A deformation compensation method for wax pattern die of turbine blade

The turbine blade is one of the most important parts in turbine machinery. Casting deformation is an important index to evaluate the quality of the turbine blade. In order to control the deformation of the turbine blade during investment casting, a novel compensation method based on reverse deformation was proposed in this study. Firstly, the process of deformation compensation was discussed. To overcome the disadvantage of the iteration compensation process, a one-step compensation model was developed based on Taylor expansion. Moreover, a smooth deformation function for the compensation model was regressed based on casting simulation results. Finally, two blades were optimized according to the proposed methodology. The deformations before and after compensation were compared. The results indicated that the casting deformation was reduced significantly. Hence, a more accurate blade can be achieved.