| 摘要 |
PROBLEM TO BE SOLVED: To provide a processing equipment of a sheet seat, capable of easily correctively processing the sheet seat of the valve sheet of the cylinder head. SOLUTION: The sheet seat is processed by conforming an axis line to the common center lines of a valve guide inserting port and a valve-opening and closing ports of the cylinder head, an axis supported by the valve guide inserting port and the valve opening and closing port via tools, respectively, setting a rotating body which is rotatable around the axis, at the axis via a rotation drive means, setting a cutting tool for processing the sheet seat of the valve to the rotating body, and making the cutting tool revolve about around the axis.
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