Tool-path Optimization Research Of 3D Printing In Manufacturing Autobody

As "Made in China 2025" and the other national policies and measures to vigorously support,along with the huge benefits 3D printing technology can bring about, many domestic scientific research institutions inject more money and talents on this manufacturing technology. Along with the deepening of the study and actively exploration of the market, Additive Manufacturing technology is developing at full speed, becoming better and approaching perfection day by day. It has been out of the lab and has been widely used in the automotive, aerospace, industrial equipment, biomedical engineering, and other fields. "Made in China 2025" has accelerated the transformation and upgrading of China's manufacturing industry, also makes more and more manufacturing enterprises begin to keep an eye on this strategic and emerging industrie.Because of its processing and manufacturing flexibility and no need to exploit and design the mould, it has been mainly applied to the vehicle design and auto parts manufacturing in the field of automobile industry. Automobile is a mass-produced product, the machining efficiency problem of 3D printing determine that it's more suitable for the processing of the personalization and small batch production. How to improve the efficiency of 3D printing processing has become an important technical problems to be solved.In this paper, the research object is the scanning tool-path optimization problem of Zigzag in FDM process, the optimization objective is to improve the efficiency of 3D printing processing. First of all, we set up the kinematics model of 3D printing in this thesis, and studied the optimal filling and scanning direction under the constraint of the mechanism kinetic parameters. Filling and scanning speed, scanning acceleration and the scanning line width are verified the influence factors of the optimal scanning direction by illustrations. In order to solve the frequently start-stop problems of the stepper motor in the scanning line joint, the scanning line connection mode was optimized by using bezier curve. We change the kinematics model of the scanning line joint and introduce the principle of spline curve interpolation. We calculate the interpolation parameter by the use of Runge-Kutta algorithm to evaluate the feeding time in the curve joint. A regional segmentation algorithm was proposed in this paper to solve the scanning problems of slices with complex planar contour. The complex planar contour will be partitioned into several continuous processing subregions by the use of this algorithm.The algorithm reduces the tool retractions in non-processing areas such as holes in the plannar and the air-cutting only occur in the connection of the subregions.Finally, the validity and the correctness of the algorithm is verified by illustrations. The algorithm has important research significance to improve the efficiency of 3D printing.