JP3827373B2 - Sliding brush polishing equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a sliding brush polishing apparatus used in a DC motor, a DC generator, or other rotating electrical equipment.
[0002]
[Prior art]
In direct current electric motors, direct current generators, and other direct current rotating electrical equipment, sliding brushes are used to contact the surface of a cylindrical commutator and perform rectification.
This sliding brush is manufactured by, for example, compressing and molding a carbon material into a rectangular parallelepiped shape with a press machine, and then polishing the surface in several steps.
[0003]
This type of sliding brush 1 that has been commercialized has a rectangular parallelepiped shape as shown in FIG. 7, and has a cylindrical concave curved surface 1a on its end surface, and on the opposite ridge edge of its upper surface. The shape is chamfered 1b, and a lead wire 1c is inserted on the lower surface thereof.
In order to obtain the brush 1 having such a shape, first, as shown in FIG. 8A, a carbon material is press-shaped by a powder press 11 to shape the rectangular parallelepiped brush body 1. That is, in FIG. 8A, the powdery carbon material 11e in the pressing chamber 11a is inserted between the upper mold 11b and the lower mold 11c and pressed.
[0004]
In this case, a lead wire 1c introduction hole is formed in a part of the upper die 11b, the lead wire 1c is introduced into the introduction hole 11f, and its tip protrudes from the end of the upper die 11b. .
Then, as shown in FIG. 8B, when the upper die 11b is lowered and the powdery carbon material 11e is squeezed, the lead wire 1c protruding from the end of the upper die 11b is compressed by the press machine 11. The brush body 1 is implanted by the action.
Although the upper die 11b rises after the end of the pressing, since the end of the lead wire 1c is implanted in the brush body 1, the lead wire 1c is sent out from the introduction hole as the upper die 11b rises.
Then, while cutting | disconnecting the predetermined position of the said lead wire 1c, the brush main body 1 is extruded from the pressing chamber 11a by raising the lower mold | type 11c.
[0005]
Note that triangular edges 11f are formed on both edges of the lower mold 11c as shown in FIG. 9 (a). As a result, as shown in FIG. The opposing ridge edges are chamfered 1b and molded.
[0006]
The brush body 1 thus molded is then moved to the surface polishing machine 12 as shown in FIG. 10A, and the surface polishing machine 12 performs a polishing process. The planar polishing machine 12 polishes the upper surface of the brush body 1 in a planar shape by reciprocating a cylindrical rotating grindstone 12a.
Then, as shown in FIG. 10 (b), the brush body 1 that has been surface-polished is moved to the concave curved surface polishing machine 13 while being inserted into the holder 14, and is polished by the concave curved surface polishing machine 13. Is made.
The concave curved surface polishing machine 13 polishes the cylindrical rotating grindstone 13a in contact with the end surface of the brush body 1, that is, the polishing surface side of the brush body 1 as shown in FIG. A cylindrical rotating grindstone 13a is brought into contact from the side and polished.
Thus, the end surface of the brush body 1 is provided with a concave curved surface 1a, and a product as shown in FIG. 7 is obtained through these polishing steps.
[0007]
[Problems to be solved by the invention]
By the way, the following technical problems remain in the above-described conventional molding and polishing methods.
That is, when powder pressing is first performed by a press machine, triangular rising parts are formed in advance on both edges of the lower die as shown in FIG. 9A so that the brush body is chamfered. Like to do.
However, there is a technical problem that the triangular rising portion is easily damaged by the press action, and the mold cost is increased.
[0008]
In addition, the number of equipment is increased because the surface polishing for polishing the upper surface of the brush body into a flat shape and the concave curved surface polishing for polishing the end surface of the brush body into a concave curved surface are performed separately. It had the technical problem of becoming higher.
Furthermore, it is necessary to change the work (brush main body 1) between the flat surface polishing machine and the concave curved surface polishing machine, so that there is a technical problem that setup takes time and processing accuracy is deteriorated.
[0009]
The present invention has been made to solve the technical problems of the conventional one, and provides a polishing brush polishing apparatus that is efficient and has high processing accuracy while suppressing mold cost and equipment cost. It is intended to do.
[0010]
[Means for Solving the Problems]
An apparatus for polishing a sliding brush according to the present invention, which is made to achieve the above object, includes an index table that is intermittently rotated and includes radial brush holders at intervals equal to the intermittent rotation angle; A brush supply mechanism that supplies the brush while being aligned with the brush holder; a brush position detection mechanism that is supplied by the brush supply mechanism and that detects the position of the brush to be processed held by the brush holder; and the brush holder Between the brush position detecting mechanism and the flat surface polishing / chamfering mechanism, wherein the brush holder includes a flat surface polishing / chamfering mechanism that simultaneously performs flat surface polishing and chamfering of the ridge line on one side of the held brush. reverse insertion detection mechanism workpiece brush detects whether the reverse inserted which is held, the workpiece blanking held by the brush holder A concave surface polishing mechanism for polishing the end face of the sheet to the concave curved surface, the workpiece brush held in the brush holder comprises a brush holding release mechanism for releasing the holding of the brush holder, brush by the brush holding opening mechanism When the work brush released from the holder is stored as a defective product in the brush position detection mechanism or the reverse insertion detection mechanism, it is guided to a defective product stocker different from the non-defective product.
[0011]
Further, the sliding brush polishing apparatus according to the present invention includes an index table that has intermittent rotation motion and is radially provided with brush holders at intervals equal to the intermittent rotation angle, and a brush to be processed with respect to the brush holder. A brush supply mechanism that supplies the brushes while being aligned, a brush position detection mechanism that detects the position of the work brush that is supplied by the brush supply mechanism and is held by the brush holder, and one of the work brushes that is held by the brush holder A planar polishing / chamfering mechanism that simultaneously performs planar polishing of the side surface and chamfering of the ridge line; and a brush to be processed held by the brush holder between the brush position detection mechanism and the planar polishing / chamfering mechanism. reverse insertion detection mechanism for detecting whether the reverse insertion, polishing the end face of the work brush held in the brush holder concave curved surface A concave surface polishing mechanism that, said workpiece brush held in the brush holder and the brush holder releasing mechanism for releasing the holding of the brush holder is provided, the work brush which is released from the brush holder by the brush holding opening mechanism In the polishing apparatus for a sliding brush that is guided to a defective product stocker when stored as a defective product in the brush position detection mechanism or the reverse insertion detection mechanism, the brush supply mechanism is a bowl feeder that aligns the brushes to be processed. And a chute that guides the brush to be processed aligned by the bowl feeder to the brush holder, and the chute has a bowl feeder side end perpendicular to the brush holder side end. The index table is inclined at a high position and the rotation plane of the index table is also Characterized in that it is arranged in a state inclined so as to be substantially the same angle as the inclination angle of the chute.
[0012]
The index table in the two forms described above is preferably attached so as to be attachable to and detachable from an actuator that performs intermittent rotational motion.
Further, the planar polishing / chamfering mechanism and the concave curved surface polishing mechanism each include a spindle motor and a cylindrical grindstone that is rotationally driven by the spindle motor, and the cylindrical grindstone approaches or retracts from the index table. It is desirable to be configured to slide on the slider.
[0013]
With the above configuration, the press-molded brush main body is sequentially supplied to the index table side by the brush supply mechanism, and is held by the brush holder disposed on the index table, so that intermittent rotational motion is sequentially performed.
A series of necessary polishing processes are performed on the brush to be processed by the brush position detecting mechanism, the flat surface polishing / chamfering mechanism, and the concave curved surface polishing mechanism arranged at intervals equal to the intermittent rotation angle, and the brush holding / release mechanism The workpiece brush is removed from the brush holder to be a finished product.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
DESCRIPTION OF EMBODIMENTS Hereinafter, a sliding brush polishing apparatus according to the present invention will be described based on embodiments shown in the drawings.
First, FIG. 1 is a perspective view showing the basic configuration of the first embodiment of the present invention. As shown in FIG. 8, this sliding brush polishing apparatus 100 is continuously provided in necessary portions with respect to a rectangular parallelepiped brush 1 obtained by press-forming a carbon material with a powder press 11. It is configured so that it can be polished.
[0015]
In FIG. 1, a brush supply mechanism 22 is disposed on a base board 21 having a flat upper surface. The brush supply mechanism 22 includes a vibration type bowl hopper feeder (hereinafter referred to as a bowl feeder) 23 and a straight-ahead vibration feeder (hereinafter referred to as a straight-ahead feeder) 24 connected to the bowl feeder 23.
The bowl feeder 23 aligns the work brush 1 stored in the bowl 23a by vibration applied by a vibration unit (not shown) stored in a pedestal 23b that supports the bowl 23a on the base board 21. Is.
Further, the linear feeder 24 is an index table which will be described later with the brushes 1 aligned by vibration applied by a vibration unit (not shown) housed in a pedestal 24a that supports the linear feeder 24 on the base board 21. It acts to supply to the side.
[0016]
On the other hand, a disc-shaped index table 25 is arranged on the base board 21 so as to be adjacent to the brush supply mechanism 22 on the supply side of the workpiece brush 1 of the linear feeder 24.
The index table 25 is configured to be intermittently rotated by a six-divided index unit as an actuator (not shown) mounted inside the base board 21.
On the index table 25, six brush holders 26 are provided radially at intervals of 60 degrees, and the index table 25 is rotated counterclockwise (in the direction of arrow A in the figure) by 60 degrees by the six-divided index unit. Each intermittent rotation motion is performed.
[0017]
Each of the brush holders 26 has a forked shape in which each brush holding portion is formed in a bifurcated shape, and the brush 1 to be processed has a rectangular parallelepiped shape by an expanding action by a coiled spring 26a. It is comprised so that it can hold | maintain by pinching from both outer sides.
A groove-like notch 25a for guiding the lead wire 1c extending from the brush body 1 held by the brush holder 26 is provided at a position where each brush holder 26 of the index table 25 is disposed. Yes.
[0018]
On the base board 21, a brush position detecting mechanism 27, a flat surface polishing / chamfering mechanism 28, a concave curved surface polishing mechanism 29, and a brush holding / releasing mechanism 30 are provided at intervals of 60 degrees so as to surround the index table 25. Is arranged.
That is, the brush body 1 held by the brush holder 26 is supplied with a feed position P1, a detection position P2, a surface polishing / chamfering position P3, a concave curved surface polishing position P4, as shown in FIG. The brush holding / releasing position P5 is passed.
[0019]
The brush position detection mechanism 27 includes a sensor 31 and confirms whether or not the brush 1 is correctly held by the brush holder 26 by the sensor 31.
[0020]
Further, the surface polishing / chamfering mechanism 28 includes a spindle motor 32, a cylindrical grindstone 33 that is rotationally driven by the spindle motor 32, and a slider that guides the cylindrical grindstone 33 so as to approach or retract from the index table 25. The spindle motor 32 is mounted on the slider 34 so as to be slidable.
[0021]
FIG. 3A shows the configuration of the spindle motor 32 that constitutes the surface polishing / chamfering mechanism 28 and the cylindrical grindstone 33 that is rotationally driven by the spindle motor 32.
In particular, inclined end surfaces 33b of approximately 45 degrees are provided on both ends in the axial direction of the cylindrical portion 33a of the cylindrical grindstone 33 so as to rise to both outer sides. The cylindrical portion 33a and the inclined surface 33b allow A planar polishing of one side surface (upper surface) of the processing brush 1 and a chamfering process are simultaneously performed on the opposing ridge edges.
[0022]
Similarly, the concave curved surface polishing mechanism 29 also has a spindle motor 35, a cylindrical grindstone 36 that is rotationally driven by the spindle motor 35, and a slider that guides the cylindrical grindstone 36 so that it can approach or retract from the index table 25. 37. The spindle motor 35 is attached so as to be slidable on the slider 37. The spindle motor 35 constituting the concave curved surface polishing mechanism 29 and the cylindrical grindstone 36 that is rotationally driven by the spindle motor 35 are configured as shown in FIG. 3B, and FIG. Similarly to the state shown in FIG. 2, the cylindrical portion 36a of the cylindrical grindstone 36 contacts the end surface of the brush 1 to be processed and polishes the end surface of the brush 1 to be processed. As a result, the end surface of the brush body 1 is recessed. A curved surface 1a is formed.
[0023]
Further, the brush holding / releasing mechanism 30 releases the holding state of the workpiece brush 1 held by the brush holder 26. An air blow 38 for sending the brush 1 released from the holding state out of the apparatus 100 is arranged.
[0024]
In the above configuration, when the brush 1 to be processed is put into the bowl 23 a of the brush supply mechanism 22, the brush 1 is aligned by the bowl feeder 23 and supplied to the brush holder 26 disposed on the index table 25 via the linear feeder 24. Is done.
At this time, the lead wire 1c implanted in the workpiece brush 1 is guided by a notch 25a provided in the index table 25, and the brush holder 26 holds the brush 1 by a spring force.
[0025]
When the index table 25 performs an intermittent rotation motion of 60 degrees, the brush 1 moves to the brush detection mechanism 27 while being held by the brush holder 26. Here, it is confirmed by the sensor 31 whether or not the brush 1 is held in the brush holder 26 at a correct position.
[0026]
Then, when the index table 25 next makes an intermittent rotational movement of 60 degrees, the brush 1 is moved to the planar polishing / chamfering mechanism 28 while being held by the brush holder 26. Here, as described above, the cylindrical grindstone 33 having an inclined surface 33b inclined by about 45 degrees is attached to the spindle motor 32 so as to be rotationally driven, and the spindle motor 32 reciprocates on the slider 34. As a result, the upper surface of the brush is ground and chamfered.
Although not shown in the drawings, operations such as cutting and feeding necessary for processing are automatically given by an actuator disposed in the base board 21, and after polishing the brush 1 to be processed, the spindle motor 32 is It returns to the original position and enters a standby state.
[0027]
Further, when the index table 25 next performs an intermittent rotational movement of 60 degrees, the brush 1 moves to the concave curved surface polishing mechanism 29 while being held by the brush holder 26. Here, a cylindrical grindstone 36 is attached to the spindle motor 35 so as to be rotationally driven, and the spindle motor 35 moves on the slider 37 toward the index table 25 to polish the end face of the brush 1.
Although not shown in the drawings, operations such as cutting and feeding necessary for processing are automatically given by an actuator disposed in the base board 21, and after polishing the brush 1 to be processed, the spindle motor 35 is It returns to the original position and enters a standby state.
[0028]
Then, when the index table 25 next performs an intermittent rotational motion of 60 degrees, the brush 1 moves to the brush holding / releasing mechanism 30 while being held by the brush holder 26. When the brush holding / releasing mechanism 30 is reached, the brush 1 held by the brush holder 26 is released from the holding by the brush holder 26 and is discharged out of the apparatus by the air blow 38.
In this case, the release of the brush 1 from the brush holder 26 can be realized by, for example, expanding one of the brush holders of the brush holder 26 that is formed in a bifurcated shape by a protruding action of a rod (not shown).
[0029]
Further, when the index table 25 undergoes 60 degrees of intermittent rotational motion twice, the brush holder 26 moves to the brush supply mechanism 22 to receive a new brush, and the same polishing process as described above continues again. Implemented.
[0030]
FIG. 4 shows a state in which the index table 25 is attached. The index table 25 is attached to and detached from the six-division index unit 41 as an actuator that performs intermittent rotational motion by two screws 42. It is attached as possible.
Therefore, when the dimensions of the work brush 1 to be polished change, the two screws 42 are removed, the index table 25 is removed from the index unit 41, and the brush holder 26 corresponding to the work brushes having different dimensions is provided. By attaching the provided index table 25 to the index unit 41, the polishing apparatus can be made compatible with various types.
[0031]
FIG. 5 shows a more specific embodiment of the sliding brush polishing apparatus having the above basic configuration.
In FIG. 5, the same parts or the same function parts as those in FIGS. 1 to 4 are indicated by the same reference numerals. Therefore, detailed description thereof is omitted, and the specific configuration shown in FIG. Will be described.
[0032]
In the example shown in FIG. 5, a roller 51 with a rubber ring is disposed above the linear feeder 24 in the brush supply mechanism 22. The roller 51 is configured to forcibly feed the work brush 1 guided by the linear feeder 24 to the brush holder 26 disposed in the index table 25 by the rotation of the spindle motor 52.
[0033]
Further, the brush position detection mechanism 27 employs a movable rod as the sensor 31, and this movable rod protrudes toward the brush holder 26 so that the brush 1 is held in a correct state with respect to the brush holder 26. Acts like pushing.
Then, at the same time as the workpiece brush 1 is pushed in, the position of the workpiece brush 1 is detected by the protruding amount of the movable rod, and it is confirmed whether or not the workpiece brush 1 is correctly held with respect to the brush holder 26, and the holding state. Is determined to be defective, the number of the brush holder 26 is stored and handled as a defective product later.
[0034]
Further, a reverse insertion detection mechanism 53 is disposed between the brush position detection mechanism 27 and the surface polishing / chamfering mechanism 28. The reverse insertion detection mechanism 53 detects whether or not the lead wire 1c of the workpiece 1 held by the brush holder 26 is correctly inserted into the groove-shaped notch 25a provided in the index table 25. When it is determined that the brush holder 26 is not inserted, the number of the brush holder 26 is stored, and is later handled as a defective product.
[0035]
When the brush 1 removed from the brush holder 26 in the brush holding / releasing mechanism 30 is stored as a defective product in the brush position detecting mechanism 27 or the reverse insertion detecting mechanism 53, the slider 54 moves and the brush 1 moves. It acts to guide the brush to the defective stocker 55 by its own gravity.
[0036]
When the brush position detection mechanism 27 or the reverse insertion detection mechanism 53 does not store a defective product, the slider 54 does not move, and the brush acts to be guided to the non-defective stocker 56 by its own gravity. .
In the apparatus shown in FIG. 5, a brush holder cleaning unit 57 is provided at a position where the index table 25 is further intermittently rotated by 60 degrees from the brush holding / releasing mechanism 30 and adheres to the brush holder 26 by air blow. The polishing powder is removed.
[0037]
Next, FIG. 6 is a perspective view showing the basic configuration of the second embodiment of the present invention.
In FIG. 6, the same parts or the same functional parts as those in FIGS. 1 to 4 are denoted by the same reference numerals, and therefore detailed description thereof will be omitted, and the specific structure shown in FIG. Will be described.
[0038]
In the example shown in FIG. 6, the bowl feeder portion 23 in the brush supply mechanism 22 is arranged at a higher position than the example shown in FIG. 1 and is aligned by the bowl feeder portion 23 instead of the linear feeder 24. A chute portion 61 is employed in which the workpiece brush 1 is guided relative to the brush holder 26 by its own gravity.
[0039]
Accordingly, the chute 61 is disposed so as to be inclined so that the end on the bowl feeder 23 side is higher in the vertical direction than the end on the brush holder 26 side. The rotation plane of the index table 25 is also inclined so as to be substantially the same angle as the inclination angle of the chute portion 61.
By configuring in this way, it is possible to remove the vibration unit required in the linear feeder 24 in FIG. 1, and thus simplification and cost reduction of equipment can be realized.
[0040]
【The invention's effect】
As is apparent from the above description, according to the sliding brush polishing apparatus of the present invention, the molded brush body is sequentially supplied to the index table side by the brush supply mechanism, and the brush holder disposed on the index table. Are held in order, and intermittent rotational motion is made sequentially.
A series of necessary polishing processes are performed on the brush to be processed by the brush position detecting mechanism, the flat surface polishing / chamfering mechanism, and the concave curved surface polishing mechanism arranged at intervals equal to the intermittent rotation angle, and the brush holding / release mechanism The workpiece brush is removed from the brush holder to be a finished product.
Therefore, the polishing process is continuously performed on the work brush while the index table makes a round, and the above-described continuous polishing process is performed while the process brush is sequentially supplied. It is possible to provide a uniform sliding brush with high accuracy.
In addition, it is confirmed that the present invention is 2.5 times higher in work efficiency than the conventional polishing apparatus, and it is judged that the contribution of the present invention is extremely high in the industry.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a basic configuration of a sliding brush polishing apparatus according to a first embodiment of the present invention.
2 is a plan view for explaining an operation position for each intermittent rotation angle of an index table in the apparatus shown in FIG. 1; FIG.
3 is an enlarged perspective view showing a configuration of a planar polishing / chamfering mechanism and a concave curved surface polishing mechanism employed in the apparatus shown in FIG. 1. FIG.
4 is an exploded perspective view showing an index table attached state in the apparatus shown in FIG. 1. FIG.
FIG. 5 is a perspective view showing a more specific embodiment of the sliding brush polishing apparatus according to the present invention.
FIG. 6 is a side view showing a basic configuration in a second embodiment of a sliding brush polishing apparatus according to the present invention;
FIG. 7 is a perspective view showing an external configuration of a sliding brush that has been polished.
FIG. 8 is a process diagram illustrating a conventional sliding brush forming process.
FIG. 9 is a diagram showing a lower mold used in a conventional sliding brush molding process, and a diagram showing a molded sliding brush.
FIG. 10 is a process diagram illustrating a conventional polishing process.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Brush 1a Concave curved surface 1b Chamfering processing part 1c Lead wire 11 Powder press machine 21 Base board 22 Brush supply mechanism 23 Bowl feeder 24 Straight advance feeder 25 Index table 26 Brush holder 27 Brush position detection mechanism 28 Planar grinding and chamfering processing mechanism 29 Concave Curved surface polishing mechanism 30 Brush holding and releasing mechanism 32 Spindle motor 33 Cylindrical grindstone 34 Slider 35 Spindle motor 36 Cylindrical grindstone 37 Slider 38 Air blow 41 Index unit (actuator)
42 Screw 61 Chute 100 Polishing Device

Claims (4)

An index table that has intermittent rotational motion and is provided with brush holders radially at intervals equal to the intermittent rotational angle;
A brush supply mechanism for supplying a work brush while aligning it with the brush holder;
A brush position detection mechanism that detects the position of the workpiece brush that is supplied by the brush supply mechanism and held by the brush holder;
A surface polishing and chamfering mechanism for simultaneously performing surface polishing and chamfering of the ridge line of one side of the brush to be processed held by the brush holder;
A reverse insertion detection mechanism for detecting whether the brush to be processed held by the brush holder is reversely inserted between the brush position detection mechanism and the surface polishing / chamfering mechanism;
A concave curved surface polishing mechanism for polishing the end surface of the brush to be processed held by the brush holder into a concave curved surface;
A brush holding and releasing mechanism that releases the workpiece brush held by the brush holder from the holding of the brush holder;
If the work brush released from the brush holder by the brush holding and releasing mechanism is a defective one stored and stored in the brush position detecting mechanism or reverse insertion detecting mechanism, the defective stocker A sliding brush polishing apparatus characterized by being guided by: An index table that has intermittent rotational motion and is provided with brush holders radially at intervals equal to the intermittent rotational angle;
A brush supply mechanism for supplying a work brush while aligning it with the brush holder;
A brush position detection mechanism that detects the position of the workpiece brush that is supplied by the brush supply mechanism and held by the brush holder;
A surface polishing and chamfering mechanism for simultaneously performing surface polishing and chamfering of the ridge line of one side of the brush to be processed held by the brush holder;
A reverse insertion detection mechanism for detecting whether the brush to be processed held by the brush holder is reversely inserted between the brush position detection mechanism and the surface polishing / chamfering mechanism;
A concave curved surface polishing mechanism for polishing the end surface of the workpiece brush held by the brush holder into a concave curved surface;
A brush holding / releasing mechanism for releasing the workpiece brush held by the brush holder from the holding of the brush holder;
Polishing apparatus for sliding brush guided to defective product stocker when brush to be processed released from brush holder by brush holding / release mechanism is stored as defective product in brush position detection mechanism or reverse insertion detection mechanism In
The brush supply mechanism includes a bowl feeder portion for aligning the brushes to be processed, and a chute portion for guiding the brushes to be processed aligned by the bowl feeder portion with respect to the brush holder. The feeder side end is inclined with respect to the brush holder side end so as to be at a high position in the vertical direction, and the rotation plane of the index table is also substantially the same as the inclination angle of the chute portion. An apparatus for polishing a sliding brush, which is disposed in an inclined state.   The sliding brush polishing apparatus according to claim 1 or 2, wherein the index table is attached so as to be attachable to and detachable from an actuator that performs intermittent rotational motion. .   Each of the flat surface polishing / chamfering mechanism and the concave curved surface polishing mechanism includes a spindle motor and a cylindrical grindstone that is rotationally driven by the spindle motor so that the cylindrical grindstone approaches or retracts from the index table. The sliding brush polishing apparatus according to claim 1 or 2, wherein the polishing apparatus is configured to be slid on a slider.

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