초록 ▼

The materials to be chem-milled are coated with a maskant material, a template having a specific hole pattern is then placed over the masked surface of the material. A laser beam is then directed towards the template and is scanned either manually or by numerical control means along the hole pattern

The materials to be chem-milled are coated with a maskant material, a template having a specific hole pattern is then placed over the masked surface of the material. A laser beam is then directed towards the template and is scanned either manually or by numerical control means along the hole pattern. The laser is maintained at each hole for a sufficient length of time to enable the maskant to be burned from the material. The material is then chem-milled by any conventional means thereby forming holes through the material at the maskant free areas. The remaining maskant is then removed from the surface of the material.

대표청구항 ▼

A method for producing sheet material from imperforated sheet material comprising the steps of: coating all the exposed surfaces of said imperforate sheet material with a chem-mill resistant maskant; securing a removable first template having openings therethrough to said imperforate sheet material

A method for producing sheet material from imperforated sheet material comprising the steps of: coating all the exposed surfaces of said imperforate sheet material with a chem-mill resistant maskant; securing a removable first template having openings therethrough to said imperforate sheet material for communicating with one coated surface thereof; directing a laser beam through said openings in said first template for a sufficient time to remove said maskant from said imperforate sheet material within said openings; removing said first template; chem-milling the maskant free surface of said imperforate sheet material; and removing the remaining maskant from the now perforated material after said chem-milling.