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| Universal Post-processing for Five-axis 3D Printing |
| RAO Yongjian1,3;FU Guoqiang1,2,3;TAO Chun1,3;GAO Hongli1,3;DENG Xiaolei4 |
1. School of Mechanical Engineering, Southwest Jiaotong University, Chengdu, 610031
2. State Key Laboratory of Fluid Power and Mechatronic Systems, Zhejiang University, Hangzhou, 310027
3. Engineering Research Center of Advanced Driving Energy-saving Technology, Ministry of Education, Southwest Jiaotong University, Chengdu, 610031
4. Key Laboratory of Air-driven Equipment Technology of Zhejiang Province, Quzhou University, Quzhou, Zhejiang, 324000 |
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Abstract Firstly, the structural parameters of the printer were introduced to represent the positions of two rotational axes and the workpiece in frame coordinate system. The general forward kinematics model of table-tilting five-axis 3D printer was established by exponential product theory. Secondly, the specific expressions of double solution of the rotational axis angles were obtained by combining the periodicity of the trigonometric function, the rotational axis travel and the five-axis structure features. The selection principle was proposed to obtain the optimal combination of the rotational axis angles based on the shortest path of the rotational angle. The displacements of each translational axis were obtained by the selected rotational axis angles. All the motions obtained were absolute motions based on zero position of each axis, and then the NC printing codes used directly for machining were generated, which might be processed without the help of rotational tool center point functions. Then, the general post-processing method was studied in combination with three different types of five-axis 3D printers: table-tilting, spindle/table-tilting, and spindle-tilting. Finally, the proposed method was applied for five-axis 3D printing, five-axis CNC machining experiments and five-axis machining simulations of various structure types were carried out to verify the correctness and generality of the method.
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