Multi Material Digital Manufacturing Technology Is Based On FDM Technology

With the rapid development of science and technology for aerospace engineering, biological engineering, industrial engineering, and micro-electromechanical systems, the higher performance of the products are in need in modern society, parts of the products manufactured by a single-phase or homogeneous material sometimes are difficult to meet the requirement of functionality or performance, which makes the design and manufacture of heterogeneous materials based on rapid prototyping be one of the frontier topics in advanced manufacturing technology field.In this thesis, exploration and research are expand on digital design and manufacture of multi-material parts which based on FDM technology. According to that the problem of the material distribution disordering inside of the heterogeneous part is difficult to express, this thesis presents a modeling method for heterogeneous materials which is based on multi-color distance field. Using the modeling method of multicolor distance field, the material information of the model is mapped into the color information of the model. This gives a method of representing the material information and the structural information of the heterogeneous material parts.Focusing on the problem of multi-material parts difficult to manufacture, a multi-material parts forming system device is built based on fused deposition modeling process. With studying on mechanical systems, control systems and software systems in forming system of multi-material parts, the thesis mainly focus on the study of control system of the multi-material molding systems, completing design and development work, of control system in forming system of multi-material parts based on the FDM process.Based on the forming device, a lot of data of multi-material parts forming are tested, at the same time, we use orthogonal experimental to analysis the influence factors and their mutual combination of multi-material parts molded to the combined effects of the quality in forming process, on this basis, we optimize the process parameters of the multi-material parts forming. Based on the optimization of the process parameters, we build some multi-material parts. The experimental results show that the indicators and performance of system reaches a preliminary design goal. The forming system platform of multi-material parts in this paper lays the foundation for the design and rapid manufacture of integrated multi-material model.