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CMT Advanced welding technology from Fronius benefits from extra features that improve on standard CMT technology. According to the company, CMT Advanced allows users to join very thin sheets, bridge large, uneven gaps and produce high-quality, almost spatter-free seams, even in adverse conditions.

According to the company, the technology permits significantly higher wire-feed speeds and therefore higher deposition rates with the same levels of energy input. Users benefit from larger and more precise adjustment windows and the improved guidance and control of the weld pool.

Three examples illustrate further benefits. First, the gap-bridging properties (Photo 1). When welding AlMg3 base material using AlSi5 filler metal with a wire diameter of 1.2mm, the speed is 60cm/min. Without any oscillating motion, the CMT Advanced Pulse process bridges a 2mm gap between two 2mm sheets to produce a clean seam.

The second example (Photo 2) shows a lap joint between two 2mm sheets with the same stable parameters as in the first example, but with a gap that varies in size from 0–2.5mm. Despite the gap differences, the welding process operates without having to change the parameters and without any process instability along the entire length of the seam.

In the third example (Photo 3), the sheet thickness is 0.8mm with otherwise identical parameters. The gap is 1.3mm along the entire length of the join.

Key features and benefits

  • CMT Advanced enables mixed joints such as steel and aluminium to be produced even more economically
  • The technology integrates the polarity of the welding current, combined with a reversing motion of the wire, into the process control
  • It eliminates arc cut-off and the resulting process instabilities
  • Measurement and control of the arc length can be carried out mechanically via the wire movement independently of the arc voltage
  • At the moment the polarity changes, extremely high process stability is guaranteed
  • Two variants are available: the CMT Advanced process and the CMT Advanced Pulse process
  • The CMT Advanced Pulse process is a combination of a negative CMT phase and a positive pulse phase

Fronius UK

Fronius UK, a subsidiary of Fronius International, provides the UK welding market with solutions for MIG/MAG, TIG, electrode, laser, plasma and resistance spot welding and automation. Its new state-of-the-art facility in Milton Keynes extends over 3,800m2 and houses the Tech Support team, the Repair Center, a warehouse and a training area and epitomises the importance of being able to deliver a first-class service to customers.

Fronius UK, a subsidiary of Fronius International, provides the UK welding market with solutions for MIG/MAG, TIG, electrode, laser, plasma and resistance spot welding and automation. Its new state-of-the-art facility in Milton Keynes extends over 3,800m2 and houses the Tech Support team, the Repair Center, a warehouse and a training area and epitomises the importance of being able to deliver a first-class service to customers.

Sales and service teams, both at head office and regionally, ensure that customers are supported as quickly as possible on their own premises. In addition, customers benefit from services such as calibration, a warranty extension and a maintenance contract.

For decades, Fronius has made significant contributions to advances in welding technology. The company is still in family ownership and its welding technology division is now one of the world’s technology leaders in the arc welding market segment. It is also the market leader in Europe.

Welding Technology is one of three Fronius divisions. Since the 1940s, Fronius has been creating technologies and solutions for monitoring and controlling energy in battery-charging systems, and since 1992 the same in solar electronics. The mains-connected inverter, the unique Fronius Service Partner programme and products for monitoring photovoltaic systems make Fronius one of the leading suppliers in the field of solar electronics.

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