Power Presses

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Chapter 7

• Power Presses

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Stamping
One example of a product produced on a power press
http//www.advproducts.com/image/stamping/2-600.jp
g
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http//en.wikipedia.org/wiki/Progressive_stamping_
die
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Gap-Frame Presses

• Also called C-frame presses
• OBI Open-back inclinable
• OBS Open-back stationary

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Straight-Side Presses

• Typically used for higher production volumes with
  higher precision required.

http//www.toolingsystemsgroup.com/ats/images/ATS_
open.jpg
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Mechanical Vs. Hydraulic

• Mechanical
• Capacities to 6,000 tons
• Force varies throughout the stroke
• Limited/difficult overload protection

• Hydraulic
• 50,000 ton capacities
• Large force available at the top of the stroke
• Overload protection

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https//www.getransportation.com/general/locomotiv
es/specsheets.asp
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50,000 tons?
The Loewy 50,000 ton press during construction.
One of eighteen columnar plates (circa 1954).
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Rigidity
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Double Action Press
Draw Slide
Blankholder Slide
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Die Cushions(pressure pads)

• Pneumatic or Hydraulic
• Apply pressure to flat blanks for drawing
• Serve as liftout or knockout devices

http//www.daytondiecushions.com/Flash2.htm
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Other Press Types

• Hydraulic Forming
• Multiple-Slide
• Turret Punch

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Hydraulic Forming Machines and Dies

• Pressures range between 5,000 and 45,000 psi

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Multiple-Slide Forming
http//www.franklinfastener.com/images/fourslide00
4.jpg
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Turret Punches

• Punch/Laser Machine

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