What is High Precision External Ball Screw
Usage: The ball screw is the core transmission component that turns the rotary motion into linear motion, and is widely used in CNC machine tools, industrial robots, and automated production lines, responsible for the precise movement and power transmission of the coordinate axis.
Material/geometric features:
- Material: High-strength metals such as bearing steel (SUJ2) and alloy steel
- Structure: Arc/trapezoidal threaded tooth, long stroke (up to 14 meters), precision tolerance (≤0.006mm)
- Size: Diameter Φ20-300mm, Length ≤ 14 meters
Common Risks: - Machining problems: deformation, cracks, surface burns, tooth profile accuracy is out of order
- Limitations of traditional processes: long-stroke grinding accuracy is difficult to control, and small batch changeovers take a long time
High Precision External Ball Screw Grinding Core Pain Point
Pain point 1: Insufficient grinding accuracy of long-stroke screws
- Efficiency: 20% longer production cycle
- Cost: The rework cost increases by 500 yuan/piece
- Quality: 12% scrap rate
Pain point 2: Small batch customization is time-consuming
- Efficiency: changeover time ≥ 30 minutes/batch
- Cost: The cost of manual adjustment increases by 200 yuan/batch
- Quality: 8% tooth shape error rate
Pain point 3: Frequent downtime for equipment maintenance
- Efficiency: 8 hours of downtime per month
- Cost: The maintenance cost increases by 1500 yuan/month
- Quality: Poor batch consistency (7% defect rate)
High Precision External Ball Screw Grinding Process
Complete link: blank preparation→ roughing machining→ CGK-4000 high-precision grinding (core link), →surface treatment→ quality inspection
The CGK-4000 plays a key role in the grinding process: precise grinding of threaded tooth profiles is achieved by means of a wheel frame moving structure + Siemens system control. Connection of each link: rough machining removal allowance→ CGK-4000 ensures accuracy→ surface treatment anti-rust → detection and verification (dynamic accuracy ≤ 0.006mm).
CGK-4000 grinding link:
- Specific method: The wheel frame mobile structure is adopted, and the Siemens 828D CNC system is programmed and controlled to achieve arc/trapezoidal thread tooth grinding
- Parameter range:
- Grinding wheel spindle speed: 1000-3000rpm
- Table movement speed: 0-6.0m/min
- Pitch Range: 1.5-48mm (Meric), 2 1/1″-18 1″/Tooth (Imperial)
- Risk and control:
- Surface burn: using Qinchuan cutting fluid filtration system (magnetic separation + paper tape filtration) + high-pressure cooling
- Accuracy Difference: Real-time positioning of Heidenhain grating, resolution of 0.001mm
- Key equipment: CGK-4000 grinding machine, Siemens servo drive system
Quality inspection link: - Specific method: CMM + dynamic accuracy test
- Parameters: Detection accuracy within 2π radians≤ 0.006mm, any 300mm within ≤ 0.012mm
- Risk Control: 10% sampling per batch to ensure consistency
- Equipment: CMM
CGK-4000 High-precision Screw Grinding Machine
High Precision External Ball Screw Grinding Earnings Data
| Indicator | Traditional Equipment | CGK-4000 | Improvement Range |
|---|---|---|---|
| Dynamic Accuracy | ≤0.015mm/2π rad | ≤0.006mm/2π rad | +60% |
| Production Efficiency | 30 pcs/day | 40 pcs/day | +35% |
| Scrap Rate | 12% | 3% | -75% |
| Maintenance Cost | ¥1000/month | ¥800/month | -20% |
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