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Resistance Welding Techniques in Engineering Technology

Learn about resistance welding methods including spot welding, seam welding, and friction welding. Understand butt welding with flashing and its application in high carbon content steels. Tutorial prepared for teaching technical subjects in English.

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Resistance Welding Techniques in Engineering Technology

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  1. Anglicky v odborných předmětech"Support ofteachingtechnicalsubjects in English“ Tutorial: Engineering technology Topic: Resistancewelding Prepared by: Ing. Josef Martinák st. Projekt Anglicky v odborných předmětech, CZ.1.07/1.3.09/04.0002 je spolufinancován Evropským sociálním fondem a státním rozpočtem České republiky.

  2. Resistance welding

  3. Spot welding

  4. Spot welding – projection weld

  5. Resistance welding • Plates are pressed by copper electrodes • At the projected spot is heat welded

  6. Resistance seam welding between rollers • Plates are welded in successive steps by seam welding • Plates are pressed together by rollers • Pulsing welding current creates dense overlapped spot welds creating a continuous weld

  7. Resistance welding • Joint place is heated to required temperature • Pressure is applied to the place of joint • Electric current passes through welded material • Welding does not use additional material • Alternating single faze current of 1 to 20 Volts and up to 100 000 Amperes is used

  8. Friction welding • Friction welding creates a heat in the place of weld • Rotary friction welding • Welded are bolt’s heads, steel tubes • To a non-moving part is pressed rotating part • After achieving welding temperature rotating is stopped and pressing force is increased • When weld is cooled down, collar is removed

  9. Butt welding with flashing • Parts are clamped in jaws • Slightly pressed against each other • After switching on of electric current an electric arc is created • At the place of contact parts are melted • When the currentswitched off, parts are pressed together • Welding edge is created • This method is appropriate for steels with high carbon content

  10. Question and rehearsal • Explain welding procedure: • Pressure butt welding • Pressure butt welding with flashing • Seam welding

  11. Used literature • DILLINGER, Josef. A KOL. Moderní strojírenství pro školu i praxi. 1. Praha: Europa-Sobotáles, 2007. ISBN 978-80-86706-19-1. • M. HLUCHÝ, J. KOLOUCH, R. PAŇÁK. Strojírenská technologie II

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