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JB/T 12741-2016Remanufactured internal combustion engines - Camshaft process specifications (English PDF)

再制造内燃机凸轮轴工艺规范

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Issued by

MIIT

Level / Type

Industry · Recommended

Issue date

April 5, 2016

Implementation date

September 1, 2016

Scope

JB/T 12741-2016 is the English-translated version of 再制造内燃机凸轮轴工艺规范.

JB/T 12741-2016 is a recommended machinery industry standard of China for the remanufacturing of camshafts.

It gives the terms and definitions, the requirements on the remanufacturing process, the technical requirements for the finished remanufactured camshaft, the inspection methods and the inspection rules, and the provisions for marking, packaging, transport and storage.

The camshafts covered are those of the valve train of reciprocating internal combustion engines. It quotes GB/T 230.1, GB/T 231.1, GB/T 1184-1996, GB/T 1800.1-2009, GB/T 1958, GB/T 28619-2012, JB/T 6728.1 and JB/T 6729. Its Chinese classification is J93 and its ICS code 27.020.

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Document preview — JB/T 12741-2016

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

1 Scope
2 Normative references
3 Terms and definitions
4 Requirements on the remanufacturing process
4.1 General principles
4.2 Disassembly
4.3 Cleaning
4.4 Testing and classification
4.5 Conditions under which an old camshaft can be remanufactured
4.6 Remanufacturing repair methods
4.7 Assembly
5 Technical requirements of the remanufactured finished product
5.1 Dimensional tolerances of the diameter of the support journal of the remanufactured camshaft
5.2 Limit deviations of the angles
5.3 Geometrical tolerances
5.4 Surface roughness
5.5 Lift deviation of the remanufactured cam
5.6 Appearance
5.7 Magnetic particle testing
5.8 Service life
6 Inspection methods
6.1 Hardness
6.2 Dimensions, angles and lift deviations
6.3 Form and position errors
6.4 Surface roughness
6.5 Appearance
6.6 Magnetic particle testing
6.7 Testing of the other items
7 Inspection rules
7.1 General principles
7.2 Inspection items
7.3 Sampling period and plan
8 Marking, packaging, transport and storage
8.1 Marking
8.2 Packaging
8.3 Transport
8.4 Storage

What this standard covers

This standard specifies the terms and definitions of remanufacturing engine camshafts, re-manufacturing process requirements, remanufacturing finished product technical requirements, inspection methods, inspection rules, marking, packaging, transportation and storage. This standard is applicable to the remanufacturing of the camshaft (hereinafter referred to as camshaft) of the air distribution mechanism for reciprocating internal combustion engines.

Document data

International classification (ICS): 27.020.

Chinese classification (CCS): J93.

Estimated length of the Chinese original: 10,184 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 28619-2012; JB/T 6728.1; JB/T 6729

3 Terms and definitions

4 Requirements on the remanufacturing process

5 Technical requirements of the remanufactured finished product

6 Inspection methods

7 Inspection rules

8 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

Similar standards

JB/T 13326-2018|JB/T 13327-2018|JB/T 13339-2018|JB/T 13340-2018|JB/T 12732-2016|JB/T 12733-2016

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