JB/T 54840-1999
Air Impact Molding Machine - Product Quality Grading
气流冲击造型机 产品质量分等
Catalogue
前言 → 1 范围 → 2 引用标准 → 3 产品质量的等级 → 4 产品质量分等要求 → 5 试验方法 → 6 抽样、评定方法 Foreword → 1 Scope → 2 Normative References → 3 Product Quality Grades → 4 Product Quality Grading Requirements → 5 Test Methods → 6 Sampling and Evaluation Methods
Scope
This standard specifies the product quality grades, product quality grading requirements, test methods, and evaluation methods for air impact molding machines. This standard is applicable to evaluating the product quality grade level of batch-produced air impact molding machines (hereinafter referred to as machines).
本标准规定了气流冲击造型机产品质量等级、产品质量分等要求、试验方法和评定方法等。本标准适用于评定批量生产的气流冲击造型机（以下简称机器）产品质量等级水平。
Normative References
Keywords
Application Summary AI generated
Foundry machinery manufacturers and quality inspection departments use this standard to evaluate the quality grade of batch-produced air impact molding machines. By defining three quality levels—qualified, first-class, and premium—it helps companies control product quality and enhance competitiveness. This standard provides a unified quality evaluation basis for the industry, promoting standardization and reliability improvement of foundry machinery products.
铸造机械制造企业和质量检验部门使用本标准，对批量生产的气流冲击造型机进行质量等级评定。通过划分合格品、一等品和优等品三个等级，帮助企业控制产品质量、提升竞争力。该标准为行业提供了统一的质量评价依据，促进了铸造机械产品的标准化和可靠性提升。
AI Summary AI generated
This standard specifies product quality grading requirements for air impact molding machines, classifying products into three grades: qualified, first-class, and premium. It covers multiple aspects including operational performance, precision, reliability, safety, and assembly quality, with specific technical indicators such as pressure rise rate, hardness, noise limits, and impact valve service life. Applicable to quality evaluation of batch-produced air impact molding machines, it provides a unified quality grading basis for the foundry machinery industry.
本标准规定了气流冲击造型机的产品质量分等要求，将产品分为合格品、一等品和优等品三个等级。标准涵盖使用性能、运行性能、精度、可靠性、安全卫生、装配质量等多个方面，并设定了具体技术指标如升压速率、硬度、噪声限值、冲击阀寿命等。适用于批量生产的气流冲击造型机的质量评定，为铸造机械行业提供了统一的质量分级依据。
Key Sentences extracted from text
本标准规定了气流冲击造型机产品质量等级、产品质量分等要求、试验方法和评定方法等。
机器的余隙内平均升压速率应不低于23MPa/s。
砂型分型面平均硬度不应低于85单位（B型硬度计，下同），垂直面不低于80单位。
在正常使用条件下，冲击阀寿命不应低于50万次。
在负载条件下机器的噪声应≤85dB(A)。
This standard specifies the product quality grades, product quality grading requirements, test methods, and evaluation methods for air impact molding machines.
The average pressure rise rate in the clearance of the machine shall not be less than 23 MPa/s.
The average hardness of the mold parting surface shall not be less than 85 units (B-type hardness tester, the same below), and the vertical surface shall not be less than 80 units.
Under normal use conditions, the service life of the impact valve shall not be less than 500,000 cycles.
Under load conditions, the noise of the machine shall be ≤85 dB(A).
Standard Timeline
Changes from replaced version:
- 本标准是对JB/T 54840—93的修订
- 修订时仅按有关规定重新进行了编辑，技术内容没有变化
- This standard is a revision of JB/T 54840-93
- The revision only re-edited according to relevant regulations, with no changes in technical content