Apparatus for Working Tubes, Bars, Sections and Similar Blanks, Comprising a Plurality of Machines Arranged in Line
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United States of America Patent
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Issued Date -
Nov 5, 2015
app pub date -
Apr 27, 2015
filing date -
May 2, 2014
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Abstract
The apparatus includes a plurality of machines (10, 12, 14) arranged in line along a longitudinal direction (x) coinciding with a feed direction of the blank (C). Each machine (10, 12, 14) is provided with rollers (18, 20, 22) arranged to be driven into rotation by respective motors to work simultaneously on the blank (C) and with a control unit arranged to control these motors. Each machine (10, 12, 14) is provided with a measuring device (24) adapted to provide the control unit of that machine with a measure of the overall reaction exerted by the blank (C) under working on the rollers (18, 20, 22) of that machine along the longitudinal direction (x). The control unit of each machine (10, 12, 14) is arranged to torque-control the rollers (18, 20, 22) of that machine in such a manner that the overall reaction exerted by the blank (C) under working on the rollers (18, 20, 22) of that machine along the longitudinal direction (x) is equal to a predetermined value, zero included.
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