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Advances in Manufacturing ›› 2015, Vol. 3 ›› Issue (2): 105-110.doi: 10.1007/s40436-015-0112-7

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High-accuracy turning with slender boring bars

Knut Sørby1, Einar Sundseth2   

  1. 1 Department of Production and Quality Engineering, Norwegian University of Science and Technology, Trondheim, Norway;
    2 Sandvik Teeness AS, Trondheim, Norway
  • 收稿日期:2015-03-11 修回日期:2015-05-05 出版日期:2015-06-25 发布日期:2015-06-13
  • 通讯作者: Knut Sørby E-mail:knut.sorby@ntnu.no
  • 基金资助:

    The authors are grateful to Research Council of Norway for supporting this work through the "SmartTools" project (Grant No. 219309/O30).

High-accuracy turning with slender boring bars

Knut Sørby1, Einar Sundseth2   

  1. 1 Department of Production and Quality Engineering, Norwegian University of Science and Technology, Trondheim, Norway;
    2 Sandvik Teeness AS, Trondheim, Norway
  • Received:2015-03-11 Revised:2015-05-05 Online:2015-06-25 Published:2015-06-13
  • Contact: Knut Sørby E-mail:knut.sorby@ntnu.no
  • Supported by:

    The authors are grateful to Research Council of Norway for supporting this work through the "SmartTools" project (Grant No. 219309/O30).

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摘要： The paper presents the theoretical background for new approaches for achieving high accuracy in finish turning with slender tools. The approaches are developed especially for high-accuracy turning with vibrationsdamped boring bars with a length-to-diameter ratio up to 14. The approaches are based on established force models of turning operations and utilize a three-pass scheme where the deflection of the boring bar is calculated and compensated for in the final passes. Very good results are achieved in practical machining tests for a great variation of cutting conditions. Experiments show that the typical diameter error is 0.01 mm, even in situation where the tool deflection is 0.3 mm.

关键词: Turning, Precision, Boring bar

Abstract: The paper presents the theoretical background for new approaches for achieving high accuracy in finish turning with slender tools. The approaches are developed especially for high-accuracy turning with vibrationsdamped boring bars with a length-to-diameter ratio up to 14. The approaches are based on established force models of turning operations and utilize a three-pass scheme where the deflection of the boring bar is calculated and compensated for in the final passes. Very good results are achieved in practical machining tests for a great variation of cutting conditions. Experiments show that the typical diameter error is 0.01 mm, even in situation where the tool deflection is 0.3 mm.

Key words: Turning, Precision, Boring bar

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