Artificial hip / knee joint grinding with EHWA CBN grinding wheels

Artificial hip and knee joints are an integral part of medicine today. In most cases, damaged joints are replaced by so-called endoprostheses, which are intended to enable a patient to be mobile. Causes for the use of endoprostheses can be: wear and tear of the joint cartilage, malformations, fractures, etc.

Artificial hip and knee joints are exposed to very high mechanical and chemical stresses on a daily basis, which is why they are usually made from special titanium alloys or ceramics.

EHWA has been supplying world market leaders in this industry with CBN grinding wheels and dressing rollers for many years. Special base body designs are useful depending on the application and contribute to efficient grinding operations.

EHWA_Kniegelenkschleifen

VBM | EHWA ceramic bond

Case study | External cylindrical grinding | Chrome-cobalt alloy:

  • Grinding wheel dimensions: VB-14F1, 253D-120T-51H, B181 oder B252 – Vorschliff

  • Workpiece: Artificial knee joint

  • Workpiece material: Cr + Cobalt

  • Workpiece hardness: HRC 30

  • Schleifmaschine: Haas Multigrind

  • Wheel speed: Vs = 90 m/s

  • Feed rate: Vf = 500mm/min

Dressing interval - 35% higher than the competitor:

Advantages of the EHWA CBN grinding wheel:

  • High surface quality
  • Long lifetime thanks to EHWA specification

  • Customized solutions for different workpiece materials

  • Cooperation with well-known machine manufacturers