Abstract: A device for finishing shaped surfaces with an abrasive tool comprises a fixed base connected to a copying mechanism having a reciprocating carriage moving on the fixed base and carrying a double-arm lever pivotally mounted on a spherical bearing. Secured on one arm of the lever is an abrasive tool performing periodic swivelling motion about its own axis from a turning mechanism. The abrasive tool is urged to the surface being mechined by means of a hold-down member operatively connected with the second arm of the lever, the axis of the hold-down member passes through the center of the spherical bearing of the lever. The device of the present invention ensures an effect of urging of the tool in any point of the surface of intricate shape being machined.

Abstract: The arrangement for abrasive machining comprises a base member, connected with the headstock of a copy milling machine, and a casing, made in the form of a hollow cylinder, connected with the base member by articulated suspensions. Mounted in the seat of the hollow cylinder, by means of an intermediate sleeve, is a tool spindle which carries the abrasive tool. The intermediate sleeve has a spherical bearing with a flat end. The tool spindle is coupled to the rotary drive means by a flexible shaft and an intermediate shaft joined together by a splined joint. The arrangement also comprises a device for urging the abrasive tool against the surface to be machined, which includes an urging force adjustment means formed by a socket disposed in the hollow cylinder, spring-biased towards the flat end of the spherical bearing by its end and provided with a central hole for receiving the flexible shaft.