GB/T 16892-2022 PDF English
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GB/T 16892-2022 | English | 170 |
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Geometrical product specifications (GPS) - Dimensioning and tolerancing - Non-rigid parts
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GB/T 16892-1997 | English | 319 |
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Geometrical tolerancing indication of non-rigid parts
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GB/T 16892-2022: Geometrical product specifications (GPS) - Dimensioning and tolerancing - Non-rigid parts ---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT16892-2022
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 01.100.20
CCS J 04
Replacing GB/T 16892-1997
Geometrical product specifications (GPS) -
Dimensioning and tolerancing - Non-rigid parts
(ISO 10579:2010, MOD)
ISSUED ON: OCTOBER 12, 2022
IMPLEMENTED ON: OCTOBER 12, 2022
Issued by: State Administration for Market Regulation;
Standardization Administration of the PRC.
Table of Contents
Foreword ... 3
Introduction ... 5
1 Scope ... 6
2 Normative references ... 6
3 Terms and definitions ... 6
4 Basic principles ... 7
5 Indications on drawings ... 7
Annex A (Informative) Examples of indication and interpretation ... 8
Annex B (Normative) Scale and size of graphical symbols for indicating
geometrical tolerances of non-rigid parts ... 9
Annex C (Informative) Relation to the GPS matrix model ... 11
Bibliography ... 13
Foreword
This document is drafted in accordance with GB/T 1.1-2020 "Directives for
standardization - Part 1: Rules for the structure and drafting of standardizing
documents".
This document replaces GB/T 16892-1997 “Geometrical tolerancing indication of non-
rigid parts”. Compared with GB/T 16892-1997, in addition to structural adjustment and
editorial changes, the main technical changes are as follows:
a) Change the definition of “non-rigid part” (see 3.1; 3.1 of the 1997 edition);
b) Change the attribute of the annex “Scale and size of graphical symbols for
indicating geometrical tolerances of non-rigid parts” (see Annex B; Annex A of
the 1997 edition).
This document modifies and adopts ISO 10579:2010 “Geometrical product
specifications (GPS) - Dimensioning and tolerancing - Non-rigid parts”.
Compared with ISO 10579:2010, this document has made the following structural
adjustment:
- Add Annex B. Annex C corresponds to Annex B of ISO 10579:2010.
The technical differences between this document and ISO 10579:2010 and their reasons
are as follows:
- Add the application limits of this document (see Clause 1), to meet the requirements
of the drafting rules of standardization documents in China;
- Use normatively-referenced GB/T 1182-2018 to replace ISO 1101:2004 (see
Clause 5), to adapt to China's technical conditions and increase operability;
- Add “Scale and size of graphical symbols for indicating geometrical tolerances of
non-rigid parts” (see Annex B).
The following editorial changes have been made to this document:
- Incorporate the corrigendum of ISO 10579:2010/COR.1:2011; the outer margin of
the clauses involved has been marked with vertical double lines (ۅ);
- Rewrite Annex B of ISO 10579:2010;
- GB/T 16671 replaces ISO 2692:2006; GB/T 13319 replaces ISO 5458:1998; GB/T
17851 replaces ISO 5459:1981 (see Bibliography).
Geometrical product specifications (GPS) -
Dimensioning and tolerancing - Non-rigid parts
1 Scope
This document specifies the dimensioning and tolerancing methods of non-rigid parts;
and the drawing indication specifications required for the constraints when being tested
and verified.
This document is applicable to non-rigid parts.
2 Normative references
The contents of the following documents, through normative references in this text,
constitute indispensable provisions of this document. Among them, for dated references,
only the edition corresponding to that date applies to this document. For undated
references, the latest edition (including all amendments) applies to this document.
GB/T 1182-2018 Geometrical product specifications (GPS) - Geometrical
tolerancing - Tolerances of form, orientation, location and run-out (ISO 1101:2017,
MOD)
3 Terms and definitions
The following terms and definitions apply to this document.
3.1
Non-rigid part
Parts whose deformation in the free state significantly exceeds the dimensional and/or
geometrical tolerance (range) in the constrained state.
3.2
Free state
The state under the action of gravity only.
4 Basic principles
The allowable deformation of non-rigid parts under free state shall meet the geometrical
tolerance requirements under assembly conditions (assembly shall be conducted under
normal stress state).
Any part is subjected to gravity. Its deformation is related to the placement orientation
of the part in the free state. When indicating the tolerance of the part in the free state,
various factors causing the deformation of the part (such as gravity direction, support
state, etc.) shall be indicated on the drawing.
For non-rigid parts, when "GB/T 16892-2022" is indicated in the drawing, unless the
dimension and tolerance are attached with a modifying symbol Ⓕ, they are considered
to be requirements under constraint conditions; see Clause 5.
5 Indications on drawings
Drawings of non-rigid parts shall include the following indications as appropriate. See
Annex A:
a) Indicate "GB/T 16892-2022" in or near the title block;
b) Indicate the constraint conditions required by the drawing;
c) For the geometrical tolerance in the free state, in accordance with the provisions
of GB/T 1182-2018, attach the modifying symbol Ⓕ after the geometrical
tolerance in the tolerance frame, as specified in Annex B;
d) For the dimensional tolerance in free state, attach the modifying symbol Ⓕ after
the dimensional tolerance, as specified in Annex B;
e) The drawing shall be marked with the conditions required by the tolerance under
the free state, such as the direction of gravity or the state of support, etc.
...... Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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