Ultra-precise force-position hybrid numerical control system

Abstract

The invention relates to an ultra-precision force-position hybrid numerical control system which is suitable for a T3-configuration ultra-precision free-form surface grinding machine and is in data communication with an ultra-precision grinding machine servo driving system. And the numerical control system can realize few-axis cambered surface grinding of a free-form surface by replacing five axes with three axes. The numerical control system comprises a software part and a hardware part. A relative coordinate system is changed, and the software part can realize grinding motion control of any shaft inclination angle; according to the grinding force measured by the three-dimensional force sensor, the software part adjusts the feeding speed in real time, online control over the grinding force is achieved, and subsurface damage is reduced. The hardware part comprises a main processor and a motion control processor. The main processor serves as a development platform and is loaded with various application programs and a software part of a numerical control system; the motion control processor is used for executing real-time tasks of interpretation, interpolation and position control; and the two are connected through an industrial Ethernet. And the subsurface damage is reduced while the high-precision surface type is obtained.

Description

technical field [0001] The invention relates to the technical field of numerical control, in particular to a numerical control system for a T3 configuration ultra-precision grinding machine. Background technique [0002] Optical large mirrors are widely used in strategic major deployments of national security and scientific development, high-precision optics [0003] Large mirror manufacturing technology has always been a difficult and hot spot in today's optical manufacturing. Compared with grinding, grinding and polishing, due to the long processing cycle, modern optical mirror processing adopts the technical process of grinding instead of grinding. Using the characteristics of higher removal rate of grinding than grinding, the workpiece is subjected to rough grinding, semi-finishing and fine grinding. Ultra-precision rapid grinding and forming. [0004] Compared with the few-axis grinding, the traditional five-axis aspherical optical parts grinding has a large number of...

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Problems solved by technology

[0006] However, the existing T3 configuration CNC system cannot realize the function of changing the origin of the relative coordinate system and steering to the grinding motion control at any axis inclination angle, the function of online control of the grinding force through the self-adjustment of the feed speed, and the function of controlling the grinding force through the few-axis arc surface. Grinding as a replacement for 5-axis free-form surface grinding

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