Method for manufacturing rotary grinding wheel

Abstract

To provide a method for manufacturing a rotary grinding wheel facilitating the manufacture; and also provide a method for manufacturing a rotary grinding wheel facilitating selection of physical properties of a binder.SOLUTION: A method for manufacturing a rotary grinding wheel of the present disclosure comprises the steps of: mixing ceramic abrasive grains with pellets of a thermoplastic elastomer (S11); and injection-molding the mixture of the pellets of the thermoplastic elastomer and the ceramic abrasive grains into a shape of the rotary grinding wheel (S12).SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a method for manufacturing a rotary grinding wheel.

Background Art

[0002] Patent Document 1 describes a rotary grinding wheel in which an abrasive grain layer is adhesively provided on the outer peripheral surface of an impact absorption layer as an elastic material made of a thermosetting polyester resin or the like.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, in the method for manufacturing a rotary grinding wheel described in Patent Document 1, after manufacturing an abrasive grain layer by firing a mixture of abrasive grains and a binder such as a resin bond mainly composed of a thermosetting resin, it is adhered to the outer periphery of the impact absorption layer.

[0005] In such a manufacturing method, there is a problem that the number of manufacturing steps increases. There is also a problem that it is difficult to select the physical properties of the impact absorption layer and the binder, such as the need to combine both the elasticity of the impact absorption layer and the elasticity of the binder to obtain an elastic modulus suitable for the abrasive grains.

Means for Solving the Problems

[0006] A method for manufacturing a rotary grinding wheel according to one embodiment mixes ceramic abrasive grains with pellets of a thermoplastic elastomer and injection-molds this mixture into the shape of a rotary grinding wheel.

Effects of the Invention

[0007] According to the method for manufacturing a rotary grinding wheel of the present disclosure, manufacturing becomes easy. Also, the selection of the physical properties of the binder becomes easy.

Brief Description of the Drawings

[0008]

Figure 1

Embodiments for Carrying Out the Invention

[0009] This embodiment Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. FIG. 1 is a flowchart showing an example of the method for manufacturing a rotary grinding wheel according to this embodiment.

[0010] First, in step S11, ceramic abrasive grains are mixed with pellets of a thermoplastic elastomer. The pellets of the thermoplastic elastomer to be mixed are rice grain size, and the ceramic abrasive grains have a particle size of 20 μm. After mixing, the process proceeds to step S12. Note that this thermoplastic elastomer preferably satisfies the requirements of a polishing tool. Specifically, this thermoplastic elastomer has the following characteristics. ·Characteristic 1. The flexural modulus is about 230 to 620 MPa ·Characteristic 2. The heat distortion temperature is 100°C or higher ·Characteristic 3. The water absorption rate is as low as 0.3% These characteristics of this thermoplastic elastomer satisfy the following requirements of a polishing tool. ·Requirement 1. The flexural modulus that follows the workpiece and does not allow the abrasive grains to be buried is 200 to 1000 MPa ·Requirement 2. The heat resistance temperature needs to be higher than the heat during processing (about 50°C) ·Requirement 3. Water absorption that is difficult to swell is required Also, this thermoplastic elastomer has a melting point of about 220°C, which is a melting point at which injection molding can be performed.

[0011] In step S12, a mixture of pellets of the thermoplastic elastomer and the ceramic abrasive grains is injection-molded into the shape of a rotary grinding wheel by an injection molding machine. Specifically, the shape of the rotary grinding wheel is a disk shape with a hole near the rotation axis.

[0012] Thus, according to the method for manufacturing a rotary grinding wheel according to this embodiment, injection molding is possible by using a thermoplastic resin, and the manufacturing becomes easy. Further, according to the method for manufacturing a rotary grinding wheel according to this embodiment, since the binder and the shock-absorbing layer are integrally formed, the selection of the physical properties of the binder becomes easy.

[0013] Note that the present disclosure is not limited to the above embodiment, and can be appropriately changed without departing from the gist. For example, the rotary grinding wheel manufactured by the method for manufacturing a rotary grinding wheel of the present disclosure can be used for grinding the tooth surface of a gear. By using the rotary grinding wheel of the present disclosure, the roughness of the tooth surface of the gear can be reduced, and the transmission efficiency can be improved. Further, effects such as improvement of the strength of the tooth surface are expected. Further, when a tool manufactured by injection molding is formed into the shape of a gear by a dresser or the like, it can also be applied to the grinding process of the gear.

[0014] Further, the rotary grinding wheel manufactured by the method for manufacturing a rotary grinding wheel of the present disclosure can be used for polishing a curved surface. By using the rotary grinding wheel of the present disclosure, by adjusting the hardness of the binder according to the curvature, polishing can be performed following the curved surface without forming a shape on the grinding wheel side.

Claims

【Claim 1】 Mixing ceramic abrasive grains into pellets of a thermoplastic elastomer, A method for manufacturing a rotary grinding wheel, which comprises injection molding a mixture of the pellets of the thermoplastic elastomer and the ceramic abrasive grains into the shape of a rotary grinding wheel.

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