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

고정밀 회전체의 불평형 변동에 따른 회전정밀도 영향에 관한 연구

  • 김상화 (한국폴리텍VII대학구미캠퍼스 자동화시스템과) ;
  • 김병하 (경일대학교 기계자동차학부) ;
  • 진용규 ((주)카스윈)
  • Published : 2012.06.30

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.

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References

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