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GB/T 13914-2013 (GBT13914-2013)

GB/T 13914-2013_English: PDF (GBT 13914-2013, GBT13914-2013)
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BASIC DATA
Standard ID GB/T 13914-2013 (GB/T13914-2013)
Description (Translated English) Tolerance of dimensions for stamping parts
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard J32
Classification of International Standard 25.020
Word Count Estimation 8,852
Older Standard (superseded by this standard) GB/T 13914-2002
Drafting Organization YTO (Luoyang) Fulai Ge Body Co., Ltd.
Administrative Organization Forging the National Standardization Technical Committee
Regulation (derived from) National Standards Bulletin 2013 No. 9
Proposing organization National Standardization Technical Committee for Forging (SAC/TC 74)
Issuing agency(ies) General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China
Summary This standard specifies the dimensions of metal stampings tolerance level, code, tolerance values ??and the deviation value. This standard applies to flat sheet metal stamping and forming stampings.

Standards related to: GB/T 13914-2013

GB/T 13914-2013
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 25.020
J 32
Replacing GB/T 13914-2002
Tolerance of Dimensions for Stamping Parts
ISSUED ON: JUNE 09, 2013
IMPLEMENTED ON: MARCH 01, 2014
Issued by: General Administration of Quality Supervision, Inspection and
Quarantine;
Standardization Administration of PRC.
Table of Contents
Foreword ... 3
1 Scope ... 4
2 Terms and Definitions ... 4
3 Dimensional Tolerance Grade, Code and Value of Stamping Parts ... 4
4 Dimensional Deviation of Stamping Parts ... 9
5 Selection of Tolerance Grade ... 9
Appendix A (Normative) Selection of Tolerance Grades ... 10
Foreword
This Standard was drafted as per the rules specified in GB/T 1.1-2009.
This Standard replaced GB/T 13914-2002 Tolerance of Dimensions for Stampings.
Compared with GB/T 13914-2002, this Standard has the major technical changes as
follows besides the editorial modifications:
--- Add legends of blanking parts and stamping parts (see Figures 1 and 2 of this
Edition);
--- Add the basic size of 0.5 for blanking parts (see Table 1 of this Edition);
--- Add the basic size of 0.5 for stamping parts (see Table 2 of this Edition);
--- Modify the English translation of the standard name (see cover of this Edition;
cover of 2002 Edition);
---Modify the limit deviation (see Clauses 1 and 4, 4.1, 4.2, 4.3 of this Edition;
Clauses 1 and 4, 4.1, 4.2, 4.3 of 2002 Edition);
--- Modify the English translation of nouns (see 2.1, 2.2 of this Edition; 2.1 and 2.2
of 2002 Edition);
--- Modify the content of 3.3; and specify the expression method selected from this
Standard (see 3.3 of this Edition; 3.3 of 2002 Edition);
--- Modify the content of the processing method in the Table A.1 (see Table A.1 of
this Edition; Table A.1 of 2002 Edition).
This Standard was proposed by and under the jurisdiction of National Technical
Committee for Standardization of Forging (SAC/TC 74).
Chief drafting organizations of this Standard: YTO (Luoyang) Flag Auto-Body Co., Ltd.
Chief drafting staffs of this Standard: You Hai, Li Lichun, and Tong Jingze.
The historical editions replaced by this Standard are as follows:
--- GB/T 13914-1992;
--- GB/T 13914-2002.
Tolerance of Dimensions for Stamping Parts
1 Scope
This Standard specifies the dimensional tolerance grade, code, tolerance value and
deviation value of metal stamping parts.
This Standard is applicable to the blanking parts and stamping parts for metal plates.
2 Terms and Definitions
For the purpose of this document, the following terms and definitions apply.
2.1 Blanking parts
Stamping parts that are processed by plane blanking process.
2.2 Stamping parts
Stamping parts that are processed by bending, deep drawing and other forming
methods.
3 Dimensional Tolerance Grade, Code and Value of
Stamping Parts
3.1 The dimensional tolerances of blanking parts are divided into 11 grades, namely:
ST1 to ST11. ST represents the dimensional tolerance of blanking parts; while the code
of tolerance grade is indicated by Arabic numerals. From ST1 to ST11, the grades
gradually decrease. The dimensional tolerances of blanking parts are applicable to
blanking parts, as well as the dimensions that are processed by the blanking process
on the stamping parts. The dimensional tolerance values of blanking parts are
specified in Table 1. See Figure 1 for the selection example of basic dimensions of B,
D, and L.
For example, when selecting the ST 6 tolerance grade of this Standard, it is expressed
as: GB/T13914-ST 6; when selecting the FT 6 tolerance grade of this Standard, it is
expressed as: GB/T13914-FT 6.
4 Dimensional Deviation of Stamping Parts
4.1 The deviation value of the hole (inner shape) size takes the tolerance value given
in Tables 1 and 2; the upper deviation is prefixed with a "+" sign, and the lower deviation
is "0".
4.2 The deviation value of the shaft (outer shape) size shall take the tolerance value
given in Tables 1 and 2; the lower deviation is prefixed with "-" sign, and the upper
deviation shall be "0".
4.3 The deviation values of the hole center distance, hole edge distance, bending,
deep drawing and other stamping parts length, height and unmarked dimensional
tolerances shall be taken as half of the tolerance values given in Tables 1 and 2; the
upper and lower deviations are prefixed with "±" sign, respectively.
5 Selection of Tolerance Grade
See Appendix A for the selection of dimensional tolerance grades for the blanking parts
and stamping parts given in this Standard.
...