Cradle type five-axis machine tool rotating axes geometric error detection device and identification method

Abstract

The invention discloses a cradle type five-axis machine tool rotating axes linkage error detection device and identification method, which are on the assumption that errors of X linear axis, Y linearaxis and Z linear axis are ignored or compensated compared with errors of rotating axes. A geometric error in the two rotating axes linkage process of the five-axis machine tool changes along with thechange of combination of two rotation angles, and different rotation angle combinations correspond to different space geometric errors. The invention provides a method for detecting the geometric error of the rotary axes by carrying out on-machine measurement of three different gears on four specifically designed test columns which are installed and clamped on cross-shaped guide rails and arranged in a circular shape through a contact type trigger probe installed on a machine tool spindle. The method comprises the following steps of 1, positioning, installing and clamping a test device; 2, dividing and combining A axis motion angles and C axis motion angles; 3, determining the number of test points on the test columns of each angle combination and probe detection direction; 4, detecting the space comprehensive error of the test columns; and 5, identifying and separating to obtain an AC geometric error.

Description

technical field [0001] The invention relates to the field of error detection of a five-axis machining center, in particular to a cradle-type five-axis machine tool rotation axis linkage geometric error detection device and identification method. Background technique [0002] At present, my country's demand for high-end CNC machine tools continues to increase. However, the lack of precision of CNC machine tools has always restricted the development of five-axis CNC machine tools in China. Therefore, seeking a convenient and reliable error identification method especially for the rotation axis of five-axis machine tools has become the current research Hotspots and Difficulties. The error detection of the rotary axis of the five-axis CNC machine tool is the premise of error compensation. International and domestic researchers have set foot in this field and achieved good results. At present, the International Organization for Standardization has formulated ISO230-1~ISO230-11 ser...

AI Technical Summary

Problems solved by technology

This method can evaluate the accuracy of the machine tool and give an optimization plan that matches the accuracy of the machine tool. However, there are too many uncertain factors in the processing of "S" parts, especially the flutter phenomenon in the processing process has a high impact on the processing error. Therefore, this method is not very ideal for the detection of machine tool accuracy.

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