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Acta Armamentarii ›› 2016, Vol. 37 ›› Issue (6): 1066-1074.doi: 10.3969/j.issn.1000-1093.2016.06.014

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Influence of Tool Vibration Characteristics on the Hole Roundness Morphology in BTA Deep-hole Drilling

KONG Ling-fei, NIU Han, HOU Xiao-li, LIN Hong-bin, WANG Jie   

  1. (School of Mechanic and Precision Instrument Engineer, Xi’an University of Technology, Xi’an 710048, Shaanxi, China)
  • Received:2015-08-05 Revised:2015-08-05 Online:2016-08-06
  • Contact: KONG Ling-fei E-mail:lingfeikong@xaut.edu.cn

Abstract: According to the characteristics of deep-hole drilling, a roundness morphology model of machined hole influenced by the dynamical vibration of drilling tool is established. In order to satisfy the dynamic analysis precision, the drilling tool system is discretized into multi-elements beam with the local structure characteristics by using the semi-analytical method. Two adjacent elements must satisfy the continuity condition of modal shape function transfer matrix. Based on the aforementioned method, a novel analytical model of radial cutting depth is deduced to satisfy the precise calculation and analysis of roundness morphology in the progress of practical deep-hole drilling by using Newton-Raphson iterative method, and the relationship between tool vibration properties and roundness morphology is obtained. Various numerical examples are provided to validate the feasibility of proposed method, and the relevant results can be used for the prediction and on-line control of roundness error in the process of deep-hole machining.

Key words: manufaturing technology and equipment, deep-hole drilling, cutting tool vibration, roundness morphology, semi-analytical method

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