The welding of shear stud connectors to structural steel in construction requires a prolonged stooped posture that exposes ironworkers to biomechanical and welding fume hazards. In this study, biomechanical and welding fume exposures during stud welding using conventional methods were compared to exposures associated with use of a prototype system that allowed participants to weld from an uprig...

Abstract The joining of thick-walled components using beam-based techniques is content worldwide research and development activities, but has not yet been established in industry. State the art to weld nickel super alloys currently a TIG narrow-gap welding. present paper focusing on new specific laser beam welding process, so-called Laser Multi-Pass Narrow-Gap (Laser-MPNG). It first explains pr...

The application of laser ultrasonic technique is developed for evaluation of friction stir spot welding (FSSW) quality. The features of laser-generated ultrasonic waves in good welding and incomplete fusion area are simulated by finite element method (FEM). The non-contact laser ultrasonic inspection system (LUIS) was established to verify the numerical results. The interaction of laser ultraso...

Laser welding has been increasingly utilized to manufacture a variety of components thanks to its high quality and speed. For components with complex shapes, the welding position needs be continuously adjusted during laser welding, which makes it necessary to know the effects of the welding position on the quality of the laser welds. In this paper, the weld quality under two (flat and horizonta...

The actual market volume of high-power lasers for manufacturing is dominated by diffusion cooled CO2 laser systems at the multi-kW range and lamp pumped Nd:YAG laser systems at the kW range. Substituting the lamps by diodes the Nd:YAG laser in rod design entered the market as diode pumped solid state laser of the first generation. With output powers up to 6 kW the diode pumped rod is used in in...

A current trend in the automotive industry is the application of joining techniques that contribute to lighter car bodies with higher stiffness, increasing at the same time the efficiency of the manufacturing process. An emerging technology is remote laser welding (RLW). It joins metal sheets by a laser beam, projected from a scanner mounted on an industrial robot. This enables contactless weld...

Aluminium alloys are widely used in many industries due to their high strength-to-weight ratios and resistance corrosion. Due specific thermophysical properties intricate physical metallurgy, these challenging weld. Work-hardened may experience strength loss heat-affected zones (HAZ). The of precipitation-hardened is severely damaged both HAZ weld metal coarsening or full dissolution. thermal c...

In order to obtain a good result in the laser welding process, the laser welding technology for manufacturing an automobile body is studied in this research. The robot, the seam tracking system, and CW Nd:YAG laser are used for the laser welding robot system. Especially, the development of the laser-stripe sensor is highlighted. The laser-stripe sensor can measure the profile of the welding obj...