Page 35 - MetalForming August 2017
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                needed greater width capability on our feedlines.”
Reliable straightening also was a needed feature.
“To us,” says Reinhart, “setting up the die is the easy part. The hard part is the back end, keeping the material straight in order to correctly feed into the tool.
“With state-of-the art coil feeding,” he continues, “everything is pro- grammed. We don’t have to keep adjusting to make sure that the material is flat and straight and coming through the tool properly. This helps with our setup times, important for a job shop. Again, to me the key to proper setup is the back end—getting the material to the tool.”
To handle wider and increasingly tougher materials, MT&M has opted for 48-in.-width capacity on the beefed up coil-feed line it has ordered from Dallas for the newest 660-ton press. This line was specified to handle mild and high-strength steels. The 440-ton unit features a 42-in.-wide feed, thread- ing table, straightener, and 20,000-lb. by 42-in.-wide-capacity reel and coil car. The older 660-ton press boasts a 48-in.-wide feed, straightener, and 20,000-lb. by 48-in.-wide-capacity reel and coil car. The lines on the 440-ton and first 660-ton presses are outfitted for feeding mild and high-strength steel as well.
“These lines run a bit of everything, including prepainted material and alu- minum, and we’ll run coil as narrow as 4 in.,” says Reinhart. “Anything com- ing through our doors can run on these lines. We really like the flexibility and programmability of the coil feeds, which allow us to run these various materials and coil sizes. The program- ming features (scanning a barcode on a die triggers changes in a variety of feed-line variables specific to that die), along with using the coil cars help increase our setup speed.”
With Dallas Industries’ AutoSet, adjustable points on a feed line such as straightener rolls, edge guides, coil guides and feed passline automatically are positioned based on job recipe,
which provides quick, consistent setup for each job, according to company officials.
And, because MT&M produces a large amount of cosmetic parts, Rein- hart appreciates feed features designed to prevent material marks. Many servo- feed controls use a trapezoidal motion profile that creates quick, jerky motions that can cause slippage, material dam- age and added stress to machine com-
ponents, say Dallas officials. The com- pany’s ProfileSelect mode, conversely, uses a sinusoidal (cam-motion) profile. This reportedly results in a smooth feed motion that utilizes 100 percent of the press-feed window, reducing stress on the material and the feed’s mechanical components. Another fea- ture, Sync-Loop, synchronizes the feeder and straightener speeds to enhance a material loop’s stability and control.
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