CNC machining can interchangeably refer to CNC controlled mills, lathes, or drills. Complex CNC machines use multiple cutting heads and tool changers are referred to as machining centers because they may perform all three operations as independent or simultaneous operations. The benefits of CNC machining include producing parts to tight tolerances required by the operating environment, streamlining a multiple step manufacturing process, and reducing production lead-times.
Alloy, carbon, and stainless bars are the most common metals used in machining. Higher value metals such as titanium and nickel may also be machined, though the applications are more niched.
Trepanning is a “coring” operation as opposed to other methods of producing a hole. The cutting tool cuts out a channel along the circumference of the hole, allowing the inner portion of the hole to remain intact. This solid portion is extracted after the hole is completed. The end product is normally a heavy-wall tube or “hollow bar.” Trepanning is very common in the oil & gas markets.
Boring is a process that uses a single-point tool to enlarge a preexisting hole. Boring is commonly performed on a lathe but is also possible on a mill. Boring removes metal from the inside diameter which provides good, comprehensive geometry covering joviality, roundness and straightness.
A process using abrasive polishing stones, this operation removes small amounts of materials to achieve precise Ids and improve finishes. Normal stock removal is .006″ to as much .125″ depending on the bore size of the tube. Other machining processes precede honing when larger amounts of materials need to be removed.
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