Optimum design method used for cross beam structure of numerical control machine tool and employing extreme dimension adjustment

Abstract

The invention discloses an optimum design method used for a cross beam structure and employing extreme dimension adjustment. The method optimizes the distribution pattern of inner rib plates of the cross beam structure and the key dimension adjustment of the structure. The method comprises the steps of obtaining the cross beam structure with better static and dynamic characteristics by confirming the distribution pattern of the inner rib plates of the cross beam structure, conducting sensitivity analysis on the key dimension according to performance indexes to be achieved within the adjustable range of the dimension, dividing a dimension variable into high sensitivity and low sensitivity, increasing the dimension of the high-sensitivity variable to an upper limit, decreasing the dimension of the low-sensitivity variable to a lower limit, modeling for finite element analysis, conducting repeated adjustment by sequentially decreasing the dimension of the high-sensitivity variable and sequentially increasing the dimension of the low-sensitivity variable according to analysis results, and obtaining the new cross beam structure. The optimum method is reasonable and simple to operate, and can realize optimization design of the cross beam structure of a machine tool.

Description

technical field [0001] The invention belongs to the field of mechanical design, and relates to a design method of a key structure of a machine tool, in particular to a method for optimizing the design of a crossbeam structure of a numerically controlled machine tool adopting extreme size adjustment. technical background [0002] With the continuous development of science and technology, CNC machine tools are more and more widely used in the manufacturing industry. The main structural design methods of CNC machine tools are mostly traditional empirical design or analogy design. The structure obtained by this design method can generally only meet the performance requirements of a single goal (such as smaller structural deformation); the current technology based on software optimization is basically Only single-objective optimal design can be achieved. For the more complex key structure of the machine tool, multi-objective optimization is generally required to make it have the...

AI Technical Summary

Problems solved by technology

The main structural design methods of CNC machine tools are mostly traditional empirical design or analogy design. The structure obtained by this design method can generally only meet the performance requirements of a single goal (such as smaller structural deformation); the current technology based on software optimization is basically The optimal design that can only achieve a single objective

Images