thuyet minh

N MN HC CNG NGH C KH

GVHD : L VNH HIU

CHNG 1 :

XC NH DNG SN XUTSn lng chi tit cn ch to : S lng chi tit cn ch to trong mt nm tnh theo cng thc :N = N 0 .m. ( 1 + 100 ) . ( 1 + 100 )

Trong M = 1 : s lng chi tit nh nhau trong mt n v sn phm =10 - 20% : s % chi tit dng lm ph tng , chon a =10% = 5 - 7% : s % chi tit ph phm trong qu trnh ch to , chn = 5% N 0 = 300000 l sn lng trong mt nm theo k hoch Ta cN = 300000.1. ( 1 + 10 100 ) . ( 1 + 5 100 ) = 346500 (chic/nm)

1. Tnh khi lng chi tit :

Chn kch thc phi s b : Chiu di a = 145 mm Chiu rng b = 30 mm Chiu cao h = 20 mm

Vh = a.b.c = 145.30.20 = 87000

thp = 7,85g / cm3 mh = vh .th p = 87000x 7.85= 682950 0.68kg =Vy khi lng ca hnh hp ch nht l 0,68 kg

;

0,7 kg

2. Bng xc nh dng sn xut : Q1 trng lng ca chi tit Dng sn xut >200kg 4:200kg < 4kg Sn lng hng nm ca chi tit ( chic ) n chic 50000

Vi sn lng 300000 chic /nm v c khi lng =0,7 kg nn dng sn xut l hng khi. c trng dng sn xut ny th ta s dng my vn chuyn dng, my vn nng, trang b cng ngh chuyn dng ( g chuyn dng) mi em li hiu qu kinh t k thut vi s lng ln.

SVTH : L HONG LI

Trang 2


GVHD : L VNH HIU

CHNG 2 :

PHN TCH CHI TIT GIA CNGCng dng ca chi tit Bnh ai dng truyn ng gia 2 trc bng ai vi khong cch khng qu ln. y , vi kt cu chi tit co rnh lp ai c dng hnh thang nn dy ai kh b trt ra khi rnh ai, Chi tit thng c dng trong cc thit b nhm bo v qu ti v pht ra ting n nh, d thay th v t hiu qu kinh t cao. Cc yu cu k thut m bo ng tm kch thc lp trc 20 v lp ai 126 1,Tn gi chi tit : Bnh ai . 2,Cc kch thc ca chi tit : Chiu di : la =140 mm. Chiu rng : lb = 25 mm. Chiu cao : lh = 16 mm.

Gia chi tit l 1 l ren M14 2 u chi tit c 2 rnh, chiu di mi rnh l l = 32mm v c rng l 12mm,ti v tr mi rnh c 1 l,1 mp c l rng 8,5mm v mp i din c l M8, 2 l song song v vung gc nhau, v mi l cch mt u chi tit l 16mm(tnh tm l) Dung sai ca 2 u rnh l +0,1. Dung sai khong cch chiu di gia 2 rnh l -0,1

SVTH : L HONG LI

Trang 3


GVHD : L VNH HIU

CHNG 3 : CHN PHI V PHNG PHP CH TO PHI.Chn phng php ch to phi bng phng php c(c trong khun ct) v phng php ny thng dng v d ch to . 1, u v nhc im : u im : c c tt c cc kim loi v hp kim khac nhau,c c cc kch thc ln nh khc nhau,to ra c cc hnh dng m cc phng php khc khng to ra c(l,hc rng ,). Nhc im : To ra khuyt tt nh r kh , r x,khng y lng khun,bi nt, 2, Cc qu trnh c trong khun cc : Bc 1 : chun b vt liu lm khun : mu lm bng g hoc nhn c hnh dng v kch thc nh chi tit cn c.

Khng nn c rnh trc v phi khoan l. Bc 2 : Tin hnh lm khun : lm khun phi dng mu , ct v t st . Qui trnh : t mu vo trong v chn ct, kh,tho khun , ly vt mu ra. Bc 3 : chun b vt liu nu gm : thp than ,cht tr dung (thng l vi) Bc 4 : nu chy kim loi v rt kim loi lng vo khun.

Rt kim loi lng vo khun.SVTH : L HONG LI Trang 4


GVHD : L VNH HIU

Sn phm sau khi c.

SVTH : L HONG LI

Trang 5


GVHD : L VNH HIU

CHNG 4 : CHN TIN TRNH GIA CNG

E

F

B

I, Gia cng bao hnh : m bo song song v vung gc gia cc cnh ta nn gia cng theo th t . 1, Mt A trc :

C

A

2, Mt C :

C3, Mt D :SVTH : L HONG LI Trang 6


GVHD : L VNH HIU

D

4, Mt B :

B

SVTH : L HONG LI

Trang 7


GVHD : L VNH HIU

5, Mt E :

E

6, Mt F :

F

SVTH : L HONG LI

Trang 8


GVHD : L VNH HIU

II,Gia cng l v rnh : 1, Khoan l gia :

2, Khoan 2 l 2 bn cnh :

3, Gia cng 2 rnh 2 bn cnh :

SVTH : L HONG LI

Trang 9


GVHD : L VNH HIU

4, Sau khi gia cng rnh xong ta khoan li 2 l trn 1 mp mt D t kch thc yu cu .

4, Taro l M14 trn mt A . 5, Taro l M8 trn mt C .

SVTH : L HONG LI

Trang 10


GVHD : L VNH HIU

CHNG 5 :

THIT K NGUYN CNG1, Phng n 1 : Nguyn cng 1 : Lm sch ba via , u rt , u ngt Nguyn cng 2 : ct dy c 2 ln g : - Ln g 1 : ct l gia v 2 rnh . - Ln g 2 : ct bao hnh v 2 l 6,5 mm Nguyn cng 3 : S dng my khoan c khoan rng 2 l 8,5 mm Nguyn cng 4 : Taro 2 l M8 trn my khoan c chc nng taro. Nguyn cng 6 : Taro l gia M14. Nguyn cng 7 : Tng kim tra . 2, Phng n 2 : Nguyn cng 1 : Lm sch ba via , u rt , u ngt Nguyn cng 2 : Vt mt cnh A trn my tin 4 chu . Nguyn cng 3 : Vt mt cnh B trn my tin 4 chu . Nguyn cng 4 : Vt mt cnh C trn my tin 4 chu . Nguyn cng 5 : Vt mt cnh B trn my tin 4 chu . Nguyn cng 6 : Vt mt cnh E trn my tin 4 chu . Nguyn cng 7 : Vt mt cnh F trn my tin 4 chu . Nguyn cng 8 : Khoan l gia . Nguyn cng 9 : Khoan 2 l bn cnh C . Nguyn cng 10 : Ct 2 rnh . Nguyn cng 11 : Khoan rng 2 l bn cnh D 8,5 mm . Nguyn cng 12 : Taro 2 l M8 . Nguyn cng 13 : Taro l gia M14 . Nguyn cng 14 : Tng kim tra .

SVTH : L HONG LI

Trang 11


GVHD : L VNH HIU

3, Phng n 3 : Phng n ti u. Nguyn cng 1 : Lm sch ba via , u rt , u ngt Nguyn cng 2 : - Ni dung gia cng cnh A . - nh v 5 bc . - 1 bc . - Trn my phay 6H82 . - Dao phay mt u c gn hp kim T5K10 . - g t .

S

w

w

S nguyn l nguyn cng 2.

SVTH : L HONG LI

Trang 12


GVHD : L VNH HIU

Nguyn cng 3: - Ni dung gia cng cnh C . - nh v 5 bc . - 1 bc . - Trn my phay 6H82 . - Dao phay mt u c gn hp kim T5K10 . - g t .S

S nguyn l nguyn cng 3. Nguyn cng 4: - Ni dung gia cng cnh D . - nh v 5 bc . - 1 bc . - Trn my phay 6H82 . - Dao phay mt u c gn hp kim T5K10 . - g t .S


SVTH : L HONG LI

Trang 13


GVHD : L VNH HIU

Nguyn cng 5: - Ni dung gia cng cnh B . - nh v 5 bc . - 1 bc . - Trn my phay 6H82 . - Dao phay mt u c gn hp kim T5K10 . - g t .n S

w

w


SVTH : L HONG LI

Trang 14


GVHD : L VNH HIU

Nguyn cng 6 : Cch 1 : - Ni dung gia cng cnh E . - nh v 5 bc . - 1 bc . - Trn my phay 6H82 . - Dao phay mt u c gn hp kim T5K10 . - g t .n S

w

S nguyn l nguyn cng 6 cch 1.

SVTH : L HONG LI

Trang 15


GVHD : L VNH HIU

Nguyn cng 7 : Cch 1 : - Ni dung gia cng cnh F . - nh v 5 bc . - 1 bc . - Trn my phay 6H82 . - Dao phay mt u c gn hp kim T5K10 . - g t .n S

w


SVTH : L HONG LI

Trang 16


GVHD : L VNH HIU

Nguyn cng 6 : Cch 2 : Ni dung gia cng cnh E . - nh v 5 bc . - 1 bc . - Trn my phay 6H82 . - Dao phay ngn . - g t .

n

S w w


SVTH : L HONG LI

Trang 17


GVHD : L VNH HIU

Nguyn cng 7 : Cch 2 : Ni dung gia cng cnh F . - nh v 5 bc . - 1 bc . - Trn my phay 6H82 . - Dao phay ngn . - g t .

n

S w w


SVTH : L HONG LI

Trang 18


GVHD : L VNH HIU

Nguyn cng 8 : - Ni dung khoan l gia 12 . - nh v 5 bc . - 1 bc . - Trn my khoan 2A150 . - Dao mi khoan rut g . - g t .

S

wS nguyn l nguyn cng 8.

w

SVTH : L HONG LI

Trang 19


GVHD : L VNH HIU

Nguyn cng 9 : - Ni dung khoan cng lc 2 l cnh C 6,5 . - nh v 5 bc . - 1 bc . - Trn my khoan chuyn dng 2 trc . - Dao mi khoan rut g . - g chuyn dng .n S n S


w

SVTH : L HONG LI

Trang 20


GVHD : L VNH HIU

Nguyn cng 10 : - Ni dung ct rnh bn cnh E . - nh v 5 bc . - 1 bc . - Trn my phay 6H82 . - Dao phay ngn , a . - g t .

S


SVTH : L HONG LI

Trang 21


GVHD : L VNH HIU

Nguyn cng 11 : - Ni dung ct rnh bn cnh F . - nh v 5 bc . - 1 bc . - Trn my phay 6H82 . - Dao phay ngn , a . - g t .

n S


w

SVTH : L HONG LI

Trang 22


GVHD : L VNH HIU

Nguyn cng 12 : - Ni dung khot rng l trn cnh D 8,5 . - nh v 6 bc . - 1 bc . - Trn my khoan chuyn dng. - Dao mi khoan rut g . - g chuyn dng .n S n S

wNguyn cng 13 : - Ni dung taro l gia M14 . - nh v 5 bc . - 1 bc . - Trn my khoan c chc nng taro. - Dao 2 mi taro M14 . - g t . Nguyn cng 14 : - Ni dung taro 2 l bn cnh C M8. - nh v 5 bc . - 2 bc . - Trn my khoan c chc nng taro. - Dao 2 mi taro M8 . - g t. Nguyn cng 15 : Tng kim tra . 4, Phng n 4 :SVTH : L HONG LI

w

Trang 23


GVHD : L VNH HIU

Nguyn cng 1 : Lm sch ba via , u rt , u ngt Nguyn cng 2 : Vt mt cnh A trn my bo . Nguyn cng 3 : Vt mt cnh B trn my bo . Nguyn cng 4 : Vt mt cnh C trn my bo . Nguyn cng 5 : Vt mt cnh B trn my bo . Nguyn cng 6 : Vt mt cnh E trn my bo . Nguyn cng 7 : Vt mt cnh F trn my bo . Nguyn cng 8 : Khoan l gia . Nguyn cng 9 : Khoan 2 l bn cnh C . Nguyn cng 10 : Ct 2 rnh trn cnh A . Nguyn cng 11 : Khoan rng 2 l bn cnh D 8,5 mm . Nguyn cng 12 : Taro 2 l M8 cnh C. Nguyn cng 13 : Taro l gia M14 . Nguyn cng 14 : Tng kim tra .

SVTH : L HONG LI

Trang 24


GVHD : L VNH HIU

CHNG 6 : XC NH LNG D V CC KCH THC1, Xc nh cp chnh xc ca phi : Do phi c c trong khun ct nn phi c t cp chnh xc II. 2, Xc nh v tr ca b mt gia cng : Mt phng : mt trn v mt y ; l v rnh . 3, Xc nh kch thc chon ch ln nht ca chi tit gia cng l : 140x25x16. 4, Xc nh lng d bng phng php tra bng : Vi phi c cp chnh xc II ta c : Lng d ca mt phng : Lng d ca mt D : tra bng 3-95 sch cng ngh ch to my, ta c : a = 5mm. Lng d ca mt A,B, E, F khi c l mt bn , tra bng (3-95) sch cng ngh ch to my , ta c : a A = aB = aE = a F = 2,5mm . Lng d ca mt C khi c l mt y , tra bng (3-95) sch cng ngh ch to my , ta c : a = 4 mm. 5, Xc nh kch thc phi : Chiu di l = 140 + 2,5 + 2,5 =145 mm Chiu rng b = 25 + 5 + 4 = 34 mm Chiu cao h = 16 +2,5 +2,5 = 21 mm

SVTH : L HONG LI

Trang 25


GVHD : L VNH HIU

CHNG 7 : XC NH CH CT V THI GIAN GIA CNG C BNI,Ch ct : 1,Trn my khoan 2A150 , ch ct ca l khoan gia chn mi khoan p18,thp c45, chn

b = 50kg/ mm 2

Vi M14 th chn mi khoan 12(14.(0.8-0.85)). Chiu su ct : t = D/2 = 12/2 = 6mm Bc tin : Theo sc bn ca mi khoan c cng thc :

D 0.81 s = 3,88. 0.94 b Theo iu kin ban u : D = 12,

b = 50, thay vo ta c :

120.81 s = 3,88. 0.94 = 0, 734 . 50Theo thuyt minh my ta chn s = 0,7 mm/s Tnh vn tc :

Cv .D zv V = m xv yv .K v T .t .STheo bng (3-3) sch ch ct (thy N.N.o,T.T.Sang,H.V.Bnh ),ta c: CV = 9,8 ; ZV =0,4 ; YV =0,5 ; m = 0,2; X v =0

Bng (4-3) : T = 45 (5-3) : K mv =1,16 (6-3) : Kiv = 1 (7-1) : K nv = 1 (8-1) : Kuv = 1 Do : K v = K mv . K nv . Kuv . Kiv = 1,16.1.1.1 = 1,16 Thay vo , ta c :

9,8.120,4 V = 0,2 0 0,5 .1,16 = 17,14 45 .6 .7S vng quay trc chnh :

n=

1000.v 1000.17,14 = = 455 D 3,14.12Trang 26

SVTH : L HONG LI


GVHD : L VNH HIU

Theo thuyt minh my, ta chn n = 351v/ph Lc ct v momen xon :

P0 = C P .D ZP .S YP .K MPTheo bng (7-3) sch ch ct (thy N.N.o,T.T.Sang,H.V.Bnh ),ta c: CP =68 ; Z P =10 ; YP =0,7 Theo bng (12-1) v (13-1) , ta c :

K mP = K MP

50 = 75

0,75

; 0, 74

Thay vo cng thc :

P0 = 68.121.0, 7 0,7.0, 74 = 470kgSo vi |Po| = 2500 kg ca my ta thy bc tin chn , my lm vic an ton. Momen xon :

M = C M .D ZM .S YM .K M M = 0, 034.12 2,5.0, 7 0,7.0, 74 = 9, 78 ( kgm )

Theo bng (7-3) : CM = 0,034 ; Z M = 2,5 ; YM = 0,7 Thay vo ta c : Cng sut ct gt :

N=

M n 9, 78.351 = = 3,52 ( kw ) 975 975

So vi cng sut my N = 8,5 kw , m bo an ton khi my lm vic . 2,Ch ct ca 2 l khoan 2 bn u 6,5(ta c ng knh l 8 nn chn 6,5) Chn mi khoan p18 trn my khoan 2A150 thp c45 v b = 50(kg/ mm 2 ) Chiu su ct : t = D/2 = 6,5/2 = 3,25 mm Bc tin : theo sc bn ca mi khoan c cng thc :

D 0,81 S = 3,88. 0,94 bTheo iu kin ban u D = 6,5 ; b = 50

6,50,81 S = 3,88. 0,94 = 0, 45mm 50Theo thuyt minh my chn s = 0,4 Tnh vn tc :

Cv .D zv V = m xv yv .K v T .t .SSVTH : L HONG LI Trang 27


GVHD : L VNH HIU

Theo bng (3-3) sch ch ct (thy N.N.o,T.T.Sang,H.V.Bnh ),ta c: CV = 9,8 ; ZV =0,4 ; YV =0,5 ; m = 0,2; X v =0

Bng (4-3) : T = 25 (5-3) : K mv =1,16 (6-3) : Kiv = 1 (7-1) : K nv = 1 (8-1) : Kuv = 1 Do : K v = K mv . K nv . Kuv . Kiv = 1,16.1.1.1 = 1,16 Thay vo , ta c :

9,8.6, 50,4 V = 0,2 .1,16 = 19,96 0 0,5 25 .3, 25 .0, 4S vng quay trc chnh :

1000.v 1000.19,96 n= = = 978 D 3,14.6, 5Theo thuyt minh my, ta chn n = 950v/ph Lc ct v momen xon :

P0 = C P .D ZP .S YP .K MPTheo bng (7-3) sch ch ct (thy N.N.o,T.T.Sang,H.V.Bnh ),ta c: CP =68 ; Z P =1 ; YP =0,7 Theo bng (12-1) v (13-1) , ta c :

K mP = K MP

50 = 75

0,75

; 0, 74

Thay vo cng thc :

P0 = 68.6,51.0, 4 0,7.0, 74 = 172kgSo vi |Po| = 2500 kg ca my ta thy bc tin chn , my lm vic an ton. Momen xon :

M = C M .D Z M .S YM .K M M = 0, 034.6,5 2,5.0, 4 0,7.0, 74 = 1, 43 ( kgm )

Theo bng (7-3) : CM = 0,034 ; Z M = 2,5 ; YM = 0,7 Thay vo ta c : Cng sut ct gt :

N=

M n 1, 43.950 = = 1,39 ( kw ) 975 975

So vi cng sut my N = 8,5 kw , m bo an ton khi my lm vic . 3,Khot 2 l bn cnh D :SVTH : L HONG LI Trang 28


GVHD : L VNH HIU

Khot l D= 8,5 t l khoan sn d = 6,5 . Chn T = 50 , b = 50 , z = 4 , thp c45 , mi khoan p18 trn my k125A. Ch ct khi khot : t = (D-d)/2 = (8,5-6,5)/2 = 1 . Chn S theo cng thc bn dao :

S = CS D 0,6 (mm/v)Theo bng (1-3) sch ch ct (thy N.N.o,T.T.Sang,H.V.Bnh ),ta c: Chn CS = 0,095, thay vo ta c :

S = 0, 095.8,5 0,6 = 0,34mm / vTheo my chn S = 0,3 mm/v Tnh vn tc khi khot :

Cv .D zv V = m xv yv .K v T .t .STheo bng (3-3) sch ch ct (thy N.N.o,T.T.Sang,H.V.Bnh ),ta c: CV = 16,3 ; ZV =0,3 ; YV =0,5 ; m = 0,3; X v =0,2

(5-3) : K mv =1,16 (6-3) : Kiv = 1 (7-1) : K nv = 1 (8-1) : Kuv = 1 Do : K v = K mv . K nv . Kuv . Kiv = 1,16.1.1.1 = 1,16 Thay vo , ta c :

16,3.8,50,3 V = 0,3 0,2 .1,16 = 20m / ph 0,5 50 .1 .0,3S vng quay trc chnh :

1000.v 1000.20 n= = = 749 v / ph D 3,14.8,5Theo thuyt minh my, ta chn n = 700v/ph Momen khi khot :

CP .t XP S YP .K P .D.Z M= 2.1000Theo bng (11-1) sch ch ct (thy N.N.o,T.T.Sang,H.V.Bnh ),ta c: CP =200 ; Z P =1 ; YP =1 Theo bng (12-1) v (13-1) , ta c :SVTH : L HONG LI Trang 29


GVHD : L VNH HIU

K mP = K MP

50 = 75

0,75

; 0, 74

Theo bng (15-1) , ta c KCP = 0,981 , K = 1. Ta c K P = 0,74.0,981.1 = 0,73. Thay vo cng thc :

200.11.0,31.0, 73.8,5.4 M= = 0, 7kgm 2.1000Cng sut ct gt :

N=

M n 0, 7.700 = = 0,5 ( kw ) 975 975

So vi cng sut my N = 8,5 kw , m bo an ton khi my lm vic . 4,Ch ct khi phay mt phng : gia cng mt A,B Trn my phay 6H82 phay b mt rng 30mm, di 145mm, lng d 2,5mm, thp c45 c b = 50kg/ mm 2 , dao phay mt u gn hp kim cng T5K10, mn ca dao cho php h = 1, D = 60 mm, z = 8, y = 5, =15, = 150 , T = T0 , = 600 , 1 = 50 .H thng cng ngh cng vng cao. Chn t = h = 2,5 mm Lng chy dao : Theo bng (6-5) sch ch ct (thy N.N.o,T.T.Sang,H.V.Bnh ),ta c: S = (0,15 0,18) mm/s Chn S = 0,15 mm/s Tnh vn tc ct :

Cv .D qv V = m xv yv uv pv .K v ( m / ph ) T .t .S z .B .ZTheo bng (1-5) sch ch ct (thy N.N.o,T.T.Sang,H.V.Bnh ),ta c: CV = 332 ; qV =0,2 ; YV =0,4 ; m = 0,2; X v =0,1; uv =0,2; pv = 0

(2-5) : T = 120 (2-1) : K mv =7,5/ b =1,5 (7-1) : K nv = 0,8 (8-1) : Kuv = 1,4 Do : K v = K mv . K nv . Kuv = 1,5.0,8.1,4 = 1,68 Thay vo , ta c :

332.600,2 V= .1, 68 = 490m / ph 0,2 0,1 0,4 0,2 0 120 .2 .0,15 .30 .8SVTH : L HONG LI Trang 30


GVHD : L VNH HIU

S vng quay trong 1 pht ca dao :

n=

1000.v 1000.490 = = 2600 v / ph D 3,14.60 Dn 3,14.60.2500 = = 471m / ph 1000 1000

Theo thuyt minh my, ta chn n = 2500v/ph,lc ny tc ct thc t l :

VT =

Tnh lng chy dao pht v lng chy dao rng thc t theo my :

S M = S Z . z.n = 0,15.0,8.2500 = 3000 m / ph2900 = 0,145mm / s 8.2500

Theo my chn S M =2900mm/ph

S Zthuc =

Lc ct PZ tnh theo cng thc :

CP .t XP S Z YP .BVP .Z PZ = .K p qp wp D .nTheo bng (3-5) sch ch ct (thy N.N.o,T.T.Sang,H.V.Bnh ),ta c: C p = 825 ; x p =1 ; Yp =0,75 ; u p =1,1; wp =0,2; q p = 1,3 Theo bng (12-1) , ta c :0,3

K P = K MP

50 = 75

; 0,89

Thay vo cng thc :

825.21.0,1450,75.301,1.8 PZ = .0,89= 119kg 1,3 0,2 60 .2500ng sut ct :

C

PZ .V 119.471 N= = = 9, 2kW 60.102 60.102So vi cng sut my N = 10 kw , m bo an ton khi my lm vic Momen xon trn trc chnh :

M=

Pz .D 119.60 = = 3,57 ( kgm ) 2.1000 2000Trang 31

5, Ch ct khi phay mt phng : gia cng mt C,DSVTH : L HONG LI


GVHD : L VNH HIU

Trn my phay 6H82 phay b mt rng 20mm, di 145mm, lng d 4,5mm, thp c45 c b = 50kg/ mm 2 , dao phay mt u gn hp kim cng T5K10, mn ca dao cho php h = 1, D = 60 mm, z = 8, y = 5, =15, = 150 , T = T0 , = 600 , 1 = 50 .H thng cng ngh cng vng cao. Chn t = h = 2 mm Lng chy dao : Theo bng (6-5) sch ch ct (thy N.N.o,T.T.Sang,H.V.Bnh ),ta c: S = (0,15 0,18) mm/s Chn S = 0,15 mm/s Tnh vn tc ct :

Cv .D qv V = m xv yv uv pv .K v ( m / ph ) T .t .S z .B .ZTheo bng (1-5) sch ch ct (thy N.N.o,T.T.Sang,H.V.Bnh ),ta c: CV = 332 ; qV =0,2 ; YV =0,4 ; m = 0,2; X v =0,1; uv =0,2; pv = 0


332.600,2 V= .1, 68 = 531m / ph 0,2 0,1 0,4 0,2 0 120 .2 .0,15 .20 .8S vng quay trong 1 pht ca dao :

1000.v 1000.531 n= = = 2821 v / ph D 3,14.60Theo thuyt minh my, ta chn n = 2700v/ph,lc ny tc ct thc t l :

VT =

Dn 3,14.60.2700 = = 508m / ph 1000 1000


S M = S Z . z.n = 0,15.0,8.2700 = 3240 m / ph3000 = 0,14mm / s 8.2700


S Zthuc =


SVTH : L HONG LI

Trang 32


GVHD : L VNH HIU


K P = K MP

50 = 75

; 0,89

Thay vo cng thc :

825.21.0,1450,75.201,1.8 PZ = .0,89= 73kg 1,3 0,2 60 .2700g sut ct :

Cn

PZ .V 73.508 N= = = 6kW 60.102 60.102So vi cng sut my N = 10 kw , m bo an ton khi my lm vic Momen xon trn trc chnh :

M=

Pz .D 73.60 = = 2, 2 ( kgm ) 2.1000 2000

6, Ch ct khi phay mt phng : gia cng mt E,F Trn my phay 6H82 phay b mt rng 20mm, di 30mm, lng d 2,5mm, thp c45 c b = 50kg/ mm 2 , dao phay mt u gn hp kim cng T5K10, mn ca dao cho php h = 1, D = 60 mm, z = 8, y = 5, =15, = 150 , T = T0 , = 600 , 1 = 50 .H thng cng ngh cng vng cao. Chn t = h = 2,5 mm Lng chy dao : Theo bng (6-5) sch ch ct (thy N.N.o,T.T.Sang,H.V.Bnh ),ta c: S = (0,15 0,18) mm/s Chn S = 0,15 mm/s Tnh vn tc ct :

Cv .D qv V = m xv yv uv pv . Kv ( m / ph) T .t .S z .B .ZTheo bng (1-5) sch ch ct (thy N.N.o,T.T.Sang,H.V.Bnh ),ta c: CV = 332 ; qV =0,2 ; YV =0,4 ; m = 0,2; X v =0,1; uv =0,2; pv = 0SVTH : L HONG LI Trang 33


GVHD : L VNH HIU


332.600,2 V= .1, 68 = 479 m / ph 0,2 0,1 0,4 0,2 0 120 .2,5 .0,15 .30 .8S vng quay trong 1 pht ca dao :

n=

1000.v 1000.479 = = 2544 v / ph D 3,14.60 Dn 3,14.60.2500 = = 471m / ph 1000 1000


VT =


S M = S Z . z.n = 0,15.0,8.2500 = 3000 m / ph2800 = 0,14mm / s 8.2500


S Zthuc =



K P = K MP

50 = 75

; 0,89

Thay vo cng thc :

SVTH : L HONG LI

Trang 34


GVHD : L VNH HIU

825.2,51.0,14 0,75.201,1.8 PZ = .0,89= 92kg 1,3 0,2 60 .2500ng sut ct :

C

PZ .V 92.471 N= = = 7kW 60.102 60.102So vi cng sut my N = 10 kw , m bo an ton khi my lm vic Momen xon trn trc chnh :

M=

Pz .D 92.60 = = 2, 76 ( kgm ) 2.1000 2000

7, Ch ct ca 2 rnh : Trn my phay 6H82 phay rnh rng 12mm, di 32mm, lng d 20mm, thp c45 c b = 50kg/ mm2 , dao phay a T15K6, D = 12 mm, z = 16, y = 5, =15, = 150 , T = T0 .H thng cng ngh cng vng cao. Chn t = 3 mm Lng chy dao : Theo bng (6-5) sch ch ct (thy N.N.o,T.T.Sang,H.V.Bnh ),ta c: S = (0,12 0,15) mm/s Chn S = 0,12 mm/s Tnh vn tc ct :

Cv .D qv V = m xv yv uv pv . Kv ( m / ph) T .t .S z .B .ZTheo bng (1-5) sch ch ct (thy N.N.o,T.T.Sang,H.V.Bnh ),ta c: CV = 690 ; qV =0,2 ; YV =0,12 ; m = 0,35; X v =0,3; uv =0,1; pv = 0


690.1200,2 V= .2, 28 = 513 m / ph 0,35 0,3 0,12 0,1 0 150 .3 .0,12 .12 .16S vng quay trong 1 pht ca dao :

SVTH : L HONG LI

Trang 35


GVHD : L VNH HIU

n=

1000.v 1000.513 = =1361 v / ph D 3,14.120 Dn 3,14.60.2500 = = 471m / ph 1000 1000


VT =


S M = S Z . z.n = 0,12.16.1100 = 2112 m / ph2000 = 0,1mm / s 16.1100


S Zthuc =


CP .t XP S Z YP .BVP .Z PZ = .K p qp wp D .pTheo bng (3-5) sch ch ct (thy N.N.o,T.T.Sang,H.V.Bnh ),ta c: C p = 261 ; x p =0,9 ; Yp =0,8 ; u p =1,1; wp =0; q p = 1,1 Theo bng (12-1) , ta c :

K P = K MP

50 = 75

0,3

; 0,89

Thay vo cng thc :

261.30,9.0,10,8.121,1.16 PZ = .0,89= 141kg 1,1 0 120 .1300g sut ct :

Cn

PZ .V 141.414 N= = = 9, 6kW 60.102 60.102So vi cng sut my N = 10 kw , m bo an ton khi my lm vic Momen xon trn trc chnh :

M=

Pz .D 141.120 = = 8, 46 ( kgm ) 2.1000 2000Trang 36

II,Thi gian gia cng :SVTH : L HONG LI


GVHD : L VNH HIU

1,Thi gian khi khoan l gia chi tit : Theo sch ch ct (thy N.N.o,T.T.Sang,H.V.Bnh ),ta c cng thc chung :

T0 =

L + L1 + L2 .i ( ph ) S .n

- Khoan sut :

T0 =

L + L1 + L2 ( ph ) S .n

L = 16 mm

d 8,5 cot g + ( 0,5 2 ) = cot g 60 0+ 2 = 380 2 2 L2 =(2-3) , chn L2 =0 v khoan l tt. L1 =Thay vo ta c :

T0 =

16 + 380 + 0 = 1, 6 ph . 0, 7.351n Sl1

l

l2

2,Thi gian khi khoan 2l bn cnh : Theo sch ch ct (thy N.N.o,T.T.Sang,H.V.Bnh ),ta c cng thc chung :

T0 =

L + L1 + L2 .i ( ph ) S .n

- Khoan sut :

T0 =

L + L1 + L2 ( ph ) S .n

L = 16 mm

L1 =

d 6,5 cot g + ( 0,5 2 ) = cot g 60 0+ 1= 290 2 2Trang 37

SVTH : L HONG LI


GVHD : L VNH HIU

L2 =(2-3) , chn L2 =0 v khoan l tt.Thay vo ta c :

T0 =

16 + 290 + 0 = 0, 77 ph . 0, 4.1000

3,Thi gian khi khoan rng 2 l bn cnh :

Sl1

l

Theo sch ch ct (thy N.N.o,T.T.Sang,H.V.Bnh ),ta c cng thc chung :

T0 =

L + L1 + L2 .i ( ph ) S .n

- Khoan sut : -

T0 =

L + L1 + L2 ( ph ) S .n

L = 6 mm

d 8,5 6,5 cot g + ( 0,5 2 ) = cot g 60 0+ 1= 90 2 2 L2 =(1-3) , chn L2 =1 . L1 =

Thay vo ta c :

T0 =

6 + 90 + 1 = 0, 46 ph . 0,3.700 T0 = L + L1 + L2 .i ( ph ) S .n

4,Thi gian khi phay mt phng A,B : Theo sch ch ct (thy N.N.o,T.T.Sang,H.V.Bnh ),ta c cng thc chung :

SVTH : L HONG LI

Trang 38


GVHD : L VNH HIU

T0 =

L + L1 + L2 ( ph ) S .n

L = 145 mm

L1 = 0,5. D D 2 B 2 + ( 0,5 3 ) = 0,5. 60 60 2 30 2 + 3 = 7L2 =(1-6) , chn L2 =6 .Thay vo ta c :

(

(

)

)

T0 = T0 = T0 =

145 + 7 + 6 = 0, 42 ph . 0,15.2500 30 + 7 + 6 = 0,12 ph 0,15.2500

5, Thi gian phay mt phng E,F :

6, Thi gian phay mt phng C,D :

145 + 4, 7 + 6 = 0,38 ph 0,15.2700

SVTH : L HONG LI

Trang 39


GVHD : L VNH HIU

CHNG 8 :LP PHIU TNG HP NGUYN CNG TI U.Th t NC G Bc 1 Ni dung C Thit b hu n My Dao S nguyn l g Dng c o

2

1

1

Chun b phi,l m sch phi, mi bavia Gia B cng -3 cnh A D -2

6H82

Dao phay mt u c gn hp kim T5K10

t

Thc cp 1/50

n S

SVTH : L HONG LI

Trang 40


GVHD : L VNH HIU

3

1

1

Gia cng cnh C

D- 6H82 3 A2

4

1

1

Gia A- 6H82 cng 2 cnh D C3

5

1

1

Gia cng cnh B

A- 6H82 3 C2

Dao phay mt u c gn hp kim T5K10 Dao phay mt u c gn hp kim T5K10 Dao phay mt u c gn hp kim T5K10

t

Thc cp 1/50

S

t

Thc cp 1/50

S

t

Thc cp 1/50

n S

w

w

SVTH : L HONG LI

Trang 41


GVHD : L VNH HIU

6

1

1

Gia cng cnh E

F- 6H82 3 C2

Dao phay ngn

t

Thc cp 1/50

n

S w w

7

1

1

Gia cng cnh F

E- 6H82 3 C2

Dao phay ngn

t

Thc cp 1/50

n

S w w

8

1

1

Gia cng l gia 12

A- Khoan 3 2A150 C2

Mi khoan rut g

t

Thc cp 1/50

S

w

w

SVTH : L HONG LI

Trang 42


GVHD : L VNH HIU

9

1

1

10

1

1

Gia cng cng lc 2 l cnh C 6,5 Gia cng rnh bn cnh E Gia cng rnh bn cnh F Gia cng khot rng 2 l trn cnh D 8,5 Taro l gia

A3 D2

My Mi khoan khoan chuyn rut g dng 2 trc Dao phay ngn

Chuyn

dng

Thc cp 1/50w

n S

n S

w

A- My 3 phay C- 6H82 2 A- My 3 phay C- 6H82 2 A2 C3

t

Thc cp 1/50

S

11

1

1

Dao phay ngn

t

Thc cp 1/50

n S

w

wn S S

12

1

1

My Mi khoan khoan chuyn rut g dng 2 trc 2 mi taro M14

t

Thc cp 1/50w

n

w

13

1

1

B- My 3 khoan C- c

t

Thc cp 1/50Trang 43

SVTH : L HONG LI


GVHD : L VNH HIU

2 14 1 2 Taro 2 l trn cnh C

chc nng taro D- My 3 khoan A- c 2 chc nng taro

2 mi taro M14

t

Thc cp 1/50

15

Tng kim tra

SVTH : L HONG LI

Trang 44


GVHD : L VNH HIU

CHNG 9:TNH TOAN VA THIET KE O GA1,Thanh Phan Cua o Ga C cau nh v C cau nh v dung e xac nh v tr tng oi cua chi tiet so vi may hoac dung cu cat. C cau nay bao gom cac loai chot ty, phien ty. C cau kep chac co tac dung gi cho chi tiet khong b xe dch trong qua trnh gia cong. C cau kep chac bao gom c cau kep to hp do nhieu chi tiet thc hien nh ren oc, c cau kep lien ong. Than o ga va e o ga Than o ga va e o ga co ten goi la cac chi tiet c s. Cac chi tiet c s thng la cac e hnh vuong, ch nhat co ranh hoac co ren e cac chi tiet khac bat chat len no. Chi tiet c s la chi tiet goc e noi lien cac bo phan khac nhau thanh o ga. Cac chi tiet noi gep ay la cac bulong ai oc dung e noi cac bo phan cua o ga lai vi nhau. Thong thng cac chi tiet nay che tao theo tieu chuan. C cau nh v kep chac o ga tren ban may: C cau nay la then dan hng vi o ga phay va co ranh ch T, ch U bat chat tren ban may. 2, Nguyn l lm vic ca g gia cng khoan rng l trn chi tit hp. Lp chi tit vo : Cht tr ngn : nh v 2 bc; Cht trm nh v 1

bc(chng xoay); nh v 3 bc. t chi tit ln g, cho 2 l lt vo cht tr ngn v cht trm, cho chm st vo cc c , sau gt cn v

SVTH : L HONG LI


GVHD : L VNH HIU

vn c chun chun kp cht chi tit li, lc ny ta c th khot 2 l d dng trn my khoan chuyn dng .( my khoan 2 trc). Tho chi tit ra : Sau khi khoan xong ta vn c chun chun ra , sau gt cn v ly chi tit ra . Trong thc t khng cn phi c cn kp cht , ch cn t chi tit vo v tr v dng thanh st nh gi nh trn chi tit l c th khot d dng . 3, Phng phap tnh lc kep Chon ng knh bu long theo cong thc: D = c.Wct

C = 1.4 oi vi ren he met c ban : = 8 10: ng suat keo ,(kg/mm2) w : lc kep do ren tao ra; kg d : ng knh nh ren.

(mm). trang 77 tai lieu [VII]

d = c.

Wct

vay khi gia cong cac lo ta ch can chon ng knh ren M18 e kep chat chi tiet khi gia cong la at yeu cau. 4, Xac nh Sai So Che Tao Cho Phep Che Tao Cua o Ga Cac thanh phan cua sai so gia at. Sai so cua o ga anh hong en sai so cua kch thc gia cong, nhng phan ln no anh hng en sai so v tr tng quan gia be mat gia cong va be mat chuan. Khi gia xong bang phien dan dung cu th sai so o ga anh hng en khoang cach tam cua cac lo gia cong va khoang cach t mat nh v ti tam lo. Sai so cua ga tien ngoai, tien trong, anh hng en sao so cua v tr tng quan gia be mat gia cong va be mat chuan cua chi tiet gia cong, nhng khong anh hng en sai so cua be mat gia cong.SVTH : L HONG LI

= c.

2068 10

= 18mm


GVHD : L VNH HIU

*Hng da bao quan o ga: Khi s dung o ga thao tac phai nhe nhang at va lay chi tiet gia cong mot cach nhe nhang tranh lam bien dang cac chi tiet nh v. Sau khi s dung song phai lau chui o ga. *anh gia a khuyet iem cua o ga. Ket cau o ga tng oi n gian thuan tien cho viec thao lap chi tiet gia cong c de dang va nhanh chong. o ga n gian khong co g phc tap tng oi de thao lap vi ban may nh hai bu long ch T. o ga co khuyet iem la thao lap chi tiet gia cong nhieu lan se dan en viec mon cac chi tiet nh v se dan ti sai so do o sau mot thi gian cac can kiem tra lai cac chi tiet nh v.

SVTH : L HONG LI


GVHD : L VNH HIU

MC LC

CHNG 1 :..............................................................................................................................1 XC NH DNG SN XUT................................................................................................1 CHNG 2 :..............................................................................................................................3 PHN TCH CHI TIT GIA CNG.........................................................................................3 CHNG 3 : CHN PHI V PHNG PHP....................................................................4 CH TO PHI.........................................................................................................................4 CHNG 4 : CHN TIN TRNH GIA CNG......................................................................6 CHNG 5 :............................................................................................................................11 THIT K NGUYN CNG...................................................................................................11 CHNG 6 :............................................................................................................................25 XC NH LNG D V CC.........................................................................................25 KCH THC..........................................................................................................................25 CHNG 7 : XC NH CH CT V THI GIAN GIA CNG C BN..............26 CHNG 8 :LP PHIU TNG HP NGUYN CNG TI U......................................40 CHNG 9:TNH TOAN VA THIET KE O GA...............................................45

SVTH : L HONG LI

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