What is RV Gear
Usage: Precision grinding of core parts of RV reducers (cycloidal wheels, needle tooth shells, planetary frames), used in industrial robot joints, automatic equipment transmission systems, new energy vehicle chassis and other fields; It assumes the core role of “transmission accuracy guarantee” in the product.
Material/geometric characteristics: The material is mainly alloy steel and bearing steel; complex structure (thin wall<5mm, complex cycloidal surface, eccentric hole); Small and medium-sized size (diameter 200-320mm), tolerance requirement ±0.005mm.
Common risks: Traditional multi-process processing can easily lead to coaxiality deviation (≥0.01mm) and surface burns; Traditional equipment needs to be clamped multiple times, positioning errors accumulate, and the scrap rate reaches 15%.
RV Gear Grinding Core Pain Point
Pain point 1: Multiple clamping leads to coaxiality deviation
- Efficiency: 40% longer production cycle time (15 minutes/piece per clamping adjustment)
- Cost: The rework cost increases by 500 yuan/piece
- Quality: 15% defective rate
Pain point 2: Insufficient precision in grinding complex surfaces - Efficiency: Commissioning time increased by 2 hours/batch
- Cost: 30% increase in tool loss
- Quality: 10% scrap rate
Pain point 3: High maintenance cost of traditional equipment - Efficiency: 10 hours of downtime per month (breakdown repairs)
- Cost: The maintenance cost is 20,000 yuan per month
- Quality: 8% defect rate due to equipment failure
RV Gear Grinding Process
Complete link: blank preparation→ roughing→VMK324A compound grinding (core link), →surface treatment→ quality inspection.
VMK324A replace the traditional “cylindrical grinding + internal hole grinding + contour grinding” multi-equipment process, and complete key processing such as external cycloidal contours and eccentric holes in one clamping, eliminating the accumulation of positioning errors. The connection of each link: the blank is directly VMK324A after rough processing, and after processing, it enters the surface treatment (such as polishing), and finally meets the standard through three-coordinate testing.
- Specific method: The workpiece is clamped by the chicken heart fixture, first start the outer cycloidal spindle grinding the outer cycloidal contour, and then switch the inner hole spindle to process the eccentric hole, and the whole process is completed automatically.
- Parameter range: outer cylindrical spindle speed 1000-3500rpm, inner bore spindle speed 50-200rpm, feed 0.01-0.05mm/r, corrected spindle speed 10000rpm.
- Risk and control:
- Surface burn: enable high-pressure cutting fluid filtration system (magnetic separator + filter paper filtration), feed ≤ 0.03mm/r;
- Coaxiality Out-of-Condition: Real-time positioning compensation through HEIDENHAIN grating scales ensures X/Z axis accuracy.
- Key equipment: VMK324A CNC center (Siemens 828D CNC system), diamond roller dresser.
VMK324A CNC RV Gear Grinding Machine
VMK324A CNC RV Gear Grinding Center is a precision multi-process machine for RV reducer core parts, integrating external and internal grinding spindles to finish cycloidal profiles and eccentric holes in one clamping. Equipped with Siemens 828D and Heidenhain linear scale, it meets high-precision demands of robotic joints and automated drive systems, cutting production cycle and scrap rate significantly.
RV Gear Grinding Earnings Data
| Indicator | Traditional Process | VMK324A | Improvement Range |
|---|---|---|---|
| Production Cycle | 30min/piece | 15min/piece | 50%↓ |
| Machining Precision | ±0.01mm | ±0.005mm | 50%↑ |
| Scrap Rate | 15% | 5% | 10%↓ |
| Unit Cost | ¥120 | ¥80 | 33%↓ |
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