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Drilling torque control using spindle motor current and its effect on tool wear

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Abstract

Drilling torque was estimated using the spindle motor current and controlled through feedrate manipulation for the reduction of drill wear. A PID controller was used to control the cutting torque measured indirectly from the spindle motor current. The effect of cutting torque control on drill flank wear was also investigated. Experimental results showed that the drilling torque was well-regulated at a given reference level and the risk of drill failure and drill flank wear were reduced remarkably through cutting torque control. Moreover, the suggested cutting torque control system does not disturb the cutting process and is practical in an industrial environment.

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Abbreviations

I rms :

Root mean square value of spindle motor current (ampere)

I u,v,w :

U, V, and W phase current of the spindle motor (ampere)

I rms,c :

Spindle motor current due to cutting (ampere)

I rms,t :

Tare current of the spindle motor (ampere)

T c :

Cutting torque (Nm)

T s :

Sampling rate (Hz)

N r :

Number of revolution

N d :

Number of data per revolution

K I :

Spindle motor current gain (ampere N−1m−1)

τ d :

Time constant of the spindle system (sec)

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Author information

Authors and Affiliations

  1. Department of Mechanical Engineering, Ansan College of Technology, 425-792, Kyungki, Korea

    Young T. Oh

  2. Department of Mechanical and Information Engineering, University of Seoul, 130-743, Seoul, Korea

    Won T. Kwon

  3. School of Mechanical and Aerospace Engineering, Seoul National University, 151-742, Seoul, Korea

    Chong N. Chu

Authors
  1. Young T. Oh
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  2. Won T. Kwon
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  3. Chong N. Chu
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Corresponding author

Correspondence to Chong N. Chu.

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Oh, Y.T., Kwon, W.T. & Chu, C.N. Drilling torque control using spindle motor current and its effect on tool wear. Int J Adv Manuf Technol 24, 327–334 (2004). https://doi.org/10.1007/s00170-002-1490-0

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  • DOI: https://doi.org/10.1007/s00170-002-1490-0

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