A Rapid Construction Method of Digital Prototype of Spindle System Based on Graph Theory

Abstract

The invention discloses a graph theory-based rapid construction method of a digital prototype of a spindle system. First, a drawing file is parsed, a line segment matrix is constructed, line segmentsare scaled, and offsetting is carried out, then a point set and an edge set formed by end points of the line segments in the line segment matrix are constructed, whether a gap exists between the linesegments in the edge set, and points at two ends of the gap are connected for closing the gap to obtain a new point set and edge set; multiple line segments in the new edge set are merged into one line segment for obtaining an updated point set and edge set; whether an isolated line segment exists in the updated edge set is checked, and the isolated line segment is deleted for obtaining a final point set and edge set; a graph G is constructed, a depth-first traversal algorithm in graph theory is utilized to traverse the graph G to find all closed loops existing in the final point set, and a closed-loop point set is constructed and simplified for obtaining a new closed-loop point set; and a closed-loop edge set and an area set are constructed. According to the method, a graph theory algorithm is utilized to realize rapid establishment of a digital prototype model, modeling efficiency is improved, and a modeling cycle is shortened.

Description

technical field [0001] The invention belongs to the technical field of digital mechanical design, and in particular relates to a rapid construction method of a spindle system digital prototype based on graph theory. Background technique [0002] The spindle is the core component of high-speed precision machine tools, and the lack of spindle design capability is one of the bottlenecks restricting the development of my country's machine tool industry. Traditionally, the design of the spindle adopts the method of experience plus trial and error, which requires repeated manufacturing, debugging, and testing of actual prototypes, and the preparation of a large number of physical prototypes. The development cycle is long and the development cost is high. With the rise of general-purpose CAE software, some companies have tried to analyze the characteristics of the spindle based on commercial CAE software, but the operation is often complicated, the modeling efficiency is low, the c...

AI Technical Summary

Problems solved by technology

When establishing the digital prototype of the spindle system, the modeling process is complicated and the modeling efficiency is low. The main manifestations are: when modeling the spindle system, it is necessary to manually identify the information of each axis segment, and manually input the information of each axis segment in turn, including segment length, inner diameter, outer diameter and other parameters, the modeling process is cumbersome and the modeling efficiency is low; when inputting the information of each shaft segment, sometimes input errors are caused due to the large number of shaft segments, which leads to the incomplete establishment of the digital prototype model of the spindle system Correct; when the dynamics and thermodynamics analysis is performed after the spindle system modeling is completed, the process of selecting and setting the boundary conditions of the spindle system is more complicated

[0005] Therefore, in order to quickly construct the digital prototype model of the spindle system, solve the problem of complex modeling and low efficiency of the digital prototype, and improve the efficiency of digital prototype modeling and analysis, it is necessary to propose a new rapid construction method of the spindle system digital prototype

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