Fibre Laser Cutting Essay

2011 Words Oct 2nd, 2013 9 Pages
Fibre Laser Cutting

Introduction
In the Fibre Laser Cutting experiment we were faced with a High Power Laser and required to design a series of experiments to determine how certain parameters affect laser cutting

Aim
To gain a basic understanding of the operation of High Power Class 4 Industrial Lasers in regards to the cutting of sheet metal, and how varying parameters affects the cuts finish.

Objectives 1. Learn basic components of a high power (Class 4) laser system and the basic safety issues involved

2. Learn principles and characteristics of laser cutting

3. Design and perform an experiment to investigate how three process parameters; Laser power, Type of gas and gas flow rate affect cut quality by the
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Reactive fusion cutting uses a laser to cause a reaction between the gas and the material to aid in the cutting; they tend to be used for large scale, high power situations where high precision is not necessary. When working with high powered lasers there are many dangerous elements to the process thus strict safety regulations are required in order to operate the equipment safely. The main consideration is involving eye damage since relatively small amounts of laser light can lead to permanent eye injuries. Moderate and high-power lasers are hazardous as they can burn the retina of the eye or the skin, to control the risk of injury lasers are defined under classes depending on the power and wavelength. Class 4 lasers are the highest classified category and have outputs of more than 500mW, the beam used in our experiment was 1000W, most industrial, scientific or military lasers are in this category. For our experiment all laser cutting took place behind a large partition to prevent any visual contact with the laser beam.

Apparatus

For our experiment the laser cutting system comprised of:

1. An IPG YLR-1000-SM 1kW single-mode fibre laser (1070nm wavelength) with optical fibre delivery (14 micron

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