GB/T 28217-2025 in English
VALIDLens edgers
- Issued on:2025-05-30
- Implemented on:2025-12-01
- File Format:PDF
- Delivery:Within 1 day
$163.00
| Standard No: | GB/T 28217-2025 |
| Document status: | VALID |
| Title in English: | Lens edgers |
| Title in Chinese: | 眼镜片磨边机 |
| Language: | English |
| File Format: | Electronic (PDF) |
| Delivery: | Within 1 day |
| Issued on: | 2025-05-30 |
| Implemented on: | 2025-12-01 |
| Superseding: |
GB/T 28217-2011 Lens edger
|
| ICS Classification: | 11.040.70-Ophthalmic equipment |
| Chinese Classification: | Y89-Other daily necessaries |
| Professional Classification: | GB-National Standard |
| Related Topics: | Glasses
lens lens pre-grinder edge slide spectacle lenses |
《GB/T 28217-2025眼镜片磨边机》由TC596（全国眼视光标准化技术委员会）归口，TC596SC1（全国眼视光标准化技术委员会眼科光学分会）执行，主管部门为中国轻工业联合会。
Introduction
Core changes in the standard revision
| Technical indicators | Requirements for the 2011 version | Requirements for the 2025 version | Improvement range |
|---|---|---|---|
| Lens shape dimension error | Unspecified value | ≤0.1mm | Quantitative standard |
| Shape similarity deviation | Ungraded | Major/minor axis≤0.5mm | Increase axial control |
| Environmental adaptability | Not required | GB/T14710Ⅱ Group | New Items |
Analysis of Key Technical Requirements
4.2.1 Lens Chamfering Process
The new standard changes the "chamfer edge curvature" into a comprehensive requirement. The template-type edge grinding machine needs to ensure that the roundness R value of the chamfered edge is ≥0.2mm, and the template-free edge grinding machine needs to verify the continuity through the CCD detection system.
4.2.6 Scanning function accuracy
Mandatory requirements for smart devices:
- Dimensional deviation ≤0.1mm (equivalent to the center thickness tolerance of Category 5 lenses)
- Axis deviation ≤1° (corresponding to 1/30 of the astigmatism axis tolerance)
Equipment type performance comparison
Template-type edge grinding machines still maintain a shape repeatability accuracy of ±0.08mm in batch processing, while template-free edge grinding machines can achieve the following in personalized customization scenarios:
- Scanning-processing closed-loop control time <3 minutes
- Support automatic path planning for special-shaped frames
Implementation suggestions
Manufacturing enterprises
Key points to be upgraded:
- Add a grinding door interlock device (4.4.3)
- Configure an environmental monitoring module (temperature and humidity influence compensation)
Testing agency
Should be equipped with:
- 0.01mm resolution image measuring instrument
- High-pressure tester in accordance with GB4793
Standard evolution analysis
This revision reflects three major trends:
- Transition from mechanical precision to system precision (new reference point deviation control)
- Strengthen human-computer interaction safety (door locking, electrical protection)
- Introduce the concept of full life cycle management (digital maintenance)
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