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PPT on WELDING

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PRESENTATION ON WELDING FOR MECHANICAL STUDENTS

Publié dans : Ingénierie
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PPT on WELDING

  1. 1. PPRREESSEENNTTAATTIIOONN OONN WWEELLDDIINNGG
  2. 2. Welding
  3. 3. Welding Parts are joined together by Fusion. Fusion is brought about by a combination of heat and pressure between parts being joined. In normal welding processes very high temperatures and little or no pressure is used. Welding conditions • Smooth joint surfaces that match each other • Surfaces clean and free from oxides, grease and dirt. • Metals to be joined have same microstructure
  4. 4. Butt Joint A joint between two members aligned approximately in the same plane
  5. 5. Lap Joint A joint between two overlapping members
  6. 6. Lap Joints • Used to join two overlapping pieces of metal. • Single lap joint welded from one side. • Single lap joint welded from two sides develops full strength. • Off set lap joint is used when two pieces of metal need to be joined in the same plain.
  7. 7. PROCEDURE TO MAKE BUTT JOINT • Set the machine for welding purpose. • Clean the welding area and put two pieces on the table. • Make tack on the both end of the joints. • Start welding from one side to another and of work pieces. • Allow the joint to cool. • Remove slag by chipping hammer. • Finish the welding by wire brush
  8. 8. PROCEDURE TO MAKE LAP JOINT • Set the machine for welding purpose. • Clean the welding area and put two pieces on the table. • Make tack on both end of the joint. • Start welding from one side to another side. • Allow the joint to cool. • Reweld if necessary.
  9. 9. SAFETY PRECAUTIONS • Set the current and voltage properly. • The welding should be done in properly ventilated area • Make sure that the floor is dry.

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