Metal working – Method of mechanical manufacture – Obtaining plural product pieces from unitary workpiece
Patent
1987-01-12
1988-04-05
Moon, Charlie T.
Metal working
Method of mechanical manufacture
Obtaining plural product pieces from unitary workpiece
29513, 29521, 138166, 220 76, 312261, B23P 1700, B23P 1100, B21D 3900
Patent
active
047349719
ABSTRACT:
A method of joining first and second flat sheet metal portions in overlapping relation one above the other to form a joint in the two sheet metal portions. Metal adjacent and spaced from one free edge of a first sheet metal portion is cut parallel to the free edge and expanded to form a generally U-shaped female receptacle arcuately domed and tapered inwardly and downwardly in a direction away from the free edge. The second sheet metal portion is cut in a truncated V-shape and the V-shape cut is bent to form a generally truncated, V-shaped male prong bent at an angle with respect to the second sheet metal portion. The first and second sheet metal portions are forced into overlapping engagement, one above the other, progressively, while directing the male prong into the female receptacle. The overlapped sheet metal portions then are crimped or pressed together to flatten the domed female receptacle and form complementary L-shaped bends in the two sheet metal portions, secured on both sides of foot portions of the L-shaped bends with metal from the other sheet metal portion.
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ARO Metal Stamping Co., Inc.
Moon Charlie T.
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