JB/T 6728.2-2008
ActiveInternal combustion engines - Camshafts - Part 2: Wedge-cross rolling blanks
内燃机 凸轮轴 第2部分：楔横轧毛坯
Catalogue
前言 → 1 范围 → 2 规范性引用文件 → 3 技术要求 → 4 检验方法 → 5 检验规则 → 6 标志、包装、运输和贮存 Foreword → 1 Scope → 2 Normative References → 3 Technical Requirements → 4 Inspection Methods → 5 Inspection Rules → 6 Marking, Packaging, Transport and Storage
Scope
This part specifies the technical requirements, inspection methods, inspection rules, marking, packaging, transport and storage for wedge-cross rolling blanks of camshafts for internal combustion engines.
本部分规定了内燃机凸轮轴楔横轧毛坯的技术要求、检验方法、检验规则、标志、包装、运输和贮存。
Keywords
Application Summary AI generated
Manufacturers and suppliers of internal combustion engine components use this standard to produce and inspect wedge-cross rolled camshaft blanks. It ensures that the material, dimensional accuracy, and surface quality of the blanks meet requirements, thereby guaranteeing the performance and reliability of the final camshaft. This standard is important for improving the standardization and interchangeability of engine parts.
内燃机制造商和零部件供应商使用该标准来生产和检验凸轮轴楔横轧毛坯。它确保了毛坯的材质、尺寸精度和表面质量符合要求，从而保证最终凸轮轴的性能和可靠性。该标准对于提高内燃机零部件的标准化水平和互换性具有重要意义。
AI Summary AI generated
JB/T 6728.2-2008 is a machinery industry standard for wedge-cross rolling blanks of camshafts for internal combustion engines, replacing JB/T 8578-1997. It specifies technical requirements (including material, mechanical properties, macrostructure, surface quality, dimensional tolerances, etc.), inspection methods, inspection rules, and requirements for marking, packaging, transport, and storage. Key technical changes include replacing straightness with root circle journal runout and adjusting tolerances, modifying width and axial dimension tolerances, and updating the rust-proof period. This standard is applicable to the production and inspection of wedge-cross rolled camshaft blanks.
JB/T 6728.2-2008是内燃机凸轮轴楔横轧毛坯的机械行业标准，代替了JB/T 8578-1997。该标准规定了毛坯的技术要求（包括材质、力学性能、低倍组织、表面质量、尺寸公差等）、检验方法、检验规则以及标志、包装、运输和贮存要求。主要技术变化包括将直线度改为根圆轴颈圆跳动并调整公差、修改宽度和轴向尺寸公差、以及修改防锈期。该标准适用于内燃机凸轮轴楔横轧毛坯的生产和检验。
Key Sentences extracted from text
本部分规定了内燃机凸轮轴楔横轧毛坯的技术要求、检验方法、检验规则、标志、包装、运输和贮存。
本部分代替JB/T 8578-1997《内燃机凸轮轴楔横轧毛坯 技术条件》。
将凸轮轴毛坯直线度改为根圆轴颈圆跳动，并修改了公差值；
修改了凸轮轴宽度、轴向尺寸公差；
修改了防锈期；
This part specifies the technical requirements, inspection methods, inspection rules, marking, packaging, transport and storage for wedge-cross rolling blanks of camshafts for internal combustion engines.
This part replaces JB/T 8578-1997 'Internal combustion engines - Camshaft wedge-cross rolling blanks - Technical specification'.
Changed the straightness of camshaft blank to root circle journal runout, and modified the tolerance values;
Modified the camshaft width and axial dimension tolerances;
Modified the rust-proof period;
Standard Timeline
Changes from replaced version:
- 引用标准作了部分变动
- 将凸轮轴毛坯直线度改为根圆轴颈圆跳动，并修改了公差值
- 修改了凸轮轴宽度、轴向尺寸公差
- 修改了防锈期
- 标准格式作了编辑性修改
- Partial changes to referenced standards
- Changed the straightness of camshaft blank to root circle journal runout, and modified the tolerance values
- Modified the camshaft width and axial dimension tolerances
- Modified the rust-proof period
- Editorial modifications to the standard format