GB992678A - Improvements in or relating to swaging machines - Google Patents

Abstract

992,678. Swaging machines. FERTIGUNGSTECHNIK UND MASCHINENBAU G.m.b.H. GES. FUR. Nov. 12, 1962 [Dec. 21, 1961], No. 42581/62. Heading B3H. [Also in Division G3] A swaging machine has a plurality of radially acting hammers 2 driven by eccentrics 7 in rotatably adjustable housings 11, each of which is connected to a backing piston 23 in an hydraulic cylinder 22 which resists rotation of the housing during the hammer blow unless an excess pressure is reached when a pressure relief valve 29 opens. The machine has four hammers, Fig. 2 (not shown), whose eccentric shafts 6, Fig. 1, are driven through " Oldham " couplings 18 and gearing 15, 16 by a common motor 13, Fig. 4. The eccentrics 7 operate in transversely slidable blocks 8 on the hammers which are guided radially in bearings 4, 5. For locking the housings 11 against rotation during the actual swaging stroke, the left-hand ends of cylinders 22 are supplied with pressure liquid from pump 24 through conduit 26 and rotary valves 27 driven through gearing 28 by one of the spur gears 16, whereby the valves are closed during the swaging stroke and lock the pistons 23 against movement. If excess pressure occurs the relief valve 29 opens. For adjusting the housings 11 and hence the stroke position of the hammers, the right-hand side of piston 23 is connected to the pump 24 through constant pressure valve 30, conduit 31 and slide valve 33. The latter is moved by a cam 34 to regulate the pressure in cylinder 22 by controlling the opening of an exhaust conduit 44. Movement of cam 34 is effected through lever 35 and worm gearing 40, 41 by a motor 42, Fig. 3 (not shown), and a follow-up linkage 38 is provided. The motors 42 of all the hammers or pairs of hammers may be synchronized or a mechanical coupling provided between the worm gearings.