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Sheet metal formability and test methods -- Part 2: General test rules
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Basic data
| Standard ID | GB/T 15825.2-2008 (GB/T15825.2-2008) |
| Description (Translated English) | Sheet metal formability and test methods -- Part 2: General test rules |
| Sector / Industry | National Standard (Recommended) |
| Classification of Chinese Standard | J32 |
| Classification of International Standard | 77.040.10 |
| Word Count Estimation | 9,975 |
| Date of Issue | 2008-12-23 |
| Date of Implementation | 2009-06-01 |
| Older Standard (superseded by this standard) | GB/T 15825.2-1995 |
| Regulation (derived from) | National Standard Approval Announcement 2008 No.21 (Total No.134) |
| 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 general method of operation metal formability tests. This section applies to GB/T 15825 standard system package of various provisions of formability tests. |
GB/T 15825.2-2008: Sheet metal formability and test methods -- Part 2: General test rules
---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Sheet metal formability and test methods Part 2. General test rules
ICS 77.040.10
J32
National Standards of People's Republic of China
Replacing GB/T 15825.2-1995
Performance and test methods for metal sheet forming
Part 2. General test procedures
Posted 2008-12-23
2009-06-01 implementation
Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
Standardization Administration of China released
Foreword
GB/T 15825 "Performance and test methods for sheet metal forming" is divided into eight sections.
--- Part 1. formability and indicators;
--- Part 2. General test procedures;
--- Part 3. drawing and drawing load test;
--- Part 4. reaming test;
--- Part 5. bending test;
--- Part 6. Cone cup test;
--- Part 7. Test lug;
--- Part 8. Forming Limit Diagram (FLD) Determination Guide.
This part of GB/T 15825 Part 2.
This Part replaces GB/T 15825.2-1995 "General Performance Test procedures and test methods of sheet metal forming."
Section compared with the GB/T 15825.2-1995, major changes in the following.
--- Added "foreword";
--- Modify the provisions of 2.1;
--- In 3.2.2, added a "wire cutting method" and "Whetstone sandpaper or sanding.";
--- In 3.2.4, delete the words "shall be no deformation with hardening phenomenon";
--- In 4.2.1, added "and replace if necessary";
--- In 6.1.1, add the words "reference HB6140.1";
--- Modify the format and content of Table 2;
--- Modify the provisions of 9.1;
--- In 9.2, the addition of "or test commissioned by the agreement and the parties undertake";
--- Appendix A the name changes to "minimum BHF estimates";
--- Increased A. 2;
--- Appendix B of the name was changed to "formability test failure criteria";
--- Increased references;
--- Some of the original standard text made editorial changes.
This section of the Appendices A and B are informative appendices.
This part is proposed by China Machinery Industry Federation.
This part of the National Standardization Technical Committee centralized forging.
This section is drafted. Wuhan University of Technology, Beijing University of Aeronautics and Astronautics, Zhengzhou University, Dongfeng Motor Co. stamping die.
The main drafters of this section. Jiangkui Hua, Li Xing, Cao deep, Waring, Huang Shangyu, Mao Huajie, Li Jianhua.
This part of the standard replaces the previous editions are.
--- GB/T 15825.2-1995.
Performance and test methods for metal sheet forming
Part 2. General test procedures
1 Scope
GB/T 15825 provisions of this part of the general method of operation of sheet metal formability tests.
This section applies to GB/T 15825 standard system package of various provisions of the formability tests.
2 general method of operation formability tests
2.1 Sheet metal formability test is usually carried out at 10 ℃ ~ 35 ℃ temperature environment. If strict requirements, temperature-controlled laboratory
System for the 23 ℃ ± 5 ℃.
Formability of sheet metal testing process 2.2 containing the following general steps.
a) sample preparation;
b) Test preparation mold;
c) test device with the test machine is ready;
d) Sample lubrication;
e) pre-test operation;
f) formal test;
g) data collection and calculation;
h) Fill in the test report.
3 sample preparation
3.1 Sampling
Select the portion of the sample should be avoided 3.1.1 sheet metal material head and edges.
3.1.2 Select the angle of the sample (sample angle) to the rolling direction as a reference, the allowable angle tolerance of ± 1 °.
3.2 Sample Preparation
3.2.1 Sample geometry and dimensions (including tolerances) is determined by the specific test standards.
3.2.2 Sample Available Chong, preparation or cutting scissors, wire cutting and other methods. For perforated sample usually requires burr hole edge or be
Reaming, Whetstone sandpaper or sanding or grinding.
3.2.3 The prepared sample should be smooth, no scratches the surface, edge burr hole edge should be smooth, without edges and burrs. For demanding test
Like edge or hole edge, applied 5 times magnifying glass to check there is no micro-cracks or other defects.
3.2.4 prepared samples should not be cold, hot leveling or repair any knock, and prepared to deal with samples indicate their status.
3.2.5 If the sample thickness measurement, there are strict requirements should be completed after the sample preparation work in the most representative sample of three parts
Measuring the thickness, and their average as measured specimen thickness measurement is accurate to 0.01mm.
3.2.6 The prepared sample shall specific test requirements grouping number.
3.2.7 If the sample being not prepared, it should be coated with anti-rust oil and properly stored.
4 Test mold preparation
4.1 mold design and manufacturing
4.1.1 for mold work parts, such as punch, die and blank holder, etc., in addition to working part shapes and sizes must be specifically labeled
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