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An Analytical Design Method for Milling Cutters With Non-Constant Pitch to Increase Stability
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EngineeringIndustrial EngineeringMechanical EngineeringModeling ToolComputer-aided DesignStructural OptimizationComputational MechanicsTool UseSocial SciencesPitch VariationMachine ToolIncrease StabilityAnalytical Stability ModelTool WearDesignManufacturing EngineeringAbstract Chatter VibrationsIndustrial DesignMaterial MachiningMechanical SystemsAnalytical Design MethodVibration ControlNon-constant Pitch
Abstract Chatter vibrations result in reduced productivity, poor surface finish and decreased cutting tool life. Milling cutters with non-constant pitch angles can be very effective in improving the stability of the process against chatter. In this paper, an analytical stability model and a design method are presented for non-constant pitch cutters. An explicit relation is obtained between the stability limit and the pitch variation which leads to a simple equation for optimal pitch angles. A certain pitch variation is effective for limited frequency and speed ranges which are also predicted by the model. The improved stability, productivity and surface finish are demonstrated by several examples.