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| The Micro-milling technology based on Micro-machine is widely used in the precision manufacturing industry and is the most suitable for producing complex and micro 3D geometries and shapes. Nickel-based superalloys Inconel718 can well meet the demand for complex and micro 3D geometries and shapes, and can endure high temperature, high load and corrosive conditions of parts due to its superior properties. However, Inconel718 is a well-known difficult-to-cut material. At present, researches on the Micro-milling of nickel-base superalloys material have never been publicly reported, and the Micro-milling mechanism of this kind of material is not clear, whereas the study on cutting force is of critical significance to reveal machining mechanism. This paper applies ultrafine particle coated cemented carbide tools to conduct micro groove milling orthogonal experiment on typical difficult-to-cut material Inconel718, and studies the influence principle of cutting parameters (which include Extended length of micro-milling cutter, spindle speed, axial depth of cut and feed per tooth) on cutting force; and based on the above, the micro milling force prediction models are built according to experiment results, in addition the significance test and fitting degree test are conducted on the prediction models; The test results show that the three-dimensional cutting forces model can be used to predict and control during micro-milling Nickel-based superalloys Inconel718. |
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| Keywords:Micro-milling; cutting force model; cutting parameters; Inconel718 |
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