In this study, we carried out interrupted cutting of carbon steel for machine structure(SM20C) with uncoated carbide tool and analyzed anova test and confidence interval to find influential factor to surface roughness, and obtained regression equation. Rhe results are follows: First, we found that affected factor to surface roughness in interrupted cutting was feed rate. Secondly, the cutting speed and depth of cut was small affected to surface roughness. Finally, from multi-regression analysis of interrupted cutting experimental result, obtained regression equation and it’s coefficient determination was 0.814 and it means that regression equation was predictable. Compared with other continuous cutting, if feed rate increase, surface roughness will grow in interrupted cutting.

Abstract
 1. 서론
 2. 실험장치 및 방법
  2.1 실험장치
  2.2 실험방법
 3. 실험결과 및 고찰
 결론
 References

• 이이선(BM works 기술연구소) | Yi-Seon Rhie
• 배명일(충남대학교 기계금속교육과) | Myung-Il Bae Corresponding Author