Influence of temperature on process of precision machine parts machining

Your environment is very critical, it can also fully play a very large effect. In daily life, it is often applied to high-precision mechanical parts, so it is very familiar with. In the process of concrete machinery processing production in various pyrogen (friction drilling hot, hot, natural environment temperature, radiation, etc.), under the effect of CNC lathe, CNC blade, such as processed workpiece temperature changes will occur thermal deformation, could harm the workpiece with CNC blade, the relative displacement between processing deviation, thereby endangering parts machining accuracy. If the thermal expansion coefficient of the material is 0.000012/℃, for the length of 100mm cast iron, when the temperature rises 1℃ will extend 1.2 μm. Temperature transformation can directly harm the workpiece telescopic, mechanical equipment accuracy is also harmful.

In the process of precision machinery and equipment, the accuracy and reliability of the workpiece are clearly put forward better provisions. According to the statistical analysis of relevant materials, in high precision machining, the processing deviation caused by thermal deformation accounts for 40%-70% of the total processing deviation. Therefore, in high precision and high precision machining, in order to better prevent the workpiece due to temperature change caused by expansion and contraction, generally strict requirements of the standard temperature of the natural environment. And established the error range of temperature transition, 20℃±0.1℃ and 20±0.01℃ temperature control processing has already occurred. General situation, for high precision machining with constant temperature and humidity laboratory equipment, in order to prevent the processed workpiece when machining and metrological verification easy temperature shift swell-shrink, general requirements the standard temperature inside the room, and established the error categories of temperature change, and the demand for gas humidity of the air, there is no strict textiles testing precision of the regulations. For example, in a national ultra-high precision machining laboratory, the specified temperature is 20℃±0.2℃, and the air humidity is 45%±5%. In the future, with the development trend of The Times, the development of technology, high precision parts processing temperature manipulation processing technology, will be more and more developed!