• High speed battery punching systems

    Designed to match your requirements
4-Point Connection System.

  • The 4 point connection system refers to the number of places we “push” on the part of the press that opens and closes the dies.
  • The other presses used in the battery industry use a 2 point or 1 point press.
  • The reason a 4 point system is important is because it minimizes the tipping of the die. It keeps the dies parallel.
  • d. A simple comparison I use is this:
    • 4-point = car with 4 wheels (very stable)
    • 2-point = bicycle (stable in one direction, but tippy left to right)
    • 1-point = unicycle (not stable at all)
  • Why is this important??
    • Battery Grid dies put an unbalanced load on the press when the dies close.
      • It is not unusual to see 2 tons (4,000 lbs) difference in load from the front of the die to the back of the die. With a 2-point or 1 point system this unbalanced load is applied directly to the die. It will cause the die to wear out faster.
  • OAK presses were designed specifically for applications with highly unbalanced loads.
  • Ref files- CP-1400 Press Animation, 4-point drive, tipping and shifting, tonnage screen.

Zero Clearance Slide Guidance
  • The Zero Clearance slide guidance refers to the “bearings” we use to keep the press slide from shifting laterally.
  • OAK uses a roller bearing assembly that is installed with zero clearance.
  • These bearing eliminate any movement in the X or Y direction.
  • The other presses in the battery industry use conventional “gib” bearings.
    • This is nothing more than 2 bronze plates with oil forced in between them.
    • Typical clearance between these plates is around +/- 0.15mm.
    • This allows the slide to move 0.15mm in the X and Y direction.
  • e. Why is this important?
    • We are punching lead for these applications.
    • Lead is very soft, so it wants to bend before it wants to break or cut.
    • Because of this we design our dies with very close tolerances between the male and female portions of the die. (0.05mm clearance)
    • If the press allows the slide to move +/- 0.15mm in the X and Y direction then the tooling will rub and wear out faster.
    • Ref. files- tipping and shifting, CP-1400 animation, zero clearance guides

Other Benefits from Oak Press

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Counter Rotating Press Drive

  • When you run at high speeds presses create a lot of lateral inertia due to the rotating elements of the press.
  • If these rotational forces are not balanced the press will tend to rock back and forth.
  • This movement can cause components to wear out faster and make it harder to control the punching process.
  • The OAK presses use 2 shafts that rotate in opposite directions. This counter rotating system eliminates this lateral inertia, making the press very stable.
  • Other presses in the battery industry have a single shaft, so there is no lateral inertia compensation.
  • Ref files – CP-1400 Animation

Heavy Duty Castings

  • Stamping is a pretty violent process. These is a lot of vibration created each cycle of the press.
  • Most (if not all) mechanical failures on presses are directly linked to vibration.
  • OAK presses use heavy duty cast iron frames for all our presses.
  • Some other press manufacturers use welded steel frames on their presses.
  • Cast Iron dampens vibration 20 times better than steel.
  • Ref files – castings.

Hydraulic Withdrawal System

  • OAK Presses offer a hydraulic withdrawal system on our presses.
  • This allows the operator to open up the dies so they can easily work on the dies or clean the dies without having to remove them from the press.
  • Most other presses do not offer this feature.
  • Ref files – hydraulic withdrawal

504 Wade Street, Sturgis, Michigan 49091

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