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Influence of size effect on burr formation in micro cutting

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Abstract

Burr is an important character of the surface quality for machined parts, and it is even more severe in micro cutting. Due to the uncut chip thickness and the cutting edge radius at the same range in micro cutting process, the tool extrudes the workpiece with negative rake angle. The workpiece flows along the direction of minimum resistance, and Poisson burr is formed. Based on the deformation analysis and experiment observations of micro cutting process, the factor for Poisson burr formation is analyzed. It is demonstrated that the ratio of the uncut chip thickness to the cutting edge radius plays an important role on the height of Poisson burr. Increasing the uncut chip thickness or decreasing the cutting edge radius makes the height of exit burr reduce. A new model of micro exit burr is established in this paper. Due to the size effect of specific cutting energy, the exit burr height increases. The minimum exit burr height will be obtained when the ratio of uncut the chip thickness to the cutting edge radius reaches 1. It is found that the curled radius of the exit burr plays an important role on the burr height.

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Authors and Affiliations

  1. School of Mechanical Engineering, Shandong University, Jinan, 250061, People’s Republic of China

    Tao Zhang & Zhanqiang Liu

  2. Key Laboratory of High Efficiency and Clean Mechanical Manufacture (Shandong University), Ministry of Education, Jinan, People’s Republic of China

    Tao Zhang & Zhanqiang Liu

  3. School of Mechanical & Automotive Engineering, Shandong Polytechnic University, Jinan, 250353, People’s Republic of China

    Chonghai Xu

Authors
  1. Tao Zhang
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  2. Zhanqiang Liu
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  3. Chonghai Xu
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Correspondence to Zhanqiang Liu.

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Zhang, T., Liu, Z. & Xu, C. Influence of size effect on burr formation in micro cutting. Int J Adv Manuf Technol 68, 1911–1917 (2013). https://doi.org/10.1007/s00170-013-4801-8

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  • DOI: https://doi.org/10.1007/s00170-013-4801-8

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