GB/T 6476-2021 in English
VALIDSurface grinding machines with vertical grinding wheel spindle and reciprocating table—Testing of the accuracy
- Issued on:2021-12-31
- Implemented on:2022-07-01
- File Format:PDF
- Delivery:Via email within 5 business days
$388.00
《GB/T 6476-2021立轴矩台平面磨床 精度检验》由TC22（全国金属切削机床标准化技术委员会）归口，TC22SC5（全国金属切削机床标准化技术委员会磨床分会）执行，主管部门为中国机械工业联合会。
Introduction
Background and main changes of the standard revision
| Revision content | 2007 edition | 2021 edition |
|---|---|---|
| Inspection items | 15 items | Newly added to 23 items (including rotation axis inspection) |
| Positioning accuracy | Not separately specified | New Chapter 7 Positioning accuracy inspection of CNC/non-CNC axes |
| Tolerance requirements | G4 tolerance 0.015/300 | Tightened to 0.01/300 |
Analysis of core inspection items
1. Geometric accuracy inspection
Typical item G8 (table flatness): Adopting flat ruler + gauge block method or optical instrument inspection, 300×300 local tolerance is optimized from 0.01 to 0.005mm, reflecting the high-precision processing requirements.
Electromagnetic chuck surface can be directly used as the inspection reference surface.
2. Positioning accuracy test
| Parameters | Measuring length ≤250mm | Measuring length ≤1000mm |
|---|---|---|
| Bidirectional positioning accuracy (A) | 0.008 | 0.022 |
| Reverse difference (B) | 0.006 | 0.018 |
Implementation suggestions
- Priority inspection should be given to Detection during acceptance class=instrument>Grinding wheel spindle radial runout (G10) and table flatness (G8) and other key items
- CNC machine tools need to supplement pitch compensation detection according to ISO2302
- It is recommended to use non-contact laser measuring instruments for rotary axis inspection
Technology evolution trend
The standard adds a new software compensation clause (Article 5.8), which allows geometric errors to be compensated by the CNC system, but the compensation status must be clearly stated in the test report.
Loading PDF document...
Error loading PDF. Please make sure the file is valid and try again.
We also recommend
-
GB/T 21013-2025 in English
Machine tool—Hub flangs for plain grinding wheels
2025-10-31 -
GB/T 5288-2007 in English
Slideways grinding machines with two columns—Testing of the accuracy
1985-08-01 -
GB/T 4682-2007 in English
Internal cylindrical grinding machines with horizontal spindle—Testing of the accuracy
2007-07-17
