Browse > Article

A Study on the Rotation Accuracy According to Unbalance Variation of High Precision Spindle Unit for Machine Tool  

Kim, Sang-Hwa (한국폴리텍VII대학구미캠퍼스 자동화시스템과)
Kim, Byung-Ha (경일대학교 기계자동차학부)
Jin, Yong-Gyoo ((주)카스윈)
Publication Information
Journal of the Korean Society of Manufacturing Process Engineers / v.11, no.3, 2012 , pp. 174-181 More about this Journal
Abstract
The spindle unit is a core part in high precision machine tool. Rotation accuracy of spindle unit is needed for high dignity cutting and improving the performance of machine tool. However, there are many factors to effect to rotational error motion(rotation accuracy). This study studied how rotational error motion is variation when unbalance amount is variation. Rotation accuracy of initial spindle unit is decided depending on parts and assembly such as bearing. When it is rotation, vibration and noise is appeared depending on volume of unbalance amount, so it works to decrease unbalance amount. The purpose of the study tests that unbalance amount how much effects to initial rotation condition. The result of the study shows that accuracy of parts and assembly is highly necessary to reach high rotation accuracy and unbalance amount hardly effects to initial rotation accuracy. However, it shorten spindle's life because vibration and noise is increasing by increasing unbalance amount and we can expect situation that rotation accuracy is falling by long time operation.
Keywords
Unbalance; Error Motion; Machine Tool; Rotation Accuracy; Synchronous Error Motion; Asynchronous Error Motion;
Citations & Related Records
연도 인용수 순위
  • Reference
1 Wei Gao, Chun-Hong Park, "High Precision Measurement of Rotational Accuracy", Korean Society for Precision Engineering, Vol. 21, No. 8, pp 7-13, 2004.
2 Chan-Hong Lee, Hu-Sang Lee, "Rotational Characteristics of High Precision Spindle Unit with Ball-Hydrostic Bearing", Korean Society for Precision Engineering, pp. 663-667, Spring Conference, 2000.
3 Jong-Kwan Kim, Jooung-Kie Lee, "A Study on the Evalution of Rotational Accuracy of High Speed Spindle", The Korean Society for Noise and Vibration Engineering, Vol. 5, No 4, pp. 483-492, 1995.
4 H. J. Shin, S. W. Lee, H. J. Park, "Combined Error Performance of Machine Tool Spindle", Korean Society for Precision Engineering, pp. 333-337, Autumn Conference, 1996.
5 Young-Ho Choi, Doo-Pyo Yun, Kwang-Young Kim, "Analysis Element in Influenced Spindle Vibration of High-Speed Processing Machine", Korean Society for Machine Tool Engineering, pp. 340-345, Spring Conference, 2001.
6 "Test code for machine tools - Part7:Geometric accuracy of axes of rotion", Korean Industrial Standard KS B ISO 230-7 : 2009.
7 "Test code for machine tools-part3: Determination of thermal effects", Korean Industrial Standard KS B ISO 230-3 : 2007.
8 Eric, "Precision measurement in high speed spindles", Lion Precision co. 2007.