| TANG Qing-chun,ZHOU Ze-xi,WANG Yu-tao,XIE Dong.3D Tool Error Compensation[J],47(7):96-103 |
| 3D Tool Error Compensation |
| Received:January 19, 2018 Revised:July 20, 2018 |
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| DOI：10.16490/j.cnki.issn.1001-3660.2018.07.013 |
| KeyWord:five axis linkage 3D tool error compensation post processing surface quality |
| Author | Institution |
| TANG Qing-chun |
Engineering Training Center, Guangxi University of Technology, Liuzhou , China |
| ZHOU Ze-xi |
Engineering Training Center, Guangxi University of Technology, Liuzhou , China |
| WANG Yu-tao |
Engineering Training Center, Guangxi University of Technology, Liuzhou , China |
| XIE Dong |
Engineering Training Center, Guangxi University of Technology, Liuzhou , China |
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| Abstract: |
| The work aims to study the tool error compensation method in 3D state to improve the surface profile precision of multi axis machining complex free-form surface. The contact mode between tool and workpiece, the tool center point, the tool contact point position and the vector in the five axis machining were analyzed to deduce the mathematical model of space tool error compensation and the compensation algorithm was verified by MATLAB. Based on the kinematic model of five axis machine tools and combining with the tool error compensation model, a special post processor with the function of tool error compensation was developed. The G code was converted by the developed special post processing software. The simulation and actual cutting experiments were carried out with a blade sample and the experimental results were analyzed. From the results, the same surface quality and contour accuracy under the theoretical tool dimension could be obtained through reasonable tool error compensation method in complex surface machining. The smaller the tool error compensation value was, the better the compensation effect could be achieved and the closer the processing effect approximated to the theoretical result. The blade specimens were simulated for machining by f8, f9, f 9.5 and f10, respectively. Compared with the theoretical machining data ofφ10 tool, the residual error values of tools in three dimensions after compensation machining were 0.08, 0.06 and 0.04 mm, respectively, and the error compensation machining of f9.5 tool error was closest to the theoretical results. The same cutting effect as that of the theoretical tool can be obtained by 3D tool error compensation method to improve the surface quality of parts effectively. The error compensation method can be used to obtain stable contour accuracy of complex parts and reduce the auxiliary time. The error compensation effect is related to the size of the actual compensation value, so the smaller the compensation value is, the better the compensation effect can be achieved. |
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