Sharp edge formation on copper heatsinks

Details Sharp edge formation on copper heatsinks Sharp edge formation on copper heatsinks

1985-05-17

1987-09-15

Bilinsky, Z. R.

Gear cutting, milling, or planing

Planing

Process

409300, 409303, 295661, B23D 126

Patent

active

046936491

ABSTRACT:
An apparatus and method for imparting a sharp, defect-free outside corner of a desired angle to a metal workpiece are disclosed. The apparatus comprises two separate cutting tools, each with a distinct cutting direction. The tools are juxtaposed such that their leading surfaces are adjacent to each other and that their respective cutting edges intersect at the desired angle. This provides that the cutting directions of each tool are opposite one another. In using the improved cutting apparatus, the workpiece is secured and the apparatus must be movable along the x, y and z axes. By cutting the first and second surfaces of the workpiece in sequence with the first and second cutting edges of the present apparatus respectively, a sharp defect-free corner of the desired angle can be imparted to the workpiece. A specific application for the present invention is in the fabrication of intricate copper products, such as heatsinks for semiconductor devices.

REFERENCES:
patent: 218249 (1879-08-01), Fields
patent: 641469 (1900-01-01), Royle
patent: 1281965 (1918-10-01), Hutchinson
patent: 2936679 (1960-05-01), Thuerwachter

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