Precision machining technology
Ultra-precision cutting, such as diamond cutting tools for ultra-precision cutting, can process a variety of mirrors. It has successfully solved the processing of large parabolic mirrors used in laser fusion systems and celestial telescopes;
Ultra-precision grinding and grinding processes such as high-density hard disk coating surface processing and large-scale integrated circuit substrate processing;
Ultra-precision special processing: such as the graphics on large-scale integrated circuit chips, is processed by electron beam and ion beam etching. Such as scanning tunneling electron microscope (STM) processing, line width up to 2 ~ 5nm.
(1) High precision. Including high static and dynamic accuracy, the main performance indicators are geometric accuracy, positioning accuracy and repeated positioning accuracy, resolution, such as spindle rotation accuracy, rail movement accuracy, indexing accuracy, etc.;
(2) High stiffness. Including high static stiffness and dynamic stiffness. In addition to its own stiffness, it should also pay attention to the contact stiffness, and the stiffness of the process system composed of the workpiece, machine tools, tools, and fixtures.
(3) Highly automated. In order to ensure the quality of processing and reduce the influence of human factors, the processing equipment is often automated using a numerical control system.
In the aviation industry, there are a lot of demand for precision and ultra-precision machining in the manufacture of artificial satellites, space shuttles, and civilian passenger aircraft. For example, attitude bearings and telemetry components for satellites have a great influence on the observation performance. The bearing is a vacuum non-lubricated bearing, and the surface roughness of its hole and shaft is required to be Ry0.01μm, ie 1nm, and its roundness and cylindricity require nanometer precision.
