PPT-Welding Processes

A Brief History of Welding Late 19 th Century Scientistsengineers apply advances in electricity to heat andor join metals Le Chatelier Joule etc Early 20 th Century Prior to WWI welding was not trusted as a method to join two metals due to crack issues. ld in g br ic at io ols Welding Fabrication Tools Volta Belting Technology has been manufacturing conveyor belting for over 40 years The knowledge gained in those years of experience has gone into the design and assembly of every Volta belting too Welding. Welding processes are conveniently divided into two classes: . fusion welding and solid state welding. . . During fusion welding a portion of the base materials to be joined is melted and mixed, often with the addition of a filler metal, forming a solid joint after subsequent solidification. . INTRODUCTION.  . Robot Welding . is a process of joining different materials. . The . large bulk of materials that are welded are metals and their alloys although welding is also applied to the joining of other materials such as thermoplastics. History of Welding. Welding was used in the construction of the iron pillar in Delhi India, erected about 310 AD and weighing 5.4 metric tons. . History of welding. Welding, was transformed during the 19th century. In 1802, Russian scientist Vasily Petrov discovered the electric arc and subsequently proposed its possible practical applications, including welding.. SOURCE. www.agednet.com. AE240 Arc Welding Safety. Heat for arc welding is obtained by electricity. Electric current flows from a transformer connected to lines from a power plant. Other sources for electricity for welding are electric motors and gas engines driving special generators. . Welding Metallurgy. Study of Welding Metallurgy is important because the overall-mechanical properties of a . weldments . are . determined . by the properties of individual microstructure present in the weld deposit and the weld heat . Background. Thermosetting and thermoplastic polymers are two kinds . of matrix . for . fibre reinforced polymer (FRP) . composites. Compared with thermosetting . composites (TSC), thermoplastic composites (TPC) are . Tig and Mig welding. By: Luke Woroniecki. Table of Contents. Welding Certification and Qualification. Codes. Safety. Cutting Processes. Welding Processes. Weld Joint Geometry and Welding Symbols. Welding Metallurgy. nature OF WORK. - Welders. , cutters, . solderers. , and . brazers. held about 337,300 jobs in . 2010. -Welders will either work outdoors or in a confined space to contain sparks.. - They wear safety shoes, goggles, masks with protective lenses, and other equipment to protect from burns and falling objects. . T-joint. T-joint welded using arc welding. T-joint welded using . tig. T-joint welded using . mig. Lap joint. Lap joint welded using . tig. Lap joint welded using arc welding. Lap joint welded using . Joining and Assembly. Joining . - . welding. , . brazing. , . soldering. , and adhesive bonding. These processes form a permanent joint between parts. Assembly - mechanical methods (usually) of fastening parts together. A Brief History of Welding. Late 19. th. Century. Scientists/engineers apply advances in electricity to heat and/or join metals (Le Chatelier, Joule, etc.). Early 20. th. Century. Prior to WWI welding was not trusted as a method to join two metals due to crack issues. AKA “Arc Welding. Officially known as: SMAW – “Shielded Metal Arc Welding . “Stick Welding”, AKA “Arc Welding. Officially known as: SMAW – “Shielded Metal Arc Welding . “Stick Welding”, AKA “Arc Welding. MALUTI TVET COLLEGE. LECTURER : MJ MOTAUNG. . . TOPIC :5 UNIT :1. . . GAS TUNGSTEN ARC WELDING. LO :. Explain the terminologies associated with gas tungsten arc welding procedure..