Evaluation method for searching and optimizing circumferential equal division hole position degree based on polar angle dichotomy

Abstract

The invention discloses an evaluation method for searching and optimizing circumferential equal division hole position degree based on polar angle dichotomy, and the method comprises: processing original position information acquired by a measuring device, fitting to obtain the actual hole center position of a part, and calculating to determine the initial pole angle difference of each hole and the rotatable angle range on the premise that the position degree error requirement is met; searching and optimizing is performed through dichotomy, optimal position degree errors of all equal divisionholes meeting the principle of the minimum condition can be obtained rapidly and accurately without tangential reference selection under the condition of undetermined tangential offset directions of the circumferential equal division holes, meanwhile, the whole searching and optimizing process is small in processing data size, and the calculation efficiency is greatly improved.

Description

technical field [0001] The invention belongs to the technical field of machining accuracy detection, and in particular relates to an evaluation method for searching and optimizing the position degree of a circular equal-divided hole based on a polar angle dichotomy method. Background technique [0002] In the machining industry, many components are usually distributed with groups of circumferentially divided holes, and the position error of the circumferentially divided holes has a direct impact on the assembly and service life of the parts. In order to ensure assembly interchangeability, the circumferential hole system generally needs to be processed very precisely. The mutual position accuracy of the holes in the circumferential hole group and the position accuracy of the hole group relative to the reference must meet the relevant requirements. In the process of parts processing, the position error will inevitably appear in the group of equally divided holes on the circumf...

AI Technical Summary

Problems solved by technology

The three-coordinate measuring machine has high measurement accuracy and strong accuracy, but the measurement cycle is long, which is suitable for offline sampling inspection of parts

This method has certain inaccuracies, because the selection of auxiliary reference holes is different, the position degree obtained is also different, and the result obtained is not the actual best position degree of each hole, which is prone to misjudgment

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