Diamond super precision lathe free curved surface processing path generation method

Abstract

The invention belongs to the technical field of ultra-precise work and complex parts manufacturing, which relates to a path generating method of a curved face processing. The method is utilized on a diamond ultra-precise machine tool with three shafts, which comprises first, establishing a coordinate system of a free curved face model of a processing surface of a workpiece, and establishing conversion relationship between the model coordinate system and a machine tool coordinate system, second, conversing the model coordinate of a processing point on the processed free curved face to a coordinate under the coordinate system of the machine tool, third, solving and processing a normal vector of cutting face of a cutter when the point is processed, fourth, projecting the normal vector of the point of the curved face on the cutting face, and compensating a circular arc radius of the cutter on the projection vector direction, and getting a coordinate of the arc center of the cutting edge under the cutting edge coordinate system, traversing the processing point on the free curved face, at last generating a processing path. The limitation of processing the free curved face on the machine tool with three shafts can be broken by adopting the path generating method which is provided by the invention, the invention can achieve ultra-sophisticated processing of the free curved face.

Description

technical field [0001] The invention belongs to the technical field of ultra-precision machining and complex part manufacturing, and relates to a method for generating a curved surface machining path. Background technique [0002] At present, machinery and equipment in the fields of aerospace, national defense, biomedicine, optics, communication, and microelectronics are constantly developing towards ultra-precision and miniaturization while improving their performance. Therefore, freeform surface processing technology with optical quality surfaces has become a key technology to drive the development of these fields. [0003] Ultra-precision machining is the frontier field of advanced manufacturing. It is a technology that can achieve the optical quality of the processed surface, that is, the shape accuracy of the workpiece reaches the sub-micron level, and the surface roughness reaches the nano-level. Using diamond turning tools for ultra-precision turning does not require...

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Problems solved by technology

[0005] Because these two processing technologies are relatively new, so far, related research at home and abroad, including machine tool suppliers, have not provided pre- and post-processing algorithms or modules for free-form surface processing.

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