Shearing algorithm and device for the continuous carbon fiber 3D printing

The combination of the carbon fiber composite and 3D printing technology can be a powerful approach to produce the high-strength light-weight and complex construction mechanical parts. Compared with the short carbon fiber which has been widely used, application of continuous carbon fiber in 3D printing can undoubtedly better play its good mechanical properties. Usually, complex parts include multiple independent contours, which lead to discontinuous paths in the 3D printing process. For the continuity characters of the continuous carbon fiber composite, it needs to be sheared off due to the discontinuous molding printing path, so as to ensure the quality of the forming process. To solve this problem, a shearing method is put forward and the shearing device is realized. Based on the 3D printing planning path by the slicing process, the actual shearing position is calculated by shearing position recognition and distance compensation between the jump and the shearing point. On the basis of this method, the corresponding shearing device is designed to build a shearing system. The accuracy and feasibility of the continuous carbon fiber shearing system is verified by simulation analysis of path jump and single-layer and multi-layer model 3D printing experiment. The method provides basis for the realization of continuous carbon fiber composites 3D printing.