High Temperature Alloy GH4169 HSM Theoretical and Experimental Research
|School||Qingdao Technological University|
|Course||Mechanical Manufacturing and Automation|
|Keywords||High-temperature alloys GH4169 Milling Parameters Milling force Surface roughness Milling heat|
The high-temperature nickel-based alloy GH4169 is typical of the difficult-to-machine materials, widely used in the aerospace industry. Small thermal conductivity, coefficient of friction and the reason of the chip and the rake face contact area is small, so that the cutting force, cutting temperature, serious tool wear in high-speed machining, affect the efficiency of processing paper nickel-based superalloy GH4169 study of high-speed milling milling force, surface roughness, friction angle shear angle as well as the milling temperature theoretical and experimental studies. Overview of high speed machining technology will become the mainstream of the future cutting speed cutting its unique advantages, the other with the increasingly widespread use of difficult to machine materials in industrial production, its high-speed processing technology is hot issue. By simplifying the cutting model, 2D milling force model, established on the basis of three-dimensional oblique cutting cutting force model; orthogonal experiments and single-factor experiments on high-speed milling the GH4169 milling force experiments prove that the orthogonal experiment The experimental results are consistent results with single factor orthogonal experimental data using the least squares method to establish a high-speed milling the GH4169 of milling force prediction model, and milling parameters on milling force investigated the reasons were analyzed. Established to explore the surface of the formation mechanism of high-speed milling the the residual maximum height geometric model of the surface roughness of the surface and highly mechanical model of the plastic deformation; surface roughness orthogonal experiment and single factor experiments of high temperature alloy GH4169 milling parameters on surface roughness the degree of influence of the analysis of high-speed milling high-temperature alloy GH4169 roughness predictive empirical model based on orthogonal experimental data using the least squares method. The formula of cutting force in high-speed machining theory can be seen that the friction angle and shear angle has important implications for the theory of cutting forces and derive a formula for calculating the angle of shear in the high-speed machining conditions; specific cutting conditions by turning experiments under the friction angle, shear angle of the cutting speed on the friction coefficient of law and reason. The temperature field of high-speed milling, high-speed line heat source of the high-speed milling simplify solving, analytical formulas of the temperature field of high-speed milling; experimental high-speed milling temperature of high-temperature alloy GH4169 established the parameters of the milling temperature with milling The variation of the curve, and analysis of its causes.