JP7085253B1 - Grindstone width forming device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a grindstone width forming method capable of shortening a forming time, improving dimensional accuracy of a grindstone and extending the life of a grindstone when forming an inclined surface having a reverse taper shape on both surfaces of a disc-shaped grindstone. do.
SOLUTION: A rotating disk-shaped forming blade 1 is arranged so as to face each other. Both sides of the disc-shaped grindstone P are inserted between the forming blades 1 to adjust the grindstone width. A linear cam is interposed between the opposing forming blades 1. The grindstones P are sequentially inserted between the forming blades 1 from the tip side while keeping the distance between the forming blades 1 close to each other. An inclined surface that becomes deeper from the front end side to the rear end side is formed on both sides of the inserted grindstone P.
[Selection diagram] Fig. 1

Description

The present invention relates to a grindstone width forming method and a grindstone width forming apparatus suitable for forming the width of a grindstone used for groove width grinding, end face grinding and the like.

The applicant has previously proposed a method for polishing a work groove and a polishing device described in Patent Document 1. The grindstone used here is a disk-shaped grindstone that grinds the width of the vane groove when forming the rotor for the vane pump. The device is equipped with a width dresser for adjusting the width of the grindstone layer.

This width dresser is a device that grinds both sides of a disk-shaped grindstone with a pair of rotary dressers to adjust the width of the grindstone to the planned machining width. In this width dresser, both sides of the grindstone, which is the processing width, are adjusted in parallel.

On the other hand, Patent Document 2 describes a grindstone forming apparatus. According to this device, the width of the disc-shaped grindstone is not adjusted in parallel, but is adjusted to a reverse taper shape with a widened tip.

That is, when a plurality of pencil-shaped diamond tools are faced on both sides of the grindstone and the distance between the tips of the diamond tools is reduced toward the rotation axis of the grindstone to form an inclined surface on both sides of the grindstone, the inclined surface is reversely tapered. It becomes a shape and the width of the grindstone is widened on the tip side.

Japanese Patent No. 6847484 Japanese Unexamined Patent Publication No. 64-2863

When the width of the grindstone is adjusted by the width dresser described in Patent Document 1, the processing width of the grindstone is adjusted in parallel. Then, the side surface of the grindstone may come into contact with the finished surface of the groove, and the dimensions and surface accuracy of the inner groove may deteriorate. Therefore, in order to grind the inner groove surface, it is desirable to form the disc-shaped grindstone in a grindstone width in which both sides have a reverse taper shape and the tip side is widened, rather than a disc-shaped grindstone having both sides parallel to each other.

The grindstone described in Patent Document 2 has an inclined surface having a reverse taper shape on both sides of a disk shape. However, since this grindstone has a structure in which both sides of a rotating grindstone are polished with the tip of a pencil-shaped diamond tool, the number of rotations of the grindstone required to form an inclined surface on both sides of the grindstone becomes extremely large, and the grindstone is inclined. The work time for forming the surface becomes extremely long.

Moreover, when the inclined surface is formed by the pencil-shaped diamond tool, it is difficult to smooth the entire inclined surface because it is ground in a state where fine lines are overlapped.

Further, since the tip of the diamond tool in the shape of a pencil concentrates on the surface of the grindstone for grinding, there is a risk of damaging the grindstone and shortening the life of the grindstone.

Therefore, the present invention was created in order to solve the above-mentioned problems, and when forming a reverse-tapered inclined surface having a tip extending on both sides of a disk-shaped grindstone, the forming time is shortened and the grindstone is formed. It is an object of the present invention to provide a grindstone width forming apparatus capable of improving the dimensional accuracy of the grindstone and extending the life of the grindstone.

In order to achieve the above object, the first means in the present invention is to arrange the rotating disk-shaped forming blades 1 so as to face each other, and insert both sides of the disk-shaped grindstone P between the forming blades 1. In the grindstone width forming apparatus for adjusting the grindstone width, a pair of case bodies 2 for rotationally supporting each forming blade 1 and a taper gauge 5 interposed between the facing case bodies 2 are provided, and the case of the taper gauge 5 is provided. An inclined surface 5A is formed on both sides facing the body 2, a roller 3 in contact with the inclined surface 5A is provided on the case body 2, a pressing spring 4 is provided on the case body 2, and the case body 2 is tapered by the pressing spring 4. The distance between the forming blades 1 is adjusted by pressing and urging in the direction of the gauge 5, and the grindstones P are inserted between the forming blades 1 to bring the distance closer from the tip side to both sides of the grindstone P from the tip side to the rear. The purpose is to form an inclined surface that becomes deeper toward the end side.

According to the present invention, the forming time is shortened and the dimensions of the grindstone are shortened by forming inclined surfaces that become deeper from the tip end side to the rear end side on both sides of the grindstone P while narrowing the distance between the disc-shaped forming blades 1. It can improve the accuracy and extend the life of the grindstone.

It is a schematic diagram which shows the molding method of this invention. (A) to (d) are explanatory views showing the molding method of this invention. It is a schematic front view which shows the molding apparatus of this invention. It is a schematic plan view which shows the molding apparatus of this invention. It is explanatory drawing of the main part which shows the molding apparatus of this invention. It is explanatory drawing of the main part which shows the molding apparatus of this invention.

The present invention is for adjusting the grindstone width of the grindstone P forming the groove, for example, a molding method and a molding apparatus for adjusting the grindstone width of the grindstone P for finishing the vane groove when forming a rotor for a vane pump or the like. .. In particular, it forms an inclined surface having a reverse taper shape in which the tip portion is widened on both sides of the disc-shaped grindstone P.

The molding method of the present invention is a method in which the forming blades 1 for adjusting the processing width of the grindstone P are arranged so as to face each other, and the grindstone P having a disk shape is inserted between them to grind both sides of the grindstone P. See Figure 1). The forming blade 1 forms a rotating disk shape, and forms an inclined surface that becomes deeper from the front end side to the rear end side on both sides of the grindstone P while adjusting the distance between the forming blades 1 facing each other.

That is, the distance between the forming blades 1 is adjusted by the linear motion cam, the distance between the forming blades 1 is shortened, and the grinding blades 1 sequentially grind from the tip sides of both sides of the inserted grindstone P. It forms an inclined surface that becomes deeper toward the end side.

For example, as shown in FIG. 2A, the start of Y1 and W in the arrow direction is simultaneous, and the arrival of Y2 and W1 is simultaneous. In this way, by synchronizing the speed of the grindstone P in the Y direction with the speed at which the distance between the forming blades 1 becomes narrower, it is possible to form an inclined surface having a reverse taper shape on both sides of the grindstone P.

Further, as shown in FIGS. 2 (b) to (d), in order to adjust the grindstone width of the grindstone P to a predetermined width, the grindstone P may be ground many times by the forming blade 1. For example, when the width of the grindstone P is thick and the predetermined grindstone width is W, the width is set to W + α in the initial adjustment (see (b) in the figure). Further, it is possible to repeat this adjustment to bring W + α closer to W. Finally, the grindstone P having a width of W + α is ground by the forming blade 1 to adjust the predetermined grindstone width to W (see (c) in the figure). After the adjustment of the grindstone P is completed, the forming blades 1 are opened to each other and the grindstone P is taken out and used (see (d) in the figure).

The apparatus of the present invention includes a case body 2 that individually rotates and supports each forming blade 1, and a taper gauge 5 that is used as a linear motion cam. The taper gauge 5 forms an inclined surface 5A on a surface facing each forming blade 1, and adjusts the distance between the forming blades 1 along the inclined surface 5A (see FIGS. 1 and 4).

That is, the case body 2 is a portion that can be moved independently, and the case body 2 and the molding blade 1 are integrally provided, and the distance between the molding blades 1 is adjusted together with the case body 2. Then, when the taper gauge 5 between the case bodies 2 is moved by the gauge moving motor 6, the case body 2 moves along the inclined surface 5A, and the distance between the forming blades 1 is adjusted (see FIG. 1). ).

That is, the grindstones P are sequentially inserted between the forming blades 1 whose intervals are sequentially narrowed together with the case body 2 to form inclined surfaces on both sides of the grindstone P. In the illustrated example, the roller 3 in contact with the inclined surface 5A of the taper gauge 5 is provided so that the case body 2 can move smoothly (see FIGS. 1 and 4). Further, a pressing spring 4 is provided on the case body 2, and the pressing spring 4 presses and urges the case body 2 in the direction of the taper gauge 5, so that the adjustment width of the case body 2 can be accurately maintained.

In the illustrated example, the adjusting device 10 for adjusting the distance between the case body 2 and the forming blade 1 is provided (see FIG. 3). In this adjusting device 10, each case body 2 is placed on a pair of left and right main sliders 11, and the distance A between the case bodies 2 is adjusted by a fixed rod 14. In order to adjust this interval A, the stopper 16 fixing the case body 2 and the main slider 11 is loosened and adjusted (see FIG. 5).

A stopper block 11A is formed on the main slider 11, and a gap is formed by loosening the stopper 16 locked to the stopper block 11A (see FIG. 5).

Further, the case body 2 shown in FIG. 6 shows a state in which the distance between the case bodies 2 is adjusted by the gap adjusting bolt 17. At this time, the spacing adjusting nut 18 is loosened to form a gap between the case body 2 and the spacing adjusting nut 18. Each of these gaps becomes a play when the gap between the case bodies 2 changes along the taper gauge 5.

After adjusting the interval A of each case body 2 in this state, each case body 2 is fixed to the main slider 11 (see FIG. 3). At this time, since each main slider 11 is connected by a joint plate 12, in order to align the center position of the distance A of each case body 2 with the center of the grindstone P, each main slider 11 is simultaneously moved by the servomotor 13. , Adjust so that the center position of each of the forming blades 1 and the center position of the grindstone P are aligned (see FIG. 3).

Next, with the case body 2 pressed by the pressing spring 4, it is confirmed that the roller 3 is pressed against the taper gauge 5 by the fixing spring 14A, and the clamp 15 is fixed (see FIG. 4). Then, the case body 2 and the roller 3 are integrated via the fixed rod 14, and the roller 3 is always kept pressed against the taper gauge 5.

In the present invention, the configuration of the grindstone P0, the width dresser 20, or the like is not limited to the configuration shown in the figure, and the design can be freely changed without changing the gist of the present invention. Further, the use examples of the present invention are not limited.

P Grinding stone 1 Molding blade 2 Case body 3 Roller 4 Pressing spring 5 Tapered gauge 5A Inclined surface 6 Gauge moving motor 10 Adjusting device 11 Main slider 11A Stopper block 12 Joint plate 13 Servo motor 14 Fixed rod 14A Fixed spring 15 Clamp 16 Stopper 17 Gap adjustment bolt 18 Gap adjustment nut 19 Gap gauge

Claims (1)

In a grindstone width forming device that adjusts the grindstone width by arranging rotating disc-shaped forming blades so as to face each other and inserting both sides of the disc-shaped grindstone between the forming blades, each forming blade is rotationally supported. A pair of case bodies and a taper gauge interposed between the facing case bodies are provided, inclined surfaces are formed on both sides of the taper gauge facing the case body, and rollers in contact with the inclined surfaces are provided on the case body. , A pressing spring is provided on the case body, and the case body is pressed and urged in the taper gauge direction to adjust the distance between the forming blades. A grindstone width forming device characterized in that it is inserted from the grindstone to form an inclined surface that becomes deeper from the tip side to the rear end side on both sides of the grindstone.

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