機械加工專業(yè)畢業(yè)設(shè)計外文資料翻譯--高速切削加工的發(fā)展及需求-其他專業(yè)(文件)
【正文】 icon nitride (Si3N4) ceramic ball, to reduce its centrifugal and gyroscopic torque。 machine tool spindle speed high, generally spindle speed in 20210r/min above 10,000 for highspeed cutting。s application fields and the demand situation. Highspeed machining is oriented to the 21st century a new hightech, highefficiency, Highprecision and high surface quality as a basic feature, in the automobile industry, aerospace, Die Manufacturing and instrumentation industries gained increasingly widespread application, and has made significant technical and economic benefits. contemporary advanced manufacturing technology an important ponent part. HSC is to achieve high efficiency of the core technology manufacturers, intensive processes and equipment packaged so that it has a high production efficiency. It can be said that the highspeed machining is an increase in the quantity of equipment significantly improve processing efficiency essential to the technology. Highspeed machining is the major advantages : improve production efficiency, improve accuracy and reduce the processing of cutting resistance. The highspeed machining of meaning, at present there is no uniform understanding, there are generally several points as follows : high cutting speed. usually faster than that of their normal cutting 5 10 times。 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. 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 stiff
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