Journal of the Korean Society for Precision Engineering (한국정밀공학회지)

Korean Society for Precision Engineering (한국정밀공학회)
권호 표지

Cutting Torque Control in Drilling Part 2 : Drilling Torque Control Using Spindle Motor Current and Its Effect on Drill Flank Wear

드릴 공정시 절삭 토크 제어 제 2 편 : 주축 모터 전류를 이용한 드릴링 토크의 제어와 드릴 플랭크 마모에 대한 영향

  • O, Yeong-Tak (Institude of Advanced Machinery and Design, Seoul National University) ;
  • Kim, Gi-Dae (Dept.of Mechanical Automotive Engineering, Catholic University of Daegu) ;
  • Ju, Jong-Nam (Dept.of Mechanical Aerospace Engineering, Seoul National University)
  • 오영탁 (서울대학교 정밀기계설계공동연구소) ;
  • 김기대 (대구가톨릭대학교 기계자동차공학부) ;
  • 주종남 (서울대학교 기계항공공학부)
  • Published : 2001.08.01
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Abstract

Drilling torque was measured indirectly using the spindle motor current and controlled in real time through feedrate manipulation in a machining center. The PID controller designed in the previous paper was applied to drilling torque control. A series of cutting experiments were performed for various cutting conditions. Experimental results showed that the drilling torque was well regulated at a given reference level by feedrate manipulation in all cutting conditions. The increase in the cutting torque and temperature according to the increase in machining depth was suppressed and the risk of the drill failure and the drill flank wear were reduced remarkably through cutting torque control. Moreover, the suggested cutting torque control system doesn\`t disturb the cutting process and is practical for industrial environment. Therefore, the proposed culling torque control system will contribute to productivity improvement in drilling process.

Keywords

References

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