摘要
诱导轮的入口边减薄传统工艺为手工减薄,其工艺决定了产品尺寸的一致性,对涡轮泵的水试扬程和汽蚀余量有着重要影响,因此提出了一种数控减薄的工艺方法。选取水试性能较好的诱导轮实物作为基准,通过逆向工程进行三维模型的重构,进而利用重构模型进行数控编程、程序的后处理、工艺仿真,最后将加工出来的产品进行水力试验验证。结果表明:入口边通过数控减薄的诱导轮,其入口边尺寸一致性较好,水试扬程及汽蚀余量散差较小,产品的合格率也得到了提高。同时通过转换基准,保证了基准统一,实现了一次装夹即可完成叶片加工、去除余量工作,加工效率提高了41.5%,减轻了劳动强度。
The traditional technique for thinning the inlet edge of the inducer wheel is manual thinning.This process determines the consistency of the product size and has a significant influence on the water test head and the net positive suction head of the turbopump.Hence,a numerically controlled thinning process method was proposed.A physical inducer wheel with superior water test performance was selected as the benchmark,and the three-dimensional model was reconstructed through reverse engineering.Subsequently,the reconstructed model was utilized for numerical control programming,post-processing of the program,process simulation,and finally,the processed product was subjected to a hydraulic test for verification.The results indicated that the inlet edge of the inducer wheel thinned by numerical control exhibits better consistency in size,smaller dispersion in water test head and NPSH,and an increased product qualification rate.Simultaneously,by converting the benchmark,the uniformity of the benchmark was ensured,enabling the completion of blade processing and the removal of excess material with a single clamping.As a result,the processing efficiency was enhanced by 41.5%and the labor intensity was alleviated.
作者
蔡延波
李仕林
史福俊
张永强
廖阔
龙恒强
张锋
Cai Yanbo;Li shilin;Shi Fujun;Zhang Yongqiang;Liao Kuo;Long Hengqiang;Zhang Feng(Xi’an Aerospace Engine Co.,Ltd.,Xi’an 710100)
出处
《航天制造技术》
2024年第6期16-20,共5页
Aerospace Manufacturing Technology
关键词
诱导轮
逆向工程
数控加工
工艺仿真
inductor wheel
reverse engineering
NC machining
process simulation
