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Some tube production processes, such
as that for plastic pipes, produce tubes at a relatively slow speed and only
require perhaps a wall thickness measurement around the circumference. To
use one of the standard Unicorn rotary heads for this type of application
would be an 'overkill' and Unicorn have therefore produced a relatively low
cost oscillating scanner known as the REVSCAN. |
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| The REVSCAN (Fig 1) consists of an
oscillating faceplate (typically 2 revs/sec) driven by a belt from a
standard motor and gearbox. Mounted from the faceplate are two or four wall
thickness probe units either contact shoe type or , if the customer prefers,
"free jet" type. The contact shoe type has a fully gimballed probe block
with a specially developed ultra-low water flow system; different tube
diameters are accommodated by using interchangeable probe blocks with
matching radii. The complete mechanical unit can be installed within a very
short space in the production line and does not have any special
requirements. Each probe block contains a single ultrasonic compression wave
transducer for the measurement of wall thickness |
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