Abstract

A seaming device is provided with: a processing unit (120) which includes a processing roller (127) for performing bending processing on a flange part (214) and a flange part (215), and a processing guide part (140); the processing guide part (140) which extends along the flange part (214) and the flange part (215) and guides a guide roller (129) so that the processing roller (127) processes the flange part (214) and the flange part (215); a retreat guide part (141) which is provided at a position apart from the processing guide part (140) and guides the guide roller (129) so that the processing roller (127) retreats from the flange part (214) and the flange part (215); and a switching unit which performs switching between a state in which a guide member is guided from the retreat guide part to the processing guide part and a state in which the guide member is guided from the processing guide part to the retreat guide part.

IPC Classes  ?

• B21D 51/30 - Folding the circumferential seam
• B21D 39/02 - Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by platingTube expanders of sheet metal by folding, e.g. connecting edges of a sheet to form a cylinder

Abstract

Disclosed is a seaming device which joins a first workpiece (110) and a second workpiece (112) by bending the first flange portion (114) of the first workpiece (110) and the second flange portion (115) of the second workpiece (112). Specifically disclosed is a seaming device provided with a direction restriction mechanism (136) which restricts the moving direction of a working roller (131) so that the working roller (131) moves in only a first direction and wherein the regulation of the moving direction of the working roller (131) can selectively be removed.

IPC Classes  ?

• B21D 39/02 - Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by platingTube expanders of sheet metal by folding, e.g. connecting edges of a sheet to form a cylinder
• B21D 51/30 - Folding the circumferential seam

Abstract

A press machining device comprises a lower die (31) including a die and a blank holder (33) which is arranged around the die and which can be moved away from a stationary plate and close to the stationary plate; an upper die (30) which cooperates with the lower die (31) to hold a workpiece (W) coated with a lubricant oil between the upper die and the lower die in order to machine the workpiece (W); and a die cushion device which supports the blank holder (33). The die cushion device includes an hydraulic cylinder (71) which biases the blank holder (33) toward the upper die (30) and which moves the blank holder (33) to approach the stationary plate while maintaining a state in which the blank holder (33) cooperates with the upper die (30) to hold the workpiece (W) therebetween when a pressing force above a predetermined value is applied to the blank holder (33) from the upper die (30), and a restriction device (75) which restricts the displacement of the blank holder (33) away from the stationary plate.

IPC Classes  ?

• B21D 24/02 - Die-cushions
• B21D 22/20 - Deep-drawing
• B21D 24/00 - Special deep-drawing arrangements in, or in connection with, presses
• F16B 7/14 - Telescoping systems locking in intermediate positions
• F16D 41/08 - Freewheels or freewheel clutches with intermediate wedging coupling members between an inner and an outer surface with provision for altering the freewheeling action