Variable-pitch variable-rotating-speed milling flutter active and passive suppression method considering helical angle effect

Abstract

The invention discloses a variable-pitch variable-rotating-speed milling chatter active and passive suppression method considering a helical angle effect, which comprises the following steps: S1, establishing a variable-pitch milling cutter cutting model considering the helical angle effect, and constructing a variable-pitch variable-rotating-speed milling process kinetic equation considering thehelical angle effect based on a regeneration chatter theory; S2, based on a disturbance regeneration flutter effect mechanism, achieving an active and passive control method for realizing flutter suppression by selecting a milling cutter tooth pitch linear increasing model and a sinusoidal modulation main shaft rotating speed strategy; and S3, solving the model to obtain a stable lobe graph of themilling process, and taking the stable lobe graph as a theoretical basis for selecting efficient, high-quality and stable machining parameters. A variable-pitch variable-rotating-speed milling kinetic model is constructed by considering the helical angle effect, the fine integral full-discrete method is expanded to be suitable for multi-time-varying time-lag kinetic differential equation numerical solution, and the variable-pitch variable-rotating-speed milling stability lobe diagram considering the helical angle effect can be efficiently constructed.

Description

technical field [0001] The invention relates to the field of advanced manufacturing technology, in particular to a milling chatter prediction and suppression method, in particular to a variable pitch and variable speed milling chatter active and passive suppression method considering the helix angle effect. Background technique [0002] Difficult-to-machine materials such as superalloys and titanium alloys have excellent service performance and are widely used in the manufacture of key components in high-end fields such as aerospace. Difficult-to-machine materials are difficult to achieve high-speed machining due to large tool loss and severely limited cutting speed. At this stage, many methods are based on obtaining the cutting force stability lobe diagram, by selecting the appropriate combination of cutting parameters to achieve chatter-free material removal rate. However, higher material removal rates can also be obtained with milling chatter passive or active control me...

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Problems solved by technology

However, the actual milling process system has multiple degrees of freedom, resulting in large errors in prediction accuracy

[0006] In addition, the above work cannot consider the influence of the helix angle effect on the vibration control and suppression of milling

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