Steel-bolts or bolts of other metal-alloys with heads built up through electric upsetting and means and proceedings for this upsetting

摘要

515,142. Making tie bolts. JASELLI, E. Feb. 22, 1938, No. 5613. Void. Convention date, Feb. 22, 1937. [Classes 83 (ii) and 83 (iv)] Forging-machines.-Tie bolts of the form shown in Figs. 2 and 3 and used for aeroplane construction are made by upsetting electrically heated rod in apparatus involving electrodes in the form of a vice and anvil. Either the vice or the anvil can be moved backwardly during the upsetting operation. Guides are employed for the bar during the operation and in Fig. 7 these are in the form of rolls l, l1 which supply the upsetting pressure to the rod a to force it against the anvil g, a vice electrode f being employed.