한국신뢰성학회지:신뢰성응용연구 (Journal of Applied Reliability)
- 제19권4호
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- Pages.311-317
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- 2019
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- 1738-9895(pISSN)
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- 2733-8320(eISSN)
DOI QR Code
알루미늄 파워 척의 구조 개선에 따른 수명 특성 연구
Study on Life Characteristic of Structural Improvement of Aluminum Power Chuck
초록
Purpose: The CNC lathe uses a power chuck operated by a hydraulic-driven rotating cylinder to grip the lathe stably, which is especially important during high-speed milling. In this paper, we suggest the cause of power chuck failure and then verify its reliability by improving its structure of internal parts. We also perform a life test and a pre/post major performance test on a prototype aluminum chuck, analyze its shape data, and propose shape and scale parameters.Methods: We used ANSYS mechanical software to provide a structural analysis of the prototype chuck body. Constraints were set to fixed conditions below the body with a load of 20 kN equivalent applied to the cylinder thrust. The life data analysis was performed using the Minitap program.Results: The shape and scale parameters of the prototype power chuck were 2.77 and 4,706,474 cycles, respectively.Conclusion: The prototype power chuck life span was analyzed as 521,512 cycles at the lower 95% confidence limit, meaning its reliability showed higher than its warranty life.