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CSME 2019/12
Volume 40 No.6
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625-634
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Estimating Specific Cutting Constants via First Harmonic Force Components in Conventional End Milling Operations
Charles Ming Zhenga and Kadirikota Rajesh Babu b
aSchool of Mechanical & Automotive Engineering, Fujian University of Technology, Fuzhou, Fujian 350118, China.
bDepartment of Mechanical Engineering, Sri Venkateswara University College of Engineering, Tirupati, A.P 517502, India.
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Abstract:
Charge seepage in piezoelectric sensor often causes a zero-drift problem in measuring cutting force, which can influence the ability to get accurate cutting forces and cutting constants to monitor milling process with a long duration. To overcome this difficulty, a robust method for extracting cutting constants at any moment in milling by only using the measured first harmonic force components is presented. There are two steps in this method for estimating cutting constants. The first is to find the approximations of cutting constants from the ratio of the measured first harmonic force components, and the second utilizes the equations from the components of magnitude of first harmonic force as well as the approximations of cutting constants calculated in the first step to obtain the refined cutting constants by least square method. This paper also discusses the limitations of presented method. The validity of the proposed method is confirmed through milling experiments.
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Keywords: milling, first harmonic force, cutting constants, LGCC.
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©
2019
CSME , ISSN 0257-9731
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