Experimental Research And Cutting Property Analysis On Turn-Chasing Cutting Nickel-based Alloy GH4169

Nickel based superalloy at high temperature has high hardness and high strength, resistance to oxidation and corrosion of the gas,which determines it can work in high temperature oxidation atmosphere and gas conditions, so it is widely used in aerospace field, especially the gas turbine aero engine, all kinds of hot end components etc. However, nickel based high temperature alloy in the cutting process has large cutting force, high cutting temperature, serious tool wear and poor quality of machined surface,which lead it appear a lot of difficult machining problems, which become the leading cause of nickel based high temperature alloy low productivity.Turn-chasing cutting compound cutting technology developed in recent ten years, the cutting point is based on the single tooth, cutting force and temperature rise of small, high processing efficiency and workpiece surface quality is good, the cutting process has been widely used in automobile engine crankshaft. Because of the characteristic of the cutting point dispersion, the vehicle is able to be an effective way to solve the problems such as high cutting temperature and serious tool wear in high temperature alloy processing. Therefore, in this paper, nickel based superalloy GH4169 as the research object, in-depth study of the performance of its car comb cutting.The mechanical properties and cutting characteristics of high temperature alloy GH4169 are analyzed from the microscopic point of view, and the advantages and feasibility of the Ni based high temperature alloy GH4169 are discussed in this paper.Secondly, the use of cutting process of car combing simulation finite element simulation software Deform-3D, and according to the cutter tip geometry parameters were optimized GH4169 features of cutting and finishing range that the rake angle yo=20° and tip angle ?=55° after angle ?o=0°, Chip angle ?=97°, knife rod angle 10°.Thirdly, using the orthogonal test to study the influence of knife type optimized comb blade cutting process of high temperature alloy cutting depth, feed rate and cutting speed on cutting force and surface roughness of workpiece, reveals the various cutting factors on cutting force and surface roughness of workpiece degrees through the range analysis method, establish the comb cutting force and surface roughness mathematical model, the cutting force and surface roughness of workpiece optimal cutting parameters corresponding to the best degree. In the same cutting parameters, cutting performance comparison of comb type blade and D type blade machining high temperature alloy GH4169:cutting cutter is reduced by 43%, the surface roughness decreased by 6%, and in the cutting tool wear and chip breaking is better than that of D type blade.Turn-chasing cutting High temperature alloy GH4169 process scheme can effectively improve tool stress, reduce the cutting tool wear rate, improve the cutting efficiency, and has wide application value in the field of machining high temperature alloy aerospace.