5/7. Wire Drawing | Wire Drawing Process | Wire Drawing Machine | in Hindi

To enjoy our add free lectures, install our android app SHANTI CLASSES from Play Store. https://play.google.com/store/apps/details?id=co.haward.xwnuc #Extrusion_And_Drawing_by_ASKAzad Wire Drawing, Bar Drawing, Swaging, Lubrication Box, Cleaning and Lubrication in Wire Drawing, Acid Pickling, Sulling, Phosphating, Electrolytic Coating, Grees, Lime Water, Alkaline Cleaning, Phoshate Cleaning, Lubricating with reactive Soap and Problem Practice. Wire Drawing cont... Starting stock in coil form Draw block Lubrication box Die Direction oforn of travel Wire Drawing . A cold working process to obtain wires from rods of bigger diameters through a die Same process as bar drawing except that it involves smaller-diameter material . At the start of wire drawing, the end of the rod or wire to be drawn is pointed to make for an easier entrance of wire into the die. This pointing is done by means of rotary swaging or by simple hammering. Wire Drawing cont.. Wire getting continuously wound on the reel e For fine wire, the material may be passed through a number of dies, receiving successive reductions in diameter, before being coiled and known as Tandem Drawing . The wire is subjected to tension onlv. But when it is in contact with dies then a combination of tensile, compressive and shear stresses will be there in that portion only. Wire drawing is always a cold-working process, need sufficient ductility, may be annealed before drawing IES 2007 Which metal forming process is used for manufacture of long steel wire? (a) Deep drawing (b) Forging (c) Drawing (d) Extrusion ES 2009 Which one of the following stress is involved in the wire drawing process? (a) Compressive (b) Tensile (c) Shear (d) Hydrostatic stress ES 2005 Which of the following types of stresses is/are involved in the wire-drawing operation? (a) Tensile only (b) Compressive only (c) A combination of tensile and compressive stresses (d) A combination of tensile, compressive and shear stresses GATE-1987 For wire drawing operation, the work material should essentially be (a) Ductile (c) Hard (b) Tough (d) Malleable Statement (I) : In wire-drawing, the end of the stock is made 'pointed' to make for easier entrance of the wire into the die Statement (II) : The pointing of the wire is done exclusively by rotary swaging and not by simple hammerin (a) Both Statement (I) and Statement (II) are individually true and Statement (II) is the correct explanation of Statement (I) (b) Both Statement (I) and Statement (II) are individually true but Statement (II) is not the correct explanation of Statement (I) (c) Statement (I) is true but Statement (II) is false (d) Statement (I) is false but Statement (II) is true g. Cleaning and Lubrication in wire Drawing . Cleaning is done to remove scale and rust by acid pickling. Lubrication boxes precede the individual dies to help reduce friction drag and prevent wear of the dies. Sulling: The wire is coated with a thin coat of ferrous hydroxide which when combined with lime acts as filler for the lubricant. . Phosphatinq: A thin film of Mn, Fe or Zn phosphate is applied on the wire. Electrolytic coating: For very thin wires, electrolytic coating of copper is used to reduce friction 293 IES 201O Assertion (A): Pickling and washing of rolled rods is carried out before wire drawing, Reason (R): They lubricate the surface to reduce friction while drawing wires. (a) Both A and R are individually true and R is the correct explanation of A (b) Both A and R are individually true but R is NOT the correct explanation of A (c) A is true but R is false (d) A is false but R is true #ASKAzad ------------------------------------------------------------------------ You can also join us on different social platform Join our new Telegram Group for getting regular updates about new uploaded videos and discussion with admins. 💐 A.S.K.Azad Mechanical Engineering https://t.me/ASKAzadMechanicalEngineering Become a member of @SHANTI CLASSES (A.S.K.Azad Mechanical Engineering) to get exclusive access to perks! /channel/UCQOcoDkqHPiqpubEg0Y-oQw/join My YouTube Channel: "A S K Azad Science & God" /user/abhinandankumar20101 Follow me on Twitter: "Physics, Chemistry, Biology & Mathematics" (@A_S_K_Azad): https://twitter.com/A_S_K_Azad My Blog: "Abhinandan Kumar Azad" http://abhinandankumar2010.blogspot.com/?m=1 My Instagram: "abhinandankumar2010" https://www.instagram.com/abhinandankumar2010/ ------------------------------------------------------------------------ #ShantiClasses #SPC #ASKAzad

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