Fronius welding machine for low warpage welding of thin sheets

Founded by Walter Knoll as a one-man business in 1970, the company today manufactures advanced industrial systems in Germany, Poland, China, and the US. Knoll occupies a leading position in terms of technology, quality, and brand awareness in sectors ranging from the automotive industry, to energy and medical technology, through to machine and plant construction and the aerospace sector.

What’s your welding challenge?

Knoll Maschinenbau GmbH

Sites:
7

Employees:
±1,100

Manufacture of:
Cleaning systems
Chip conveyors
Pumps
Central systems
Assembly conveyor belts
Automated guided vehicles (AGV)
Cobot solutions

Fronius products used:
TPS 320i

Process application:
MIG/MAG pulse welding process with synergic function

» “As a solution provider, we offer all the necessary services from a single source—from project planning and manufacturing, to commissioning and service. We do our machining in-house, so potential buyers can see the advantages our products have to offer for themselves in real-world operations.” «
Joachim Riebsamen, Shell construction production manager

The challenge

One of the biggest welding challenges at Knoll is processing thin sheets. The team needs to join components with material thicknesses from 1–6 mm with little heat input—while keeping warping to a minimum. Many of these components are visible parts, so the seams have to be perfect from a metallurgical perspective and look great at the same time. Given these requirements, the welding process has to be largely spatter-free with a low seam build-up.

The solution

The welding specialists at Knoll use the TPS 320i welding machine in combination with the pulse welding process. The intelligent MIG/MAG pulse synergic function offers a pulsed arc process with controlled material transfer. In the base current phase, the energy input is reduced to such an extent that the arc only just burns steadily and preheats the surface of the workpiece. In the pulsing current phase, an accurately controlled current pulse ensures targeted droplet detachment. Both phases result in precise, low-spatter welding across the entire power range.

Products used

TPS 320i

MIG/MAG welding machine
Integrated data documentation
Intuitive touch display

More about the product

TPS 320i

MIG/MAG welding machine
Integrated data documentation
Intuitive touch display

More about the product

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