航天推进技术研究院主办
[1]杨 祎,王吉平,董继业,等.膜片隔离阀脉冲激光焊接工艺分析[J].火箭推进,2023,49(02):107-114.
YANG Yi,WANG Jiping,DONG Jiye,et al.Analysis on pulse laser welding for membrane isolation valve[J].Journal of Rocket Propulsion,2023,49(02):107-114.
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YANG Yi,WANG Jiping,DONG Jiye,et al.Analysis on pulse laser welding for membrane isolation valve[J].Journal of Rocket Propulsion,2023,49(02):107-114.
膜片隔离阀脉冲激光焊接工艺分析
《火箭推进》[ISSN:1672-9374/CN:CN 61-1436/V]
卷:
49
期数:
2023年02期
页码:
107-114
栏目:
目次
出版日期:
2023-04-25
- Title:
- Analysis on pulse laser welding for membrane isolation valve
- 文章编号:
- 1672-9374(2023)02-0107-08
- Keywords:
- membrane isolation valve; orthogonal test; pulse laser welding; weld quality; modified power density
- 分类号:
- TG456.7
- 文献标志码:
- A
- 摘要:
- 膜片隔离阀广泛应用于单组元液体火箭发动机,金属膜片和壳体的激光焊接是该产品需重点关注的工艺过程。通过分析产品焊接结构,得出宜采用热导焊、短焦镜头和低峰值功率进行膜片隔离阀脉冲激光焊接的结论。设计脉冲宽度、脉冲频率、重叠系数和离焦量的4因素正交试验,通过分析焊缝外观质量和接头熔深,获得各因素影响焊缝熔深的主次顺序及适用于膜片隔离阀的激光焊接参数。提出采用修正功率密度综合表征脉冲能量和离焦量对熔深的影响,分析结果表明,焊缝熔深随着修正功率密度的增加而增大,膜片隔离阀需选取较小修正功率密度和较低焊接速率或者较大修正功率密度和较高焊接速率来满足其性能要求。采用正交试验获得的激光焊接工艺规范所生产的膜片隔离阀,焊缝质量、密封质量和破裂压力稳定性均能满足设计要求。目前,膜片隔离阀已配套至多种型号飞行产品,并通过了飞行及试车考核。
- Abstract:
- Membrane isolation valve is widely used in monopropellant liquid rocket engines, and the laser welding for the metal membrane and the shell is an important process that should be focused on.By analyzing the structure of the product, it is concluded that the thermal conductivity pulse welding is suitable for the membrane isolation valve.As meanwhile, the conclusion of selecting short focal lens and lower peak power can ensure the quality of the welded joint was also obtained.To obtain the influences of parameters of pulse width, pulse frequency, overlap factor and welding frequency on weld penetration, orthogonal test was designed.By analyzing appearance and penetration of the welded joint, the primary sequence of four parameters and matched process parameters for membrane isolation valve were obtained.The modified power density was proposed to characterize the impaction of pulse energy and defocusing amount on weld penetration.The results show that weld penetration increases with the increasing of the modified power density.In addition, it is concluded that lower modified power density and slower welding rate or higher modified power density and faster welding rate should be used on the pulse laser welding of the membrane isolation valve.The membrane isolation valves produced by the process parameters based on the orthogonal test can satisfy the designing requirements on quality of welded joint, sealing property and the stability of rupture pressure.Currently, the products have been used in a variety of flight products, and passed the tests and flight assessments.
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备注/Memo
收稿日期:2021-07-18; 修回日期:2021-10-10
基金项目:国家自然科学基金(52005385)
作者简介:杨祎(1992—),女,硕士,工程师,研究领域为激光精密制造。
更新日期/Last Update:
1900-01-01