Electric heating – Metal heating – By arc
Patent
1995-08-11
1999-03-09
Evans, Geoffrey S.
Electric heating
Metal heating
By arc
B23K 2600
Patent
active
058804307
ABSTRACT:
A method for computer laser etching a design into a workpiece where the design is laser etched into the workpiece with the aid of a computer and computer peripherals, a laser etching device, and a control program which controls the laser beam. The workpiece may include a surface upon which a single layer or multiple layers of oxidizable coating material, such as paint, has been applied. The method is performed by the following steps: the design is input into the computer memory by use of a scanner or other input device; the design may then be scaled to a desired size; the intensity of the laser beam is selected so that only a single layer of material is removed; and the control program directs the laser beam to etch away appropriate portions of the layer of ablatable material, thus exposing the underlying surface and forming the desired design. Multiple color or multiple layer designs may be formed in a like manner where the laser beam is controlled by the control program to remove different portions of each layer to create a multi-colored or multi-layered design. The workpiece may consist of a molding form where the laser etches a three dimensional pattern into it to create a cavity which is subsequently filled with molten material for casting an object, by the steps of: inputting a design into the computer memory; scaling the design to the appropriate size; selecting the proper intensity for the laser beam so that the design is etched into the workpiece at the proper depth; controlling the motion of the laser beam with the control program so that the design is etched into the surface.
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