Squaring of tubes before welding can be interesting for various reasons, and especially for automated or orbital welding applications. Only thin tubes with wall thicknesses no bigger than 3mm are concerned, which generally have to be welded by simple fusion.
Simple fusion means that two workpieces have to be butt-welded without any seam without any gap and without adding wire. This is the most important fact: the surface conditions of the workpieces have a direct impact on the quality of the assembly.
Here you can discover 3 reasons that explain you when squaring of workpieces is necessary before welding:
Squaring of tubes is generally done with very sharp HSS blade: the edge breaking tool creates one only chip (forming) which provides a very precise RA surface quality.
Certain industries require high quality finishes like squaring preparation. This is for example the case in the semiconductor fabrication, the pharmaceutical or biopharmaceutical market. These applications need squaring, even if the tube has been cut perfectly straight and perpendicular with an orbital cutting machine.
Using orbital cutting machines provides you with the highest quality cuts but they form tiny scratches due to the use of the blade. This is not acceptable for very high-end applications, even if you cannot see these scratches with the human eye. Parameters such as rotation speed, combined with the travel speed - have a certain influence on the final result. This surface quality is largely good enough for most applications, such as in the food industry for example.
A complete range of squaring machines for thin walled tubes?
Other aspects linked to the quality of cutting and the perpendicularity or presence or scratches can also be corrected. In fact sometimes cuts are made with abrasive tools or saw bands. In these cases the cuts are not precise enough for an automated welding operation. A squaring machine can also help to complete an approximate cut.
On site and when it comes to maintenance, tubes often need to be cut directly in an installation in order to be replaced. This is often done with roller tube-cutters. This is a tube distortion process that does not create any chip, just a small quantity of metal dust.
But, tubes cut by distortion cannot be welded without bringing them to conformity by squaring.
All our squaring machines (besides the two versions with a concentric clamping system) are compact and more or less light (depending of the size). They can be used anywhere on site!
This is a very strategic item: Mastering the tube preparations in order to master perfect orbital weldings. This is the reason why we develop machines for tube preparation as well as welding equipment. Due to this strategy you can master the whole production line and realize high quality welds with an up to 100 % repeatability quote! Don't hesitate to contact our teams, they will be happy to help you with your project!