| DeKalb, IL, November 1,
2001 -- Manufacturers who produce cut-off blanks from
coil, bar or tubing, can significantly improve their efficiency
and quality consistency, as well as receiving dramatic
savings being achieved in tooling life, material waste
energy costs, time and labor. LMC Inc. of DeKalb, IL has
introduced an advanced manufacturing High Velocity Impact
Technology integrated into their highly efficient press
system for the manufacturing of precision blanks and near-net-shape
components. This technology is Adiabatic Softening.
When metals are plastically strained, heat is generated.
Depending on tool configuration and strain rate, heat
generation and intensity will vary. In conventional
cropping, blanking and forming (low tool speed), heat
is conducted away at about the same rate as it is generated.
As a result, the metal will strainharden at the same
rate it is plastically deformed, thereby producing a
blank which will be distorted, and/or workhardened,
and provide angular variations, crack formations, burrs
and a loss of material.
Fracture or forming time can be reduced by increasing
the strain rate (high tool speed) and limiting tool
engagement. When the metal no longer can conduct heat
away at the rate it is generated, there will be a temperature
increase in the plastically strained zone. The metal
softens and for most metals there will be a temperature
increase which will result in local melting (maximum
softening) and will completely eliminate strainhardening.
This phenomenon is Adiabatic Softening.
LMC has successfully developed this technology and
has patented this process and tooling. The LMC Adiabatic
Press System will dramatically increase quality consistency,
increase production speeds, allow for the reduction
of floor space and allow for reduced maintenance. The
Presses are designed to maximize energy levels, production
rates and flexibility. The mechanical system meets all
the conditions for Adiabatic Softening in most metals
to include low and high carbon steels, stainless, brass,
copper, titanium aluminum and more. Regardless of the
metal, the process works the same. This technology will
eliminate the drawbacks of the conventional methods
in the production of metal blanks.
The LMC presses provide cut-off blanks produced automatically
from either coil, bar stock or tubing with cut-off or
fracture times less than a millisecond. This results
in a fracture zone only a few thousandths of an inch
wide, producing blanks ready for forming or machining.
Length variations of less than +/- .001" will be maintained
regardless of overall length. Manufactures have eliminated
post production inspection. CPK results can be expected
to significantly improve. The process also allows for
the elimination of secondary machining such as end grinding.
Unique to this technology is that there is theoretically
no limit to the size of metal rod that can be cut.
Today, LMC is offering this technology to manufacturers
throughout the world in two ways: (1) Press Systems
-- a turnkey system for impact cutting, including secondary
equipment such as barfeeders, straighteners, coilhandling
and pointers, and (2) a Cut Off Service -- LMC will
use their production facilities and provide manufacturers
with blanks of any shape from standard bar stock, coil,
extrusions, tubing, etc. to their specifications.
The Company has been providing the LMC Adiabatic Process
Manufacturing Technology to manufacturers throughout
the world since 1980 from its manufacturing facility
west of Chicago.