GB654121A - Improvements in and relating to the manufacture of crankshafts - Google Patents

Abstract

654,121. Making crank-shafts. RICHARDSONS, WESTGARTH & CO., Ltd., HUNTER, H., and DORRATT, J. A. June 10, 1948, No. 15678. [Class 83 (ii)] [Also in Group XXIV] Crank-shafts are made by securing together separate journals 1, crank-pins 5 and web sections 3, 4 solely by welding. The journals 1 with spigoted ends 2 are first butt welded in corresponding openings in the outer flanged web sections 3, and crank-pins 5 with spigots 6 are welded at each end in corresponding openings in the inner complementary flanged web sections 4. The flanges are then machined square with the crank-pin 5 and journals 1 and the web sections are welded together at the flanges and at holes into which the spigots 2, 6 protrude. In a modification the webs 3, 4, Fig. 4, may have flanges extending only partly round the edges leaving a space for a counterbalance weight 7 to be bolted or welded thereto and for a closing plate 13 welded at 14 which may in part replace the flanges. In a further modification, Fig. 7, the crank-pins and journals may each be welded to one only of the web sections which may have stiffening ribs 11. The journals and pins may be solid forgings or heavy walled tubes and the webs may be pressings, forgings or castings.