High Temperature Alloy GH4169 HSM Theoretical And Experimental Research

The high-temperature alloy GH4169 nickel-based is a typically difficult-to-machine material, it is widely applicable to aerospace industry. Because of its small thermal conductivity, big friction coefficient and contact area of the chip and a small rake face and other reasons, so make existing in the high-speed machining cutting force big, high temperature, cutting tool wear serious and other factors ,affecting the high-temperature alloy processing efficiency. In this paper, nickel-based alloy GH4169 as the research object, doing theoretical and experimental research of high-speed milling cutting force, surface roughness, shear angle and friction angle and milling temperature.On high-speed machining techniques are outlined, the advantages of high speed cutting its unique cutting process will become the mainstream, the other in difficult materials with the widespread use of industrial production, its high-speed machining technology research is hot topic.By simplifying the cutting process model, a two-dimensional cutting force model is built ,based on this three-dimensional cutting force model for oblique cutting also be built; High-speed milling cutting force was orthogonal and single factor tests, test results prove that the orthogonal and single factor test results consistent, using least squares method on orthogonal Experimental data built the high-speed milling force prediction model of GH4169, and analysed the causes of the impact of milling parameters on cutting force.On the formation mechanism of high-speed milling of the surface, the establishment of a maximum height of the surface residual surface roughness geometry and a high degree of plastic deformation mechanics model; High-temperature alloy GH4169 orthogonal and single-factor surface roughness test, and analysed the causes of the impact of milling parameters on the surface roughness, according to the orthogonal data using least squares method to establish a high-speed milling of high-temperature alloy GH4169 empirical model predict the roughness. Established the formula theory of high-speed machining cutting force, we can see the friction angle and shear angle theory has an important effect of cutting force and high-speed processing conditions derived formula for calculating the shear angle; Test by turning a specific cutting conditions are the friction angle, shear angle of the size of the cutting speed on the friction coefficient of rules and reasons. Finally, high-speed milling temperature field were discussed, the high-speed line heat source for high-speed milling has been simplified to solve, the establishment of a high-speed milling temperature field analytical formula;High-temperature alloy GH4169 temperature test carried out high-speed milling, the establishment of the milling temperature with variation of milling parameters curve, and the reasons were analyzed.