NSH Group - Efficient Machining of Stator/Inner Housings (Cooling Jackets) for E‑Mobility

Newly-developed, patented process for efficient simultaneous machining of stator housings (inner housing, cooling jacket, coolin sleeve, motor housing) for E‑Mobility
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Website: www.nshgroup.com/
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- Semi-finishing up to 8 times faster
- Efficiency increase of up to 100 % compared to conventional turning process
- Compact Machine Mounting due to Vertical Machining
Innovation
- Serial production solution for efficient ID and OD machining of pot-shaped stator housings by means of a simultaneous turning process
- Substitution of separate OD turning processes (roughing) by an integrated process of ID and OD machining
- Significant reduction in machining time
- Increase in economic efficiency
Workpiece
- Pot-shaped stator housings of e‑mobility with inner and outer contour
- High requirements for form and position tolerances
- Fit tolerances IT6
- Cylinder shapes between 20 and 30 µm
- High requirements for concentricity up to 0.05mm
Process Setup
- Multi-spindle turning center with tool turret
- Vertical test setup
Expansion stages for serial production:
- Integration of further machining units through modular design
- Automatic loading and unloading of workpieces via pick-up
- Integration of in-process measuring equipment
Simultaneously Semi-Finish-Machining
- Use of special internal boring tools and self-developed external bell tools, which enable machining of the inner and outer contour in parallel
- Vibration-damped machining on the thin-walled workpiece through simultaneous operation of the inner and outer tools
- Simultaneous rotary movement of workpiece and inner tool with stationary outer tool
- Up to 8 times faster machining for the internal and external roughing processes due to simultaneous machining and higher number of cutting edges (4‑fold cutting edges)
- Lower torque on the clamping device due to counter-rotating cutting forces of internal and external machining (compared to single internal machining)
- Automated parts handling (pick-up)
- Reduced re-clamping processes
Benefits
- Simultaneous ID and OD machining of pot-shaped stator housings
- Substitution of separate OD machining processes (roughing)
- Reduction of cycle time: Semi-finishing up to 8 times faster compared to conventional turning processes
- Less re-clamping operations
- Efficiency increase of up to 100 % compared to conventional turning process
- Increase in economic efficiency
- Reduction of vibrations in the process
Other Fields of Application
- Workpiece spectrum with tube and pot-shaped geometry e.g.
- E‑mobility stator housings
- Aluminum castings
- Heat sinks for hybrid engines
- Tube-flange couplings for the oil and gas industry
- Bearing and housing components for general mechanical engineering
- Workpieces for the plastics industry