Compensation process capable of increasing machine precision of numerical-controlled lathe and magnetic striction compensation mechanism

Abstract

The invention discloses a compensation method for enhancing the machining accuracy of a numerical control machine tool and a magnetostrictive compensation mechanism, in particular to a method for compensating the accuracy of the numerical control machine tool through combined feed and a modularized accuracy compensation mechanism. The method comprises the following steps: aiming to the machine tool, because of a geometrical error formed by a plurality of factors such as manufacture, abrasion, etc., feed errors in a full-stroke range are measured by a dual-frequency laser interferometer; the modularized compensation mechanism is driven to produce the corresponding displacement compensation quantity through power amplification after an error signal is pretreated; the micro-displacement feed is performed in cooperation with the macro displacement feed, so as to correct the accuracy of the machine tool. High-frequency vibration signals are superposed as a drive compensation mechanism for driving the voltage to perform vibration cutting, thereby effectively inhibiting a flutter phenomenon caused by friction during cutting, and enhancing the machining accuracy. An LVDT inductive displacement transducer is mounted at the tail end of an elastic micro-displacement mechanism for position feedback regulation; furthermore, the closed-loop control is formed through real-time control operation in a DSP chip to realize precise positioning.

Description

technical field [0001] The patent of the present invention relates to a method for improving machining accuracy of machine tools through compound feed and a modular error compensation device. Specifically, it relates to a method for compensating machine tool errors through micro-displacement compensation and vibration cutting generated by giant magnetostrictive actuators. And a method and a device for improving the machining accuracy of a machine tool. Background technique [0002] In the research and development process of precision and ultra-precision machining technology, precision and ultra-precision machine tools play a decisive role. The accuracy of traditional ultra-precision machine tools is mainly achieved by the accuracy of the reference components of the machine tool. However, it is very difficult to improve the machining accuracy by continuing to improve the accuracy of ultra-precision machine tool components, and some errors in machining are difficult to elimina...

AI Technical Summary

Problems solved by technology

Early ultrasonic machining mainly relied on tools for ultrasonic frequency (above 20,000 Hz) vibration, so that the abrasive in the suspension can obtain impact energy, thereby removing the workpiece material to achieve the purpose of processing. This ultrasonic machining technology is not only costly and expensive, but also its role The mechanism is also not suitable for use on machine tools

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