The high power multimode fiber-coupled laser sources, like solid state lasers or laser diodes as well as single mode and multimode fiber lasers, are now widely used in various industrial laser material processing technologies like metal or plastics welding, cladding, hardening, brazing, annealing. Performance of these technologies can be essentially improved by varying the irradiance profile of...

the rapid melting of a semi- infinite body due to the absorption of a cw laser beam radiation has been studied. the enthalpy technique for the solution of phase change problems has been used in an explicit finite difference form to calculate the transient temperature distribution in the semi-infinite body and the growth rate of the melt pool. the technique has been modified so that it is not ne...

Abstract The relevance of electric drives in individual mobility is continuously increasing. This requires the use new manufacturing processes automotive production. In modern stators, so-called hairpin winding used. production process entails rectangular copper conductors (hairpin) to be contacted by laser beam welding. To avoid temperature peaks due resistance heating current-carrying wire, a...

In the laser deposition of single crystal and directionally-solidified superalloys, it is desired to form laser deposits with high volume fractions of columnar grains by suppressing the columnar-to-equiaxed transition efficiently. In this paper, the influence of beam profile (circular and square shapes) and cooling conditions (natural cooling and forced cooling) on the geometric morphology and ...

The current work takes the results of numerical experiment implemented in Ansys finite element analysis program to create neural network and regression models two-beam laser splitting silicate glasses. glass cutting have been obtained DesignXplorer module Workbench using a face-centered version central composite design. processing speed, parameters beams, plate thickness, distance between radia...

AImtrm--The quality of a laser-made cut is of the utmost importance in laser processing. Any improvement in this area would be of considerable significance, in that it would lead to an elimination of post-machining operations. Currently the mechanisms governing the laser cutting process are not fully understood, partially due to the fact that laser cutting is a highly complex thermal process. I...

In the manufacturing process of electrical machines, laser cutting is widely used to produce laminations cores. The internal stresses introduced by high-energy beam will lead deterioration in magnetic properties non-oriented silicon steels. To accurately predict core losses it important analyze degree and mechanism steel sheets caused cutting. this paper, first, local 35WW250 at different posit...

Applications based on the propagation of high power laser radiation through the atmosphere are limited in range and effect, due to weather dependent beam wandering, beam deterioration, and scattering processes. Security and defense related application examples are countermeasures against hostile projectiles and the powering of satellites and aircrafts. For an examination of the correlations bet...

The main goal of this thesis is to document the design and testing of various components for use in a low cost laser cutting mechanism for hobbyists and recreational designers. Different electronics were used to assess the cutting potential of a laser diode, a small silicon chip based laser light producing unit. A test rig was constructed to evaluate the cutting potential of the laser diode, an...