Đề tài máy bào ngang loại 2

D6 an May bao
LaI NOI

loai 2.

se man: N guyen Ly - Chi TiSt May

Diu

Man h9C nguyen If; may la man h9C co' so' khong thi thidu duac a6i voi nganh co' khi,
nganh chd tao may noi rieng va cac nganh cong nghiep khac noi chung. Day la man
h9C aau tien a¢t n~n mong cho nhiing kidn thuc v~ may, la co' so' can thidt cho cac
man
h9C khac nhu chi tidt may, may cdt ...

tu« kd ad an man h9C nguyen If; may la mot khdu rat quan trong nhdm muc
dich giup cho sinh vien tong kit lai nhiing kien thuc ail duoc trinh bay trong khi h9C
If; thuyet, mat khac thidt kd ad an giup cho sinh vien cung

c6 va me rong

them kidn

thtrc v~ If; thuyet va thuc tiin.
Dd lam quen voi cong viec thidt kd email duac giao a~ bai thidt kd "May bao
ngang loai 2" phuong an 2. Trong thai gian lam ad an email duoc su giup ao' cua
cdc thdy giao huang dan va su tim toi h9C hoi ban be. Email hoan thanh ad an man
h9C nguyen If; may.
Lan aau lam quen voi cong viec thidt kd nen em con

co nhi~u sai sot, thidu kinh

nghiem thuc tiin. Vqy nen em kinh mong cac thdy, co giao giup ao' va chi bao them
ai em nam viing va hidu mot each. thau dao hon cac kidn thuc.
Em xin chan thanh cam on su' chi bao tdn tinh cua thdy giao huang dan Tran Van
Lam trong suot qua trinh huang dan ad an man h9C nay.
Sinh vien thidt kd
Trinh van vinh

Sinh vien
Sinh
vien .Nguyen
.Nguyen Hiru
Hiru Tinh
Tinh - Lap K39MB
K39MB
-1-


se mon

D6 an May bao loai 2.

: N guyen Ly - Chi TiSt May

PhdnI
PHAN

ticn DONG

HOC CO

ciu CHiNH

A. GiOi thieu nguyen Lv Lam viec:
May bao ngang loai 2 la mot trong cac loai may dt got thong dung nhat, Gay la loai
may cong taco CO"c~u chinh g6m 5 khau 7 khop, nguyen I;' lam viec so b9 nhir sau:
khi khau dftn (1) quay G~U(dftn dong bang dong co dien) nho co cau culit (3) chuyen
dong l~c qua l~c lai trong pham vi g6c l~c \If nao do. Qua khau (4) chuyen dong vim
quay quanh khop B vira chuyen dong tinh tien, Khau (5) mang GAubao chuyen dong
qua lai
nho khop dinh vi C (khop tnrot) thea phuong ngang.
Hinh

ve :
H

c

\

\

\

\

\

\

\

\

\

\

I

\

I

I

I

I

I

I

I

I

I

I

'7

I

I

I

I

I

I

I

I

I

I

I
p,


D6 an May bao

loai 2.

se man: N guyen Ly - Chi TiSt May

B. Phan tich dong hoc cO'cau:
I. Tinh b(ic tl;l'do cua co cau va xip loqi co cau.
1. Tinh bdc

{'If'

do cua co' cdu:

Theo cong thirc :
Trong do:

W=3n-(2ps+P4)-S-Wd

n =5 : s6 khau dong cua co c~u.

P4=0

: s6 khop loai cao.

p-=?

: s6 khop loai thap.

s=O

: s6 fang buoc thira.

Wd=O

: s6 bac tv do thira.

Vay:

W=3.5-2.7=1

=> co ciu co mot b~c tv do.

2. XSp loai co cau:
Tach nhom axua: gom 2 nhom loai 2,

(y

day khau (1) duoc chon lam khau d~n.

Nhom 1: gom khau (4) va khau (5) loai 2 khau 3 khop, nhom loai 2.
Nhom 2: gom khau (2) va khau (3) loai 2 khau 3 khop, nhom loai 2.
V~y co c~u loai 2. Cac nhom duoc bieu dien nhu hinh ve.

/7T7777


se mon

D6 an May bao loai 2.

: N guyen Ly - Chi TiSt May

II. Tinh todn d{jng hoc ca cau - vi hoq db chuyen vi:
De ve duoc hoa d6 chuyen vi thea cac sf>lieu dfl cho ta phai tinh duoc cac kich
thuoc chua biet.
Til cong tlnrc:

n =

2n.n]
60

=
1

65.2
= 81 76(v/
(2 + 1).0,53
'

v.k
=
(k + 1).H

1

(J)

K = 1800 + '"
1800 -lj/ =>

p

= 3,14.81,76 = 8

30

Tinh chien dai tay quay

h)

LOlA

'

55(rad / s)

.xet tam giac 02DB :

Trong do:

DB=HJ2=265 (mm).
=> 02B=DB/sin('V12)=530 (mm)

02D=02B.cos('V12)=458,99 (mm).
Xet hai tam giac vuong dong dang 0 [02A va B02D.
Ta c6 g6c:
=>

BD02=01A02=900

0[02
02B

Trong d6:

= OJA
DB

0]02=D02-1,2R

02B=530
DB=265
O)A=R
=>

458,99 -1,2R
530

=

R
265

va c6 chung g6c:

D02B='V12


se man:

D6 an May bao loai 2.

R = 265.458,99

=>

530 + 265.1,2

N guyen Ly - Chi TiSt May

= 143,434(mm)

Xet tam giac vuong OjA02:
C6:

0102=Rlsin(\jJ/2)=143,43/sin(30o)=286,87 (mm)

* Ve hoa d6 vi tri:
Chon doan bieu di€n tay quay:
01A=70(mm)

3

Ji, = 0,1~~4

V~y ta c6 ty 1~xich:

=

0,00205( m I mm)

Nen ta c6 cac dean bieu dien:

oB=
2

0,53 = 258 53(mm)
00, 0205
'

°, 05H °,0,0265
00205
=

H =

00
1

=
2

oD
2

0,53
0,00205

=

=

=

12 92(mm)
'

258 53(mm)
'

0,288687 = 139.93(mm)
00, 0205
0,45899 = 223 89(mm)
00, 0205
'

Vay ta c6 th@dung co cAu tren ban ve Ao. D~u tien lay diem 01 bfrt ky, l~p h~ true
toa d9 OIXYvoi true OIX nam ngang, tl1,1COIY thang dung. Lfry diem O2 sao cho
0102=l39,93 (mm). Tai tam OJ quay mot vong tron ban kinh R=70 (mm), qua O2 ke 2
tiep tuyen voi vong tron 01 ban kinh R. Tir hai tiep diem d6 ta chia dirong tron thanh 8
phan bang nhau .Qua d6 ta xac dinh duoc 8 vi tri .cong voi hai vi tri O,05H va mot vi


D6 an May bao loai 2.

se man: N guyen Ly - Chi TiSt May

tri bien phai .Nhir vay ta co 11 vi tri va ta ve hoa d6 cho 11 vi tri do .ta danh s6 sao cho

dAu tien la diem xuat phat cua qua trinh lam viec .Tren duong tiep tuyen ta lc1ydean

02B=258,53 (rnmj.Tir each ve tren ta co co cc1umay bao ngang 10c;t12 hoan toan xac
dinh voi 11 vi tri .


D6 an May bao

loai 2.

se man: N guyen Ly - Chi TiSt May

HOA.
DO
Pc

~

VI TRI

"

f.ll = O.OO205m/mm
f.lr =H2J~5 N/mm
H

O,OSH

_-----

x

Pc

PHANII

HO.(1

DO VJN TOe.


se man:

D6 an May bao loai 2.

N guyen Ly - Chi TiSt May

Tir hoa d6 chuyen vi va nr cac s6 lieu d[ biet ta ve diroc hoa d6 v~n t6c ling voi 11
vi tri tren hoa d6 chuyen vi. Gia thiet cua bai toan nay d[ bi€t duoc van t6c cua cac
khau tai tung thai diem khau d~n quay dSu cling chiSu kim dong h6 coI=const.
1. lphuong

trinh vee to' van t6c :

Voi may bao kieu nay each ve (y cac vi tri wong nr nhau nen ta chi neu each ve (y 1 vi
tri .
Xet van t6c tai diem A ,ta c6 :

Trong d6

VAl c6:

- Chieu cung chieu voi

- Plnrong vuong g6c voi OIA
001.

- Tri s6 : V AI=VA2=OOlLoIA=8,55.70=598,5 (mm/s).
Xac dinh v~n t6c diem A tren khau (3) ,ta thay khau (3) tnrot so voi khan (2) do d6 ta
c6 :
(1)
Trong d6

VA2 c6:

- ChiSu cung chien voi
V A3 c6:

- Phuong vuong g6c voi OIA
001

- Phuong vuong g6c voi 02B

- Tri s6 chua biet .
V A3/A2 c6:

- Phuong song song voi 02B

Vay ta c6 thS giai duoc phuong trinh (1) bang phuong phap hoa d6 .

Xet van t6c tai diem B :
Ta c6: khau (3) n6i val khau (4) bang khop tnrot, khau (4) noi voi khau (5)

bang khop quay nen:


se mon

D6 an May bao loai 2.

: Nguyen Ly - Chi TiSt May

Trong d6 V B4 c6:
- Phuo-ng trung voi phuong tnrot cua dAu bao (phuong ngang )
- Tri s6 chua biSt .
Tren thanh 02B ta biSt O2 co V 02=0 la di~m thir 2 .V~yd~ xac dinh van
t6c cua di~m B ta ap dung dinh ly d6ng dang thuan, Ta duoc:
VB3 _- -L---0==2BV:_c=A-=3-V- B3 _- -L02B ~
V A3 L02A
L02A
V B3

co

-Phirong chien cung voi V A3

V B41B3 c6

- Phuo-ng song song voi 02B

- Tri s6 chua biSt
Phuo-ng trinh (2) con 2 An ta co th~ giai diroc bang phuong phap hoa d6.
2. Cach ve hoa d6 :

Ta chon mot ty l~ xich

u;

=

Ji,.OJI = 0,00205.8,55 = 0,0175275(m I mm)

Chon mot diem P blh ky lam goc hoa d6 .Tir P ve cac vecto p a I 2 bieu thi vecto VAI,2
.Tir a Ike mot duong thang ~ 1 song song voi plnrong tnrot

°

2B .

Tir P ke duong thang ~3 vuong g6c voi phuong tnrot 02B .Hai duong thang d6 citt
nhau tai a3 .Khi d6 Pa3 bieu di~n van t6c V A3.
, -lOB
Keo dai Pa3 voi quan h~ v~n toe Vb3 = Va3.-1_2_

ta duoc Pb3 bieu thi v~n t6c PB3 .

02A

Qua b3 ke mot duong thang ~2 song song voi phuong tnrot 02B. Qua P ke duong
thang song song voi phuong tinh ti~n cua dAu baocat dirong ~2 tai b, == bs. Khi d6
Pb4 == PbS bi~u thi van t6c Vb4 == VbS .


se man:

D6 an May bao loai 2.

HOA DO

N guyen Ly - Chi TiSt May

vAN TOC

3. Tinh v~n t6c g6c cua cac khau quay
Vi khau 2 va 3 n6i voi nhau bang khop tinh tien nen:

{J)2

Mat khac khau 3va 4 n6i voi nhau bang khop tinh tien nen

=

(J) 4

{J)3

=

{J)3

Do do ta c6
Chieu xac dinh bang each d~t Pia3 vao di€m A va so voi O2
Bang hoa d6 v~n t6c ta xac dinh duoc van t6c cua tftt d. cac diem thuoc cac khau, dong thoi
ta cling tinh duoc van t6c g6c cua cac khau.

Sinh vien .Nguyen Hiru Tinh - Lap K39MB
10


D6 an May bao loai 2.

se man: N guyen Ly - Chi TiSt May

Sau khi ve hoa d6 van t6c ta xac dinh duoc Van t6c cac di@m tren cac khau.chung
bieu di~n trong bang 1, 2 .

Bang 1: Biiu diJn v(in lac cdc iliim tren cdc khdu. (mm)

VT

Pal,2

Pa3

Pb3

Pb45

b3b4

1

70

2

70

27,08

°

44,95

°

°

50.66

23,36

°

64,55

3

70

43,24

60,96

66,3

26,07

55,05

4

70

65,73

72,97

74,07

12,73

24,06

5

70

68,93

73,75

74,03

5,6

12,17

6

70

52,92

62,72

71,12

22,5

45,83

7

70

27,08

44,95

50,66

23,36

64,55

8

70

16,96

31,03

35,48

17,27

67,91

9

70

10

70

°

41,35

°

116,19

°

°

70

1126,98 51,23

56,48

11

70

61,19

189,07

194,9

47,32

33,09

a2a3

70

Bang 2 : Gia tri th~t van t6c cac diSm tren cac khau: I-!v = 0,01752 (m/mms).

V

V A12

VA3

VB3

VB45

VB3B4

°

°

°

°

VA2A3

(1)3,

rad/s

T
1

1,226

1,226

°

2

1,226

0,47

0,79

0,9

0,41

1,l3

1,53

3

1,226

0,76

1,07

1,16

0,46

0,96

2,14

4

1,226

1,15

1,28

1,3

0,22

0,42

2,75

-

Sinh vien .Nguye n Hiru Tinh - Lap K39MB

duoc

se mon

D6 an May bao loai 2.

: N guyen Ly - Chi TiSt May

5

1,226

1,21

1,29

1,3

0,1

0,21

2,82

6

1,226

0,93

1,18

1,25

0,39

0,8

2,44

7

1,226

0,47

0,97

0,9

0,41

1,13

1,53

8

1,226

0,3

0,54

0,62

0,3

1,2

1,04

9

1,226
1,226

0,72

°

2,04

°

2,22

°

1,23

10

°

0,9

0,99

4,17

11

1,226

1,07

3,31

3,41

0,83

0,58

7,01

°

PHANIII

HO~

DO GIA TOe

Gia thiet coI= eonst ta ve hoa d6 eho hai vi tri la vi tri 6 va vi tri 11. Trong d6
tri s6 6 may dang

a che de>lam viec va vi tri s6 11 ling voi hanh trinh chay khong,

D€ tien tinh toan va ve bieu d6 ta chon ty l~ xicb u,:
Ila= CO[2. IlL=8,552.O,00205= 0,14986m.s2)
1. Phuong trinh quan h~ gia t6e tren cac khau:
- Tai diem A ta e6:

a

A2

= aAI

(do khau 2 va khau 1 n6i voi nhau nho 1 khop quay)

Trong d6:

+ a~1 = co~.lOlA' chien huang til A~OI' phuong vuong g6e voi OIA.
+ a~ I =
+

°

do khau d~n OIA quay d~u.

a co cung phuong,
A2

a vi

chieu va tri s6 voi

a

AI


se man:

D6 an May bao loai 2.

+

akA-A
3 2

+

a~3A2

c6 chieu la chieu cua vee to' van
t6c
•

N guyen Ly - Chi TiSt May
quay di mot g6c 90° thuan theo

VA 3 A 2

c6 phuong song song 02B, tri s6 chua biet,

+ itA3 c6 phuong vuong g6c 02A, tri s6 chua biet,

V~y phirong trinh (4) con hai Anla tri s6 cua

va

a~3A2

a:3

nen c6 th€ giai duoc bang

phuong phap hoa d6 vee to'.
- TC;!diiem B ta c6:

Trong d6 :

+

a

C6 chien cling chien voi

B3

a

A3

+

a B4

c6 phuong ngang, tri s6 chua biet,
c6 chieu la chieu cua vee to' van t6c

+a~4B3

chieu

+

a

VB4B3

quay di mot g6c 90° thuan theo

003 .

~4 B3

c6 chieu song song voi 02B, tri s6 chua

biet,
V~y phuong trinh (5) con hai Anta c6 th€ giai diroc bang phuong phap hoa d6 vee to'.
Gia t6c trong tam S3 cau cac khau 3 xac dinh theo dinh
van toe:

2. Xac dinh cac doan bien di€n
Sinh
Sinh vien .Nguyen Hiru
Hiru Tinh
Tinh-- Lap
LapK39MB
K39MB

13

Iy d6ng

dang nhu khi xac dinh


Chon ty xich gia t6c la

~a.

Sinh
Sinh vien .Nguyen Hiru
Hiru Tinh
Tinh-- Lap

LapK39MB
K39MB

14


D6 an May bao

se

loai 2.

!-la = a A:
nal

= ro~.l~IA

man: N guyen Ly - Chi TiSt

_ ro~.~.!-lL

nal

nal

Chon Jra; = 70mm bang dean biSu diSn 0IA tren hoa
f.1 =

=>

)

2
Jr.n[

2

1[(1

I

ak
A)A2

=
=

(·f.130=

L

a.

)2

= -

·f.1

WI

May

30
( 3,14.81,76

d6 vi tri.

.0,00205 ~ 0.14986(m/ s .mm)
2

L

= OA = 70mm

2

ro3·v A

A
3

=

2

2v A) .v A)A2
l02A

2Pa3 .a3a2.roi·!-lL

02A

=

2~.!-l~

.¥z

!-lL"02A

--

2Pa 3 .a3a 2 .u,

= -----====--

°2A

=>
V~y dung diroc doan a'k ,
C6 thS dung dean bieu diSn a;k ngay tren hoa d6 co"du thea ti 1~cua phuong trinh

tren chi ra tren hoa
Tinh

Ma

-n

a A3

d6 vi tri


se man:

Db an May bao loai 2.

N guyen Ly - Chi TiSt May

-2

=> 7tn

A)

=

Pa3
02A

C6 th~ dung doan bieu dien

1m 3

ngay tren hoa db co du thea ti l~ cua phirong

trinh tren chi ra tren hoa db vi tri nhir tren
+Tinh

b~k:

3. Cach dung boa db gia t6c
Tai cac vi tri khac nhau phuong trinh vecto gia t6c hoan toan giong nhau va each
ve cling giong nhau. Vi v~y ta chi ve hoa db gia t6c

a mot vi tri. Chon 7t lam g6c dung

7ta~ (a~ == a;) nr mut a~ dung a;k vuong g6c voi phuong tnrot 02B. Tir g6c 7tdung
nn A3. Ttl"mut k ke phuong a ~3A2va nr mut n 3 ke phuong a ~3 ' giao cua 2 duong
nay
la diem a;. Tir a; keo dai voi quan h~ 7tb'3= 7ta~_llo_2tBa _diroc ---;--~bi~u
02A

Ttb~

thi gia t6c

Til"k , mot ducng thang song song voi phuong tnrot 02B. Mat khac, Tir 7t ke mot
duong thing song song voi phuong ngang . Khi d6 hai duong thang c~t nhau tai b~
bieu thi v~n t6c a 64 == a 65

.


D6 an May bao

loai 2.

se man: N guyen Ly - Chi TiSt May

HO~

DO

roc

GIA

ai=a

2

4.Gia t6c g6c cac khau
Vi khau 2 va 3 n6i voi nhau bang khop tinh tien nen:

e2

=

e3

Mat khac khau 3va 4 n6i voi nhau bang khop tinh tien nen e 3 =

Do

e4

do ta co

Bang 3:

su« diin

va sa 11: Pa

=

gia tac cdc iliim tren cdc khdu, gia tac trong tam t{ji vi tri sa 6

O.14986(mls2)

Gia tri bieu diSn (mm)

Gia tri thucun/s"

Vi tri

06

11

Vi tri

06

11

ITa' J 2

70

70

aAl,2

10,49

10,49


D6 an

se man:

May bao loai 2.

N guyen Ly - Chi TiSt May

na' 3

24,46

107,28

aA3

3,66

16,07

rrb",

31,06

331,49

ab3

4,65

49,67

nb' 4,S

11,86

222,34

ab3b4

1,77

33,31

ns' 3

18,65

204,33

aS3

2,97

30,62

c(rad/s2)

9,65

105,09

strad/s'')

PHANIV

PHAN

ttctt LT!C HQC ca CAU

N Qi dung cua bai toan phan tich dong hoc co cftu chinh la di xac dinh ap lire tai cac
khop dong va tinh rna men can bang tren khau d~n. Co

sa d~ giai la nguyen

ly

Dalambe, Khi ta them cac luc quan tinh ta se l~p duoc cac phuong trinh can bang luc
cua cac khau, cua co cau va cua may. Dua vao cac phuong trinh can bang hrc nay,

bang phuong phap ve da giac hrc ta giai ra cac luc chua biet d6 Ia ap hrc tai cac khop
dong, Cuoi cling con lai khau d~n ta se tinh duoc rna men can bang.
Ta tien hanh phan tich ap lire khop dong cho co cftu tai 2 vi tri lam viec d6 la vi tri 6
va vi tri chay khong 11. Dong thai xac dinh momen can bang d~t vao khau d~n. Viec
tien hanh phan tich ap lire khop dong d6i voi 2 vi tri tuong t1,1n'hau nen ta chi tien
hanh cho mot vi tri 6 ( rieng vi tri 11 khong c6 hrc can Pc).
Luc can c6 ich chi tac dong tren khau 5

a cac vi tri 2 -;-6 va a t~t ca vi tri d6 d~u

bang hang s6. Tri s6 cua lire nay bang:

P ci = P, = 2900 N.

- Dff cho: G=ql; q=30 (Kg/m); G2=G4=0; GS=4G3; Js =(m.L2)112; Trong tam cua
khau n~m

1: Tfnh

a trung

diem kich thuoc dong .

khoi hrong va trong luong cac khau :

Chon g= 10 m/s

2

=> q=300(N/m) Trong d6 :

G: Trong hrong khan

L: Chien dai khau
Sinh vien
Sinh
vien .Nguyen
.Nguyen Hiru
Hiru Tinh
Tinh-- Lap
LapK39MB

K39MB

18


se man:

D6 an May bao loai 2.

N guyen Ly - Chi TiSt May

q: Trong luang phan b6 theo ehi@udai

=> m.= 4,3029 (Kg)

G, = q.L01A = 300.0,14343 = 43,029(N)

m3 = q.L02c

=

300.0,583

=

174,9(N) => m, =10 =17,49 (Kg)

ms = 4.m3 = 4.174,9 = 699,6(N) => m, = 69,96 (Kg)
2:Xac ilinh lU'cquan tinh cua cac khau

* khau

5

Do khau 5 chuyen d9ng tinh tien nen b == s

=> Fqts co phuong ngang e6 chien nguoc chieu voi chieu

Vi tri s6 6: Fqts =69,96.11,86.0,14986

=

Vi tri s6 11: Fqts =69,96.0,14986.222,34

=

2331,058 (N )

Do khau Jchuyen dong quay quanh true e6 dinh qua
tam va d~p k co phuong chieu ngiroc chieu

Vi tri s6 11:

Fqt3
Fqt3

co gia tri

124,34 (N)

* Khau I

Vi tri s6 6:

1lSs'

1lS3'

° nen hrc quan tinh co diem d~t tai

co gia tri

=17,49.0,14986.18,65 = 48,88 (N)
=17,49.0,14986.204,33

* Xac dinh trong tam khau

=

535,55 (N )

(3) :

Trong tam khau 3 d~t (y trung diem cua kich thuoc dong cua khau 3

*

Xac dinh tam va d~p K:

Khoang each nr O2 dSn KIa:


se man:

D6 an May baa loai 2.

N guyen Ly - Chi TiSt May

Vai

=

2.583
3

~ 388,6mm ~ O,3886m

3 :Ap luc tai cdc khop dong

*

Tai

vi tri s6 6:

Ta tach nhom Axua (4- 5) va dilt fwc vao nhom fa :
( Pc, PqtS,Gs ,Ros ,R34) ~ 0.
Phuong trinh can bang luc

Trang phuong trinh tren co : Pc, G s , dii xac dinh hoan toan , ta
di;it tai Ss chieu nguoc

co PqtS co diem

7t b;

Ros c phuong vuong g6c voi phuong tnrot R34 chua xac dinh . Ta tach rieng
khau 4: Cac luc tac dung la : (R34 ,R4S ) ~ 0 . ta thay rang R34 ,R4S co phuong
vuong g6c voi can tnrot va ta co : RS4 + R34 = 0

(2)

.Vay h~ phuong trinh (1) (2) giai duoc bang phuong phap ve hoa d6 luc va ta se xac
dinh duoc R34 va Ros nho vao hoa d6 .
Ta chon ty 1~xich J...lp

=

10 N/mm.


D6 an May bao loai 2.

se man: N guyen Ly - Chi TiSt May

..

~
I

! -

811

RJ4 P

Phan tich hrc nh6m at xua 4-5
Ve hoa d6 lire ta xac dinh duoc :

Ros

Vi tri s6 6:

Ros = 116,2 (N)

Vi tri s6 11:

*

1623,6 (N)

=

xac dinh diem d~t cua Ros

- -

- - -

Tach rieng khau (5) d~t cac luc (G s 'Pqt5 ,Pc, Ros,R4S
Xac dinh cac diem d~t cua R05 l§.y

IMD

~

=Ros·x-Gs·h-Pc·yc

X =

rna

men d6i voi diem D ta duoc

=0

Gs·h+Pcyc
.:::.... ----=.::......=..

Ros
Vi tri s6 6: 0,406 (m

)

Vi tri s6 11: 0,076 (m)
D~ xac dinh ~s ta dua vao phuong trinh (2)

- +R °
RS4

34 =

-r

,,_

- R5-4

)

R 34

-

Sinh vien .Nguyen Hiru Tinh - Lap K39MB
-20-21-


~

R45

= R34

Sinh vien .Nguyen Hiru Tinh - Lap K39MB
-20-22-


D6 an May bao loai 2.

se man:

N guyen Ly - Chi TiSt May

Tach nhom axua (2-3) cdc l(I'c dijt len nhom la :

Phuong trinh can bang luc :
Trong phuong trinh tren c6 :
G 3 dft xac dinh hoan toan

Pqt3c6 diem d~t tai K3, phuong song song voi nS' 3 , chien nguoc
lai, Tach rieng khau 2, cac luc d~t len la : (R32 ,R'2) ~ 0 .
Do do R32 , R12 tao thanh h~ hrc can bang nen chung phai true d6i :
R32 = - R12 , c6 phuong vuong g6c voi phuong tnrot .
Tach rieng khau 3 va lAyMomen voi diem O2 ,ta c6 :
LM02(FK)

=

~3.02B

- Pqt3.hqt3- G3.hG3- R12.02A

=

0

=> Tai vi tri s6 6:
R'2

=

(~3.02B

- Pqt3.hqt3- G3.h3)/02A = 3656,28

(N) Vi tri s6 11:
R'2=8710,9 (N)
vay bai toan con lai 2 ~n bang phuong phap ve hoa d6 hrc ta xe xac dinh duoc cac
thanh phan con lai .
Ta chon

ty l~ xich ~p = 10 N/mm


D6

Bo man:

an May bao loai 2.

N guyen Ly - Chi Ti~t May

h

Phan tich hrc nh6rn cit xua 2- 3

Cac doan bieu di~n khac la:
Vi tri s6 6:

R03

Vi tri s6 11:

= 836 (N) va R45 = R34 =2925,5

Ro3

= 4869 (N)

(N)

va R45 = R34 =1949,2

(N)

4. Xdc ilinh Momen din b&ngkhiiu dan.
A

Vi tri s6 6 :
a. phuong phap luc
Xet khau d~n : Ta l~y Mornen voi diem O[
Sinh vien .Nguyen Hiru Tinh - Lap K39MB

-22-


D6 an May bao loai 2.

se man:

N guyen Ly - Chi TiSt May

ta ducc :
MeB =( R21.h- G1.h1).J.!L
thay s6 vao ta c6 :
MeB = ( 3656,2.52,92--43,029.30,31 ) . 0,00205 = 393,972 (N.m)
b, Xac dinh Momen can bang khau dftn bang phuong phap don Jucopski
Dua vao phirong phap di chuyen kha di
{ Trong 1 h~ lire can bang , t6ng cong sufrt nrc thai cua tfrt ca cac lire =0 trong moi
di chuyen kha di}
Xoay hoa d6 van t6c di 90° thea chieu

UJ

1va d~t tfrt ca cac hrc nrong irng

=-0,00205.[ (-2900+ 124,34).72,12+ 48,88.42,66 +43,02.30,31 + 174,9.72,12]=398,65
0 _

0
~)..
398,65 - 393,97
Phan tram sai s6 vi tri s6 6 la
39397
.100Yo-1,18Yo .D~t yeu cau
,
Vi tri s6 6 :
a. phuong phap Iuc
Xet khau dftn : Ta IfryMomen voi diem
01 ta duoc :
MeB =( R21.h + G1.h1).J.!
L Thay s6, ta c6 :
MeB = (8710,9.57,7 + 43,02.9,6) . 0,00205 = 1031,21 (N.m)
b, Xac dinh Momen can bang khau dftn bang phuong phap don Jucopski
Xoay hoa d6 v~n t6c di 90° thea chien

UJ I

va d~t tfrt ca cac hrc nrong img

= 0,00205.[ 2331,058.194,9 +535,55.55,42 + 174,9.27,46- 43,02.9,6 ] =1001,17

Sinh vien .Nguyen Hiru Tinh - Lap K39MB
-25-