| 摘要 |
1293673 Welding by pressure; chucks CATERPILLAR TRACTOR CO 1 May 1970 [1 May 1969] 21118/70 Headings B3B and B3R In a friction welding machine, at least one of two workpiece chucks has radially acting gripping means provided with surfaces 37 conforming to the workpiece surface, and to avoid marking the workpiece said surfaces 37 are faced with a resiliently deformable, e.g. elastomeric, material 42 of 0À002-0À062 inch thickness. As shown, a clutch 14 comprises an axially drawn split collet sleeve 34 co-operating with a tapered bore 33 of a chuck housing 31. The material 42 is secured to part-cylindrical surfaces 37 of the collet sleeve and may be of an elastomer such as polyurethane which may be applied as a liquid sprayed or painted on and oven dried or cured. Alternatively the material 42 may be of sheet stock. In Figs. 4, 5 (not shown), the surfaces 37 are formed on separate, tapered jaws (51, 52). The friction welding machine described comprises a rotationally fast chuck 16 axially movable, for friction loading, by a pressureactuated cylinder 24, and a chuck 14 rotated by a motor 19 via an hydraulic pump and motor variable-ratio transmission 21, 22. For inertia operation, a flywheel 26 may be associated with the chuck 14. |
