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The sheared edges though, normally show a plastic deformation and might be considered as bevelled. This will give the process a great potential for the future use in many different applications.
Thus, LAH-welding tests have been performed both with and without oxides on hyhrid joint edges and on top and bottom surfaces. LaserOpto 33 2pp Sheared edges Shearing is also a frequently used blanking process in industry as it is cheap and fast. Also t e amount of pores is increased.
The arc welding processes have high heat input, and are typically conduction-limited processes producing wider and shallower welds at relatively low welding speeds. Conclusions Laser-arc-hybrid welding has been shown to be an effective welding process for joining of thick steel plates.
Plasma cut surfaces doenload not possible to weld dlwnload acceptable quality for 12 mm thick material. An interesting observation is the widening of the weld bead when welding surfaces with oxides, figure 3. With this method of preparing the joint, there will be no influence of oxides from the sheet edges, which we have shown can be a problem.
FC2 The joint preparation laser hybrid welding pdf download also influence the weld laser hybrid welding pdf download and quality.
The results to date from investigating the LAH-process for different industrial joint preparations, shows tremendous possibilities of obtaining excellent welding results.
Wire laser hybrid welding pdf download Contact tip MIG gas nozzle? Please note that Internet Explorer version 8. Laser cut material with downkoad oxides from the cutting process still present will give acceptable welds up to approximately 10 mm thickness, but for 12 mm material the oxides have to be removed in order to obtain welds without pores and excessive and irregular weld penetration.
Please use this link to notify us:. The LAH-process is rather insensitive to the shielding gas used, but the best results have been obtained for a mixture of He predominantAr and CO2 or O HK10 Plasma cut edges.
This important book gives a comprehensive account of dpwnload laser-arc welding technology and applications. In this project, the industrial partners in the project prepared the laser cut specimens by using their downloar cutting machines. However good results can be obtained with residual oxide layers on 8 mm plates figures 3.
In many papers no specific information dowbload presented on the parameters used, only their.
The LAH process will also be demonstrated in selected industrial laser hybrid welding pdf download but this work will be reported later. Useful gas mixtures were found in all Helium gas-mix combinations by which fully approved welding geometries were obtained. The fundamentals of this process have been presented in a number of papers, e. Arc Augmented Laser Welding. The drawbacks are the varying deformation of the sheet edges, depending of the shearing process parameters and shearing tools condition, and the necessity to orient the sheet to obtain a gap.
Laser-TIG hybrid welding process
This work has therefore been directed towards exploring the LAH process when welding thick structural steels under industrial conditions, i.
The main objective has been to learn the fundamentals of the laser arc hybrid welding for laser, plasma or mechanically cut, mm, thick sheet metal. Innovative Joining Methods for Shipbuilding. Laser hybrid welding pdf download of hybrid laser—arc welding lxser – Hybrid welding of magnesium alloysPagesL. Journals Books Register Sign in Help.
Laser-TIG hybrid welding process – PDF Drive
By introducing a controlled gap of 0,5 mm acceptable weld geometries could be obtained even for 12 mm material but the weld material contains some large pores.
The amount of oxides and dross may also vary considerably. HN11 b laser hybrid welding pdf download present at welding spec. The first part of the book reviews the characteristics of the process, including the properties of joints produced by hybrid laser-arc welding and ways of assessing weld quality. For more information, visit the cookies page. The experiments show that the influence of the oxides on the joint edges on the weld quality is minor at mm plate thickness.
Also a 17 kW CO2 – laser, was used at 12 kW power level. Reviews arc and laser welding including both advantages and disadvantages of the hybrid laser-arc approach Laser hybrid welding pdf download the characteristics of the process including the properties of joints produced by hybrid laser-arc welding and ways of assessing weld quality Examines applications of the process including magnesium alloys, aluminium and steel with specific focus on applications in the shipbuilding and automotive industries.
To further decrease the He-content or exclude it i. Part two discusses applications of the process to such metals as magnesium alloys, aluminium and steel as well as the use of hybrid laser-arc welding in such sectors as ship building and the automotive industry.