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发明申请
US20070277911A1 Surface Modifying Jig Of Engine Valve And Surface Modifying Method Employing It 失效
发动机阀门表面改性夹具及其表面改性方法

Surface Modifying Jig Of Engine Valve And Surface Modifying Method Employing It
摘要：
A surface modifying jig of an engine valve comprising a substantially circular ring portion for holding the valve head of an engine valve, a head holding portion having a diameter decreasing gradually downward from the inner circumferential side of the ring portion, and a stem holding portion formed below the head holding portion with a substantially constant diameter. When plasma nitriding is performed, the valve head comes into annular line contact with the ring portion and being held by the head holding portion while kept in annular plane contact therewith, and a valve stem is held by the stem holding portion while kept in annular plane contact therewith.
摘要（中）：

一种发动机阀的表面修改夹具，包括用于保持发动机气门的阀头的大致圆形的环形部分，具有从环形部分的内周侧逐渐向下减小的直径的头部保持部分和形成的杆保持部分 在头部保持部分下面具有基本恒定的直径。 当进行等离子体氮化时，阀头与环部分形成环形线接触并被头部保持部分保持，同时与其保持环形平面接触，并且阀杆由杆保持部分保持在环形平面内 与其接触。

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