Research on Multi-Parametric Coupling Design Method of Deformable Boring Bar in Embedded Giant Magnetostrictive Actuator
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International Journal of Precision Engineering and Manufacturing https://doi.org/10.1007/s12541-020-00414-9
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Research on Multi‑Parametric Coupling Design Method of Deformable Boring Bar in Embedded Giant Magnetostrictive Actuator Huanghu Peng1,3 · Hao Xu1 · Yijie Wu2 · Jinying Lu1 Received: 9 September 2019 / Revised: 28 April 2020 / Accepted: 4 September 2020 © Korean Society for Precision Engineering 2020
Abstract Deformable boring bar is the executive component of embedded giant magnetostrictive actuator (GMA), which plays a key role in the output performance of embedded GMA in precision machining of non-cylindrical piston pinhole. In this paper, a multi-parametric coupling design method was presented for deformable boring bar and giant magnetostrictive material. Firstly, the dynamic model of deformable boring bar was built. Second, the performance index of length-diameter ratio was introduced, and the problem of multi-parametric coupling design was solved by using the idea of nonlinear programming. The first-order natural frequency, the end output displacement and the output force of deformable boring bar were taken as the evaluation indexes to ensure the performance requirements of embedded GMA. Finally, according to project requirements and proposed method, an embedded GMA with high frequency response and large output displacement was further designed, which met the performance requirements of displacement and stiffness in precision machining of non-cylindrical piston pinholes and also verified the validity of the design method. Keywords Embedded giant magnetostrictive actuator · Deformable boring bar · Multi-parametric coupling design · nonlinear programming
1 Introduction Giant magnetostrictive actuator (GMA) is a kind of precision electromechanical component, which is widely used because of its nanometer output precision, high frequency and large thrust output [1, 2]. For example, GMA is used as displacement actuator in precision machining [3, 4], and as active vibration isolator component in vibration field [5]. GMA can be divided into direct GMA and embedded GMA according to its structure and magnetic circuit characteristics [1]. The giant magnetostrictive intelligent boring bar device designed in this paper belongs to embedded GMA, which can be used for precise boring of non-cylindrical * Huanghu Peng [email protected] 1
College of Engineering, Huzhou University, Huzhou 313000, Zhejiang, People’s Republic of China
2
State Key Laboratory of Fluid Power and Electromechanical Systems, Zhejiang University, Hangzhou 310027, Zhejiang, People’s Republic of China
3
ZheJiang Eco Environmental Technology CO., LTD, Huzhou 313000, Zhejiang, People’s Republic of China
piston pinholes to reduce it’s stress concentration [6]. At present, there have been many related studies about the design of direct GMA [7–9], and a relatively perfect design criterion has been formed, such as improving the intensity and uniformity of magnetic field, reducing eddy current loss and magnetic leakage, an
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