JB/T 54818-1999
Milling Chuck - Product Quality Grading
铣夹头 产品质量分等
Catalogue
前言 → 1 范围 → 2 引用标准 → 3 质量等级评定 → 4 质量等级 → 附录A Foreword → 1 Scope → 2 Normative References → 3 Quality Grade Assessment → 4 Quality Grades → Appendix A
Scope
This standard specifies the quality grade assessment and requirements for milling chuck products. This standard is applicable to the quality evaluation and grading of milling chuck products.
本标准规定了铣夹头产品的质量等级评定和要求。本标准适用于铣夹头产品质量考核和分等定级。
Normative References
Keywords
Application Summary AI generated
Manufacturers of milling chucks and quality inspection departments use this standard to evaluate product quality grades. By classifying products into qualified, first-grade, and premium-grade levels, it provides a unified basis for quality assessment and grading. This standard helps drive quality improvement and supports a pricing system that rewards higher quality.
铣夹头生产企业和质量检验部门使用本标准来评定产品的质量等级。通过将产品分为合格品、一等品和优等品，本标准为产品质量考核和分等定级提供了统一依据。它有助于推动企业提高产品质量，实现优质优价。
AI Summary AI generated
This standard establishes a quality grading system for milling chuck products, classifying them into three levels: qualified, first-grade, and premium-grade. Qualified products require a pass rate of over 90% for key heat treatment indicators and over 85% for sampling of main components. First-grade products demand a 20% accuracy reserve and over 95% pass rate for heat treatment indicators. Premium-grade products require a 30% accuracy reserve and 100% pass rate for heat treatment. The standard also specifies taper contact ratio requirements and provides a basis for quality assessment and grading.
本标准规定了铣夹头产品的质量等级评定体系，将产品分为合格品、一等品和优等品三个等级。合格品要求热处理关键指标合格率90%以上、主要零件抽查合格率85%以上；一等品要求20%精度储备量、热处理指标合格率95%以上；优等品要求30%精度储备量、热处理指标100%合格。标准还规定了锥体接触比等具体检验要求，为产品质量考核和分等定级提供了依据。
Key Sentences extracted from text
本标准规定了铣夹头产品的质量等级评定和要求。
主要零件的热处理部位的关键技术指标（指硬度和金相）合格率达90%以上。
几何精度应有20%的精度储备量。
锥体用量规做涂色法检验，接触比值应不低于80%，JT 型不低于85%。
主要零件及其主要项目抽查合格率不低于95%。
This standard specifies the quality grade assessment and requirements for milling chuck products.
The key technical indicators (hardness and metallographic structure) of heat-treated parts of main components shall have a pass rate of over 90%.
Geometric accuracy shall have a 20% accuracy reserve.
When checking the taper with a gauge using the coating method, the contact ratio shall be no less than 80%, and for JT type no less than 85%.
The sampling pass rate for main components and their main items shall be no less than 95%.
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 changes were made to the original standard; the main technical content remained unchanged.