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Analysis of the Effect of Deformations on the Accuracy of Advanced Engineering Products

In the manufacture of thin-walled special products, errors in the profile of the finished surfaces usually appear, even if all known recommendations and the technological process are followed. In many cases, this is due to the manifestations of the transfer of manufacturing errors, through the distribution of residual stresses generated in the operation of obtaining a workpiece. According to the theory of technological inheritance of errors, when the allowance is removed from the machined surface, stress distribution in the workpiece also occurs, and this can lead to distortion of the shape of the base surface when the product is unfastened. To clarify this hypothesis, a number of experiments were made in production, in which both the processed and the base surfaces of the workpiece were investigated. The results showed that immediately after processing, the error in the profile of the processed surface at the point of fixation tends to zero, and during the fixing, errors occur, and these errors are an order of magnitude smaller than before processing. At the maximum distance from the attachment point, the picture changes: after processing, there are minor profile errors, which disappear after the attachment. The assumption about the distortion of the shape of the base surface relative to the initial one was confirmed. The angular position of the errors relative to the initial one has changed, and the size has also decreased by 0.02 mm.