The influence of temperature on parts in CNC machining



1. In actual machining, due to the influence of various heat sources such as impact heat, cutting heat, working temperature, radiant heat, etc., the temperature changes of CNC lathes, tools, and processed workpieces will cause thermal expansion, affecting the relative displacement between the workpiece and the tool, resulting in machining errors, and affecting the machining precision of CNC parts. The thermal expansion coefficient of construction steel is 0.000012/℃. Construction steel with a size of 100mm expands by 1.2μm when the temperature rises by 1℃. In addition to the direct relationship between temperature changes and workpiece expansion, it also affects the CNC machining precision of machinery.

2. In CNC machining CNC communication equipment processing, higher requirements are placed on the precision and accuracy of workpiece machining CNC machining. According to statistical analysis of material evidence, in CNC precision machining, due to thermal expansion, machining errors account for 40%-70% of the total machining deviation. Therefore, in high-precision CNC machining, in order to prevent the workpiece from expanding due to temperature changes, the standard ambient temperature in the generally harsh regulatory environment has established an error limit for temperature changes, and temperature control processing at 20℃±0.1℃ and 20±0.01℃ still occurs.