A detection method for c-axis linkage accuracy of multi-axis linkage double-swing head CNC milling machine

Abstract

The invention discloses a method for detecting the linkage accuracy of a C-shaft of a multi-shaft linkage double-pendulum numerical control milling machine. The method comprises the following steps that a standard linkage ball is installed on a machine tool spindle, and the working length L and the linkage ball diameter D of the standard linkage ball are set in a machine tool system; a digital display dial indicator used for data collection and data output is arranged on a machine tool bed frame, and after a measuring head of the digital display dial indicator makes contact with the standard linkage ball, the measuring head is pressed inward by a certain distance d, and the current position of the digital display dial indicator is reset to zero; a machine tool RTCP motion mode is switched on, and the C-shaft is made to rotate around the center of the standard linkage ball; the digital display dial indicator is used for collecting displacement deviation delta 1 generated between the standard linkage ball and the measuring head in the rotation process, and the value of the displacement deviation delta 1 at a certain rotation angle is the linkage accuracy of the C-shaft at the angle. The method for detecting the linkage accuracy of the C-shaft of the multi-shaft linkage double-pendulum numerical control milling machine is more rapid and effective in data collection and data analysis, and can serve as a basis for accuracy compensation of a C-shaft of a follow-up machine tool; a large number of trial cuts does not need to be conducted, a three-coordinate measuring instrument does not need to be arranged for special inspection, and therefore cost is low and efficiency is high.

Description

technical field [0001] The invention relates to a detection method for C-axis linkage accuracy of a multi-axis linkage double-oscillating head numerical control milling machine. Background technique [0002] At present, in the field of CNC machining, enterprises have put forward higher requirements for the machining accuracy and machining efficiency of equipment for processing complex structural parts. With the continuous rise and application of high-performance machining technologies such as high speed and high efficiency, enterprises gradually choose multi-axis linkage CNC Processing equipment, such as A / C, B / C multi-axis linkage double-swing head CNC milling machine, which has the characteristics of wide processing range, high precision and flexibility, and strong composite processing capability. The precision of the milling machine determines the machining accuracy of the parts. , so milling machine precision detection is a key link. [0003] The prior art is used to de...

AI Technical Summary

Problems solved by technology

The traditional detection method and the above-mentioned geometric accuracy detection standards (ISO10791-2, VDI / DGQ3441) use a dial indicator and a spindle mandrel to detect the accuracy of the C-axis, but this method cannot effectively carry out the inspection of the disjoint axes of the two swing axes. Accuracy detection, and cannot effectively collect, store and process the numerical value of the linkage accuracy at any angle position of the C-axis, the degree of automation is low, the number of repeated inspections is large, and quantitative analysis cannot be carried out; while the application of NAS979 standard and S standard test pieces The piece test method needs to go through repeated processes such as debugging, trial cutting, re-debugging, and re-trial cutting, which consumes a lot of materials, tools, and test pieces. Large, it cannot objectively reflect the precision of C-axis linkage. In addition, after the sample is cut, it needs to be moved away from the machine tool and sent to the three-coordinate measuring equipment for testing. During the process, there are deformation, warping, repositioning, etc., the accuracy loss is obvious, and the testing cost is high. long cycle

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