. a simple concept that uses mass and tool speed to produce high tonnage.
The WinSet Electromagnetic Punch Press (impact press) consists of one or more patented magnetic accelerators that are connected, via push rods, to the movable tool holder plate on a precision dieset. The patented microprocessor control precisely energizes the accelerators causing the tooling to be rapidly accelerated toward the die holding base plate.
The control, by adjusting the energy "on time", regulates the tool speed, disconnecting the driving forces just before the tool impacts the work. The kinetic energy or momentum of the moving tool holder is converted to work as the tooling impacts the material being processed.
Finally, any unused energy is absorbed by the urethane stops and the tool plate is returned, aided by spring force, to the initial position.
Want to Know Tonnage?
How do we translate the energy output of high-velocity impact presses into tonnage and energy ratings found on mechanical presses?
Use the basic energy statement:
ENERGY = FORCE x DISTANCE
So, tonnage for a 0.3-inch-ton impact press is 9.4 tons for 0.032-inch material and 30 tons for 0.010-inch material.
An impact press weighing 100 pounds and using only one moving part, can outperform a 10-ton mechanical press when the material is less than 0.020 inch thick.
Shear Strength
|
Shear Strength Estimates
|
Material type
|
Estimated shear strength
|
| Rubber, Teflon, cloth, green state ceramics |
5,000 psi |
| HDPE, polypropylene, PVC, Rigid PVC, Nylon, polyethylene, polyurethane |
10,000 psi |
| Soft aluminum, FR-4, G-10, fibreglass, Kapton, Mylar |
18-25 kpsi |
| Soft brass, soft copper, bronze, phosphor bronze |
40-80 kpsi |
| Soft steel, cold rolled steel (1015 & 1041), silicon steel, full-hard brass,
full-hard copper, full-hard bronze, hard aluminum (anodized and alloys) |
60-80 kpsi |
| Hard steel, soft stainless steel |
80-100 kpsi |
| Hard stainless steel, Inconel, Titanium |
100-150 kpsi |
| High-chrome steel, hot rolled steel, nickel alloys, Hasteloy X, hardened
Inconel |
110-150 kpsi |
Calculations: Tonnage vs. Energy
Tonnage = (shear strength x thickness x linear cut) ÷ 2,000
Energy (inch tons) = Tonnage x Thickness
Inch Tons x 1.5 (safety factor) = Estimated energy requirements (See capacities below)
Estimated Capacities
| Model LS01P
|
up to 0.3 inch tons max |
| Model LS02P |
up to 0.6 inch tons max |
| Model LS03P |
up to 0.9 inch tons max |
Note 1:
Upper tool weight, including die shoe, tool holder, punches, stripper plate and stripper spring
force, affect the energy requirements and must be compensated for in our calculations. As an allowance for these items, multiply the total energy calculation (inch tons) by 1.5, providing a 50% safety factor. The result (total number of inch tons) must be below the maximum inch- ton rating shown in Estimated Capacities for the press model being considered.
