| 摘要 |
PROBLEM TO BE SOLVED: To provide a composite tool for hole processing capable of freely regulating the depth of a hole and the depth of a spot facing corresponding to the situation of a work site and also having high durability, in a tool for processing a structure such as concrete or the like to form a spot facing. SOLUTION: A core bit, wherein a diamond chip is bonded to one end of a cylindrical base metal, and a grinding wheel, wherein a diamond chip is bonded to the single side end surface of a disc-shaped substrate having a tapered attaching hole having a diameter larger than the outer diameter of the base metal, are used as a processing tool. A plurality of fixing members, which are formed by dividing a cylindrical member having a tapered outer peripheral surface, are inserted in the space between both of the core bit and the grinding wheel to be integrally fixed to both of them to obtain a composite tool for hole processing. COPYRIGHT: (C)2004,JPO&NCIPI
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