First,precision parts cutting

There are mainly precision turning,mirror grinding and grinding.It is micro-turned on a precision lathe with a single-crystal diamond turning tool that is finely ground.The cutting thickness is only about 1 micrometer.It is often used for processing high-precision,high-profile and smooth parts such as spherical,aspherical and flat mirrors of non-ferrous materials..For example,an aspherical mirror with a diameter of 800 mm for processing a nuclear fusion device has a maximum precision of 0.1μm and an appearance roughness of Rz 0.05μm.

Second,precision parts processing

When the precision of machining precision parts is nanometer,or even the last atomic unit(atomic lattice distance is 0.1-0.2 nm),the machining method of ultra-precision parts can not be adapted.It is necessary to use the method of special precision parts processing,that is,the application of chemical energy.Electrochemical energy,thermal energy or electrical energy,such that the energy exceeds the joint energy between the atoms,thereby removing the adhesion,joint or lattice deformation between some of the atoms on the surface of the workpiece to achieve ultra-precision processing.Among these processes are mechanochemical polishing,ion sputtering and ion implantation,electron beam exposure,laser beam processing,metal evaporation,and molecular beam epitaxy.