Abstract: A turbine blade positioning fixture for accurately positioning a turbine blade relative to its stacking axis during a grinding of the blade root form is characterized by a unique positioning assembly which enables the operator to quickly insert and remove turbine blades relative to the fixture for accurate uniform positioning of successive blades. The fixture includes a rigid base for supporting spaced sections of the air foil portion of a turbine blade, and a locator pin is connected with the base for abutment against the datum point of the blade. A spring-biased upper block is resiliently connected with the base to exert a positioning force on the surface of the air foil portion of the turbine blade to urge the blade against the support of the fixture base and against the locator pin. More particularly, the upper block and the base define a cavity therebetween for receiving the air foil portion of a turbine whose root form is to be ground.

Abstract: A turbine blade holding device is disclosed for accurately holding a turbine blade relative to its stacking axis during grinding of the root form portion thereof. The device includes a fixed base and front and rear datum plates for supporting spaced sections of the air foil portion of the blade. A longitudinally extending pin is connected with the base and is designed to abut against the datum point of the blade. A clamping mechanism clamps the blade against the pin and the datum plates, with the front datum plate supporting the leading and trailing edges of the blade and the rear datum plate supporting the leading edge of the blade. The clamping mechanism includes an elongated clamp pivotally connected with the base and arranged along the fulcrum of the blade.