JB/T 54279-1999
Product Quality Grading for Measuring Tools and Instruments - Point Micrometer (Internal Use)
量具量仪产品质量分等 尖头千分尺（内部使用）
Catalogue
前言 → 1 范围 → 2 引用标准 → 3 合格品 → 4 一等品 → 5 优等品 → 6 等级评定 Foreword → 1 Scope → 2 Normative References → 3 Qualified Product → 4 First-Class Product → 5 Premium Product → 6 Grade Evaluation
Scope
This standard specifies the quality indicators for qualified products, first-class products, and premium products of point micrometers. This standard is applicable to the quality grade evaluation of point micrometers produced in batches.
本标准规定了尖头千分尺的合格品、一等品和优等品的各项质量指标。本标准适用于成批生产的尖头千分尺质量等级的评定。
Normative References
Keywords
Application Summary AI generated
Quality inspectors in the machinery manufacturing and metrology industries use this standard to evaluate the quality grades of point micrometers. They classify products as qualified, first-class, or premium based on the specified indicators. This standard ensures consistent quality of point micrometers and provides a unified basis for production acceptance and user selection.
机械制造和计量行业的质量检验人员使用该标准来评定尖头千分尺的质量等级。他们依据标准中的各项指标对产品进行合格品、一等品和优等品的分类。该标准确保了尖头千分尺的质量一致性，为生产验收和用户选型提供了统一依据。
AI Summary AI generated
This standard JB/T 54279-1999 specifies quality grading requirements for point micrometers, including three grades: qualified, first-class, and premium. Qualified products must meet the basic requirements of GB/T 6313, with A, B, and C nonconformity categories for indication error, appearance, interaction, hardness, surface roughness, etc. First-class products compress the indication error by 15% and add pitch error and cleanliness requirements. Premium products further compress indication error by 25%, require higher pitch accuracy and cleanliness, and pass life tests and marking process verification. The standard is applicable to quality grade evaluation of point micrometers produced in batches.
本标准JB/T 54279-1999规定了尖头千分尺的质量分等要求，包括合格品、一等品和优等品三个等级。合格品需满足GB/T 6313的基本要求，并对示值误差、外观、相互作用、硬度、表面粗糙度等多项指标进行A、B、C三类不合格判定。一等品在合格品基础上将示值误差压缩15%，并增加螺距误差和清洁度要求。优等品进一步压缩示值误差25%，要求更高的螺距精度和清洁度，并通过寿命试验和刻线工艺验证。标准适用于成批生产的尖头千分尺质量等级评定。
Key Sentences extracted from text
本标准规定了尖头千分尺的合格品、一等品和优等品的各项质量指标。
尖头千分尺的示值误差见表1的规定。
测微螺杆移动应平稳，无卡滞现象，其轴向和径向间隙应不大于0.01 mm。
将尖头千分尺合格品的示值误差压缩15%。
尖头千分尺测微螺杆经30万次寿命试验后，其示值误差应不超过优等品规定的要求；棘轮经150万次寿命试验后，其测力和测力变化应不超过规定的要求，其合格率为100%。
This standard specifies the quality indicators for qualified products, first-class products, and premium products of point micrometers.
The indication error of the point micrometer is specified in Table 1.
The movement of the micrometer screw shall be smooth without sticking, and its axial and radial clearance shall not exceed 0.01 mm.
Compress the indication error of the qualified point micrometer by 15%.
After 300,000 cycles of life test, the indication error of the point micrometer screw shall not exceed the requirements specified for premium products; after 1.5 million cycles of life test on the ratchet, its measuring force and force variation shall not exceed the specified requirements, and the pass rate shall be 100%.
Standard Timeline
Changes from replaced version:
- 本标准与JB/T 54279—94的技术内容一致，仅按有关规定重新进行了编辑。
- The technical content of this standard is consistent with JB/T 54279-94, only re-edited according to relevant regulations.