Abstract
S-shaped test piece is used to assess the performance of five-axis numerical control machine tools. Compared to traditional test method and test pieces, it performs better and was agreed to be included in the draft international standard at the 79th ISO/TC39SC2 meeting. However, the lack of theoretical research is the barrier to apply for standard and to be widely used. Therefore, this paper aims to study one of the theoretical research that how to choose the suitable tool diameter. We proposed a new research method based on software AdvantEdge, Vector Method for error calculation, Microelement Model of cutting force and deformation model of cantilever beam. The simulation results show that the 20 ≤ diameter < 30 is the proper choices and the 20 is the best choice, which is consistent with the empirical consequence. This method not only provides the theoretical support for the S-shaped test piece, but also can be applied to other parts with complex curved surfaces.
Highlights
S-shaped test piece,[1,2] proposed by Chengdu Aircraft Industry Group, is a standard test piece and can be used for comprehensive testing of five axis machine tools. This standard specimen aims at solving the problem that machining parts with complex surfaces may be unqualified when the machine tool has passed the traditional test method
Through the newly proposed S-shaped test piece, the performance of the qualified machine tools can meet the processing requirements. This test piece was included in the draft standard (DIS) at the 79th ISO/TC39SC2 meeting in May 2016.5
The proposed S-shaped test piece is of great significance for the accuracy inspection and performance evaluation of five axis machine tools
Summary
S-shaped test piece,[1,2] proposed by Chengdu Aircraft Industry Group, is a standard test piece and can be used for comprehensive testing of five axis machine tools. Five-axis machine tool is different from threeaxis one, so the previous detection methods (e.g. Rtest3) or test pieces (e.g. NAS specimen4) cannot reflect the processing performance of five-axis machine accurately. Even though in these methods or sample testing qualified basis, Out-of-roundness-tolerance parts will still exist when processing. This test piece was included in the draft standard (DIS) at the 79th ISO/TC39SC2 meeting in May 2016.5
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