Crankshaft remanufacturing life assessment system and method thereof

Abstract

The invention provides a crankshaft remanufacturing life assessment system and a method thereof. The crankshaft remanufacturing life assessment system comprises: a fatigue load loading system used for loading fatigue load to an ex-service crankshaft according to preset test parameters; a machine vision detection system used for detecting the surface crack generation and the crack length of the dangerous position of the ex-service crankshaft to obtain the crack length expansion rule of the crack length with the fatigue cycle; a metallic magnetic memory detection system used for detecting the crack depth of the ex-service crankshaft to obtain the crack depth expansion rule of the crack length with the fatigue cycle; and a processing system used for calculating the crack area expansion rule of the crack area of the ex-service crankshaft with the fatigue cycle according to the crack length expansion rule and the crack depth expansion rule. The remaining fatigue life of the ex-service crankshaft is determined according to a corresponding relationship between the crack area and the remaining fatigue life, and the method is more reliable than present technologies to assess the crankshaft remanufacturing life.

Description

technical field [0001] The invention relates to the field of remanufacturing, in particular to a crankshaft remanufacturing life evaluation system and method. Background technique [0002] Remanufacturing engineering is the industrialization of high-tech maintenance of waste mechanical and electrical products, and it is an important way to develop circular economy and build an environment-friendly and resource-saving society. The remanufacturing of auto parts is the earliest pilot industry in my country to explore the key technology of remanufacturing, and the remanufacturing of the crankshaft, the core component of the engine, is one of the research focuses. [0003] Before the crankshaft is remanufactured, it is first necessary to evaluate whether its remaining life can bear a new round of service cycle. Since crankshaft fatigue failure is the most dangerous form of damage, the remaining fatigue life assessment is the core content of crankshaft remanufacturing life assess...

AI Technical Summary

Problems solved by technology

Using penetration technology, although the surface cracks can be clearly displayed, but the depth of the cracks cannot be displayed

[0005] That is, the remanufacturing life assessment scheme using penetration testing technology can only use the presence or absence of cracks or the length of cracks as the basis for whether the remaining fatigue life of the decommissioned crankshaft can maintain the next life cycle, ignoring the depth of cracks.

In addition, penetration detection technology can only be operated offline and cannot be monitored in real time. In addition, penetration detection technology requires a certain penetration time, which takes a long time and is relatively troublesome to measure

Images