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GB/T 15055-2021 PDF English

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GB/T 15055-2021: Permissible stamping variations in dimensions without tolerance indication
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GB/T 15055: Evolution and historical versions

Standard IDContents [version]USDSTEP2[PDF] deliveryName of Chinese StandardStatus
GB/T 15055-2021English155 Add to Cart 0-9 seconds. Auto-delivery Permissible stamping variations in dimensions without tolerance indication Valid
GB/T 15055-2007English70 Add to Cart 0-9 seconds. Auto-delivery Permissible stamping variations in dimensions without tolerance indication Obsolete
GB/T 15055-1994English279 Add to Cart 3 days Permissible stamping varitions in dimensions without tolerance indication Obsolete

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GB/T 15055-2021: Permissible stamping variations in dimensions without tolerance indication

---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/GBT15055-2021
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

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). 3.2 forming size The linear dimensions of stamping pieces processed by bending, deep drawing and other forming processes (see l1, l2, d1, h, h1 in Figure 2 and Figure 3). 3.3 blanking corner radius The linear dimension of the corner radius of the stamping piece processed by blanking, punching and other separation processes (see R in Figure 4). 3.4 forming corner radius The linear dimension of the corner radius of the stamping part processed by bending, deep drawing and other forming processes (see r, r1, r2, r3 in Figure 2 and Figure 3). 3.5 blanking angle At the plane of the flat or formed piece, the angular dimension formed by blanking (see α in Figure 4)

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.

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 5.4 Limit deviation of angular size without tolerance indication

6 Representation method for grades of tolerances without indication

Use the limit deviation of the size without tolerance indication specified in this document. In the corresponding drawings, technical documents or files, this document's number and tolerance grade symbol are used. For example, when selecting the level-m tolerance grade in this document, it is expressed as. GB/T 15055-m. ......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.


      

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