Final answer :
Pre Machining involves removing some extended micro rough areas from the workpiece that are undesirable for advanced manufacturing processes.
<h3>
What is pre-machining? What three different machining processes are there?</h3>
Roughing operations are used to quickly remove huge amounts of material and create parts with geometry that closely resembles the desired shape. Following roughing, a finishing procedure is utilised to get the desired final geometry and surface finish.
Turning, drilling, and milling are the three main machining operations. Shape-changing, planing, drilling, broaching, and sawing are additional processes that fall under the umbrella term "other operations."
Explanation :
Because of its superior surface smoothness and low dimensional inaccuracy, pre-machining is essentially beneficial and desirable for any advanced manufacturing processes.
For instance:
If pre-shaping is not done in EDM (Electric discharge machining), there may be chances of arcing in the material removal zone. Hence that results in inaccurately measured dimensions.
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