JB/T 54474-1999
Machine Vise - Product Quality Grading
机用虎钳 产品质量分等
Catalogue
前言 → 1 范围 → 2 引用标准 → 3 质量等级 Foreword → 1 Scope → 2 Normative References → 3 Quality Grades
Scope
This standard specifies the quality requirements for qualified products, first-grade products, and premium products of machine vises (hereinafter referred to as vises). This standard applies to the classification of product quality grades for vises.
本标准规定了机用虎钳（以下简称虎钳）的合格品、一等品、优等品的质量要求。本标准适用于虎钳产品质量等级的划分。
Normative References
Keywords
Application Summary AI generated
Manufacturers and quality inspection agencies of machine vises use this standard to classify product quality into grades: qualified, first-grade, and premium. It helps control key parameters such as accuracy, clamping force, and material properties during production. This standard serves as a basis for product assessment and pricing according to quality.
机用虎钳的制造商和质检机构使用本标准来划分产品质量等级，包括合格品、一等品和优等品。它帮助企业在生产过程中控制精度、夹紧力、材质等关键指标，确保产品达到相应的质量水平。该标准也是产品考核和优质优价的重要依据。
AI Summary AI generated
This standard specifies quality requirements for three grades of machine vises: qualified, first-grade, and premium. It covers basic parameters, accuracy, working performance, safety protection, accessories, appearance, marking and packaging, material and heat treatment, part machining, and assembly quality. Each grade has distinct requirements for accuracy reserve, clamping force torque reduction, hardness qualification rate, and sampling qualification rate. The standard is used for product quality assessment and grading.
本标准规定了机用虎钳的合格品、一等品和优等品三个质量等级的要求。内容涵盖基本参数、精度、工作性能、安全防护、附件工具、外观、标志包装、材质热处理、零件加工和装配质量等。各等级在精度储备量、夹紧力力矩减少比例、硬度合格率和零件抽查合格率上有不同要求。标准适用于产品质量考核和分等定级。
Key Sentences extracted from text
本标准规定了机用虎钳（以下简称虎钳）的合格品、一等品、优等品的质量要求。
精度应符合JB/T 2329—1996 中4.5 的规定。
夹紧力试验后复检精度仍达到合格品精度指标。
主要零件热处理部位的关键技术指标硬度合格率不低于90%（当被检件总项数较少，允许加大抽检数量，但不得多于20 项）。
主要零件及其主要项目抽查合格率不低于85%。
This standard specifies the quality requirements for qualified products, first-grade products, and premium products of machine vises (hereinafter referred to as vises).
Accuracy shall comply with the provisions of 4.5 in JB/T 2329-1996.
After the clamping force test, the rechecked accuracy still meets the qualified product accuracy index.
The hardness qualification rate of key technical indicators for heat-treated parts of main parts shall not be less than 90% (when the total number of inspected items is small, the sampling quantity may be increased, but not more than 20 items).
The sampling qualification rate of main parts and their main items shall not be less than 85%.
Standard Timeline
Changes from replaced version:
- 仅对原标准作了编辑性修改，主要技术内容未变
- Only editorial modifications were made to the original standard; the main technical content remains unchanged.