Abstract
Fast tool servos (FTS) for single point diamond turning are widely employed for machine optical free-form surfaces. A FTS with a large stroke and a high bandwidth can increase the efficiency of a machine and complexity of a work-piece. In this paper, a FTS driven by a Maxwell electromagnetic actuator is developed to obtain a relatively large stroke and high bandwidth. In this study, a multi-objective optimization model is proposed based on the whole system by considering electromagnetic driving principles, kinematic model, and mechanical model. The proposed optimization model can be applied to solve the parameters of electromagnetic actuators with diverse application requirements. A sequential quadratic programming (SQP) algorithm is implemented to solve the problem. The optimization results are verified through both finite element analysis and experiments. The optimized FTS can produce 49.55 μm of full stroke with a frequency response of 3.2 kHz.
Highlights
Optical free-form surfaces are increasingly used in various areas, such as the aerospace, energy, and life science
The single-point diamond turning method based on the fast tool servo (FTS) system is widely adopted due to the advantages of high accuracy and superior process efficiency [1]
Similar conclusions have and a multi-objective optimization model is built based on the driving model of electromagnetic been reported by Lu and Xie [15,16]
Summary
Optical free-form surfaces are increasingly used in various areas, such as the aerospace, energy, and life science. Rakuff et al used finite element analysis to optimize completed ultra-precision machining successfully due to its characteristics of a mm stroke and the parameters of their specially designed leaf flexure before adjusting the damping ratio of the FTSa bandwidth. According to a series of bandwidth surveys, a compared fast tool servo driven (at by the the same electromagnetic actuator has the bandwidth) and a higher to VCM-FTS stroke) [15,16]. According to ability to obtain a relatively larger stroke and higher bandwidth compared to and VCMa series of surveys, a fast tool servo driven by the electromagnetic actuator has the ability to obtain a FTS. Relatively larger strokethe andcharacteristics higher bandwidth compared to PZT-FTS
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