Tubes for monoblock drive shafts

Jansen produces weld-drawn tubes made of high-tensile materials for single-part drive shafts in automotive engineering. As a rule, tubes are cold-formed in production. For this reason, manufacturers of monoblock drive shafts greatly value identical reshaping properties and high levels of dimensional stability in terms of processed tubes. Additionally, inductive hardening triggers high strength and simultaneously low levels of surface decarburisation. The tendency to light-weight design increasingly demands for materials with higher strength (> 34 MnB4), bringing about weight reductions while achieving comparable, physical properties.

Requirements

  • Excellent ductility
  • High torsional strength and durability
  • Excellent hardening properties
  • High levels of geometrical accuracy (eccentricity, roundness)
  • Excellent surface-finish condition

Material properties

  • High torsional strength and fatigue strength
  • Excellent reforming properties
  • Homogeneous strength properties and ductility
  • Excellent hardening properties
  • Potential to reduce wall thickness

Structure

  • Homogeneous, fine-grain structure (weld seam and basic material)
  • Minimised surface decarburisation of inner and outer surfaces (< 100 µm, < 50 µm)
  • Excellent weld seam quality
  • Excellent reforming properties

Geometry

  • Minimised fluctuations in wall thickness and inner/outer diameter
  • Minimised deviations in roundness and linear movement
  • Minimised eccentricity
  • Specific tube end processing: sawn/brushed; chamfered

Surface

  • Excellent surface condition thanks to tube drawing
  • Minimised surface irregularities (adhesions, scratches, dents, etc.)
  • Minimised corrosion protection, optionally specific corrosion protection
Tubes for monoblock drive shafts