【導(dǎo)讀】附1外文資料及翻譯.....

　　

【正文】 at high velocity, usually 15 50m/min up to 90m/min。 For different cutting materials and the wiring used the tool material, highspeed cutting the meaning is not necessarily the same。 Cutting process, bladed through frequency (Tooth Passing Frequency) closer to the machinetool Workpiece system the dominant natural frequency (Dominant Natural Frequency), can be considered to be highspeed cutting. Visibility highspeed machining is a prehensive concept. 第 32 頁(yè) 共 44 頁(yè) 1992. Germany, the Darmstadt University of Technology, Professor H. Schulz in the 52th on the increase of highspeed cutting for the concept and the scope, as shown in Figure 1. Think different cutting targets, shown in the figure of the transition area (Transition), to be what is monly called the highspeed cutting, This is also the time of metal cutting process related to the technical staff are looking forward to, or is expected to achieve the cutting speed. Highspeed machining of machine tools, knives and cutting process, and other aspects specific requirements. Several were from the following aspects : highspeed machining technology development status and trends. At this stage, in order to achieve highspeed machining, general wiring with high flexibility of highspeed CNC machine tools, machining centers, By using a dedicated highspeed milling, drilling. These equipment in mon is : We must also have highspeed and highspeed spindle system feeding system, Cutting can be achieved in highspeed process. Highspeed cutting with the traditional cutting the biggest difference is that Machinetoolworkpiece the dynamic characteristics of cutting performance is stronger influence. In the system, the machine spindle stiffness, grip or form, a long knife set, spindle Broach, torque tool set, Performance highspeed impact are important factors. In the highspeed cutting, material removal rate (Metal Removal Rate, MRR), unit time that the material was removed volume, usually based on the machinetoolworkpiece whether Processing System chatter. Therefore, in order to satisfy the highspeed machining needs, we must first improve the static and dynamic stiffness of machine spindle is particularly the stiffness characteristics. HSC reason at this stage to be successful, a very crucial factor is the dynamic characteristics of the master and processing capability. In order to better describe the machine spindle stiffness characteristics of the project presented new dimensionless parameter DN value, used for the evaluation of the machine tool spindle structure on the highspeed machining of adaptability. DN value of the socalled axis diameter per minute speed with the product. The newly developed spindle machining center DN values have been great over one million. To reduce the weight bearing, but also with an array of steel products than to the much more light ceramic ball bearings。 Bearing Lubrication most impressive manner mixed with 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. 20xx 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 20xx0 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 technology In 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 第 34 頁(yè) 共 44 頁(yè) highprecision positioning functions and highprecision interpolation function, 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 technol