Motor-Spindle Safety System MS3 - JAKOB Antriebstechnik

Motor-Spindle
Safety System MS 3

Motor-Spindle Safety System MS 3
Overload and Collision Protection
Collision Protection
In milling machine tools, enormous impact forces act on
the motor-spindle in case of tool collision with high feed
rates. Five-figure (Euro) servicing and repair costs are
common after a collision. The newly developed JAKOB
motor-spindle safety system disconnects power transmission
immediately at the interface between spindle box
and motor-spindle in case of collision-caused overload.
Therefore the shock-prone components of the motorspindle
are effectively protected from high force peaks.
Safety Solution for Motor-Spindles
Field of Application
Protective element for machine tools in which components of the motor-spindle such as bearings, shaft,
clamping system and transducer need to be protected from collision and overload-caused damages.
Description of Function
Overload protection in case of collision through all-round protection of the motor-spindle with subsequent repositioning.
Automatic disconnection in case of exceeding holding forces. The deflection of the motor-spindle
can, depending on the type of collision, either happen through disengagement or pivoting in case of axial
or radial collision, respectively. During the subsequent clearing of the motor-spindle after collision, the safety
system is restored back to its initial center position precisely through springs and a self-centering separator .
Operating Principle
+ Permanent magnets integrated into the seperator for high holding forces and stiffness
+ Springs and shock absorbers for automatic repositioning and impact absorption
+ Interlocking double-flange system for high precision of reengagement
www.jakobantriebstechnik.de

All-round Protection
1 2 3
stroke h
swivel
angle
a
1
2
3
milling process: safety system remains in initial center position, not deflected.
axial tool collision: safety system disengages by stroke s.
radial tool collision: safety system swivels out by angle a.
System Design
machine tool flange
sealing
magnetic system
shock absorbers
spring elements
spindle flange
System advantages
+ energy-autarkic
+ high precision of reengagement
+ high holding force limit and stiffness
+ quicker to react than mere electrical
process monitoring systems
+ absorption of kinetic impact energy
+ integrated sensor query of deflection
+ increase of machine availibility
+ costumizable for common motor-spindle geometries
+ automatic reset
+ maintenance-free
sensor cables of
proximity switch
center pin
cover panel

Motor-Spindle Safety System MS 3
Ø AD
H
A B
Ø MSP
C
Ø AP
Technical Data
Parameter Symbol Unit Dimensions
tool interface HSK/SK [-] 63/40 100
outer diameter of motor-spindle Ø MSP [mm] 230 280
outer diameter of headstock Ø AP [mm] 315 370
outer diameter of flange Ø AD [mm] 335 400
length A [mm] 66 66
length B [mm] 68 68
length C [mm] 43 43
height H [mm] 135 135
axial force limit F GA [kN} 12 - 17 16 - 20
torque limit M G [kNm] 1,6 - 1,8 2,4 - 2,6
weight m [kg] 22 30
swivel angle α [°] 4 4
stroke h [mm] 20 20
* subject to change, application-specific draft on demand
Daimler Ring 42, Industriegebiet
DE-63839 Kleinwallstadt
Telefon +49(0)6022 2208-0
Telefax +49(0)6022 2208-22
www.jakobantriebstechnik.de
info@jakobantriebstechnik.de