JPH03202280A - Superposed polishing wheel - Google Patents

Abstract

PURPOSE:To prevent a hair line from being formed on a polished surface of a workpiece to be polished, by providing a superposed polishing wheel in which polishing sheets are superposed and bound with each other with being inclined with respect to the direction of a rotary shaft by an angle of less than 90deg. CONSTITUTION:Polishing sheets 1 are superposed with each other around a pipe 5 having a hollow part 6 having a bore by which the pipe can be fitted on a rotary shaft 4, so as to form a superposed member 7. Both side end parts 8, 8' of this superposed member 7 are cut perpendicularly to the rotary shaft 4. Further, the pipe 5 is inserted into an insertion hole 2 of the polishing sheets 1 constituting the superposed member 7, and the outer peripheral part 9 of the pipe 5 is bonded to the inner peripheral edge parts of the polishing sheets 1 which define the insertion hole 2, by means of a binder. Further, the cut both side end parts 8, 8' of the superposed member 7 are bonded thereto with retainer plates 11 by means of a binder, thereby it is possible to obtain a desired superposed polishing wheel.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to polymerized abrasive wheels for grinding.

[Prior Art] A conventional polishing wheel is made by inserting and superposing a plurality of circular abrasive sheets formed by applying abrasive grains onto a flexible abrasive base material at right angles to a rotating shaft. A nylon spacer or the like was interposed between the polishing sheets.

[Problems to be Solved by the Invention] Conventional polishing wheels have the disadvantage that hairlines (polishing streaks) are produced because the peripheral edges of the individual polishing sheets contact the surface of the material to be polished on the same circumference. .

Furthermore, since a plurality of nylon spacers were interposed between the abrasive sheets that were polymerized in large numbers, there was a limit to the range of abrasion of the abrasive sheets, and the spacers were uneconomical.

However, the present invention has been developed to prevent the above-mentioned hairlines from occurring and to allow polishing to be carried out for a longer period of time than conventional polymerized polishing wheels.

[Means for Solving the Problems] The present invention comprises a plurality of circular abrasive sheet materials each having an insertion hole in the center, which are bonded together while being tilted at an inclination angle of less than 90 degrees with respect to the rotational axis direction. This is a polymerized polishing wheel that is used by being attached to a device.

[For production] The operation of the present invention will be explained as follows.

The vibrator constituting the polymerized polishing wheel of the present invention is inserted into the rotating shaft, and a part of the presser taper collar is inserted between the rotating shaft and the vibrator to fix the polymerized polishing wheel (see Figure 1.2). When a polymer polishing wheel fixed to a rotating shaft is rotated at a predetermined speed to polish an object to be polished, the gap between each polishing sheet material that is polymerized and bonded and tilted at an angle smaller than 90 degrees will also be removed. Since the sheet material is formed in proportion to the inclination of the sheet material, the surface of the abrasive sheet material does not polish only the same side of the object to be polished, but the surface to be polished is Always on the move. Furthermore, even if the abrasive sheet material, which is polymerized in an inclined manner, wears out, other bonded abrasive grains located in the lower layer appear and polish, so even if hairlines appear instantly, other abrasive sheet materials cannot be used. This is canceled out by the abrasive grains that adhere to the surface. Therefore, no hair lines are observed.

Furthermore, in the case of the polymerized abrasive wheel of the present invention, since a predetermined number of spacers are not interposed between the abrasive sheet materials during polymerization,
It can be used without reducing the polishing function even if it wears out compared to conventional polymerized polishing wheels.

Furthermore, in the case of the polymerized abrasive wheel of the present invention, a vibrator or the like in which a large number of abrasive sheet materials are inserted can be recycled and used.

[Example of implementation] An example of implementing the present invention will be described below.

Reference numeral 1 denotes an abrasive sheet material having a circular outer periphery and a fitting hole 2 formed in the center, and abrasive grains 3 are bound to this sheet material 1. 4 is a rotating shaft constituting the polishing bag ff1a; 5 is a vibrator having a hollow portion 6 shaped to fit into the rotating shaft 4;
A plurality of the abrasive sheet materials 1 are polymerized on this vibrator 5 while being tilted at an inclination angle of less than 90 degrees to form a polymer 7.
form. The left and right side portions 88' of this polymer 7 are cut at right angles to the rotating shaft 4.

Then, the vibrator 5 is attached to each abrasive sheet material 1 constituting the polymer 7.
The outer periphery 9 of the vibrator 5 and the inner periphery 10 forming the insertion hole 2 of the abrasive sheet material 1 are bonded together with an adhesive. Presser plates 11 are bonded to the left and right side portions 8.8' with adhesive.

12 is a part of the presser foot taper collar. b is a conventional polymerized abrasive wheel formed by overlapping each abrasive sheet material 1' at right angles to the rotating shaft 4, with a spacer 13 interposed between the sheet materials 1'; 14 is a presser flange; 15 is a handle; [Effects] The present invention has the following effects.

(1) Since the polymerized polishing wheel was formed by polymerizing and adhering the polishing sheet materials while tilting them at an angle of inclination smaller than 90 degrees with respect to the rotation axis direction, the gap formed between each polishing sheet material rotates. By moving constantly,
It has the advantage that hair lines do not occur on the polished surface of the object to be polished.

(2) Furthermore, since the polymer polishing wheel of the present invention does not use any spacers, it has the advantage of being able to polish more than the spacer than conventional polymer polishing wheels, and therefore prolonging the life of the polymer polishing wheel. .

[Brief explanation of drawings]

FIG. 1 is a front view of the polymerized polishing wheel of the present invention, FIG. 2 is a longitudinal sectional view thereof, and FIG. 3 is a partially cutaway front view of a polishing apparatus using a conventional polishing wheel. a... Polishing device, 1, l'... Polishing sheet, 2...
・Insertion hole, 3...abrasive grain, 4.rotating shaft, 5...vibrator, 6...hollow part, 7.polymer, 8...left side, 8'
. . . right side, 9 . . . outer periphery, 10 . . . inner periphery,
11... Presser plate, 12... Part of presser taper collar,
b...Polymerized polishing wheel, 13...Spacer, 14.
... Presser flange, 15... Handle. Patent applicant: Furukawa Circuit) 7 Oil Reijin Co., Ltd.

Claims (1)

[Claims] Polymerization characterized in that a plurality of circular abrasive sheets having a insertion hole in the center are bonded together while being tilted at an angle of inclination smaller than 90 degrees with respect to the direction of the rotation axis, and used by being attached to a polishing device. polishing wheels.