Madison, MS - Mi-Tech Steel has installed a
high-production close-tolerance Multi-Blanking Line in its new
Madison, MS. coil-processing facility near Jackson, MS. The line
is capable of converting 60,000# x 72" wide surface-critical
exposed automotive quality cold rolled and coated coil in gauges
from.018" through .075" into panel flat precision tolerance
blanks from 12" to 72" wide x 12" to 144" long. The
Multi-Blanking Line features a computer controlled Hydraulic
Leveler, a multi-head quick-change Turret Head™ Slitter, a
microprocessor controlled precision Servo Feed, a 100
cycle-minute Hi-Speed DC Mechanical Shear, and an automatic
6-strip Multi-Blank Stacker. The line is capable of producing
precision-tolerance blanks to ±0.005" length and ±0.002" width
tolerances
60,000# x 72" x .018"/.075" Precision Multi-Blanking Line
Precision Hydraulic Roller Leveler
A massive 4-post computer controlled shape
correction Hydraulic Leveler is employed to produce panel flat
blanks and sheets. The Leveler is equipped with seventeen 1.500"
diameter work rolls in a 5-Hi roll arrangement supported by nine
back-up flights. The work rolls are positioned by 18-hydraulic
cylinders (9-entry and 9-exit). Each cylinder is independently
adjustable to provide precise roll positioning and roll bending
necessary for the elimination of strip shape defects such as
coil-set, center-buckle, and wavy-edges. A 2.80 GHz 40 GB HD
computer precisely adjusts each cylinder via position data from
linear voltage transducers installed in each cylinder. Work roll
positioning is automatically accomplished based upon material
thickness and yield strength data entered into the computer
terminal by the operator. Work roll gap and roll bend
adjustments can be made while running. A computer memory allows
the operator to "save" work roll position parameters via job
number for future recall, a time-saving feature when processing
partial coil orders. The Leveler will automatically position the
work rolls and back-ups to the exact roll gap and roll bend
positions employed when the coil was previously run. Periodic
Leveler "calibration" is automatically accomplished in
5-minutes without any tools.
Braner/Loopco Levelers employ no reversing
motors, screw jacks, sliding wedges, or tilting top frames to
position the work rolls. As a result, work roll positioning is
precise and maintenance is minimized.
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1.500" x 17-Roll x 9-Flight x 5-Hi Hydraulic Leveler
Pushbutton Tooling Lock-Up Turret Head™
Slitter
Multi-blank and side-trim slitting is
accomplished by a quick-change 2-head precision Turret Head™
Slitter that allows Mi-Tech to prepare a tooling set-up while
the line is in production. The ability to prepare a slitter
set-up while the line is running offers a huge productivity
advantage over multi-blank slitters that require the line be
shut down while making a set-up. The Turret Head™ Slitter is
equipped with a "pushbutton" tooling lock-up system that
employs hydraulic cylinder powered tooling lock-up clamps
instead of the common grease gun actuated threaded lock nut. The
pushbutton system reduces set-up time and eliminates lock nut
maintenance and worn arbor threads. As with all Turret Head™
Slitters, the slitter heads are exchanged in one-minute.
Turret Head™ Slitter
Special Multi-Blanking Tooling:
While most multi-blanking lines
are shut-down for 15-35 minutes preparing the next slitter
set-up, the Mi-Tech slitter is set-up while the line is running.
Once the set-up is completed, exchanging slitter heads takes
one-minute. In order to complete a slitter set-up in the 30
minutes or so it takes to process a multi-blank order, the
slitter is equipped with a tooling package designed specifically
for multi-blanking. Unlike coil-to-coil slitting lines that
commonly generate from 10 to 20 cuts as narrow as 1",
multi-blanking lines typically produce from 2 to 4 strip
multi-blanks wider than 5". The new multi-blank tooling package
allows a 2 to 4 strip multi-blank set-up to be completed in
15-minutes by reducing the number of spacers used in a set-up.
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