Determination of Mathematical Model in Structural Analysis of Machine Tools : 1st Report, Model of Basic Structural Component Using Rigidity Distribution Diagram

抄録

The study on the computer aided design system for machine tool structures has made a startling progress. The present computing methods cannot be applied to the absolute estimation of structural rigidity, only based on the information from engineering drawings, because there are some problems in the determination of the mathematical model. In future, it is, therefore, necessary to estimate absolutely and quantitatively the rigidity of a machine tool as a whole, using the information from engineering drawings. There are, however, two difficult aspects to the problems; one is a reasonable procedure for the deter-mination of the mathematical model to analyse the characteristics of the structural components, and the other is a procedure concerning how to incorporate the joint characteristics into the mathematical model. In this paper, therefore, a new reasonable procedure to determine the mathematical model using the rigidity distribution diagram for the basic structural component was proposed, and as an example, the static stiffness of the column of a floor type horizontal boring machine was analysed and the propriety of the procedure was certified.