JB/T 51145-1999
Construction Machinery - Door Locks - Product Quality Grading (Internal Use)
工程机械 门锁 产品质量分等（内部使用）
Catalogue
前言 → 1 范围 → 2 引用标准 → 3 一般要求 → 4 质量分等原则 → 5 质量分等指标 → 6 试验方法 → 7 检验规则 Foreword → 1 Scope → 2 Normative References → 3 General Requirements → 4 Quality Grading Principles → 5 Quality Grading Indicators → 6 Test Methods → 7 Inspection Rules
Scope
This standard specifies the product quality grading indicators, test methods, and inspection rules for construction machinery door locks. This standard applies to product quality grading and quality supervision management of construction machinery door locks.
本标准规定了工程机械门锁的产品质量分等指标、试验方法和检验规则。本标准适用于工程机械门锁的产品质量分等和质量监督管理。
Normative References
Keywords
Application Summary AI generated
Manufacturers of construction machinery door locks use this standard to grade their products, ensuring they meet superior, first, or qualified grade requirements. Quality supervision authorities rely on this standard for inspection and evaluation, safeguarding the safety and reliability of construction machinery. By providing unified grading indicators and test methods, this standard helps elevate the overall quality level of the industry.
工程机械门锁制造商使用本标准对产品进行质量分等，确保产品符合优等品、一等品或合格品的要求。质量监督部门依据本标准对门锁产品进行检验和评定，以保障工程机械的安全性和可靠性。该标准通过统一的分等指标和试验方法，促进了行业质量水平的提升。
AI Summary AI generated
This standard specifies product quality grading indicators, test methods, and inspection rules for construction machinery door locks, applicable to quality grading and supervision management. It classifies door locks into three grades: superior, first, and qualified, covering indicators such as security, durability, robustness, flexibility, appearance, salt spray test for plated parts, latch bolt extension length, and user feedback. Test methods reference JB/T 5934, and inspection rules adopt the double sampling plan from GB/T 2829. This standard is a consolidated revision of JB/T 51145.1-94 and JB/T 51145.2-94, with a main modification to the latch bolt extension distance.
本标准规定了工程机械门锁的产品质量分等指标、试验方法和检验规则，适用于门锁的质量分等和监督管理。标准将门锁分为优等品、一等品和合格品三个等级，涵盖保密度、耐用度、牢固度、灵活度、外观质量、电镀件盐雾试验、锁舌伸出长度及用户意见等多项指标。试验方法引用JB/T 5934，检验规则采用GB/T 2829的二次抽样方案。本标准是对JB/T 51145.1-94和JB/T 51145.2-94的合并修订，主要修改了斜舌伸出距离。
Key Sentences extracted from text
本标准规定了工程机械门锁的产品质量分等指标、试验方法和检验规则。
工程机械门锁按质量指标分为优等品，一等品和合格品三个等级。
本标准采用GB/T 2829 中规定的二次抽样方案，使用判别水平Ⅲ，样本大小n、不合格质量水平RQL、合格判定数Ac、不合格判定数Re见表10。
外观质量分等指标的评定采用打分法，由熟悉本专业的至少五位评分人员同时分别给出评定分数，去掉一个最高分和一个最低分，然后取平均值，该平均值即为外观质量的得分。
本标准自实施之日起代替JB/T 51145.1—94 和JB/T 51145.2—94。
This standard specifies the product quality grading indicators, test methods, and inspection rules for construction machinery door locks.
Construction machinery door locks are divided into three grades according to quality indicators: superior grade, first grade, and qualified grade.
This standard adopts the double sampling plan specified in GB/T 2829, using discrimination level III, with sample size n, rejectable quality level RQL, acceptance number Ac, and rejection number Re as shown in Table 10.
The evaluation of appearance quality grading indicators adopts a scoring method, where at least five evaluators familiar with the specialty simultaneously give scores, removing the highest and lowest scores, and then taking the average as the appearance quality score.
This standard replaces JB/T 51145.1-94 and JB/T 51145.2-94 from the date of implementation.
Standard Timeline
Changes from replaced version:
- 将原两项标准合并为一项标准
- 对原标准中斜舌伸出锁体的距离作了修改
- Merged the two original standards into one standard
- Modified the distance of the latch bolt extending out of the lock body from the original standard