Novel device for compensating positioning error of numerical control machine tool in real time

Abstract

The invention relates to a novel device for compensating a positioning error of a numerical control machine tool in real time. A numerical control machine tool positioning error real-time compensator which is bias based on an external coordinate system of a machine tool comprises a computing processing module, a temperature sensor acquisition and transmission module and a numerical control interface control module, wherein a computing processing system in the computing processing module acquires a temperature signal of the numerical control machine tool and receives a machine tool coordinate position signal from the numerical control machine tool at the same time, inputs the two signals into a preset positioning error mathematical model and calculates to obtain a compensation value, and sends the compensation value into the numerical control machine tool through an interface of a numerical control system; and the motion position of the machine tool is adjusted in real time by using a bias function of the external coordinate system in the numerical control system of the machine tool so as to finish a compensation process. The device mainly finishes the compensation operation through designs of interfaces and software; the conventional numerical control system and the conventional machining program cannot be influenced; hardware is relatively simple, and software is modified flexibly; and the generality is high.

Description

technical field [0001] The invention relates to a novel real-time compensation device for positioning error of a numerical control machine tool, which can adjust the relative position of a tool and a machined part in real time, so that the numerical control machine tool can obtain higher machining accuracy. It belongs to the field of precision machine tool technology or precision machining. Background technique [0002] After years of development, my country's machine tool production has made great achievements and has become one of the major machine tool production countries. However, in terms of technical level and overall strength, it is only in the middle and front position of the second echelon in the world. At present, the CNC machine tools produced in my country account for about 31% of the domestic market share, and the rest are imported from abroad. At present, the vast majority of my country's mid-to-high-end CNC machine tool market is occupied by overseas product...

AI Technical Summary

Problems solved by technology

At present, the real-time compensation technology of CNC machine tool errors and its real-time compensators are not widely used in foreign factories and enterprises, and have not yet reached the level of commercialization; in China, they are still mainly in the laboratory stage, although there are also literatures that mention the development Compensation device, but the application implementation is complex, the scope of application is narrow, it is not universal, and it is difficult to promote practical application

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