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Transfer-MachineGemeinschaftsprojekt "Multispin" Rundtaktmaschine WMW

Transfer-Machine Gemeinschaftsprojekt "Multispin" Rundtaktmaschine WMWTransfer-Machine Gemeinschaftsprojekt "Multispin" Rundtaktmaschine WMWTransfer-Machine Gemeinschaftsprojekt "Multispin" Rundtaktmaschine WMWTransfer-Machine Gemeinschaftsprojekt "Multispin" Rundtaktmaschine WMWTransfer-Machine Gemeinschaftsprojekt "Multispin" Rundtaktmaschine WMWTransfer-Machine Gemeinschaftsprojekt "Multispin" Rundtaktmaschine WMWTransfer-Machine Gemeinschaftsprojekt "Multispin" Rundtaktmaschine WMW

Description

Research - Development - Prototyping

In our joint project with the Fraunhofer Institute, we have developed a new, more powerful spindle drive for rotary transfer machines for machining stainless steels!
The project was supported by the Sächsische Aufbaubank (SAB) with funds from the European Regional Development Fund (ERDF).

planned publications:
Metav Düsseldorf 2022
Intec Leipzig 2023

Development status:
Machine and processing units have been put into operation.
The testing of the technology is being prepared.

Compared to the Gnutti units, the new machining units have the following
design advantages:
- 1 type of machining unit instead of 2 types (drilling, tapping)
- coaxial direct drives for spindle and Z axis (innovation)
- 7 times higher spindle power (from 2.98 kW to 21 kW)
- 6 times higher speed (from 1005 min-1 to 6000 min-1)
- 1.3-fold increase in volume (from 52.2 dm³ to 67.6 dm³)
- 5.4-fold higher power density (7 / 1.3 = 5.4)
and technological advantages:
- higher torques and forces for machining stainless steel instead of brass
- freely programmable S-speed, Z-feed via CNC program
- synchronization of a spindle and feed movement via cycles
- synchronization of the 6 machining units via 6 NC channels
- water cooling of motor spindles reduces heat input into workpiece
- Internal tool cooling through spindle shaft increases tool life
- HSK tool clamping reduces service times
- No retooling of the thread copying gear in case of changed workpiece geometry

Details

Technical data
Main dimensions:
Total mass: approx. 6500 kg
length: approx. 5900 mm
width: approx. 3800 mm
height: approx. 2200 mm
Workpiece specifications:
max. workpiece length 120 mm
min. workpiece length 20 mm
max. workpiece diameter 65 mm
min. workpiece diameter 15 mm
max. workpiece thickness 10 mm
min. workpiece thickness 2 mm
Material stainless steel
Data of the plant:
Plant capacity 10 pieces / min
number of spindles 6
max. traverse range Z-axes 125 mm
type tool holder HSK80/HSK100
max. tool diameter 60 mm
min. tool diameter 3 mm
max. tool length 250 mm
min. tool length 20 mm
Electrical data
voltage 220/400 V
power 200 kW
CNC control SINUMERIK 840D sl
Manufacturer Siemens
Control voltage 24V/DC

Planned work

Improvements compared to the old version:
Conversion to CNC control and thus:
easy resetting (workpiece setup adjustments)
Adaptability of machining processes
simple, faster operation
Increased cutting and drilling performance
Adaptation to all common tool holders
Reduction of space and weight
up to 35% energy saving

Work performed

Compared to the Gnutti units, the new machining units have the following
design advantages:
- 1 type of machining unit instead of 2 types (drilling, tapping)
- coaxial direct drives for spindle and Z-axis (innovation)
- 7 times higher spindle power (from 2.98 kW to 21 kW)
- 6 times higher speed (from 1005 min-1 to 6000 min-1)
- 1.3-fold increase in volume (from 52.2 dm³ to 67.6 dm³)
- 5.4-fold higher power density (7 / 1.3 = 5.4)
and technological advantages:
- higher torques and forces for machining stainless steel instead of brass
- freely programmable S-speed, Z-feed via CNC program
- synchronization of a spindle and feed movement via cycles
- synchronization of the 6 machining units via 6 NC channels
- water cooling of motor spindles reduces heat input into workpiece
- Internal tool cooling through spindle shaft increases tool life
- HSK tool clamping reduces service times
- No retooling of the thread copying gear in case of changed workpiece geometry

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