Test method for performance of gearbox cover

Abstract

The invention provides a method for quickly evaluating the service performance of a gearbox cover, comprising the following steps: performing a high-low temperature thermal cycle test on the test gearbox cover; Measure the free flatness, the clamping flatness of the sealing surface, and the depth of the sealing groove, and judge whether the measurement results exceed the corresponding allowable values; calculate the corresponding measurement values ​​and differences before and after the high and low temperature thermal cycle test, and judge the measurement Whether the value and the difference exceed the corresponding allowable value; conduct a tightness test on the gearbox cover after the high and low temperature thermal cycle test. The present invention grasps the deformation of the gearbox cover in the high and low temperature thermal cycle test through various measurement results, and judges whether the gearbox cover is qualified by comparing with the corresponding allowable value, so that the high and low temperature thermal cycle test of the present invention The required time period and the overall evaluation period are relatively short; meanwhile, the present invention is relatively simple in operation and convenient for implementation.

Description

technical field [0001] The invention relates to the field of quality detection of auto parts, in particular to a method for detecting 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 long-term us...

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

Images