摘要
金属—氟塑料复合密封结构多用于液体火箭发动机阀门中,金属与氟塑料相接处一般有V形槽过渡,加工金属—氟塑料复合V形槽过程容易发生飞溅而出的铁屑损伤氟塑料表面或表面粗糙度差。为解决这一问题,通过分析金属—氟塑料复合密封结构特点,总结传统机械加工工艺的缺点,优化切削路线,设计刀具参数,采用有限元仿真技术,利用三维仿真软件DEFORM模拟切削过程,计算切削过程的平均切削力,并通过正交试验法,对模拟结果进行优选。最终从工艺方法、刀具参数、切削参数3个方面改进了金属—氟塑料复合V形槽加工方法。提出的改进方案解决了金属—氟塑料复合V形槽加工过程铁屑飞溅问题,提升了金属—氟塑料复合阀芯生产合格率,这套改进方案已应用于多种复合式阀芯生产过程。
The metal-fluoroplastic composite sealing structure is mostly used in valves of liquid rocket engine.Generally,there is a V-shaped groove transition at the junction of metal and fluoroplastic.During processing the metal-fluoroplastic composite V-shaped groove,iron filings splashing out are likely to damage the fluoroplastic surface or cause poor surface roughness.In order to solve this problem,the tool parameters were designed by analyzing the structural characteristics of metal-fluoroplastic composite seal,summarizing the shortcomings of the traditional machining process and optimizing the cutting route.Using the finite element simulation technology,the 3D simulation software DEFORM was used to simulate the cutting process,and the average cutting force of the cutting process was calculated.In addition,the simulation results were optimized with the orthogonal test method.Finally,the processing method of metal-fluoroplastic composite V-groove was improved from three aspects of process method,tool parameters and cutting parameters.The proposed improvement scheme solves the problem of iron filings splashing during the metal-fluoroplastic composite V-groove processing process,and improves the production qualification rate of the metal-fluoroplastic composite valve spool.This improvement scheme has been applied to the production process of various composite valve spools.
作者
郭叶
赵飞
GUO Ye;ZHAO Fei(Xi'an Space Engine Company Limited,Xi'an 710100,China)
出处
《火箭推进》
CAS
2020年第6期103-108,共6页
Journal of Rocket Propulsion
基金
航天先进制造技术研究联合基金(U153710077)。
关键词
复合结构
机械加工
切削参数
有限元模拟
正交试验
工艺改进
composite structure
mechanical processing
cutting parameter
finite element simulation
orthogonal test
process improvement
