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Perfect Welding

What are multiprocess welding systems?

Why multiprocess welding systems?

Multiprocess welding systems are systems that can carry out more than one welding process to a high standard. Most welding systems are equipped to perform more than one of the three processes (MIG/MAG, MMA OR TIG), but this does not automatically make them multiprocess systems. For example, the technical capabilities of a MIG/MAG system also allow for the integration of the MMA welding process (reduced workload), and MMA welding can also be easily combined with the TIG welding process.

However, this usually leads to reduced output during one of the processes, affecting arc stability and welding performance. Thus, the devices do not demonstrate “true” multiprocess capability. The term “multiprocess” can only be applied to welding systems that are able to perform all three processes to virtually the same standard. Only then does the user see real added value compared with a welding system that specialises in just one process.

Questions on multiprocess series?

Devices in the multiprocess series can perform all three MIG/MAG, TIG and SMAW welding processes to a high standard. Whether on a construction site or in the workshop, the welder always has flexibility and is equipped for a range of applications.

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Challenges

Multiprocess vs standard welding system

Welding systems are predominantly divided into process capability, i.e. MIG/MAG, TIG or MMA. Devices that specialise in only one of these processes boast various functions so that the user can benefit from maximum welding performance and user-friendliness. For example, current TIG welding systems feature a module for high-frequency ignition. For MMA welding systems, ignition properties and high arc stability are the main focus. MIG/MAG systems are distinguished by numerous setting options, which allow the arc and weld seam to be adapted according to conditions. These functions only make the devices special devices for the respective process. In contrast, for multiprocess systems, flexibility of the tool is the primary concern: whatever the welding task, the user is always well equipped. What’s more, the devices are small, versatile and considerably more portable than standard devices. However, in order to combine all these properties in one device, some compromises have to be made: by way of example, additional functions such as high frequency ignition result in a heavier device and reduced mobility.

Solution

What makes a good multiprocess welding system?

In principle, the system should be able to perform all three processes without any specific drawbacks. To do so, the device must meet certain criteria:

  • Increased open circuit voltage for good MMA ignition properties
  • Second gas solenoid valve for TIG mode
  • TIG socket for direct welding torch connection with internal gas supply
  • TIG pulse welding – not strictly a must, but forms part of a TIG welding system
  • TMC (TIG Multi Connector) for using a TIG U/D welding torch
  • All three processes on one control panel
  • The control system must be able to regulate all three processes (control of gas solenoid valve, TMC for U/D TIG welding torch, motor control for MIG/MAG, FSC for U/D MIG/MAG welding torch)
  • Polarity reverser for using self-shielding flux core wires that must be welded on the negative pole

Advantages of multiprocess systems

  • Flexibility during the processes
  • Many materials and material thicknesses covered
  • Lower investment costs
  • Less training needed
  • Welding system can be adapted to the application

Disadvantages of multiprocess systems

  • Some drawbacks when carrying out processes
  • Device is larger in size than devices with max. two processes
  • Operation becomes more complex with each additional process

Fronius multiprocess welding systems



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The different welding processes in detail

The MIG/MAG welding process usually forms the basis for a multiprocess system. MIG/MAG systems are somewhat larger in size, as the other processes are integrated in the original device. The processes are explained in detail:

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