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Tham khảo tài liệu 'tig book episode 7', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | VII. Joint Design and Types of Welds A weld joint is the term used for the location where two or more pieces of metal will be or have been welded together. Figure 7.1 shows the five basic weld joint designs. To obtain a quality weld and cost-effective use of filler metal joint design must be considered in any type of weldment. This will depend upon several factors including material type thickness joint configuration and strength required. It is quite possible that a welder would have little to do with how a particular joint is designed. However a good welder should be familiar enough with joint design to carry out a welding job. A proper joint design will provide the required strength and the highest quality weld at the most economical cost. The joint design selected will dictate what type of weld is required. Figure 7.1 Five basic joint designs. A few considerations for joint design are specific to GTAW. Naturally the weld joint must be accessible to the GTAW torch making it possible for proper torch movements. Weld joints should not be too narrow so as to restrict access of the gas cup. In some cases using a narrower gas cup or a gas lens with the electrode extending up to an inch beyond the gas cup will help. Edge Joints Edge joints are often used when the members to be welded will not be subjected to great stresses. Edge joints are not recommended where impact or great stress may occur to one or both of the welded members. An edge joint occurs when the edges of parallel or nearly parallel members meet and are joined by a weld. Figure 7.2 shows different types of edge joints. Figure 7.2 demonstrates the various types of edges that can be applied to the joints. If required the joints can be altered by grinding cutting or machining the edges into a groove. The groove can be a square beveled V J or U. The main purpose of the groove is to allow proper penetration or depth of fusion. See Figure 7.3. The five basic joint designs are typically welded with the TIG .