Light weld guns in spot welding

There is a certain trend in the automotive industry to switch to more sustainable production methods and saving raw materials and energy for costs optimization. In general it can be reflected in switching towards more compact solutions, one of which are light weld guns.

What is the difference from conventional weld guns?

High dynamics with high welding force is possible

As for most of the spot welding programs 8 kN force is sufficient to produce good quality spot welds, automotive manufacturers tend to equip their manufacturing facilities with light weld gun solutions. What can be not obvious from the beginning is the positive effect for the manufacturing – higher robot dynamics can be achieved! As the gun itself has comparable parameters of closing/opening speeds and force, it can be used for the same applications, but at a much higher pace: there is less stress on robot moving mechanisms, so higher accelerations and speeds can be allowed when carrying the lightweight guns. This can have a good effect on the welding cell productivity.

Why else do automotive manufacturers choose compact weld gun – based weld cells?
Possible to use smaller industrial robots

There are several economical advantages of equipping welding cells with smaller industrial robots. Besides the costs of the light weld gun itself, the robot also costs less, so the initial investments will be lower. Additionally, smaller robots consume less energy, what can have a positive effect on the ownership costs of the welding cell.

Less premises needed for production of the same volumes

What is even more interesting is that if properly organized at the design stage of the new facility, it is possible to save substantial amount of space. First of all, it is less construction costs less rent and all the initial investments. Secondly, it is less variable costs during the line lifetime, e.g. energy costs for heating of the plant would also be lower.

Diakont offers DA78 compact actuator for light weld guns: