Page 18 - MetalForming September 2016

Hydraulics Support Big Move to Bigger Parts
a result, the dies, none longer than 100 in. or weighing more than 30,000 lb., fit snugly into the beds.
“The dies just fit, we don’t have press beds three times the size of the dies,” Claucherty says, noting that this fact helps ensure precise forming with min- imal setup difficulties. “We dedicated this line to a particular product niche, and know that the line is the perfect size for automotive roof systems.”
Why go hydraulic?
“When we started looking at these new roof-system product lines, we need- ed to be able to manage the stroke speed, ram and slide velocity to deal with the yield strength of these steels and the required flow of material,” explains Claucherty, pointing out that the line runs high-strength low-alloy steel with a yield strength of 380 MPa in thicknesses between 1.2 and 3 mm. “Hydraulic presses provide that ability. For what we need to do, a hydraulic- press line was more economical than if we selected servo-driven mechanical
Blanks of high-strength low-alloy steel, produced on a mechanical press elsewhere in the plant, are manually placed for robotic pick-up and placement into the lead hydraulic press. Note the line of robots behind the safety screen to the right. Line automation has greatly assisted in keeping output high.
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16 MetalForming/September 2016
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