machinery industry promoters, social progress and development, through scientific design and manufacture, has made great achievements nowadays. Large equipment is made up of many parts. If there are unqualified, it needs to be processed to make it more precise and improve performance.

    processing services in the machinery industry demand is very large, large castings, precision parts, drawing machinery, gray iron nodular iron processing and so on. Precision measurement technology is the foundation and prerequisite for industrial development, which has been confirmed by the history of production and development. From the history of the development of production, the improvement of machining accuracy is always closely related to the development level of measurement technology. For science and technology, measurement and control are the driving factors for its development. The accuracy and efficiency of measurement determine the level of science and technology to a certain extent.

    with the development of science and technology and the development of manufacturing industry, the measurement of micro size is becoming more and more urgent. From the mechanical industry, the electronic industry to bioengineering, and environmental protection, and from the thermonuclear reaction of the sophisticated science to the chemical fibers in daily life, there are small dimensions of measurement. Such as: the millimeter size bearing of the guidance system; small holes, filaments, small spheres in the machining; the thickness of the coating in optical processing; the &mdash of the magnetic head in the computer; the — the tiny gap between the disks and so on. The measuring range is small, the resolution and accuracy are high, the degree of automation is high, and the difficulty is very great. In the face of such a problem, some new measurement principles and methods are urgently needed. precision parts processing market demand is very large, need processing service manufacturers common progress to solve.