Abstract
In order to meet increasing demand for higher productivity and flexibility, recently many kinds of multi-functional machine tools, which are capable of multiple machining functions or different kinds of machining processes on one machine, have been developed and widely used in manufacturing industries. In this study, a multi-functional turning lathe, which has two spindles and two turrets so that multiple turning operations and various machining processes could be performed simultaneously, has been developed. Furthermore, the equations of correlation between whole responses and cross responses of the two spindles have been derived to examine to what extent the two spindles affect each other’s vibrations.
Highlights
In the last couple of decades, as the demands are increasing to produce machine parts with higher productivity and accuracy at reduced cost, many researches and developments on multi-functional machine tools have been performed [1,2,3,4,5,10,11]
Careful consideration should be given to the effect of cross response on whole vibration response at each spindle in order to develop or design multi-spindle type multi-functional machine tools
In order to analyze how the two spindles affect each other’s vibrations in a dual spindle type multi-functional turning lathe when they are doing machining operations simultaneously, in this study, a generalized machine structure model under harmonic forces acting on two different nodes has been introduced and the correlation equations of the structural responses at the two nodes have been derived
Summary
In the last couple of decades, as the demands are increasing to produce machine parts with higher productivity and accuracy at reduced cost, many researches and developments on multi-functional machine tools have been performed [1,2,3,4,5,10,11]. It consists of 2 spindles and 2 turrets so that various machining process could be performed simultaneously. Regarding a multi-functional turning lathe that consists of two spindles, the two spindles operating simultaneously may affect each other because of interactions between their cutting forces. Ly, in this study, the equations of correlation between whole responses and cross responses of the two spindles have been derived and FEM harmonic response analysis has been carried out of the multi-functional turning lathe. A generalized machine structure model has been introduced for deriving the correlation equations
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