GB/T 28878.3-2016 in English
VALIDSpecification of the rotating component in space science experiments—Part 3：Ball bearing acceptance
- Issued on:2016-08-29
- Implemented on:2016-11-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
$146.00
《GB/T 28878.3-2016空间科学实验转动部件规范 第3部分：滚动轴承验收》由TC312（全国空间科学及其应用标准化技术委员会）归口，主管部门为中国科学院。
Introduction
Interpretation of the acceptance specifications for rolling bearings in space science experiments
| Standard dimensions | GB/T28878.3-2016 requirements | Comparison of technical conditions with GJB269 |
|---|---|---|
| Technical requirements | Specifies the acceptance conditions, processes, requirements and methods for rolling bearings, which are applicable to space science experimental devices. | GJB269 emphasizes the technical indicators of aviation rolling bearings, which are consistent with the high-precision requirements of this standard. |
| Test environment | Requires cleanliness level ISO7 or above, and strict control of temperature and humidity (15℃~25℃, 40%~60% relative humidity). | GJB269 does not specify environmental requirements, but emphasizes anti-rust and packaging protection measures. |
| Inspection process | Includes multi-dimensional inspections such as appearance quality, dimensional tolerance, rotation accuracy, and provides a detailed sampling plan. | GJB269 focuses on material heat treatment and surface treatment processes, which complement the inspection requirements of this standard. |
Case Study: Challenges in the Practical Application of Space Bearings
Background:In a certain aerospace project, researchers found that the rotation accuracy of a batch of rolling bearings did not meet the standards, resulting in unstable operation of the experimental device.
Problem Analysis:Through testing, it was found that the main reason was that the bearing clearance was too large and the surface roughness did not meet the standards. The specific manifestations are:
- Exceeding the standard clearance: the actual value is 0.015mm, which exceeds the standard requirement of 0.012mm.
- Surface roughness: the raceway Ra max is 0.063μm, while the standard requirement is 0.040μm.
Solution:Ensure that the clearance and surface roughness meet the standards by optimizing the processing technology and heat treatment process. At the same time, strengthen process control in subsequent production to avoid similar problems.
Implementation suggestions
1. Strengthen supplier management:Establish a strict supplier screening mechanism to ensure that the quality of raw materials and process level meet the standard requirements.
2. Improve detection methods:Equip with advanced measuring equipment, such as high-precision three-coordinate measuring machines and surface profilers, to ensure that all parameters meet the standards.
3. Optimize process management:Develop detailed acceptance operating procedures, clarify the responsible persons and time nodes of each link, and avoid quality problems caused by process omissions.
4. Establish a traceability mechanism:Establish quality files for each batch of bearings, record the entire process of production, testing and delivery, and facilitate problem tracking and improvement.
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