PREDICTION OF LASER WELD BEAD PROFILE THROUGH AN INVERSE PROBLEM APPROACH

2018 ◽  
Author(s):  
Elisan dos Santos Magalhães ◽  
Luiz Eduardo dos Santos Paes ◽  
Milton Pereira ◽  
Sandro Metrevelle Marcondes de Lima e Silva
Keyword(s):  
Inverse Problem ◽  
Weld Bead ◽  
Laser Weld ◽  
Bead Profile

Study for Improving Laser Beam Welding Efficiency

2015 ◽  
Vol 811 ◽  
pp. 57-62 ◽  
Author(s):  
Robert Ciobanu ◽  
Octavian Donţu ◽  
Daniel Besnea ◽  
Alina Spanu ◽  
Iulian Avarvarei
Keyword(s):  
Laser Radiation ◽  
Laser Beam ◽  
Source Parameters ◽  
Laser Beam Welding ◽  
Weld Bead ◽  
Laser Source ◽  
Beam Power ◽  
Laser Weld ◽  
New Methods ◽  
Bead Profile

The aim of this paper is to highlight a method for improving laser beam efficiency. The laser weld bead profile depends on various parameters such as beam power, welding speed, wavelength of the laser radiation or the initial temperature of the material. Taking into account that laser beam welding efficiency is usually limited by synchronization of the laser source parameters, new methods were developed. In this paper is analyzed the influence of preheating the material and of the wavelength of laser radiation on the laser weld bead profile. Improvement in penetration depth was noted for preheating the material to around 140°C.

scholarly journals Weld bead profile of laser welding dissimilar joints stainless steel

2017 ◽  
Vol 257 ◽  
pp. 012072 ◽  
Author(s):  
Ghusoon R Mohammed ◽  
M Ishak ◽  
S N Aqida ◽  
Hassan A Abdulhadi
Keyword(s):  
Stainless Steel ◽  
Laser Welding ◽  
Weld Bead ◽  
Dissimilar Joints ◽  
Bead Profile

Overlapping optimization of hybrid deposited and micro-rolling additive manufacturing

2022 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Xushan Zhao ◽  
Yuanxun Wang ◽  
Haiou Zhang ◽  
Runsheng Li ◽  
Xi Chen ◽  
...  
Keyword(s):  
Additive Manufacturing ◽  
Design Methodology ◽  
Rolling Process ◽  
Weld Bead ◽  
Content Type ◽  
Profile Fitting ◽  
Overlapping Coefficient ◽  
Surface Flatness ◽  
The Mathematical Model ◽  
Bead Profile

Purpose This paper aims to summarize the influence law of hybrid deposited and micro-rolling (HDMR) technology on the bead morphology and overlapping coefficient. A better bead topology positively supports the overlapping deposited in multi-beads between layers while actively assisting the subsequent layer's deposition in the wire and arc additive manufacturing (WAAM). Hybrid-deposited and micro-rolling (HDMR) additive manufacturing (AM) technology can smooth the weld bead for improved surface quality. However, the micro-rolling process will change the weld bead profile fitting curve to affect the overlapping coefficient. Design/methodology/approach Weld bead contours for WAAM and HDMR were extracted using line lasers. A comparison of bead profile curves was conducted to determine the influence law of micro-zone rolling on the welding bead contour and fitting curve. Aiming at the optimized overlapping coefficient of weld bead in HDMR AM, the optimal HDMR overlapping coefficient curve was proposed which varies with the reduction based on the best surface flatness. The mathematical model for overlapping in HDMR was checked by comparing the HDMR weld bead contours under different rolling reductions. Findings A fitting function of the bead forming by HDMR AM was proposed based on the law of conservation of mass. The change rule of the HDMR weld bead overlapping spacing with the degree of weld bead rolling reduction was generated using the flat-top transition calculation for this model. Considering the damming-up impact of the first bead, the overlapping coefficient was examined for its effect on layer surface flatness. Originality/value Using the predicted overlapping model, the optimal overlapping coefficients for different rolling reductions can be achieved without experiments. These conclusions can encourage the development of HDMR technology.

scholarly journals Parameters controlling weld bead profile in conduction laser welding

2017 ◽  
Vol 249 ◽  
pp. 522-530 ◽  
Author(s):  
W.A. Ayoola ◽  
W.J. Suder ◽  
S.W. Williams
Keyword(s):  
Laser Welding ◽  
Weld Bead ◽  
Bead Profile

scholarly journals Coating Layer Characterization of Laser Deposited AlSi Coating over Laser Weld Bead

2016 ◽  
Vol 83 ◽  
pp. 597-605 ◽  
Author(s):  
Hongping Gu ◽  
Aldo Van Gelder
Keyword(s):  
Coating Layer ◽  
Weld Bead ◽  
Laser Weld

Effect of GMAW-CMT Heat Input on Weld Bead Profile Geometry for Freeform Fabrication of Aluminium Parts

2013 ◽  
Vol 465-466 ◽  
pp. 1370-1374 ◽  
Author(s):  
Abdullah Wagiman ◽  
Mohd Saidin Bin Wahab ◽  
Zazuli Mohid ◽  
Azuddin Mamat
Keyword(s):  
Heat Input ◽  
Gas Metal Arc Welding ◽  
Great Influence ◽  
Dendritic Structure ◽  
Weld Bead ◽  
Cold Metal Transfer ◽  
Cross Sectional ◽  
Freeform Fabrication ◽  
Single Pass ◽  
Bead Profile

In developing a new method for weld based freeform fabrication, parameter affecting the geometry of single-pass need to be determined as it has great influence on dimensional accuracy and mechanical property of metallic part. In this paper, profile geometry and microstructure of single pass weld bead developed using Gas Metal Arc Welding Cold Metal Transfer (GMAW-CMT) was investigated. Observation on cross sectional weld bead indicates GMAW-CMT has capability to produce free spatter and crack defect weld bead. Profile geometry measurement shows weld bead develop at higher heat input has width size larger than the weld bead develop at lower heat input. Microstructure examination in the substrate reveals formation of columnar dendritic, cellular and planar structure while at buildup layer exhibit equiaxed dendritic structure

A Study on the Comparison Between Activated TIG Variants on Weld Bead Profile of P91 Steel. Part: 1

2021 ◽  
pp. 67-81
Author(s):  
Purvesh K. Nanavati ◽  
Vishvesh J. Badheka ◽  
Solanki Darshan ◽  
Idhariya Jaynish ◽  
Chintan Patel ◽  
...  
Keyword(s):  
Steel Part ◽  
Weld Bead ◽  
P91 Steel ◽  
Bead Profile
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