A PRELIMINARY STUDY ON AN IMPROVED GRINDING PROCESS INTEGRATED WITH INDUCTION HEATING TECHNOLOGY

摘要

Now, grinding is always the last machining process in the production of the nickel alloy aerospace parts but the tensile residual stress, which is harmful to ensure the fatigue property and stability, is prone to take place in the surface or subsurface due to the extreme temperature. Many efforts have been done to overcome the difficulty, which include cooling the grinding zone more effectively and adding the post-processes (rolling, shot peening, etc.). In the paper, an improved grinding process integrated with induction heating is described and validated by numerical method. A 'hot' layer below the grinding surface is added by an internal heating technology before and during the grinding process, which helps to change the traditional mechanism of residual stress generation in and after grinding. The simulation result shows the significant improvements on the superficial residual stress distribution and gives the feasibility of the proposed grinding process.