December 11, 2007 | By Bill Schubert
Resistance welding differs from fusion welding in that pressure is applied to the weld until the molten area coalesces, cools, and solidifies. Two resistance welding processes commonly integrated with roll forming are high-frequency welding and rotary spot welding. High-frequency Welding From...
April 10, 2007 | By Paul Williams
When deciding whether to produce roofing panels, you need to determine your ROI, based on if you can use existing equipment or need new equipment, the required panel appearance; possible line configuration; and material handling options.
April 10, 2007 | By Hanhui Li
Several techniques are used commonly to reduce profile distortion when air bending with a roll former. These include small-radius forming, false bending, vertical side rolls, and angle side rolls.
January 9, 2007 | By Jeff Carson
Using old roll forming technology is one thing, but it's another to use or buy equipment that does not have essential features that now are considered standard. Learn which five features must be included in roll forming equipment and why they simplify manufacturing.
December 12, 2006 | By Bill Schubert
Of the many weld processes used, resistance, high frequency and fusion welding are the most likely to be integrated with roll forming. Welding processes that are integrated with roll forming include GTAW, fusion, plasma arc welding, laser welding, resistance welding, and high-frequency welding. The fusion weld processes most successfully integrated with rollforming are those that are fast and don't require a filler metal.
September 12, 2006 | By Kate Bachman
Radius Track, a fabricator specializing in its patented curved metal studs, replaced many of the heavy-gauge beams in the a church's dome frame with light-gauge steel studs. As a result, the dome was light enough to be supported without view-obstructing columns.
July 11, 2006 | By Rick Blum
For certain sheet metal applications, roll forming with spring-loaded top rolls is a practical production method. This article explains the process, describes various machine configurations, and outlines the criteria for suitable applications. It also discusses product requirements that are incompatible with this process.
May 9, 2006 | By Scott Tompson
Roll forming of roofing components for the pre-engineered building and component industries presents unique challenges for manufacturers. Tighter profile tolerances, wider product ranges, and compressed lead times present production challenges for producers running older equipment or those contemplating a move into this market. Some developments in equipment and processes that are important to producing secondary structural members include quick-change roll form tooling systems and tooling that can improve the productivity of roofing components- Cee's, Zee's, Eave Struts, Channel, and Base Angle.
December 13, 2005 | By Richard Allman
In roll forming, non-stop punching and shear systems have traditionally employed simple open-loop control methods. Closed-loop (also called servo-based) systems can overcome many limitations of the open-loop design and yield higher line speeds, reduce downtime, and reduce scrap.
December 13, 2005 | By Hanhui Li
Roll-formed parts are subject to end distortion when the parts are cut at the end of the roll-forming line. Understanding the forces that contribute to end distortion is the first step to balancing the forces and eliminating end distortion.
Understanding the relationship between the elevation of the entrance guide and the shape of the roll formed strip is crucial to satisfactory roll forming. The entance guide elevation, if improperly set, can cause the strip to bow and twist as it leaves the first forming pass. Setting the elevation properly can help to eliminate additional stress and strain at the strip edges that cause bow and twist.
January 11, 2005 | By Dan Mennecke
Roll forming, often called open-section forming, uses successive sets of roller dies to bend a strip of steel progressively until the desired shape is achieved. This process is very similar to traditional tube- and pipemaking, but differs in that it can form more complicated sections.
March 25, 2004 | By Steve Ebel
You may have found yourself saying, "I need to make an engineering change to my roll form tooling, but I don't have the roll tooling designs or drawings." When you are faced with this situation you will have to start at the beginning, basically, and reverse-engineer the complete set of roll form tooling.
September 25, 2003 | By Lincoln Brunner
Many systems enable users to download a DXF drawing directly into the roll forming line's computer.Not everyone can be the New York Yankees, or even the roll forming version—especially in today's economic climate.It would be nice, though. The Bronx Bombers have used a fat wallet and keen scouting...
September 25, 2003 | By Joe Ivaska
At first glance, it doesn't seem that the compatibility of the lubricant used in the roll forming process needs much attention. You'd better look again. It may surprise you that the chemical and physical properties of the roll forming lubricant leave fingerprints in at least six different areas of the operation.