【正文】 th oil lubrication methods. In the field of highspeed machining. have air bearings and the development of 第 33 頁(yè) 共 44 頁(yè)magic bearings and magic bearings and air bearings bined constitute the magic gas / air mixing spindle.Feed the machine sector, highspeed machining used in the feed drive is usually larger lead, multiple highspeed ball screw and ball array of smalldiameter silicon nitride (Si3N4) ceramic ball, to reduce its centrifugal and gyroscopic torque。 By using hollowcooling technology to reduce operating at high speed ball screw as temperature generated by the friction between the lead screw and thermal deformation.In recent years, the use of linear motordriven highspeed system of up to39。39。 Such feed system has removed the motor from workstations to Slide in the middle of all mechanical transmission links, Implementation of Machine Tool Feed System of zero transmission. Because no linear motor rotating ponents, from the role of centrifugal force, can greatly increase the feed rate. Linear Motor Another major advantage of the trip is unrestricted. The linear motor is a very time for a continuous machine shop in possession of the bed. Resurfacing of the very meeting where a very early stage movement can go, but the whole system of up to the stiffness without any influence. By using highspeed screw, or linear motor can greatly enhance machine system of up to the rapid response. The maximum acceleration linear motors up to 210G (G for the acceleration of gravity), the largest feed rate of up to 60 200m/min or higher. 2022 worldrenowned Shanghai Pudong maglev train project of maglev track steel processing, Using the Shenyang Machine Tool Group Holdings Limited McNair friendship pany production plants into extralong highspeed system for largescale processing centers achieve . The machine feeding system for the linear guide and rack gear drive, the largest table feed rate of 60 m / min, Quick trip of 100 m / min, 2 g acceleration, maximum speed spindle 20220 r / min, the main motor power 80 kW. Xaxis distance of up to 30 m, 25 m cutting long maglev track steel error is less than mm. Maglev trains for the smooth pletion of the project provided a strong guarantee for technologyIn addition, the campaign machine performance will also directly affect the processing efficiency and accuracy of processing. Mold and the free surface of highspeed machining, the main wiring with small cut deep into methods for processing. Machine requirements in the feed rate conditions, should have highprecision positioning functions and highprecision interpolation function, 第 34 頁(yè) 共 44 頁(yè)especially highprecision arc interpolation. Arc processing is to adopt legislation or thread milling cutter mold or machining parts, the essential processing methods.Cutting Tools Tool Material development highspeed cutting and technological development of the history, tool material is continuous progress of history. The representation of highspeed cutting tool material is cubic boron nitride (CBN). Face Milling Cutter use of CBN, its cutting speed can be as high as 5000 m / min, mainly for the gray cast iron machining. Polycrystalline diamond (PCD) has been described as a tool of the 21st century tool, It is particularly applicable to the cutting aluminum alloy containing silica material, which is light weight metal materials, high strength, widely used in the automobile, motorcycle engine, electronic devices shell, the base, and so on. At present, the use of polycrystalline diamond cutter Face Milling alloy, 5000m/min the cutting speed has reached a practical level. In addition ceramic tool also applies to gray iron of highspeed machining。 Tool Coating : CBN and diamond cutter, despite good highspeed performance, but the cost is relatively high. Using the coating technology to make cutting tool is the low price, with excellent mechanical properties, which can effectively reduce the cost. Now highspeed processing of milling cutter, with most of the wiring between the TiA1N posite technology for the way of multiprocessing, If present in the nonferrous metal or alloy material dry cutting, DLC (Diamond Like Carbon) coating on the cutter was of great concern. It is expected that the market outlook is very significant。 Tool clamping system : Tool clamping system to support highspeed cutting is an important technology, Currently the most widely used is a twofaced tool clamping system. Has been formally invested as a modity market at the same clamping tool system are : HSK, KM, Bigplus. NC5, AHO systems. In the highspeed machining, tool and fixture rotary performance of the balance not only affects the precision machining and tool life. it will also affect the life of machine tools. So, the choice of tool system, it should be a balanced selection of good products. Process Parameters Cutting speed of highspeed processing of conventional shear velocity of about 10 times. For every tooth cutter feed rate remained basically unchanged, to 第 35 頁(yè) 共 44 頁(yè)guarantee parts machining precision, surface quality and durability of the tool, Feed volume will also be a corresponding increase about 10 times, reaching 60 m / min, Some even as high as 120 m / min. Therefore, highspeed machining is usually preclude the use of highspeed, feed and depth of cut small cutting parameters. Due to the highspeed machining cutting cushion tend to be small, the formation of very thin chip light, Cutting put the heat away quickly。 If the wiring using a new thermal stability better tool materials and coatings, Using the dry cutting process for highspeed machining is the ideal technology program.Highspeed machining field of applicationFlexible efficient production lineTo adapt to the needs of new models, auto body panel molds and resinprevention block the forming di