Journal of the Korean Society of Manufacturing Process Engineers (한국기계가공학회지)

The Korean Society of Manufacturing Process Engineers (한국기계가공학회)
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Practical Turret Stiffness Calculation Model to Modify Lathe Structure

선반 구조변경을 위한 현장용 공구대 강성계산모델

  • Heo, Seong-Hyeok (Department of Mechanical System Engineering, Gyeongsang National University) ;
  • Kim, Su-Jin (School of Mechanical and Aerospace Engineering, Gyeongsang National University)
  • 허성혁 (경상대학교 기계시스템공학과) ;
  • 김수진 (경상대학교 기계항공공학부)
  • Received : 2017.07.24
  • Accepted : 2017.08.06
  • Published : 2017.10.31
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Abstract

In this research, a practical stiffness calculation method is developed and applied for modifying the height of the headstock, turret, and tailstock of a CNC lathe to enlarge the turntable diameter. The casting structure is assumed to be a rigid body and the linear motion element to be an elastic spring to simplify the turret stiffness calculation model. The stiffness of the sliding guide and ball screw of the original lathe is measured with a push tester and LVDT sensor, and the turret stiffness of the modified lathe is predicted and compared with experimental results to verify the model. The measured stiffness of the original turret is $0.17kN/{\mu}m$ and that of the modified turret is $0.11kN/{\mu}m$, i.e., an 18% difference from the predicted result. The verified stiffness calculation model can be used to develop another modified lathe.

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References

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