Sheet metal fan blade forming process

Details Sheet metal fan blade forming process Sheet metal fan blade forming process

1977-05-24

1978-10-17

Gilden, Leon

Fluid reaction surfaces (i.e., impellers)

Specific blade structure

Irregular, flanged or channel forming blade surface

291568B, 416236R, 416DIG3, B63B 1900

Patent

active

041202570

ABSTRACT:
A method of making a sheet metal fan blade having a flattened mounting pad. The blade is to be attached to a flat spider arm of a fan hub. According to the method, a fan blade blank workpiece of cylindrical stock and of any desired outline (such as rectangular, trapezoidal, etc.) is simultaneously provided with a longitudinally running rib and a flat pad portion by stamping. In this manner, the outline of the blade is not distorted by stamping the cylindrical blank to form the flat mounting pad.

REFERENCES:
patent: 2240597 (1941-05-01), Whitfield

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