Research And Prediction Of Process On NC Milling For 1Cr18Ni9Ti

Stainless steel has the advantages such as high strength, corrosion resistance, high temperature and other characteristics. It's more and more widely used in aviation, aerospace, shipbuilding, chemical and construction industries. However, alloying elements that it contains makes it hard or even difficult to cut, leading to low production efficiency. Especially in NC milling of stainless steel materials, phenomena commonly exists in domestic machinery processing industry, on serious tool wear, chipping, breaking and other prevalence, resulting in low processing efficiency, high cost and long processing time, and the product price is not easy to estimate precisely.Aiming at NC milling for 1Cr18Ni9Ti parts, performance analysis is done on milling of austenitic stainless steel.3D model of the cutter is established, and finite element analysis is accomplished. Proposals are presented for the improvement on the milling process, and milling physical model is then built. Furthermore, based on UG NX software, and focused on NC milling of stainless steel processing, a prediction system was developed. The system can predict on cutting force, cutter strength, and surface roughness. It can provide valuable scientific reference of optimization of cutting parameters for technical insiders. The model has advantages in practical use, and it provides predictions with high reliability. The research in this paper is focused on the following several aspects:Based on the analysis of stainless steel milling characteristics, solutions are proposed on improvements of milling methods and tools. Via deeply study on cutting force and cutting parameters, and considering with actual mechanical processing conditions, the milling force model is established for stainless steel.3D models for vertical milling cutters are established based on UG NX software. By aid of finite element analysis module, the stress and displacement scheme are obtained for vertical milling cutter on the cutting process. Analysis is accomplished on regular pattern of cutter breakage, which provides scientific reference on optimization of cutting parameters, as well as improvement measures on technology of CNC milling process.Based UG NX software, the prediction system in 1Cr18Ni9Ti stainless steel milling process is developed for prediction and optimization of cutting parameters such as cutting force and surface roughness.In practical application, it is verified that the prediction model established in the paper for NC milling of 1Cr18Ni9Ti stainless steel can successfully predict cutting force, cutter strength and surface roughness. It can significantly improve processing efficiency, reduce processing costs and shorten production cycle.