Provide a summary of underwater welding, including comparisons between its two types (wet and dry).
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- Welding is a common method to join separate parts of metal together. Briefly describe the conditions that are required for materials used in Welding.Discuss the Quality of flame required to do gas welding and give any four advantages of gas welding.(b) A resistance welding is performed to join two 2-mm thick stainless steel sheets with ten 6-mm diameter spot welds produced concurrently. The resulted weld nugget each has average 3 mm in thickness. Calculate the required welding current and energy consumption for the welding if ten seconds are needed for the whole welding operation. Given that the applied voltage is 10 V. Provide 00 TWO important assumptions in your calculation.
- Explain the mechanism of heat generation in Resistance spot welding. Explain the Force (current) vs time diagram.Explain how heat treatment is applied in welding processes and what its importance is.A circular electrode of 190 mm diameter is used for carrying out seam welding at 5 welds per cm on a mild steel tube of thickness 1.5 mm. The duration of the welding cycle is given as On - 4 cycles, Off- 3 cycles. The power supply is at 50 Hz. Calculate work speed, welds per minutę, RPM, and energy requirement assuming effective resistance between an electrode as 100u ohm.
- Explain why fusion welding with non-consumable electrodes is advantageous, compared to consumable electrodes? Give 2 reasons.A resistance welding is performed to join two 2-mm thick stainless steel sheets with ten 6-mm diameter spot welds produced concurrently. The resulted weld nugget each has average 3 mm in thickness. Calculate the required welding current and energy consumption for the welding if ten seconds are needed for the whole welding operation. Given that the applied voltage is 10 V. Provide TWO important assumptions in your calculation.