I. Clarify Your Needs: Match Machine to Part Requirements
1. Part Type and Accuracy
For slender shafts (length-to-diameter >7), ensure the manufacturer’s machine supports guide bushing mode and spindle sliding accuracy (e.g., ±2μm).
For 5-axis complex surfaces (helical grooves, eccentric holes), verify their experience with 5-axis 联动 and B-axis tilt precision (±0.01°).
2. Production Volume and Efficiency
High-volume production (>1000 parts/day) requires automatic bar feeding (4m long bars) and dual-spindle synchronous machining.
Small batches need quick changeover designs (modular turrets, one-touch tool setting).
II. Evaluate Technical Strength: Avoid “Fake High-End” Claims
1. Core Component Quality
Spindles: Imported brands (NSK, FAG) are better than domestic assemblies; max speed should suit materials (e.g., >8000rpm for titanium).
Control Systems: Leading systems (FANUC, SIEMENS) offer better stability and remote diagnostics.
2. Test Data Validation
Request trial machining videos to check:
Vibration amplitude in slender shaft machining (<5μm via laser vibrometer);
Repeat positioning accuracy across 10 cycles (<±3μm deviation).
III. Verify Industry Experience: Case Studies Matter
1. Reference Cases
Ask for similar part machining examples:
Medical: Have they made <2mm titanium screws (provide third-party reports)?
3C: Can they clamp 0.1mm thin-wall parts without deformation?
2. Factory Visits
Visit customer sites instead of showrooms:
Check machine uptime (>85% is normal);
Interview customers about service response time (24-hour onsite support).
IV. After-Sales Service: Hidden Costs More Critical Than Price
1.Spare Parts and Training
Ensure 48-hour spare parts delivery (guide bushings, spindle bearings);
Free training (3+ days of hands-on operation/programming) and lifetime remote support.
V. Characteristics of Trustworthy Manufacturers
Certifications: ISO9001, participation in national machine standards;
Reputation: Over 10 years in business, >60% repeat customer rate;
Transparency: Provide machine schematics and component origin details;
Value-Added Services: Offer process optimization (cutting parameter databases) and capacity simulation software.