Photo Chemical Machining for Precise Parts
Photo Chemical Machining (PCM) is a metalworking process that produces precise parts in thin metal. Using a photographic process the image of the shape is developed on a resist laminated sheet metal. The unprotected surface of the metal is chemically etched away resulting in a close tolerance part.
The types of metals PCM works on:
- Stainless steel
- Spring steel
- Electrical steel
- Phosphor bronze
- Beryllium copper
- Copper alloys
- Nickel silver
- Nickel alloys
Low cost tooling: PCM is a very economical option for the R & D or prototype phase of a project, as well as long run productions. Here's how you can save money by using a photo tool in comparison to other processes requiring hard tooling:
- Take the metal specified in your drawing...
- laminate it with a light sensitive resist on both sides...
- place a photo-tool on the coated metal and expose it to ultraviolet light.
- The light hardens the resist and the the unhardened portion is developed away.
- The metal sheet is run through a conveyorized chamber where acid-etching removes the exposed metal...the remaining resist is stripped and the parts are ready for inspection.
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