JB/T 12740-2016Remanufactured internal combustion engines - Crankshaft process specifications (English PDF)
再制造内燃机 曲轴工艺规范
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Issued by
MIIT
Level / Type
Industry · Recommended
Issue date
April 5, 2016
Implementation date
September 1, 2016
Scope
JB/T 12740-2016 is the English-translated version of 再制造内燃机 曲轴工艺规范.
Crankshafts are the subject of JB/T 12740-2016, a recommended standard of the Chinese machinery industry on remanufacturing. It fixes the terms and definitions, the requirements on the remanufacturing process, the technical requirements for the remanufactured crankshaft, the inspection methods, and marking, packaging, transport and storage.
It is written for the remanufacturing of crankshafts of reciprocating internal combustion engines, and crankshafts of other types may also be remanufactured according to it.
Among the standards it quotes are GB/T 230.1, GB/T 231.1, GB/T 1184-1996, GB/T 1800.1-2009, GB/T 1958, GB/T 3821, GB/T 4340.1, JB/T 6729 and JB/T 9774. It is filed under J92 and ICS 27.020.
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Document preview — JB/T 12740-2016
National Standard of the People's Republic of China
- ICS
- 27.020
Issued by: Ministry of Industry and Information Technology of the People's Republic of China
Contents
- 1 Scope
- 2 Normative references
- 3 Terms and definitions
- 4 Requirements on the remanufacturing process
- 4.1 General principles
- 4.2 Disassembly and classification
- 4.3 Cleaning
- 4.4 Inspection before the repair
- 4.5 Decision on the conditions under which an old crankshaft can be remanufactured
- 4.6 Pre-treatment before the repair of the crankshaft
- 4.7 Remanufacturing repair methods
- 5 Technical requirements of the remanufactured finished crankshaft
- 5.1 General principles
- 5.2 Surface hardness
- 5.3 Surface roughness
- 5.4 Dimensional tolerances and geometrical tolerances
- 5.5 Static and dynamic balance
- 5.6 Cleanliness
- 5.7 Magnetic traces of the defects
- 5.8 Surface quality
- 5.9 Service life
- 5.10 Inspection requirements
- 6 Inspection methods
- 6.1 General requirements
- 6.2 Surface hardness
- 6.3 Surface roughness
- 6.4 Dimensions and deviations
- 6.5 Form and position errors
- 6.6 Static and dynamic balance
- 6.7 Cleanliness
- 6.8 Check of the surface quality
- 6.9 Magnetic traces of the defects
- 7 Marking, packaging, transport and storage
- 7.1 Marking
- 7.2 Packaging
- 7.3 Transport
- 7.4 Storage
- 7.5 Other
What this standard covers
This standard specifies the terms and definitions of remanufacturing internal combustion engine crankshafts, re-manufacturing process requirements, remanufacturing finished crankshaft technical requirements, inspection methods and marking, packaging, transportation and storage. This standard applies to the reciprocating internal combustion engine crankshaft (hereinafter referred to as crankshaft) remanufacturing, other types of remanufactured crankshaft can also refer to the use.
Document data
International classification (ICS): 27.020.
Chinese classification (CCS): J92.
Estimated length of the Chinese original: 9,935 words.
Standards quoted by this document
GB/T 230.1; GB/T 231.1; GB/T 1184-1996; GB/T 1800.1-2009; GB/T 1958; GB/T 3821; GB/T 4340.1; JB/T 6729; JB/T 9774
3 Terms and definitions
4 Requirements on the remanufacturing process
5 Technical requirements of the remanufactured finished crankshaft
6 Inspection methods
7 Marking, packaging, transport and storage
......
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
Normative references
- GB/T 230.1Metallic materials - Rockwell hardness test - Part 1: Test method
- GB/T 231.1Metallic materials - Brinell hardness test - Part 1: Test method
- GB/T 1184-1996Geometrical tolerancing. Geometrical tolerance for features without individual tolerance indications
- GB/T 1800.1-2009Geometrical product specifications (GPS) - ISO code system for tolerances on linear sizes - Part 1: Basis of tolerances, deviations and fits
- GB/T 1958Geometrical Product Specifications(GPS)—Geometrical tolerance—Verification
- GB/T 3821Small and medium power internal combustion engines - Cleanliness limits and measurement methods
Similar standards
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Related Standards
GB/T 1184-1996 — Geometrical tolerancing. Geometrical tolerance for features without individual tolerance indications
GB/T 1800.1-2009 — Geometrical product specifications (GPS) - Limits and fits - Part 1: Bases of tolerances, deviations and fits
GB/T 1958-1980 — Rules for inspection of form and position tolerances
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JB/T 12740-2016
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