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Tham khảo tài liệu 'tig book episode 5', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | V. Safety As in any welding process GTAW safety precautions are very important. All information relating to the safe operation of the welding equipment and the welding process must be fully understood before attempting to begin work. A careless welder who does not observe simple rules can cause a dangerous situation for everyone in the area. The process of arc welding creates several hazards which must be guarded against. Useful safety information can be found in the owner s manual that comes with each piece of welding equipment. Gas Tungsten Arc Welding TIG is an electrical welding process. Therefore electrical energy is required from a welding machine. If the welding machine has the characteristics of a transformer or a motor-generator design electrical energy is required as primary power to operate it. The welding machine must be installed according to the manufacturer s recommendation and in accordance with the National Electrical Code and local code requirements. Electrical Shock Welders must be concerned about the possibility of electrical shock. It should be remembered that electricity will always take the path of least resistance. If there is a proper secondary circuit the current will follow that path. However if there are poor connections bare spots on cables or wet conditions the possibility of electrical shock does exist. A welder should never weld while standing in water. If wet working conditions exist certain measures should be taken. Such measures include standing on a dry board or a dry rubber mat when welding. Likewise the welding equipment should not be placed in water. In addition gloves and shoes must be kept dry. Even a person s perspiration can lower the body s resistance to electrical shock. Fumes As with most welding processes the heat or the arc and molten pool generate fume. Since TIG does not typically use flux or produce slag it is highly recommended that the material being welded is clean. Few fumes are produced compared to other arc .
