大直径薄壁焊接零件的车削加工技术

Turning Technology of Large-diameter Thin-wall Welded Parts

大直径薄壁零件具有重量轻、成本低、节约材料和结构紧凑等特点,广泛应用于航空航天领域各种型号产品中,但是焊接后的薄壁零件刚性差、强度弱,在加工过程中极易变形,难以保证尺寸精度。本文基于零件结构,分析产品变形影响因素,研究控制变形方法,设计辅助装夹定位工装,合理选用刀具及车削参数,提出一种针对大直径锥形薄壁焊接件的车削工艺方法,可以大幅提高产品的加工效率,保证加工精度。

Large-diameter thin-walled parts have been widely used in various types of aviation and aerospace products because of their characteristics of light weight,low cost,material saving and the compact structure.However,after welding,the thin-walled parts become poor in rigidity and weak in strength.Due to deformation during processing,it is difficult to ensure the dimensional accuracy.Based on the structure of the part,the influencing factors of the product deformation are analyzed,the method of controlling the deformation is studied,the auxiliary clamping and positioning tool is designed,and the cutting tools and turning parameters are selected reasonably.The turning technology for the large-diameter conical thin-wall welded parts can greatly improve the machining efficiency and ensure the machining accuracy.