An early pioneer in the fields of NC and CAD/CAM software, Patrick J. Hanratty, PhD, discovered his passion for computing and programming almost by accident, answering a newspaper ad seeking programmers in his hometown of San Diego after returning from service in the Air Force during the Korean War.
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Last year’s surge in medical machining and firearms manufacturing could well be joined or even eclipsed by this years’ reemergence of production for applications in the automotive, aerospace, electronics, and hydraulics industries, generating increased interest in Swiss-style machining. This isn’t news. But what may be surprising is that the venerable, tried and true Swiss automatic CNC lathe coninues to evolve, adding bells and whistles where needed, or conversely stripping one—like a guide bushing—away to maximize its efficiency in machining parts complete.
All fixtures are designed to hold a workpiece in position firmly and accurately during a manufacturing process.
Shop efficiencies start with the machine tool controller, as today’s CNC equipment offers machine operators myriad tools for improving part surface finishes, allocating machine time, and cutting job cycle times.
A self-described “river rat” during his teenage years, Herbert B. Voelcker grew up in the small town of Tonawanda, NY, just north of Buffalo, where as a young man he grew to love the water, boats, and steam engines. His early fascination with how things worked eventually led him to study mechanical engineering at the Massachusetts Institute of Technology (Cambridge, MA), and to embark later on a greatly varied technical career highlighted by his research into the mathematical foundations for 3-D solid modeling.
The machining challenges for two of the most advanced concepts in cutting tool materials are pretty well known. Cubic boron nitride (CBN) tools of varying designs are being used to cut hardened ferrous metals with or without interrupted cuts, as well as welded and clad metals.
Workholding techniques using a magnetic field, a vacuum, or an adhesive can be effective alternatives to clamps. When these techniques are used, more part area is available for the cutting tools, thin parts can be held, and initial setup can be fast and simple. Plus, there is a potential for smoother surfaces and a shorter overall production cycle.
Advanced simulation, new toolpath techniques aid programming of highly complex machinery. CAD/CAM software developers continue to refine simulation capabilities and toolpath techniques that enable programming highly complex equipment including multiaxis and multitasking machine tools.
Keeping products clean is becoming a more significant part of manufacturing as standards for cleanliness, deburring, and finish grow more stringent.
M. Eugene Merchant began his career in 1936 at the Cincinnati Milling Machine Co. (later Cincinnati Milacron), where he went to work analyzing the nature of friction between the cutting tool and the chip. The young engineer eventually developed a mathematical model of the metalcutting process that is still taught and used today.