ROTARY CUTTING TOOL

• Main Author: NAKAI KOICHI
• Format: Patent
• Language: English; Japanese
• Published: 08.11.2022
• Subjects: GRINDING; PERFORMING OPERATIONS; POLISHING; TOOLS FOR GRINDING, BUFFING, OR SHARPENING; TRANSPORTING; WORKING CEMENT, CLAY, OR STONE; WORKING STONE OR STONE-LIKE MATERIALS

To provide a rotary cutting tool which can inhibit chipping occurring in a workpiece when the workpiece, such as tiles for wall decoration, is cut.SOLUTION: A rotary cutting tool has: a circular substrate; and a blade part 3 provided at an outer periphery of the circular substrate. The blade part 3 has: a blade part body 31 formed of a rigid material; and a covering layer 32 which covers a side surface of the blade part body 31. The blade part body 31 has multiple recessed parts 312 extending in a radial direction of the circular substrate on its side surface. The covering layer 32 is formed of a material having abrasiveness higher than that of the blade part body 31 and has fitting protrusion parts 321 which respectively fit into the multiple recessed parts 312. The side surface of the blade part body 31 is covered with the covering layer 32 having abrasiveness higher than that of the blade part body 31 to inhibit chipping occurring in a workpiece such as a tile for wall decoration.SELECTED DRAWING: Figure 5 【課題】壁装飾用タイル等の被加工材を切断する際に被加工材に生じるチッピングを抑制することができる回転切断工具を提供する。【解決手段】回転切断工具は、円形基板と、円形基板の外周に設けられた刃部３を有している。刃部３は、硬質材料からなる刃部本体３１と、刃部本体３１の側面を被覆する被覆層３２とを有している。刃部本体３１は、その側面に円形基板の径方向に延びる複数の凹部３１２を有している。被覆層３２は、刃部本体３１よりも摩耗性の高い材料からなるとともに、複数の凹部３１２に嵌合する嵌合凸部３２１を有している。刃部本体３１の側面を刃部本体３１よりも摩耗性の高い被覆層３２で被覆したことにより、壁装飾用タイル等の被加工材に生じるチッピングを抑制することができる。【選択図】図５