GB/T 15055-2021_English: PDF (GB/T15055-2021)
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Permissible stamping variations in dimensions without tolerance indication
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GB/T 15055-2021
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| GB/T 15055-2007 | English | 70 |
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Permissible stamping variations in dimensions without tolerance indication
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| GB/T 15055-1994 | English | 279 |
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Permissible stamping varitions in dimensions without tolerance indication
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| Standard ID | GB/T 15055-2021 (GB/T15055-2021) | | Description (Translated English) | Permissible stamping variations in dimensions without tolerance indication | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | J32 | | Classification of International Standard | 25.020 | | Word Count Estimation | 9,920 | | Date of Issue | 2021-10-11 | | Date of Implementation | 2022-05-01 | | Older Standard (superseded by this standard) | GB/T 15055-2007 | | Drafting Organization | Xi'an Jiaotong University, Beijing Institute of Mechanical and Electrical Engineering Co., Ltd., Tianjin Vocational and Technical Normal University, Tianjin Automobile Mould Co., Ltd., Anhui Jianghuai Automobile Group Co., Ltd., Wuxi Pengde Auto Parts Co., Ltd., Zhejiang Institute of Water Conservancy and Hydropower | | Administrative Organization | National Forging Standardization Technical Committee (SAC/TC 74) | | Regulation (derived from) | National Standard Announcement No. 12 of 2021 | | Proposing organization | National Forging Standardization Technical Committee (SAC/TC 74) | | Issuing agency(ies) | State Administration for Market Regulation, National Standardization Administration | | Standard ID | GB/T 15055-2007 (GB/T15055-2007) | | Description (Translated English) | Permissible stamping variations in dimensions without tolerance indication | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | J32 | | Classification of International Standard | 25.020 | | Word Count Estimation | 8,843 | | Date of Issue | 2007-04-18 | | Date of Implementation | 2007-11-01 | | Older Standard (superseded by this standard) | GB/T 15055-1994 | | Drafting Organization | Xi'an Jiaotong University | | Administrative Organization | Forging the National Standardization Technical Committee | | Regulation (derived from) | National Standard Announcement 2007 No.4 (Total No.104) | | Proposing organization | China Machinery Industry Federation | | Issuing agency(ies) | Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China; Standardization Administration of China | | Summary | This standard specifies the stamping without individual tolerance of linear and angular dimensions tolerance level and limit deviations. This standard applies to metal stamping parts, non-metallic stampings may refer to this standard. This standard specifies the maximum tolerance for non- fit size. Precision stamping and extrusion parts may refer to the use of this standard. | | Standard ID | GB/T 15055-1994 (GB/T15055-1994) | | Description (Translated English) | Permissible stamping varitions in dimensions without tolerance indication | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | J32 | | Classification of International Standard | 77.140.80 | | Word Count Estimation | 7,723 | | Date of Issue | 1994/5/3 | | Date of Implementation | 1995/3/1 | | Regulation (derived from) | National-Standard Bulletin 2007 No. 4 (No. 104 overall) | | Proposing organization | Ministry of Machinery Industry of the People Republic of China | | Issuing agency(ies) | State Bureau of Technical Supervision |
GB/T 15055-2021
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 25.020
CCS J 32
Replacing GB/T 15055-2007
Permissible stamping variations in dimensions without
tolerance indication
ISSUED ON. OCTOBER 11, 2021
IMPLEMENTED ON. MAY 01, 2022
Issued by. State Administration for Market Regulation;
Standardization Administration of the People's Republic of China.
Table of Contents
Foreword... 3
1 Scope... 5
2 Normative references... 5
3 Terms and definitions... 5
4 Tolerance grades... 9
5 Limit deviation of dimensions without tolerance indication... 9
6 Representation method for grades of tolerances without indication... 10
Permissible stamping variations in dimensions without
tolerance indication
1 Scope
This document specifies linear and angular dimension tolerance grades and limit
deviations of stamping pieces without tolerance indication.
This document applies to metal stamping pieces. Non-metal stamping pieces may refer
to this document.
The limit deviations specified in this document apply to non-fitted dimensions.
2 Normative references
The following referenced documents are indispensable for the application of this
document. For dated references, only the edition cited applies. For undated references,
the latest edition of the referenced document (including any amendments) applies.
GB/T 8541, Terminology of forging and stamping
3 Terms and definitions
For the purposes of this document, the terms and definitions defined in GB/T 8541 as
well as the followings apply.
3.1 blanking size
The linear dimensions of stamping pieces processed by blanking, punching and other
separation processes (see D, d, s1, s2 in Figure 1).
mm
3.5 blanking angle
At the plane of the flat or formed piece, the angular dimension formed by blanking (see
α in Figure 4)
3.6 bending angle
The angular dimension of the stamping piece processed by the bending forming process
(see β in Figure 2).
4 Tolerance grades
The limit deviation of blanking size without tolerance indication, forming size without
tolerance indication, blanking corner radius size without tolerance indication, blanking
angle size without tolerance indication and bending angle size without tolerance
indication are divided into f, m, c, v, four descending tolerance grades. The limit
deviation of forming corner radius size without tolerance indication is not divided into
the tolerance grades. Tolerances shall be indicated for dimensions of 0.5mm and below.
5 Limit deviation of dimensions without tolerance indication
5.1 Limit deviation of blanking size without tolerance indication
The limit deviation of blanking size without tolerance indication shall be specified in
Table 1.
5.2 Limit deviation of forming size without tolerance indication
The limit deviation of forming size without tolerance indication shall be specified in
Table 2.
5.3 Limit deviation of corner radius size without tolerance indication
5.3.1 The limit deviation of blanking corner radius size without tolerance indication
shall be specified in Table 3.
5.3.2 The limit deviation of forming corner radius size without tolerance indication shall
be specified in Table 4.
5.4 Limit deviation of angular size without tolerance indication
5.4.1 The limit deviation of blanking angle size without tolerance indication shall be
specified in Table 5.
5.4.2 The limit deviation of bending angle size without tolerance indication shall be
specified in Table 6.
......
GB/T 15055-2007
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 25.020
J 32
Replacing GB/T 15055-1994
Permissible Stamping Variations in
Dimensions without Tolerance Indication
ISSUED ON. APRIL 18, 2007
IMPLEMENTED ON. NOVEMBER 1, 2007
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 Tolerance Grade ... 6
4 Limit Deviation without Tolerance Dimension Indication ... 6
5 Expression Methods Adopting this Standard ... 7
Foreword
This Standard replaces GB/T 15055-1994 Permissible Stamping Variations in
Dimensions without Tolerance Indication.
This Standard refers to partial contents of GB/T 13914-2002 Tolerance of Dimensions
for Stamping Parts, GB/T 13915-2002 Tolerance of Angles for Stamping Parts, GB/T
1804-2000 General Tolerances - Tolerances for Linear and Angular Dimensions
without Individual Tolerance Indications; it adjusts some tolerances, adds terms and
definitions, and makes editorial changes.
This Standard was proposed by China Machinery Industry Federation.
This Standard shall be under the jurisdiction of National Technical Committee for
Standardization of Forging.
Drafting organizations of this Standard. Xi’an Jiaotong University, and Beijing
Research Institute of Mechanical & Electrical Technology.
Chief drafting staffs of this Standard. Guo Cheng, Zhang Qiansheng, Wu Huaying,
and Shi Dongcai.
The historical edition replaced by this Standard is as follows.
-- GB/T 15055-1994.
Permissible Stamping Variations in
Dimensions without Tolerance Indication
1 Scope
This Standard specifies the stamping parts’ tolerance grade and limit deviation for
linear and angular dimensions without individual tolerance indication.
This Standard is applicable to the metal stamping parts; while the non-metal stamping
parts can be implemented as per this Standard.
The limit deviations specified in this Standard are applicable to the non-coordinating
size.
Precision stamping and extrusion parts can refer to the use of this Standard.
2 Terms and Definitions
The following terms and definitions are applicable to this Standard.
2.1 Blanking size
The linear dimension of stamping parts through the processing of punching, blanking
and other separation processes (see d, D in Figure 1 and D in Figure 3).
Figure 1 Blanking Size
2.2 Forming size
2.4 Forming corner radius
Corner radius’s linear dimension of stamping parts through the processing of bending,
deep-drawing, and other forming processes (see r, r1, r2, r3 in Figure 2 and 3) .
2.5 Blanking angle
Angular dimension through the blanking processing on the panel or forming part
surface (see a in Figure 4).
2.6 Bending angle
Angular dimension of stamping parts through the bending forming process (see a in
Figure 2).
3 Tolerance Grade
Blanking size without tolerance indication, forming size without tolerance indication,
blanking corner radius and other linear dimensions without tolerance indication, and
angular dimension and limit deviation without tolerance indication can be divided into
four tolerance grades, namely, f (precise grade), m (medium grade), c (coarse grade),
v (very coarse grade); while the limit deviation of forming corner radius’ linear
dimension without tolerance indication is free of tolerance grade.
4 Limit Deviation without Tolerance Dimension
Indication
4.1 Limit deviation of blanking parts’ linear dimension without tolerance
indication
Limit deviation of blanking parts’ linear dimension without tolerance indication shall
conform to the provisions of Table 1.
4.2 Limit deviation of forming parts’ linear dimension without tolerance
indication
Limit deviation of forming parts’ linear dimension without tolerance indication shall
conform to the provisions of Table 2.
4.3 Limit deviation of corner radius’ linear dimension without tolerance
indication
4.3.1 Limit deviation of blanking corner radius’ linear dimension without tolerance
indication shall conform to the provisions of Table 3.
......
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