【正文】 s, automatic line in order to achieve such a short period of the beat, often side by side duplex to be used or set up two ways, namely, the decision of the automatic line rhythms, processes the longest processing time through parallel processing of two identical workers spaces, if more restrictive process, then the same through the use of two automatic lines to balance the processing line system automatically beat. It is clear that this is necessary to increase investment in equipment and operating area. Automatic beat short lines, mainly by shortening the time and support the basic time to achieve. There are two virtues that are low cost and high efficiency in modular machine tools, which is widely used in batch production. This text introduces an automatic control system of multistation modular machine tool. Applying PLC to control the modular machine tool can raise the automation extent and work efficiency and reduce a great deal of hardware wiring,so the dependability of the machine tool is also increased. 。 2） . Modular. NC plus one two modular greatly enrich the position of the Universal machine parts, it will cause universal machine bination of a fundamental change，According to modularization design theory, the modules of aggregate machine tool are divided in this paper on the basis of function analysis. Taking UG software as developing flat, the parametric 3D modeling module bank is set up. The database for storing the data used in design is also set up at the same time. Under the guiding of the system, users can plete such tasks as module choice, module bination, and calculation, ,puter aided modularization design of aggregate machine tool can be realize.. 3） . Highspeed. As highspeed processing can greatly reduce the surface roughness and 9 cutting force ponents, greatly reducing cutting temperature, increase productivity, the machine s highspeed research is rising, especially NC machine tool movements and the main feed velocity has reached an alarming highspeed . For example, the . production of processing center, spindle speed up to 15 00060 000r/min, table fast forward speed of up to 90120 m / min. Conform to the trend of highspeed machines, machine tools bination of speed getting higher and higher. For example, the German Volkswagen plant in the processing of aluminum cylinder head bustion chamber side, the use of PCD cutter and milling speed of up to 3 075m/min, feed rate of 3 600mm/min, the CBN has adopted the installation of the new boring knife blade processing Kevin Gray Rail, the cutting speed of 800 m / min, feed rate of I 500 mm / min. 4, precision of. As the realization of NC machine tools, thus increasing the accuracy of processing machine, so that some of the past seem difficult to achieve the accuracy of processing has been realized . Protection of the whole. Completely closed the machine is now a major characteristic, whether single or machine tool production lines, are all closed by the housings, electrical, hydraulic full use of air alignment. All closed protection, not only production line machine tools and their aesthetic appearance, but also improve the safety, reliability and ease of maintenance. Machine tools and automatic bination of technical development trend line Combination of automated machine tools and machine tool portfolio is a dedicated highperformance line of automation technology and equipment, at present, it is still a large number of mechanical products for efficient, highquality and economic production of key equipment, have been widely used in automobiles, tractors, internal bustion engines and pression machines and many other areas of industrial production. Which, in particular the auto