaft 21, the second transmission shaft 21 drives the rotating shaft 5 to rotate through the transmission mechanism, the length of the transmission shaft 2 is changed by the expansion and contraction of the adjusting piece 16, so that the position of the belt wheel on the second transmission shaft 21 is changed to enable the belt wheel on the second transmission shaft 21 to be opposite to the belt wheel on the rotating shaft 5, thereby ensuring the transmission effect and the connection between the first transmission shaft 20 and the second transmission shaft 21 increases the grinding effect to a certain extent. In the embodiment, preferably, the angular contact bearing set 6 is installed at one end of the second transmission shaft 21 far away from the first transmission shaft 20, and the other end of the second transmission shaft 21 is rotatably connected with the sliding sleeve 18 through a deep groove ball bearing, so that the swing amplitude of the driving fork 8 is increased when the flat plate is ground, the contact area between the abrasive belt and the grinding polishing surface is further ensured, and the grinding effect is increased.
The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.
Claims (10)
1. A self-adaptive abrasive belt polishing device is characterized by comprising a frame (1), a transmission shaft (2), a first abrasive belt wheel (3), a second abrasive belt wheel (4), a transmission mechanism, a rotating shaft (5) and an angular contact bearing group (6),
the transmission shaft (2) is arranged on the rack (1) through an angular contact bearing set (6);
the rotating shaft (5) is rotatably arranged on the rack (1), the first abrasive belt wheel (3) is arranged on the rotating shaft (5), and the transmission mechanism is arranged between the rotating shaft (5) and the transmission shaft (2) and used for driving the rotating shaft (5) to rotate;
the second abrasive belt wheel (4) is rotatably installed on the rack (1), and the rotating axes of the first abrasive belt wheel and the second abrasive belt wheel (4) are parallel and the first abrasive belt wheel (3) and the second abrasive belt wheel (4) are arranged oppositely.
2. An adaptive belt sander according to claim 1, wherein the drive shaft (2) is located between the first (3) and second (4) abrasive belt wheels.
3. The adaptive belt sander of claim 1, wherein the drive mechanism is a belt drive mechanism.
4. An adaptive abrasive belt polishing device according to claim 3, characterized in that the belt drive comprises an outer belt drive (9) and an inner belt drive (7), the outer belt drive (9) and the inner belt drive (7) being located on either side of the first abrasive belt wheel (3).
5. An adaptive abrasive belt polishing device according to claim 3, characterized by further comprising a fork (8) and a belt tension adjusting assembly, the spindle (5) being mounted on the fork (8), and the fork (8) being mounted on the frame (1) via the belt tension adjusting assembly for adjusting the distance between the spindle (5) and the drive shaft (2).
6. An adaptive abrasive belt polishing device according to claim 5, characterized in that the belt tensioning adjustment assembly comprises an outer sleeve (10) and a flange shaft (11), the flange shaft (11) is threadedly mounted on the frame (1), the outer sleeve (10) is rotatably mounted on the fork carriage (8), and the outer sleeve (10) is fixedly connected to the flange shaft (11), and rotating the flange shaft (11) changes the distance between the rotary shaft (5) and the drive shaft (2).
7. An adaptive abrasive belt polishing device according to claim 6, characterized by further comprising a mounting base (12) and an adjusting bolt (13), wherein the mounting base (12) is fixed on the frame (1), the flange shaft (11) is mounted on the mounting base (12), and the adjusting bolt (13) is coaxially and fixedly connected with the flange shaft (11).
8. An adaptive abrasive belt polishing device according to claim 1, further comprising a telescopic member (14) and a bracket (15), wherein the second abrasive belt wheel (4) is rotatably mounted on the bracket (15), the bracket (15) is mounted on the frame (1) through the telescopic member (14), and the telescopic member (14) is used for driving the second abrasive belt wheel (4) to move away from or close to the first abrasive belt wheel (3).
9. An adaptive abrasive belt polishing device according to claim 1, further comprising an adjusting member (16), a fixed sleeve (17) and a sliding sleeve (18), wherein the fixed sleeve (17) is fixed on the frame (1), the sliding sleeve (18) is horizontally slidably mounted on the frame (1) along the axial direction of the transmission shaft (2), and the adjusting member (16) is mounted on the frame (1) and used for driving the sliding sleeve (18) to horizontally move;
transmission shaft (2) include first transmission shaft (20) and second transmission shaft (21), first transmission shaft (20) are passed through the bearing and are rotated and install in fixed sleeve (17), the one end of second transmission shaft (21) is passed through angular contact bearing group (6) and is installed in sliding sleeve (18), and second transmission shaft (21) and the coaxial slidable mounting of the one end relative of first transmission shaft (20) are in first transmission shaft (20), and second transmission shaft (21) and first transmission shaft (20) junction has along first transmission shaft (20) or the radial convex coupling part of second transmission shaft (21), second transmission shaft (21) pass through drive mechanism and drive pivot (5) and rotate.
10. An adaptive abrasive belt polishing device according to claim 9, characterized in that the angular contact bearing set (6) is mounted on the end of the second transmission shaft (21) remote from the first transmission shaft (20), the other end of the second transmission shaft (21) being rotationally connected to the sliding sleeve (18) by means of a deep groove ball bearing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121141774.8U CN214923190U (en) | 2021-05-25 | 2021-05-25 | Self-adaptive abrasive belt polishing device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121141774.8U CN214923190U (en) | 2021-05-25 | 2021-05-25 | Self-adaptive abrasive belt polishing device |
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| CN214923190U true CN214923190U (en) | 2021-11-30 |
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| CN202121141774.8U Active CN214923190U (en) | 2021-05-25 | 2021-05-25 | Self-adaptive abrasive belt polishing device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113118930A (en) * | 2021-05-25 | 2021-07-16 | 安徽鑫艺达抛光机械股份有限公司 | Self-adaptive abrasive belt polishing device |
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2021
- 2021-05-25 CN CN202121141774.8U patent/CN214923190U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113118930A (en) * | 2021-05-25 | 2021-07-16 | 安徽鑫艺达抛光机械股份有限公司 | Self-adaptive abrasive belt polishing device |
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