Download - PRESENTATION ON DRILLING MACHINE
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INTRODUCTIONINTRODUCTION
• DrillingDrilling is a metal cutting process carried out by a is a metal cutting process carried out by a
rotating cutting tool to make rotating cutting tool to make circular holescircular holes in solid in solid
materials.materials.
• Tool which makes hole is called as drill bit or twist drill.Tool which makes hole is called as drill bit or twist drill.
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TYPES OF DRILLING MACHINE.TYPES OF DRILLING MACHINE.
• Portable drilling machinePortable drilling machine
• Bench drilling machineBench drilling machine
• Radial drilling machineRadial drilling machine
• Pillar drilling machinePillar drilling machine
• Gang drilling machineGang drilling machine
• Multiple drilling machineMultiple drilling machine
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PORTABLE DRILLING MACHINEPORTABLE DRILLING MACHINE
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BENCH DRILLING MACHINEBENCH DRILLING MACHINE
• Vertical main columnVertical main column
• BaseBase
• Moving drill headMoving drill head
• Work table Work table
• Electric motorElectric motor
• Variable speed gear box Variable speed gear box
and spindle feed and spindle feed
mechanism. mechanism.
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RADIAL DRILLING MACHINERADIAL DRILLING MACHINE
• Heavy baseHeavy base
• Vertical columnVertical column
• Horizontal armHorizontal arm
• Drilling headDrilling head
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DRILLING MACHINE DRILLING MACHINE OPERATIONOPERATION
• ReamingReaming
• BoringBoring
• Counter boringCounter boring
• Counter sinkingCounter sinking
• Spot facingSpot facing
• Tapping Tapping
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REAMING REAMING
• It is a process of It is a process of smoothingsmoothing the surface of drilled holes the surface of drilled holes
with a tool.with a tool.
• Tool is called as reamer.Tool is called as reamer.
• Initially a hole is drilled slightly smaller in size.Initially a hole is drilled slightly smaller in size.
• Drill is replaced by reamer.Drill is replaced by reamer.
• Speed is reduced to half that of the drilling.Speed is reduced to half that of the drilling.
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BORING BORING
• It is process carried on a It is process carried on a
drilling machine to drilling machine to
increase the size of an increase the size of an
already drilled hole.already drilled hole.
• Initially a hole is drilled to Initially a hole is drilled to
the nearest size and using the nearest size and using
a a boringboring tool the size of tool the size of
the hole is increased.the hole is increased.
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SPOT FACINGSPOT FACING
• It is a finishing operation It is a finishing operation
to produce flat round to produce flat round
surface usually around a surface usually around a
drilled hole, drilled hole, for proper for proper
seating of bolt head or seating of bolt head or
nut.nut.
• It is done using a special It is done using a special
spot facing tool.spot facing tool.
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TAPPING TAPPING
• Process of cutting internal Process of cutting internal
threads with a thread tool threads with a thread tool
called as called as taptap..
• Tap Tap is a fluted threaded is a fluted threaded
tool used for cutting tool used for cutting
internal threadinternal thread
• Cutting speed is very Cutting speed is very
slow.slow.
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