CNC Laser Cutting
Stainless steel filter made by CNC laser cutting
Robot part made by CNC laser cutting
Optical timing wheel made by CNC laser cutting
Mechanical latch made by CNC laser cutting
CNC laser cutting produces part shapes by cutting sheet material using an intense laser beam. In CNC laser cutting a beam of high-density light energy is focused through a tiny hole in a nozzle. When this beam strikes the surface of the work piece, the material of the work piece is vaporized.
CNC laser cutting offers low cost for prototype and short runs since no physical tooling is needed. Heat distortion is minimal and typically limited to about 10% of material thickness. Laser cut parts generally remain flat. The process yields minimal burrs.
Laser cutting can produce almost any 2D shape including shaped cutouts. Examples of laser cut parts include enclosures, cams, brackets, sculptures, holders, mechanisms, etc.
CNC laser cutting can be applied to several types of materials. Aluminum can be cut but requires a higher power more expensive laser. Stainless steel, plain steel and spring steel are highly suitable for laser cutting. Acrylic laser cuts superbly with a near polished edge.
Metals such as copper alloys are difficult to cut by laser due to their ability to reflect the laser light and absorb heat. Many plastics are problematic due to toxic fumes.
CNC Laser Cutting Design Considerations
- Minimize holes and cutouts.
- Rounded corners are slightly preferable.
- Edges may not be as smooth as milling or punching.
- Edge quality is usually better for thinner materials.
- Some spots along the edge, such as where the cut ends may be less smooth.
- Sharp inside corners of the part may have a slight rounding due to beam radius of approximately 0.02 - 0.04".
- Edge burrs are usually minimal and deburring of edges is usually not necessary but should be considered for a smoother edge.
- Thin flimsy structures, such as shapes where a high percent of material is removed and long slots may experience some warping.
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