JB/T 54881-1999
Hand Taps - Product Quality Grading
手用丝锥 产品质量分等
Catalogue
前言 → 1 范围 → 2 引用标准 → 3 AQL 的指定值 → 4 RQL 的指定值 → 5 不合格分类及分组 → 6 寿命试验 Foreword → 1 Scope → 2 Normative References → 3 Specified AQL Values → 4 Specified RQL Values → 5 Classification and Grouping of Nonconformities → 6 Life Test
Scope
This standard specifies the AQL values for quality grade evaluation, RQL values for periodic stability assessment, classification of nonconformities, and life tests for hand taps and H4 nut taps when evaluated according to JB/T 54854. This standard applies to the quality grade evaluation and periodic stability assessment of hand taps and H4 nut taps produced in batches according to GB/T 967~969, GB/T 3464.1, GB/T 3464.3, and JB/T 8786.
本标准规定了手用丝锥和H4 螺母丝锥在依据JB/T 54854 进行质量等级评定时的AQL 值、周期稳定性考核时的RQL 值、不合格分类及寿命试验。本标准适用于按GB/T 967~969、GB/T 3464.1、GB/T 3464.3、JB/T 8786 成批生产的手用丝锥和H4螺母丝锥的质量等级评定和周期稳定性考核。
Normative References
Keywords
Application Summary AI generated
Tool manufacturers and quality inspection departments use this standard to evaluate the quality grade and periodic stability of hand taps and H4 nut taps. It sets AQL and RQL values, defines nonconformity classifications, and specifies life test conditions to ensure products meet different quality levels (qualified, first-class, premium). This standard is important for ensuring the reliability and consistency of tap products and for improving the overall quality level of the cutting tool industry.
刀具制造企业和质量检验部门使用本标准来对手用丝锥和H4螺母丝锥进行质量等级评定和周期稳定性考核。它通过设定AQL和RQL值、明确不合格分类以及规定寿命试验条件，确保产品符合不同等级（合格品、一等品、优等品）的质量要求。该标准对于保证丝锥产品的可靠性和一致性、提升刀具行业整体质量水平具有重要意义。
AI Summary AI generated
This standard specifies quality grading requirements for hand taps and H4 nut taps, including AQL values, RQL values, nonconformity classification, and life tests. It applies to quality grade evaluation and periodic stability assessment of products manufactured in batches according to relevant standards. Nonconformities are classified into Class B (three groups) and Class C, with different AQL and RQL values set for each grade (qualified, first-class, premium). The life test specifies conditions such as machine tool, test workpiece (45 steel, 170-200 HB), cutting parameters, and provides life criteria and indicators.
本标准规定了手用丝锥和H4螺母丝锥的质量分等要求，包括AQL值、RQL值、不合格分类及寿命试验。适用于按相关标准批量生产的产品质量等级评定和周期稳定性考核。标准将不合格分为B类（三组）和C类，并针对不同等级（合格品、一等品、优等品）设定了不同的AQL和RQL值。寿命试验规定了机床、试坯（45钢，170-200HB）、切削规范等条件，并给出了寿命判据和指标。
Key Sentences extracted from text
本标准规定了手用丝锥和H4 螺母丝锥在依据JB/T 54854 进行质量等级评定时的AQL 值、周期稳定性考核时的RQL 值、不合格分类及寿命试验。
本标准适用于按GB/T 967~969、GB/T 3464.1、GB/T 3464.3、JB/T 8786 成批生产的手用丝锥和H4螺母丝锥的质量等级评定和周期稳定性考核。
AQL 的指定值由表1 给出。
RQL 的指定值由表2 给出。
不合格分类及分组由表3 给出。
This standard specifies the AQL values for quality grade evaluation, RQL values for periodic stability assessment, classification of nonconformities, and life tests for hand taps and H4 nut taps when evaluated according to JB/T 54854.
This standard applies to the quality grade evaluation and periodic stability assessment of hand taps and H4 nut taps produced in batches according to GB/T 967~969, GB/T 3464.1, GB/T 3464.3, and JB/T 8786.
The specified AQL values are given in Table 1.
The specified RQL values are given in Table 2.
The classification and grouping of nonconformities are given in Table 3.
Standard Timeline
Changes from replaced version:
- 根据相应的手用丝锥产品标准作了修改
- 将个别评定项目由B类不合格Ⅰ组调整到B类不合格Ⅱ组
- 对B类不合格Ⅱ组的RQL值作了相应的调整
- 增加了对B类不合格Ⅱ组允许按特殊检查水平的规定
- 本标准包括H4螺母丝锥的质量分等
- Modified according to the corresponding hand tap product standards
- Adjusted some evaluation items from Class B nonconformity Group I to Class B nonconformity Group II
- Adjusted the RQL values for Class B nonconformity Group II accordingly
- Added provision allowing special inspection level for Class B nonconformity Group II
- This standard includes quality grading for H4 nut taps