Rapid assessment method for usability of gearbox cover cap

Abstract

The invention provides a rapid assessment method for usability of a gearbox cover cap. The method comprises the following steps: performing a high-low temperature heat cycle test for a test gearbox cover cap; measuring the free flatness of a sealing surface of the test gearbox cover cap, the clamping flatness of the sealing surface and the depth of a seal groove before and after the high-low temperature heat cycle test, and determining whether each measuring result exceeds the corresponding allowable value; calculating the corresponding measured value and difference before and after the high-low temperature heat cycle test, and determining whether the measured value and the difference exceed the corresponding allowable values; and performing a sealing test for the gearbox cover cap after the high-low temperature heat cycle test. The rapid assessment method for usability of a gearbox cover cap can know well about the deformation situation of the gearbox cover cap in the high-low temperature heat cycle test, and can determine whether the gearbox cover cap is qualified by comparison with the corresponding allowable value so as to reduce the required time period and the total assessment period of the high-low temperature heat cycle test, and is also simple in operation and convenient to perform.

Description

technical field [0001] The invention relates to the field of quality inspection of auto parts, in particular to a method for quickly evaluating the service performance of a gearbox cover. Background technique [0002] The gearbox is the main component of the car, which is divided into manual and automatic. The manual transmission is mainly composed of gears and shafts, which generate variable speed and torque through different gear combinations; while the automatic transmission is composed of hydraulic torque converters, planetary gears and hydraulic control systems, through hydraulic transmission and gear combinations. To achieve variable speed and torque. The gearbox cover mounted on the upper end of the gearbox is usually made of plastic and obtained by injection moulding. When using a new mold to process a gearbox cover, it is usually necessary to evaluate the performance of the newly machined gearbox cover to ensure that the product can meet the use requirements in lo...

AI Technical Summary

Problems solved by technology

The evaluation standard takes a long time (about 12.3 weeks) for the high and low temperature cycle test, which also leads to a long evaluation period of the evaluation standard and high test costs; if it is stipulated that each pair of new molds needs to be completed GMW3155 test verification, the product development progress will inevitably be delayed due to factors such as test bench resources, which will have a negative impact on the new product development progress; and gearbox lubricating oil injected into the gearbox housing, which makes it difficult to implement the test method

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