Base Metal Preparation:
Joints used in gas welding are:
i) Butt joint
ii) lap joint
iii) Edge joint
iv) T-joint
v) Corner joint
Either fillet or groove welds are used depending on the work-piece and on strength requirement.
-Workpiece edges may be prepared by
i)gas cutting
ii)Plasma cutting
iii)Milling
iv)Shaping
v)Planning etc.
fig--
-In joint preparation it should be ensured that the plate edges are free from rust or oil.this prevents excessive fumes and helps improves the appearance of finished weld.
a strong wire brush is used to dispose of rust and small burns.The parts to be welded may be pre-set to counteract distortion.
ii) lap joint
iii) Edge joint
iv) T-joint
v) Corner joint
Either fillet or groove welds are used depending on the work-piece and on strength requirement.
-Workpiece edges may be prepared by
i)gas cutting
ii)Plasma cutting
iii)Milling
iv)Shaping
v)Planning etc.
fig--
-In joint preparation it should be ensured that the plate edges are free from rust or oil.this prevents excessive fumes and helps improves the appearance of finished weld.
a strong wire brush is used to dispose of rust and small burns.The parts to be welded may be pre-set to counteract distortion.
