TPT July 2014

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Finishing and end f inishing
84 July 2014
End preps for offshore
piping systems
AN upgraded welding end prep tool
for machining high temperature, high
pressure pipe used on severe-duty
offshore piping systems and shale
pumping stations is being introduced
by Esco Tool.
The Millhog® Dictator
bevelling machine is a
portable ID clamping
pipe milling machine
designed for dry-cutting
high-temperature, high-
pressure pipe from 4.5"
ID to 18" OD.
Suited to stainless
steel and Super Duplex
piping systems, the tool
features a new 3 HP
air motor designed for
high performance in
environments that have
dirty air and high moisture
content.
The air motor is easy
to clean and maintain
by just removing one
screw to access the
rotor and vane assembly,
instead of removing the
motor from the tool. The
Millhog Dictator bevelling end prep
tool develops 4,100ftlb of torque at the
cutter blade and pulls a continuous
thick chip without cutting oils.
The blades are TiN coated and
dissipate heat away from the pipe’s
surface, and produce a clean,
consistent thick chip without cutting
oils that eliminates the need for hand
grinding or using complex clamshell
tools.
The simple-to-operate Millhog
Dictator features extra wide ID clamps
with steel contact points that quickly
expand and rigidly mount the machine
to the pipe. These durable clamps are
quickly changed, and only eight sets
are required for the complete range.
The Esco Tool Company was founded
in 1954 and developed the first portable
end prep tool for the Triton nuclear
submarine programme.
Esco Tool – USA
Fax: +1 508 429 2811
Email:
Website:
Double end machining centre
from Haven Manufacturing
A NORTH American automotive shock
absorber manufacturer required a
machine to perform chamfering,
end face, counter bore and OD
reduction simultaneously, and Haven
Manufacturing came up with a solution
to this rare problem.
The era of the traditional double
end chamfering machines is almost
non-existent, according to Haven
Manufacturing. Double end chamfer has
evolved into increasingly sophisticated
machines that have to meet very
stringent OEM specifications, whether
for automotive, aerospace or furniture.
Haven states that its ability to adapt
to changing customer requirements has
sustained its reputation as a flexible
and creative design and manufacturing
company. For this application, the
customer required a machine that
performed the traditional chamfer
and end face, but also a counter bore
on one end of the shock absorber
tube and a diameter reduction on the
opposite end, all done within the same
workstation.
The solution required a combination
of servo-controlled feeds and speeds
to maximise the production cycle and to
minimise the size and amount of offal.
Removing this much material, chips
can become a major issue, so chip
size control was critical. Incorporating
chip-breaking technology through servo
programming gave the machine this
capability.
For part handling, an overhead pick-
and-place system was used to transfer
the tubes into and out of three positions:
staging, workstation and chip blowout.
Precision ground linear support and
servo motion control allows for minimal
setup time and a statistically repeatable
performance. The ability of this machine
to complete all machining operations in
one step ensures that the part will meet
all geometric dimensional tolerances.
This was the third machine of this
type that Haven has built. The company
says that it understands the stringent
requirements the automotive industry
demands, and has the knowledge,
flexibility and design experience to
produce the desired solution.
Haven Manufacturing Corp – USA
Fax: +1 912 264 9001
Email:
Website:
Esco’s Millhog Dictator bevelling machine