Valve seat ring repair method

Abstract

The invention provides a valve seat ring repair method which comprises the steps that by taking a valve as a tool, a sealing conical surface of the valve is uniformly coated with a layer of abrasive paste, the valve is inserted into a valve guide pipe hole, the valve is forced with efforts to rotate back and forth in a manner of closely fitting with the sealing conical surface of a valve seat, when a complete and continuous dark grey circular band occurs on each of the valve seat and a valve grinding surface, the valve is subjected to airtightness detection, and if the valve is not qualified,an operator continues to grind the valve till the valve is qualified. The valve seat ring repair method is high in grinding precision and low in cost and is quick and convenient.

Description

technical field [0001] The invention specifically relates to a method for repairing a valve seat ring. Background technique [0002] The function of the valve is to be responsible for inputting air into the engine and discharging the exhaust gas after combustion. From the structure of the engine, it is divided into intake valve and exhaust valve. The role of the intake valve is to draw air into the engine and mix it with fuel for combustion; the role of the exhaust valve is to discharge the burned exhaust gas and dissipate heat. [0003] In recent years, engineering engines have developed towards high power, low energy consumption, and long life. These new changes in the engine have also put forward new requirements for its key components. The sealing device of the engine combustion chamber, with the continuous development of automobile engine technology, the working condition of the valve seat of the automobile engine is more severe, coupled with the popularity of unleade...

AI Technical Summary

Problems solved by technology

[0003] In recent years, engineering engines have developed towards high power, low energy consumption, and long life. These new changes in the engine have also put forward new requirements for its key components. The sealing device of the engine combustion chamber, with the continuous development of automobile engine technology, the working condition of the valve seat of the automobile engine is more severe, coupled with the popularity of unleaded gasoline and alternative fuels, due to the lack of lead lubrication between the valve and the valve seat, The commonly used high-chromium casting alloys are often unable to meet their normal work due to premature wear, resulting in valve leakage, which in turn causes engine vibration, poor cold start and other failure phenomena. Therefore, it is necessary to develop high-strength valve seat rings to meet the requirements of new fuel engines. use

[0004] After the valve seat is used for a certain period of time, different degrees of wear and tear failures often occur