Studer S31 Universal Cylindrical Grinding Machine
Studer S31
Studer S31
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The S31 is designed for the grinding of workpieces in individual as well
as small and large series production operations. It can be automated and
is - thanks to its universality - especially suitable for use in the
tooling and aerospace sectors, for example.
Centre height 175 mm (6.9"), Centre distance 1000mm (39.4")
Features:
Distance between
centres of 650
(25.6") or 1000 mm (39.4")
Revolving
wheelhead that can be swivelled manually or automatically
High-resolution B
axis
Frequency-controlled motor grinding spindle for external and
internal grinding
C-axis for the
workhead for form and thread grinding
Selection of
several workhead models available for different grinding jobs
Full enclosure
with 2 sliding doors
Machine base made
of Granitan
Standardised
interface for loader and peripheral devices
Extensive range of
accessories
Specifications:
Grinding length
26/40"
Center height
7"
Workpiece weight
176/264lbs.
Swivel range
wheelhead
-15 to +195°
Grinding wheel
dimensions
20" x 3"
Spindle drive
10 hp
Studer S31cnc Universal Cylindrical
Grinder with ID and OD Grinding Spindles
S31 cnc Offers Large Capacity, Proven Precision and Flexibility
Modular design for quick setup and changeover, state-of-the-art digital
control and drive systems and user-friendly step-by-step programming
make the S31cnc a remarkably flexible solution to a wide variety of
internal and external cylindrical grinding applications. Center height
is 175 mm. Between-centers grinding length is 650 mm, or 1,000 mm. Wheel
size: 500 mm x 63 mm x 203 mm. Chuck capacity between centers is 130 kg.
A dual wheelhead arrangement presents two external grinding wheels for
rough and finish grinding in the same setup. The two wheels are
diagonally positioned and have independent, programmable spindle drive
systems to fully optimize the grinding process. Another wheelhead
configuration is left/right with internal grinding for universal
applications which allows OD, face and ID grinding in one setup.
The universal turret wheelhead with optional B-axis (fine adjustment to
0.0001 degree) swivels automatically, permitting external, internal and
face grinding of workpieces in a single setup. A serrated 1 degree
resolution Hirth ring coupling automatically maintains orientation from
-15 degrees to +195 degrees, thus providing extreme accuracy and
repeatability for grinding even the smallest tapered angles. An optional
C-axis permits ultra-precise form grinding routines for tooling
(punches, for example) and thread grinding.
S31cnc overview
Digital direct-drive, three-phase servo motors with 40-mm diameter
prestressed, precision ballscrews power the X- and Z-axes Cross slide
X-axis travel is 254 mm at speeds ranging to 5,000 mm/min. Linear
resolution is 0.0001 mm. Distance between slideways is 280 mm. Z-axis
slide travel is 800 mm/26" CD or 1,150 mm/45.3" CD. Speed and linear
resolution are respectively 10,000 mm/min and 0.0001 mm. Z-axis distance
between slideways is 200 mm. V and flat guideways are coated with
abrasion-proof Granitan S200 and provide high vibration dampening and
superior rigidity. Patented guideway design prevents hydrodynamic
effects found in conventional guideways and results in high load-bearing
over the entire machine speed range. The machine base of
Studer-developed Granitan S103 delivers outstanding vibration dampening,
rigidity and strength, as well as excellent chemical stability and
thermal compensation. Grinding spindles are powered by two 7.5 kW motor
and have high-precision roller bearings for precise, high-resistance,
maintenance-free operation. Peripheral speed up to 50 m/sec with
continuous speed control to 3200 RPM. Workpiece spindle, with
high-precision roller bearings, handles grinding between dead centers as
well as live grinding with revolving spindle. Precision control permits
fine adjustment of cylindricity during grinding operations to +/- 40 �m.
Guaranteed tolerance precision: 0.0004 mm on roundness and 0.0025 mm
straightness deviation over a length of 650 mm (straightness deviation
of 1,000 mm).
Dressing
Wheel dressing intervals may be made by the operator following these
simple methods: by pressing a pushbutton at any time during any grinding
cycle; after a programmed number of specific machined parts or grinding
operations; at programmed switchover points; at the programmed nominal
size; after a specific number of strokes - or a combination of these,
permitting the optimum solution for the specific grinding application.
Grinding wheel reference points are referred to as "T" numbers, and
together with Studer grinding cycles, "T" numbers permit programming
with nominal size. The actual value indication on the control LCD refers
in each case to the programmed wheel reference point. Values of the
grinding wheel shape are entered in a dressing dialog display at the
control.
Control & programming
The S31cnc features state-of-the-art Fanuc 16i digital control and axis
drive components - or optional Fanuc 21i, a more cost-effective solution
for less demanding applications. Machine operation, setup, changeover,
dressing and programming of even complex parts are easily accomplished
through the innovative, step-by-step Studer Pictogramming which allows
operators simply to connect grinding cycles to one another and add
necessary numerical values. The control then generates the machine
program automatically. Advanced manual programming in G code is of
course also possible. Programming is done directly at the machine or
off-line and then downloaded to the machine control. Process parameters
can be changed on the fly, while the machine runs, without affecting the
workpiece program. The S31cnc control package features proven
application-specific Studer grinding cycles for diameters, shoulders
(left and right), tapers (negative and positive), contours, forms and
threads.
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