Figure Coordinate measuring machine Coordinate Measuring Machining (CMM) is a new type of highly efficient precision measuring instrument developed in the 1960s. Its emergence, on the one hand, due to the high-efficiency machining of automatic machine tools, CNC machine tools and the processing of more and more complex shape parts, it needs to be equipped with fast and reliable measuring equipment; on the other hand, it is due to electronic technology, computer technology, digital control technology. And the development of precision machining technology provides a technical basis for the production of CMM. In 1960, the British FERRANTI company successfully developed the world's first coordinate measuring machine. By the end of the 1960s, more than 30 companies in nearly ten countries were producing CMM, but the CMM in this period is still in its infancy. stage. After entering the 1980s, many companies represented by ZEISS, LEITZ, DEA, LK, Mitutoyo, SIP, FERRANTI, MOORE, etc. have continuously introduced new products, which has accelerated the development of CMM. Modern CMM can not only complete various complex measurements under computer control, but also can exchange information with CNC machine tools to realize the control of processing, and can also realize reverse engineering based on measurement data. At present, CMM has been widely used in various sectors such as machinery manufacturing, automobile industry, electronics industry, aerospace industry and national defense industry, and has become an indispensable universal measuring equipment for modern industrial inspection and quality control. The development stage of the coordinate measuring machine: (1) Digital display and print type (2) With computer for data processing (3) Computer digital control type
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This kind of CMM is mainly used for geometric dimension measurement. It can display and print the coordinate data of the measured points. However, in order to obtain the required geometric shape and shape error, manual calculation is needed. The technical level is low, and it has been basically Tao. Eliminate.
This type of CMM technology is slightly higher and is currently used more. The measurement is still manual or maneuverable, but the computer can process the measurement data, and can complete the data processing such as automatic correction of the workpiece installation tilt, calculation, coordinate transformation, hole center distance calculation, and deviation value calculation.
This type of CMM technology has a high level and can be automatically measured according to a programmed program like a CNC machine.