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CNC.pdf

  • 2. Scanned by CamScanner 1 F 1l l i . Th ' " n ' " ' " ï ' " . ' " a . u ït a bïe w o r d o r t e r m (zo m a r k a ) ; + T m c a n dltio n a t c Nc & a s m a 3 W r ite t he c o m p 1 e te n a m e s o f t he fo 1 lo w in g Fo rm a t IG Es , p p s , c A Q , DX F 4 0 n 1 a t he s , the Is r o ta te d a n d the R e m a in fix e d In m i1 lin g , the A re f1 x e d a n d t he Ro ta te 139 m a r k s ) a ) W r ite t he S 1 e e q Nc /c N c p r ? gr a m m in g pr o c e d u re ? b) W hy is C N C te c h n o 1 o gy u s e d in m o d e r r i in d u s t ry?? c ) W r ite 5 ty pe s o f C N C c o n t ro 1s ys t e m (s o ftw a re ) a n d e x p 1 a in o n e o f t he m ? d ) W n y w e u s e p 1 a s m a c u ttin g m a c hin e o r La s e r c u ttin g m a c h in e s o r w a te r je t c u ttin g m a c h in e s ? e ) W r ite t h e n a m e o f T y pe s o f z e r o a n d r e fe re n c e po in ts f o r fo 1 lo w in g fig 1 4? 5 1 ) W ri1 e M e blo c k p m g ra m o f [ ncB em eM eM . n ? : B . <
  • 3. Scanned by CamScanner & n a l Ex a m Su bi© CNC Q 3 a r k s ) a ) W r ite a n d d r a w t he w o rk p1 a n o f turni ng o pe ra tio n s fo r fo 1 1 o w in g fig (o n ly s te ps , w it h o u t in fo rm a tio n a bo u t T o o 1 s ) b) W r i e / d l1 @ s o t ç Eç o v e s g q y e Æ o n a 1n c ? c ) W ha t is t he c u ttin g t im e w he n 100 m m fe e d= o 2m m /r e v ? w o r k pie c e is m a c hin e d a t 1, ooom in - 1, w ith d ) W r ite t he in c r e m e n ta l a n d a bs o 1 u te p r o g r a m m in g fo r t his e x a m p 1 e ? Q 4 a ) W r ite C N C c o de p r o g r a m f o r the fo llo w in g e x a m p le o n 1 y in a b s o 1u t e pr o g r a m m in g w ith s p in d le ro ta t io n 500 RPM c lo c kw is e a n d fe e d r a te o f 7 , 5 a n d t he c u « in g d ire c tio n S A B C D E F G H 1A S u s e R o r 1 J K M e t ho d (a r c r a d iu s ) 2 3 i o g ' S2 e
  • 4. Scanned by CamScanner Ï. b) W r ite NC c o de pr o gr a m fo r fo 1 1 o w in g e x a m p1 e .-, $ k m i : :· Z
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  • 7. Scanned by CamScanner 9 / - Æ u ì . M m ?c aï þ - R· 1* o r?M . . leh . a t - / 4 a t 1 T) QLA - gTe r co [ïU?ô 4m pb y @L o m : _ La m t t 1a Lco l t» bòc Æ M o 1t u fa c lr ¢r r t . q L g e c (, c l , ' n 3 L* * - t nl t hî 1 qd eJ f i r . . .J U tî q LE tv g : U [ n p n 7w ?H r · / 1l t B b° P. ' ? äDpi B <, z r . N t r 1 s h i M ! Pn H An 7 r 04 i u 1 Lo 11 / U 2 19o m pTqi l uq C* l cha r lq e g a Rcpt o Bc+bi li BÝ» C 4 S1 : Bo o per < c { g ql BQ R c u 1 e C c m î 1 r É £)> l kø / M r r zin æ 7 ßûAv( B g þ, M Q Pt £ A # Ý f t Bm : etc w o r ì eßm j F?el '
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  • 9. Scanned by CamScanner I ' M in is t r y o f H ig h e r E d u c a t io n & S R e s e a r c h 2 S e a s o n a 1 E x a m U n iv e r s it y o f S a la h a d d in e H a w le r B S c S t u d e n t s C o 1 1 e g e o f E n g in e e r in g T im e a l1 o w e d 9 0 m in M e c h a n ic a 1 E n g D e p t D a t e 2 9 / 4 / 2 0 15 S u bje c t C N C L e c t u r e r D r A b d u 1k a d e r A l i L " h 1 m in m fo 1lo w iÄ b la n ks w it h a s u it a b le w o r d o r t e r m r m a r k s ) 3 T w o z e r o po in ts m u s t be d e fin e d be fo r e t he m illin g o r t u r n in g s ta r t ; t he y 4 W r ite t h e c o m p le t e n a m e s o f the fo l1 o w in g Fo r m a t 2 Ç5 ©i ñ! ui ' ï G A n d H c o d e s t he c N c m a c hin e s c a n u n de r s t a n d a n d f o 1 lo w t he in s t r u c t io n s t o p e r fo rm s pe c ifie d ta s k s Lo m 12§ m a m i a h i p fo r m a tio n a t t r u n in g c u tt in g d r a w fo llo w in g z o n e s : ( B , c T È ' p r im a r y s he a r in g z o n e , s e c o n da ry z o n e o f t he f a c e y c ) D r a w t he to o l w e a r lo c a t io n s a t t he c u t tin g? d ) D r a w t he f u n c tio n o f ? a n d 9 42 ? e ) W r ite t he m a in S te ps to c re a te a r a pid p ro to ty p in g m o de l w it h s ho r t E)
  • 10. Scanned by CamScanner c ) W r it e the W la n o f z e ro po in t fo r w o r k pie c e a t m illin g o n fig a , b , c , d pr F pr F pr F pr F pr F pr F pr F Æ Æ Æ Æ Æ Æ Æ (c ) J . (d ) d ) Ex p 1 a in the C NC B1 o c kq o gra m a n d d ra w il u s e th e X Y Co o rd in a tio n t o s h o w the 1a n d J : , å i N 30 G 90 G 02 X2 0 Y4 0 1 50 J40 F 100 M 0 8 i b m a r ks ) W r ite the C N C p r o g r a m fo r t he m il1 in g o f the fig u r e be 1 o w ? e ) Ex pla in the fig u r e a n d w he re w e u s e d it m d w he r e w hy ?