CNC 235 / CNC 245
Hard Machining Center
DVS Group. Advanced German Engineering unified in one group.
Buderus Schleiftechnik is one of the
globally leading specialists in hard
machining of rotation-symmetric parts
for example in the aerospace and
automobile industry.
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Buderus Schleiftechnik GmbH
Buderus Schleiftechnik – a name for core competence in internal, external and
thread grinding. Buderus Schleiftechnik is one of the globally leading specialists
in hard machining of rotation-symmetric parts.
Together … advantages recognized and adopted
For the process steps of one
production line only one contact for turning, gear cutting
and grinding. The CNC 235 is
one version of the machine
line N1 which is a jointly development of the DVS group.
The group members use appropriate subassemblies for
your own customized machine solution.
The right partner
With CNC-controlled machine tools and grinding centres Buderus Schleiftechnik is
your competent partner for the machining of precision parts in high batch and make-toorder production. Each of the tailor-made solutions from Buderus Schleiftechnik is characterized by know-how and competence. Qualified employees ensure highest product
quality. Communication is important.
Customer requirements are our benchmark
The philosophy of complete machining in one chucking and the strict orientation towards customer demands have led to compact machines designed in a modular construction system which offers the highest degree of flexibility. These are used wherever
complex machining operations have to be executed within the shortest cycle times and
where smallest shape and positional tolerances are required. In the automotive industry,
the tool industry, the ball screw production and in aerospace technology – worldwide.
Customer advantage of synergy effects
„Reduced
training effort and cost
„Advantages
for service and maintenance
„Coordinated
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interlinking and loading
Buderus CNC 235 / CNC 245 Hard Machining Centre
Hard machining centre CNC 235 /
CNC 245
With the hard machining centres CNC 235 and CNC 245 two model ranges are
available in two sizes, for the processes OD grinding, ID grinding and (hard)
Turning in one machine. Thus, components can be completely finished in just
one clamping. The machine can be used in its various automation stages both
for small series as a flexible machine as well as for large series as a highly productive machine.
Simultaneous machining
Apart from sequential machining, the machine can also be fitted for simultaneous
machining. We talk about simultaneous machining when several tools are working
simultaneously on one component or several components are being machined simultaneously. In the case of the CNC 235 and CNC 245, both the variants are possible. Two
additional axes below the grinding spindles allow e.g. simultaneous external and internal grinding. The simultaneous machining of two components can be achieved by the
deployment of two main spindles in one machine. The handling of the parts takes place
according to the proven Pick-Up principle. This means that the machine axes are used,
to pick up the component with the vertical work spindle directly from the conveyor. This
saves additional axis for the loading.
Optional upgrating
But if required additional axis are at disposal, for example for loading/unloading the post
process measuring station. Also turn-over stations to machine the part from both sides.
Adaptation to your requirement
Nonetheless, additional handling axes, e.g. for loading and unloading of an external
measuring station, can be used. A rotating station for machining the parts from two
sides is optionally possible. All in all, both model ranges combine flexibility as well as
productivity through maximum utilization of modular construction. As a result, the
machine can be customized particularly for your application and your component. With
the large number of possible variants, your machine will surely also be included.
Ask us!
The Hard machining centre CNC 235 / CNC
NC 245
equipped for a sequential and simultaneous
neous
machining
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Hard machining centre CNC 235 / CNC 245
„no
re-clamping errors owing to complete machining
„high
productivity owing to simultaneous machining
„high
flexibility owing to modular construction
„different
„high
automation concepts
work piece accuracy and concentricity accuracy
„reduction
of the cycle time by up to 50%
„customized
„reduction
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solutions
of the auxiliary time
Buderus CNC 235 / CNC 245 Hard Machining Centre
Modules at the center of attention
The application of compact and
modular machines with maximum
flexibility is multifarious:
in automotive industry, tool
industry, aviation and aerospace
technology.
According to the Pick-Up
principle, the work piece
performs all the movements.
The machine can have up to
4 cross slides depending on
the complexity of the requirement. The work piece load
and unloading can be variable
by conveyors on all sides of
the machine. In combination
with additional handling axes
is the loading and unloading
directly from transport baskets
or other part storage with
higher capacity possible. The
integration of post-process
devices, marking machines,
spinning stations etc. are
available as standard solutions. Of course, different
spindles with different electrical power are used.
diaphragm
i h
clamping
l
i
chuck
pitch line
e clamping
clam
clam
lamping
mping
device
Buderus clamping devices
collet chucks
Chucking device
One important module of a machine tool is a safe and reproducible locating and clamping device
for the workpiece. Therefore, Buderus Schleiftechnik mainly depends on self-developed clamping
devices like tooth flank clamping device for locating gears in the pitch line diameter. With these
clamping chuck the radial clamping forces are minimized.
Cross slide and
main spindle
ID grinding
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A thousand possibilities –
exploit them for your special requirements.
The modular system starts with the machine bed. Sizes of 1,200 mm up to 7.320 mm are
available. This gives rise to small, compact machines with only one machining station up to the
simultaneous machines with two main spindles, which are then bigger, but taking into account
the options that they provide, still remain compact.
Naturally, the machine bed is available not only in
welded construction but also, as is usual at Buderus
Schleiftechnik, in natural granite.
The standard machining and handling modules available are for
„Internal
grinding
„External
grinding
„Turning
(with one or more tools)
„Rotary
turret (with driven tools)
„Measurement
„Turn-over
of components
„Additional
X- or Z-axes for simultaneous machining
„Of
course, taking into account all the modules with the DVS-Group,
many more possibilities are conceivable and integrable in the machine.
Internal grinding
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External grinding
Simultaneous slide
Measuring probe
Turning tool
Rotary turret
Buderus CNC 235 / CNC 245 Hard Machining Centre
Internal Thread Grinding
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Configuration
small, fast and flexible
The modular system provides numerous possibilities
to equip the machine according the current requirement.
CNC 235 A
Small grinding machine with only one tool for
external grinding, internal grinding or turning,
Bed length 1.200 mm
Small space requirement!
CNC 235 I-A-8TR SiMac
Simultaneous grinding and turret for complete machining of diameters and faces, Bed length 2.400 mm
Shortest cycle time due to simultaneously
machining
CNC 235 DH-I-A-T SiMac
Simultaneous grinding and turning with two main
spindles, complete machining in one clamping,
Bed length 3.000 mm
There’s nothing faster!
CNC 235 H A-8TR
Turning and grinding of shafts in on clamping, bed
length from 1.800 mm up to 3.600 mm
Complete machining in one clamping!
Use the possibilities!
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Buderus CNC 235 / CNC 245 Hard Machining Centre
Buderus CNC Shaft
Grinding Machines
Tooling
The shaft grinding machines from Buderus Schleiftechnik are designed
for grinding OD and ID on shafts. Moreover, the integration of other
processes like turning and milling is also possible. Based on the machining application, the machines are equipped with up to 6 machining
units which offer capabilities for simultaneous machining.
Cross Slides and Axis
Up to 4 cross slides are mounted to the vertical machine base. The cross
slides can be equipped with different grinding units or other peripheral components. The
work spindle and the tailstock are assembled in horizontal orientation. With this design, it
is possible to machine bearing seats, OD of splines, grooves and faces all in one clamping.
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CNC 235 M and CNC 245 M
Center Drive Grinding Machines
Quality and Cycle Time
The Buderus center drive grinding machines are ideal for machining hollow shafts, because the center drive allows both a simultaneous machining and complete machining in one clamping for
IDs, ODs and faces on both sides of the shaft. The single clamping is able to maintain high runout accuracy between ground
surfaces, while achieving substantial reductions in cycle time.
Simultanously ID and OD grinding hollow shafts
The machines are ideal for machining hollow shafts, currently
used in today’s state-of-the-art dual clutch transmissions. The
part is clamped in a diaphragm chuck in the center drive, optional with hydrostatical bearing. A steady rest or tailstock can be
used, if needed for support, based on machining requirements.
High efficient solutions
High process reliability can be obtained with in-process measuring devices and touch probe systems to achieve tight grinding
tolerances. The vertical machine design provides easy access to
all grinding systems. These machines are offered in two sizes and
feature machining solutions for a broad range of applications. State-of-the-art
handling and part storage systems round out the configuration, resulting in highefficiency solutions for manufacturing transmissions.
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Buderus CNC 235 / CNC 245 Hard Machining Centre
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Highlights
Two main spindles
Why only one component?
One controller, one conveyor
belt, one machine bed, one
chip conveyor, one exhaust
and one housing are enough
even for two main spindles.
So why not combine two machines into one? As a result,
double the number of parts
can be produced in the same
time.
More parts for less cost
with less space requirement!
Simultaneous grinding
Why consecutively?
Simultaneous grinding has
been a specialty of the Buderus Schleiftechnik company
since more than 20 years.
One additional X-axis and one
additional Z-axis can be used
on the CNC 235, to be able to
carry out internal grinding and
external grinding simultaneously. This shortens the main
operation time by the machining time of the shortest grinding operation.
Double savings
It is not only the grinding time
that is reduced by the additional cross slide. The dressing of
at least one of the two grinding wheels can be shifted to
the auxiliary time by a clever
arrangement of the dressing.
This results in an additional
reduction of the cycle time.
Modular Construction
In principle, anything is possible!
The simultaneous grinding as well as the use of two main spindles only becomes possible
by the intelligent exploitation of the construction kit und the variable working space in the
machine up to an XXL working space. The construction kit allows the customization of the
machine specifically to your application.
Because ...
... in principle, anything is possible!
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Buderus CNC 235 / CNC 245 Hard Machining Centre
Technical data
CNC 235 / CNC 245
Number of main spindles
CNC 235
CNC 235 DH
CNC 245
CNC 245 DH
1
2
1
2
max. work part diameter
mm
200*
200*
350*
350*
max. part length
mm
150*
150*
250*
250*
4*
6*
4*
6*
90/30
90/30
60/30
60/30
CNC 235 H
300
CNC 235 H
750
max. number machining station
rapid feed speed X / Z
m/min
* standard
CNC 235 H
max. part diameter
mm
250
250
distance between centers
mm
350*
750*
4
4
max. no. of tools
swivel range for grinding spindle
grd
+/- 45
+/- 45
max. grinding wheel diameter
mm
600
600
m/min
90/30
90/30
CNC 245 H
300
CNC 245 H
750
CNC 245 H
1000
CNC 245 H
2000
CNC 245 H
3000
rapid feed speed X / Z
* standard
CNC 245 H
max. part diameter
mm
800
800
800
800
800
Distance between centers
mm
300*
750*
1000*
2000*
3000*
6
6
6
6
6
max. no. of tools
swivel range for grinding spindle
grd
+/- 45
+/- 45
+/- 45
+/- 45
+/- 45
max. grinding wheel diameter
mm
750
750
750
750
750
m/min
30/30
30/30
30/30
30/30
30/30
CNC 235 M
CNC 245 M
rapid feed speed X / Z
* standard
CNC 235 M / CNC 245 M
max. clamping diameter
mm
100*
200*
max. part length
mm
750*
1000*
4
6
max. no. of grinding spindles
* standard
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Service all over the world
Buderus Schleiftechnik machines are used everywhere high performance is required. Service in close proximity to our customers is an important part of our
product policy to ensure that these requirements are satisfied reliably on a longterm basis.
The objective of all our services is to enduringly increase our customers‘ profit, as well as
to fulfill our customers‘ requirements and expectations better and more quickly.
To achieve this goal we offer a variety of services, developed in cooperation with our
customers and continuously adapted to the changing requirements and conditions.
We offer the following services to extend the service life of our machines:
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Maintenance/ Service
Buderus CNC 235 / CNC 245 Hard Machining Centre
Members of DVS Group
BUDERUS Schleiftechnik I www.buderus-schleiftechnik.de
Innenrundschleifen – Außenrundschleifen – Gewindeschleifen – Hartdrehen
I.D. grinding – O.D. grinding – Thread grinding – Hard turning
DISKUS WERKE Schleiftechnik I www.diskus-werke.de
Planschleifen – Doppel-Seiten-Planschleifen – Sonderbearbeitung
Face grinding – Double face grinding – Special machining
HEYLIGENSTAEDT I www.heyligenstaedt.de
Wellendrehen - Fräsen - Schwerdrehen
Shaft turning - Milling - Heavy duty turning
NAXOS-DISKUS I www.naxos-diskus.de
Konventionelle Schleifwerkzeuge – CBN – Diamant
Conventional grinding tools – CBN – Diamond tools
PITTLER I www.pittler.de
Vertikaldrehbearbeitungszentren – Fräsen – Schleifen – Pick-up-Systeme
Vertical turning center –Miling – Grinding – Pick-up systems
PRÄWEMA I www.praewema.de
Verzahnungshonen/-schleifen – Verzahnungsfräsen – Anspitz-/Hinterlegungsfräsen
Gearhoning – Geargrinding – Hobbing/Fly-cutting – Chamfering
DVS Technology I www.dvs-technology.de
DVS Technologien im Serieneinsatz
DVS Technologies in mass production deployment
WMZ Werkzeugmaschinenbau Ziegenhain I www.wmz-gmbh.de
Mittenantriebsmaschinen – Motorspindeln
Center drive turning – Motor spindles
WMZ Precision Machinery (Shenyang)
DVS Sales China - DVS Service China
DVS Sales China - DVS Service China
Buderus Schleiftechnik GmbH
Industriestraße 3
35614 Aßlar
Germany
Tel.: + 49 (0) 6441 8006 0
Fax: + 49 (0) 6441 8006 16
Email: info@buderus-schleiftechnik.de
www.buderus-schleiftechnik.de
www.dvs-gruppe.com