Subcaliber-polishing contour route planning method

Abstract

The invention provides a subcaliber-polishing contour route planning method. Through contour routes planned by the method, the inhibition of residual errors caused by convolution reaction is facilitated. The subcaliber-polishing contour route planning method comprises the following steps: (1) obtaining initial surface-shape error distribution data; (2) calculating discrete material removal quantity progressions and generating the contour route corresponding to each removal quantity; and (3) calculating coordinates of resident points and resident time of the resident points on each contour route. The subcaliber-polishing contour route planning method is capable of obtaining the appropriate material removal quantity progressions, generating the corresponding contours, obtaining dense route spacing in an area with high processed surface material removal quantity and obtaining non-dense spacing in an area with small removal quantity, so that the problem that medium-frequency errors, low-frequency surface shape and efficient convergence are difficultly achieved at the same time when an equal-spacing grating scanning method of routes or a spiral scanning method of routes is used for processing at present can be overcome.

Description

technical field [0001] The invention belongs to the field of optical processing, in particular to a contour path planning method for sub-aperture polishing. Background technique [0002] The polishing technology of optical components is divided into sub-aperture polishing and full-aperture polishing. Full-aperture polishing uses a polishing disc larger in size than the component, and the entire surface of the component is in contact with the polishing disc during polishing; sub-aperture polishing uses a polishing tool smaller in size than the component, and selectively removes a local area of ​​the component surface through a small tool , so as to realize the correction of the overall surface shape error. During sub-aperture polishing, the CNC system of the machine tool controls the small tool to scan the entire surface of the component with a certain path, and controls the removal amount of different parts by adjusting the residence time or moving speed of the small tool o...

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Problems solved by technology

[0003] When equidistant paths are used, the scanning path spacing of the small tool in all high and low areas on the component surface is the same. At this time, choosing a smaller path spacing is beneficial to reduce the intermediate frequency ripple error caused by the convolution effect, but a smaller path spacing will It will increase the amount of excess material removal in the lowest area of ​​​​the component, which is not conducive to the convergence of surface error

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