JB/T 54276-1999
Product Quality Grading for Measuring Tools and Instruments - Odd Flute Micrometer (Internal Use)
量具量仪产品质量分等 奇数沟千分尺（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 odd flute micrometers. This standard is applicable to the quality grade evaluation of odd flute micrometers produced in batches.
本标准规定了奇数沟千分尺的合格品、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奇数沟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 odd flute micrometers. They classify products as qualified, first-class, or premium based on the indicators specified in this standard. This standard ensures consistent quality of odd flute 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本标准来评定奇数沟千分尺的质量等级。他们依据本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。该标准确保了奇数沟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 specifies quality indicators for qualified, first-class, and premium grades of odd flute micrometers, applicable to batch production quality evaluation. It details requirements for Class A (critical), Class B (major), and Class C (minor) nonconformities, including indication error, parallelism, appearance, interaction, graduation line width, measuring force, and setting standards. First-class and premium products have stricter requirements on indication error, lead error, cleanliness, and life tests. Grade evaluation follows JB/T 54247.2.
本标准规定了奇数沟千分尺的合格品、一等品和优等品的质量指标，适用于成批生产的质量等级评定。标准详细列出了A类（致命缺陷）、B类（重缺陷）和C类（轻缺陷）不合格项的具体要求，包括示值误差、平行度、外观、相互作用、刻线宽度、测力、校对量柱等。一等品和优等品在示值误差、螺距误差、清洁度和寿命试验等方面有更严格的要求。等级评定依据JB/T 54247.2进行。
Key Sentences extracted from text
本标准规定了奇数沟千分尺的合格品、一等品和优等品的各项质量指标。
奇数沟千分尺的示值误差和测微螺杆测量面对测砧两测量面交线的平行度公差见表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。
奇数沟千分尺测微螺杆经30万次寿命试验后，其示值误差应不超过一等品规定的要求；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，其合格率不低于67%。
奇数沟千分尺产品的等级评定按照JB/T 54247.2的规定进行。
This standard specifies the quality indicators for qualified products, first-class products, and premium products of odd flute micrometers.
The indication error of the odd flute micrometer and the parallelism tolerance between the measuring face of the micrometer screw and the intersection line of the two measuring faces of the anvil are 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.
After 300,000 cycles of life test on the micrometer screw of the odd flute micrometer, its indication error shall not exceed the requirements specified for first-class products; after 1,500,000 cycles of life test on the ratchet, its measuring force and measuring force variation shall not exceed the specified requirements, and the pass rate shall not be less than 67%.
The grade evaluation of odd flute micrometer products shall be carried out in accordance with JB/T 54247.2.
Standard Timeline
Changes from replaced version:
- 本标准与JB/T 54276—94的技术内容一致，仅按有关规定重新进行了编辑。
- This standard is consistent with the technical content of JB/T 54276-94, only re-edited according to relevant regulations.