| 摘要 |
PROBLEM TO BE SOLVED: To provide a cutter bit capable of reducing the risk of damage to an excavator etc. by decreasing the frequency of replacement associated with abrasion. SOLUTION: The cutter bit 1 includes a bit body 10, a plurality of blade portions 11 which are superposed on the bit body 10, an abrasion adjusting material 12 which is interposed between the blade portions 11, and a fixing portion 13 for fixing an end of the blade portion 11. The abrasion adjusting material 12 is made of a material which has the material property of wearing out easily than the fixing portion 13 and which is equipped with a function of a heat stress relaxation material when the blade portion 11 and the fixing portion 13 are joined together. The fixing portion 13 is made of a material which wears out easily than the blade portion 11 and which has rigidity and strength sufficient for a structural member. COPYRIGHT: (C)2010,JPO&INPIT |
