RTCP calibration and compensation method for five-axis NC machine tool of double-pendulum-head structure

Abstract

The invention discloses an RTCP calibration and compensation method for a five-axis NC machine tool of a double-pendulum-head structure. The method comprises the steps of recording the calibrated coordinate values of each rotating shaft at different angle positions, and calculating to obtain the offset vector of each rotating shaft and the vector data of each rotating shaft in the axis direction;writing the data into corresponding machine tool parameters of a numerical control system; and activating the five-axis linkage function of the numerical control system. In this way, the problems thatthe characteristic data of the five-axis machine tool cannot be directly acquired and the precision of a traditional method is low can be effectively solved. The accuracy of calibrated data is guaranteed, and the rapidity and the accuracy of the five-axis RTCP calibration are improved. As a result, the adjustment time is shortened, and the introduction of human errors is reduced.

Description

technical field [0001] The invention belongs to the field of numerical control equipment processing, and in particular relates to an RTCP calibration and compensation method for a five-axis numerical control machine tool with a double swing head structure. Background technique [0002] The five-axis CNC machine tool is different from the traditional three-coordinate vertical machining center. On the basis of satisfying the geometric accuracy and positioning accuracy, it is also necessary to calibrate and calibrate the accuracy of the five-axis linkage, and input the corresponding data to the corresponding machine tool of the CNC system. Among the parameters, taking Siemens SINUMERIK 840D sl as an example, there are 9 corresponding machine data. The traditional adjustment method is that the machine tool manufacturer determines the above characteristic data during the mechanical structure design process and writes the data into the machine parameters. However, due to the existe...

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Problems solved by technology

[0003] This method has the following disadvantages: 1), using the ball head stick and the dial indicator will produce a large error, and it cannot guarantee that the highest point of the ball head stick is found at the same position every time, and the accuracy of the data is not high. Finally, adjust it out The error is large; 2), the adjustment process needs to be continuously corrected, trial and error, a lot of time is spent, and the efficiency is low; 3), the corresponding relationship between the data and parameters that actually need to be calibrated in the five-axis calibration cannot be accurately understood , repeat the work after the same problem occurs; 4), while increasing the work intensity of debugging and maintenance personnel, the production efficiency is reduced

The above invention cannot guarantee that the highest point of the ball stud is found at the same position each time, the accuracy of the data is not high, and the error in the final adjustment is relatively large; it is impossible to accurately understand the corresponding relationship between the data and parameters that actually need to be calibrated for five-axis calibration

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