Patent ID: 8161646
Filing Date: 2012-04-24
Classification: B21D,Y10T

Abstract:
1. A method of manufacturing heat radiating fin, comprising: providing a sheet material to serve as a raw material for manufacturing said heat radiating fin; conducting plastic working on the sheet material for the sheet material to generate plastic deformation, so that a plurality of recessed portions is formed on a front side of the sheet material, and a plurality of protruded portions is correspondingly formed on a rear side of the sheet material behind the recessed portions to complete a heat radiating fin; stacking a plurality of said heat radiating fins with the protruded portions on a second heat radiating fin partially extended into corresponding recessed portions on an adjacent first heat radiating fin located before or below the second heat radiating fin; and forming a plurality of dots around an outer surface of each of the protruded portions by way of plastic working, such that the dots on the protruded portions of the second heat radiating fin are in contact with inner rims of the recessed portions on the adjacent first heat radiating fin to prevent the protruded portions from being excessively extended into the recessed portions.