The Research To Germanium Single-Crystal Cutting Process Based On The Molecular Dynamics

With the progress of science and technology, advanced technology also gets the progress of the leap. The ultra precision machining is a kind of typical representative technology of advanced technology, in recent years the ultra-precision chip processing has made a qualitative leap, now it is considered as a leading important symbol of the measure of a national science and technology. In the cutting process, When the cutting scale is nanometer scale, it is prone to the phenomenon of the size effect and surface effect due to the small size. The cutting mechanism of materials demonstrated in the micro world is different from the traditional processing methods, so the traditional processing method is not suitable for ultra precision machining. It is necessary to take into account the mechanical properties, nanometric cutting mechanism of material in nanometer scale.Currently, the ultra-precision machining technology covers a wide range and has been applied to many fields, such as optical precision components, high-precision instruments of aerospace and medical instruments. The article mainly focuses on the optical crystal element-irregular hexagonal drum, and the material is single crystal germanium which belongs to a hard and brittle material. This kind of material has the properties of brittleness,easy cleavage. It is extremely easy to produce cracks and edge collapse phenomenon and other defects when using traditional processing. It is difficult to achieve the desired surface quality. The traditional method of processing is difficult to control the temperature, humidity, and the tool angle of the geometry. However, molecular dynamics can be effectively control some of the factors which affects the machining accuracy, thereby obtaining the ideal machining surface quality.