JB/T 54844-1999
Planer-type Milling Machines - Product Quality Grading
龙门铣床 产品质量分等
Catalogue
前言 → 1 范围 → 2 引用标准 → 3 质量等级 → 附录A（标准的附录） 龙门铣床精度三级分等表 → 附录B（标准的附录） 龙门铣床的补充试验 Foreword → 1 Scope → 2 Normative References → 3 Quality Grades → Annex A (Normative) Three-level Accuracy Grading Table for Planer-type Milling Machines → Annex B (Normative) Supplementary Tests for Planer-type Milling Machines
Scope
This standard specifies the product quality grade requirements for general-purpose planer-type milling machines and planer-type boring-milling machines with movable worktable. This standard is applicable to general-purpose planer-type milling machines and planer-type boring-milling machines with movable worktable having worktable surface width of 1000~5000 mm.
本标准规定了一般用途的工作台移动式龙门铣床和龙门镗铣床的产品质量等级要求。 本标准适用于工作台台面宽度1000~5000 mm 的一般用途工作台移动式龙门铣床和龙门镗铣床。
Normative References
Keywords
Application Summary AI generated
This standard is used by machine tool manufacturers, quality inspection agencies, and customers to grade and evaluate the quality of planer-type milling and boring-milling machines. It defines three quality levels—qualified, first-grade, and premium—with specific technical requirements for accuracy, performance, safety, and durability. The standard is important for ensuring product consistency, supporting quality-based pricing, and enhancing the competitiveness of domestic machine tools.
该标准由机床制造商、质量检验机构和用户使用，用于对龙门铣床和龙门镗铣床进行质量分等和考核。它通过规定合格品、一等品和优等品三个等级的具体技术指标，帮助评估机床的精度、性能、安全性和寿命。该标准对于确保产品质量、促进优质优价以及提升国产机床的市场竞争力具有重要意义。
AI Summary AI generated
This standard JB/T 54844-1999 specifies product quality grading requirements for planer-type milling machines and planer-type boring-milling machines with movable worktable (worktable width 1000-5000 mm). It defines three quality grades: qualified, first-grade, and premium-grade. The grading covers 14 inspection items across three categories: finished product inspection (general requirements, accuracy, performance, functional reliability and stability, service life, safety and health, completeness, appearance, and packaging), production process quality inspection (material and heat treatment, part machining quality, assembly quality, painting and rust prevention), and user service and feedback. The standard references numerous related national and industry standards and includes two normative annexes.
本标准JB/T 54844-1999规定了工作台移动式龙门铣床和龙门镗铣床（工作台宽度1000-5000 mm）的产品质量分等要求。标准将产品质量分为合格品、一等品和优等品三个等级，涵盖成品检验（一般要求、精度、工作性能、功能可靠与稳定、寿命、安全卫生、配套性、外观和包装）、生产过程质量检验（材质及热处理、零件加工质量、装配质量、涂漆与防锈）以及用户服务与反馈共14个检查项目。标准引用了大量相关国家标准和行业标准，并包含两个规范性附录。
Key Sentences extracted from text
本标准规定了一般用途的工作台移动式龙门铣床和龙门镗铣床的产品质量等级要求。
机床精度应符合JB/T 3028 及其附录的规定。
在两班工作制和遵守使用规则的条件下，机床精度保持在机床精度检验标准规定范围内的时间为2 年。
在空运转条件下，机床的噪声声压级不应超过85dB(A)。
本标准按“成品检验”、“生产过程的质量检验”和“用户服务与反馈”三方面共14 项对产品进行质量分等。
This standard specifies the product quality grade requirements for general-purpose planer-type milling machines and planer-type boring-milling machines with movable worktable.
Machine tool accuracy shall comply with the provisions of JB/T 3028 and its appendices.
Under the conditions of two-shift operation and compliance with operating rules, the time during which the machine tool accuracy is maintained within the range specified by the machine tool accuracy inspection standard is 2 years.
Under no-load operation conditions, the sound pressure level of the machine tool noise shall not exceed 85 dB(A).
This standard grades product quality according to 14 items in three aspects: 'finished product inspection', 'production process quality inspection', and 'user service and feedback'.
Standard Timeline
Changes from replaced version:
- 第2章“引用标准”作了较大修改
- 由于“引用标准”的修改，有关的技术内容也作了相应的增减
- “安全卫生”一章中增加了“一般应有符合安全设计的三级防护措施”的要求，其有关条文也作了适当的调整
- 按有关规定进行了编辑性修改
- Chapter 2 'Normative References' has been significantly revised
- Due to the revision of 'Normative References', relevant technical content has been correspondingly added or removed
- In the 'Safety and Health' chapter, the requirement 'generally should have three-level protective measures conforming to safety design' has been added, and relevant clauses have been appropriately adjusted
- Editorial modifications have been made in accordance with relevant regulations