JP2018034290A - Disc-shaped grind stone and grinder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a disc-shape grind stone capable of accurately grinding even in an internal corner part, and to provide a grinder.SOLUTION: In a disc-shape grind stone 10, a grinding layer 12 having a diamond abrasive grain is jointed to an outer periphery at a surface of a disc-like substrate 11. The grinding layer 12 is jointed to the substrate 11 so as to protrude to an outer side relative to an outer peripheral end 11a of the disc-like substrate 11. The grinding layer 12 is constituted of a plurality of individual grinding layers and radially jointed along a radial direction on the disc-like substrate 11.SELECTED DRAWING: Figure 1

Description

  The present invention is a disc-shaped grindstone and grinder that is attached to a grinder that is a rotary tool and peels off a surface coating film coated on a hard material surface, removes rust on a metal surface, or grinds stone or concrete. It is about.

  Conventionally, for example, a disk-shaped grindstone has been used to peel a surface coating film applied to the surface of a hard material, remove rust on a metal surface, or grind stone or concrete. As this type of disc-shaped grindstone, for example, a disc-shaped grindstone disclosed in Patent Document 1 is known.

  As shown in FIG. 3, a disc-shaped grindstone 100 disclosed in Patent Document 1 is a substantially circular chip in which a grindstone such as a metal piece coated with diamond abrasive grains is applied to a donut-shaped portion around a disc-shaped substrate 101. A plurality of polishing chips 102 formed in a shape are provided. As a result, when the polishing tip 102 is used in a grinder that rotates at high speed, a small area portion and a curved surface can be ground well.

JP 2004-25400 A (published January 29, 2004)

  By the way, in the disk-shaped grindstone 100 disclosed in the above-mentioned conventional patent document 1, the polishing tip 102 is arranged on the inner side of the outer peripheral end 101a of the disk-shaped substrate 101.

  As a result, as shown in FIG. 4, for example, there is a problem in that the corners 121 such as right angles in the object 120 to be polished having a right cross section cannot be accurately ground.

  The present invention has been made in view of the above-described conventional problems, and an object of the present invention is to provide a disc-shaped grindstone and a grinder that can be accurately ground even at a corner.

  In order to solve the above problems, the disc-shaped grindstone according to one aspect of the present invention is the disc-shaped grindstone in which a grinding layer having abrasive grains is bonded to the outer peripheral portion of the surface of the disk-shaped substrate. Is characterized in that it is bonded to the substrate so as to protrude outward from the outer periphery of the disk-shaped substrate. In this specification, grinding is used including the meaning of polishing.

  In the conventional disc-shaped grindstone, since the grinding layer exists inside the outer periphery of the disk-shaped substrate, the substrate protrudes from the grinding layer. For this reason, for example, when grinding the corner of the boundary between the flat surface portion of the material to be ground and the wall surface portion 21 having a wall surface portion rising at a right angle, conventionally, the outer periphery of the substrate comes into contact with the wall surface portion, The corner could not be ground.

  In the present invention, on the other hand, the grinding layer having abrasive grains bonded to the outer peripheral portion of the surface of the disk-shaped substrate protrudes outward from the outer periphery of the disk-shaped substrate.

  As a result, when grinding the corner, the ground layer can be brought into contact with the wall surface, and the corner can be ground.

  Therefore, it is possible to provide a disc-shaped grindstone that can be accurately ground even at the corners.

  Moreover, in the disc-shaped grindstone according to one aspect of the present invention, in the disc-shaped grindstone described above, the grinding layer includes a plurality of individual grinding layers bonded to an outer peripheral portion of the surface of the substrate, The individual grinding layers may be bonded radially along the radial direction of the disk-shaped substrate.

  Thereby, since the individual grinding layer is scattered and joined to the outer peripheral portion on the surface of the substrate, for example, the amount of diamond abrasive grains can be saved, and the cost can be reduced.

  Furthermore, the grinder in one aspect of the present invention is characterized by including the disk-shaped grindstone described above.

  According to the said invention, the grinder provided with the disk-shaped grindstone which can grind with precision also in a corner can be provided.

  According to one aspect of the present invention, there is an effect of providing a disc-shaped grindstone and a grinder that can be accurately ground even at a corner.

It is sectional drawing which shows the state which grinds a to-be-ground material with the grinder which mounted | wore with the disk-shaped grindstone in embodiment of this invention. (A) is sectional drawing which shows the structure of the said disk-shaped grindstone, (b) is a bottom view which shows the structure of the said disk-shaped grindstone. It is a bottom view which shows the structure of the disk-shaped grindstone disclosed by the conventional patent document 1. FIG. It is sectional drawing which shows the state which grinds a to-be-ground material with the said conventional disc-shaped grindstone.

  An embodiment of the present invention will be described below with reference to FIGS. 1 and 2.

  The disc-shaped grindstone of this embodiment is attached to a grinder, which is a rotary tool including a disc sander, and grinds (including polishing) stone or concrete as a material to be ground, or is a material to be ground coated on the surface of a hard material The surface coating film is ground and peeled off, or the metal surface as a material to be ground is ground to remove rust, and has a disk-shaped substrate.

  The structure of the disk-shaped grindstone 10 mounted on the grinder 1 of the present embodiment will be described based on FIGS. 1 and 2 (a) and (b). FIG. 1 is a cross-sectional view showing a state in which a workpiece 20 is ground by a grinder 1 equipped with a disk-shaped grindstone 10 according to this embodiment. FIG. 2A is a cross-sectional view showing the configuration of the disc-shaped grindstone 10 mounted on the grinder 1. FIG. 2B is a bottom view showing the configuration of the disk-shaped grindstone 10.

  As shown in FIG. 1, the disc-shaped grindstone 10 of the present embodiment is mounted on a rotating shaft 2 that is rotationally driven by a rotational driving unit (not shown) of the grinder 1.

  The disk-shaped grindstone 10 is fixedly attached to the rotary shaft 2 with, for example, a plurality of screws 3. The number of screws 3 is not limited, but is preferably a plurality, and more preferably 3 or more. In the present embodiment, for example, the number of screws 3 is four.

  As shown in FIGS. 2A and 2B, the disk-shaped grindstone 10 of the present embodiment includes a disk-shaped substrate 11 and a grinding layer 12 bonded to the outer peripheral portion of the surface of the substrate 11. ing.

  The grinding layer 12 is composed of a plurality of individual grinding layers 12 a bonded to the outer peripheral portion of the surface of the substrate 11. The plurality of individual grinding layers 12 a are bonded radially along the radial direction of the disk-shaped substrate 11. And in the disc-shaped grindstone 10 of this Embodiment, each individual grinding layer 12a is joined to the board | substrate 11 so that it may protrude outside the outer periphery of the disk-shaped board | substrate 11. FIG. In the disc-shaped grindstone 10 of the present embodiment, the individual grinding layers 12a are provided so as to be scattered on the outer peripheral portion of the substrate 11. However, the present invention is not necessarily limited to this. Thus, it may be provided continuously along the outer periphery of the substrate 11. Also in this case, the outer peripheral end of the donut board protrudes from the outer peripheral end 11 a of the substrate 11.

  That is, in the conventional general disc-shaped grindstone 100, as shown in FIGS. 3 and 4, the polishing chip 102 is bonded to the inner peripheral portion of the substrate 101, and the substrate 101 is more than the polishing chip 102. It was protruding. For this reason, for example, in the case of grinding a corner portion that is a boundary between a flat surface portion and a wall surface portion of a material to be ground having a wall surface portion that rises at a right angle, conventionally, the outer periphery of the substrate 101 abuts on the wall surface portion. The corner could not be ground.

  On the other hand, in the disc-shaped grindstone 10 of the present embodiment, the substrate 11 is joined so that a part thereof protrudes in the radial direction from the outer peripheral end 11a. For this reason, as shown in FIG. 1, it can grind also in the corner 23 of the to-be-ground material 20 which has the wall surface part 21. As shown in FIG.

  Here, the substrate 11 is made of, for example, a cemented carbide such as a sintered carbide alloy made by sintering a powder of tungsten carbide and cobalt or the like, or a material such as a steel. It has a circular shape of about 2 to 10 mm and a diameter of about 10 cm. The diameter of the substrate 11 is not necessarily limited to about 10 cm, and may be about 5 cm to 30 cm. Further, the material is not particularly limited to the above materials.

  In the individual grinding layer 12a, diamond abrasive grains as abrasive grains are bonded to the surface opposite to the bonding surface with the substrate 11 and the tip on the outer peripheral side. The abrasive grains are not necessarily limited to diamond abrasive grains, and may be, for example, a plurality of superhard abrasive grains made of a sintered metal powder.

  A grinding operation when the workpiece 20 is ground by the grinder 1 equipped with the disc-shaped grinding wheel 10 of the present embodiment having the above-described configuration will be described with reference to FIG.

  When grinding the material 20 to be ground such as stone or concrete with the grinder 1 equipped with the disk-shaped grindstone 10 of the present embodiment, the rotating shaft 2 of the grinder 1 is rotated as shown in FIG. Then, the grinding layer 12 of the disk-shaped grindstone 10 is pressed against the flat surface portion 22 of the material 20 to be ground. Thereby, the surface of the plane part 22 of the workpiece 20 can be ground. Next, even when grinding the corner portion 23 that is the boundary between the wall surface portion 21 and the flat surface portion 22 of the workpiece 20, the disc-shaped grindstone 10 of the present embodiment is such that the grinding layer 12 is the outer peripheral edge of the substrate 11. Since it protrudes more than 11a, this corner 23 can be easily ground.

  Thus, in the disc-shaped grindstone 10 of the present embodiment, the grinding layer 12 having abrasive grains is bonded to the outer peripheral portion of the surface of the disk-shaped substrate 11. And the grinding layer 12 is joined to the board | substrate 11 so that it may protrude outside the outer peripheral end 11a of the disk-shaped board | substrate 11. FIG.

  As a result, when the corner 23 having a right angle or the like is ground, the grinding layer 12 can be brought into contact with the wall surface portion 21, and the corner 23 can be ground.

  Therefore, it is possible to provide the disc-shaped grindstone 10 that can be accurately ground even at the corner 23.

  Moreover, in the disc-shaped grindstone 10 in the present embodiment, the grinding layer 12 is composed of a plurality of individual grinding layers 12a joined to the outer peripheral portion on the surface of the substrate 11, and the plurality of individual grinding layers 12a are discs. Are bonded radially along the radial direction of the substrate 11.

  Thereby, since the individual grinding layer 12a is scattered and joined to the outer peripheral part in the surface of the board | substrate 11, the quantity of a diamond abrasive grain can be saved, for example, and cost reduction can be aimed at.

  Furthermore, the grinder 1 in the present embodiment includes the disk-shaped grindstone 10 of the present embodiment. Thereby, the grinder 1 provided with the disk-shaped grindstone 10 which can grind with precision also in the corner 23 can be provided.

  Note that the present invention is not limited to the above-described embodiment, and various modifications are possible within the scope of the claims, and can be obtained by appropriately combining technical means disclosed in the present embodiment. Embodiments are also included in the technical scope of the present invention.

  INDUSTRIAL APPLICABILITY The present invention can be suitably used for a disk-shaped grindstone and a grinder that grind a material to be ground such as stone or concrete.

DESCRIPTION OF SYMBOLS 1 Grinder 2 Rotating shaft axis 3 Screw 10 Disc-shaped grindstone 11 Substrate 11a Outer peripheral end (outer periphery)
12 Grinding layer 12a Individual grinding layer 20 Material to be ground 21 Wall portion 22 Flat portion 23 Corner portion

Claims (3)

In the disc-shaped grindstone in which a grinding layer having abrasive grains is bonded to the outer peripheral portion of the surface of the disk-shaped substrate,
The disc-shaped grindstone, wherein the grinding layer is bonded to the substrate so as to protrude outward from the outer periphery of the disc-shaped substrate. The grinding layer is composed of a plurality of individual grinding layers bonded to the outer peripheral portion of the surface of the substrate,
2. The disk-shaped grindstone according to claim 1, wherein the plurality of individual grinding layers are bonded radially along a radial direction of the disk-shaped substrate.   A grinder comprising the disk-shaped grindstone according to claim 1.

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