GB/T 131-2006 English PDF (GBT131-2006)

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GB/T 131-2006: Geometrical Product Specifications (GPS) -- Indication of Surface texture in technical Product documentation
GB/T 131-2006
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 170.040.20
J 04
GB/T 131-2006 / ISO 1302:2002
Replacing GB/T 131-1993
Geometrical Product Specifications (GPS) – Introduction of
Surface Texture in Technical Product Documentation
(ISO 1302:2002, IDT)
ISSUED ON: JULY 19, 2006
IMPLEMENTED ON: FEBRUARY 01, 2007
Issued by: General Administration of Quality Supervision, Inspection and
Quarantine;
Standardization Administration of PRC.
Table of Contents
Foreword ... 3
1 Scope ... 4
2 Normative References ... 4
3 Terms and Definitions ... 5
4 Graphical Symbols for the Indication of Surface Texture ... 6
5 Composition of Complete Graphical Symbol for Surface Texture ... 8
6 Indication of Surface Texture Parameters ... 10
7 Indication of Manufacturing Method or Related Information ... 17
8 Indication of the Surface Lay ... 17
9 Indication of Machining Allowance ... 19
10 Summarizing of Indications of Surface Texture Requirements and their Values .. 19
11 Position on Drawings and other Technical Product Documentation ... 20
Annex A (Normative) Proportions and Dimensions of Graphical Symbols ... 26
Annex B (Informative) Meanings of Surface Texture Symbols and Codes ... 28
Annex C (Informative) Examples of Indication of Surface Texture Requirements ... 31
Annex D (Informative) Minimum Indications for Unambiguous Control of Surface
Functions ... 34
Annex E (Informative) Surface Texture Parameter Designations ... 38
Annex F (Informative) Evaluation Length, ln ... 41
Annex G (Informative) Transmission Band and Sampling Length ... 43
Annex H (Informative) Importance of this Standard ... 45
Annex I (Informative) Evolution of Standard ... 47
Annex J (Informative) Relation to the GPS Matrix Model ... 50
Bibliography ... 52
Foreword
This Standard equivalently adopted ISO 1302:2002 Geometrical Product Specifications (GPS)
– Introduction of Surface Texture in Technical Product Documentation (English Version).
For the benefit of use, this Standard made the following editorial modifications:
--- Delete the Foreword and Introduction in the International Standard;
--- Modify some descriptions apply to the international standard into that apply to Chinese
Standard; e.g.: modify the marking example in the international standard such as Rα
0.3 and Rz 0.9, etc. into Rα 0.2 and Rz 0.8, etc.
This Standard was formulated by reference of the serial standards on (GPS) surface texture
published in 1996 and 1997.
This Standard replaced GB/T 131-1993 Mechanical Drawings - Surface Roughness Symbols
and Methods of Indicating.
Compared with Chinese standard in 1980s, this Standard made great changes in the technical
contents. For instance, some marking examples in the standard have been re-interpreted
totally.
In this Standard, the Annex A is normative; while Annexes B, C, D, E, F, G, H, I and J are
informative.
This Standard shall be under the jurisdiction of National Technical Committee on Product
Dimension and Geometric Element Specifications of Standardization Administration of China.
Drafting organizations of this Standard: China Productivity Centre for Machinery, China
Academy of Machinery Science and Technology; National Institute of Metrology; Times Group
Co., Ltd.; and Jiangsu Teachers University of Technology.
Chief drafting staffs of this Standard: Wang Xinling, Gao Sitian, Wang Zhongbin, Qiang Yi,
Wang Huaide, Yang Dongbai, and Chen Jingyu.
Geometrical Product Specifications (GPS) – Introduction of
Surface Texture in Technical Product Documentation
1 Scope
This Standard specifies the rules for the indication of surface texture in technical product
documentation (e.g., drawings, specifications, contracts, reports) by means of graphical
symbols and textual indications.
This Standard is applicable to the indication of requirements for surfaces by means of
a) profile parameters, according to GB/T 3505, related to the
- R-profile (roughness parameters);
- W-profile (waviness parameters); and
- P-profile (structural parameters);
b) motif parameters, according to GB/T 18618, related to the
- roughness motif, and
- waviness motif,
c) parameters related to the material ratio curve according to GB/T 18778.2 and GB/T
18778.3.
This standard does not apply to the marking method of surface defects (such as holes,
scratches, etc.), if there are requirements for surface defects, see GB/T 15757.
2 Normative References
The provisions in following documents become the provisions of this Standard through
reference in this Standard. For dated references, the subsequent amendments (excluding
corrigendum) or revisions do not apply to this Standard, however, parties who reach an
agreement based on this Standard are encouraged to study if the latest versions of these
documents are applicable. For undated references, the latest edition of the referenced
document applies.
GB/T 1182-1996 Geometrical Tolerancing - Generalities, Definitions, Symbols,
Indications on Drawings (eqv ISO 1101:1996)