High Accuracy Detection of Automobile Engine Valve

Click:     Time:2017-06-06 16:00:25 关键字:车发动机气门杆的高精度检测

First, the car valve lever need high-precision detection

The function of the automobile engine gas distribution mechanism is to open and close the intake and exhaust doors of each cylinder in accordance with the working order of each cylinder of the engine so that the fresh flammable mixture enters the cylinder and discharges the exhaust gas from the cylinder in time. Valve rod and valve guide machining accuracy and tolerance with the level of the impact will directly affect the performance of the engine merits. If the gap between the valve stem and the catheter hole increases, it is easy to skew the valve, causing the valve to shut down and leak. When the high temperature exhaust gas through the catheter hole gap, the valve and the catheter will overheat, thereby speeding up their wear and may be due to the sintering of the lubricating oil in the catheter leaving the valve stuck and unable to move.

Accuracy detection is to ensure that the valve rod and even the entire engine performance is an important part of the valve rod shaft diameter and roundness of the valve is the detection of the most important part of the project.

Second, the car valve stem bar facing the measurement problem

According to the type and precision of the automobile valve lever, the traditional measuring tool generally uses the vernier caliper, micrometer, optical comparator and other instruments to measure the diameter and roundness of the shaft. Especially when measuring the roundness, the axis of the valve rod should be perpendicular to the measuring cross section, While maintaining the axial position in order to maintain the measurement of the dial gauge probe is located in the same measurement section, the measured parts in the process of rotation a week, the maximum reading of the difference between the half as a single roundness error. For high precision valve stem, generally use roundness meter to detect roundness error.

Third, the Swiss pole measurement solution Engine valve automatic flexible detection line relative to the traditional contact detection with the subjectivity, fatigue, slow, high cost shortcomings, the image measurement technology can achieve continuous, accurate and not Intermittent measurement, with traditional detection methods incomparable superiority, such as reducing the measurement time, providing measurement accuracy and better measurement repeatability. The tolerance of the automotive industry valve stem is accurate to the micron level and can not meet the tolerance requirements if it is measured with a conventional micrometer or other measuring or measuring instrument with a few microns. Only with a higher precision measuring instrument, Accuracy in a few micron instruments to measure, in order to meet this high-precision valve rod measurement requirements.


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