Page 14 - MetalForming May 2015

Tech Update
Heavy-Metal Stamper Preps for Feature-Rich Robust Feed Line
After a recent surge in business and the purchase of an additional press, Canadi- an metalforming company Excell Stamping Inc., Kenilworth, Ontario, turned to Colt Automation for a new feed line. Company officials specified the new line for heavy-
gauge blanking. It replaces an existing cra- dle straightener that had served well past its productive life.
other parts of the plant for the firm’s sole overhead crane. Identical to a line Colt designed and installed at Excell in 2014, it features hardened side rollers in hydrauli- cally powered 1-in. outer side plates, with a 3⁄4-in. wear plate inside to help avoid material jamming. A hydraulically powered cushion roll absorbs any shock of the loading coil and helps to control the coil as it rolls into place on the 8-in.-dia. cradle rolls. And, an extendable peeler/threader blade easily peels the leading edge of the top payout coil being driven by the motorized holddown roll, and directs the material onto a pivot deflector table and dekinker.
Excell Stamping had begun to experi- ence difficult coil changeovers that required several operators as long as 30 min. to
complete. The twist to the story came when Excell asked Colt to provide a
cradle straightener unlike most traditional cradles—it wanted to stamp 25,000- lb. coils of material 0.40 in. thick by 24 in. wide from the top of the coil, while employing a nine- roll straightener. And, the width of the machine had to be stretched to accom-
Ultimately, the material enters the 6-in.- in.-dia. feed rolls and nine-roll straightener with 6-in.-dia. straightener rolls. Straight- ening and pinch rolls are of Type 52100 avi- ation-grade alloy shaft rolls, ground and chromed to RC 60/64. All transitions are machined and then cylindrically ground, pol- ished and chromed along with the roll
modate 26-in. material. In the end, Colt designed a self-loading coil-cradle ramp to hold a staged coil—no need to fight with the
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