Workshop Technology
In sheet metal blanking, shear is provided on punches and dies so that

Press load is reduced
Cut blanks is straight
Good cut edge is obtained
Warping of sheet is minimized

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Workshop Technology
Spot welding is used for welding

Lap joints in plates having thickness above 3 mm
Butt joints in plates having 0.025 mm to 1.25 mm thickness
Lap joints in plates having 0.025 mm to 1.25 mm thickness
Butt joints in plates having thickness above 3 mm

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Workshop Technology
Riddle is used for

Cleaning the moulding sand
Moistening the sand around the edge before removing pattern
Smoothing and cleaning out depressions in the mould
Reinforcement of sand in the top part of moulding box

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