What is External Thread
Usage: Threaded components such as plug gauges, screws, and worm rods are the core components of machinery manufacturing and measuring tool testing, and are widely used in automotive, aerospace, and measuring tool production fields to ensure thread connection accuracy and interchangeability.
Material/geometric features:
- Material: Stainless steel, alloy tool steel (such as Cr12MoV)
- Structure: Precision thread (lead error ≤0.002mm), thin-walled/complex surface (e.g. worm spiral surface)
- Size: Small (Diameter Φ4-Φ100mm), High Precision Tolerance (±0.001mm)
c) Common Risks: - Machining risks: deformation (thin-walled parts), surface roughness exceeding the standard (Ra>0.32μm), thread pattern error
- Limitations of traditional processes: large clamping errors in multiple processes, low accuracy in manually adjusting the spiral angle, and insufficient efficiency
External Thread Grinding Core Pain Point
Pain point 1: Insufficient accuracy leads to high scrap rate
- Efficiency impact: 20% increase in rework and 15% increase in production cycle
- Cost impact: Each batch (100 pieces) increases the rework cost by 5,000 yuan
- Quality impact: up to 15% scrap rate
Pain point 2: Multi-process clamping error is large - Efficiency impact: 30% of clamping time, 40% longer processing time per piece
- Cost impact: The cost of manual clamping increases by 30 yuan/piece
- Quality impact: Thread coaxiality error exceeds ±0.005mm
Pain point 3: Low efficiency of spiral angle adjustment - Efficiency Impact: Manual adjustment takes 30 minutes/piece, and mass production delays orders
- Cost impact: 25% increase in equipment idle rate
- Quality Impact: Helix angle error ± 0.5°, resulting in parts not being assembled
External Thread Grinding Process
Complete processing link: blank preparation→ rough grinding→ semi-fine grinding→ fine grinding→ surface treatment→ quality inspection
The core position of GS100: covers the whole process from rough grinding to fine grinding, and realizes “all grinding processes in one clamping” through CNC automation.
Link connection:
- Blank: Alloy tool steel that has been quenched and tempered
- Rough grinding: quick removal of allowance (GS100 grinding wheel spindle high speed)
- Semi-fine grinding: correction of shape error (C-Z axis linkage)
- Fine grinding: ensure high precision (grating feedback closed-loop control)
- Surface treatment: deburring + rust prevention
- Quality inspection: coordinate measurement of thread accuracy
Rough grinding link
- Specific method: Use a diamond grinding wheel to feed along the thread axis + synchronous rotation of the workpiece (C-Z linkage)
- Parameter range: grinding wheel speed 2000-3000rpm, feed rate 0.01mm/r, cutting depth 0.05mm
- Risks and controls: surface burns→ high-pressure cooling system (Qinchuan cutting fluid filtration); Deformation → constant temperature workshop (±2°C)
- Key equipment: GS100 CNC male thread grinder, diamond grinding wheel
Semi-precision grinding link - Specific method: After the grinding wheel is trimmed, reduce the feed and correct the thread pattern
- Parameter range: grinding wheel speed 3000-4000rpm, feed rate 0.005mm/r, cutting depth 0.02mm
- Risk and control: Tooth shape errors → real-time compensation of Siemens 828D systems; Vibration → THK rail shock absorption
- Key equipment: GS100 (grating feedback), grinding wheel dresser
Fine grinding link - Specific method: Closed-loop control of feed volume to ensure thread accuracy
- Parameter range: grinding wheel speed 4000-4500rpm, feed ≤ 0.002mm/r, cutting depth 0.005mm
- Risk and control: tolerance over-deviation → HEIDENHAIN grating feedback (±0.001mm); Surface roughness → low-speed fine grinding + cooling
- Key equipment: GS100 (high-precision C-axis), coordinate measuring instrument
Quality inspection link - Specific method: Inspect thread leads, tooth angles, and surface roughness
- Parameter range: Ra≤0.32μm, tolerance ±0.001mm
- Risk and control: detect errors → calibrate the instrument regularly; Missed detection → AI vision-assisted detection
- Key equipment: coordinate measuring instrument, AI visual inspection system
GS100 CNC External Thread Grinding Machine
GS100 CNC External Thread Grinding Machine features high precision with Φ4–Φ100 grindable diameter, ±25° helix angle and Siemens 828D system. It delivers superior thread finish for automotive, aerospace and precision manufacturing industries.
External Thread Grinding Earnings Data
| Indicator | Traditional Process | GS100 Solution | Improvement Range |
|---|---|---|---|
| Defect Rate | 15% | 4% | -73% |
| Production Cycle (100 pcs) | 2 days | 1 day | -50% |
| Labor Cost (100 pcs) | ¥5000 | ¥3500 | -30% |
| Thread Tolerance | ±0.005 mm | ±0.001 mm | +80% Accuracy |
Contact us for further consultation on cooperation details or customized solutions. We look forward to partnering with you to create mutual value!