Parallel synchronous orthogonal turn-milling flutter stability lobe graph prediction method

Abstract

The invention discloses a parallel synchronous orthogonal turn-milling flutter stability lobe graph prediction method, and belongs to the technical field of machining and manufacturing. The method isimplemented by the following steps of: sequentially performing steps; analyzing a parallel synchronous orthogonal turn-milling multi-degree-of-freedom vibration model; constructing a dynamic cutting thickness model for parallel synchronous orthogonal turn-milling cutting; constructing a dynamic cutting force model for parallel synchronous orthogonal turn-milling cutting; and calculating a frequency response function of the tool-workpiece system, solving a stability limit of parallel synchronous orthogonal turn-milling cutting machining, constructing a stability lobe graph of parallel synchronous orthogonal turn-milling cutting machining, and constructing a stability lobe graph of parallel synchronous orthogonal turn-milling cutting machining considering tool nose bounce. The parallel synchronous orthogonal turn-milling flutter area and the stable area can be accurately predicted, and the flutter problem in the parallel synchronous orthogonal turn-milling process can be effectively solved.

Description

technical field [0001] The invention belongs to the technical field of mechanical processing and manufacturing, and in particular relates to a method for predicting lobe diagrams of flutter stability in parallel synchronous and orthogonal turning and milling. Background technique [0002] As an advanced processing technology, turning and milling processing technology is widely used in the processing of key components in military and civilian fields such as aerospace, micro-small arms, and precision medical equipment. It has the advantage of completing part processing in one clamping. In order to improve the productivity of turning and milling, it is the key to adopt multi-milling cutters to turn and mill at the same time. Among them, parallel synchronous orthogonal turning and milling is a typical multi-milling cutter turning and milling method. Like other cutting methods, parallel synchronous orthogonal turning and milling process also inevitably produces chatter, which res...

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Problems solved by technology

[0004] At present, in the construction process of the traditional turning-milling chatter stability lobe diagram, the dynamic cutting thickness depends on the vibration displacement between different teeth of the same milling cutter, but this construction mechanism cannot be applied to parallel synchronous orthogonal turning During milling

Since the parallel synchronous orthogonal turning and milling process is completed by two milling cutters, the dynamic chip thickness is the result of the combined effect of the vibration displacement of the current tool and the vibration displacement of the other tool half a cycle ago. Structural coupling effect, the two milling cutters complete the cutting process together, so the original turning-milling chatter prediction model is not suitable for the prediction of parallel synchronous orthogonal turning-milling chatter

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