Chemical milling is a subtractive manufacturing process that involves using a strong chemical etchant to remove material from a workpiece. The process starts by applying a maskant, typically a photoresist or a special tape, onto the surface of the material to protect the areas that need to remain untouched. The workpiece is then submerged in a chemical bath that selectively etches away the exposed areas, leaving behind the desired shape.
One of the main advantages of chem milling is its ability to produce parts with intricate geometries and complex shapes that would be difficult or impossible to achieve with traditional machining methods. This process is particularly well-suited for thin and delicate parts such as aerospace components, electronic enclosures, and heat exchangers. Chem milling can also be used to create lightweight structures by selectively removing material from specific areas, resulting in parts with reduced weight and improved strength-to-weight ratio.
Advantages of chem milled Parts