Metal working – Means to assemble or disassemble – Means to drive self-piercing work part
Patent
1999-06-18
2000-12-19
Bryant, David P.
Metal working
Means to assemble or disassemble
Means to drive self-piercing work part
294322, 8369891, B23P 1100
Patent
active
061612790
ABSTRACT:
A pierce nut mounting die for supporting and backing a metal sheet when a pierce nut is forcibly punched through the sheet for interlocking with the sheet, comprises a tubular body having a support end for engaging the sheet and for deforming a portion of the sheet into an interlock with the nut. The support end of the die body is provided with a transverse notch, which is generally trapezoidal in shape. A plug, shaped correspondingly to the notch is removably positioned within the notch. The exposed end of the plug, that is, the end which is exposed through the notch opening, defines the smaller base of the trapezoidal shape and is provided with a raised bead. The bead surrounds an opening provided in the plug, which opening is coaxially aligned with an opening in the base for the passage of a punched out slug of sheet material resulting from the pierce nut punching through the sheet material. The bead engages and deforms a portion of the sheet material defining the edge of the punched out opening for clinching the sheet material and pierce nut together. The plug is manually removable and replaceable with a similar plug, whenever the bead becomes damaged or worn due to usage in mounting pierce nuts on thin metal sheets, without necessarily disturbing the position of the die body.
REFERENCES:
patent: 1279362 (1918-09-01), Krueger
patent: 2364401 (1944-12-01), Stellin
patent: 3282143 (1966-11-01), Wierscheim
patent: 3811171 (1974-05-01), Grube
patent: 5146672 (1992-09-01), Muller
patent: 5239740 (1993-08-01), Ladouceur
patent: 5502888 (1996-04-01), Takahashi et al.
Bryant David P.
Cozart Jermie E.
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