Method for calculating control residual stress processing parameters via parameter inversion

Abstract

The invention belongs to the field of processing residual stress, and discloses a method for calculating control residual stress processing parameters via parameter inversion. The method comprises the steps of: (a) acquiring a feature index expressing the residual stress distribution characteristic from a residual stress distribution curve; (b) respectively presetting initial values of the control residual stress processing parameters, calculating the initial value of the feature index, drawing a curve of the feature index along with the change of the processing parameters and obtaining a fitting curve; (c) respectively establishing a relation between respective feature increment of the processing parameters and the fitting curve; and (d) assigning the values and performing inversion calculation to obtain the required processing parameters. The method realizes quantitative control of the processing residual stress, is simple and convenient in operation, reduces the test number, reduces the production cost, improves the processing residual stress distribution of workpieces, and prolongs the anti-fatigue life of parts.

Description

technical field [0001] The invention belongs to the field of machining residual stress, and more particularly, relates to a method for adjusting and controlling residual stress machining parameters through parameter inversion calculation. Background technique [0002] The residual stress distribution of the machined surface layer of the workpiece has a significant impact on the corrosion resistance and fatigue life of the parts. The surface residual tensile stress easily induces the corrosion fatigue crack growth, thereby reducing the service life of the parts; while the surface residual compressive stress is conducive to slowing the corrosion fatigue crack growth. , thereby extending the service life of the parts. When the machining process is the last process, the residual stress distribution of the machined surface layer has a direct impact on the service life of the part, while the distribution of machining residual stress is affected by the machining parameters (includi...

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Problems solved by technology

[0004] In view of the above defects or improvement needs of the prior art, the present invention provides a method for controlling the processing parameters of residual stress through parameter inversion calculation, and calculates the parameters affecting the residual stress through the inversion equation group, so that the residual stress after processing reaches Preset value, thus solving the technical problem of quantitative regulation of residual stress

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