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钛桨叶壁厚分布不均匀,理论上容易产生热应力变形。本文针对大型钛浆叶铸造变形问题,提出一种确定变形量的方法,并在模型制作过程中设计反变形量,通过反复测量、验证来确定铸造工艺,成功铸造出大型钛浆叶。结果表明:利用反变形的校形模具对铸件在凝固过程中的变形进行校正可减少叶片型面的尺寸超差,实现叶片的型面控制。此方法简单易行,成本低。
Titanium blade wall thickness distribution is uneven, in theory, prone to thermal stress deformation. In this paper, aiming at the problem of large titanium blade casting deformation, a method to determine the deformation is proposed. In the model making process, the amount of anti-deformation is designed. By repeated measurement and verification, the casting process is determined and a large titanium slurry blade is successfully cast. The results show that the deformation of the casting during the solidification process can be corrected by the anti-deformation of the shape of the mold to reduce the size of the blade surface oversize, to achieve blade profile control. This method is simple and low cost.