Abstract
One of the factors that influence the dynamic characteristics of machining systems is the cutting tool. Cutting tools are very diverse, and receptance coupling substructure analysis (RCSA) is essential for analyzing the dynamic characteristics of each tool. For RCSA, a full receptance matrix of the equipment and tools is essential. In this study, rotational degree-of-freedom receptance was estimated and analyzed using translational receptance. Displacement/moment receptance was analyzed according to the distance of the response point using the first-and second-order finite difference methods. The rotation/moment receptance was estimated according to the distance of the response point. Rotation/moment receptance was analyzed using Schmitz’s method and compensation strategies. The limitations of these strategies were analyzed, and the rotation/moment receptance for the beam under free-free boundary conditions was predicted using the second compensation strategy.
Highlights
To optimize the machining process and respond to abnormal conditions, it is essential to analyze chatter stability using the dynamic characteristics of the equipment and cutting tools
A chatter stability lobe diagram is utilized for chatter stability analysis, and an essential parameter is the dynamic characteristic of the machining system
The types of cutting tools utilized in processing equipment are very diverse, and it is very inefficient to change the cutting tools to analyze the dynamic characteristics of various cutting tools, perform vibration tests of processing equipment, and obtain dynamic characteristics
Summary
To optimize the machining process and respond to abnormal conditions, it is essential to analyze chatter stability using the dynamic characteristics of the equipment and cutting tools. The FRF of the entire machining equipment system is obtained by synthesizing the FRFs of the cutting tool and machining equipment, and the dynamic characteristics are predicted. Through the RCSA of various cutting tools, the FRF and dynamic characteristics of the equipment can be predicted It is more efficient in terms of time and cost to change solely the cutting tool and perform a vibration test rather than change the cutting tool repeatedly and perform a vibration test on the entire machining equipment [1,2,3,4,5,6]. It is difficult to obtain the rotational displacement and moment during the actual vibration test, and there is a disadvantage, in that the cost of additional experimental equipment is incurred. The finite-difference method is used, which is low in cost and relatively simple to obtain accurate results, does not require additional equipment, and performs post-processing using translational FRF. The rotation/moment FRF is estimated and analyzed using Schmitz’s method and a compensation strategy using modal parameters [11,12,13]
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