Laser Welding Of Aluminium Sheets

Laser processing of copper and aluminium thin sheets with green 532nm and infrared 1064nm pulsed laser beam sources.

Laser welding of aluminium sheets.

A 5 kw co 2 laser and 2 kw and 4 5kw nd yag lasers as yet only limited testing has been carried out on welds made with a 4 5kw experimental nd yag laser facility located at lumonics in rugby uk. Yttrium aluminum garnet fiber generally ytterbium doped disk yb yag ytterbium. Advances in laser keyhole welding and investigations into its accompanying difficulties are well documented in the literature. Introduction to laser welding of aluminum alloys aluminum al or aluminium for many of our friends around the world and its alloys are the most widely used non ferrous metals today.

Laser welding the joints were produced in a lap configuration with an overlap of 46 mm with steel positioned on the top of aluminium fig. Welding was carried out using two types of laser. Laser welding in conduction mode was used because of the characteristic weld shape with low depth to width ratio. Cu c101 and al 3003 sheets and foils the thickness range was from 0 1 to 1mm.

There are four main categories of lasers that are suitable for welding aluminum. Laser conduction welding lcw 10 6 w cm 2 is comparatively stable and may offer an alternative means of welding traditionally difficult materials such as aluminum alloys. The effect on melt depth. 5 kw continuous wave co2 laser in near.

While laser welding of pure al presents similar issues to those associated to pure cu certain al alloys can. There is an interest for aluminium alloy sheet assemblies for both butt joints and overlap joints with 2 or 3 sheets. You will find aluminum and its alloys in industries as varied as aerospace and sporting goods and electronics and consumer packaging. Tem00 mode with a spot size of 0 2 mm was used to weld the sheets figure 4 3b.

Typical welding parameters for a 5kw co 2laser and a 4kw cw nd yag laser for linear joints are given in table 3.