Vertical shaft machining VTC 250 / 250 DUO
The VTC series of machines are designed for the vertical machining of shaft-type components. Users of these vertical turning centers profit from minimal throughput times, true process capability and outstanding precision. These machines provide for the completemachining of shafts on a single machine – automation included. Technology modules ensure the VTC machines can be customized to suit individual machining requirements.
V T C V T C
2
2 5 0 2 5 0
D U O
Vert i c a l s h a f t mac h in in g
3
VTC – machining shafts to perfection.
The development of the VTC series of
The vertical construction guarantees
machines followed the same governing
unimpeded chip flow, making it hardly
principle that led to the success of the
ever necessary to remove chips
EMAG chuckers. As with all EMAG
manually. This is very important in
turning and production centers, the
soft-machining, because the process
cornerstone of the design is the sturdy
frequently produces large volumes of
MINERALITÂŽ polymer concrete machine
chips. The spindle motor, main spindle,
base. The vibration damping properties
turret and electrical cabinet are all
of this polymer granite base are eight
fluid-cooled. With their great power, high
times better than those of cast iron,
spindle speeds and sturdy turrets the
making it the superior material,
machines of the VTC series are highly
especially when it comes to the more
productive turning centers for the
demanding machining processes. Its
machining in four axes. Tailstock and
excellent damping properties lead to a
steadies are CNC-controlled. In addition
better surface finish and a much
to workpiece grippers, every turret can
extended tool life
be equipped with stationary turning tools or driven drilling and milling tools.
V T C V T C
4
2 5 0 2 5 0
D U O
5
Complete-machining shafts.
The VTC is available with a single spindle
Advantages of the VTC series:
or in its DUO version. The DUO com-
•• Four-axis machining reduces
bines the functions of two four-axis turning machines and offers different
cycle times •• Concurrent loading and unloading of
machining technologies on its
the workpieces reduces idle times
two stations. These machines are
which minimizes cycle times
increasingly being converted into
•• The compact design makes for a
multi-functional production centers
small footprint. Lower capital outlay
that include, for instance, endworking
for automation and peripherals
operations such as cutting to length
(raw-part and finished component
and centering, as preparation for the
storage sectors form an integral part
subsequent four-axis turning or as a
of the machine)
down-stream process. And all of this
•• Less manual intervention (tailstock
is completed in a fully automated cycle
and steadies are CNC-controlled; the
on a single machine.
operator has direct access to the turrets)
V T C V T C
2 5 0 2 5 0
D U O
Shaft machining: centering and end machining
6
Machining a steel piston: plunge-cutting the grooves
•• Short set-up and resetting times
The cycle time-concurrent loading and
•• Less capital outlay for sensory
unloading is accomplished by the turrets.
equipment due to direct driven
Example: automation on the VTC 250 DUO
machine axes and modern control
The gripper in turret 1 collects the
technology
workpiece from raw-part storage and
•• A smaller number of set-ups and
conveys it into the first clamping
better component quality through
position.
complete-machining
The gripper in turret 2 removes – the machined component from the first clamping position and conveys it to the second one. The gripper in turret 3 simultaneously removes the component from the second clamping position and moves it to the storage sector for finish-machined components.
Component changeover: the finished component is removed and taken to its storage place; the new raw-part is loaded (sequence from right to left)
Rear wheel axle being super-finished
7
VTC production lines.
The VTC series of machines is designed
When production requirements change,
to handle complex manufacturing
the machines of the VTC series can
processes. Whether the job includes
easily be equipped with different
the high metal removal rates of turning
technology modules for the new
and milling or a grinding process –
workpieces.
the machines offer the possibility to integrate most metal cutting processes. This makes them perfect for the formation of complete production lines for soft- and = hard-machining. Applications that include turning, milling, drilling, grinding and gear cutting operations have already been realized on this machine platform.
V T C V T C
2 5 0 2 5 0
D U O
OP 10 + 20 Cutting to length, centering, turning (VTC 250 DUO)
8
OP 30 milling the pin bearing (VTC 250 F)
The following technologies are available: •• Soft-turning •• Milling (side-and-face cutter) •• Drilling •• Gear hobbing •• Hard-turning •• Scroll-free turning •• Grinding / simultaneous grinding •• Out-of-round turning This guarantees flexible use of the machine and provides access to a wide range of applications, as the technologies can also be used in a variety of combinations.
OP 40 oil hole drilling (EMAG HSC 800)
OP 50 centric turning (VTC 250)
OP 60 eccentric turning (VTC 250)
9
Technical data.
Capacity
VTC 250
VTC 250 DUO
Chuck diameter
mm
250
250
Workpiece diameter max.
mm
140
140
X-axis / Z-axis travel
mm
300 / 740
300 / 740
Length, max.
mm
630 / 1,000*
630 / 1,000*
Weight, max.
kg
20
20
s
4–5
4–5
s
6–7
6–7
Quantity Size dia. in mm
1 6 110
2** 6 110
rpm
5,000
5,000
Power rating, 40% / 100% duty cycle
kW
38 / 29
38 / 29
Full power at a spindle speed of Torque, 40% / 100% duty cycle
rpm Nm
1,400 250 / 200
1,400 250 / 200
or Power rating, 40% / 100% duty cycle
kW
48 / 38
48 / 38
Full power at a spindle speed of Torque, 40% / 100% duty cycle
rpm Nm
1,200 380 / 300
1,200 380 / 300
in in in
9.8 5.5
11.8 / 29.1
9.8 5.5
11.8 / 29.1
Workpiece
Loading time, depending on workpiece and clamping mode Chip-to-chip time depending on workpiece, clamping mode and machining cycle
in
lb
24.8 / 39.4* 44
24.8 / 39.4* 44
Main spindle Main spindle Spindle nose to DIN 55 026-A Spindle bearing, front Speed, max.
dia. in inch
4.3
4.3
Main drive hp
ft-lb
hp
ft-lb
51 / 39
184 / 148
64 / 51
280 / 221
51 / 39
184 / 148
64 / 51
280 / 221
Feed drives Rapid-traverse rate X / Z
m/min
ipm
30 / 40
1,181 / 1,574
Feed force X / Z
kN lbf
2,113 / 2,248
2,113 / 2,248
Ball screw X / Z
dia. in mm
32 / 40
32 / 40
EMAG disc-type turret
Quantity
2
2–3
Tool receptors per turret for cylindrical shanks to DIN 69 880 Shank diameter
Quantity mm
11 40
11 40
Quantity
1
3
dia. in inch
9.4 / 10
30 / 40
1,181 / 1,574
1.3 / 1.6
9.4 / 10 1.3 / 1.6
Tool carrier
Loading gripper / unloading gripper
in
1.6
1.6
** 1 main spindle when end machining
10
Subject to technical changes
*special length 1,000 mm (39.4 inch)
Technical Data. Floor plan VTC 250 c
a
d
b
Floor plan VTC 250 DUO c
d
b
VTC 250 (630 / 1000)
VTC 250 DUO (630 / 1000)
Length a
mm
3,100
3,100
Width b
mm
3,100
4,100
Width c
mm
4,900
5,900
Height d
mm
3,900 / 4,300
3,900 / 4,300
Weight
in in in in
122.0 122.0 192.9
153.5 / 169.3
122.0 161.4
a
Dimensions and weights
232.3
153.5 / 169.3
approx. kg 14,000 / 16,000 21,000 / 24,000 approx. lb
30,865 / 35,274
46,297 / 52,911
Subject to technical changes
11
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Subject to technical changes.
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