Application of procedures in order to connect objects or parts

BPERFORMING OPERATIONS TRANSPORTING B21Mechanical metalworking B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING METAL

B21D39/00Application of procedures in order to connect objects or parts

B21D39/02of sheet metal by folding B21D39/021for panels B21D39/023using rollers B21D39/025Hand tools B21D39/026Reinforcing the connection by locally deforming B21D39/028Reinforcing the connection otherwise than by deforming B21D39/03of sheet metal otherwise than by folding B21D39/031Joining superposed plates by locally deforming without slitting or piercing B21D39/032by fitting a projecting part integral with one plate in a hole of the other plate B21D39/034Joining superposed plates by piercing B21D39/035Joining superposed plates by slitting B21D39/037Interlocking butt joints B21D39/038Perpendicular plate connections B21D39/04of tubes with tubes of tubes with rods B21D39/042using explosives B21D39/044perpendicular B21D39/046Connecting tubes to tube-like fittings B21D39/048using presses for radially crimping tubular elements B21D39/06of tubes in openings B21D39/063for assembling ladders B21D39/066using explosives B21D39/08Tube expanders B21D39/10with rollers for expanding only B21D39/12with rollers for expanding and flanging B21D39/14with balls B21D39/16with torque limiting devices B21D39/18Rollers of special shape B21D39/20with mandrels B21D39/203expandable by fluid or elastic material B21D39/206by axially compressing the elastic material