China needs to vigorously the development of ultra precision CNC machine tools

　　"Ultra precision machine tool is a leading technology research and development and manufacturing technology, will lead the processing precision of machine tool towards human not involve technology deepen constantly." Beijing machine tool research institute Liu Bingye at the recent 2014 high-end development of Chinese machine tool on the BBS, points out that "ultra precision machine tool is developed country attaches great importance to and take measures to control the machine tool, and it embodies the precision technology competitiveness of a country."

　　

　　Liu Bingye stressed that in the past 30 years, the world of machine tool technology have been greatly developed, the development trend of machine tool technology also presents the diversified characteristics, but high precision is one of the main development trend in nc machine tools, precision and ultra precision machining is an order of magnitude higher than precision machining accuracy.

　　

　　In fact, the ultra precision machining technology involved in the field are abundant. During the course of Beijing machine tool research institute more than 30 years of research, research in ultra precision machining technology and related technologies related to Liu Bingye systematically summed up the 36 key frontier research and 11 leading core technology. The research includes design, key, the moving parts, measurement analysis, process technology, manufacturing technology and main machine tool technology conditions of six aspects. Leading core technologies include: precision ultra-precision spindle structure of key technology of manufacturing, precision key structure super precision linear motion components manufacturing technologies, high resolution motion drive technology, machine tool processing manufacturing technology of key parts and components to resist external interference characteristics of the technology, high stability, fast linear motion of the structure and manufacturing technology, exercise more axis machine tool of nested structure design technology, as well as the target parts manufacturing machine integrated manufacturing technology, etc.

　　

　　"In the accuracy of machine tools from developing course of micron scale to the nanoscale, there are three key technologies, is unable to avoid these three techniques is the threshold of nano precision machine tool research." Liu Bingye analysis, according to one of them is without delay bearing technology, hysteresis abounds in mechanical system, the hysteresis phenomenon not only seriously affect the positioning accuracy of machine tool slide carriage movement and repeated positioning precision, also affect the movement of high resolution, but also affect the precision parts processing precision and shape of the surface roughness. And hydrostatic bearing technology is a good way to solve the mechanical hysteresis phenomenon, and can homogenize the geometric error, get a lot of application in ultra precision machine tools. Static pressure technology in significant progress has been made in the past ten years, since the feedback compensation technology is more mature. With flow control throttle technology improved greatly with the stiffness of hydrostatic bearing, the material hardness of the ultra precision machine tool processing enhances unceasingly.

　　

　　And the other two key technologies are high resolution drive technology and micro vibration processing technology of mechanical systems. Nanoscale resolution is characteristic of ultra precision machine tool performance in last decade, many factors that affect the movement. At the same time, a large number of experimental studies found that ten nanometer level exists in many mechanical actuator, the vibration signal for the execution and determination of the mechanical sensitivity caused by disturbance, this kind of vibration is called the micro vibration. "The research on the mechanism of vibration, and to seek solutions is the ultra-precision machine tool path to the nanometer accuracy." Liu Bingye said.