JB/T 51240-1999
Roller Tea Cutting Machine - Product Quality Grading
辊式切茶机 产品质量分等
Catalogue
前言 → 1 范围 → 2 引用标准 → 3 质量指标 → 4 试验方法 → 5 检验规则 Foreword → 1 Scope → 2 Normative References → 3 Quality Indicators → 4 Test Methods → 5 Inspection Rules
Scope
This standard specifies the quality grade indicators, test methods, and inspection rules for roller tea cutting machine products. This standard applies to the quality grading of roller tea cutting machines (hereinafter referred to as roller cutters).
本标准规定了辊式切茶机产品的质量等级指标、试验方法和检验规则。本标准适用于辊式切茶机（以下简称辊切机）产品的质量分等。
Normative References
Keywords
Application Summary AI generated
Tea processing enterprises use this standard to grade the quality of roller tea cutting machines, determining whether products meet qualified or first-class levels. Quality inspection departments and manufacturers rely on the performance indicators, reliability requirements, and inspection rules in this standard to evaluate equipment quality. This standard helps regulate the roller tea cutting machine market and improve the overall quality of tea processing equipment.
茶叶加工企业使用该标准对辊式切茶机进行质量分等，以确定产品是否达到合格品或一等品水平。质检部门和制造商依据本标准中的性能指标、可靠性要求和检验规则来评估设备质量。该标准有助于规范辊式切茶机市场，提升茶叶加工设备的整体质量水平。
AI Summary AI generated
JB/T 51240-1999 'Roller Tea Cutting Machine - Product Quality Grading' specifies quality grade indicators, test methods, and inspection rules for roller tea cutting machines. The standard classifies products into qualified and first-class grades, covering overall performance (e.g., primary cutting rate, broken tea rate, productivity, noise), reliability (availability, mean time to first failure), assembly quality, and appearance quality. Test methods include performance tests, reliability tests, and assembly quality checks. Inspection rules follow GB/T 2828 sampling, with nonconformities categorized into A, B, and C classes for judgment. This standard applies to quality grading of roller tea cutting machines, aiming to improve the quality of tea processing equipment.
JB/T 51240-1999《辊式切茶机 产品质量分等》规定了辊式切茶机的质量等级指标、试验方法和检验规则。标准将产品分为合格品和一等品，涵盖整机性能（如一次切断率、碎茶率、生产率、噪声）、可靠性（有效度、首次故障前工作时间）、装配质量和外观质量等要求。试验方法包括性能试验、可靠性试验和装配质量检测。检验规则采用GB/T 2828抽样，按A、B、C三类不合格项目进行判定。该标准适用于辊式切茶机的质量分等，旨在提升茶叶加工设备质量。
Key Sentences extracted from text
本标准规定了辊式切茶机产品的质量等级指标、试验方法和检验规则。
辊切机在切制三级五等毛茶经4.75 mm（4 目）筛网的平面圆筛第一次筛分的头子茶时，整机性能质量指标的分等应符合表1 的规定。
辊切机产品有效度应符合表2 的规定。
切刀与辊筒有效长度表面的间隙差，合格品不得大于0.60mm，一等品不得大于0.50mm。
采用随机抽样，在工厂近一年内生产的产品中随机抽取。
This standard specifies the quality grade indicators, test methods, and inspection rules for roller tea cutting machine products.
When the roller cutter processes third-grade fifth-class raw tea that has passed through a 4.75 mm (4 mesh) sieve in the first sifting of a plane circular sieve, the overall performance quality indicators shall comply with the provisions of Table 1.
The availability of roller cutter products shall comply with the provisions of Table 2.
The gap difference between the cutter and the effective length surface of the roller shall not exceed 0.60 mm for qualified products and 0.50 mm for first-class products.
Random sampling shall be adopted, and samples shall be randomly selected from products produced by the factory within the past year.
Standard Timeline
Changes from replaced version:
- 增加了性能指标的试验条件
- 调整了可靠性指标
- Added test conditions for performance indicators
- Adjusted reliability indicators