Evaluation method for machine beam design scheme by using fuzzy analytic hierarchy process

Abstract

The present invention discloses an evaluation method for a machine beam design scheme by using the fuzzy analytic hierarchy process. The method comprises the following steps: determining a beam designrequirement through investigation and consultation, mapping the beam design requirement to a beam engineering characteristic index, and converting the beam design requirement into a beam design element; screening a design element parameter combination to formulate the beam candidate scheme, and carrying out the three-dimensional modeling to obtain a beam engineering characteristic simulation value; and establishing a beam design scheme evaluation system, using the fuzzy analytic hierarchy analysis process to establish a fuzzy judgment matrix for the relative weight calculation, and solving the differentiation influence degree of the beam engineering characteristic index on each scheme so as to obtain the final score of the beam design scheme and to determine the optimal scheme. Accordingto the method disclosed by the present invention, the customer demand is emphasized, the weights of the factor indexes which affect the beam design scheme evaluation is comprehensively considered, theproblem of multi-level and fuzzy beam design scheme comprehensive evaluation is solved, and the method has the characteristics of flexibility, conciseness, easy program-programming, and the like.

Description

technical field [0001] The invention belongs to the field of machine tool design, and relates to an evaluation method for the design scheme of key parts of the machine tool, in particular to an evaluation method for the design scheme of the crossbeam of the machine tool using fuzzy hierarchical analysis. Background technique [0002] As an important part of the CNC machine tool, the beam of the machine tool bears the weight of key components such as slides, rams, and spindles. The deformation and vibration of the beam caused by its own gravity and external loads will directly affect the overall performance of the machine tool. Affect the geometric accuracy and surface processing quality of the workpiece. The traditional beam design mostly relies on empirical design to process the actual object first, and then assemble it on the machine tool for testing. Based on various test results, it judges the superiority of the performance of the structural solution, determines the modi...

AI Technical Summary

Problems solved by technology

When considering the performance of the beam scheme, the static and dynamic performance of the beam is only used as the evaluation index, and the improvement of the static and dynamic performance is one-sidedly pursued, and the impact of customer demand indicators such as cost and processing efficiency on the selection of the machine tool beam structure design scheme is not considered. to satisfy the market's needs

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