Machine Armor: A combination of steel
plate shielding, shade-type covers, and bellows keep contaminants from the
inner workings of a machining center.
Hot or abrasive chips and material contaminants can ruin the dimensional accuracy and bearings in a machining center's axes of motion. The "face shield" protective system from A & A Manufacturing Co. protects a CNC machining center against such damage with three types of movable covers that accommodate X, Y, and Z axis motion. These shields protect components such as ball screws, linear slides, and electrical components from friction and wear-producing contamination. They also prevent hot chips from reaching the machine structure where they could cause thermal expansion that might affect machine accuracy.
A conventional bellows or shade style cover can only move in a single plane, so a combination configuration had to be designed to allow for three-axis motion at high speeds. A & A engineers started out on the vertical axis with the company's Gordillo way cover, which is a sewn-folded accordion arrangement of stainless steel plates covering each convolution in a hypalon nylon cloth bellows. To allow for side-to-side motion of the vertical axis, PVA-coated-belting shade-roller covers are mounted on both sides of the vertical axis cover to offer protection while taking up travel. Finally a contoured-bellows ram cover made of urethane nylon at the center of the way cover handles protection during out of plane (in and out) motion of the machining spindle.
According to A & A, the face shield not only offers protection for general-purpose CNC machines, but can be of importance in niche applications such as machining optics, ceramics, graphite, magnesium, and other materials especially hazardous to bearings.
The first Tacoma Narrows Bridge was a Washington State suspension bridge that opened in 1940 and spanned the Tacoma Narrows strait of Puget Sound between Tacoma and the Kitsap Peninsula. It opened to traffic on July 1, 1940, and dramatically collapsed into Puget Sound on November 7, just four months after it opened.
Noting that we now live in an era of “confusion and ill-conceived stuff,” Ammunition design studio founder Robert Brunner, speaking at Gigaom Roadmap, said that by adding connectivity to everything and its mother, we aren't necessarily doing ourselves any favors, with many ‘things’ just fine in their unconnected state.
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