대형 고속가공기의 스핀들 설계

Abstract

This paper describes the design of the spindle of a large high-speed machine. Large high-speed machines aredesigned to have a rotational speed of 10,000 rpm or more and a safety factor of 3 or more to increase themachining efficiency. Therefore, the spindle was modeled, and static structural and modal analyses of themodeled spindle were performed. The results showed that the maximum displacement was within 0.012 mm, thesafety factor was greater than 3.2, and the natural frequency was 33.55 Hz. Based on the design results, tests ofcharacteristics such as rotation speed, vibration, and temperature of the manufactured spindle were conducted. Asa result of the experiment, the spindle temperature was 21.3 ℃ at a maximum rotational speed of 10,000 rpm,the spindle frequency was 7.96 65.97 Hz, and the spindle noise had a maximum of 81.6 dB, all of which –satisfied all the determined spindle specifications. Therefore, the designed spindle can be attached to large-scalehigh-speed machines.