Application and Upgrading of On-line Monitoring System for Measurement and Processing of Electric Signals at Arc Stud Welding Process
As the application of on-line monitoring system is shown to be a good solution during monitoring of main welding parameters at different welding processes, this paper describes application and upgrade of on-line monitoring system developed at Mechanical Engineering Faculty in Slavonski Brod. Experimental part of the paper shows application of on-line monitoring system during welding of two types of studs with application of activating flux for ATIG process (VS-2E) on the base metal surface. Monitoring of main welding parameters (welding current and voltage) was conducted during welding of studs usually used in steam boiler production (stud diameter: 10 mm), and welding voltage was monitored on the studs (shear stud) of 22 mm diameters used in bridge construction. The goal of monitoring and analyse of main welding parameters is to evaluate the connection of electric arc parameters variations with the presence of activating flux.
Load capacity of perforated shear connector
Several types of economical and effective connectors are commonly used for composite steel and concrete beams at present. Perforated shear connector has been developed during last two decades and have become popular due to their advantageous properties. At the Department of Steel and Timber Structures of CTU many experiments (push-out test) were carried out with two types of connector with different openings, various strengths of concrete and amount of reinforcement. The design formulas for static shear load capacity were deduced on the basis of these experiments. Nowadays, small modification of basic connector was designed for decrease of laboriousness in situ. Results of modified connector are in good compare with previous one.
Possibilities of dynamic monitoring of the main parameters in arc welding process
U radu se obrazlaže pristup dinamickom pracenju i registraciji glavnih parametara elektrolucnog zavarivanja (napona i jakosti struje zavarivanja) pomocu on-line monitoring uređaja. Pored ostalih prednosti koje pruža primjena ovog uređaja, dinamickim pracenjem parametara zavarivanja pružase i mogucnost ocjene stabilnosti procesa zavarivanja, te mogucnost upravljanja parametrima zavarivanja.