Cac tieu chuan co ban ve trinh bay ban ve.pdf

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I- gii thiu v tcvn v iso

- Tiu chun l nhng iu khon, ch tiu k thut p dng cho mt (hoc mt nhm) i tng nhm m bo tho mn cc yu cu ra.

Chng 1

Cc tiu chun c bn v trnh by bn v

- Tiu chun thng do mt t chc c kh nng v chuyn mn, k thut, nghip v son tho v xut, sau phi c mt t chc cp cao hn xt duyt v cng b.

- Mi nc u c h thng tiu chun ring ca mnh.

- Mi tiu chun u mang tnh php l k thut ; mi cn b

k thut phi nghim tc p dng

2/28

Tiu chun quc t ISO

( International Organization for Standardization )

- Thnh lp t nm 1946

- Pht trin mnh m v nhiu lnh vc

- Vit Nam v ang tng bc p dng ISO trong mt s

lnh vc.

- Cc tiu chun u c nh k sot xt, b sung

3/28

II- kh giy: Mi bn v phi c v trn mt kh giy qui

nh gi l kh bn v, l kch thc ca t giy sau khi xn.

TCVN 2-74 quy nh nhng kh chnh trong ngnh c kh:

Ngoi ra cn c kh ph v kh c bit, cu to t kh n v

* ngha ca k hiu kh: Gm 2 con s. S th nht ch bi s

cnh di 297,25mm ca kh n v; s th hai ch bi s cnh

ngn 210.25mm. Tch ca 2 con s bng s lng ca kh n v

cha trong kh giy .

Kh A0 kch thc 1189 x 841 mm cn gi l kh 44




Kh A4 kch thc 297 x 210 mm cn gi l kh 11 (Trong kh A4 c gi l kh n v)

4/28

525

5

5 Khung bn v

Khung tn

a- Khung bn v: V

bng nt lin m v c

k cch mp t giy

5mm. Khi cn ng thnh

tp th cnh tri ca

khung bn v k cch

mp tri t giy 25mm

b- Khung tn: V bng nt lin m v c t gc phi,

pha di ca bn v. Cnh di ca khung tn xc nh hng -

ng bng ca bn v. C th t khung tn dc theo cnh di

hoc cnh ngn ca kh giy, ring kh A4 phi t theo cnh

ngn.

1- khung bn v v khung tn: Mi bn v u phi

c khung bn v v khung tn

5/28

A2

A2 A3

A4

A4

A3

A3

Cho php v chung trn mt t giy nhiu bn v nhng mi bn

v phi c khung bn v v khung tn ring. Hng ca u con s

kch thc l t di ln trn v t phi sang tri

6/28

* Khung tn dng trong nh trng c th dng mu sau:

20 30 15

25

140

88 3

2

88 (1) (2) (3)

(4) (5) (6)(7)

(8)(9)(10)

(11)

Ni dung ghi trong cc ca khung tn:

(1)- Ngi v

(2)- H v tn ngi v

(3)- Ngy v

(4)- Kim tra

(5)- Ch k ngi kim tra

(6)- Ngy hon thnh

(7)- u bi tp hay tn gi chi tit

(8)- Vt liu ca chi tit

(9)- Tn trng, khoa, lp

(10)- T l bn v

(11)- K hiu bn v

7/28

III- t l :

T l ca bn v l t s gia kch thc o c trn hnh biu din

vi kch thc tng ng o c trn vt th

Trong mt bn v k thut, cc hnh biu din phi v theo cc t

l do TCVN 3-74 quy nh. C th:

T l thu nh : 1:2 1:2,5 1:4 1:5 1:10 1:15 1:20

T l phng to : 2:1 2,5:1 4:1 5:1 10:1 20:1 40:1

T l nguyn hnh : 1:1

K hiu t l c ghi dnh ring trong khung tn ca bn v

v c vit theo kiu : 1:1 ; 1:2 ; 2:1 v.v Cn trong nhng tr-ng hp khc phi ghi theo kiu : TL 1:1 ; TL 1:2 ; TL 2:1 ...

* Ch : D bn v v theo t l no th con s kch thc ghi

trn bn v vn l gi tr thc, khng ph thuc vo t l.

8/28

IV- ch v s vit trn bn v

Ch v s vit trn bn v phi r rng, chnh xc, khng gy

nhm ln v c quy nh bi TCVN 6-85

* Kh ch: L chiu cao h ca ch in hoa.

C cc loi kh: 2,5 ; 3,5 ; 5 ; 7 ; 10 ; 14 ; 20 ; 28 ; 40 ; ... Cho

php dng kh > 40 nhng khng c dng kh < 2,5.

Kiu A: B dy nt ch = 1/14h (thng ng hoc nghing 750)

Kiu B: B dy nt ch = 1/10h (thng ng hoc nghing 750)

* C 2 kiu ch: Kiu A v kiu B.

Kiu A Kiu B

9/28

Khong cch gia 2 t, 2 con s: 6/14h 6/10h

Bc nh nht ca cc dng: 22/14h 17/10h

B dy nt ch: 1/14h 1/10h

Khong cch gia 2 ch, 2 ch s: 2/14h 2/10h

Cc thng s ca ch c xc nh theo kh ch nh sau:

Kiu A Kiu B

Chiu cao ch thng 10/14h 7/10h

ch hoa nghing

10/28

ch thng nghing

1 2 3 4 5 6 7 8 9 0

s nghing

11/28

ch hoa ng

12/28

ch thng ng

S ng

1 2 3 4 5 6 7 8 9 0

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V- ng nt

Trn bn v k thut, cc hnh biu din ca vt th c to

thnh bi nhiu loi ng c tnh cht khc nhau. phn bit,

chng phi c v bng nhng loi nt v khc nhau, lm cho

bn v thm sng sa v d c.

C 9 loi nt v (c th hin qua cc th d trang sau)

TCVN 0008-1993 quy nh tn gi, hnh dng, b dy v cng

dng ca cc loi nt v nh sau:

14/28

Cch v v cng dng ca cc loi nt

1- Nt lin m: v ng

bao thy ca vt th; khung

bn v; khung tn v.v

S = 0.5 - 0.7

2- Nt lin mnh: v ng

dng, ng kch thc, ng

gch mt ct v.v

S/3

3- Nt ln sng: V ng gii

hn cc hnh biu din

S/3

4- Nt dch dc: V ng ct

la di

S/3

5- Nt gch chm mnh:

v ng trc, ng tm, ng

chia ca bnh rng v.v

S/3

15/28

6- Nt t: V ng bao khut

ca vt th

7- Nt ct: ch v tr ca mt

phng ct

8- Nt gch chm m: Ch dn

cc b mt cn c x l ring (nhit

luyn, ph, ho bn)

9- Nt gch hai chm mnh: V tr

u, cui ca cc chi tit chuyn ng;

Phn chi tit nm trc mt phng ct v.v

S/2

1,5S

S/2

S/3

16/28

V d v cc nt v

1- Nt lin m

1

5- Nt gch - chm mnh

5

2

2- Nt linmnh

3

3- Nt ln sng

4

4- Nt dch dc

6

6- Nt t

1200 A

A 7

7- Nt ct

8 - 9 Xem trang sau

17/28

M Niken

9

8

8- Nt gch - chm m

- B dy ca mi loi nt v cn thng nht trong cng mt

bn v

* Mt s quy nh s dng cc loi nt v:

9- Nt gch - hai chm mnh

18/28

Tm ng trn c xc nh bi giao

im ca hai nt gch ( khng phi

du chm).

Cc nt gch chm hoc gch hai

chm phi bt u v kt thc bng

cc gch v k vt qu ng bao mt

khong bng 3 n 5 mm.

Tm ca l trn trn mt bch trn c xc nh bi 1 nt

cung trn ng tm vi vng trn mt bch v 1 nt gch hng

theo bn knh ca vng trn .

Nhng ng trn c K 12mm

(trn bn v), th ng tm v bng

nt lin mnh.

19/28

VI- ghi kch thc trn bn v

1- Nguyn tc chung:

Kch thc ghi trn bn v l gi tr kch thc thc ca vt th, khng ph thuc vo t l bn v.

Mi kch thc ch ghi mt ln, khng ghi lp li.

n v o kch thc di l mm, trn bn v khng ghi n v. Trng hp dng cc n v khc phi c ghi ch r rng.

n v o kch thc gc l , pht, giy.

2- Cc thnh phn ca mt kch

thc: Gm 4 thnh phn

401

2 3 4

1- ng dng

2- ng kch thc

3- Mi tn

4- Con s kch thc

Khng ghi kch thc ng bao khut.Khng dng ng trc, ng tm lm ng kch thc

20/28

ng dng:

L ng gii hn kch thc. c v bng nt lin mnh v c ko di t 2

ng bao, 2 ng trc, 2 ng tm, c

th gia 2 ng kthc khc. ab

ng dng c v vt qu ng

kch thc mt on t 3 n 5 mm

v c k vung gc vi on cn

ghi kch thc (Khi cn cho php k

xin gc nh hnh v bn).

ng kch thc:

Biu th on c ghi kthc v c k song song vi on

. N cng c v bng nt lin mnh v c vch gia 2 -

ng dng, 2 ng trc, 2 ng tm, c th vch gia 2 ng

bao hoc 2 ng kch thc khc.

21/28

45o

Khi thay mi tn bng vch xin th ng kch thc

cng v vt qu ng dng khong t 3 n 5 mm.

Mi tn:

a b c

Mi tn c v hai u ng kch thc

v chm vo ng dng. Hnh dng mi tn

c th v nh hnh a (mi tn c) hoc hnh

b (gc m 300)

- ng kch gc l mt cung trn c tm trng vi nh gc.

55

22/28

Cho php thay mi tn bng du

chm hoc vch xin

Mi tn c th v pha trong

hoc pha ngoi ng dng, con s

kthc cng c th vit bn ngoi

hoc bn trong ( nu vit bn ngoi

th phi vit v pha dng bn phi).

Khng cho php bt k ng nt no

ca bn v c v ct qua mi tn

6

Con s kch thc:

Ch gi tr tht ca kch thc, n

khng ph thuc vo t l bn v v

c vit vi kh t 2.5 tr ln.

23/28

Chiu ca con s kch thc di ph thuc vo chiu

nghing ca ng kch thc (xem hnh v). Nhng kch thc

nm trong khu vc cm th con s kch thc c dng v vit

ra ngoi, trn gi ngang.

Chiu con s kch thc gc ph thuc vo chiu nghing ca ng vung gc

vi phn gic ca gc .

42

Con s kthc gc nm trong khu vc cm bt buc phi dng v vit ra ngoi, trn gi ngang.

Cho php vit trn gi ngang cho mi trng hp.

30

24/28

3- Cc quy tc ghi kch thc:

Kch thc ng knh: ng trn v cc cung trn > 1/2 ng

trn th ghi kch thc ng knh. Trc con s ch gi tr ng knh

c k hiu ; ng kch thc k qua tm hoc dng ra ngoi.

80

60

>5

40

Kch thc di: Nu c nhiu kch

thc song song nhau th kch thc nh

t trong, kch thc ln t ra ngoi ;

cc ng kch thc cch nhau 1

khong > 5mm, lc con s kch th-

c c vit so le cho d c.

25/28

C th dng mt mi tn ghi kch thc

ng knh nhng ui mi tn phi ko qu

tm mt khong 1/3 bn knh.

50

12

40

26/28

Kch thc bn knh: Nhng cung trn 1/2 ng trn th ghi

kthc bn knh. Trc con s ch

gi tr bn knh c k hiu R, -

ng kch thc k qua tm cung

v ch c 1 mi tn.

R5 R10

Cu20

Ghi kch thc mp vt:

Khi gc vt bng 45o

Kch thc hnh cu: Trc k hiu ng knh hay bn knh cu

c ghi ch Cu hoc k hiu

Khi gc vt khc 45o

27/28

Ghi kch thc cnh hnh vung: C th ghi bng hai cch nh hnh di (k hiu c l vung)

40x40 40

4l10

Ghi kch thc cc phn t ging

nhau: Nu c nhiu phn t ging

nhau v phn b c qui lut th ch

ghi kch thc mt phn t km theo

s lng cc phn t.

28/28

Ghi kch thc theo chun 0 : Nu cc kch thc lin tip

nhau xut pht t mt chun chung th chn chun chung

ghi kch thc (chun 0). Chun c xc nh bng mt chm

m; cc ng kch thc ch c mt mi tn; con s kch thc -

c vit u ng dng.

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115

85

0

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Cac tieu chuan co ban ve trinh bay ban ve.pdf

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