Tubes for camshafts in hydroforming

Jansen produces weld-drawn tubes with high levels of accuracy made of modified C-grade steel for internal high-pressure reshaped camshafts. Accurate concentricity, high degrees of roundness and straightness as well as identical reshaping properties are paramount elements in terms of pipe selection for hydroforming camshaft producers.  These criteria guarantee ideal tube processing on production systems as well as smooth operation of installed camshafts in engines.

Requirements

  • Excellent ductility
  • High torsional strength and durability
  • High geometrical accuracy
  • Excellent surface-finish condition
  • High levels of strength and hardness as per Q+T

Material properties

  • Homogeneous strength and ductility
  • High levels of tensile strength
  • Potential for reduced wall thickness

Structure

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

Geometry

  • Minimised fluctuation in wall thickness and diameter across the entire circumference and length
  • Tube end processing: sawn/brushed; chamfered
  • High accuracy in tube end processing (chamfer geometry)

Surface

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