FIVE-AXIS MACHINING SUPPLEMENT
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September 2019 www.machinery.co.uk @MachineryTweets
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High precision machining with
Hainbuch systems at Tecomet
Tecomet is a market-leading manufacturer
of complex, high precision
products and services for
the medical device,
aerospace and defense
sectors. It is employing
Hainbuch’s (https://is.gd/
buzoru) Manok stationary
clamping system to support
5-axis machining.
With 17 global
manufacturing facilities in ve
countries, Tecomet employs
over 2,500 people. At the company’s
Shef eld facility, Hainbuch provided the
most suitable and exible solution. The
company’s rst investment in Hainbuch
equipment was the 65 mm Manok
stationary chuck for its DMG DMU 50
5-axis machining centre.
Tecoment’s Stephen Jackson says:
“What we used to do here is hold the job
in a two-jaw chuck and this gave us a lot
of issues with vibration and positional
accuracy. So, we opted for the Manok 65
from Hainbuch and it solved a lot of
issues for us. The positional accuracy is
spot on and there are no more scratches
or issues with surface nish. Furthermore,
it has saved a lot of re-working and
secondary nishing – it’s a very good
system.”
Other bene ts include: better tool life;
reduced tooling costs; faster cycle times;
maintenance of part tolerances of ±10
microns.
Following the success of the Manok,
Tecomet purchased a pneumatic xture
plate with six Hydrok 42 mm collet chucks
from Hainbuch. Used in the production of
a medical tibial tray from a forging
requiring a small amount of machining.
Jackson again: “Despite using a
pneumatic system, we are not suffering
from any lack of clamping force – it’s just
about ensuing we have the right air
pressure in the system. The Hainbuch
unit is also interchangeable and we can
put other 3-axis jobs on the machine in
the Hydrok con guration. The
exibility is impressive, as the
xture plate and Hydrok system
can be transferred to any of our
3- and 5-axis machines. Before
the Hydrok system, we used to
clamp jobs in two-jaw chucks
and jobs used to spin and
vibrate, and even mark the
surfaces. Now, we can hit jobs
much harder and faster.
Workholding is the most
important part of our business,
without that you have nothing.”
Holtex holds rm precisely with Haimer
Holtex Engineering Solutions provides
prototype and small quantity production to
the highest quality in the shortest lead
time. It is using Haimer tool presetting
equipment to support latest multi-axis
turning machines, as well as 3- and
5-axis milling.
Holtex Engineering Solutions director
Ben Robinson says: “Our technology is
supported by high quality tooling that is
complemented by the Haimer Power
Clamp Special Edition heat-shrink system
for the milling section and the Haimer
UNO20/40 Microset tool pre-setter.
“The reason we invested in Haimer
was because a lot of the jobs we do are
relatively high precision and we are using
quite delicate tooling at times.
Additionally, the machinery we have is
only as good as the tooling we put in it
and the more accurate our tooling is, the
better off we are from the start.”
He says that the tooling is lasting
considerably longer, due to muchimproved
accuracy and run-out. It is very
easy to use and, concludes Robinson,
with 10 minutes’ training, anyone can use
the Haimer systems.
Five-side access with minimal gripping
and no need to stamp
Available from Roemheld’s Hilma division,
the xed-jaw SCS vice is compact and
allows good accessibility, supporting veside
machining without collision using
short standard tools that lower costs and
improve workpiece accuracy, due to the
generation of less vibration.
Stability of the clamping systems and
high retention force resulting from the use
of a reversible jaw mean that there is no
need to pre-stamp a workpiece before it is
secured, even when it is clamped on just
a few millimetres of material.
Repeatability of positioning is to within
±10 microns.
Suitable for use in multi-pallet
prismatic machining cells, operation is
either mechanical, via a threaded spindle
and torque wrench, or hydraulic, using a
single-acting cylinder to effect the
clamping pressure and with unclamping
achieved by spring force.
A variety of base lengths up to 350
mm is offered, with different clamping
ranges to 300 mm, while clamping force
is up to 40 kN at 100 Nm. An extensive
range of hardened and ground jaws, as
well as soft jaws, in 80 mm and 120 mm
widths is available.
SUPPLEMENTFIVE-WORKHOLDING
The best 5-axis machine tool in the world will fail in its intended task,
if the material being cut is not held securely
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