Abstract
A method is presented which is a kind of combining theoretic analysis and experiment to obtain the equivalent dynamic parameters of linear guideway through four steps in detail. From statics analysis, vibration model analysis, dynamic experiment, and parameter identification, the dynamic modeling of linear guideway is synthetically studied. Based on contact mechanics and elastic mechanics, the mathematic vibration model and the expressions of basic mode frequency are deduced. Then, equivalent stiffness and damping of guideway are obtained in virtue of single-freedom-degree mode fitting method. Moreover, the investigation above is applied in a certain gantry-type machining center; and through comparing with simulation model and experiment results, both availability and correctness are validated.
Highlights
The dynamic analysis and simulation technology of numerical control machine tool are a very important research direction in modern advanced manufacturing technology and equipment technology
The researchers, represented by Zhang et al [3] and Mao et al [4], build the fundamental property model of contact interface and multinode dynamic model; Dhupia et al [5] applies the frequency-domain joint part model with weak nonlinear characteristic to the basic machine tool modeling and predicts the processing performance. When it comes to identifying the parameter of the joint part, there are several main ways such as frequency response function identification method [6], response coupling method [7], and contact interface parameter optimization method which is based on finite element modeling [8]
From the perspective of material parameters and structural distortion and based on the elastic mechanics and vibration mechanics theory, the guideway contact part dynamic modeling method is established from these four aspects, “static stiffness model, vibration model, experimental parameter, and parameter identification.”
Summary
The dynamic analysis and simulation technology of numerical control machine tool are a very important research direction in modern advanced manufacturing technology and equipment technology. The researchers, represented by Zhang et al [3] and Mao et al [4], build the fundamental property model of contact interface and multinode dynamic model; Dhupia et al [5] applies the frequency-domain joint part model with weak nonlinear characteristic to the basic machine tool modeling and predicts the processing performance When it comes to identifying the parameter of the joint part, there are several main ways such as frequency response function identification method [6], response coupling method [7], and contact interface parameter optimization method which is based on finite element modeling [8]. The research results provide an effective and feasible solution channel and practical method to predict the machine performance in the pattern design phase
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