broaching, sawing and filing-2

8/9/2019 Broaching, Sawing and Filing-2

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Broaching, Sawing andFiling

Chapter 27


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Broach


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Broaching Process Originally developed for producing

internal keyways. Multi-tooth cutter, single pass operation sed in production to !nish holes,

splines, and "at surfaces. #apid operation, low cycle ti$es. %& 2' to (' ft)$in* +cellent surface !nish produced %2 to

2( $icro-inches* +cellent tolerance


4/31

Broach Construction /ong $ultitooth cutter with

progressively deeper teeth, rise

per tooth #ise per tooth0

1urface0 '.'' to '.'' inches)tooth

3nternal0 '.'' to '.''2( inches)tooth Chips produced are held in tooth

gullet during process


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Broach Construction Materials0

4igh 1peed 1teel 411 with 5i6 coating 5ungsten Caride teeth %$ass prod.*

1tyles0 1olid 1hell 1ections %larger surface*

1hapes

4oles %round, s8uare, he, 9* :eyways 3nternal 1plines and gears ;lat surfaces 1piral splines, gun arrel ri"ing


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Broaching #e8uire$ents5wo teeth contact surface

Part $ust e ale to withstand

high forces %( to '' tons)in2*

1urface $ust e accessile

4igh tool cost


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Broaching Machines Presses

&ertical Pull


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Broaching Machines&ertical -


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Broaching Machines&ertical 1urface


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Broaching Machines

4ori>ontal

Capacity0 -2' tons Cutting 1peed0 (-?'

;PM


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Broaching Machines 4ori>ontal

1urface Broach

' ton 2'= screw drive

Operation0 roach@et engine turine

wheel rotor slots


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Broaching Machines Continuous Chain Broach

Part0


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1awing Three styles of blades

4acksaw

Bandsaw

Circular or cold saw


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1awing Blade Material

4acksaw, 411

Bandsaw %teeth electron ea$ welded tosteel ack* 411 teeth 411 with 5i6 coating

5ungsten Caride 5ungsten Caride grit


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1aw 5ooth ;or$ #egular, 1tandard,

Precision

1kip, Buttress

Claw, hook


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1aw 5ooth 1et #egular

lu$inu$,plastics wood

#aker eneral Purpose

Cutting

Dave Cutting thin $aterial


17/31

Blade Construction

Didth e of teeth ullet si>e 6u$er of teeth in contact with work


18/31

Machinery&ertical Bandsaws


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Machinery4ori>ontal Bandsaws


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Machinery


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Machinery/arge


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Machinery

Cold 1aw 411, Caride 5ipped Blades

Manual uto$atic

?= to E= lade


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Machinery

Power 4acksaw ccelerated

return stroke ofsaw ow

Cuttingcapacities up toE=


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;iling

sed to re$ove s$all a$ounts of$aterial

1hapes


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;iles

$erican Pattern

6eedle ;iles


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5ypes of 5eeth

1ingle Cut #ows of teeth at (H-E(H


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;ile Coarseness

$erican Pattern ;iles 1$ooth

1econd Cut Bastard

1wiss Pattern ;iles

6o. '', ', , 2, , ? and 5he degree of coarseness is

greater for longer !les


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;iling Machines


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;iling Machines


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;iling Machines

Band ;ilingMachine


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#otary Burrs

broaching, sawing and filing-2

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