What is External Thread
- Usage: Machining external thread parts such as screws, worm rods, plug gauges, etc., widely used in measuring tool manufacturing, machinery, automobiles, aerospace fields.
- Materials: high-speed steel, carbide, superalloys, etc. (high hardness and wear resistance are required).
- Geometric characteristics: The threaded raceway requires high accuracy, the cross-sectional shape is diverse (triangle, trapezoidal, etc.), and the multi-head thread needs to be highly synchronized.
- Common risks: Insufficient accuracy leads to inspection errors, rough surfaces affecting wear resistance, and multi-head threading is out of sync.
External Thread Grinding Core Pain Point
There are three major problems in traditional grinding machines: (1) insufficient accuracy (Ra≥0.6μm) → plug gauge scrap rate of 12%+; (2) Low efficiency→ single piece processing time 2h + delay order; (3) Slow changeover→ 30min/time cannot adapt to small batches and multiple varieties; (4) High maintenance costs → frequent replacement of wearing parts.
External Thread Grinding Process
Threaded raceway grinding:
- Key parameters: grinding wheel speed 0-4500r/min, workpiece speed 0-200r/min, C-Z axis linkage;
- Process: Rough grinding (feed 0.01mm), semi-fine grinding (0.005mm), and fine grinding (≤0.002mm) three times to ensure accuracy;
- Equipment: GS200 is equipped with Siemens 828D system + Heidenhain grating for real-time closed-loop control.
Automatic Grinding Wheel Correction:
- Trimming spindle speed up to 10000r/min, automatically correcting the cross-sectional shape of the grinding wheel (triangle/trapezoidal, etc.) to ensure the accuracy of the thread profile;
- Equipment: Veuve Veuve trimming spindle + high-precision encoder.
Multi-Head Threading:
- High-precision C-axis support, multi-head thread synchronization error ≤ 0.001mm, meeting the stringent requirements of aerospace;
- Equipment: Jinjia workpiece spindle + national measurement time grid encoder.
GS200 CNC External Thread Grinding Machine
GS200 CNC External Thread Grinder is a high-precision, high-efficiency professional thread processing equipment for grinding external thread parts such as screw rods, worms and plug gauges, with ±0.002mm tolerance control and multi-process automatic machining.
External Thread Grinding Earnings Data
| Indicator | Traditional Grinder | GS200 | Improvement Range |
|---|---|---|---|
| Surface Roughness Ra | ≥0.6μm | ≤0.32μm | Over 50% |
| Tolerance Control | ±0.005mm | ±0.002mm | 60% |
| Scrap Rate | Over 12% | Below 8% | Over 30% |
| Single Part Processing Time | 2h | 1h | 50% |
| Changeover Time | 30min | 12min | 60% |
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