DEVICE TO CONNECT TWO PARTS Russian patent published in 1994 - IPC

FIELD: two parts joining in metalworking, in particular, for securing two sheets of metal lining of pipeline thermal insulation. SUBSTANCE: device is made in the form of a gun, with a puncher positioned in the barrel of which. The puncher is made in the form of a metallic bar with pointed front edge and one-side bevel. The bar is provided with a return spring, and there is a piston on the side of breech mated with barrel bore. Rest-limiter with external bevel placed just opposite to the direction of punch bevel, and with a hole coaxial to barrel bore is fixed firmly at the end of barrel. A hole to exhaust spent compressed air after finishing piston operating stroke is made in the bore on the side of rest-limiter. Three operations providing one-piece butt joint for thin parts, namely opening formation, fastening lug formation from the part's material, working lug bending to working position are performed at the same moment. EFFECT: increased productivity and security. 7 dwg