Welding practice

목차 (Table of Contents)

• CONTENTS
• 1. Underpinning information = 1
• Arc welding safety = 1
• Welding terminology = 5
• Weld symbols(BS499 part 2 1980) = 10
• Types of joints = 13
• Features of a welded joint = 14
• Distortion control = 16
• Weld defects = 19
• Inspection = 19
• Welding procedure and welder qualifications = 26
• 2. Manual metal arc welding = 29
• Manual metal arc welding equipment = 29
• Striking the arc = 31
• Stop／starts = 32
• Electrode angles = 32
• Weaving = 34
• Electrode classification = 35
• Electrode size and current capacity = 35
• Electrode coatings = 37
• Welding positions for plates = 37
• Positional welding = 38
• Plate positions = 38
• Summary = 45
• 3. Metal arc gas-shielded welding = 47
• MAGS welding process = 47
• Choice of shielding gas = 48
• Electrode wires = 48
• Wire feed system = 49
• Metal transfer modes = 50
• The self-adjusting arc = 52
• Contact tip, nozzle settings = 52
• Electrode extension = 52
• Burn back = 52
• Current and voltage settings = 53
• British Standards for wires and fillers = 53
• Features of the process = 53
• Weaving = 53
• Flux-cored arc welding = 54
• Self-shielded flux-cored arc welding = 55
• Gas-shielded flux-cored arc welding = 56
• MAGS positional welding = 56
• 4. Tungsten arc gas-shielded welding = 61
• TAGS welding equipment = 61
• Equipment selection = 61
• Surge injector = 63
• DC suppressor = 63
• Contactor = 63
• Arc striking = 63
• Electrode types and diameters = 65
• Gas nozzles = 66
• Gas lens = 66
• Torches = 67
• Shielding gas = 67
• AC／DC non-consumable electrode arcs = 67
• 5. Oxyacetylene welding and cutting = 77
• Standard welding／cutting equipment = 77
• Safety precautions to be observed when using oxygen and acetylene cylinders = 77
• Regulators = 79
• Safety = 79
• Flashback arrestors = 80
• Hoses(BS5120) = 80
• Purging = 81
• Hose connectors = 81
• Hose check valves = 81
• 'O' clips = 81
• Welding torches = 82
• Nozzles = 82
• Equipment assembly(welding and cutting) = 83
• Lighting-up procedure = 84
• Flame settings = 84
• Extinguishing the flame = 85
• Welding techniques = 85
• High - and low - pressure systems = 85
• Filter glasses = 86
• Plate edge preparation = 86
• Oxyacetylene positional welding = 86
• Bronze welding = 91
• Fluxes = 91
• Oxyfuel gas cutting = 91
• Torches = 92
• Fuel gases = 92
• Nozzles = 92
• Hand cutting = 93
• Quality of cut = 95
• Supporting materials = 96
• Cutting techniques = 96
• 6. Questions = 99
• Health and safety = 99
• MMA welding = 99
• MAGS welding = 100
• TAGS welding = 101
• Gas welding and cutting = 102
• Answers to questions = 104
• Appendix 1 : Welding processes = 107
• Welding processes and their numerical representation = 107
• Appendix 2 : Useful information = 109
• Index = 113