Crankshaft remanufacture life evaluation test method

Abstract

The invention provides a crankshaft remanufacture life evaluation test method. The method comprises the following steps: step one, measuring the crack area of a retired crankshaft; step two, determining the residual fatigue life of the retired crankshaft according to the relationship between the crack area and the residual fatigue life. By measuring the crack area of a retired crankshaft, the residual fatigue life of the retired crankshaft can be determined according to the corresponding relationship between the crack area and the residual fatigue life; compared to the prior art, not only the crack initial life is taken into account, but also the crack growth life is also considered, and thus the crankshaft remanufacture life can be evaluated more reliably.

Description

technical field [0001] The invention relates to the field of remanufacturing, in particular to a test method for evaluating the remanufacturing life of a crankshaft. 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...

AI Technical Summary

Problems solved by technology

In fact, the surface magnetic signal of the decommissioned crankshaft contains more random factors due to the previous service history, and there is a large individual difference with the surface magnetic signal of the new crankshaft. It is not yet clear which characteristic components of the surface magnetic signal of the decommissioned crankshaft are in the The fatigue damage process is the dominant factor. Therefore, the reliability of the general application of the corresponding relationship between the surface magnetic signal of the new crankshaft and the remaining fatigue life to the damage assessment of the retired crankshaft is still to be discussed.

[0007] In summary, there is currently no patent literature that can comprehensively cover the complete crankshaft remanufacturing life assessment work

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