Acetabular cup

1. Precision machining of hemispherical inner cavity

Scenario pain points:

The spherical surface of the inner cavity of the acetabular cup (R25-R60mm) requires a roundness of ≤ 0.005mm, and the traditional processing is prone to residual vibration (Ra>0.2μm).

 

solution：

Tool technology: diamond-coated ball head milling cutter (R2-R10mm) + five-axis linkage dynamic compensation system.

Technical parameters: Spherical roundness ≤0.003mm, surface roughness Ra0.05μm, and the processing time of a single piece is shortened to 50 minutes.

Application case: Titanium alloy acetabular cup processing, adapted to ISO 21534 joint surface fit standard, wear rate reduced by 40%.

 

2. Osseointegration processing of porous surfaces

Scene pain points：

The 3D porous structure on the outer surface (pore diameter 200-600μm) needs to be evenly distributed, and traditional drilling is easy to block the hole and burr exceeds the standard.

 

solution：

Tool technology: carbide micro diameter drill bit (Φ0.2mm) + ultrasonic vibration assisted chip removal (frequency 40kHz).

Technical parameters: porosity 65%±2%, hole wall roughness Ra0.6μm, processing efficiency increased by 60%.

Application case: Cobalt-chromium-molybdenum alloy acetabular cup porous layer processing, osteocyte adhesion increased by 30%, passed ISO 10993-5 cytotoxicity test.

 

3. Efficient cutting of high-hardness materials

Scene pain points：

Cobalt-chromium-molybdenum alloy (HV450) machining tool life is less than 3 hours, and the cutting heat causes micro-cracks on the surface.

 

solution：

Tool technology: AlCrN nano-coated carbide end mill + low-temperature cold air system (-15°C).

Technical parameters: cutting speed 100m/min, tool life extended to 10 hours, surface residual stress < 150MPa.

Application case: Batch processing of acetabular cups, fatigue life exceeds 5 million cycles (ASTM F1612 standard).

 

4. High-precision forming of edge locking grooves

Scene pain points：

The edge locking groove (width 0.5mm±0.02mm) is easy to chip, which affects the stability of implantation.

 

solution：

Tool technology: full-thread milling cutter + negative rake angle cutting edge design, integrated vibration suppression tool holder.

Technical parameters: Groove width tolerance ±0.005mm, edge chipping rate <0.1%, processing speed 80m/min.

Application case: Ceramic-based acetabular cup processing, 25% increase in locking strength, passed ISO 7206-6 mechanical test.