Page 26 - MetalForming June 2019
P. 26

You bet! Tool technology enables a variety of actions once thought viable only in stamping presses or press brakes, or as secondary operations.
Imagine a game show with various pieces of equipment on stage: a stamping press, press brake, numer- ous single-operation machines and a CNC punching machine. The show’s premise: Given a part feature, decide which piece of equipment can do the job. The host shouts out a feature:
“90-deg. bend and beyond!”
“Well, Bob, for the right workpiece shape and size, part volume and feature height, a CNC punching machine can do that!” you answer.
“You are correct! Now show me hinges!”
“I can with a CNC punching machine, Bob!”
“Threaded holes in thin material!” “Ditto, Bob!”
It’s bedlam, and before you know
it, you’re in the bonus round. In fact, CNC punching machines, with
the right tooling,
can perform a variety of
operations traditionally con-
sidered as press or press-brake work, or performed as secondary work in standalone stations. To explore such operations, MetalForming talked to Susan Erler, product manager of punching at Wilson Tool International (, a provider of tooling technology for fabricating equipment.
90-Deg. Bends and Beyond
Typically, 90-deg. bends bring to mind press brakes. But, according to Erler, many manufacturers don’t realize that they can execute these bends in a punching machine. Achieving 90-deg.
CNC punching tools can bend to 90 deg. in heights to 1 in., and even overbend to combat spring- back.
in this man-
ner eliminates
costly and time-consuming secondary operations as well as associated mate- rial handling and transport. In addition, with the right tool, bends can achieve heights to 1 in., with overbends possi- ble in order to combat springback.
“For example, Wilson Tool’s Opti- Bend tool employs a rotating cam built into the lower unit of the die,” Erler explains, “with the machine stroke
MetalForming/June 2019

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