Electrified drives

Automobile manufacturers and suppliers are facing new challenges when it comes to components for electric motors. The example of the housing of an electric motor shows how big these challenges are: Compared to a transmission housing, this has to be manufactured within significantly tighter tolerances, since the accuracy has a decisive influence on the efficiency of the motor.

In addition, due to the special structure, such as integrated cooling channels, the electric motor housing is usually significantly thinner than a transmission housing. In addition, bearing bushes made of steel materials are pressed into some of these housings. Special protection shields in the tool ensure that steel chips do not come into contact with the aluminium surfaces during processing and damage them.

Machining requirements and features of different housing types

Basic procedure for machining of stator housings

The machining process as well as the tools are designed individually depending on the
measurement situation, machine park and clamping setup. In this way, the cutting forces
applied to the component are kept as low as possible. The machining of the stator bore is divided into 3 steps: Pre-machining, Semi-finish machining and Finish machining.
Basic procedure for machining of stator housings
Stator housing external machining

External Machining stator housing

External machining of stator housings for electric motors is a demanding task. These housings, which often come in tubular or pot-shaped designs, are crucial for the efficiency of the electric motor. Several challenges have to be overcome during the process. The thin-walled aluminium housings with integrated ribs for the cooling circuit require the highest precision in terms of diameter accuracy, shape and position tolerances. The concentricity between different diameters is of huge importance.

Pre-machining
  • Helixfräser mit ISO-Wendeschneidplatten

    Helix milling cutter with ISO indexable inserts

    Roughing of outer diameter and surface

    • Coated ISO indexable inserts made of carbide or PCD-tipped indexable inserts
    • Reduced cutting forces
    • Standard product
    • HSK extension for different machining depths

  • ISO BORING TOOL Roughing of outer diameter

    ISO boring tool

    Roughing of outer diameter

    • Multi-stage bell tool for external machining
    • ISO indexable inserts

  • MILLING CUTTER WITH ISO INDEXABLE INSERTS

    Milling cutter with ISO indexable inserts

    Roughing the sealing groove

    • Coated ISO indexable inserts made of carbide
    • Optionally with vibration damper
    • Effective roughing of the sealing grooves

Finish machining
  • PCD MILLING CUTTER WITH SPECIAL CONTOUR

    Fresas PCD con contorno especial

    Acabado de las ranuras de sellado 

    • Corte de forma PCD 
    • Geometría perfecta de los contornos individuales de las ranuras 
    • Opcionalmente con amortiguador de vibraciones 
    • Mecanizado de acabado de todas las inserciones en un solo corte 

  • PCD MILLING CUTTER WITH SPECIAL CONTOUR Finishing the sealing groove

    Herramienta de taladrado de precisión en construcción ligera

    Acabado del diámetro exterior 

    • Insertos de PCD ajustables 
    • Cuerpo de la herramienta en construcción ligera 
    • Diámetro de mecanizado hasta Ø 260 mm 

Soluciones de mecanizado para…

MAPAL Basic, Performance, Expert Line

Otras soluciones de mecanizado

  • Topfförmiges Elektromotorengehäuse in CAD Darstellung

    Orificios de cojinete y posición

    Con la máxima concentricidad y circularidad

    Más información
  • Außenreibahle mit EA-System

    Escariador exterior con sistema EA

    • Mecanizado exterior del orificio de cojinete

  • Planfräser mit PKD-Fräseinsätzen

    Fresadora plana con fresas de PCD

    • Creación de perfiles de superficie definidos para superficies de junta y apoyo (por ejemplo estructuras con cortes cruzados)
    • Acabado de la superficie Rz < 1

Otros componentes electrificados