GB1303358A - - Google Patents

Abstract

1303358 Making turbine blades; rolling COMPAGNIE ELECTRO - MECANIQUE 11 March 1970 [31 March 1969] 11639/70 Headings B3A and B3M A precision workpiece, such as turbine blades, is rolled between profiled rolls 2 and 3, Fig. 1, while being supported by a workpiece handling device 10, the workpiece being positioned and fed by the device in response to rotation of the rolls. Thus, the rolls are first rotated from the position shown in Fig. 2 until the tool surfaces 12 and 13 on the rolls engage a stationary workpiece 14; and the device 10 is then operated to retract the workpiece at a speed slightly in excess of the tangential speed of the tool surfaces. A control unit 11 controls rotation of the rolls through a clutch assembly 9, and controls movement of the device 10 electrohydraulically. The device 10, Fig. 6, incorporates a pair of workpiece gripping jaws 15 carried on an hydraulically movable arm 15a. The arm is mounted on a carriage 17 for axial movement, but can be tilted by a hand wheel 32 about horizontal axles 25a, 25b. The support 18 for the carriage 17 can additionally by pivoted about a vertical axis 26. The inclination of the arm 15a, and hence the workpiece, can therefore be adjusted over a wide range relative to the rolls. A pair of roll stands is conveniently provided side by side so that a workpiece can be rolled in two successive passes. For this purpose the handling device 10 is movable on transverse rolls 23, 24 so that it can be aligned with either roll stand. Stops 28 and 29 limit movement of the device on the rails, and further stops may be provided for limiting movement of the carriage 17 towards the stands. (For Figures see next page.)