The MAPAL tool programme for series production of scroll compressors.

Dispositifs auxiliaires électriques

En raison de l'électrification dans l'industrie automobile, de plus en plus de tâches dans l'entraînement des moteurs à combustion sont également prises en charge par des composants électriques. En électrifiant les dispositifs auxiliaires, ces composants peuvent être utilisés en fonction des besoins et de la charge, contribuant ainsi à réduire la consommation d'énergie. Ils se caractérisent par une grande fiabilité et de faibles émissions sonores ainsi qu'une excellente efficacité énergétique.

Auxiliary unit scroll compressor

An example of an electrified auxiliary unit is the scroll compressor, which is used as an electric refrigerant compressor in thermal management. Three specific machining operations on an aluminium scroll compressor for use in an electrified vehicle are presented as examples.
Sectional view of scroll compressor

FEATURES

  • Core pieces orbit and fixed scroll
  • Geometric accuracy and connection is paramount
  • Exact positioning of the spirals to each other

MACHINING REQUIREMENTS

  • High degree of shape accuracy of the spirals (≤ 20 μm)
  • High perpendicularity of flanks to base surface (≤ 20 μm)
  • Parallel alignment and flatness of ≤ 10 μm
  • Surface roughness (Rz) in the single-digit range
  • Perfect interaction between machine and tool

Processing steps on the auxiliary unit scroll compressor:

  • The combination tool finishes the recesses for the sealing grooves.

    Recesses for sealing elements

    • Pre-machining and finish machining of the recesses is carried out with double-edged PCD boring tools
    • Combination tool enables the machining of the connection bore
    • Distribution of the cut reduces cutting forces and ensures optimal chip formation

  • The boring tool with two stages machines the bearing bore of the scroll compressor.

    Precise bearing bore

    • Pre-machining is carried out by circular milling with a triple-fluted PCD milling cutter
    • Finish machining with double edge PCD boring tool with two stages and distribution of the cut to reduce the cutting forces

  • Machining of the high-precision spiral shapes with a milling cutter made of solid carbide.

    High precision spiral shapes

    • Pre-machining and finish machining with solid carbide milling cutters
    • Extremely sharp cutting edges ensure high dimensional accuracy

Your direct contact

Michael Kucher from the Component Management E-Mobility at MAPAL.

Contact person

Michael Kucher Component Manager E-Mobility michael.kucher@mapal.com +49 7361 585 3557

Other electrified components