Turbine vane air-foil surface grinder

A machine for resurfacing in one operation both the convex and concave air-foil surfaces of turbine vanes and the like, comprising in combination:

• a. a base part,
• b. a carriage part movable over the base part toward and away from a work-performing station thereon,
• c. an abrasive belt carried by the base part and a shaft and pully on said base part, around which the belt passes so as to present a convex cutting surface at said work-performing station, the radius of said pulley being less than the smallest radius of curvature of the concave air-foil surface of the vanes so as to admit the belt fully into the concave surface,
• d. powered means for driving the belt,
• e. means comprising a pair of axially aligned and axially spaced apart, independent shafts on the carriage part for rotatably mounting the opposite ends of the vane to be resurfaced and enabling the entire air-foil periphery thereof to be continuously presented for engagement with the cutting surface of the belt as the carriage part moves relative to the work-performing station,
• f. a cam carried by one of said parts and turnable about an axis thereon, said axis being parallel to and non-coaxial with said axially-aligned shafts and said cam being located opposite the space therebetween,
• g. a cam follower carried by the other of said parts and engaging said cam, said
• h. drive means connecting the cam and the vane mounting means to effect simultaneous synchronous rotation of the cam and the vane, whereby the resurfacing of the latter is governed by the particular contour of the cam,
• i. said drive means including means connected with the aligned shafts, for gearing the same together for simultaneous turning movement.