contributor author | Fuu-Ren Tsai | |
contributor author | Elijah Kannatey-Asibu | |
date accessioned | 2017-05-09T00:02:52Z | |
date available | 2017-05-09T00:02:52Z | |
date copyright | August, 2000 | |
date issued | 2000 | |
identifier issn | 1087-1357 | |
identifier other | JMSEFK-27415#420_1.pdf | |
identifier uri | http://yetl.yabesh.ir/yetl/handle/yetl/123966 | |
description abstract | The response of conduction mode laser weld pool dimensions, specifically weld width, to a step change in power input has been modeled using two-dimensional heat flow analysis. The goal is to develop a simplified model suitable for feedback control. The weld pool geometry was approximated by a tear-drop shape. The workpiece thermal properties were assumed to be lumped and temperature-independent. The result was a first-order weld pool thermal model. A series of experiments was performed using different welding conditions (plate thickness, step power changes, and welding speeds) to validate the model. The weld pool image was recorded using a vision system and digitized. The process time constant as calculated by the model was of the order of 10−4 seconds. The response of the laser machine, estimated by the least squares method, was found to be about 10−2 seconds, which is much slower than that of the weld pool. Thus, within the constraints of the assumptions on which the model is based, the entire laser welding process is considered to be dominated by the laser machine dynamics. [S1087-1357(00)00502-5] | |
publisher | The American Society of Mechanical Engineers (ASME) | |
title | Modeling of Conduction Mode Laser Welding Process For Feedback Control | |
type | Journal Paper | |
journal volume | 122 | |
journal issue | 3 | |
journal title | Journal of Manufacturing Science and Engineering | |
identifier doi | 10.1115/1.1285864 | |
journal fristpage | 420 | |
journal lastpage | 428 | |
identifier eissn | 1528-8935 | |
keywords | Heat | |
keywords | Temperature | |
keywords | Lasers | |
keywords | Heat conduction | |
keywords | Drops | |
keywords | Laser welding | |
keywords | Welding | |
keywords | Modeling | |
keywords | Feedback | |
keywords | Shapes | |
keywords | Machinery | |
keywords | Steady state | |
keywords | Equations | |
keywords | Dimensions | |
keywords | Flow (Dynamics) | |
keywords | Geometry | |
keywords | Thermal properties AND Temperature gradients | |
tree | Journal of Manufacturing Science and Engineering:;2000:;volume( 122 ):;issue: 003 | |
contenttype | Fulltext | |