Heat conduction welding

Gentle material processing - excellent seam qualities - no rework - high efficiency

The process

Heat conduction welding is characterized by low exposure depths of maximal one millimeter, and is mainly used for joining sheets with low material thickness. With heat conduction welding, the laser melts the sheets along the intended joint. The melts of the joint partners merge together and then cool off to the actual welding seam. Thus, hose connections can be realized more quickly and with lower material distortion than with usual welding methods. Additionally, smooth and pore-free welding seams are created that do not need any post-processing. This makes heat conduction welding, especially in visible areas, the method of choice.

Diode lasers’ process advantages

Laserline's diode lasers optimize heat conduction welding in a number of ways. The uniform power output and homogeneous intensity distribution (top-hat beam profile) guarantee excellent seam qualities and high process stability. Additionally, there are enormous economical advantages: with a lifetime of more than 30,000 operating hours, in addition to high efficiency and low maintenance effort, Laserline's diode lasers are clearly superior to other available beam sources. 

Application examples


They can be found in every household and factory canteen, and they always seem to be from a single cast. However, sinks out of stainless steel actually have welding seams. That you do not see them often enough has to do with Laserline's diode lasers: they make technically and economically optimal heat conduction welding possible, which leaves no visible marks.

Metal bellows

When thermal expansions of pipelines must be compensated or vibrations between vacuum pumps and measuring instruments must be decoupled, metal bellows are used. Welding thin and flexible membrane pairs requires an even heat input that creates stable, crack-free welding seams. Here, Laserline's diode lasers provide excellent results.