Abstract: A method for fixing a piercing nut includes placing on a punching die a metal plate. A pilot portion is provided at a bearing surface of a nut main body of the piercing nut. A height from the bearing surface to an end face of the pilot portion is smaller than a thickness of the metal plate. The pilot portion is pressed to a first surface of the metal plate to be struck into the metal plate so that an inner peripheral surface of a punching opening portion of the metal plate engages with an outer peripheral surface of the pilot portion to fix the piercing nut to the metal plate. The end face is positioned between the first surface and a second surface of the metal plate. A punching slag is downwardly pushed to discharge the punching slag to a punching hole of the punching die.

Abstract: An apparatus to produce a self-piercing and clinch nut includes a first forging die assembly, a second forging die assembly, a third forging die assembly, a transfer mechanism, and a controller. The first forging die assembly is configured to subject a blank to first processing. The second forging die assembly is adjacent to the first forging die assembly and configured to subject the blank to second processing after the blank has undergone the first processing in the first forging die assembly. The third forging die assembly is adjacent to the second forging die assembly and configured to subject the blank to third processing after the blank has undergone the second processing in the second forging die assembly. The controller is configured to control the first forging die assembly, the second forging die assembly, the third forging die assembly, and the transfer mechanism to operate.

Abstract: A supply chute 11 has a nut send-in port 14 at its upper end, and is composed of an inclined chute 12 inclined obliquely downward, and a curved chute 13 coupled to the lower end of the inclined chute 12 and curved like an arc obliquely downward. A nut support mechanism 40 is disposed at a nut send-out port 15 provided at a terminal end of the curved chute 13, for supporting the nuts 60 being forwarded so that their bonding side 62 may be in an oblique downward position nearly orthogonal to the axial line of a guide rod 20. The inclined chute 12, the curved chute 13, the guide rod 20, and driving means 25 for moving the guide rod 20 back and forth in an oblique downward direction are mounted on a stand 22 installed rotatably on a support member 33 by way of a horizontal support shaft 35, and the support member 33 is coupled and fixed to a main body arm 2 of the bonding machine 1.

Abstract: A method for fixing a piercing nut includes placing on a punching die a metal plate. A pilot portion is provided at a bearing surface of a nut main body of the piercing nut. A height from the bearing surface to an end face of the pilot portion is smaller than a thickness of the metal plate. The pilot portion is pressed to a first surface of the metal plate to be struck into the metal plate so that an inner peripheral surface of a punching opening portion of the metal plate engages with an outer peripheral surface of the pilot portion to fix the piercing nut to the metal plate. The end face is positioned between the first surface and a second surface of the metal plate. A punching slag is downwardly pushed to discharge the punching slag to a punching hole of the punching die.

Abstract: A press for attaching nuts to pipes has an upper base, a lower base, a movable support having a base end supported at a rear end of the lower base and a front end extending to the front end side of the lower base, a nut receiving recess provided in a piston of a hydraulic cylinder at the front end of the movable support and disposed at the upper end of a lower pattern, a lifter for the movable support, a stopper for the middle position of the movable support, a crimping die as an upper pattern mounted on the upper pattern support and movably disposed vertically on a same axial line as the lower pattern, and a hydraulic cylinder for pressing an upper pattern disposed on the upper base, and pressing the crimping die downward.

Abstract: A press for attaching nuts to pipes has a lower holder (6) fitting in and holding a pipe (60). A basal portion of this holder supported on the rear part of a lower base (2) moves up and down, and its forward portion extends to the front part of a lower base. Lifters (30) bear against and support the forward portion so as to keep it lifted a slight distance. Stoppers (31) bear against and support an intermediate region of the holder to be lifted a slight distance, and also bear against an end of the pipe (60) and retaining it at a prescribed position. A nut feed passage (10) extends in an outer surface of the lower holder from its basal to forward portion, and a nut pusher (14) is disposed in the forward portion. A cam rod (21) inserted in the lower holder (6) has a frontal oblique cam surface (22) for driving the pusher (14) to a nut releasing position (12), and a cam actuating means (25) is for the rod.