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The article introduces the new technologies and methods in chassis of IPC design. It elaborates the process from following four parts: electromagnetic shielding, anti-libration and anti-impact design, thermal design and other protective design. The last part summarizes the design procedure and looks ahead to the future of this field.

A new method of the abrasive tool topography simulation for surface-contact grinding is advanced based on the description of exposed grain feature and the stochastic allocation characteristic of abrasive grains emerges in grinding process. In this paper, particularities of surface-contact grinding and simulation method suitable for the particularities are discussed. The physical behaviors of abrasive tool topography are analyzed with respect to the effect of grain status, grain location and influence of dressing. The simulation model is proposed as synthesis of simulation for the grain size, grain location and influence of dressing. It has been shown from the simulation experiment that this feature description and probability statistics theory based topography model can describe the particularities very well and is proved feasible for simulation of surface-contact grinding.

In modem manufacturing,the various and complex requirement of industry makes the CNC machine tools more and more automatic and networking.While a remote monitoring and intelligent fault diagnosis system is the basic and indispensable unit for automatic and networking machine tools.This paper is focused on open CNC system,the condition monitoring, and fault diagnosis technology are researched of open CNC system. Integration achieved the CNCmachine tools' status remote monitoring and intelligent fault diagnosis, and detailed analysis of the key technologies for the components of the system. Through effectively integration of the computer technology, Fault Tree Analysis method, or other technologies to enhance the automation, networking and intelligent level of the open CNC system. Keywords: open CNC system; remote monitoring; intelligent fault diagnosis ;Fault Tree Analysis Method;