Skyline had been experiencing issues with its current straightener, affecting the company's productivity. Recognizing the need for a more reliable system, Skyline turned to COE Press Equipment, known for the robust design of its SESCO Products Group machines. COE personnel analyzed Skyline's application and operation, considering the material width of 48" and the material thickness range, which varies from 0.170" with a 65,000 PSI yield strength to the extremely demanding 0.535" with a 55,000 PSI yield strength. Additionally, it considered the desired payoff rate of 70 fpm.
Whereas Skyline's original straightener was using 3.5" – 4.0" diameter straightening rolls, COE's design employs 8" diameter rolls. The (7) straightening rolls are configured in a 3 over 4 arrangement. All rolls are backed up to prevent deflection while straightening heavy gauge and high strength steels. Additionally, the straightener has 10" pinch rolls that are also backed up to maintain rigidity across the roll face when performing "pull-off" operations of extreme coil weights. A 150 HP AC variable speed drive package delivers the horsepower and torque required to effectively straighten the .525" thick steel.
The new COE-SESCO power straightener is designed with many enhanced features over conventional straighteners for effective reliability and maintainability. The extreme force required to effectively straighten these thick materials is transmitted by SESCO's unique "eccenter" cam arrangement and heavy-duty hydraulic motors. The COE-SESCO straightener has helped to eliminate much of the downtime the plant had been experiencing, helping Skyline improve reliability and increase productivity.