WO2004045805A1

WO2004045805A1 - Rotary abrasive material

Info

Publication number: WO2004045805A1
Application number: PCT/JP2003/013815
Authority: WO
Inventors: Isamu Yanase
Original assignee: Yanase Kabushiki Kaisha
Priority date: 2002-11-20
Filing date: 2003-10-29
Publication date: 2004-06-03
Also published as: JPWO2004045805A1; EP1586418A1; EP1586418A4; US20050085174A1; JP4261484B2

Abstract

A first member (1) has a base plate (11) and an abrasive sheet installation portion (12) where an abrasive sheet (14) is fixed. The base plate (11) or the abrasive sheet installation portion (12) is provided with an air-introducing portion (15) as a space penetrating from the back face side to the front face side of the base plate or the abrasive sheet installation portion, and an airflow passes from the back face side to the front face side as a rotary abrasive material rotates. When the first member (1) is used as a single unit, overheating is prevented and swarf can be removed when the rotation of a projection portion as the abrasive sheet installation portion (12) generates an airflow flowing through the air-introducing portion (15). Further, when a second member (2) is provided such that its axial position is adjustable relative to the first member (1), an abrasive sheet (23) of the second member (2) can be inserted into and removed from the first member (1), so that, depending on processing required, grinding work can be performed by easily switching abrasive sheets to be used.

Description

Description Rotary abrasives Technical field

The present invention relates to a rotary abrasive used by being mounted on a rotary tool. Background technology ''

2. Description of the Related Art Conventionally, a rotating abrasive material that is a disc-shaped object that can be polished on an object to be polished by being mounted on a rotating shaft of a rotating tool such as a grinder and rotating the same is used. For example, a disk for a disk grinder or a buffing disk. In addition, Japanese Patent Application Laid-Open No. Hei 9-111744

As described above, a type of rotary abrasive material in which abrasive sheets such as sandpaper are radially arranged on the surface of a disk-shaped substrate is known.

With this type of rotating abrasive, frictional heat is generated between the object to be polished and the polishing sheet during use, and the frictional heat may cause deterioration of the polishing sheet and deterioration of the object to be polished. was there.

When using a rotary abrasive, a rotary abrasive with a rough sandpaper for roughing and a rotary abrasive with a fine sandpaper for finishing are used. At that time, the rotating abrasive was replaced with the rotating tool one by one, or a rotating tool with a different rotating abrasive was prepared separately.

Therefore, in view of the above problems, it is a first object of the present invention to provide a rotary abrasive which can remove frictional heat generated between an object to be polished and a polishing sheet. Further, it is an object of the present invention to provide a rotary abrasive which can be used by switching between a coarse abrasive sheet and a fine abrasive sheet without replacing the rotary abrasive itself. This is the second issue. Disclosure of the invention

In order to solve the above-mentioned problem, the invention described in claim 1 of the present application is a disk-shaped object in which a polishing sheet 14 is arranged on a surface, and by attaching this to a rotary tool G, In the rotary abrasive 10 capable of polishing an object, the rotary abrasive 10 includes a substrate 11 and a polishing sheet mounting portion 12, and the substrate 11 has a disk shape in plan view. And the center thereof can be attached to the rotating shaft S of the rotating tool G. The polishing sheet attaching portion 12 is provided to extend in the radial direction of the substrate 11 and has a surface. The polishing sheet 14 is attached to the side, and the substrate 11 or the polishing sheet attaching portion 12 is a space penetrating from the back side to the front side, and is used for rotating the rotating abrasive 10. As a result, an air inlet 15 through which airflow passes from the back side to the front side was provided. A rotary abrasive is provided. Further, the invention according to claim 2 of the present application, the polishing sheet mounting portion 12 is a plurality of protrusions 12 provided so as to protrude radially outward of the substrate 11, The circuit according to claim 1, wherein the air introduction part (15) is a space existing between the protrusions (12), and the polishing sheet (14) is attached to the protrusion (12). Provide a polishing material. In addition, the invention described in claim 3 of the present application is characterized in that the outer peripheral connecting portion 16 is formed so as to connect the outer peripheral portions 12 c of the respective projecting portions 12 with each other, thereby introducing air. 3. The rotary abrasive according to claim 2, wherein the part 15 is surrounded by the substrate 11, the protruding part 12, and the outer peripheral connecting part 16. In the invention described in claim 4 of the present application, the polishing sheet 14 is arranged on the surface. A rotating abrasive material 10 that can polish a target object by attaching it to a rotating tool G is a disk-shaped object that has a disk shape in plan view. It has a substrate 11 whose center can be attached to the rotation axis S of the rotary tool G, and a polishing sheet 14 is attached to at least a part of the surface side of the substrate 11, and this substrate 11 has A space penetrating from the back side to the front side, wherein an air introduction section 15 through which an airflow passes from the back side to the front side with the rotation of the rotating abrasive 10 is provided. Provide a rotating abrasive. The invention described in claim 5 of the present application is a disk-shaped object in which the polishing sheets 14 and 23 are arranged on the surface, and by attaching this to the rotary tool G, the object is polished. In the rotating abrasive 10 that can be used, the rotating abrasive 10 is composed of a first member 1, a second member 2, and an attachment position adjusting means 25, and the first member 1 is a substrate 1 1 The substrate 11 has a disk shape in plan view, and the center thereof can be attached to the rotation axis S of the rotary tool G. A plurality of projections are provided so as to protrude in a radially outward direction, and a polishing sheet insertion space 15 is provided between the protruding portions 12, and the polishing sheet 14 is protruded from the protruding portions. The second member 2 includes a substrate 21, and the substrate 21 is a disk in plan view. And the center thereof can be attached to the rotation axis S of the rotary tool G, and the abrasive 23 is a surface on one side of the substrate 21 and the first member 1 in plan view. The mounting position adjusting means 25 is arranged in a position corresponding to the axial position when the first member 1 and the second member 2 are combined. The first member 1 and the second member 2 are combined so that the centers of the substrates 11 and 21 coincide with each other, so that the abrasive material 14 of the first member 1 and the second member 2 can be adjusted. The abrasive member 23 of the two members 2 is alternately arranged, and the abrasive sheet 23 of the second member 2 is made to be able to come and go with respect to the first member 1. Is provided. The invention described in claim 6 of the present application is characterized in that the polishing sheets 14 and 23 are arranged so as to be inclined with respect to the rotation direction of the rotary abrasive 10. A rotary abrasive according to any one of claims 2, 3, and 5 is provided. BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 is a perspective view showing how a rotary abrasive according to a first embodiment of the present invention is mounted on a rotary tool.

FIG. 2A is a perspective view showing a state in which the second member is submerged with respect to the first member in the rotary abrasive of the first embodiment, and FIG. FIG.

FIG. 3A is a perspective view showing a state in which the second member protrudes from the first member in the rotary abrasive of the first embodiment, and FIG. FIG.

FIG. 4 is a perspective view showing how to combine the first member, the second member, and the connecting member in the rotary abrasive according to the first embodiment.

FIG. 5 (A) is a plan view showing a connecting member in the rotary abrasive of the first embodiment, FIG. 5 (B) is a front view thereof, and FIG. 5 (C) is a bottom view thereof.

FIG. 6 is an explanatory view in plan view showing a state in which the first member is attached to the connecting member in the rotary abrasive according to the first embodiment. FIG. Indicates the case where the first member has shifted.

FIG. 7 is a plan view showing the substrate and the projecting portion of the first member in the rotary abrasive material of the first embodiment, and a dotted line portion in the figure shows an outer peripheral connecting portion.

FIG. 8A is an explanatory view of a main part of the rotary abrasive of the first embodiment, showing the first member, as viewed from the side, and FIGS. 8B and 8C show another example. It is a principal part explanatory view of a side view.

FIG. 9 (A) is a perspective view showing a rotary abrasive according to another example of the present invention. (B) is an explanatory view of a principal part of the same side view.

FIG. 10 is a perspective view showing a rotary abrasive according to another example of the present invention.

FIG. 11 is a perspective view of a rotary abrasive according to a second embodiment of the present invention, as viewed from the back surface side.

FIG. 12 is a perspective view of a rotary abrasive according to a second embodiment of the present invention as viewed from the front side. BEST MODE FOR CARRYING OUT THE INVENTION

First, the rotary abrasive according to the first embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view showing a method of attaching the rotary abrasive of the present embodiment to a rotary tool, and FIGS. 2 and 3 are perspective views showing the rotary abrasive of the present embodiment. In the description of the present invention, the side on which the polishing sheet of the rotary abrasive (including the first member, the second member, etc.) is provided is referred to as the front side, and the opposite side is referred to as the back side. As shown in FIG. 1, the rotary abrasive 10 according to the present embodiment is used by being attached to a rotary shaft S of a rotary tool G such as a grinder. The basic configuration of the rotary abrasive 10 is the same as that of a conventional rotary abrasive, and a polishing sheet such as sandpaper is provided on the surface of a substrate that is rotated by transmitting power from the rotation axis S of the rotary tool G. It is a disk-shaped object with.

The rotary abrasive 10 was attached to the rotary tool G by setting the rotation axis S of the rotary tool G at the center of the rotary abrasive 10 (in this embodiment, the center of the connecting member 25). It is made by passing the fixed nut N through the insertion hole 25 k and screwing it into the rotating shaft S. The external appearance of the rotary abrasive 10 in this embodiment is as shown in FIGS. 2 and 3, and the two types of members 1 and 2 are moved in the axial direction (rotating shaft) as shown in FIG. S direction) It is one that is combined with and integrated. Hereinafter, each of these members will be described as a first member 1 and a second member 2. As shown in FIGS. 4 and 7, the first member 1 is provided with a substrate 11 made of a synthetic resin and a protrusion 12.

In this embodiment, the substrate 11 has an annular appearance. A fitting hole 13 for receiving the connecting member 25 is provided in a central portion of the substrate 11. The connecting member 25 attached to the fitting hole 13 is attached to the rotating shaft S of the rotating tool G, and transmits the power of the rotating tool G to the first member 1. A protruding portion 12 as a polishing sheet attachment portion is provided integrally with the substrate 11 in a radially outward direction of the substrate 11, and a polishing sheet 1 is provided on one surface (the front surface, the lower side in FIG. 4). 4 are glued.

The space between the protruding portions 12 is a space, which is the air introduction portion 15 and also serves as the polishing sheet input space 15. In addition, this space has different functions of the air introduction part 15 and the polishing sheet insertion space 15 depending on how the first member 1 is used. In the following, names are used depending on the function. Shall be assumed.

The polishing sheet 14 bonded to the protruding portion 12 is formed by applying abrasive grains such as diamond grains to one surface of a sheet made of paper, cloth, or the like, such as sandpaper. In this embodiment, a rectangular cut of the polishing sheet 14 is applied to each of the polishing sheets 14 so that the surface on which the abrasive grains are applied faces the projection 12. Arrange the parts so that they overlap in the circumferential direction, and fix them with an adhesive or the like. As described above, since the polishing sheets 14 are arranged on the surface of the protrusion 12, as shown in FIG. 8A, the polishing sheet 14 is rotated in the rotation direction R of the first member 1. It is inclined backward and downward in the figure.

The protrusion 12 is formed at an angle to the substrate 11 in a side view. ing. Specifically, as shown in FIG. 8 (A), the first member 1 is formed so as to be inclined upward in the drawing in accordance with the rotation direction R of the first member 1. In addition, the front end surface 12a and the rear end surface 12b in the rotation direction R are chamfered, and in addition, since the polishing sheets 14 are also arranged obliquely, the air introduction section is formed. 15 is a space that is smoothly inclined with no protrusions relative to the rotation direction scale.

Due to such a shape of the air introduction portion 15, when the first member 1 is used alone by being attached to the rotary tool G, the protrusion 1 2 Guides the air present in the air introduction section 15 in one direction from the back side of the first member to the front side (downward as shown in FIG. 8A). Then, the airflow F thus induced passes through the air inlet 15. Therefore, when the first member 1 is rotating, the airflow F is constantly generated, and the frictional heat generated between the object to be polished and the polishing sheet 14 is carried away by the airflow F. It is possible to eliminate adverse effects such as deterioration of the polishing sheet 14 and deterioration of the polishing object, which are caused by accumulation of frictional heat. The airflow F can also remove chips generated by polishing.

Here, regarding the above-mentioned effects, the applicant performed an experiment of polishing a 10 cm square steel plate for 3 minutes under the same conditions, and when the conventional rotating abrasive was used, the surface temperature of the steel plate was 8 Ot. : On the other hand, when the first member 1 of the present example was used, the temperature rose only to 60 ° C. Therefore, it was confirmed that the cooling effect by the airflow F was working effectively.

Although the effect of inducing air as described above is weakened for the protruding portion 12, as shown in FIG. 8 (B), it is flat with respect to the substrate 11 to simplify the structure. It may be formed in rows, or as shown in FIG. 8 (C), may be formed as a triangle with a horizontal surface and a side view.

In addition to the above, as shown in FIG. 7, the shape of the protruding portion 12 in plan view is such that the front end surface 12a is radial, and the rear end surface 12b is radially outward. It is formed so as to be inclined toward the rear side in the rotation direction R. Of protrusions 1 and 2 above Due to the inclination in side view and the shape in plan view as described

The protruding portion 12 acts like a blade in a fan, efficiently guides the air present in the air introduction portion 15, and can generate the airflow F.

Also, as shown in FIG. 9, a rectifying plate 17 protruding along the substantially circumferential direction on the back side of the protruding portion 12 and a back side of the front end side 12 a (see FIG. 9B). If the air introduction projection 18 is formed so as to protrude forward in the rotation direction R on the upper side), air can be more efficiently guided to the air introduction section 15 to generate the airflow F. Can be.

Also, as shown in Fig. 10, the above-mentioned current plate 17 and the inclined surface 19 at the distal end in the radial direction of the protruding portion 12 are formed, and the dimensions of the front end side end surface 12a are reduced. Thereby, the rotational resistance of the first member 1 is reduced, and the airflow F can be generated more efficiently.

Further, as shown by the dotted line in FIG. 7, an outer peripheral connecting portion 16 is formed so as to connect the outer peripheral portions 12 c of the respective protruding portions 12, and the air introducing portion 15 is formed by the substrate 11 1 It may be surrounded by the protruding portion 12 and the outer peripheral connecting portion 16. Further, as in a second embodiment to be described later (see FIGS. 11 and 12), a substrate 11 in which the substrate 11, the protruding portion 12, and the outer peripheral connecting portion 16 in FIG. The substrate 11 may be provided with a through-hole-shaped air inlet 15. In this case, the substrate 11 in the first embodiment corresponds to the central portion 1 lx of the substrate 11 in the second embodiment, and the protrusion 12 in the first embodiment corresponds to the substrate 11 in the second embodiment. It corresponds to 1 1 y around 1 1. So far, the case where the first member 1 is used alone by attaching it to the rotary tool G has been described. Hereinafter, the case where the first member 1 and the second member 2 are used in combination will be described.

In this embodiment, the first member 1 is used alone by being attached to the rotary tool G. In both cases where the first member 1 and the second member 2 are used in combination, the connecting member 25 must be used, and the rotary tool G is connected via the connecting member 25. Is transmitted to each member 1, 2. The shape and function of the connecting member 25 will be described later in detail.

The basic form of the second member 2 is the same as that of the first member 1, but here, as shown in FIG. 4, the substrate 21 is formed in a flat plate shape.

A fitting hole 22 for receiving the connecting member 25 is provided in the center of the substrate 21, as in the case of the first member 1.

In a plan view, a position corresponding to the polishing sheet insertion space 15, which is a space between the protruding portions 12 of the first member 1, is provided on the first member 1 with respect to the substrate 21. The polishing sheets 23 are arranged with the same inclination as that of the polishing sheets 14. In the present embodiment, the end of the polishing sheet 23 is sandwiched between the notches formed in the radial direction in the substrate 21 and then fixed with an adhesive or the like.

In the present embodiment, the polishing sheet 23 used for the second member 2 is a so-called fine polishing sheet using finer abrasive grains than the polishing sheet 14 used for the first member 1. . However, the combination of the respective polishing sheets 14 and 23 is not limited to this, and a reverse polishing sheet may be used for the second member 2 on the contrary. . Of course, abrasive sheets having the same roughness may be used.

Then, a connection member 25 serving as an attachment position adjusting means is attached to the fitting hole 22 of the substrate 21.

The connecting member 25 has a cylindrical shape as shown in FIGS. 4 and 5, and a through hole 25 k for passing the rotating shaft S of the rotating tool G is provided in the axial direction. Have been. In addition, flange-shaped projections 25a, 25d, 25g, and 25m are provided on the outer surface. The projections 25 a, 25 d, and 25 g are not provided over the entire circumference in the circumferential direction of the connecting member 25, and the substrate 21 and the substrate 11 of the first member 1 are not provided. Attach For this reason, some are cut out as cutouts 25b, 25e and 25h. The notches 25b, 25e and 25h are formed at point-symmetric positions as shown in FIGS. 5 (A) and 5 (C).

Coordinate the substrates 11 and 21 in the engagement grooves 25c, 25f and 25i formed between the projections 25a, 25d, 25g and 25m. Accordingly, the connection between the connecting member 25 and the second member 2 and the first member 1 is performed. In addition, stoppers 25 p are provided at one ends of the projections 25 a, 25 d, 25 g of the connecting member 25 so as to close the engagement grooves 25 c, 25 f, 25 i. , 25 q, and 25 r are provided.

Here, the connection between the connecting member 25 and the first member 1 is performed by arranging the substrate 11 of the first member 1 in the fitting groove 25 f formed on the side surface of the connecting member 25. .

Specifically, a projection 11a protruding from the substrate 11 into the fitting hole 13 is passed through a cutout 25e formed by cutting out the projection 25d on the side surface of the connecting member 25. Then, the substrate 11 is twisted and fixed to the connecting member 25 until the projection 11a comes into contact with the stopper 25r.

On the other hand, the attachment of the connecting member 25 and the second member 2 is basically the same as that of the first member 1 described above, but in this case, the second member 2 is connected to the connecting member 25. With reference to the end face (the upper end face in Fig. 5 (B)), the mounting position in the axial direction can be changed in two stages, the near side and the far side. When arranging the second member 2 on the near side, the protrusion 25 a, the notch 25 b, the near-side fitting groove 25 c, and the stopper 25 p formed on the connecting member 25 When positioning to the back side, the projection 25 g, notch 25 h, back side fitting groove 25 i, and stopper — 25 q formed on the connecting member 25 function respectively. I do.

Specifically, a protrusion 21 a protruding from the substrate 21 into the fitting hole 22 is passed through a notch 25 b formed by cutting the protrusion 25 a on the side surface of the connecting member 25. The projection 21a to the stopper 25p. Until the contact, the substrate 21 is twisted with respect to the connecting member 25, and the second member 2 is fixed to the near side.

Similarly, the projection 25 g is passed through a notch portion 25 h formed by notching to align the projection 25 g with the back side fitting groove 25 i, and then the projection 21 a becomes the stopper 25 q The substrate 21 is twisted with respect to the connecting member 25 until the second member 2 is fixed to the back side.

Here, the notches 25b and 25h are formed to be shifted by a predetermined angle in plan view. Therefore, when the first member 1 is moved from the state of being arranged in the near-side fitting groove 25 c and is arranged in the far-side fitting groove 25 i, the protrusion 21 a of the second member 2 is required. Only need to be twisted in the circumferential direction to match the notch 25h, no special action is required.

A drop-off preventing means is provided between the connecting member 25 and each of the members 1 and 2. Here, a case where the substrate 11 of the first member 1 is arranged in the fitting groove 25 f of the connecting member 25 will be described as an example.

On the substrate 11 of the first member 1, a projection 11 a corresponding to the cutout portion 25 e of the connecting member 25 is formed so as to protrude into the fitting hole 13. A notch 11b for locking is formed substantially in the middle of 1a. On the other hand, also in the connecting member 25, a locking projection 25n is formed at a position corresponding to the locking notch 11b.

The locking projections 25n serve as drop-off preventing means, and thus the first member 1 can be prevented from dropping in the axial direction.

That is, as shown in FIG. 6A, when the first member 1 is engaged with the connecting member 25, the locking notch 11 b of the first member 1 is engaged with the connecting member 25. With the projection 11a contacting the projection 25m, aligning it with the position of the projection 25n, rotate the engagement groove 25 while rotating it in the direction of arrow F in Fig. 6 (A). f until the first member 1 and the connecting member 25 are engaged. Can be.

As described above, the first member 1 is engaged with the connecting member 25, and the connecting member 25 is attached to the rotating tool G to perform the polishing operation. For example, during the polishing operation, the first member 1 When the rotary tool G stops suddenly, for example, when the power is turned off while in contact with the object to be polished, only the first member 1 originally operates relatively as shown in Fig. 6 (B). It rotates in the direction of the arrow S according to the law of inertia. As a result, only the first member 1 rotates in the direction in which the engagement with the connecting member 25 is released (the direction of the arrow S). In this way, the protrusion 11a is separated from the one stopper 25r that originally came into contact, and collides with the other stopper 25r, and the rotation stops.

In the state shown in FIG. 6 (B), the position of the locking notch 11 of the first member 1 and the position of the locking projection 25 n of the connecting member 25 are slightly shifted. First, set each position in advance. With this positional relationship, the locking projection 25n functions as a means for preventing falling off.

Further, as shown in FIG. 6 (A), when the first member 1 and the connecting member 25 are engaged with each other, these locking notches 11 b and locking projections 25 n The positions of both are set in advance so that they can be matched and engaged.

In the above description, the case of the first member 1 has been described as an example, but the same applies to the second member 2, whereby the first member 1 and the second member 2 are simultaneously connected. Even if it is attached to 25, it has the same effect as above. As described above, one of the two fitting grooves 25 c 25 i formed on the side surface of the connecting member 25 is selected, and the board 2 of the first member 2 is selected. By arranging 1, the axial position of the second member 2 with respect to the first member 1 can be adjusted in two stages. Thus, the polishing sheet 23 of the second member 2 can be arranged so as to be able to protrude and retract from between the polishing sheets 14 of the first member 1.

Therefore, when the projections 11a of the first member 1 are arranged in the front-side fitting grooves 25c of the connecting member 25, as shown in FIG. Against However, the polishing sheet 23 of the second member 2 is in a state of being submerged. That is, since only the polishing sheet 14 appears on the front side, in the case of the present embodiment, polishing (rough cutting) can be performed with the rough polishing sheet 14.

Next, when the projections 11a of the first member 1 are arranged in the back-side fitting grooves 25i of the connecting member 25 of the second member 2, as shown in FIG. The polishing sheet 23 of the second member 2 projects and covers the first polishing sheet 14. For this reason, in the case of the present embodiment, polishing (finishing) can be performed with the fine polishing sheet 23.

As described above, the position of the second member 2 with respect to the first member 1 can be switched by selecting the fitting grooves 25c and 25i of the connecting member 25, and the switching is also performed by the second member. It can be easily performed by twisting 2 with respect to connecting member 25.

Therefore, it is possible to easily switch between the rotary abrasives themselves without changing the rotary abrasives themselves or using different rotary abrasives with different rotary abrasives depending on the processing, as in the related art. The present invention is not limited to the embodiment described above, but can be implemented in various forms.

For example, in the case of the first embodiment, as a function of the space between the protruding portions 12 of the first member 1, when the first member 1 is used alone, the air introducing portion 15 is provided. When used in combination with the second member 2, the polishing sheet insertion space 15 for receiving the polishing sheet 23 of the second member 2 is provided. Also, by forming a notch at a position corresponding to the polishing sheet insertion space 15 of the first member 1 or by forming the substrate 21 with a mesh structure, airflow can flow through the polishing sheet insertion space 15. You may let it pass. Thus, even when the first member 1 and the second member 2 are used in combination, a function of preventing overheating and removing chips is provided. be able to.

In addition, by increasing the number of fitting grooves formed on the outer surface of the connecting member 25, in the above-described first embodiment, switching of the position between the first member 1 and the second member 2 can be achieved. Instead of two stages, three or more stages can be adjusted so that two types of polishing sheets can be used simultaneously. Next, the rotary abrasive according to the second embodiment will be described. FIG. 11 and FIG. 12 are perspective views showing the rotary abrasive of the present embodiment. The rotary abrasive according to this embodiment is also described with the same reference numerals as those in the first embodiment, except for the parts that require special distinction. The rotary abrasive according to this embodiment is a modification of the first embodiment in which the first member 1 is used alone.

The substrate 11 is also provided in the rotary abrasive according to the present embodiment. This substrate 11 has an annular appearance as shown in FIG. 11, and includes the protruding portion 12 in the first embodiment. A fitting hole 13 for receiving the connecting member 25 is provided in the center of the substrate 11 as in the first embodiment.

A polishing sheet 14 similar to that of the first embodiment is bonded to one surface (front surface) of the substrate 11. Specifically, as shown in FIG. 12, the polishing sheet 14 is not attached to the central portion 11X of the substrate 11, but is attached to the peripheral portion 11y. As shown in FIG. 12, the air introduction part 15 in the present embodiment has a through hole 15 a penetrating from the front side to the back side at the central part 11 X of the substrate 11, as shown in FIG. As shown in the figure, it communicates with the through hole 15a, and from the air intake groove 15 formed from the central portion 11X to the peripheral portion 11y on the back side of the substrate 11. Has become.

The through hole 15a extends from the back side to the front side as shown by the dotted line in Fig. 12.

Four In this case, the rotating abrasive is provided so as to be inclined toward the rotation direction R. The air intake groove 15b extends from the through hole 15a located at the central portion 11X of the substrate 11 in the radial direction of the substrate 11 and in the rotational direction R of the rotating abrasive. The shape is such that it draws a curved line, and in addition, the width gradually increases as it goes radially outward. Further, on the front side in the rotation direction R with respect to the air intake groove 15b, as shown in FIG. 11, a slope 11z formed by forcing the side surface of the substrate 11 is formed. The air can be smoothly guided to the air introduction part 15 with the rotation of the abrasive.The air circulation part 15 and the inclined surface 11 z having the above-described form are formed on the substrate 11. As a result, air is guided to the through hole 15a via the slope 11z and the air intake groove 15b as the rotating abrasive material rotates. Then, the airflow thus induced passes through the through-hole 15 a and gushes to the surface side of the substrate 11. Therefore, when the rotating abrasive is rotating, this airflow is constantly generated, and the airflow carries away the frictional heat generated between the object to be polished and the polishing sheet 14. Similarly, it is possible to eliminate adverse effects such as deterioration of the polishing sheet 14 and deterioration of the object to be polished, which are caused by accumulation of frictional heat. In addition, chips generated by polishing can be eliminated by this air flow.

In the present embodiment, the form in which the through hole 15a is provided in the central portion 11X of the substrate 11 is shown, but the present invention is not limited to this. For example, a through hole 15a may be provided in the peripheral portion 11y so that air is ejected from between the polishing sheets 14. Further, the protruding portion 12 in the first embodiment may be provided with the air introduction portion 15 and the through hole 15a as in the second embodiment, and may be implemented in various other forms. . Here, the rotary abrasive according to the above-described second embodiment was prototyped, and a comparative test with a conventional rotary abrasive was performed. In this comparative test, a stainless steel plate (SUS304) was used as the object to be polished, each rotating abrasive was mounted on a disk grinder, and polished at a rotation speed of 110 Omin- ¹ . The amount and the amount of reduction in the weight of the rotating abrasive (wheel loss) were measured every 3 minutes, and the measurement was performed for a total of 30 minutes. In addition, each rotating abrasive used was a polishing sheet 14 with a count of 60, and 80 rotating sheets were arranged per rotating abrasive.

The results are as shown in Table 1. The rotating abrasive according to the present invention was able to scrape off more polishing objects than the conventional one. Therefore, it was clarified that polishing could be performed more efficiently by blowing airflow from the surface side of the rotating abrasive material and performing polishing while removing frictional heat.

(table 1 )

The present invention has the following advantageous effects.

In the invention described in claims 1 or 4 of the present application, an airflow that constantly passes through the air introduction section is generated with the rotation of the rotating abrasive. For this reason, the frictional heat generated between the object to be polished and the polishing sheet is carried away by the airflow, and the adverse effects such as deterioration of the polishing sheet and deterioration of the object to be polished, which are generated by the accumulation of the frictional heat, can be eliminated. .

Further, according to the invention described in claims 2 or 3 of the present application, with the rotation of the rotary abrasive, the protruding portion guides the air present in the air introducing portion to one side, and Occurs. This airflow always passes through the air inlet during the rotation of the rotating abrasive. For this reason, the frictional heat generated between the polishing object and the polishing sheet is carried away by the air current, and the adverse effects such as deterioration of the polishing sheet and deterioration of the polishing object, which are generated by accumulation of the frictional heat, can be eliminated.

In the invention described in claim 5 of the present application, since the position of the first member with respect to the second member can be easily switched, the rotating abrasive itself can be rotated according to necessary processing. It is possible to easily carry out polishing work without having to replace each time or use a different rotating tool with a different rotating abrasive material, and to use the invention described in claim 6 of the present application. Therefore, in addition to the effect of any one of the inventions set forth in claims 2, 3, and 5, especially when the space between the projecting portions is used as the air introducing portion, the air introducing portion is formed by a polishing sheet. Since the rotating abrasive is rotated, the airflow can be smoothly flowed to the air introduction part.

Claims

The scope of the claims

1. An abrasive sheet (14) is a disk-shaped object arranged on the surface, and by attaching it to a rotating tool (G), a rotating abrasive material (10) that can grind an object

The rotating abrasive (10) includes a substrate (11) and a polishing sheet mounting part (12).

The board (11) has a disk shape in plan view, and its center is the rotation axis of the rotary tool (G).

(S)

The polishing sheet mounting portion (12) is provided so as to extend in a radial direction of the substrate (11), and has a polishing sheet (14) mounted on the front surface side. Alternatively, the polishing sheet mounting part (12) is a space penetrating from the back side to the front side, and an air introduction part through which airflow passes from the back side to the front side with the rotation of the rotating abrasive (10). (15) A rotary abrasive material characterized by being provided with

2. A plurality of protrusions (12) provided so that the polishing sheet mounting portion (12) protrudes radially outward of the substrate (11),

The air introduction portion (15) is a space existing between the protrusions (12), and an abrasive sheet (14) is attached to the protrusions (12). 2. The rotary abrasive according to claim 1.

3. By forming the outer peripheral connecting portion (16) by connecting the outer peripheral portions (12c) of the respective protruding portions (12) to each other, the air introducing portion (15) is connected to the substrate (11). 3. The rotating abrasive according to claim 2, characterized in that the abrasive is surrounded by the projecting portion (12) and the outer peripheral connecting portion (16).

4. The abrasive sheet (14) is a disk-shaped object arranged on the surface. By attaching this to the rotating tool (G), the rotating abrasive (10) that can grind the object

The rotating abrasive (10) has a disk shape in plan view, and has a substrate (11) whose center can be attached to the rotating shaft (S) of the rotating tool (G).

A polishing sheet (14) is attached to at least a part of the front side of the substrate (11).

The substrate (11) is a space that penetrates from the back side to the front side, and an air inlet (15) through which airflow passes from the back side to the front side as the rotary abrasive (10) rotates. ) Is provided. .

5. The abrasive sheet (14, 23) is a disk-shaped object arranged on the surface, and by attaching it to the rotating tool (G), the rotating abrasive (10), which can grind the object,

The rotating abrasive (10) comprises a first member (1), a second member (2), and a mounting position adjusting means (25),

The first member (1) includes a substrate (11) and a protrusion (12),

The board (11) has a disk shape in plan view, and its center can be attached to the rotating shaft (S) of the rotating tool (G).

The plurality of protrusions (12) are provided so as to protrude in the radial direction of the substrate (11), and have a polishing sheet insertion space (15) between the protrusions (12). Yes,

An abrasive sheet (14) attached to one surface of the protrusion (12),

The second member (2) includes a substrate (21),

The board (21) has a disk shape in plan view, and its center is the rotation axis of the rotating tool (G). (S)

The abrasive (23) is located on a surface on one side of the substrate (21), and is located at a position corresponding to the abrasive sheet insertion space (15) of the first member (1) in plan view. Yes,

The mounting position adjusting means (25) is a means for adjusting the positional relationship in the axial direction when the first member (1) and the second member (2) are combined,

By combining the first member (1) and the second member (2) so that the centers of the substrates (11, 21) coincide, the abrasive (14) of the first member (1) and the second member (2) are combined. The abrasive (23) of (2) is arranged alternately,

A rotary abrasive material characterized in that the abrasive sheet (23) of the second member (2) can be protruded and retracted from the first member (1).

6. The polishing sheet (14, 23), wherein the polishing sheet (14, 23) is arranged so as to be inclined with respect to the rotation direction of the rotating abrasive (10). A rotary abrasive according to any of the preceding items.