| 摘要 |
PROBLEM TO BE SOLVED: To provide a valve finisher which can prevent chips from entering a gap part between a cylinder head body and a seat guide with a simple structure. SOLUTION: In the valve finisher, a substantially cylindrical seat guide is inserted and fixed to the cylinder head body to work a cylinder head having the gap part formed between the cylinder head body and the seat guide. The valve finisher includes a body, a gun reamer protruding from the body and inserted into a through-hole of the seat guide and a substantially cylindrical bush for externally fitting and supporting a root part of the gun reamer. The bush has an entry preventing mechanism for preventing the chips from entering the gap part. The entry preventing mechanism includes a supply passage of coolant formed in the bush and a jet port of the coolant formed in an end of the bush, or includes a protruding part extending from the end of the bush to close an inlet of the gap part, or includes both cases. COPYRIGHT: (C)2011,JPO&INPIT |
