JB/T 54477-1999
Fixed Centers - Product Quality Grading
固定顶尖 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 → Annex A
Scope
This standard specifies the quality grade assessment and requirements for fixed centers. This standard is applicable to the quality inspection and grading of fixed centers.
本标准规定了固定顶尖产品的质量等级评定和要求。本标准适用于固定顶尖产品质量考核和分等定级。
Normative References
Keywords
Application Summary AI generated
Quality inspectors in the machine tool and machine tool accessories industry use this standard to grade fixed centers. They apply it to classify products into qualified, first-grade, and superior grades based on geometric accuracy and other criteria. This standard is important for ensuring consistent product quality, enabling price differentiation based on quality, and guiding manufacturers in process improvement.
机械制造和机床附件行业的质量检验人员使用本标准来评定固定顶尖产品的质量等级。他们依据本标准对产品进行合格品、一等品和优等品的分级，以确定产品是否达到相应的质量要求。该标准对于确保固定顶尖产品的质量一致性、促进优质优价以及指导企业改进生产工艺具有重要意义。
AI Summary AI generated
This standard JB/T 54477-1999 specifies the quality grade assessment and requirements for fixed centers, applicable to product quality inspection and grading. It defines three quality grades: qualified, first-grade, and superior, each with specific criteria for geometric accuracy, Morse taper contact length, and surface roughness. Annex A provides detailed quality index tables. This standard supplements and specifies JB/T 54471-1994 and replaces JB/T 54477-94 upon implementation.
本标准JB/T 54477-1999规定了固定顶尖产品的质量等级评定和要求，适用于产品质量考核和分等定级。标准将产品分为合格品、一等品和优等品三个等级，每个等级对几何精度、莫氏圆锥接触长度、表面粗糙度等有具体指标。附录A给出了各等级的质量指标表格。该标准是对JB/T 54471-1994的补充和具体化，自实施之日起代替JB/T 54477-94。
Key Sentences extracted from text
本标准规定了固定顶尖产品的质量等级评定和要求。
固定顶尖产品的质量等级分为合格品、一等品、优等品。
几何精度应符合附录A（标准的附录）表A1中一等品的要求。
表面粗糙度Ra值应小于附录A表A3中一等品的要求。
硬质合金顶尖焊缝表面不应有气孔、夹渣等缺陷。
This standard specifies the quality grade assessment and requirements for fixed centers.
The quality grades of fixed centers are divided into qualified product, first-grade product, and superior product.
Geometric accuracy shall meet the requirements for first-grade product in Table A1 of Annex A (normative annex).
The surface roughness Ra value shall be less than the requirements for first-grade product in Table A3 of Annex A.
The weld surface of carbide-tipped centers shall have no defects such as porosity or slag inclusion.
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.