Laser Cutting

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Lecture notes only for internal use in LPU Phagwara

LASER CUTTING
Advantages of laser cutting 1. Eliminate process variability due to tool wear 2. Multilayer and kiss cutting 3. Cutting of difficult and abrasive materials 4. Noncontact cutting eliminates part distortion 5. Direct integration with automated and semi-automated material handling 6. Reduced Material Usage: common cut lines and reduced part margins 7. Large cut area and fine detail from one tool Advantages of laser cutting acrylic Laser cutting of acrylic, other plastics and wood has several advantages over other methods of cutting such as CNC routing. Firstly, acrylic can be laser cut more accurately with a laser than a CNC cutter. A mechanical cutter can only cut detail as fine as the diameter of the smallest available tool. A laser cutter by contrast can cut to the width of the laser beam, measured in hundredths of a millimeter. This makes laser cutting of acrylic for cutting acrylic letters and logos. Mechanical cutting leaves a rougher edge finish to the cut surface than laser cutting, which need additional operations to achieve the standard of finish achieved with a laser. Laser cutting acrylic leaves a polished, finished edge requiring no further work. In some instances it is not possible to access the cut edge fully enough to polish and so the acrylic has to be laser cut. Laser cutting acrylic requires minimal jigging and fixturing making it an ideal process for cutting pieces that are difficult to hold using mechanical cutting methods. Lasers are quick to set-up and so smaller production runs and one-off pieces are more practical to produce using laser cutting. Cutting lasers have no mechanical tools that wear during production. As such the finished product is highly accurate, with extremely high repeatability of detail. As the width of a laser beam is much narrower than a typical CNC cutting tool, corners (such as right angles or tight triangles) can be cut without leaving a tool radius associated with mechanical cutting. Laser cut lettering and laser cut logos Laser cutting is ideal for acrylic logos and lettering. Laser cutting enables logos to be cut with incredible detail that cannot easily be achieved with mechanical cutting methods. Complex curves, tight, sharp angles and ornate fonts can all be easily produced using laser cutting methods. Laser cut logos and lettering can be used in: 1. Point-of-sale displays 2. Point-of-purchase displays 3.Retail display stands 4.Signs 5. Pub and restaurant displays

Lecture notes only for internal use in LPU Phagwara

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