Lasers have been applied extensively in industry. They are usually used for cutting, welding, drilling, surface modification, etc. The purposes of this laboratory are
- To allow the students to have some ideas of laser technology in manufacturing processes.
- To provide facilities for students’ final projects and MSc and PhD students’ theses.
- To serve local industries.
1. Corrosion testers
The laser system consists of the fiber-couple diode laser module (Laserline LDM 1000-1000) and the CNC XYZ table. Diode laser with near infra wavelength provides high energy absorptivity to metals.
||900 – 990 nm
||110 mm rad
Steps for laser processing:
- Design scanning sequences with the aid of drawing software, such as AutoCAD and Corel Draw.
- The drawing is converted to a CNC program that can be recognized by the controller of the CNC machine.
- Adjust the desired power level and scanning speed of the laser machine.
The laser beam is transmitted through an optical fiber. The high energy beam acts as a heat source and is controlled by the CNC machine for processing.
Applications of laser:
Cladding and alloying
Diode lasers are increasingly used in cladding and coating applications as well as in repair welding for improving corrosion and wear resistances. With a wide range of applications, they have proven themselves to be an extremely innovative technology.
Advantages: tailor-made surface properties, applicable for small area
Diode lasers reliably meet all hardening requirements for improved wear protection of machine components, tools, accessories and other implements.
Materials: steel with carbon content > 0.25%
Advantages: localized, high speed, automated, minimum heat distortion, controllable treatment depth
Cutting / Drilling
Diode lasers have excellent beam quality which makes them particularly efficient for melt and blow as well as for oxygen cutting. The compactness of diode lasers provide a whole new degree of mobility in this application.
Advantages: precise, high speed, automated, low heat input, minimum heat distortion, dross free for most materials, good edge quality.
Welding of metals
Diode lasers are used in a wide range of metal welding applications in industrial high volume manufacturing. For example: spot welding in the automotive industry.
Advantages: precise, high speed, automated, excellent weld quality, low heat input, minimum heat distortion, high weld aspect ratio, no filler metal needed.
- Laser transformation hardening
- Laser surface alloying
- Laser welding
- Laser cutting
||Advanced Materials for Engineers
||Corrosion, Wear and Degradation of Materials
||Physics of Materials
||Special Topics in Manufacturing I: Laser Materials Processing
||Special Topics in Manufacturing II : Surface Engineering