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free download underwater welding seminar ppt

Underwater Welding

Welding is an unavoidable process of modern engineering ? civil, electrical, mechanical, automobiles, marine aeronautical ? in all branches. It is used in fabrications and erections in infrastructures and installations. It joins metals or thermoplastics. Forming a pool of molten mass ? the weld puddle ? and allowing it to cool to become a strong joint is the basis of the process of welding. For repairing to be carried out underwater, there is a separate process. That is called un ....etc

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Ultrasonic plastic welding is the joining or reforming of thermoplastics through the use of heat generated by the high frequency mechanical movement. It is achieved by converting high frequency electrical energy into high frequency mechanical motion. This mechanical movement, together with the applied force, creates frictional heat on the mating surfaces of the plastic components (joint area) so that the plastic material melts and forms a molecular bond between the parts. The following drawings illustrate the basic principle of ultrasonic weldi ....etc

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http://seminarsprojects.net/Thread-ultrasonic-metal-welding?pid=33399&mode=threaded

http://seminarsprojects.net/Thread-welding-of-metals

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ABSTRACT

Ultrasonic metal welding is a solid state welding process, and here ultrasonic vibrating motion is used to join two materials. The two work pieces are held in between the anvil and sonotrode. The work piece on the anvil is hold stationary while the other part is moved to and fro due to the vibrating effect of the sonotrode. This movement the oxide disperses layer in between them and atoms of the work pieces are diffused from one part to another. When vibration is stopped a pure metallurgical bond is obtained.
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Welds In Proe And Ansys Workbench Ttu Cae Network
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Finite Element Analysis Of Welded Joints Ioaj
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orbital welding ppt free download

Orbital welding first found use in the 1960 s when the aerospace industry recognized the need for a superior joining technique for aircraft hydrolic lines. The solution: a mechanism to rotate a welding arc from a tungsten electrode around a tube-weld joint. Regulating weld current with a control system automated the entire process. The result was a more precise, reliable method than manual welding.

Purpose

To provide leak proof joint between Tube to Tube sheet in Condenser in addition to Forced expansion. ....etc

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