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Research Article

Year : 2016 | Volume: 1 | Issue: 1 | Pages: 10-15

Heat Flux for Welding Processes: Model for Laser Weld

Suresh Akella1*, Harinadh Vemanaboina, Ramesh Kumar Buddu2

doi:10.24951/sreyasijst.org/2016011002

Corresponding author

Suresh Akella*

Sreyas Institute of Engineering & Technology, Hyderabad-500068, India.

  • 1. Sreyas Institute of Engineering & Technology, Hyderabad-500068, India.

Received on: 1/6/2019

Revised on: 1/6/2019

Accepted on: 1/6/2019

Published on: 1/6/2019

Abstract

An accurate and physically suitable heat flux model is required to represent the welding process. Experimentally established processes are referred. A well-established model in heat flux representation is the double ellipsoid model of Goldak. It provides non-symmetry of the front and rear heat to the electrode as given by Lindgren. Though this is a good representation, it can be simplified to a conical heat model for the molten metal with a Gaussian heat input. This combination is suited for laser beam welding process as the heat beam focuses through a conical collate. Proposals for improved linear combinations of two fluxes are defined and different distributions of heat fluxes are compared. It also includes the evaluation of Gaussian distribution of heat flux to explain process capability.

Keywords

Welding, Heat flux, Double ellipsoid model, Gaussian heat input, Laser beam.