What is Ball Screw
Planetary roller screws are the core components of heavy-duty robot joints (palletizing/handling robot lifting arms) and precision machine tool feed systems, which need to withstand high loads and high-frequency reciprocating motion. The commonly used materials are superalloy (Inconel718), titanium alloy (TC4), and high-strength steel (42CrMo), and the geometric characteristics include high precision requirements for spiral raceways and complex multi-roller contact structure. Common risks: processing deformation, raceway surface roughness not up to standard, cooling hole position deviation.
Ball Screw Thread Whirling Core Pain Point
- High hardness of superalloy (HRC45-55), high cutting force leads to low efficiency (1 piece per day in traditional process);
- The geometry is complex and the accuracy is difficult to control, and the scrap rate is as high as 8%;
- The traditional process cycle is 7 days, which cannot meet the fast delivery of orders;
- High maintenance cost and slow service response (average 72 hours to door-to-door).
Ball Screw Thread Whirling Process
Blanks (forgings/castings) → roughing→ finishing→ cooling hole machining→ surface treatment→ inspection
Key points of the sub-link
- Blank treatment: select forgings and anneal to eliminate residual stress to avoid subsequent processing deformation; Key equipment: annealing furnace.
- Rough machining: MX3000-N150 cyclone milling rough milling raceway, parameters: cutting speed 150m/min, feed rate 0.2mm/r; Risk control: The wall-mounted bed structure has high torsional strength and reduces vibration.
- Finishing: precision cyclone milling finish milling raceway, parameters: cutting speed 200m/min, feed rate 0.1mm/r; Key equipment: MX3000-N150 direct drive C-axis (positioning accuracy ± 3 arcseconds) to ensure rotation accuracy.
- Cooling hole processing: laser punching diameter 0.5mm, position tolerance ±0.1mm; Key equipment: fiber laser hole punching machine.
- Surface treatment: Polishing to Ra≤0.4μm to improve wear resistance; Key equipment: precision polishing machine.
- Testing: CMM detects raceway roundness, cylindricality, and position; Key equipment: ZEISS coordinate measuring instrument.
MX3000-N150 External Screw Whirling Machine
MX3000-N150 External Screw Whirling Machine adopts Siemens 828D control system and THK lead screws, delivering high-precision external thread machining with 7.5kW cyclone milling head power for efficient industrial screw production.
Ball Screw Thread Whirling Earnings Data
| Indicators | Traditional Process | MX3000-N150 Process |
|---|---|---|
| Tolerance | ±0.01mm | ±0.005mm |
| Surface Roughness (Ra) | ≥1.6μm | ≤0.4μm |
| Processing Efficiency | 1 pc/day | 2 pcs/day |
| Defect Rate | 8% | 1% |
| Tool Life | 50 hours | 65 hours |
| Unit Cost | ¥1000 | ¥750 |
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