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Method for improving sealing performance of valve of cylinder head and valve potted line move-up detector

A sealing line and sealing technology, which is applied in the direction of engine components, engine testing, machine/engine, etc., can solve the problems of low production efficiency, high labor intensity, inspection of valve sealing line beating, etc.

Inactive Publication Date: 2007-05-02
YANGDONG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the diesel engine industry is still unable to check the valve sealing line jump during the production process of the cylinder head. In order to ensure the sealing performance of the cylinder head valve, the relevant assembly can only be carried out after the cylinder head is processed, and high-pressure gas is injected for inspection. Leakage is treated by grinding
This method takes a long time, labor intensity is high, and production efficiency is low.

Method used

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  • Method for improving sealing performance of valve of cylinder head and valve potted line move-up detector

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Embodiment Construction

[0011] Below by embodiment and in conjunction with accompanying drawing, further illustrate the method of the present invention and used checker:

[0012] Carry out conventional mechanical processing on the cylinder head valve first, and then use the valve seal line runout inspection tool to detect the runout of the valve seal line. If the runout is out of tolerance, further reaming and rolling are performed on the valve until it fully meets the requirements.

[0013] The inspection tools used are shown in the accompanying drawings. In the middle of the mandrel 3, there is a detection block 5 that is in sliding fit with the mandrel. The upper and lower ends of the detection block have conical surfaces 4 and 6. The angles between the two conical surfaces and the valve sealing line are the same. The lower conical surface 6 is inlaid with a cemented carbide block 7 that is higher than the conical surface. The protruding part of the alloy block is in the shape of a knife edge and i...

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Abstract

A method for improving the airtightness of cylinder cover and gas throttle includes such steps as conventionally manufacturing cylinder cover, testing the jump of sealing wire for gas throttle by using a detecting tool, and further machining the gas throttle by reaming and rolling if it is over-jump. Said detecting tool is composed of mandrel, testing block with conic surfaces on its upper and lower ends and a hard alloy cutter on lower conic surface, and dial gauge.

Description

technical field [0001] The invention relates to a process for manufacturing a cylinder head of a diesel engine, in particular to a method for improving the sealing performance of a cylinder head valve and a checker for the jumping of a valve sealing line used in the method. Background technique [0002] Cylinder head valve sealing is an important quality index of diesel engine, poor valve sealing will lead to air leakage in the combustion chamber of diesel engine, which will seriously affect the working performance of diesel engine. The valve sealing performance is directly affected by the runout of the valve sealing line. At present, the diesel engine industry is still unable to check the valve sealing line jump during the production process of the cylinder head. In order to ensure the sealing performance of the cylinder head valve, the relevant assembly can only be carried out after the cylinder head is processed, and high-pressure gas is injected for inspection. Leakage ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01L3/00G01M15/02
Inventor 崔建华陆锦林
Owner YANGDONG CO LTD
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