To successfully merge two separate materials together, the best method to use is arguably friction welding, which allows for combining two solid structures successfully. Due to chemical and physical reactions taking place during the process, a mass of energy accumulates near the point of contact, making the whole process possible and the elements fully combined.
In the process of joining screws made of stainless steel with main reinforcement bars, we use the method of friction welding in accordance with the PN-EN ISO 15620 standard. The qualification of technology (WPAR) was performed by the Welding Institute in Gliwice. The great advantage of this solution is obtaining, within several seconds, a reliable, fully repeatable connection with very good quality and strength parameters. The process consists of using the force of friction to heat up and weld together the joined sections, which in the final phase, after stopping the rotary motion, swell by pressure.
Welds generated as a result of friction welding have a compact, stable, metallic structure on the entire cross-sectional area of the connection. Our friction welding machine operates in an automatic cycle using digital control. Each weld is monitored for compliance with the Welding Technology Manual (WPS). All data is saved and archived.
Friction welding relies on heating the outside layer of the merging elements (at first), which helps to draw out all of the imperfections. It is only on the next stage that the heat penetrates into the inside of the material and disperses evenly, finalizing the merging process between the two elements entirely.
Friction welding is very flexible – there are a great number of elements made from various materials that can be merged using this technique. This includes carbon steel, tool steel, stainless steel, copper, aluminum, metal alloys and many more. Regardless of which of them you combine together, the result (controlled thermo-mechanical treatment) will grant you a perfect weld every single time. Materials with different physical properties and diameter can be used safely in the process. High effectiveness and the ability to get the same effect every single time is a given when using this method, and it is very easy to achieve the highest standard of production on each attempt. Additionally, it grants complete control over every step of the cycle, with an option to intervene if the need arises.
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