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Controlling computerized numerical control (CNC) high-quality aspheric surface forming control method and hardware system

A high-order aspheric surface and digital control technology, which is applied in the direction of optical components, optics, lenses, etc., can solve problems such as surface corrugation theoretical errors, and achieve the effect of improving processing efficiency

Inactive Publication Date: 2011-05-11
CHANGCHUN UNIV OF SCI & TECH +2
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AI Technical Summary

Problems solved by technology

At present, the NC forming principle of the existing aspheric machine tools at home and abroad is the position interpolation NC principle of two-axis linkage. This NC forming principle itself has a theoretical error in the formation of surface corrugations.

Method used

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  • Controlling computerized numerical control (CNC) high-quality aspheric surface forming control method and hardware system
  • Controlling computerized numerical control (CNC) high-quality aspheric surface forming control method and hardware system
  • Controlling computerized numerical control (CNC) high-quality aspheric surface forming control method and hardware system

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Embodiment Construction

[0028] Such as figure 1 , figure 2 and image 3 The principle of the broken line close to the given curve of the optical design that can be obtained by the current position interpolation numerical control principle shown in the figure is illustrated by the position interpolation numerical control principle, and the continuous smooth curve track cannot be obtained theoretically.

[0029] Such as Figure 4 and Figure 5It is shown that on the trajectory formed by the pulse increment interpolation principle and the digital sampling interpolation principle with theoretical ripple errors, the ripples caused by the geometric factors of the superimposed grinding wheel will produce more complex ripples.

[0030] Such as Figure 6 In the method shown in the embodiment of the present invention, in each time period, the grinding wheel shaft rotates at the center at a certain angle, and at the same time moves along the X axis and moves along the Y axis to form a continuous, smooth an...

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Abstract

The invention provides a digital control method for realizing tangent-process forming of high-quality aspheric surface by three-axis linkage based on a speed interpolation principle, and a hardware system. The hardware control system adopts a universal motion and automation controller (UMAC) with a multi-axis linkage function and an electronic cam algorithm to acquire accurate time interval to ensure the synchronization of three-axis linkage, and adopts a position-velocity-time (PVT) speed interpolation algorithm to eliminate inflection point smooth transition of actual machining curve at the positions of nodes and position overstrike and to make interpolation nodes constantly keep the continuous change in the feeding speed of grinding wheels and the moving direction and the tangent direction at a point consistent to form a high-precision continuous smooth aspheric surface, and thus, the machining efficiency of the aspheric surface is increased and the machining cost of the aspheric surface is lowered.

Description

technical field [0001] The invention relates to a digital control method and a hardware system for realizing high-order aspheric surface forming by tangential method through three-axis linkage based on the principle of speed interpolation. Background technique [0002] Numerical control technology has been widely used in various control fields, such as aerospace, automobiles, transportation, communications, electronics, positioning and tracking systems, robots, high-precision processing equipment, and assembly lines. In the field of optical parts processing, technologies such as CNC turning, CNC grinding and CNC polishing have been used to process high-precision aspheric optical parts. A variety of CNC machining optical aspheric machine tools have been developed at home and abroad to be applied. At present, the processing efficiency of CNC processing optical aspheric surface technology has been greatly improved compared with the traditional manual processing of aspheric surf...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B24B13/06
Inventor 于正林耿振野轩洋顾莉栋于化东朴承镐
Owner CHANGCHUN UNIV OF SCI & TECH
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