JB/T 5109-2001Process design specification for sheet metal bending (English PDF)
金属板料压弯工艺设计规范
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Issued by
MIIT
Level / Type
Industry · Recommended
Issue date
June 4, 2001
Implementation date
October 1, 2001
Scope
JB/T 5109-2001 is the English-translated version of 金属板料压弯工艺设计规范.
JB/T 5109-2001 is the Chinese standard "Process design specification for sheet metal bending". Its scope clause reads: This standard specifies technological parameters and specification for technological design of bending for sheet metal.
This standard is applicable to cold bending forming of sheet metal on the press machine. Its clauses include structure technology of bending parts.
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Document preview — JB/T 5109-2001
National Standard of the People's Republic of China
- Replacing
- JB/T 5109-1991
Issued by: Ministry of Industry and Information Technology of the People's Republic of China
Contents
- Foreword i
- 1 Scope
- 2 Normative References
- 3 Structure Technology of Bending Parts
- 4 Precision of Bending Parts
- 5 Calculation of Bending Force
- 6 Calculation of Developed Length for Bending Parts
- Annex A (Normative) Calculation Formulae for Developed Length of Bending Parts
- Annex B (Normative) Simplified Calculation Sheet of Bending at 90°
1 Scope
This standard specifies technological parameters and specification for technological design of bending for sheet metal.
This standard is applicable to cold bending forming of sheet metal on the press machine.
2 Normative References
The following standards contain provisions which, through reference in this standard, constitute provisions of this standard. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below.
GB/T 4863-1985 General Terminology of Machine-Building Technology
GB/T 13914-1992 Tolerance of Dimensions for Stampings
GB/T 13915-1992 Tolerance of Angles for Stampings
GB/T 13916-1992 Unnoted Tolerance of Shape and Position for Stampings
GB/T 15055-1994 Permissible Stamping Variations in Dimensions without Tolerance Indication
3 Structure Technology of Bending Parts
3.1 Bending radius
3.1.1 Marking of bending radius
In dimensioning of bending parts, fillet radius shall be indicated.
3.1.2 Minimum bending radius
The minimum bending radius is the fillet radius of bending parts when the outer fiber of workblank produces no crack.
The minimum bending radius is only applied when necessary, and the bending radius shall be appropriately increased in all other cases.
......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.
Referenced standards
Similar standards
Editions of JB/T 5109
| Edition | Title | Revision | Status |
|---|---|---|---|
| JB/T 5109-2001 | Process design specification for sheet metal bending | current edition | Current |
| JB/T 5109-1991 | Process design specification for sheet metal bending | previous edition | Superseded |
This page sells the current edition, JB/T 5109-2001. Earlier editions are listed for reference only.
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