Turning process (Machining process)
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Roughing, To quickly remove bulk of the waste material and give the coarse stepped feature seen.
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Semi-roughing, Using a smaller cutter than roughing, still to remove the bulk of the waste material, but should left finishing machining allowance.
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Semi-finishing, Using a relatively large ball nosed cutter, removing the steps generated in the two above procedures, to start to form the final profile of the work piece.
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finishing, The final stage, in order to machining to the requirement sizes in the drawings. A small ball nosed cutter traversing across the products surface make the finished shape and sizes. And if the product¨s accuracy is high, there is still need to some work such as polishing and grinding etc.
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