Precision self-diagnosis method of double-five-axis mirror milling machine tool

Abstract

The invention discloses a precision self-diagnosis method of a double-five-axis mirror milling machine tool. The precision self-diagnosis method comprises the steps that automatic zero point detectionbased on a three-coordinate measuring head and a self-diagnosis testing tool is adopted to carry out position detection on the tool to calculate zero return deviation so that the geometric precisionof the machine tool can be diagnosed; a ball-bar is used for obtaining the machine tool movement contour error so as to diagnose the machine tool spatial contour precision; and the precision of a sensor is evaluated according to the testing result of the tool process position tested by a line laser contour instrument, and the measurement and control sensor precision of the mirror milling machine tool is diagnosed. According to the method, the state characteristics of the double-five-axis mirror milling machine tool are extracted according to production requirements, and the machine tool precision is diagnosed from three aspects of machine tool geometric precision, spatial contour precision and measurement and control sensor precision, so that the diagnosis efficiency is improved on the premise of guaranteeing the evaluation precision, and the self-evaluation of the periodic operation health state of the machine tool is completed.

Description

technical field [0001] The invention relates to the fields of machinery and numerical control machine tools, in particular to a precision self-diagnosis method for a dual five-axis mirror milling machine tool. Background technique [0002] The dual five-axis mirror milling machine is used to realize the thickness milling, internal and external contour milling, drilling and milling functions of curved metal skin parts, and realize the high-speed, high-precision and pollution-free mechanical milling of large curved surface skin parts. [0003] In the dual five-axis mirror milling machine, in addition to the spindle tool on the skin processing side, there will be some non-scratch support heads on the other side, such as figure 1 shown. During the machining process, the tool swing head and the support swing head will move together along the skin surface, and the direction is mirror-symmetrical to the curved surface, so as to ensure that the whole process of machining is always ...

AI Technical Summary

Problems solved by technology

[0004] The existing accuracy detection methods are all aimed at five-axis machining centers or large-scale gantry machine tools, all of which are single five-axis detection, and lack the means to detect the evaluation indicators such as motion synchronization accuracy of the above-mentioned dual five-axis structure.

In addition, based on the mathematical basis of probability and mathematical statistics, the use of large samples with probability repeatability to determine the failure distribution of the same batch of equipment lacks the accuracy evaluation for a single machine tool.

[0005] At the same time, since the skin will be deformed after being clamped on the dual five-axis mirror milling machine, it is necessary to scan the contour with a line laser profiler before processing. The existing patent lacks the in-situ detection accuracy diagnostic calibration of the line laser profiler

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