Content tagged with "roll"
Results: 15
Article
January 9, 2007
Meeting the Standard
Figure 1 Plug-and-play electrics help simplify installation of a roll forming line and allow you to relocate the equipment easily when needed. As a young boy in 1965 I visited a car dealership with my father. I was amazed by some of the incredible innovations that had been added to... Read more...
Article
September 14, 2004
Survival of the fastest
Because metal fabricators and OEMs have increasingly strict requirements, many suppliers of sheets and blanks must provide high-quality metal stock in terms of flatness, finish, and dimensional accuracy. Competition for every bid is tight, making it easy to take the quality for granted.... Read more...
Article
October 9, 2003
Using finite element analysis to roll-form tubes
Figure 1 Roll forming causes yield stress, flow stress, and hardness variations in material properties around a tube's circumference. These variations may lead to premature bursting or excessive thinning in hydroformed parts. This makes it necessary to determine the effect roll forming... Read more...
Article
August 28, 2003
Measuring tube as it grows and shrinks
We always have some confusion at our house concerning desserts. My wife claims that I like only two kinds of pie: hot and cold. Well, she is mostly right. My favorite is cherry, and I love it served either hot or cold. Here's our family recipe—you be the judge.
Grandma's Cherry Pie... Read more...
Article
August 28, 2003
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
May 29, 2003
Roll form tooling tryout and troubleshooting
The secret to developing successful roll tooling—whether for tube production or roll forming—and achieving maximum roll integrity is a simple but often overlooked notion: a comprehensive approach. Such an approach comprises five steps: Designing the roll tooling... Read more...
Article
May 15, 2003
Solving the mysteries of the fin pass—Part 2
First, some ground rules (assumptions) for the arrangement before we discuss some possible reasons for poor-quality seam welding and their solutions:
1. You are working with a new set of rolls and spacers. We assume that the rolls are manufactured correctly. This eliminates from the equation... Read more...
Article
April 24, 2003
Hydraulic forming takes a front seat
While designers took these limitations into account and designed the product to be forgiving at the ends of the channels, several factors over the past decade have caused the company to use roll forming less and less. The Move Toward New Technology The first change to influence the... Read more...
Article
March 27, 2003
The basics of roll form tooling design
However, you must understand and apply common practices to the design process, and couple them with a certain degree of "magic" gained from experience. For each new tooling requirement in a roll form design, take the following five steps: Develop a cross-sectional drawing.... Read more...
Article
November 29, 2001
Using existing tooling for new product applications
Figure 1: This design is typical for the last fin pass for low-carbon steel using high-frequency welding. "In turbulent times, one must be innovative or be rendered defenseless." Peter Drucker said these words when addressing the Steel Service Center Institute several years ago, and... Read more...
Article
August 16, 2001
Solving problems on the tube mill
Tube mill operators face a variety of challenges every day in their effort to produce high-quality tubing in a cost-effective and productive way. This article examines some of the typical problems producers encounter, some common causes of these problems, and some ideas for how to solve these... Read more...
Article
June 6, 2001
Protecting surface-sensitive materials in coil processing
In today's world of metal fabricating, reducing the number of steps in the production process is an ever-increasing trend. Fabricators are becoming more efficient by: Feeding production lines with materials that have been slit to the proper finished dimension. Feeding production lines with... Read more...
Article
May 30, 2001
Article
May 15, 2001
Mill coolant system design
Coolants are used to wash away oils, oxides, slivers, and dirt generated during the forming, welding, and sizing of tubes and roll-formed profiles. These coolants are a mixture of water and refined chemicals that help cleanse the process, protect part finish, extend tool life, and inhibit rust... Read more...
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