GRINDING METHOD FOR GAS TURBINE BLADE BY MEANS OF TOOL WITH FLEXIBLE-BINDER IN MAGNETIC FIELD Russian patent published in 2005 - IPC

FIELD: machine engineering, possibly shaping of three-dimensional complex surfaces of parts such as working portion of blade of gas, steam or hydraulic turbine.

SUBSTANCE: method is realized at using abrasive particles as tool. Before grinding process, working portion having inlet and outlet edges, back, trough is described analytically on base of modular geometry model of complex-shape surface. Analytically described portion of blade is used for calculating common homo-helical motion path of abrasive particles. Working is performed in resonance type accelerating cyclotron. Charged abrasive particles controlled by magnetic field are imparted to motion along common homo-helical path relative to blade according to condition providing possibility for changing common homo-helical surface depending upon type of blade, changing type of helical path of abrasive particles and fraction size of abrasive particles. Such procedures allow combine in one manufacturing cycle main operations for grinding blade beginning from rough stage and ending by super-finishing stage.

EFFECT: enlarged assortment of types of ground blades, enhanced accuracy of macro-geometry of blade, possibility for controlling process of forming micro-relief of surface layer of blade.

3 dwg