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a)..Parallel..ActionAutomatics/Multiple..Flow..m/c:..83OperationsonLathe...Movement...of...the...job...is...rotation...about...spindle...axis......Tool...is...fed...against...the...revolving...work......Movement...of...the...tool...is...either...parallel...to...or...at...any...inclination...to...the...work...axis...12Design[edit]....Standard....bent-tail....lathe....dog........Most....commonly....used....for....round....workpieces........Available....with....square-head....setscrews....of....headless....setscrews........Straight-tail....lathe....dog........Driven....by....stud....in....drive....plate........Used....in....precision....turning....55..These..machines..are..used..for..machining..long..accurate..parts..of..small..diameter.(2..to..25mm)Similarly,..CNC..chuckers..were..developed,..eventually..evolving..even..into..CNC..rotary..transfer..machinesThis...is...because...the...few...companies...that...have...them...tend...to...be...forced...to...continually...adapt...to...the...latest...state...of...the...art...(which...today...is...all...CNC)...in...order...to...compete...and...thus...survive
of...spindles...in...machineChoice...of...machines...and...control...type[edit]Feed...Drill...Quill...clamp...moving...quill...Tail...stock...clamp...Tail...stock...33Machines....are....simple....in....designLathe....Definition....Lathe....is....a....machine,....which....removes....the....metal....from....a....piece....of....work....to....the....required....shape....and....size..Scrap..loss..is..reduced..by..reducing..operator..errorWorking...principle...of...lathe......If...the...tool...moves...inclined...to...the...axis...it...produces...a...taper...surface...and...is...called...taper...turningCNC....screw....machines....do....this....to....an....even....greater....degree,....but....they....are....expensiveAll..of..the..above..machine..tools..(i.e.,..screw-cutting..lathes;..suitably..equipped..engine..lathes..and..bench..lathes;..turret..lathes;..turret-lathe-derived..screw..machines;..and..wood-screw-factory..screw..machines)..were..sometimes..called.."screw..machines"..during..this..era..(logically..enough,..given..that..they..were..machines..tailored..to..screw..making)Tool....layout....88The....CNC....turning....center....most....appropriately....fits....in....the....mid-range....of....production,....replacing....the....turret....lathe72(1965),...A...Short...History...of...Machine...Tools,...Cambridge,...Massachusetts,...USA:...MIT...Press,...OCLC250074Close....up....view....of....a....Brown....&....Sharpe....Single....Spindle....screw....machine19Humans....have....been....making....screws....since....ancient....times7682Bullard..Mult-Au-Matic,..a..vertical,..multispindle..automatic..lathe,..1914.[2]..There,....local....innovators....also....developed....further....creative....tooling....for....the....machines....and....built....clone....machine....models 3c092786bf
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