8/20/2019 MT 2, unit 1

1/60

MECH - KITE

MANUFACTURING TECHNOLOGY II

IV SEMESTER

MECHANICAL ENGINEERING

8/20/2019 MT 2, unit 1

2/60

SESSION 1

MECH - KITE

SESSION 2

8/20/2019 MT 2, unit 1

3/60

MECH - KITE

Objective of MT II

To !"e#$t%!" t&e co!ce't %!" b%$ic(ec&%!ic$ of (et%) ctti!*

To !"e#$t%!" +o#,i!* of $t%!"%#" (c too)$

$c& %$ )%t&e. $&%'e#. (i))i!* (c. "#i))i!* (c.

*#i!"i!*. %!" %))ie" (%c&i!e$

To !"e#$t%!" t&e b%$ic co!ce't$ of CNC

(%c&i!e too) %!" CNC '#o*#%((i!*

8/20/2019 MT 2, unit 1

4/60

8/20/2019 MT 2, unit 1

5/60

MECH - KITE

I!t#o"ctio!

MT i$ $t"/ of '#oce$$e$ #e0i#e" to (%,e'%#t$

T&e$e '%#t$ %#e t&e! $e" i! (ec&%!i$( %!"

(%c&i!e$

#oce$$ c%! be (et%) ctti!* o# (et%) fo#(i!*

%#t i$ obt%i!e" b/ ctti!* o'e#%tio! (et%)

ctti!*

Met%) i$ $&%'e" !"e# '#e$$#e %!" &e%t

(et%) fo#(i!*

8/20/2019 MT 2, unit 1

6/60

MECH - KITE

M%!f%ct#i!* '#oce$$

Metal working

Metal cutting process

( e.g.: Turning,

Shaping, Drilling)

Metal forming process

(e.g.: Rolling,

Forging, Stamping)

8/20/2019 MT 2, unit 1

7/60

MECH - KITE

3%$ic objective$ of *oo" (%c&i!i!* '#%ctice

4ic, (et%) #e(ov%)

Goo" $#f%ce fi!i$&

Eco!o(ic%) too) co$t

Le$$ 'o+e# co!$('tio!

8/20/2019 MT 2, unit 1

8/60

MECH - KITE

M%c&i!e too) t/'e$

Machine tools

General purpose Single purpose ro!uction"imite! purpose Speciali#e!

8/20/2019 MT 2, unit 1

9/60

4e$tio!$

Short answers

15 6&%t i$ t&e objective of MT II 7

25 6&%t %#e t&e 2 t/'e$ of (et%) +o#,i!* '#oce$$ 7

85 6&%t %#e t&e b%$ic objective$ of *oo" (%c&i!i!* '#%ctice 7

95 Give (%c&i!e too) c)%$$ific%tio!

:5 Give 2 e;%(')e$ of (et%) fo#(i!* '#oce$$

 

MECH - KITE

8/20/2019 MT 2, unit 1

10/60

SESSION 2

MECH - KITE

8/20/2019 MT 2, unit 1

11/60

MECH - KITE

M%te#i%) Re(ov%) #oce$$e$

 A f%(i)/ of $&%'i!* o'e#%tio!$. t&e co((o!fe%t#e of +&ic& i$ #e(ov%) of (%te#i%) f#o( %

$t%#ti!* +o#,'%#t $o t&e #e(%i!i!* '%#t &%$ t&e

"e$i#e" *eo(et#/

M%c&i!i!* (%te#i%) #e(ov%) b/ % $&%#'ctti!* too). e5*5. t#!i!*. (i))i!*. "#i))i!*

 Ab#%$ive '#oce$$e$ (%te#i%) #e(ov%) b/

&%#". %b#%$ive '%#tic)e$. e5*5. *#i!"i!*

No!t#%"itio!%) '#oce$$e$ - v%#io$ e!e#*/fo#($ ot&e# t&%! $&%#' ctti!* too) to #e(ove

(%te#i%)

8/20/2019 MT 2, unit 1

12/60

MECH - KITE

Ctti!* %ctio! i!vo)ve$ $&e%# "efo#(%tio! of +o#,(%te#i%) to fo#( % c&i'

  A$ c&i' i$ #e(ove". !e+ $#f%ce i$ e;'o$e"

Fi*#e 2152

8/20/2019 MT 2, unit 1

13/60

MECH - KITE

6&/ M%c&i!i!* i$ I('o#t%!t

V%#iet/ of +o#, (%te#i%)$ c%! be (%c&i!e"

Mo$t f#e0e!t)/ $e" to ct (et%)$

V%#iet/ of '%#t $&%'e$ %!" $'eci%) *eo(et#ic

fe%t#e$ 'o$$ib)e. $c& %$?

Sc#e+ te%"$

 Acc#%te #o!" &o)e$

Ve#/ $t#%i*&t e"*e$ %!" $#f%ce$

Goo" "i(e!$io!%) %cc#%c/ %!" $#f%ce fi!i$&

8/20/2019 MT 2, unit 1

14/60

MECH - KITE

@i$%"v%!t%*e$ +it& M%c&i!i!*

6%$tef) of (%te#i%)

C&i'$ *e!e#%te" i! (%c&i!i!* %#e +%$te"

(%te#i%). %t )e%$t i! t&e !it o'e#%tio!

Ti(e co!$(i!*

 A (%c&i!i!* o'e#%tio! *e!e#%))/ t%,e$ (o#e

ti(e to $&%'e % *ive! '%#t t&%! %)te#!%tive

$&%'i!* '#oce$$e$. $c& %$ c%$ti!*. 'o+"e#

(et%))#*/. o# fo#(i!*

8/20/2019 MT 2, unit 1

15/60

MECH - KITE

M%c&i!i!* i! M%!f%ct#i!* Se0e!ce

Ge!e#%))/ 'e#fo#(e" %fte# ot&e# (%!f%ct#i!*'#oce$$e$. $c& %$ c%$ti!*. fo#*i!*. %!" b%#

"#%+i!*

Ot&e# '#oce$$e$ c#e%te t&e *e!e#%) $&%'e

of t&e $t%#ti!* +o#,'%#t M%c&i!i!* '#ovi"e$ t&e fi!%) $&%'e.

"i(e!$io!$. fi!i$&. %!" $'eci%) *eo(et#ic

"et%i)$ t&%t ot&e# '#oce$$e$ c%!!ot c#e%te

8/20/2019 MT 2, unit 1

16/60

MECH - KITE

M%c&i!i!* O'e#%tio!$

Mo$t i('o#t%!t (%c&i!i!* o'e#%tio!$? T#!i!*

@#i))i!*

Mi))i!*

Ot&e# (%c&i!i!* o'e#%tio!$?

S&%'i!* %!" ')%!i!*

3#o%c&i!*

S%+i!*

8/20/2019 MT 2, unit 1

17/60

MECH - KITE

Si!*)e 'oi!t ctti!* too) #e(ove$ (%te#i%) f#o( %#ot%ti!* +o#,'iece to fo#( % c/)i!"#ic%) $&%'e 

Fi*#e 2158 Tee (o$t co((o! (%c&i!i!* '#oce$$e$?

8/20/2019 MT 2, unit 1

18/60

SESSION 8

MECH - KITE

8/20/2019 MT 2, unit 1

19/60

MECH - KITE

U$e" to c#e%te % #o!" &o)e. $%))/ b/ (e%!$ of% #ot%ti!* too)

8/20/2019 MT 2, unit 1

20/60

MECH - KITE

Rot%ti!* ()ti')e-ctti!*-e"*e too) i$ (ove"%c#o$$ +o#, to ct % ')%!e o# $t#%i*&t $#f%ce

T+o fo#($? 'e#i'&e#%) (i))i!* %!" f%ce (i))i!*

Fi*#e 2158

8/20/2019 MT 2, unit 1

21/60

MECH - KITE

Ctti!* Too) C)%$$ific%tio!

15 Si!*)e-oi!t Too)$ O!e "o(i!%!t ctti!* e"*e

oi!t i$ $%))/ #o!"e" to fo#( % !o$e

#%"i$

T#!i!* $e$ $i!*)e 'oi!t too)$

25 M)ti')e Ctti!* E"*e Too)$

Mo#e t&%! o!e ctti!* e"*e

Motio! #e)%tive to +o#, %c&ieve" b/ #ot%ti!* @#i))i!* %!" (i))i!* $e #ot%ti!* ()ti')e

ctti!* e"*e too)$

8/20/2019 MT 2, unit 1

22/60

MECH - KITE

Fi*#e 2159 %!"

8/20/2019 MT 2, unit 1

23/60

MECH - KITE

Ctti!* Co!"itio!$ i! M%c&i!i!*

Tee "i(e!$io!$ of % (%c&i!i!* '#oce$$?  Ctti!* $'ee" v   '#i(%#/ (otio!

Fee" f   $eco!"%#/ (otio!

@e't& of ct d   'e!et#%tio! of too)

be)o+ o#i*i!%) +o#, $#f%ce

Fo# ce#t%i! o'e#%tio!$. (%te#i%) #e(ov%)

#%te c%! be co('te" %$

R MR   v f d  

+&e#e v   ctti!* $'ee"> f   fee"> d  

"e't& of ct

8/20/2019 MT 2, unit 1

24/60

MECH - KITE

Ctti!* Co!"itio!$ fo# T#!i!*

Fi*#e 215: S'ee". fee". %!" "e't& of ct i! t#!i!*5

8/20/2019 MT 2, unit 1

25/60

SESSION 9

MECH - KITE

8/20/2019 MT 2, unit 1

26/60

MECH - KITE

Ro*&i!* v$5 Fi!i$&i!*

I! '#o"ctio!. $eve#%) #o*&i!* ct$ %#e $%))/t%,e! o! t&e '%#t. fo))o+e" b/ o!e o# t+ofi!i$&i!* ct$

Ro*&i!* - #e(ove$ )%#*e %(o!t$ of (%te#i%)

f#o( $t%#ti!* +o#,'%#t C#e%te$ $&%'e c)o$e to "e$i#e" *eo(et#/.

bt )e%ve$ $o(e (%te#i%) fo# fi!i$& ctti!*

Hi*& fee"$ %!" "e't&$. )o+ $'ee"$

Fi!i$&i!* - co(')ete$ '%#t *eo(et#/

Fi!%) "i(e!$io!$. to)e#%!ce$. %!" fi!i$&

Lo+ fee"$ %!" "e't&$. &i*& ctti!* $'ee"$

8/20/2019 MT 2, unit 1

27/60

MECH - KITE

M%c&i!e Too)$ 

 A 'o+e# "#ive! (%c&i!e t&%t 'e#fo#($ %‑

(%c&i!i!* o'e#%tio!. i!c)"i!* *#i!"i!*

F!ctio!$ i! (%c&i!i!*?

Ho)"$ +o#,'%#t

o$itio!$ too) #e)%tive to +o#,

#ovi"e$ 'o+e# %t $'ee". fee". %!" "e't&

t&%t &%ve bee! $et

T&e te#( i$ %)$o %'')ie" to (%c&i!e$ t&%t

'e#fo#( (et%) fo#(i!* o'e#%tio!$

8/20/2019 MT 2, unit 1

28/60

MECH - KITE

Si(')ifie" 2-@ (o"e) of (%c&i!i!* t&%t "e$c#ibe$t&e (ec&%!ic$ of (%c&i!i!* f%i#)/ %cc#%te)/

Fi*#e 215B O#t&o*o!%) ctti!*?

8/20/2019 MT 2, unit 1

29/60

MECH - KITE

C&i' T&ic,!e$$ R%tio

+&e#e r   chip thickness ratio> t o 

t&ic,!e$$ of t&e c&i' '#io# to c&i'fo#(%tio!> %!" t c   c&i' t&ic,!e$$ %fte#

$e'%#%tio!

C&i' t&ic,!e$$ %fte# ct %)+%/$ *#e%te# t&%!

befo#e. $o c&i' #%tio %)+%/$ )e$$ t&%! 15

c 

o

t t r   =

8/20/2019 MT 2, unit 1

30/60

MECH - KITE

@ete#(i!i!* S&e%# )%!e A!*)e

3%$e" o! t&e *eo(et#ic '%#%(ete#$ of t&eo#t&o*o!%) (o"e). t&e $&e%# ')%!e %!*)e φ  c%!be "ete#(i!e" %$?

+&e#e r   c&i' #%tio. %!" α   #%,e %!*)e

α 

α 

φ  $i!

co$

t%! r 

r 

−= 1

8/20/2019 MT 2, unit 1

31/60

MECH - KITE

Fi*#e 215D S&e%# $t#%i! "#i!* c&i' fo#(%tio!?

8/20/2019 MT 2, unit 1

32/60

MECH - KITE

S&e%# St#%i!

S&e%# $t#%i! i! (%c&i!i!* c%! be co('te"f#o( t&e fo))o+i!* e0%tio!. b%$e" o! t&e'#ece"i!* '%#%))e) ')%te (o"e)?

γ    t%!

8/20/2019 MT 2, unit 1

33/60

SESSION :

MECH - KITE

8/20/2019 MT 2, unit 1

34/60

MECH - KITE

Fi*#e 215 Mo#e #e%)i$tic vie+ of c&i' fo#(%tio!. $&o+i!* $&e%#

o!e #%t&e# t&%! $&e%# ')%!e5 A)$o $&o+! i$ t&e $eco!"%#/ $&e%#

o!e #e$)ti!* f#o( too) c&i' f#ictio!5‑

C&i' Fo#(%tio!

8/20/2019 MT 2, unit 1

35/60

MECH - KITE

Fo# 3%$ic T/'e$ of C&i' i! M%c&i!i!*

15 @i$co!ti!o$ c&i'25 Co!ti!o$ c&i'

85 Co!ti!o$ c&i' +it& 3i)t-' E"*e

8/20/2019 MT 2, unit 1

36/60

MECH - KITE

3#itt)e +o#, (%te#i%)$ Lo+ ctti!* $'ee"$

L%#*e fee" %!" "e't&

of ct

Hi*& too) c&i' f#ictio!‑

Fi*#e 215 Fo# t/'e$ of

c&i' fo#(%tio! i! (et%)ctti!*?

8/20/2019 MT 2, unit 1

37/60

8/20/2019 MT 2, unit 1

38/60

MECH - KITE

@cti)e (%te#i%)$ Lo+ to (e"i( ctti!*‑ ‑

$'ee"$

Too)-c&i' f#ictio!

c%$e$ 'o#tio!$ of c&i'to %"&e#e to #%,e f%ce

3UE fo#($. t&e!

b#e%,$ off. c/c)ic%))/

Fi*#e 215

8/20/2019 MT 2, unit 1

39/60

MECH - KITE

Se(ico!ti!o$ -$%+-toot&

%''e%#%!ce

C/c)ic%) c&i' fo#($

+it& %)te#!%ti!* &i*&$&e%# $t#%i! t&e! )o+

$&e%# $t#%i!

 A$$oci%te" +it&

"iffic)t-to-(%c&i!e

(et%)$ %t &i*& ctti!*

$'ee"$

Se##%te" C&i'

Fi*#e 215

8/20/2019 MT 2, unit 1

40/60

MECH - KITE

F#ictio! fo#ce F  %!" No#(%) fo#ce to f#ictio! N   S&e%# fo#ce F s %!" No#(%) fo#ce to $&e%# F n 

Fi*#e 2151 Fo#ce$ i!

(et%) ctti!*?

8/20/2019 MT 2, unit 1

41/60

MECH - KITE

Re$)t%!t Fo#ce$

Vecto# %""itio! of F  %!" N   #e$)t%!t R  Vecto# %""itio! of F s %!" F n  #e$)t%!t R 

 Fo#ce$ %cti!* o! t&e c&i' ($t be i! b%)%!ce?

R  ($t be e0%) i! (%*!it"e to R  

R’  ($t be o''o$ite i! "i#ectio! to R 

R’  ($t be co))i!e%# +it& R  

8/20/2019 MT 2, unit 1

42/60

MECH - KITE

Coefficie!t of F#ictio!

Coefficie!t of f#ictio! bet+ee! too) %!" c&i'?

F#ictio! %!*)e #e)%te" to coefficie!t of f#ictio!%$ fo))o+$?

N 

F = µ 

β  µ    t%!=

8/20/2019 MT 2, unit 1

43/60

MECH - KITE

S&e%# St#e$$

S&e%# $t#e$$ %cti!* %)o!* t&e $&e%# ')%!e?

φ $i!

w t  A os =

+&e#e As  %#e% of t&e $&e%# ')%!e

S&e%# $t#e$$ $&e%# $t#e!*t& of +o#, (%te#i%)"#i!* ctti!*

s

s

 A

F S =

8/20/2019 MT 2, unit 1

44/60

MECH - KITE

F . N . F s. %!" F n c%!!ot be "i#ect)/ (e%$#e" Fo#ce$ %cti!* o! t&e too) t&%t c%! be (e%$#e"?

Ctti!* fo#ce F c  %!" T$t fo#ce F t  

Fi*#e 2151 Fo#ce$

i! (et%) ctti!*?

8/20/2019 MT 2, unit 1

45/60

SESSION B

MECH - KITE

8/20/2019 MT 2, unit 1

46/60

MECH - KITE

Fo#ce$ i! Met%) Ctti!*

E0%tio!$ c%! be "e#ive" to #e)%te t&e fo#ce$t&%t c%!!ot be (e%$#e" to t&e fo#ce$ t&%t c%!

be (e%$#e"?

F = F c  sinα   + F t  cosα 

N = F c  cosα   F ‑

  t  sinα  

F s = F c  cosφ   F ‑   t  sinφ 

F n = F c  sinφ  + F t  cosφ 

3%$e" o! t&e$e c%)c)%te" fo#ce. $&e%# $t#e$$%!" coefficie!t of f#ictio! c%! be "ete#(i!e"

8/20/2019 MT 2, unit 1

47/60

MECH - KITE

T&e Me#c&%!t E0%tio!

Of %)) t&e 'o$$ib)e %!*)e$ %t +&ic& $&e%#"efo#(%tio! c%! occ#. t&e +o#, (%te#i%) +i))

$e)ect % $&e%# ')%!e %!*)e φ  t&%t (i!i(ie$e!e#*/. *ive! b/

@e#ive" b/ E*e!e Me#c&%!t

3%$e" o! o#t&o*o!%) ctti!*. bt v%)i"it/

e;te!"$ to 8-@ (%c&i!i!*

2245   β α φ    −+=

8/20/2019 MT 2, unit 1

48/60

8/20/2019 MT 2, unit 1

49/60

MECH - KITE

Hi*&e# $&e%# ')%!e %!*)e (e%!$ $(%))e# $&e%#')%!e +&ic& (e%!$ )o+e# $&e%# fo#ce. ctti!*

fo#ce$. 'o+e#. %!" te('e#%t#e

Fi*#e 21512 Effect of $&e%# ')%!e %!*)e φ  ?

8/20/2019 MT 2, unit 1

50/60

MECH - KITE

o+e# %!" E!e#*/ Re)%tio!$&i'$ 

 A (%c&i!i!* o'e#%tio! #e0i#e$ 'o+e#  T&e 'o+e# to 'e#fo#( (%c&i!i!* c%! be

co('te" f#o(?

P c   F c  v  

+&e#e P c   ctti!* 'o+e#> F c   ctti!* fo#ce>

%!" v   ctti!* $'ee"

8/20/2019 MT 2, unit 1

51/60

MECH - KITE

o+e# %!" E!e#*/ Re)%tio!$&i'$ 

I! U5S5 c$to(%#/ !it$. 'o+e# i$ t#%"itio!%)e;'#e$$e" %$ &o#$e'o+e#

8/20/2019 MT 2, unit 1

52/60

MECH - KITE

o+e# %!" E!e#*/ Re)%tio!$&i'$ 

G#o$$ 'o+e# to o'e#%te t&e (%c&i!e too) P g  o#HP g  i$ *ive! b/

o# 

  +&e#e E   (ec&%!ic%) efficie!c/ of (%c&i!e too)

  T/'ic%) E  fo# (%c&i!e too)$ ∼ J

E 

P P  c g  =

E 

HP HP  c g  =

8/20/2019 MT 2, unit 1

53/60

MECH - KITE

U!it o+e# i! M%c&i!i!*

U$ef) to co!ve#t 'o+e# i!to 'o+e# 'e# !itvo)(e #%te of (et%) ct

C%))e" unit power . P u o# unit horsepower . HP u

o# 

+&e#e R MR   (%te#i%) #e(ov%) #%te

MR 

c   R 

P P   =MR 

c u R 

HP HP   =

8/20/2019 MT 2, unit 1

54/60

MECH - KITE

S'ecific E!e#*/ i! M%c&i!i!*

U!it 'o+e# i$ %)$o ,!o+! %$ t&e specific  energ!  

 

U!it$ fo# $'ecific e!e#*/ %#e t/'ic%))/

N (((‑ 8 o# ((8 

8/20/2019 MT 2, unit 1

55/60

SESSION D

MECH - KITE

8/20/2019 MT 2, unit 1

56/60

MECH - KITE

Ctti!* too) (%te#i%)$

15 )%i! c%#bo! $tee)$25 Me"i( %))o/ $tee)$

85 Hi*& $'ee" $tee)$

8/20/2019 MT 2, unit 1

57/60

MECH - KITE

Ctti!* Te('e#%t#e

 A''#o;i(%te)/ J of t&e e!e#*/ i! (%c&i!i!*i$ co!ve#te" i!to &e%t

T&i$ c%! c%$e te('e#%t#e$ to be ve#/ &i*& %t

t&e too) c&i'‑

T&e #e(%i!i!* e!e#*/

8/20/2019 MT 2, unit 1

58/60

MECH - KITE

Ctti!* Te('e#%t#e$ %#e I('o#t%!t

Hi*& ctti!* te('e#%t#e$15 Re"ce too) )ife

25 #o"ce &ot c&i'$ t&%t 'o$e $%fet/ &%%#"$ to

t&e (%c&i!e o'e#%to# 

85 C%! c%$e i!%cc#%cie$ i! '%#t "i(e!$io!$"e to t&e#(%) e;'%!$io! of +o#, (%te#i%)

8/20/2019 MT 2, unit 1

59/60

MECH - KITE

Ctti!* Te('e#%t#e

 A!%)/tic%) (et&o" "e#ive" b/ N%t&%! Coo,f#o( "i(e!$io!%) %!%)/$i$ $i!*

e;'e#i(e!t%) "%t% fo# v%#io$ +o#, (%te#i%)$

+&e#e "   te('e#%t#e #i$e %t too) c&i'‑

i!te#f%ce>    $'ecific e!e#*/> v   ctti!*

$'ee"> t o  c&i' t&ic,!e$$ befo#e ct>  ρ #  vo)(et#ic $'ecific &e%t of +o#, (%te#i%)> $

t&e#(%) "iff$ivit/ of +o#, (%te#i%)

333040

55

   

  

= $ vt 

# 

 " 

o

 ρ 

8/20/2019 MT 2, unit 1

60/60

Ctti!* Te('e#%t#e

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too% chip ther&ocoup%e‑  

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fo#(?

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