Page 17 - MetalForming August 2011

Fig. 2
straightside, or tie-rod- constructed press may lack
the rigidity necessary to hold tight tolerances under
longer dwells and draws, causing the frame to stretch and
elongate. To prevent this, some press manufacturers employ a monoblock or honeycomb frame design. These presses are designed with low-impact speed in mind, and are intended to “box-in” horizontal and parallel support on the slide and bolster, located in the center of the frame. Thus, all support is targeted to where it’s needed most, reducing the risk of press damage, as well as floor space.
Speaking of press damage, you cannot overlook the importance of an overload- protection system. Most manufacturers offer an upgraded version of the traditional hydraulic overload, understanding
that new forces are being
entered into the forming
process, which could alter
the way a hydraulic
overload works. Other
manufacturers have done
away with the hydraulic overload and replaced it with an electronic, programmable overload, which may perform better over longer dwells operating closer to rated tonnage.
Rethinking Control
Every manufacturer gives you a means to select and adjust preprogrammed stroke profiles or create
freestyle profiles (Fig. 3). Beyond that, a
servo-press controller should offer more
Fig. 3
than what you’re used to. You should have more standard ways to integrate and orchestrate peripherals, a robust back end for collecting and analyzing data, and a user-friendly front end to put that data to use. The controller is the key to making your servo investment pay off. If you’re not using the most up-to-date and scalable control technology, you’ll soon be upgrading and paying more.
MF
Get more info at: Seyi-America, Inc. 843 Joint Park Blvd. Tullahoma, TN 37388 Tel: 931/455-7700 www.seyiamerica.com
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