Laser welding has been increasingly adopted into the automotive sector due to its competitive processing speed, less restrictive single-sided access requirements and improved process flexibility. These benefits notwithstanding, laser still remains susceptible weld cracking especially for 6xxx high strength aluminium extrusions, which are widely used in industry body-in-white battery tray manufacturing. This paper reviews current challenges opportunities construction of using alloys with...

This study investigates the influence of hybrid laser-arc welding parameters on microstructure and mechanical properties weld: namely, speed preheating temperature cooling rates, hardness. In order to achieve maximum productivity, optimum for X80 steel 14 mm thickness with without was defined.

This paper addresses in-process monitoring of weld penetration depth (WPD) during remote laser welding battery tab connectors using optical coherence tomography (OCT). The research aims at studying the impact process parameters on accuracy WPD measurements. In general, highest measurement is achievable by positioning OCT measuring beam toward bottom keyhole. However, finding and maintaining alignment between keyhole a challenging task because dynamic changes in size shape itself. above...

Laser beam welding is becoming widely used in many industrial applications. This paper reviews recent research conducted on the performance, potential and problems of thick section butt joint laser welding. Common defects that occur with high power are discussed possible solutions proposed. Methods process efficiency improvement analyzed.

Laser welding of thick plates in production environments is one the main applications high power lasers; however, process has certain limitations. The small spot size focused beam produces welds with depth-to-width aspect ratio but at times fails to provide sufficient reinforcement because poor gap bridging ability. results shipbuilding steel AH36 thickness 8 mm as a single-sided T-joint using 10 kW fiber laser are presented and discussed this research paper. Three optical setups fibers 200...

Remote laser welding (RLW) combines the positive features of tactile with additional benefits such as increased processing speed, reduced operational cost and service, higher process flexibility. A leading challenge preventing full uptake RLW technology in industry is lack efficient closed loop in-process (CLIP) monitoring weld quality control solutions. This underpins need to fuse multiple sensor technologies data analytics predictive engineering simulations. Although development...

The aim of this paper is to evaluate methods for improving laser beam welding efficiency, namely, obtaining increased penetration depth and enhanced weld quality without an increase in power or a decrease speed. Increased efficiency can be realized with several techniques: butt joint edge surface modifications, preheating modifications ambient atmospheric conditions. process improvement are analysed compared both separately combined. Improvement speed similar was noted all the techniques studied.

Abstract The objective of this research is to investigate the performance and potential high power laser beam welding strength cold resistant low carbon quenched tempered steel F620W with use new computer aided optimization methods. was divided into three parts. First, in order identify optimal thermal cycle, dilatometric thermokinetic investigations were performed using a Bahr Thermoanalise DIL 805 dilatometer. To achieve recommended cycle during welding, process simulated LaserCAD software...

The objective of the research is to investigate and compare quality welded samples two low alloyed steels, S355 St 3 with various edge preparations in butt joint configuration. Welding was performed high power fiber lasers a wavelength 1070 nm at levels 10 14 kW. Joint surface roughness air gap between plates had significant effect on penetration depth. Optimum recommended increase provide maximum depth are presented.

If the human skin is not exposed to solar radiation (direct or scattered) for long periods of time, disturbances will occur in physiological equilibrium system. The result be functional disorders nervous system, a vitamin D deficiency, weakening body's defenses, and an aggravation chronic diseases. Sunlight deficiency observed more particularly persons living polar regions those working underground windowless industrial buildings. simplest at same time most effective measure prevention this...

Аннотация:

The paper studies the effect of butt joint edge surface preparation on welding efficiency low-alloyed steel S355 20 mm thickness. Welding was performed with a high power fiber laser wavelength 1070 nm at level 10 kW. quality machining and post-processing varied in experiments. Based results, recommendations for are presented. investigation shows that to achieve higher productivity beam joints structural steel, should be carried out an abrasive water jet cutting followed shot blasting,...

The results of forecasting the development uneven settlement buildings according to computer simulation soil foundations with various geological structure using software package «Alterra».The regularities vertical displacements and changes in stress-strain state foundation were identified.The estimated data compared real object survey monitoring.

On the base of experimental studies physical-chemical factors influence on decomposition phenolic compounds in aqueous media, it was developed photochemical reactor phenol-containing sewage oxidation. This can be introduced into a modular local treatment system that meets criteria resource sawing and environmental safety mining

Представлен анализ научных публикаций по шумозащитным укрытиям. Выполнено моделирование мобильной шумоподавляющей установки для надшахтной вентиляционной установки. Указаны основные параметры разработанных узлов и элементов металлической конструкции. Определена область внедрения запроектированной в производственных условиях. Проведены измерения шумовой нагрузки зоне действия УВЦГ-9. Разработаны рекомендации оптимизации условий труда при эксплуатации Ключевые слова: шум, вентиляционная...

Theoretical bases of determination total shear value during processing rubber compounds in extruding presses and molding channels extrusion heads are considered.A mathematical model to predict the change cross-sectional dimensions an extrudate, given degree pre-curing plasticization screw head has been developed.