This paper presents in detail the laser welding of a new mechatronic component belonging to the pressure sensors made by aluminum alloy AW2007. Due to very high reflectivity of aluminum alloys, fast oxidation, the absorption of gases from the surrounding medium, special difficulties arise at laser beam welding and most situations require appropriate surface pretreatment. Given these issues, the paper present an experimental study on the influence of welding parameters on the seam quality for the aluminum alloy AW2007. In addition of the study regarding the influence of welding parameters, such as, laser power, welding speed, we conducted an analysis on the influence of the initial temperature of the material on the quality of the weld. Besides these aspects the paper presents a constructive solution for a device used to optimize the laser welding process of the sensor.
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.
Given the rising prices of energy, the prospect of exhausting the hydrocarbon reserves and the harsh restrictions imposed in order to protect the environment, the problem of saving energy resources thus constitutes a major concern for mankind.According to these issues our team has designed and developed a system who generate a magnetic field used for treatment of some fuel fluids, aiming to raise the combustion efficiency and decreasing the amount of pollutants removed after combustion in large power plants.
The paper presents an experimental study that has as main objective the evaluation of the integration capacity of the spur gears obtained by FDM in high precision mechanisms. The development of precision mechanical systems required the use of the additive layer manufacturing technology in order to manufacture the gears that have specific particularities for the applications in which gears are integrated. Take these aspects into consideration, the paper presents the results achieved by testing on a ZWP-06 machine the gears obtained by fused deposition modeling technology. Gears were obtained on an Anet A2, semiprofessional 3D printer. To obtain a superior quality of toothed wheels, both process parameters: the material properties, and the features of the 3D printer were taken into account. The results, obtained from the test, revealed the level of influence of the execution parameters of the toothed wheels by FDM on their quality. The correlation of the process parameters remains the most important aspect for obtaining components with a high accuracy class, which complies with the resistance standards under the conditions of a shorter execution time.
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