Content tagged with "mandrels"
Results: 12
Article
April 1, 2010
Selecting the right mandrel and wiper
Figure 1
Introduced in the mid-1980s, inserted (or standard) tooling can withstand the pressure associated with many bending applications. Replacing the insert, the bronze-colored portion at left, is less expensive than replacing the entire tool.
Whether the times are lean or fat,... Read more...
Article
March 1, 2010
Supply chain collaborates on bending project
Figure 1
The complexity of the finished product stems, in part, from making bends on both the H plane (hard way) and E plane (easy way).
Fabrication projects don't just happen on their own; they require planning, which often involves an OEM, a fabricator, a tooling provider, and a... Read more...
Article
September 1, 2009
Shaping profits with a mandrel extractor
Bending a tube and preventing it from collapsing is a mystery to most folks, especially those whose livelihood does not involve bending tubes. For those who bend tubing for a living, knowing how to decrease ovality in the bend region can be of interest. Before discussing strategies for... Read more...
Article
April 1, 2009
Bending rolled steel sections
Bending tube or pipe successfully is a matter of managing a handful of processes and variables. For example, the bending process causes thickening where the metal is under compression and thinning where it is under tension. Too much thickening can result in wrinkles; too much thinning results... Read more...
Article
May 13, 2008
Custom or standard?
Contrary to a popular misconception, the output of durable goods in the U.S. has been on an upward trend for decades. This growth is interrupted by intermittent, short-term slowdowns, of course, but the fact is that the U.S. continues to be a productive nation, and its output continues to... Read more...
Article
November 8, 2005
Tube-bend tooling: square-back wiper dies or wiper inserts?
Wiper dies are a fundamental requirement in modern tube bending applications in which tubes are bent at increasingly tight bend radii with increasingly thinner wall thicknesses. The design of the wiper die plays a key role in its performance and durability, as does its manufacturing... Read more...
Article
September 14, 2004
Lean times call for mean tactics—Part 1
Personally witnessing the growth and maturing of the tube bending industry for the last five decades has been a great privilege, and as one of the remaining warhorses of this industry, I am in a position to take a long look back at this peculiar fraternity that we belong to. It... Read more...
Article
September 25, 2003
Pour me a mandrel
A low-melting-point alloy is heated and poured into a length of tube. To reduce weight and cost for all types of products, design engineers often specify tubes and pipes with thinner walls instead of the previously used heavier-walled tubes and pipes. Shorter tube or pipe lengths also... Read more...
Article
August 28, 2003
Minimizing wall thickness variation in seamless tubing
Reducing the amount of variation, or achieving more wall thickness consistency, can be the difference between meeting a customer's requirements or not. It also helps to reduce or even may eliminate the customer's need for subsequent processes such as machining. Seamless tube typically is... Read more...
Article
August 28, 2003
Designing an off-road sport truck
They're big. They're mean. They growl and snarl. Untamed beasts, they're at home anywhere, regardless of the terrain or the climate. They prowl over mountains or deserts or backwoods trails, whether the conditions are warm or cold or wet or dry. They're custom-made off-road trucks, and... Read more...
Article
August 14, 2003
Notching tube and pipe
The Hole Saw Using a hole saw is an inexpensive way to make the occasional notch for a weld joint. More for the hobbyist, hole saws can be used with a drill press or, for portability, with a hand-held drill. Multiple corresponding hole saws must be used to make notches with... Read more...
Article
January 31, 2002
Using mandrels for bending tube
Tube bending applications range from very simple to very complex. Many of the more complex bends require that the tube be supported by an internal mandrel. A mandrel's purpose is to keep the tube from collapsing and wrinkling during the bending process.
An ideal bend doesn't require a... Read more...
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