Research On Processing Parameter Optimization Of High-speed Milling Ultra-high Strength Steel 30Cr3SiNiMoVA

Ultra-high strength steel has been widely used in aerospace and aviation industry dueto its excellent performance. However, its high strength, high hardness, low thermalconductivity characteristics have making it a difficult machining material. Traditionalprocessing of ultra-high strength steel generally adopted the combination of rough cuttingand finishing grinding, so that the entire process has too many process steps, and istime-consuming and low efficiency. Ultra-high strength steel is often employed inmanufacturing thin-wall and precise components in order to meet the requirements ofreducing the weight and maintaining the strength. However, grinding process is inability tomeet the need of processing quality and efficiency simultaneously. Therefore,contradiction between the needs of low productivity and processing quality and thegrowing demand for processing has been the main bottlenecks of its application promotionin the aerospace manufacturing industry.With the development of high-speed machine tools and tool technology, high-speedcutting technology has entered the field of difficult machining materials. High-speedcutting can not only greatly improve the processing efficiency, but also obtain excellentprocessing quality. Therefore, using high-speed cutting, especially high-speed milling,instead of the original grinding to achieve the finishing of ultra-high strength steel andother difficult machining materials has become a research hotspot in recent years. However,as a new manufacturing mode, researchers have not formed systematic understanding ofthe mechanism of high-speed machining and need further study; at the same time, researchon the high-speed milling of ultra-high strength steel is little, and the reference for theselection of process parameters is not enough, all of these will restrict the optimization ofmanufacture process in actual production of ultra-high strength steel. This paper based onthe processing characteristics of rudder part, adopted finite element simulation and cuttingtests to study the high-speed milling performance of super high strength steel 30Cr3SiNiMoVA combined with the actual processing situation, and finally provideguidance and advice for the local unit's production.This article mainly aims at the research on the high speed milling performance of30Cr3SiNiMoVA in order to search for the processing parameters suitable for theultra-high strength steel, the following works has been done during this research.(1) Research of the cutting mechanism of high precision milling of low alloy ultrahigh strength steel 30Cr3SiNiMoVA based on the finite element simulation technology.(2) Study of the milling force, milling vibration, dynamic performance index and thesurface roughness of high precision milling of low alloy ultra-high strength steel30Cr3SiNiMoVA based on the machining experiments. Seek the reasonable cuttingparameters to achieve the best effect of cutting.(3) Study of the processing optimization includes processing optimization(comparison of surface milling and side milling), the optimization of cutting parameters,fixture optimization etc. of high precision milling of low alloy ultra-high strength steel30Cr3SiNiMoVA based on the cutting experiments and finite element simulationtechnology.