About CNC Machining
Subtractive machining is undoubtedly one of the oldest methods of processing material available to man, thanks to it, humankind created some of the greatest wonders ever seen.
This ancient method is still used by industry in many contexts because it guarantees use of the final material and a degree of precision and tolerance still unattainable in most rapid prototyping machines. The list of workable materials is almost unlimited, being possible to mill plates of ABS, Ureol, POM, PA, PMMA and metals such as brass, aluminium, steel and titanium to build a single prototype or a small series.
Often the advantage of creating a single prototype by CNC machining lies in possibility of subjecting the work-piece to certification, wind tunnel and functional testing faster than the final injection moulded parts and thus of accelerating the product’s entry to the market..
In many other cases, the part produced is assembled directly on the finished product or on the production lines, especially where it is impossible to replace with new resin pieces obtained by additive manufacturing.
The costs of processing and management of individual parts still remain higher than in additive technologies for two main reasons: the necessary intervention of an operator in generating the form and machining the piece and the waste material produced, which is due to the very nature of the process of subtraction rather than addition.
In many industries, especially automotive and metalworking, CNC machining is the main production technology used because these markets needs products that are well performing under stress.
Parts made by CNC machining can undergo surface treatments such as anodizing, painting and polishing depending on the particular raw material chosen.
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