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CMT

CMT

CMT welding is a variant of MIG/MAG welding. This process has been developed for applications where a controlled low level of heat transfer is desired.

CMT welding is a variant of MIG/MAG welding. This process has been developed for applications where a controlled low level of heat transfer is desired. In ISO 4063 the process is referred to as process numbers 131 & 135

How does it work?

Cold Metal Transfer, or CMT welding, is a short-circuit arc process where another method of material transfer is used. With a conventional short-circuit arc weld, the short-circuit current is limited by a winding or by an inductive resistance at the source of the current itself. With the current source for CMT, the increase in the current after the short-circuit is limited by an electronic regulator.

The supply of welding wire is included in the electronic regulator. This way it is possible to ensure that the current and voltage are reduced almost to zero during the material transfer (see figure below).

 

 

The heat transfer is very small with CMT welding. The splatter is also greatly reduced thanks to the low short-circuit current. The electrode wire does not have to differ from the conventional MIG/MAG welding. The protective gas can also be the same as MIG/MAG for CMT welding. In general the CO2 content is higher – up to 100%.

Process variations

Cells

Basic Arc

This advanced welding cell is suitable for high levels of output and complex product operating conditions. The welding cells are fitted with remote diagnosis and &...

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Shuttle Arc

The Shuttle Arc Welding Cell has either one or two robots on a track allowing them to move along the jigs.

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Multi Arc

The Multi Arc Welding Cell with its one or two handling robots can provide high welding capacity. This machine concept makes it possible to carry out al...

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Compact Arc

This cell comprises of one robot and two load/unload welding positions. The jigs can be fixed or rotate via the external robot axes.

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LCC Basic Arc Welding Cell

De LCC Compact Arc Welding Cell is more than a piece of standard welding equipment; the module offers a simple and economic solution to automat...

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LCC Compact Arc

The LCC Compact Arc Welding Cell is ideal for your first step in robotics and provides production flexibility and a high output. This cell provides the possibility to autom...

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LCC XL Arc

The LCC XL Arc Welding Cell has been developed specifically for heavy products and is based on the design of the lean cells, offering flexibility and hi...

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