A new invention for efficient preparation of welding seams for welding schools and companies

Kurzfassung

A Swedish inventor has developed a new technology in the area of welding. The purpose with the present invention is to securely prepare seams for plates as well as pipes/tubes in a cost-efficient way, and provide a safe working environment. The machine has few moving parts, low noise, low level of dust, and it can handle many different materials as long as they are electrically conductible. The inventor is looking for a license agreement or a commercial agreement with technical assistance.

Details

It is well known that schools for welding and companies of today use mechanical treatments such as cutting, turning, milling and planning for joint preparation of welding seams. The materials used are stainless steel (alloyed), aluminium and black plate (unalloyed). The teaching of welding can be carried out in such a way that the trainee provides samples of plates and/alternatively of pipes and tubes. Seam preparation of plates may be carried out by means of applying the work piece in a particular machine where use is made of oxygen and acetylene cutting. The method is expensive and time-consuming. With respect to seam preparation of pipes/tubes, a number of problems occur. The method is very costly, time-consuming, and comprises a number of hazardous operations. The cutting of the pipe/tube is carried out in a band saw machine, and alternatively by way of cutting wheel. Pipes/tubes are applied to a turning machine for the purpose of chamfering into a correct chamfer angle. These operations are hazardous from an industrial safety point of view.

The purpose with the present invention is to securely prepare seams for plates as well as pipes/tubes in a cost-efficient way, and provide a safe working environment. The machine provides seam preparation for plates as well as pipes/tubes. The machine is cost saving, decreases and eliminates the risk for injuries, and provides a high quality to the surfaces prepared. The combined construction of the machine, circular and linear movements, the step-less driving unit, and that in combination with a thermal cutting operation fulfils the purpose of the invention. For the thermal cutting operation, use is made of a plasma aggregate that mixes the protective gases argon, nitrogen and hydrogen in order to provide cuts without oxidation to materials such as stainless steel and aluminium. For unalloyed and low-alloy materials, use is made of ordinary compressed air from existing plants.

The machine can handle different kinds of materials such as: high and alloy light metal and stainless steel. As long as the material is electrically conductible the machine can work with it. The machine has few mowing parts, which ensures a maximum of precision in both circular and linear movements.

Innovative Aspects:
• Timesaving compared to present methods in preparing test coupons (2-5 times known methods)
• Cost of material, gases and education savings (20 - 50 %, repaid in 1-1,5 years at welding schools)