Real-time simulation method and system for milling of digital twin-driven thin-walled workpiece

Abstract

The invention discloses a real-time simulation method and system for milling of a digital twin-driven thin-walled workpiece. The method comprises the steps of providing milling data for a real-time simulation process of milling of the thin-walled workpiece by constructing a data perception model of a numerical control milling machine; discretizing a tool path in the milling process, and solving a finite element analysis result odb file by setting a life-death unit and applying unit milling force on the basis of a thin-walled workpiece finite element analysis model; on the basis of a numerical control milling machine data sensing model, obtaining real-time milling force, and solving actual stress and deformation of the thin-walled workpiece and stored in a vtu format; and in the milling machining process of the thin-walled workpiece, realizing real-time simulation of milling machining of the thin-walled workpiece under the current tool-workpiece position and visual display of a webpage end.

Description

technical field [0001] The invention belongs to the technical field of manufacturing system automation, and in particular relates to a digital twin-driven real-time simulation method and system for milling of thin-walled parts. Background technique [0002] The CNC milling machine can process various features such as grooves, planes and curved surfaces, and is the main equipment for processing parts in the manufacturing workshop. With the rapid development of the aviation manufacturing industry, the proportion of aluminum alloy thin-walled parts is also increasing. Thin-walled parts have poor rigidity and are prone to deformation during processing; there are disturbances such as tool wear, spindle vibration and deformation during the processing, and the milling force changes dynamically with the occurrence of disturbances; under fixed cutting parameters, the dynamic change of milling force leads to machining The uncertainty of the deformation makes the processing quality fl...

AI Technical Summary

Problems solved by technology

Comparing the above two methods, the first method needs to judge the material removal according to the material failure model, so the calculation efficiency is low and the actual working condition data cannot be correlated; the second method improves the calculation efficiency by setting the material removal unit in advance, but still It takes a long time; at the same time, both methods need to be solved in finite element software such as ABAQUS, ANSYS and AdvantEdge, and the analysis results can be viewed offline

[0004] Therefore, the simulation model established by the above finite element analysis method cannot meet the requirements of real-time simulation, and a real-time simulation method needs to be developed

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