A point and line source model of laser keyhole welding
- 14 August 1988
- journal article
- Published by IOP Publishing in Journal of Physics D: Applied Physics
- Vol. 21 (8) , 1255-1260
- https://doi.org/10.1088/0022-3727/21/8/002
Abstract
The keyhole formed during penetration welding with a laser is modelled so far as its thermal absorption characteristics are concerned by the combination of a point and a line source. In this way a representation of the broader surface section of the weld is obtained in addition to the lower section. A simple analytical form for the temperature distribution is obtained and possible weld profiles are found numerically from this. These are compared with examples of actual welds; it is possible in this way to estimate the proportion of the laser power absorbed in each section of the weld. Graphs and some simple approximations are given which allow it to be done easily for a given weld.Keywords
This publication has 3 references indexed in Scilit:
- Upwelling in the liquid region surrounding the keyhole in penetration welding with a laserJournal of Physics D: Applied Physics, 1987
- A keyhole model in penetration welding with a laserJournal of Physics D: Applied Physics, 1987
- Some aspects of the fluid dynamics of laser weldingJournal of Fluid Mechanics, 1983