wire drawing ppt
DESCRIPTION
wire drawing machine,fully automatedTRANSCRIPT
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PRESENTATION ON WIRE DRAWING .
BY AKASH
SAMANTA4TH YR
EE,GNIT.
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CONTENTS.• 1.INTRODUCTION.
• 2.PROCESS.
• 3.TYPES OF MACHINE.
• 4.LUBRICATION.
• 5.DRAWING DIES.
• 6.EQUIPMENT & TOOLS.
• 7.GENERAL FEAUTURES.
• 6.IMPORTANTS OF PLC.
• 7.CONCLUSION.
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INTRODUCTION.• 1.WIRE DRAWING IS A METAL WORKING
PROCESS USED TO REDUCE THE CROSS SECTION AREA OF WIRE.
• 2.THE PRODUCT MAY BE ELECTRICAL WIRING, CABLES,TENTION-LOADED STRUCTURE COMPONENTS ETC.
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Drawing Process.• 1.PROCESS IS QUIT SIMPLE IN CONCEPT.
• 2.AT FIRST WIRE IS SHRINKING .THE BEGING OF IT BY HAMERING FILING,ROLLING OR SWAGING THAT IT WILL FIT THROUGH THE DIA.
• 3.THEN IT IS PULLED THROUGH THE DIA.
• 4.IT REQUIRE MORE THANE ONE STEP TO PRODUCE ONE TYPE
• 5.In this process the cross section of wire is reduced by pulling it through a die.
• 6.Die angle has great influence on the drawing force and the quality of the drawn product
7.Drawing FORCE : F = Yavg Af In (Ao/Af) ; Yavg – average true stress of the material
in the die gap
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TYPES OF WIRE DRAWING MACHINETHERE ARE VARIOUS TYPE OF WIRE DRAWING MACHINE BUT THE BASIC TYPES ARE -1.SINGE STEP2.CONTINUOUS WIRE DRAWING.
1.SINGE STEP MACHINE. 2.CONTINUOUS WIRE DRAWING MACHINE.
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LUBRICATION DURING WIRE DRAWING
PRORER LUBRICATION IN THE DWARING PROCESS IS VERY NECESSARY FOR SMOOTH SURFACE FINISH AND LONG DIA LIFE.
TYPES OF LUBRICATION---1.WET DRAWING.2.DRY DRAWING.3.METAL COATING.4.ULTRASONIC VIBRATION.
TYPES OF LUBRICATS-1.OIL.2.CUPPER SULFATE SOLUTIONETC
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CONCEPT OF DIE.
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DIE MATERIALS.• 1.TUNGSTEN CARBIDE:Lowest cost,shock
resistance,large sizes available,lower life epectancy.USED-for steel wire drawing.
• 2.NATURAL DIAMONDS:Wear resistance,gives excellent wire surface,high thermal conductivity,longer life expectancy,limited availability in required high quality &quantity.
• 3.SYNTHETIC SINGLE CRYSTAL:Consistently uniform material,gives excelent wire surface,high thermal conductivity,larger size ranges are still costly at this time.
• 4.POLY CRYSTALLINE DIAMOND:Excels in life expectancy,wear resistance of diamond,shock resistance of carbide,high availability,cost effectiveness,high drawing force,smaller fines requires more filtration,may be damaged by temp.above 700c,wire surface condition less than from natural dimond.
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Equipment and tools.1.POINTERS:Pointers as the name implies
is used to put a taper (or point on the start
end of the wire so that it can be threaded
through the die.
2.PULL IN DOGS: Pull in dogs are used to
grip the wire end as it comes through the
die and once the dog is fastend to the block
the wire can be pulled through the die and
will then wrap round the block.
3. BUTT WELDERS:Butt welders Are used
to join wire ends. BUTT WELDERS . .
PULL IN DOGS. POINTERS.
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GENERAL FEAUTURES.• 1.DRAWING BLOCKS.• 2.MAIN BLOCK FRAME.• 3.TRANSMISSION.• 4.MAIN MOTORS.• 5.SENSOR ARMS.• 6.DIEBOXES.• 7.SAFETY GUARDS.• 8.WATER COOLING &• VENTILATION.• 9.ELECTRICAL• EQUIPMENT.
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IMPORTANCE OF PLC IN WIRE DRAWING WORKS.
1.PROVIDE CONSTANT SPPED OF MOTOR.
2.MAINTAIN CONSTANT DRAWING FORCE.(IMPORTANT)
3.WE CAN GET VARIOUS AWG WIRE FROM A SAME MACHINE BY CHANGING THE PROGRAMME OF PLC.
4.VERY HIGH ACCURACY.
5,SAVING IN LABOUR COST.AND MANY MORE
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CONCLUSION.
Drawing provide ways to formDrawing provide ways to form
shapes with uniform crossshapes with uniform cross
sections at high production rates.sections at high production rates.
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