Forming apparatus
AssigneeGeneral Electric Company
InventorsFrederick M. Baldwin, Stanley J. Noesen
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Abstract
Apparatus for forming hollow metal articles such as aluminum reflectors for Luminaires. The apparatus comprises a convex forming punch movable into a complementary hollow magnetic forming coil device. The forming punch is mounted on a base having an annular slot opening at the periphery of the forming punch and being connected to passages in the base for quickly evacuating the air between the workpiece and the punch prior to the magnetic forming operation.
Claims4
Forming apparatus comprising, in combination, forming means comprising a convex forming punch having a base on the bottom thereof, annular wall means extending around said base and offset laterally beyond the bottom of said forming punch, said forming punch having an outer forming surface adapted to receive and form a hollow workpiece having a rim adapted to rest on the top of said annular wall means, said annular wall means formed with an annular slot opening at the top thereof closely adjacent said forming surface of said forming punch, said base formed with radial passages communicating with said annular slot, and evacuating means connected to said radial passages for evacuating the air in the space between the workpiece and said forming surface of said forming punch, said annular wall means comprising an annular member axially slideable relative to said base.
Dependencies are inferred from the claim text.