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The standard edgeform method of tooling design is the most widely used in the tube and pipe industry. This method is used to form a wide range of material and gauges from mild steel to higher tensile (tension). Tooling made with this design is easier to set up than tooling made with the conventional design.
This design forms the smaller edgeform radius in one pass only and holds that radius throughout the breakdown side rolls. It is possible to use this design when running multiple tube and pipe sizes, however, it is not recommended. Especially on higher strength materials or tight tolerance parts with cosmetic requirements. The smallest size tube being produced should not be less than 80% of the largest size produced.
It is highly recommended when gauge thicknesses (T/D ratios) are between 3% - 8% (thickness divided by diameter). The number 1 top breakdown roll should be changed out if the gauge thicknesses are below 3% or above 8%.
Roll Form Engineering Technician
Shiroki North America
Kenney Manufacturing Company
Welded Tubes, Inc.
Minteq International, Inc.
Roll-Kraft’s latest tube and pipe mill training seminar was held on October 24, 2023 at the Waverly, Nebraska Venue location.
Mill operators, maintenance supervisors, engineers, tool room personnel and management will all benefit from the program by learning new skills & produce a better quality product in less time.
Robert's extensive expertise in the tubing industry spans over five decades, including 33 years of service at Roll-Kraft.