XIA Wei, ZHANG Li chao, XIONG Hai yang

 

(State Key Laboratory of Material Processing and Die ＆ Mould Technology, 

 

Huazhong University of Science and Technology, Wuhan 430074, China)

 

 

Abstract: Aiming at the problem that inherent balling behavior and stepped effect of selective laser melting and the 3D printed parts had large gaps from the high end applications on the surface accuracy and roughness, a creative metal hybrid 3D Printer control system was designed and developed. The process of merging selective laser melting and conventional machining was implemented as a result , namely adding new manufacturing processes of milling or grinding into superimposed forming process laser scanning layer by layer. In the control system based on Siemens Simotion as the control center, UDP and IPC was used in software communication via Ethernet bus, the function of laser galvanometer was controlled via PCI bus, biaxial servo motor drive and external encoder module were connected via DRIVE CLiQ bus, I/O modules were expanded remotely to control the inverter and other I/O ports via Profibus DP bus. The results indicate that the system has high degree of freedom and scalability while developing and testing, all the axes don′t interference mutually while running asynchronously, and the main axis has high precision of interpolation.

 

Key words: selective laser melting(SLM); metal hybrid 3D printer; Siemens simotion