JPH03294167A - Polishing device - Google Patents

Abstract

PURPOSE:To easily obtain a work face of high flatness, by composing it so as to renew an abrasive grain fitting face by a polishing operation part with a polishing tape being linearly held by a tape receipt support part and with the polishing tape being gradually moved simultaneously with its rotating together with a installed rotating frame while strongly bringing it into contact wit the face to be polished. CONSTITUTION:In case the device which handles a work with large faces to be polished, the device supporting a rotating frame 10 is arranged shiftably both in the lateral direction and in the vertical direction. Then, a polishing tape 40 is rotated together with the rotating frame 10 while slowly moving it to a winding reel 42 from a delivery reel 41 and the polishing tape 40 whose back face is held by the tape receipt support part provided at the free end side of the rotating frame 10 is brought into contact with the face to be worked of the work by an adequate pressing force. In this case, the contact part of the polishing tape 40 is polished by its movement to an optional position while rotating the rotating shaft crossed with the work face under constant conditions.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention is a polishing bag that uses a tape to which fine grain abrasive material is attached to finish polishing! Regarding.

(Prior technology) Recently, polishing tapes made of synthetic resin films with fine abrasive grains attached to their surfaces have been used to finish parts of precision equipment that require high polishing accuracy. ing. In order to polish a workpiece (hereinafter simply referred to as a workpiece) using this polishing tape, the polishing tape is usually run at a relatively slow speed to renew the grinding edge of the attached abrasive grains while polishing the workpiece. The surface is rotated and polished.

(Problem to be Solved) In conventional methods, the workpiece is rotated, so if the machined surface of a small workpiece is small, contact with the polishing surface of the polishing tape will be localized, resulting in waste. Further, in the case of a workpiece having a wide surface to be machined, it is necessary to rotate the workpiece at a high speed and to perform the machining process while swinging the workpiece as necessary, which increases the driving force of the workpiece. In particular, when the surface to be processed is wide, the locus during polishing becomes constant, resulting in fine polishing marks. Of course, this is a relative issue, but if you try to increase the polishing efficiency, the contact pressure between the polishing tape and the workpiece surface will inevitably increase, which will increase the wear and tear of the polishing tape and make it more likely that the polishing marks mentioned above will appear. Become.

It is an object of the present invention to solve these problems and provide an apparatus that can economically perform precision polishing by minimizing wear on the polishing tape and increasing polishing efficiency.

(Means for Solving the Problems) That is, the present invention includes a rotary frame that is rotatable with a rotary shaft at its base end, and two rotary frames that are arranged parallel to the rotary frame at a predetermined interval along the rotary axis. An abrasive tape reel mounting shaft on a shaft, an abrasive tape feeding reel and an abrasive tape take-up reel that are removably attached to each of the reel mounting shafts, and the abrasive tape is run and the rotating frame is rotated. A drive mechanism is provided, and power is transmitted from a drive motor to the take-up reel attachment shaft via the drive mechanism, and the abrasive tape is attached to the end of the abrasive tape feed-out reel attachment shaft. A brake mechanism is attached to apply tension to the abrasive tape, and the abrasive tape is transferred from the feed reel to the take-up reel via a tape feed roller that rotates within the frame, around the abrasive tape receiving portion provided on the free end side of the rotating frame. The rotary frame is supported on the polishing machine body so that the polishing surface of the workpiece can come into contact with and be separated from the polishing tape at a position facing the receiving portion of the polishing tape.

Each reel mounting shaft of the abrasive tape incorporated in the rotating frame in the present invention has, for example, an intermediate portion omitted and a reel mounting face plate fixed to one shaft end inside the rotating frame, and a reel presser ring fixed to the other shaft end. A plate is rotatably attached, and the shaft portion on the side provided with the reel presser disk is screwed into the rotating frame as a threaded shaft, and is moved forward and backward by rotational operation from the outside. The reel can be attached to and detached from the reel attachment shaft.6 Each reel attachment shaft is not divided into one shaft, and one side of the rotating frame is open to allow the reel attachment shaft of the abrasive tape. It can also be made detachable.

In addition, the shaft end of each of the reel mounting shafts on the side where the reel mounting face plate is provided is equipped with a payout speed adjustment mechanism by external screw adjustment for the payout reel mounting shaft, and a mechanism for adjusting the feeding speed by external screw adjustment for the take-up reel mounting shaft. The rotational force of the power transmission gear is transmitted to the reel mounting shaft via the braking mechanism, so that the rotational speed can be automatically adjusted according to the amount of winding of the polishing tape.

Furthermore, in the present invention, for polishing relatively small workpieces,
It is advisable to arrange a workpiece support device at a position offset by an appropriate amount from the rotation axis of the rotating frame so that the workpiece faces the workpiece, so that the entire polishing tape in the width direction can come into contact with the workpiece. For polishing large area workpieces, the device supporting the rotating frame can move in three dimensions, rotating the rotating frame while running the polishing tape, and moving the machined surface in any direction. It is preferable to allow the abrasive tape to make contact over a wide area.

Furthermore, in the present invention, the end face of the rotary frame is made perpendicular to the rotation axis, or the end face of the rotary frame is disposed at the end of the rotary frame as a tape receiving portion for maintaining the contact force of the abrasive tape against the surface to be processed. You can choose whether to maintain the linear support state by the supported support rollers.

(Function) In the device of the present invention configured as described above, when the abrasive tape is attached during use, the feed reel on which the abrasive tape is wound inside the rotating frame is attached to one reel attachment shaft. The take-up reel is attached to the other reel attachment shaft, and the abrasive tape is passed from the pay-out reel to the outside of the tape receiving part of the rotating frame, and then around the tape feed roller attached to the rotating frame, and the abrasive tape is taken up by a drive mechanism. Allow it to be wound onto the reel.

When polishing a workpiece, when the drive motor is started, power is transmitted to the polishing tape drive mechanism built into the frame of the rotating frame, and the polishing tape is removed by the take-up reel via the take-up reel mounting shaft. is wound up.

Therefore, in the case of a device that handles small workpieces, the contact value 1 of the workpiece is placed eccentrically with respect to the rotation axis of the rotating frame, and, for example, a pressing force is applied from the workpiece side to the polishing tape surface in the polishing operation section. Then, the surface of the workpiece to be polished is supported by the tape support part, and the polishing tape rotates in a constant posture and comes into contact with the surface of the workpiece to be polished, and at the same time it moves little by little. Polishing is performed while the abrasive grains attached to the polishing tape are gradually renewed.

The polishing tape whose abrasive grains have been worn out by the polishing operation is sequentially sent to a take-up reel by a tape feed roller and wound up. In addition, on the feed-out reel side, a brake mechanism attached to the feed-out reel attachment shaft acts so that the abrasive tape is fed out in response to the tensile force of the tape feed roller, and work is performed without excessively feeding out the abrasive tape. . Furthermore, if an attached braking mechanism is installed on the take-up reel mounting shaft, the speed at which the tape is fed by the tape feed roller in the tape winding direction will increase as the diameter of the used portion of the tape increases. However, as the winding diameter of the take-up reel increases, the tape winding speed increases, but this can be compensated for by slipping in response to changes in the tension generated on the abrasive tape, allowing smooth winding. It becomes like this.

If the polishing surface of the workpiece is small, if the tape receiving part of the rotating frame is made flat, the surface of the workpiece can be polished over a wide range at one time, and the workpiece can be finished in a short time.

In the case of a device that handles workpieces with a wide surface to be polished, the device that supports the rotating frame should be movable laterally and vertically, and the polishing tape can be fed out and reeled in the same way as the device described above. The abrasive tape is gradually moved from the tape to the take-up reel and rotated together with the rotating frame, and the back side of the abrasive tape is held by the tape receiving part provided at the free end of the rotating frame, and the tape is brought into contact with the workpiece surface with a moderate pressing force. The workpiece is held stationary except when necessary, and polishing can be carried out by moving the contact portion of the polishing tape to any desired position under certain conditions while rotating it around a rotating shaft that intersects the surface to be processed. In this type of method, the contact resistance of the polishing part can be reduced by using a roller as a receiving part for the polishing tape, and by arranging the contact between the polishing tape and the processed surface in a line or a narrow surface. Since the polishing abrasive grains are continuously updated, by maintaining constant pressure conditions, it has become possible to polish with high precision in a short time.

(Example) The polishing apparatus of the present invention will be described in detail below with reference to embodiment figures.

What is shown in FIGS. 1 to 4 is a polishing apparatus of the present invention intended for small-sized workpieces. This polishing device includes a rectangular rotating frame 10 having a rotating shaft 11 at the base end, a feed-out reel mounting shaft 20 and a take-up reel mounting shaft 30 arranged at a required interval on this rotating frame 10, and The take-up reel mounting shaft 30 and tape feed rollers 45 and 46 arranged in parallel thereto, and the tape feed roller 4
5.46 and a drive mechanism 50 for driving the abrasive tape to the take-up reel attachment shaft 30, a pair of feed-out reels 41 and their take-up reels 42 around which the abrasive tape 40 of the required width is wound, and a support mechanism 70 for the workpiece. , and a machine stand 1 for mounting and supporting these parts.

As shown in FIG. 1, the rotating frame 10 is rotatably supported in a cantilevered manner via rolling bearings at a bearing portion 2 erected on a machine base 1, and rotates as a whole with reference to a rotational axis a. It looks like this. The frame body 12 portion of the rotary frame 10 has two open sides, and is formed in such a size that the take-up reel 42 of the polishing tool 140 and the feed-out reel 41 around which the polishing tape 40 is wound can be accommodated. Bearings 13, 1 are mounted on one side plate portion 12' at predetermined intervals on the side portion.
3, screw holes 14.i4 are provided in the other side plate portion 12'' so that their opposing axes coincide with each other.The outer end surface of the free side end is a flat surface perpendicular to the rotational axis a, This outer end surface forms an abrasive tape receiving surface 15.

The feed-out reel mounting shaft 20 and the take-up reel mounting shaft 30 of the polishing tape 40 are both supported by a reel mounting face plate 22 attached to the inner end with the intermediate portion omitted.
21 (support main shaft 31 with reel mounting face plate 32 attached to the inner end), and a reel presser disc 2 at the inner end opposite to this.
4 or 34 is rotatably attached to the frame body 12 of the rotating frame 10, and a push screw shaft 23 or 33, which is screwed into the screw hole 14, is disposed on the same axis. A disc brake is attached to the outer end of the main support shaft 21 of the rolling a-sole attachment n20 as a rolling ratio speed adjusting mechanism 25. This feed-out speed regulator 11125 includes a face plate 26 at the end of the main support shaft 21, a cover 28 fixed to the outer surface of the frame body 12, and a brake plate 27 which cannot be rotated through a bin 27' arranged opposite to each other. The disc spring 29 is pressed from the outside by a push bolt 29', and the braking force can be adjusted by adjusting the force.

Further, a driving force transmission gear 35 is loosely supported on the outer protruding portion of the support main shaft 31 of the take-up reel mounting shaft 30, and brake discs 3636 are disposed on both sides of this driving force transmission gear 35. Nand 37 screwed into the end thread part
brake disc 36 through two disc springs 37°.
36 and the transmission gear 35 by adjusting the contact friction force between the supporting main f
The rotational force transmission to II31 can be adjusted. 23', 33' are rotation handles of the screw shaft 23.33;
23" and 33" are lock nuts.

The polishing tape 40 is made of a synthetic resin film, for example, a polyester film, with fine abrasive grains attached to the surface.The polishing tape 40 is sandwiched between the mounting face plate 22 and the presser disk 24 of the feed-out reel mounting shaft 20 described above, and then a feed-out rule 41 for the polishing tape 40 that is attached so that the centers match;
It is wound around a take-up reel 42 attached to the take-up reel mounting shaft 30 in the same manner as this feed-out reel 41, and is moved from the feed-out reel 41 to the take-up reel 42 to be wound up. ing. In addition, both reels 41
．． 42 have holes 41' and 42' on their sides that engage with the pins 22' and 32' provided on the mounting face plate 22 and 32, and rotational force is generated by engagement with the pins 22' and 32°. It is meant to be transmitted.

At a position close to the take-up reel mounting shaft 30, two tape feed rollers 45 and 46 are mounted on the frame 1, as shown in FIG.
2 is arranged in the inner space.

A drive mechanism 50 for the take-up reel mounting shaft 30 and each tape feed roller 45, 46, and for the frame 12.
From two gears 51 and 52 arranged in a row on the output shaft 3 of the motor 3 mounted on the machine base 1, one gear 51 is attached to the gear 53 attached to the rotation shaft 11 of the rotation frame 10,
The other gear 52 meshes with a gear 54 fixed to the outer end of a drive shaft 55 disposed passing through the center of the rotating shaft 11 of the rotating frame 10, so that the driving force is transmitted in a branched manner. ing. The take-up reel mounting shaft 30 is attached to the bevel gear 56 of the drive shaft 55 that protrudes inside the frame 12.
A bevel gear 56'' on an intermediate drive shaft 57 installed parallel to the
A fixed gear 58 is engaged with the above-mentioned driving force transmission gear 35 at the outer protruding end of one frame 12 of the intermediate drive shaft 57 so that power is transmitted to the take-up reel mounting shaft 30. be. A gear 59 fixed to the intermediate drive shaft 57 within the frame 12 is connected to the - tape feed roller II! The tape feed roller shaft 45' and the other tape feed roller shaft 46' mesh with a gear 61 fixed on the tape feed roller 45', and the tape feed roller shaft 45' and the other tape feed roller shaft 46' are connected to both tape feed rollers by gears 62 and 63 on the outside of the frame 12. 45°46 rotates at a constant speed. 64.65 is a bearing.

The workpiece support mechanism 70 is erected at appropriate intervals on the free end side of the rotating frame 10 described above, and the workpiece A supported by this support mechanism 70 is perpendicular to the rotation axis of the rotating frame 10. It is configured to be located eccentrically on the surface. Reference numeral 71 denotes a support frame, on which a support body 73 of a work holder 75 is attached so as to be slidable in the vertical direction along a support seat 72 on the front side.

A crank arm 77 operated by a deceleration motor 76 mounted on a bracket 74 at the top of the support frame 71
It is suspended by. The workpiece holder 75 is designed so that the workpiece A can be attached and fixed to its head 75' portion, and the rod portion 75'' can be moved back and forth by two arms 73' extending parallel to the support body 73 at an angle of 73°. 78 is a collar, 78゛ is a spring for pressing the work toward the polishing side, and 75a is a handle for moving the work holder 75 forward and backward.The work holder 75 can be moved backward by operating the handle 75a. A temporary locking mechanism (not shown) is provided to facilitate workpiece replacement.

Reference numeral 80 denotes a cover, which is provided so as to be removable as a whole or on one side. Reference numeral 81 denotes a protection plate, and a through hole 82 is provided in the portion into which the workpiece A is inserted.

According to the apparatus of the present invention configured in this way, in use, the polishing tape 40 is passed around the outside of the tape receiving surface 15 formed at the end of the frame 12 of the rotating frame 10 from the feed reel 41 attached to the rotating frame 1o, Further, the tape is wound around the tape feed rollers 45 and 46 so as to be wound onto the take-up reel 42 (see FIG. 2).

In this state, start the motor 3 and rotate the rotating frame 10 to 1
The tape is rotated at a speed of about 00r, p, and m, and the tape is moved at a slow speed of about 10 to 30m+++/win). When operated in this way, the polishing tape 4
゜ is a flat polishing part that rotates by the tape support surface 15 at the end of the rotating frame 10, so when the workpiece A is held and pressed against this by the workpiece holder 75, the center of rotation of the polishing part, i.e. rotating frame 1
The surface of the workpiece A, which is located eccentrically from the center of rotation at 0, is polished using approximately the remaining width of the polishing tape having a predetermined width of 4 degrees. However, since the abrasive tape 40 is gradually moved and wound, the abrasive grains are sequentially updated and polished (grinded), which increases the cost of the abrasive tape 40 as the abrasive grains wear out. Occurrence of clogging between abrasive grains can be prevented, and a decrease in polishing efficiency can be prevented. The polishing chip 140 with worn abrasive grains is drawn toward the take-up reel 42 by the tensile force of the tape feed roller 4546. Since the polishing tape 40 is fed out while being subjected to an appropriate braking force by the speed adjustment mechanism 25, the polishing tape 40 can be moved without sagging on the polishing operation surface. When the polishing tape take-up reel 42 winds up the portion of the polishing tape 40 whose polishing surface has become used by the power provided by the drive mechanism 50, tape feed rollers 45 and 4
The take-up reel 4 on the take-up reel mounting shaft 30 is set in advance so that the abrasive tape 4o, which is being moved at a constant speed by the take-up reel 6, rotates faster than the moving speed.
2 and the tape feed roller 46, when the tensile force generated on the abrasive tape 40 to be wound becomes large, the brake disc 36 is
Since the frictional transmission torque between the abrasive tape 40 and the transmission gear 35 exceeds the set value, the abrasive tape 40 is automatically adjusted by slipping at the relevant portion, and the used abrasive tape 40 is wound up without difficulty. The used abrasive tape can be removed by reversing the procedure used to install it, and replaced with a new one.

In the above device, the deceleration motor 76 of the workpiece support mechanism 70 is driven to operate the crank arm 77,
If the work holder 75 is moved up and down, the contact state between the polishing tape 40 and the workpiece A in the polishing section changes, and the polishing efficiency can be improved.

Next, a separate part of the polishing apparatus of the present invention will be explained.

What is shown in FIG. 5 is an apparatus for polishing and finishing a workpiece having a wide area, in which a rotary frame IOA equipped with an abrasive tape 40 is arranged vertically and has the same structure as that of the previous embodiment.

The main part of the structure is that the one-rotation frame IOA, in which the same parts as in the previous embodiment are shown with the same reference numerals, has a free end open structure and is arranged inside the frame 12A. A tape support roller 47 is disposed at the center below the feed reel 41 of the polishing tape 40 so as to freely rotate in parallel to the feed reel mounting shaft 20. Payout reel 41 and take-up reel 42 of polishing tape 40
has the same configuration as the above example and is removably mounted on the mounting shafts 20 and 30 of each reel attached to the frame 12A. The polishing tape 40 is fed from the feed reel 41 to the frame 12.
The tape is wound onto the take-up reel 42 by driving by the tape feed rollers 45 and 46 around guide rollers 48 and 48 attached to both sides of the lower end of the tape
8.48, the polishing tape 40 is wound around the outside of the tape support roller 47 arranged at the center of rotation, so that the polishing tape 40 is in line contact with the surface to be processed.

The two bearing parts on which the rotating frame 10^ is suspended via the rotating shaft 11^ are horizontally and vertically supported by a slide support device 90 provided on the side of the support arm 5 of the aircraft body.
It is attached to the base of a moving table 91 that can move in three dimensions, and is attached so that it can be moved vertically and horizontally using an air cylinder 92 or a screw drive machine (not shown). Of course, the support structure is not limited to this.

In the apparatus of the present invention configured in this way, the workpiece A
' is mounted on the workpiece support table T, and the lateral movement drive machine of the slide support device 90 on the side of the support arm 5 is operated to move the main body of the polishing device to a target position. Thereafter, the motor 3 is started to operate the drive mechanism 50 to rotate the rotary frame IOA at a required rotational speed, and then lowered by the air cylinder 92 to remove the polishing portion by the rotating polishing tape 40 from the workpiece A. Press it against the workpiece surface.

Thereafter, by maintaining this state and operating the lateral feed mechanism in the slide support device 90, the polishing section is moved.In addition, by moving the workpiece support table T, a wide surface can be polished smoothly. Of course, the abrasive tape 40 is moved sequentially to update the abrasive grains, and the abrasive grains are in linear contact, so the abrasive grains carried on the tape are constantly updated and a new cutting edge comes into contact with the workpiece A. Since grinding (polishing) is required, the cutting resistance between the abrasive grains and the workpiece A is small, which improves cutting efficiency, and generates less frictional heat.
The finishing accuracy of the polished surface will also be improved. The used abrasive tape 40 is wound onto a take-up reel 42 in the same manner as in the previous example.

Both of the above methods have a rotating frame 10. Although a device has been described in which the rotation of the IOA and the feeding of the abrasive tape 40 are performed by branching the driving force from one motor, it is also possible to drive both by separate motors, and also to adjust the rotation speed and the abrasive tape 40. The feed amount can be changed arbitrarily, such as by installing a transmission in the power transmission system without depending on the gear ratio.

(Effects of the Invention) As described above, according to the present invention, the abrasive tape is held on a flat surface or in a linear shape by the tape receiving part, and is rotated together with the attached rotating frame while being in strong contact with the surface to be polished. At the same time, the polishing tape is gradually moved to renew the abrasive adhesion surface in the polishing operation section, so if the flatness of the surface of the tape receiving section is increased, it is easy to machine a highly flat surface. can be obtained. In addition, if the workpiece is small, the entire width of the polishing tape can be used effectively, so there is no waste, and since the polishing tape rotates while running, the polished surface can be uniformly coated. No polishing traces occur.

Furthermore, for example, by using the back support part of the polishing tape as a roller and bringing it into linear contact with the surface to be machined in the polishing operation part, the abrasive grains of the polishing tape are constantly updated and a new cutting edge part is machined. In contact with the surface, cutting efficiency is significantly improved, resulting in high efficiency and precision.

[Brief explanation of the drawing]

Fig. 1 is a vertical cross-sectional view of a horizontal embodiment of the polishing apparatus of the present invention;
The figure is a partially cutaway plan view, Figure 3 is a longitudinal cross-sectional view of the main part, and Figure 4 is a partially cutaway plan view.
The figure is a right side view of FIG. 1, and FIG. 5 is a partial vertical sectional view of a separate vertical device. 1... Machine base 2... Bearing part 3... Motor 10, IOA... Rotating frame 11, IIA... Rotating shaft 12.12A...
Frame body 15...Tape receiving surface 20...Rolling reel mounting shaft 21.31...Support main *ii+22.32...Reel mounting face plate 23.33...Screw shaft 24.34.
... Presser disc 25 ... Feeding speed adjustment mechanism 30 ... Take-up reel mounting shaft 35 ... Driving force transmission gear 36 ... Brake disc 40 ... Polishing tape 41 ... Feeding butt reel 42... Take-up reel 45.46... Tape feed roller 45°, 46'... Tape feed roller shaft 47... Tape supporting roller 50... Drive mechanism 48... Guide roller 5
1.52, 53, 54, 58, 59.62.63...
Gear 55... Drive N 56... Bevel gear 57... Intermediate drive shaft 70... Workpiece support mechanism 71... Support frame 72... Support seat 73.
...Support 75...Work holder 75°
...Work holder head 76...Deceleration motor 77...Crank arm 80...Cover 82...Through hole 90...
・Slide support device 91...Moving table 92...Air cylinder A, A'...Work

Claims (1)

[Scope of Claims] 1. A rotating frame that is rotatable with a rotating shaft at its base end, and a biaxial abrasive tape reel that is disposed parallel to the rotating frame at a required interval along the rotating axis. A mounting shaft,
an abrasive tape payout reel and an abrasive tape take-up reel that are detachably attached to each reel attachment shaft, and a drive mechanism that runs the abrasive tape and rotates the rotating frame; the take-up reel attachment shaft Power is transmitted from the drive motor through its drive mechanism, and a brake mechanism that applies tension to the abrasive tape is attached to the end of the shaft where the abrasive tape payout reel is attached, and the abrasive tape is The abrasive tape is wound from the reel to a take-up reel through a tape feed roller that rotates within the frame around an abrasive tape receiving part provided on the free end side of the rotating frame, and a position opposite to the abrasive tape receiving part. When the polished surface of the workpiece comes into contact with the polishing tape,
A polishing apparatus characterized in that the rotating frame is supported on a polishing machine body so as to be able to be separated from the rotary frame. 2. Each reel mounting shaft of the abrasive tape incorporated in the rotating frame has the middle part omitted and is mounted inside the rotating frame.
A reel mounting face plate is fixed to one shaft end, and a reel holding disc is rotatably attached to the other shaft end. 2. The polishing device according to claim 1, wherein the polishing tape reel is screwed into the reel and moved forward and backward by an external rotational operation, and the reel of the polishing tape is detachably attached to the reel mounting shaft. 3 At the shaft end of each of the reel mounting shafts on the side where the reel mounting face plate is provided, the feeding reel mounting shaft is equipped with a brake mechanism for adjusting the feeding speed by external screw adjustment, and the take-up reel mounting shaft is equipped with a drive shaft. Claim 1: The power transmission gear is configured such that rotational force is transmitted to the reel mounting shaft via a braking mechanism, so that the rotational speed can be automatically adjusted according to the amount of winding of the abrasive tape. Or the polishing device according to 2. 4. The polishing apparatus according to claim 1, further comprising a work support device disposed at a position offset by an appropriate amount from the rotational axis of the rotating frame so that the workpiece faces the workpiece. 5. Any one of claims 1 to 3, wherein the device supporting the rotating frame is movable in three dimensions so that the rotating frame can be rotated while the abrasive tape is running, and the processing surface can be moved in any direction. The polishing device described in Crab. 6. The polishing device according to claim 1, wherein the polishing tape receiving portion provided at the end of the rotating frame is a flat surface. 7. The polishing device according to claim 1, wherein the polishing tape receiving portion provided at the end of the rotating frame is a roller.