Patent ID: 8747030
Filing Date: 2014-06-10
Classification: B23C,B23F,Y10T

Abstract:
1. A tool head for cutting bevel gears, comprising: a disk shaped main head body in which installation holes having a first reference surface and second reference surface in one corner thereof are formed in a thickness direction of said main head body; blades having a base section with a cross-section formed into a quadrangular shape that is inserted in the installation holes of said main head body, and cutting portions that are continuous with said base sections and that protrude from one end surface of said main head body; and fastening mechanisms having a pressing member that are installed in said main head body and fasten said blades by pressing with a first pressing surface and a second pressing surface of the pressing member, a first surface and a second surface in one first corner formed on the base sections of said blades against said first reference surface and said second reference surface, the first pressing surface and the second pressing surface coming in contact with a second corner on the base sections formed oppositely to the first corner; wherein said first reference surface and said second reference surface are formed oppositely to said first corner, and in a direction such that at least a majority of a cutting load acting on said blades acts in a direction toward said corner formed by said first reference surface and said second reference surface.