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Machining Related Articles

CNC Machining: The Next Generation
Peter Zelinski

Improved information flow transforms metalworkingas well as a metalworking magazine.One generation ago about 25 years ago, that is industrial metalworking was in the midst of a transition. Where machine tool motion had traditionally been governed either mechanically or by human oversight, a great many shops at that time had begun to define this motion instead using coded programs. These programs were written for machine tool controls that awaited only the proper instructions to send their machines’ axes through any sequence of moves. One generation ago, NC machining became a mature and accepted technology...

Excimer laser machining of corner cube structures
K I Jolic, M K Ghantasala and E C Harvey

Abstract. Fabrication of corner cube structures using excimer laser projection has been a challenge for many years due to lack of a suitable machining strategy. This paper presents a new process methodology developed for this purpose, which consists of varying the projection aperture during machining by applying relative motion to two overlapping masks. The effective projection aperture is the two-dimensional area defined by the intersection of the apertures of each mask..

Evolving From Conventional CNC To Advanced Swiss Technology
DECO

Ron Hunt established Hunt Design and Manufacturing, Inc. in 1976 in Arab, Alabama, out of his carport. He had one Bridgeport milling machine. Next he purchased a CNC milling machine that allowed the company to compete with bigger shops and earn its share of aerospace and defense industry work available from nearby Huntsville in the mid-1980s. Hunt Design grew to 30 employees, more CNC machines, and larger quarters. But when the defense work fell off, Mr. Hunt knew his company was at a turning point...

Fixturing for High-Speed Machining
Gary S. Vasilash

Let's face it: no matter what kind of bearings are used in the spindle and no matter whether it is a linear motor or a highly capable ballscrew system, how parts are fixtured for high-speed production machining makes all the difference in the world when it comes to productivity. High-speed machining for production operations is generally figured to be that metal removal which is performed by a machine equipped with a spindle that's capable of spinning a tool at 25,000 rpm or more. Clearly, a driver for using equipment that can machine at this swift rate is cycle time reduction. More chips in less time..

Slashing the Costs of High-Precision Micro machining
Dr. Thomas Herrmann et al.

For precision machining applications, picosecond pulses have advantages over nanosecond and femtosecond pulses. Nanosecond pulses from Q-switched, solid-state lasers have long been used in a variety of machining applications. More precise micromachining can be accomplished with the UV pulses from excimer lasers and with femtosecond pulses from ultrafast solid-state lasers, albeit it at a higher cost. Recent experiments have shown that picosecond pulses from diode-pumped solid-state lasers are capable of precise micromachining at surprisingly lower cost than the femtosecond alternatives...

CNC Machines Versus Manual Machines - An interview with Mike Lynch
Domenico Galeotalanza

Domenico Galeotalanza: Describe the origins of your involvement with CNC machining. Comment on previous machining experience and what led you to form CNC Concepts.

Mike Lynch: When growing up, I worked in my father's machine shop, running machines to produce workpieces for the products he invented and marketed. After high school, I went to a local community college that had a great program for tool and die design and machining. I was hired by one of the night instructors to work for GTE Automatic Electric as an entry-level tool designer. Most of the work I did was related to making detail drawings for the real design engineers - and I didn't like it very much. About six months after starting with them, this company bought an NC turret punch press. Knowing I wasn't very happy with the tool design work, my manager allowed me to learn and work with the new NC machine. From GTE, I went to work for Rockwell International, which at the time, had seventeen NC machines. During my two year stay with them, I learned to program them. I first started teaching CNC...