|CNC Machining is short for computer numerically controlled
machining. It is a computer tied to a machine tool that holds varying amounts and styles
of metal cutting tools usually on a tool carousel indexing mechanism. It is an efficient
and very precise way of manufacturing quantities of quality metal widgets. This process
lends itself to lots of 25 minimum but really more because of the costs involved for
initially setting up a specific task or job. Individual items or
twosey, threesey level orders get expensive. It can take 3-5 hours to
set up a job and that cost has to get into the price in some manner.
Small lot items are better at a local prototype or manual machine shop.
The Process is as Follows :
Review item/blue print to be machined.
Design of process flow raw material to finished
Determine/design fixturing of part to be machined
Write computer program to power CNC and machine
geometry of part
Schedule CNC machine time
Order and review raw materials to be used
Pre-Process of stock raw material (if required)
Set up and offset tools, fixture and CNC machine
Test and run first part
Quality Control inspection
Run rest of parts through machining/QA in process
Part finishing (grinding, burr removal, plating if
|Depending on geometry and requirements of finished parts steps 1-10
may need to be repeated on different types of CNC machines.
requirements that would be repetitive, like 100 pieces every 3 months, the second time the
parts went through (assuming no print changes) would only require steps 5-11 to complete
Benefits of CNC Machining
Low cost of production. Once set up, the
machines will repeat very
accurately and require minimal machinist level intervention.
High part to part accuracy and
Fast, consistent thru-put of finished
goods. Once started, it really doesn't pay to stop.
With part fixturing, fast setup and rapid
shipment from order date is possible.
11/25/2005 ęCopyright HyVac Products,
Inc. All Right Reserved
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