Content tagged with "hot"
Results: 16
Article
July 13, 2004
Is your bend good enough?
You recently acquired a pipe bender to enhance your fabrication capabilities, received an order, procured the pipe stock your customer requested, and bent it as specified. Your customer rejected the first lot. He called and complained about a hump on the extrados, and he said something about it... Read more...
Article
July 24, 2003
Die width selection
Most designers and engineers usually place very little importance on achieving the correct inside radius of a formed part. Why? Because the functionality of the part is unaffected if the specified inside radius is 0.062 in. and actual measured inside radius is 0.078 in. So why do we care about... Read more...
Article
July 10, 2003
Six dangerous misconceptions about crane safety
Nearly every product today has a warning label. In fact, many products have multiple warning labels, lights, and bells. We even have warnings telling us our coffee is hot! It's little wonder, then, that many of us suffer from warning overload and just ignore the warnings. Unfortunately,... Read more...
Article
July 10, 2003
Hot spots for U.S. metal fabricated exports
Canada is a virtual U.S. export paradise. It is, by far, the leading importer of U.S. exports in the categories reviewed by The FABRICATOR® staff. In some cases, Canada outspent the second-place export purchaser, Mexico, by 10 to 1. Some surprising newcomers have been added to... Read more...
Article
June 26, 2003
Phases, structures, and the influences of temperature
But phase changes can take place in many metals while still in the solid state. These phase changes are directly related to temperature and take place in the metal's crystalline structure. And while temperature is what controls these transformations, stress, cooling rate, and alloy or chemical... Read more...
Article
June 26, 2003
Tooling tricks of the trade
Just make it work!" they scream. "I don't care how Just make it work!" As a tooling professional (whether you are a tool- and diemaker, engineer, press operator, or any other member of the team responsible for operating and maintaining that die), you quickly find that "making it work" is... Read more...
Article
June 26, 2003
The Bold in Arches
Texans will remind you that things are bigger in Texas, and the Dallas Convention Center is just another example, as this computer drawing shows. Two 860-ton roof truss assemblies, fabricated from large-diameter pipe, make it possible for Dallas to boast that it currently has the largest... Read more...
Article
June 26, 2003
Making hands-free straight, saddle, and miter cuts
Since its inception in 1969, the company had used traditional, manual processes. Pipes were moved into and out of the work area by forklift, and pipe cutting was done with either a hand-powered mechanized torch or a hand-held torch. For straight end cuts, an operator attached a... Read more...
Article
June 12, 2003
Understanding weld discontinuities
A welder's primary concern in any kind of work is ensuring his weld is sound. For this reason, it's important for an inspector examining the weld to be able to spot a variety of weld discontinuities, including: Porosity. Incomplete fusion. Incomplete joint penetration. Unacceptable... Read more...
Article
June 12, 2003
What's that material?
An XRF system can be integrated at a detector station before final packaging. The tubes are held in place by a pneumatic clamp while the XRF detector is raised to make contact with the tube and perform the measurement. This process confirms the alloy grade of the material typically in two... Read more...
Article
May 29, 2003
Don't be a hot dog with heating heads
Welders use heating heads to preheat steels before welding, maintain heat between welds, heat treat after welding, and heat before straightening or bending. Heating heads can be safe every time they're lit when you use them safely. However, heating attachments probably are the most dangerous... Read more...
Article
May 29, 2003
Predicting the service life of galvanized steel
Zinc, which has been used to hot-dip-galvanize steel for 250 years, provides 50 to 75 years of corrosion protection in many environments. Empirical data collected about hot-dip galvanized (HDG) steel field performance from 1940 to 1980—in environments ranging from industrial to... Read more...
Article
May 29, 2003
Making your own punch and dies
Speaking from 30 years of experience, I'd say this situation probably is a fact of life for 99 percent of us. Whether we are doing some in-house engineering and design or working at the press brake, the thought is the same.
An End to the Dilemma
Sure enough, there is a reasonable solution... Read more...
Article
May 15, 2003
Reviving the past
When he looked at the outside of his building, Bellingham, Wash., YMCA Director Dave Harding realized he faced a challenge. The original Bellingham, Wash., YMCA building. The YMCA's main downtown facility was located in an early-1900s, four-story building. In recent years the interior... Read more...
Article
May 15, 2003
Riding on the cusp of something great
The sculptures' pieces seem only incidentally connected, barely touching, much less literally supporting and balancing each other. They appear more like glittering ornaments dangling from a mobile than weighty metal structures connected by fate and strong welds. Ironically, Robb said he... Read more...
Article
May 30, 2001
Skelp edge preparation for manufacturing ERW pipe
Achieving a quality weld requires starting with good edges. In manufacturing electric-resistance- welded (ERW) pipe and tube, this is critical. Perfect edges are almost impossible to obtain consistently by rotary side trimming single-width coils or side trimming and slitting master... Read more...
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