SPANNTOP

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SPANNTOP
SPANNTOP®: Systematic clamping
■ outside clamping
■ inside clamping
■ in front of the chuck
02.2007
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HAINBUCH. Workholding technology
HAINBUCH manufactures clamping devices. We have been doing it for more than
50 years, and are now in the third generation. The company is headquartered in
Germany. Hainbuch has subsidiaries in France, Italy, Sweden, Thailand, and the
USA. In addition there are several national and international commercial agencies.
The SPANNTOP system developed by HAINBUCH is a genuine classic. It is extremely easy to handle and convincing in implementation: For example in turning centers
and milling centers, on gear cutting machines and grinding machines, or also on
rotary transfer machines and friction welding lathes. Wherever rigidity, precision,
and ease of change-over are required. This is where the strengths offered by the
modular structure really shine.
With SPANNTOP, one fits into the other: With its different adaptations the
chuck offers an incredible number of clamping possibilities, which not
only optimizes the production process, it also optimizes the balance sheet.
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SPANNTOP. The original
Drawtube
adapter
SPANNTOP chuck
[pages 4 – 11]
■ combi pull-back for chuck
elements and bar work
■ combi deadlength for work
pieces with short collar
■ modular for bar work
Clamping head [page 12]
■ for clamping of raw material
■ for clamping of
finished material
■ machinable to size
Changing fixture
[page 13]
■ manual
■ pneumatic
■ pneumatic-hydraulic
MANDO Adapt [page 14]
Mandrel-in-SPANNTOP-chuck
■ for I.D. clamping
?
Often copied, never equaled. SPANNTOP is well
thought-out in all the details – from drawtube
adapter to changing fixture. See for yourself:
The advantages of the SPANNTOP
system
■ rigidity
■ concentric accuracy
■ quick change-over
■ circumferential clamping
■ vibration damping
■ axial draw force against the end-stop
Jaw adapter [page 15]
Jaw-clamping-in-SPANNTOP-chuck
■ for clamping in front of the chuck
SPANNTOP . The original
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SPANNTOP. Chuck types
SPANNTOP chuck
Combi pull-back
With axial fixed end-stop
for chuck elements and a
through-bore capacity for
bar work.
The clamping head pulls
the work piece onto the
end-stop.
4
SPANNTOP chuck
Combi deadlength
With axial fixed clamping
head and end-stop for
chuck elements and
through-bore capacity for
bar work.
SPANNTOP chuck
Modular
With a through-bore for
bars and tubes.
SPANNTOP . Chuck types
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Circumferential clamping
Axial force against the end-stop
In particular:
Work pieces can also be
clamped very short.
Circumferential clamping
Radial clamping without
axial movement
In particular:
Work pieces can also be
clamped on a short collar
or shoulder.
Circumferential clamping
Axial tension
Square, hexagon, special profiles
SPANNTOP . Chuck types
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SPANNTOP chuck combi pull-back
5
When clamping, the clamping head moves axially to the rear,
so that the work piece is pulled tightly onto the fixed end-stop.
Thus even with the shortest clamping lengths very stable work
piece clamping is achieved. Moreover, the segments of the
clamping head act like wedges between the work piece and
the massive chuck body, and thus ensures rigidity of the entire
clamping device, which greatly increases cutting tool life.
3
SPANNTOP combi pull-back is ideal
■ as through-bore chuck for bar work
■ as end-stop chuck for chuck work
■ with work pieces that have a short clamping length
1
6
4
2
1 flange
2 chuck body
3 clamping head
4 torsional safety
5 mounting threads for front end-stop
6 changeable base end-stop [can be
fixed from outside via 3 screws]
6
SPANNTOP chuck . Combi pull-back
The advantages
■ axial draw force against the end-stop, which stabilizes
clamping [important for shorter clamping length]
■ little inertia loss
■ extremely rigid
■ optimal holding power
■ simple mechanics, results in better power conversion
■ clamps work pieces with short clamping length
■ converts to a fully functional »bar chuck« when the
end-stop plate is removed
■ excellent concentricity after clamping head change
[< 0.01 mm]
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effective
clamping forces
Seite 7
Material:
Depth of cut:
Feed:
Cutting speed:
18CrNi8 / 1.5920
approx. 1.0 mm
0.25 mm/U
100 rpm
Significant time savings thanks to fast processing in the
SPANNTOP chuck without the use of a center, which is
required with a jaw chuck.
chuck
work piece
clamping head
Common-Rail injection nozzle
––––––––––––––––––––––––––––––––
Material:
18CrNi8 / 1.5920
Depth of cut:
approx. 1.5 mm
Feed:
0.25 mm/U
Cutting speed:
100 rpm
end-stop
base end-stop
Typical clamping and processing examples
Common-Rail
sun shaft
front end-stop
coolant supply is possible for
depth [end-] stop with/without ejector
flushing or for air sensing control
SPANNTOP Chuck . Combi pull-back
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SPANNTOP chuck combi deadlength
3
5
6
For this type the clamping head is coupled in the chuck and
there is no axial movement.
Tension is introduced through the axial movement of the connecting sleeve.
Thus the work piece is clamped radially without axial movement.
An interior base end-stop, or a front end-stop mounted on the
front side, can be used here as well.
SPANNTOP combi deadlength can be used
■ as through-bore chuck for bar work
■ as end-stop chuck for chuck work
■ for work pieces with a very short collar
1
7
2
4
1 flange
2 chuck body
3 connecting sleeve
4 clamping head
5 torsional safety
6 mounting threads for front end-stop
7 changeable base end-stop [can be
fixed from outside via 3 screws]
8
SPANNTOP chuck . Combi deadlength
The advantages
■ radial clamping without axial movement of the clamping head
■ clamps work pieces on a short collar or shoulder
■ converts to a fully functional »bar chuck« when the end-stop
plate is removed
■ excellent concentricity after clamping head change [< 0.02 mm]
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The example shows a situation where
the right chuck clamps the part, which is
then cut off.
pull-back
deadlength
Typical clamping and processing examples
A work piece with narrow collar must be
clamped.
Long work piece is pulled forward several
times out of the left chuck and reprocessed.
Thanks to radial clamping only the axial
clearance to the grooves is better maintained.
short clamping surface
Work piece transfer with narrow collar is an
ideal application.
SPANNTOP Chuck . Combi deadlength
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SPANNTOP chuck modular
1
2
6
5
4
3
SPANNTOP modular offers up to 35 % more rigidity and up
to 50 % higher clamping forces than conventional collet
chucks. The axial tension produced during the clamping
process draws the clamping head directly into the chuck body.
On the other hand, when using conventional collets the clamping force pushes the chuck away from the spindle nose, which
significantly decreases rigidity.
1 mounting threads [e. g. for guide rings]
2 mounting threads for front end-stop
3 clamping head with pull-back effect
4 chuck body
5 torsional safety
With SPANNTOP modular not only work piece clamping is
highly stable, but there is also a significant increase of rigidity of the entire clamping fixture. This in turn has a favorable
effect on tool life.
6 flange
The advantage of SPANNTOP relative to traditional
clamping collet chucks
The clamping force pulls the clamping head to the spindle nose. This
has a significant effect on stability.
SPANNTOP modular can be used
■ as through-bore chuck for bar work
The advantages
■ actuating force toward spindle
■ parallel/cylindrical clamping
■ optimal holding power
■ very rigid
■ parallel clamping
■ minimal wear
■ easy change-over
■ concentricity < 0.01 mm
SPANNTOP
compression force
drawtube
force
cutting force
power flow in one direction
Conventional clamping collet chuck
10
SPANNTOP chuck . Modular
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SPANNTOP. Numbers and facts
Chuck
Size
Test length
–––––––––––––––––––– Attainable concentric precision –––––––––––––––––
L
–––––––––– Round ––––––––––
Modular, pull-back Deadlength
––––––– Square/hexagon –––––––
Modular, pull-back
Deadlength
32
30
< 0.01
< 0.02
< 0.04
< 0.06
42
30
< 0.01
< 0.02
< 0.04
< 0.06
52
30
< 0.01
< 0.02
< 0.04
< 0.06
65
50
< 0.01
< 0.02
< 0.04
< 0.06
80
50
< 0.01
< 0.02
< 0.04
< 0.06
100
60
< 0.01
< 0.02
< 0.04
< 0.06
125
60
< 0.01
< 0.02
< 0.04
< 0.06
140
60
< 0.01
< 0.02
< 0.04
< 0.06
>160
80
< 0.01
Clamping range clamping heads
Size
—> d.max
-> D
capacity
chuck
L
S
Span
Opening-
Minimum
Counter bore to
Drawtube force
RPM*
range
nominal
clamping-
max. clamping Ø d
max.
max.
size
length t
Depth t
32 BZI
32
75
47
6
± 0.3
+ 0.6
8 mm
49
x 6.5
25 000 N
8000 min.
-1
32 BZIG/HSW
32
75
44
3
± 0.3
+ 0.6
5 mm
49
x 6.5
25 000 N
8000 min.
-1
42 BZI
42
120
47
9
± 0.5
+ 0.6
11mm
68
x 10
35 000 N
7000 min.
-1
42 BZIG/HSW
42
120
42
4
± 0.5
+ 0.6
6 mm
68
x 10
35 000 N
7000 min.
-1
52 BZI/BZIG/HSW
52
125
46
4
± 0.5
+ 0.6
6 mm
64
x 9
40 000 N
7000 min.
-1
65 BZI
65
145
58
9
± 0.5
+ 0.6
11mm
87
x 10
45 000 N
6000 min.
-1
65 BZIG/HSW
65
145
53
4
± 0.5
+ 0.6
6 mm
87
x 10
45 000 N
6000 min.
-1
80 BZI/BZIG/HSW
80
160
53
4
± 0.5
+ 0.6
6 mm
93
x 11
50 000 N
5500 min.
-1
100 BZ/BZG/HSW
100
215
59
0
± 1.0
+ 2.0
2 mm
117.2 x 20
65 000 N
5000 min.
-1
120 BZ
120
240
61
3
± 1.0
+ 1.3
5 mm
150
x 18
70 000 N
3200 min.
-1
125 BZ/BZG/HSW
127
250
67
4
± 1.0
+ 2.5
6 mm
167
x 18
70 000 N
3200 min.
-1
140 BZ
140
265
63
5
± 1.0
+ 1.3
7 mm
166
x 18
100 000 N
3200 min.
-1
160 BZ
160
290
63
5
± 1.0
+ 1.3
7 mm
210
x 12
100 000 N
3200 min.
-1
* Data only applies if the standard clamping head version is used.
SPANNTOP chuck . Numbers and facts
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The clamping head
Standard
[in stock]
Special profile clamping
possibilities
■ rigid hardened segments
made of chromium-nickel steel
■ all function surfaces are
ground in one operation
■ through continuous research
and development our vulcanizing process satisfies new
market requirements
Modified lead-in-chamfer for
square and hexagon bars
Standard versions
Clamping of raw
material
BZI
Serrated with gear
tooth system
Clamping of finished
material
BZIG
With smooth clamping surface
for clamping on previously
processed surfaces
Special versions
F
Fine tooth serration for
increased grip, e.g. for
drawn material
12
The clamping head
Z
Rough tooth serration for
increased grip. e.g. for
rolled material
Machinable to size
HSW
Machining of the
clamping bore to size
loading ring
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Clamping head change-over
Set-up for ø 60 mm
Remove clamping head
Clean
Insert clamping head
Set-up for ø 65 mm
Our convenient changing fixtures let
you change clamping heads in a flash.
1. Manual changes
The manually actuated EasyGrip MQ
changing fixture is the simplest
change-over method.
EasyGrip MQQ is especially designed
for applications where workspace is
tight.
2. Pneumatic changing unit
The pneumatically actuated PP changing fixture is absolutely convenient with
its comfortable handle and integrated
valve button.
chuck
clamping head
changing fixture
The PPG pneumatic changing fixture
has 2 additional handles.
Note: Changing fixtures can be used
for any clamping diameter for the relevant clamping head size, regardless of
clamping diameter.
MQ
MQQ
PP
PPG
Clamping head change-over
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MANDO Adapt. Mandrel-in-SPANNTOP-chuck
set-up without alignment
0
This mandrel-in-chuck offers convincing performance,
long-lasting power, and unusual speed. It is unsurpassed by any jaw chuck. In terms of the time savings offered by the MANDO Adapt, they do not even
come close. A top-class internal clamping fixture.
The advantages
■ change from O.D. clamping to I.D. clamping in
less than 2 minutes – without taking the chuck off
the machine
■ high attainable concentricity without alignment
[< 0.005 mm]
■ five different mandrel sizes – each available for
chuck sizes 42 – 100
1
2
3
4
42
52
65
80
100
42
52
65
80
100
42
52
65
80
100
65
80
100
65
80
100
ø
ø
ø
ø
ø
ø
ø
ø
ø
ø
ø
ø
ø
ø
ø
ø
ø
ø
ø
ø
ø
20
20
20
20
20
26
26
26
26
26
36
36
36
36
36
50
50
50
70
70
70
-
28
28
28
28
28
38
38
38
38
38
54
54
54
54
54
80
80
80
100
100
100
Span [mm]
of the mandrel
[mm]
Clamping range
Chuck size
Mandrel size
draw bolt
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.35
0.35
0.35
0.40
0.40
0.40
Fast and easy change-over
Remove clamping head
Install MANDO Adapt
Mount segment bushing
Mount MANDO Adapt on the front side of the SPANNTOP
chuck and you are ready to go. The mandrel is then adapted
with < 0.005 mm runout. When the draw bolt that is needed
14
MANDO Adapt . Mandrel-in-SPANNTOP-chuck
Screw in draw-bolt
Mount the end-stop blank
for the actuation of the segmented bushing is screwed on, a
slick mechanism will spread and adapt to the coupling that
normally grabs the clamping head.
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Jaw adapter. Jaw-clamping-in-SPANNTOP-chuck
block jaws for
machining
hexagon socket wrench
base end-stop
Chuck size
Now you can also clamp in front of the chuck with
the SPANNTOP combi pull-back with axial bolted
base end-stop and the jaw adapter. A combination that
opens completely new possibilities that previously
needed another jaw chuck.
65
Attainable concentric precision at 35 kN measured
50 mm from the front edge
of the jaw [in addition to
the concentricity of the
main clamping unit]
The advantages
■ clamp in front of the chuck – without a second
clamping setup
■ significantly larger clamping diameters can be
realized
■ drilling or milling in-between the jaws
■ chuck jaw with serration, clamping diameter adjustable by 6 mm
80
0.03 mm
0.03 mm
Max. permissible jaw
machining depth on the jaws
20 mm
20 mm
Max. permissible jaw machining diameter on the jaws
120 mm
133 mm
Swing dia. over bed [mm]
146 mm
146 mm
Jaw height [mm]
39.5 mm
39.5 mm
Fast and easy change-over
Remove clamping head
Install base end-stop
Insert jaw adapter
A changing fixture is not required when using the jaw adapter.
A central mounting screw pulls the support taper onto the base
end-stop, and in the process spreads the segments in the chuck
Fixed in place via the
central bolt
Jaw ready for machining
coupling. The support taper prevents the jaw adapter from
tipping and thus ensures that it retains its strong clamping
force.
Jaw adapter . Jaw-clamping-in-SPANNTOP-chuck
15
| Concept and design: ABSICHT AG www.absicht.ag | Photography: Andy Ridder www.andy-ridder.de |
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