TCVN TIEU CHUAN QUaC GIA

TCVN 8 -24 : 2002ISO 128 -24 : 1999

? - - ABAN VE KY THU~T-A & A' ~ ~

NGUYEN TAC CHUNG VE BIEU OlEN~ ,. - It. ? _ ,.

PHAN 24: NET VE TREN BAN VE CO KHITechnical drawings - General principles of presentation­

Part 24: Lines on mechanical engineering drawings

HA NOI - 2008

Ldin6idau

TCVN 8-24 : 2002 hoan toan tLlClngdLlClngvdi tieu chuan ISO 128-24: 1999

Tieu chuan nay do ban ky thuat tieu chuan TCVN/TC10 Ban ve ky thue: biensoan, Tong cue Tieu chuan £)0 ILlang chat ILI<;mgde nqh], 89 Khoa h9C vaCong ngh$ ban hanh,

Tieu chuan nay dLlgc chuyen doi narn 2008 tCt Tieu chuan Viet Nam cunq so

hieu thanh Tleu chuan Quoc gia theo quy dinh tal khoan 1 £)ieu 69 cua l.uat

Tleu chuan va Quy chuan ky thuat va di~m a khoan 1 £)ieu 6 Ngh! d!nh so

127/2007/N£)-CP nqay 1/8/2007 cua Chfnh phu quy d!nh chi tiet thi hann mot

so dieu cua Lu~t Tleu chuan va Quy chuan ky thuat.

TCVN 8-24 : 2002

3

_ _? _,

TIEU CHUAN QUaC GIA TCVN 8-24 : 2002

Ban ve ky thu~t - Nguyen t~c chung ve bi~u dien

Phan 24: Net ve tren ban ve cc khi

Technical drawings - General principles of presentation _

Part 24: Lines on mechanical engineering drawings

1 Pharn vi ap dl,,mg

Tieu chuan nay quy dinh quy tac chung va quy LlOCco ban cho cac I09i net ve tren ban ve co khf.

2 Tleu chuin trich dftn

TCVN 8-20:2002 (ISO 128-20: 1996) Ban ve ky thuat - Nguyen tac chung ve bieu diE~n- Phan 20: Cacquy LlOCCOban doi vOi cac net ve.

TCVN 8-22:2002 (ISO 128-22: 1996) Ban ve ky thuat - Nguyen tac chung ve bieu dien - Phan 22: Cac

quy LlOCCOban va ap dl,lng doi vOi dLlong dan va dLlong chu dan.

ISO 128-30: Technical drawings - General principles of presentation - Part 30 : Basic conventions for

lines (Ban ve ky thuat - Nguyen tac chung ve bieu dien - Phan 30: Quy LlocCOban ve hinh chieu.)

ISO 128-40: Technical drawings - General principles of presentation - Part 40 : Basic conventions for

cuts and sections (Ban ve ky thuat - Nguyen tac chung ve bieu dien - Phan 40: Quy LlOCCOban ve matcat va hinh cat).

5

ISO 128-50: Technical drawings - General principles of presentation - Part 40 : Basic conventions for

representing areas on cuts and sections (Ban ve ky thuat - Nguyen tac chung ve bieu dien - Phan 50:

Quy LlOCCOban ve cac khu vl/c bieu dien tren m~t cat va hinh cat).

ISO 129:1985 Technical drawings - General principles, definitions, methods of execution and speccial

indications (Ban ve ky thu~t - Ghi kfch thLloC- Nguyen tac chung, cac dinh nghTa, phLlong phap thl/chi~n va cac chi dan d~c bi~t).

ISO 2203:1973 Technical drawings - Conventional representation of gears (Ban ve ky thu~t - Bieudien quy LlOCbanh rang).

ISO 3040:1990 Technical drawings - Dimensioning and tolerancing - Cones (Ban ve ky thu~t - Ghikfch thLlOCva ghi dung sai - Phan til con).

TCVN 8-24 : 2002

ISO 5261 :1995 Technical drawings - Simplified representation of bars and profile sections (Ban ve kythuat - Bieu dien don gian hoa cac thanh va mat cat ngang).

ISO 6410-1:1993 Technical drawings - Screw threads and threaded parts - Part 1: Generalconventions (Ban ve ky thuat - Ren va cac chi tiet co ren - Phan 1: Cac quy udCchung).

ISO 6428:1982 Technical drawings - Requiremnets for microcopying (Ban ve ky thuat - Cac yeu caudoi voi viec microcopy).ISO 10135:1994 Technical drawings - Simplified representation of moulded, cast and forged parts (Banve ky thuat - Bieu dien dan gian hoa cac chi tiet due va ren),

ISO 10578:1992 Technical drawings - Tolerancing of orientation and location - Projected tolerancezone (Ban ve ky thuat - Ghi dung sai hironq va v] trf - Mien dung sai chieu),

3 Nguyen tac chungCac loai net ve co ban, ten 99i va cac kfch thiroc cOng nhir cac quy tac chung de ve cac loai net dU<;1c

quy dinh trong TCVN 8-20 : 2002.

Cac yeu cau doi vdi viec microcopy dU<;1cquy dinh trong ISO 6428.

4 Cac loal net va va ap dlJng cua chunq

Phan thu'nhat cua so hleu net ve trong bang 1 la so hieu cua loai net co ban phu hop vdi TCVN 8-20:2002.

Bang 1 - Cac loai net va ap dlJng

Trich danNet va

So Tfm gQi va Ap dlJng theohieu bi~u di~n tieu chu~n01.1 Net lien manh .1 Giao tuven tuang tuong -

.2 Duong kfch thudC ISO 129

.3 Duong giong ISO 129

.4 Duong dan va duong chu dan TCVN128-22

.5 Duong gach - gach mat cat ISO 128-50

.6 Duong bao cua mat cat chap ISO 128-40

.7 Duonq tam ngan -

.8 Duong chan ren ISO 6410-1

.9 chi dan goc va dau cua duong kfch thUdC ISO 129

.10 Duonq cheo de chi phan mat ph~ng -

.11 Duong uon tren phoi va chi tiet gia cong -

.12 Duong khung bao phan hlnh trfch -

.13 Duong de chi cac phan tLtlap lai -

.14 Duong chuyen tiep sang mat con ISO 3040

.15 Vi trf cua vat lieu nhieu Idp -

.16 Duong th~ng chieu -

.17 Duonq ludi -Net IU<;1nsong .18 Vu tien ve bang tay de bieu dien gidi h<;lncua -

~hlnh chieu rieng phan, ho~c cho cat Ila, m~t catho~c hlnh cat, neu gidi h<;lnnay khOng phai laduong truc doi xLtnghoac duong tam a)

6

TCVN 8·24 : 2002

Bang 1 (tiep theo)

Net ve Trlch d&n56 Ten gQi theo theohi~u va bi~udi~n tieu chu~n tieu chu~n01.1 Net dich dac .19 Bieu dien giClihan cua hinh chieu riemg phan, hoac cho -

~cat lia, mat cat hoac hinh cat, neu giCli han nay khOngphal la duong true doi x(/ng hoac duong tam a)

01.2 Net lien d~m .1 Canh thay ISO 128-30.2 Duong bao thay ISO 128-30.3 Duong dlnh ren ISO 6410-1.4 Duong giClihan chieu dai doan ren day ISO 6410-1.5 Duong bieu dien chfnh tren cac sa do, ban do, luu do -.6 Duong h$ thong (khung, dan trong ket cau thep) ISO 5261.7 Duong bieu dien m~t phan khuon tren hinh cbieu ISO 10135.8 Than mOi ten d hinh cat va mat cat ISO 128-40

02.1 Net dltt manh .1 Canh khuat ISO 128-30-------------------- .2 Duong bao khuat ISO 128-30

02.2 Net dltt d~m .1 Khu vue cho phep can xiJ Iy be mat, VI du xiJ Iy nhlet ---------

04.1 Net g~ch dai - .1 Duong tam -cham - manh .2 Duong true doi x(/ng -- _._._._._._._._._ .3 Vong tron chia cua banh rang ISO 2203

.4 Vong tron di qua tam cac 10phan bo deu -04.2 Net g~ch dai - .1 Chi khu vl!C can xiJ Iy be m~t, VI dl,JxiJ Iy nhi$t -

cham - d~m-.-._.-. .2 V! trl cLlam<)tph~ng cat ISO 128-40

05.1 Net g~ch dai - .1 Duong bao cLla chi tiet lien ke -hai cham - .2 V! trl tClih~n cLlacac chi tiet chuyen d9n9 -manh

.3 Duong tr9ng tam -_ .._ .._ .._ .._ .._ .._ .._ ..

.4 Duong bao ban dau truClckhi t~o hinh -

.5 Cac chi tiet d<)tphla truClcm~t ph~ng cat -

.6 Duong bao cLla ph~m vi ho~t d9n9 -

.7 Duong bao cLla phan gia cong tinh ben trong phoi ISO 1035

.8 Khung cLla vung khu vl!c ghi d~c Hnh ky thu~t -

.9 Mien dung sai chieu ISO 10578a) chi nen dung m9t lo~i net ve tren m9t ban ve

7

Cac VI dl,Jap dl,Jngda neu d phl,Jll,JcA.

Kfch thLfoc tfnh bang milirnet

TCVN 8-24 : 2002

5 Chieu rQng net va cac nhorn net

Tren ban ve co khf thLfong dung hai I09i chieu r(>ngnet. Ty so giCi'acac chieu r(>ngnen 1131:2.

Cac nh6m net dLf<;1Cquy dinh nhu trong bang 2.

Bang 2 - cac nhorn net

Chieu r9ng net

Nhom net lrng vdi sohi~u01.2 - 02.2 - 04.2 01.1 - 02.1 - 04.1 - 05.1

0,25 0,25 0,13

0,35 0,35 0,18

0,5a 0,5 0,25

0,7a 0,7 0,35

1 1 0,5

1,4 1,4 0,7

2 2 1

a Nh6m net LfU tlen

Chieu r(>ngnet va nh6m net nen chon theo I09i, kfch thiroc va ty I~ cua ban ve va chon theo cac yeu

C3Udoi voi vi~c microcopy va / hoac doi voi cac phLfongphap nhan ban khac,

8

TCVN 8-24 : 2002

Phu luc A(tham khao)

Vi dl) Slt dl)ngBang A.1 dira ra cac VIdu sU' dunq cac loai net khac nhau (fng vdi s6 hieu tnch dan da cho trong bang 1.

Cac hinh ve dLl~cbieu dien a g6c chieu thCt nhat. Can hieu rang cOngc6 the sU'dl,lngg6c chieu thCt ba.

Bang A.1 - Vi dl:! Slt dl:!ng

01.1 Net lien rnanh

01.1.1..1

L _1

Giao tuyen tllc1ngtll<;1ng ~uT~"". ,--I.1J·1 \1.l ..I

-r- 01.1

01.1.2 £)llang kfch thlle'jc

Vr- V°1.1'-~

01.1.3 £)llang gi6ng

8 g 1:,101.1.4 £)llang dan va dllang chu dan EfOtl U .4K~1.101.1.5 £)llang g<;lch- qach mat cat

~Ol19

TCVN 8-24 : 2002

(Tiep thea bang A.1)

01.1.6 £)uong baa cua mat cat chap

01.1.7 £)uong tam ngan

IL...-_~1101.1.8 £)uong chan ren

01.1.9 Goc va dau cua duong kfch thiroc

01.1

~lo~101.1.10 £)uong cheo d~ chi phan mat ph~ng

.-- __ -._ /01.1

"V"'I--'-'-'~

,,---__,-

::><.,'__._.- . .-><

01.1.11 £)uong ucn tren phoi va chi tiet gia conq

01.1

/[ I· I I

10

TCVN 8-24 : 2002

01.1.12 Duong khung bao phan hinh trfch

01.1

01.1.13 Duong a~ chi cac phan tLt I~p lai, vf du auong kfnh chan rang

01.1.14 Duong chuy~n tiep sang mat con

01.1.15 Vi trf cua v~t litilu nhieu lop, vf dl,Jcac tam thep cua bien the

01.1.16 Duong th~ng chieu

01.1

01.1

11

TCVN 8-24 : 2002

01.1.17 D110ng 111(jj

01.1/

/"- I"- I--~

01.1.18 Net 111<;lns6ng

01.1.19 Net dich dac

01.2 Net lien d~m

01.2.1 Canh thay

If! rOl2~I ~

01.2.2 D110ng bao thay

01.2

01.2.3 Dl10ng dlnh ren

f-'fF3-4~ ~1~

12

TCVN 8-24 : 2002

01.2.4 Giai han chieu dai cua doan ren day

01.2.5 8110ngbi~u dien chfnh tren cac sa do, ban do, IlIUdo

01.2.6 8110ngh~ thong (khung, dan trong ket cau thep)

01.2.7 8110ngbi~u dien mat phan khu6n tren hinh chieu

01.2/f.-·lf·:t- -1

~01.2

i"~ -I.---'

KI--"" '""" o

<>Ll"INN

22501750 , 3000 300020000

13

TCVN 8-24 : 2002

01.2.8 Than mOi ten a hlnh ci3t va mat cat

AA-A B-B

•~BA

02.1 NtHdltt - rnanh

02.1.1 Canh khuat

t il

02.1.2 Duong bao khuat

02.1

02.2 Net dltt - d~m

02.2.1 Chi dan xLt Iy be mat cho phep, VIdu xLt Iy nhiet

14

04.1.1

04.1 Net g~chdid· cham· manh

Duong tam

04.1.2 Duong true doi xung

04.1.3 Vong tron chia cua banh r~ng

04.1.4 Vong tron di qua tam cac 10 phan bo deu

04.2 Net g~chdai • cham . d~m

04.2.1 Chi khu vue gidi han (Xl! Iy nhiet, khu vl!C do)

04.2

TCVN 8-24 : 2002

15

TCVN 8-24 : 2002

. 8-B

04.2.2 Vi trf cua mat ph~ng cat

B~4.2 A-A

A B

05.1 Net 9Cilch dai - hai cham - rnanh

05.1.1 DUdng baa cua cac chi tiet Ian can

05.1.2 Vi trf tC1ihan cua chi tiet chuyen d('>ng

05.1.3 DUdng tronq tam

05.1.4 DUdng baa ban dau tnrcc khi tao hinh

r----5)05.1

{·_·_·33::~

16

TCVN 8-24 : 2002

05.1.5 Cac chi tiet d~t phfa tnroc mat ph~ng cat

05.1

05.1.6 Duong bao ella pharn vi heat d(lng

05.1

05.1.7 Duong bao ella phan gia eong tinh ben trong phoi

05.1.8 Khung ella vung / khu vue ghi d~e tfnh ky thuat V:J. ,

"3-

05.1.9 Mien dung sai chieu

17