• HVC
  • High Velocity Compaction
  • HVC Benefits
  • HVC Quality
  • HVC Machine Specs
• HVR
  • High Velocity
    Re-strike
  • HVR Benefits
  • HVR Case Study
  • HVR Machine Specs
• HVCU
  • High Velocity
    Cutoff
  • How HVCU Works
  • HVCU Quality
  • HVCU Machine Specs
• HVICF
  • HVI Cold Forming
• Result Press
  • Result Press
  • Benefits
  • Machine Specs

HVCU: How it works

Our turn-key cutoff press systems include all of the components needed to handle, straighten, cut, and discharge quality blanks or billets from bar or coil. ; however, the essential components include a set of closed dies (one stationary and one moveable), a ram, and a source of controlled kinetic energy sufficient to drive the ram into the moveable die and separate the metal through adiabatic softening. This mechanism is common to all forms of high velocity impact cut off.

One Cycle, One Cut:

STEP 1:    Energy is released	STEP 2:    Energy is transferred	STEP 3:    Mechanism is reset
The ram starts the impact sequence when a precisely measured length of wire or bar is fed into the cut position.	Impact energy is transferred to the moveable die and adiabatic softening occurs in the metal between the two dies.	After the cut , the ram and tool move back to the initial position and a new length of metal is fed through the dies

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Adiabatic Softening:

Adiabatic softening is often referred to as the "adiabatic phenomenon" because of the high quality of the cuts at extreme production rates. In just milliseconds, energy is concentrated and confined to the exceptionally narrow plane between the two dies. In this plane, known as the "adiabatic zone", energy is converted into heat faster than the material being cut can dissipate it. This heat creates controlled plastic deformation and separates the material so quickly that strain hardening is confined to a depth of less than 0.04 mm.

In a high velocity impact press, the speed at which the moveable die travels can vary and should be set according to the cross section and hardness of the material being cut. If the energy is insufficient to create adiabatic shearing, the cut will not be completed or the cut will be rough. If the energy is excessive (not sufficiently controlled), it can transfer into the tooling and surrounding equipment and can damage both.