TPT July 2014

Technology News

A perfect standard solution for specific demands

for welding torches based on twelve different basic designs, which will be completed by the welding lances that perfectly suit the customer’s applications in terms of capacity and length. The final certification of this range of welding torches does not only rely on the experience, since for every torch, additional tests have been developed in order to optimise the final result. Jean- Pierre Barthoux, head of technological department, explains: “While developing a new type of torch, it has always been very difficult to examine the behaviour of the different gases because of high luminosity and heat near to torch. Video transmissions helped us to understand the welding operation, but we lost a huge amount of time in order to obtain the perfect result for every new application.” Each torch has been examined with specific tests in order to analyse the various gas flows and forms. This optical test by striae scope (also called Schlieren’s test, after the name of the inventor) reveals the density of the flows, or more precisely the refractive index by deviation of the light. The deviation is analysed with the help of compressed whirlwind, differences in temperature or chemical composition. With the introduction of this technology, the engineers of Polysoude are now able to foresee gas behaviour and its influence on the final welding result.

excellent result, but the result would only be a modification of the behaviour of the gas streams. Due to the empirical experience, this company is now recognised as a specialist in this field for many industrial applications. Over time a great variety of specific torches have been developed, for automated or mechanised TIG welding and for cladding solutions. Different ranges of torches have been designed and manufactured for both of these technologies, and validated every time in terms of performance rates for duty cycle, temperature resistance, shielding protection and camera transmission. In this way, Polysoude has created a complete catalogue

IN the field of welding, every application has different technical requirements. Each welding torch manufacturer has to find the best solution to meet customers’ requirements according to the alloy to be welded, the bevel and the type of the root, and the working conditions: the perfect weld without any porosity, without traces of discoloration or residues, thus avoiding further expensive interventions or even the scrapping of the work piece. Polysoude has taken this problem into account: a problem which costs a large amount of time in terms of research and development. One would have thought that an additional amount of shielding gas could guarantee an

Polysoude – France Website: www.polysoude.com

Part of the welding and cladding lance ranges

Inside tube scarfing systems ERNST Blissenbach GmbH develops solutions for the removal of the internal weld in HF longitudinally welded tubes. Customers’ needs are met through core competences in development, systems and service. us,” said Ernst Blissenbach, the owner and managing director, referring not only to the close cooperation with long-standing customers but also to his relationship with his employees and social stability. “We are all part of our economy and should create jobs, stabilise the economy, demonstrate commitment to our region and society and prove our innovative drive on a daily basis.” BLISSart ® custom tools provide a high degree of know-how, precision, intelligent technology, durability, integrative broadening of potential and an effective increase in production output. “Maximum continuity is of the utmost importance to Mr Blissenbach continued, “Our technological innovations constitute an

intelligent symbiosis between intensive tool and process research and the indispensable Blissenbach advantage. We communicate with our customers to fine-tune our product development to their tube production, and come up with new ideas and solutions for advanced inside tube scarfing processes.” Ernst Blissenbach GmbH – Germany Email: info@blissenbach.de Website: www.blissenbach.de

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J uly 2014