【正文】 ne , demand for the information integration of the manufacturing pany workedly greatly of numerical control equipment, it is a basic unit of realizing the new manufacture mode too. Classification of the machining center （ 1） Process according to main shaft space position when it classifies to be as follows, horizontal and vertical machining center. Horizontal machining center, refer to the machining center that the axis level of the main shaft is set up . Horizontal machining center for 35 sport coordinate axis, a mon one three rectilinear motion coordinate axis and one turn the coordinate axis of sports round (turn the workingbench round), it can one is it is it finish other 4 Taxi processing besides installing surfaces and top surfaces to insert to install in work piece, most suitable for processing the case body work piece . Compared with strength type machining center it, the structure is plicated, the floor space is large, quality is large, the price is high. Vertical machining center, the axis of the main shaft of the vertical machining center, in order to set up vertically, its structure is mostly the regular post type, the workingbench is suitable for processing parts for the slippery one of cross, have 3 rectilinear motion coordinate axis generally , can find a room for one horizontal numerical control revolving stage (the 4th axle ) of axle process the spiral part at workingbench. The vertical machining center is of simple structure, the floor space is small, the price is low, after allocating various kinds of enclosures , can carry on the processing of most work pieces . Largescale gantry machining center, the main shafts are mostly set up vertically, is especially used in the largescale or with plicated form work piece , is it spend the many coordinate gantry machining center to need like aviation , aerospace industry , some processing of part of largescale steam turbine. Five machining centers, this kind of machining center has function of the vertical and horizontal machining center, one is it after inserting , can finish all five Taxi processing besides installing the surface to install in work piece, the processing way can make form of work piece error lowest , save 2 times install and insert working, thus improve production efficiency , reduce the process cost. (2)Classify by craft use Is it mill machining center to bore, is it mill for vertical door frame machining center , horizontal door frame mill the machining center and Longmen door frame mill the machining center to divide into. Processing technology its rely mainly on the fact that the door frame is milled, used in case body, shell and various kinds of plicated part special curve and large processes , curved surface of outline process, suitable for many varieties to produce in batches small. Complex machining center, point five times and pound and process mainly, the main shaft head can be turned round automatically, stand, lie and process, after the main shaft is turned round automatically, realize knowing that varies in the horizontal and vertical direction. (3)Classify by special function Single workingbench , a pair of workingbench machining center。 Transfer vertically to the tower machining center and transfer 。 One hundred sheets of storehouses connects and writes hands to add the main shaft and change one hundred sheets of machining centers。t by artificial to participate in most, get from CAPP database in system directly. （ 5） . The dependability of the dependability maximization numerical control lathe has been the major indicator that users cared about most all the time . The numerical control system will adopt the circuit chip of higher integrated level , will utilize the extensive or super largescale specialpurpose and posite integrated circuit, in order to reduce the quantity of the ponents and parts , to improve dependability . Throu