What is Worm
Usage: The worm is the core component of the transmission system, which is used to achieve precision meshing, deceleration/reversing transmission; Materials: carbon steel, alloy steel, superalloys, etc.; Geometric characteristics: complex thread tooth shape, variable lead, wide range of helix angle (+30°~-160°); Common risks: Tooth shape error leads to poor meshing, poor surface roughness shortens life, and insufficient lead accuracy causes transmission stuttering.
Worm Thread Grinding Core Pain Point
There are three major bottlenecks in traditional worm processing: (1) Insufficient precision: tooth shape error >0.01mm, scrap rate as high as 12%; (2) Inefficient: the processing cycle of a single piece > 2.5 hours; (3) High maintenance cost: the equipment is easy to wear out, and the service response delay > 72 hours.
Worm Thread Grinding Process
Blank → roughing→ finishing→ surface treatment→ quality inspection
Key points of the sub-link
Roughing:
- Method: X/Z axis linkage to quickly remove margin (X/Z fast traverse speed 8m/min);
- Parameters: Feed 0.05mm/r, cutting depth 1mm;
- Risk control: cast iron base (12 ton weight) guarantees rigidity and avoids excessive cutting deformation;
- Equipment: THK screw guide (X/Z axis), Siemens servo motor.
Finishing:
- Method: The grinding wheel moves synchronously with the workpiece (C-axis rotation + Z-axis feed), and the A-axis adjusts the grinding wheel angle to match the tooth angle;
- Parameters: grinding wheel speed 1500min-1, lead accuracy ±0.008mm;
- Risk control: Heidenhain grating (X/Z axis) ensures positioning accuracy, trimming spindle in-line trimming of the grinding wheel contour;
- Equipment: Siemens 828D CNC system, Heidenhain encoder.
Surface Treatment:
- Method: Natural cooling after precision grinding;
- Parameters: Surface roughness Ra0.4μm;
- Risk control: Oil mist absorber (Hannover) reduces environmental pollution.
Quality Inspection:
- Method: 3D coordinate measuring instrument detects tooth shape and lead;
- Parameters: Tolerance range±0.005mm;
- Risk control: Closed-loop feedback adjusts processing parameters.
SWM1507 CNC Worm Screw External Thread Grinding Machine
Worm Thread Grinding Earnings Data
| Indicator | Traditional Machining | SWM1507 | Improvement Range |
|---|---|---|---|
| Surface Finish (Ra) | 1.6μm | 0.4μm | 75% Reduction |
| Scrap Rate | 12% | 1.5% | 87.5% Reduction |
| Single Part Cycle Time | 2.5h | 1.2h | 52% Reduction |
| Lead Accuracy | ±0.02mm | ±0.008mm | 60% Improvement |
| Tool Life | 500 pcs | 1200 pcs | 140% Extension |
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