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Manufacturing Processes:
Importance of Manufacturing: The importance of manufacturing is that a gives usable product from the ore of different metals and from different material which cannot be used in their present condition.
2.Economic Definition : Manufacturing increase the value of product.
3.Technological Definition : Manufacturing is a process which gives required strength, shape and size of the product.
4.Survey of Manufacturing : A usable product is manufactured in the following sequence.
Ore from Earth → Reducing processes → Molten metal → Commercial Castings → Ingots → Further Processes → Usable product of different shapes and sizes.
All these further processes used for changing the ingots into usable products can be classified as follows :
1. Primary Shaping Processes 2.Machining Processes
3..Joining Processes 4.Surface Finishing Processes
5.Processes effecting change in properties
THE WELDING ARC The heat that is developed at the cathode and anode of an arc discharge is able to melt most of the metals and alloys. Hence, the arc is used as an intense heat
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