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Development of the shell structures fabrication CAM system for direct metal lamination using arc discharge-lamination height error compensation by torch feed speed control-

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Abstract

The direct metal lamination is a kind of the additive manufacturing process using the arc welding technology; where the molten metal made by the arc discharge is accumulated successively in this process. Overhanging shapes can be fabricated without support materials but lamination height error is caused in largely inclined area. In this paper, the lamination height error was estimated by using the accumulated metal shape model. Then, the lamination height error was compensated by changing welding torch feed speed so that the top surface of the laminated layer became horizontal. As a result, not only the lamination height error was decreased by 50%, but average inclination angle error was decreased by 50%.

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Abbreviations

I :

Welding current

V :

Welding voltage

F :

Torch feed speed

H :

Target lamination height per layer

θ :

Inclination angle

e :

Molten metal dropped point error

a :

Coefficient of symmetric parabola which is approximated as the bead top surface profile

H θ :

Lamination height which is actually required

F θ :

Torch feed speed when inclination angle is θ

R 2 :

Coefficient of determination

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Authors and Affiliations

  1. Department of Mechanical Systems Engineering, Tokyo University of Agriculture and Technology, 2-24-16, Naka-cho, Koganei Tokyo, Japan, 184-8588

    Takeyuki Abe & Hiroyuki Sasahara

Authors
  1. Takeyuki Abe
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  2. Hiroyuki Sasahara
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Correspondence to Takeyuki Abe.

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Abe, T., Sasahara, H. Development of the shell structures fabrication CAM system for direct metal lamination using arc discharge-lamination height error compensation by torch feed speed control-. Int. J. Precis. Eng. Manuf. 16, 171–176 (2015). https://doi.org/10.1007/s12541-015-0022-4

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  • DOI: https://doi.org/10.1007/s12541-015-0022-4

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