JB/T 54901-1999

Manufacturers of cemented carbide blades use this standard to grade their products into qualified, first-class, and premium quality levels. Quality inspection departments and customers rely on the AQL and RQL values specified here for sampling inspection and periodic stability assessment, ensuring blades meet required quality criteria. This standard is essential for maintaining reliability and consistency of cemented carbide blades in machining operations.

硬质合金刀片的生产企业使用本标准来对其产品进行质量等级划分，包括合格品、一等品和优等品。质检部门和用户依据本标准中的AQL值和RQL值进行抽样检验和周期稳定性考核，以确保刀片符合规定的质量要求。该标准对于保证硬质合金刀片在机械加工中的可靠性和一致性至关重要。

This standard specifies methods for quality grade evaluation of cemented carbide indexable inserts and brazed tips, including AQL values, RQL values, nonconformity classification, and life tests. It applies to blades produced in batches according to relevant national standards. Products are classified into qualified, first-class, and premium grades, with strict sampling plans and life test conditions (e.g., cutting speed, feed rate) for different nonconformity categories (Class B, Class C). Appendix A provides principles for dividing blade units.

本标准规定了硬质合金可转位刀片和焊接刀片的质量等级评定方法，包括AQL值、RQL值、不合格分类及寿命试验。适用于按相关国家标准成批生产的刀片。标准将产品分为合格品、一等品和优等品，并针对不同类别的不合格项（B类、C类）设定了严格的抽样方案和寿命试验条件，如切削速度、进给量等。附录A提供了刀片单元划分原则。