Precision machining technology is an advanced manufacturing technology developed to meet the needs of modern high technology and is the basis for other high-tech implementation. It comprehensively applies new technologies such as modern electronics, sensing technology, optical and computer technology and high-tech development. It is the basic technology in the high-tech field and plays a vital role in the modernization of national defense technology and national economic construction. At the same time, as a basic technology and an important part of high technology, it promotes the cross-development and development of many technologies such as semiconductor technology, optoelectronic technology and materials science. Machining methods with a machining accuracy of 1 micron, precision machining is performed using precision machine tools and precision instruments and meters under strictly controlled environmental conditions.
Processing accuracy of up to and beyond 0.1 microns, called ultra-precision machining. In the aerospace industry, precision machining is primarily used to machine precision mechanical parts in aircraft control equipment, such as precision parts in hydraulic and pneumatic servo systems, gyroscope frames, housings, air floats, liquid bearing assemblies and floats. The precision parts of the aircraft are complex in structure, low in rigidity, high in precision, and large in proportion of difficult materials. The effects of the precision machining process are as follows: 1. The geometry and mutual positional accuracy of the parts reach micrometers or angular seconds; 2. The limit or characteristic dimension tolerance of the parts is less than micrometers; 3. The microscopic unevenness of the surface of the parts (surface irregularities) The average height difference is less than 0.1 micron; 4, the complementary parts can meet the requirements of the mating force; 5, the parts can also meet the requirements of precision machinery or other physical characteristics, such as the torsional stiffness of the torsion bar of the floating gyroscope and the stiffness of the flexible part coefficient.
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