Diamond turning free-form surface route generation method and system and related components

Abstract

The invention discloses a diamond turning free-form surface route generation method. The method includes the following steps: firstly, obtaining a fitting curve equation of helix coil numbers and helix radiuses according to a tool radius and a tool mark residual height; substituting the obtained fitting curve equation into a free-form surface equation of a target workpiece to obtain a function ofone variable, and determining to-be-processed points on the target workpiece on the function of one variable by using an interpolation error theory; and finally, obtaining all tool locations by tool radius compensation and generating a turning route. The method can generate the processing route according to shape characteristics of the to-be-processed workpiece and processing error requirements, greatly reduce the number of data points, and make interpolation errors of all parts of the processed workpiece uniform, thereby improving the quality of turning processing. The invention also discloses a diamond turning free-form surface route generation system, a computer readable storage medium and diamond turning equipment which have the above beneficial effects.

Description

technical field [0001] The present invention relates to the technical field of manufacturing optical free-form surfaces, in particular to a method and system for generating a path for free-form surfaces in diamond turning, a computer-readable storage medium, and diamond turning equipment. Background technique [0002] With the improvement of optical design level, free-form surface optical system is more and more applied to imaging system and non-imaging optical system. Different from the traditional optical processing technology, the slow tool servo turning free-form surface technology, as one of the technical means that can efficiently and quickly achieve submicron-level surface accuracy and nano-level surface roughness, has been more and more popular since it was proposed in the 1990s. attention of many scholars. In order to meet the growing demand and further improve the precision of slow tool servo turning technology, researchers have invested a lot of energy to optimiz...

AI Technical Summary

Problems solved by technology

However, when the existing commercial free-form surface programming software is aimed at large-diameter free-form surfaces, in order to ensure sufficient interpolation accuracy for the outer ring part, the point density of the inner ring part needs to be the same as that of the outer ring, which leads to large-diameter free-form surface The data points are extremely large, seriously exceeding the current CNC memory

In addition, for a free-form surface with large fluctuations in surface shape, the slope of each part of the surface varies greatly, and the point density at uniform intervals will inevitably cause the interpolation accuracy of each part on the free-form surface to be different, which results in different values ​​on the free-form surface. The processing accuracy of the parts is the same, resulting in unsatisfactory turning effect

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