{"id":5598,"date":"2025-12-22T08:59:44","date_gmt":"2025-12-22T08:59:44","guid":{"rendered":"https:\/\/korea-transmission.com\/?p=5598"},"modified":"2025-12-22T08:59:44","modified_gmt":"2025-12-22T08:59:44","slug":"gb-944-1-1985-cross-recesses-for-screws-standard","status":"publish","type":"post","link":"https:\/\/korea-transmission.com\/vi\/blog\/gb-944-1-1985-cross-recesses-for-screws-standard\/","title":{"rendered":"GB 944.1-1985: Ti\u00eau chu\u1ea9n r\u00e3nh ch\u1eef th\u1eadp cho v\u00edt"},"content":{"rendered":"
\n

GB 944.1-1985: Ti\u00eau chu\u1ea9n r\u00e3nh ch\u1eef th\u1eadp cho v\u00edt<\/h1>\n

Gi\u1edbi thi\u1ec7u<\/h2>\n

Ti\u00eau chu\u1ea9n GB 944.1-1985 quy \u0111\u1ecbnh k\u00edch th\u01b0\u1edbc v\u00e0 y\u00eau c\u1ea7u \u0111\u1ed1i v\u1edbi c\u00e1c r\u00e3nh ch\u1eef th\u1eadp \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong v\u00edt, bao g\u1ed3m c\u1ea3 c\u00e1c thi\u1ebft k\u1ebf ki\u1ec3u Phillips. C\u00e1c r\u00e3nh ch\u1eef th\u1eadp r\u1ea5t c\u1ea7n thi\u1ebft trong c\u00e1c \u1ee9ng d\u1ee5ng si\u1ebft ch\u1eb7t, gi\u00fap truy\u1ec1n m\u00f4-men xo\u1eafn t\u1ed1t h\u01a1n v\u00e0 gi\u1ea3m hi\u1ec7n t\u01b0\u1ee3ng tr\u01b0\u1ee3t ren so v\u1edbi c\u00e1c \u0111\u1ea7u v\u00edt c\u00f3 r\u00e3nh d\u1ecdc. Ch\u00fang \u0111\u01b0\u1ee3c \u1ee9ng d\u1ee5ng r\u1ed9ng r\u00e3i trong c\u00e1c ng\u00e0nh c\u00f4ng nghi\u1ec7p nh\u01b0 \u00f4 t\u00f4, \u0111i\u1ec7n t\u1eed v\u00e0 s\u1ea3n xu\u1ea5t m\u00e1y m\u00f3c.<\/p>\n

Ti\u00eau chu\u1ea9n GB 944.1-1985 \u0111\u1ecbnh ngh\u0129a hai lo\u1ea1i ch\u00ednh: r\u00e3nh ch\u1eef th\u1eadp ki\u1ec3u H v\u00e0 ki\u1ec3u Z, ph\u00f9 h\u1ee3p v\u1edbi nhi\u1ec1u k\u00edch c\u1ee1 v\u00edt t\u1eeb r\u00e3nh s\u1ed1 0 \u0111\u1ebfn s\u1ed1 4. Ti\u00eau chu\u1ea9n n\u00e0y \u0111\u1ea3m b\u1ea3o t\u00ednh t\u01b0\u01a1ng th\u00edch gi\u1eefa v\u00edt v\u00e0 tua v\u00edt, gi\u1ea3m thi\u1ec3u l\u1ed7i l\u1eafp r\u00e1p v\u00e0 n\u00e2ng cao \u0111\u1ed9 tin c\u1eady c\u1ee7a s\u1ea3n ph\u1ea9m.<\/p>\n

Ti\u00eau chu\u1ea9n n\u00e0y \u00e1p d\u1ee5ng cho v\u00edt m\u00e1y, v\u00edt t\u1ef1 ren v\u00e0 v\u00edt g\u1ed7, v\u1edbi k\u00edch th\u01b0\u1edbc \u0111\u01b0\u1ee3c cung c\u1ea5p d\u01b0\u1edbi d\u1ea1ng gi\u00e1 tr\u1ecb l\u00fd thuy\u1ebft cho vi\u1ec7c ch\u1ebf t\u1ea1o khu\u00f4n. S\u1ea3n ph\u1ea9m th\u1ef1c t\u1ebf kh\u00f4ng \u0111\u01b0\u1ee3c ki\u1ec3m tra d\u1ef1a tr\u00ean c\u00e1c gi\u00e1 tr\u1ecb ch\u00ednh x\u00e1c n\u00e0y, nh\u01b0ng ch\u00fang h\u01b0\u1edbng d\u1eabn qu\u00e1 tr\u00ecnh s\u1ea3n xu\u1ea5t \u0111\u1ec3 \u0111\u1ea1t \u0111\u01b0\u1ee3c hi\u1ec7u su\u1ea5t nh\u1ea5t qu\u00e1n.<\/p>\n

T\u1ed5ng quan v\u1ec1 ti\u00eau chu\u1ea9n GB 944.1-1985<\/h2>\n

Ti\u00eau chu\u1ea9n GB 944.1-1985, \u0111\u01b0\u1ee3c C\u1ee5c Qu\u1ea3n l\u00fd Ti\u00eau chu\u1ea9n h\u00f3a Trung Qu\u1ed1c ban h\u00e0nh n\u0103m 1985, ch\u01b0a tr\u1ea3i qua nhi\u1ec1u l\u1ea7n s\u1eeda \u0111\u1ed5i l\u1edbn v\u00e0 v\u1eabn l\u00e0 t\u00e0i li\u1ec7u tham kh\u1ea3o cho c\u00e1c th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt c\u1ee7a r\u00e3nh ch\u1eef th\u1eadp. Ti\u00eau chu\u1ea9n n\u00e0y ph\u00f9 h\u1ee3p v\u1edbi c\u00e1c ti\u00eau chu\u1ea9n qu\u1ed1c t\u1ebf nh\u01b0 ISO 4757:1983, c\u0169ng \u0111\u1ecbnh ngh\u0129a c\u00e1c lo\u1ea1i r\u00e3nh ch\u1eef H v\u00e0 ch\u1eef Z.<\/p>\n

Ph\u1ea1m vi t\u00e0i li\u1ec7u bao g\u1ed3m k\u00edch th\u01b0\u1edbc r\u00e3nh v\u00edt, k\u00edch th\u01b0\u1edbc \u0111\u1ea7u th\u01b0\u1edbc \u0111o \u0111\u1ec3 ki\u1ec3m tra v\u00e0 ghi ch\u00fa v\u1ec1 \u1ee9ng d\u1ee5ng. T\u00e0i li\u1ec7u n\u00e0y bao g\u1ed3m c\u00e1c r\u00e3nh t\u1eeb 0 \u0111\u1ebfn 4, t\u1eadp trung v\u00e0o c\u00e1c th\u00f4ng s\u1ed1 nh\u01b0 chi\u1ec1u r\u1ed9ng, chi\u1ec1u s\u00e2u v\u00e0 g\u00f3c \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o s\u1ef1 \u0103n kh\u1edbp ch\u00ednh x\u00e1c v\u1edbi tua v\u00edt.<\/p>\n

N\u1ed9i dung ch\u00ednh bao g\u1ed3m c\u00e1c b\u1ea3ng chi ti\u1ebft v\u1ec1 c\u00e1c lo\u1ea1i r\u00e3nh ch\u1eef H v\u00e0 ch\u1eef Z, c\u00f9ng v\u1edbi k\u00edch th\u01b0\u1edbc th\u01b0\u1edbc \u0111o \u0111\u1ec3 ki\u1ec3m so\u00e1t ch\u1ea5t l\u01b0\u1ee3ng.<\/p>\n

Nguy\u00ean t\u1eafc c\u01a1 b\u1ea3n v\u1ec1 r\u00e3nh ch\u1eef th\u1eadp<\/h2>\n

C\u00e1c r\u00e3nh ch\u1eef th\u1eadp \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf v\u1edbi c\u00e1c khe giao nhau t\u1ea1o th\u00e0nh h\u00ecnh ch\u1eef th\u1eadp, cho ph\u00e9p c\u1ea7m n\u1eafm t\u1ed1t h\u01a1n v\u00e0 truy\u1ec1n l\u1ef1c xo\u1eafn hi\u1ec7u qu\u1ea3 h\u01a1n. Lo\u1ea1i H c\u00f3 thi\u1ebft k\u1ebf Phillips ti\u00eau chu\u1ea9n v\u1edbi c\u00e1c c\u00e1nh loe ra, trong khi lo\u1ea1i Z (Pozidriv) c\u00f3 th\u00eam c\u00e1c g\u1edd \u0111\u1ec3 t\u0103ng c\u01b0\u1eddng kh\u1ea3 n\u0103ng \u0103n kh\u1edbp khi v\u1eb7n, gi\u1ea3m hi\u1ec7n t\u01b0\u1ee3ng tr\u01b0\u1ee3t.<\/p>\n

Nguy\u00ean t\u1eafc n\u00e0y li\u00ean quan \u0111\u1ebfn h\u00ecnh h\u1ecdc ch\u00ednh x\u00e1c \u0111\u1ec3 c\u00e2n b\u1eb1ng \u0111\u1ed9 b\u1ec1n, kh\u1ea3 n\u0103ng ch\u1ebf t\u1ea1o v\u00e0 hi\u1ec7u su\u1ea5t. C\u00e1c th\u00f4ng s\u1ed1 ch\u00ednh bao g\u1ed3m chi\u1ec1u r\u1ed9ng khe (b), \u0111\u1ed9 s\u00e2u xuy\u00ean th\u1ea5u (e, f), s\u1ea3i c\u00e1nh (g), b\u00e1n k\u00ednh (r) v\u00e0 g\u00f3c (\u03b1, \u03b2) \u0111\u1ec3 t\u1ed1i \u01b0u h\u00f3a s\u1ef1 ph\u00e2n b\u1ed1 l\u1ef1c.<\/p>\n

Th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt cho c\u00e1c r\u00e3nh ch\u1eef th\u1eadp ki\u1ec3u H<\/h2>\n

R\u00e3nh ch\u1eef H \u0111\u01b0\u1ee3c quy \u0111\u1ecbnh cho c\u00e1c \u1ee9ng d\u1ee5ng ti\u00eau chu\u1ea9n. K\u00edch th\u01b0\u1edbc ch\u1ec9 mang t\u00ednh l\u00fd thuy\u1ebft cho thi\u1ebft k\u1ebf khu\u00f4n.<\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Tham s\u1ed1<\/th>\n0<\/th>\n1<\/th>\n2<\/th>\n3<\/th>\n4<\/th>\n<\/tr>\n<\/thead>\n
b Danh ngh\u0129a = T\u1ed1i \u0111a<\/td>\nb<\/td>\n0.61<\/td>\n0.97<\/td>\n1.47<\/td>\n2.41<\/td>\n3.48<\/td>\n<\/tr>\n
T\u1ed1i thi\u1ec3u<\/td>\n0.58<\/td>\n0.94<\/td>\n1.44<\/td>\n2.38<\/td>\n3.45<\/td>\n<\/tr>\n
e Min<\/td>\ne<\/td>\n0.26<\/td>\n0.41<\/td>\n0.79<\/td>\n1.98<\/td>\n2.39<\/td>\n<\/tr>\n
T\u1ed1i \u0111a<\/td>\n0.36<\/td>\n0.46<\/td>\n0.84<\/td>\n2.03<\/td>\n2.44<\/td>\n<\/tr>\n
g Danh ngh\u0129a = T\u1ed1i thi\u1ec3u<\/td>\ng<\/td>\n0.81<\/td>\n1.27<\/td>\n2.29<\/td>\n3.81<\/td>\n5.08<\/td>\n<\/tr>\n
T\u1ed1i \u0111a<\/td>\n0.86<\/td>\n1.32<\/td>\n2.34<\/td>\n3.86<\/td>\n5.13<\/td>\n<\/tr>\n
f Min<\/td>\nf<\/td>\n0.31<\/td>\n0.51<\/td>\n0.66<\/td>\n0.79<\/td>\n1.19<\/td>\n<\/tr>\n
T\u1ed1i \u0111a<\/td>\n0.36<\/td>\n0.56<\/td>\n0.74<\/td>\n0.86<\/td>\n1.27<\/td>\n<\/tr>\n
r Danh ngh\u0129a<\/td>\nr<\/td>\n0.3<\/td>\n0.5<\/td>\n0.6<\/td>\n0.8<\/td>\n1<\/td>\n<\/tr>\n
Tham chi\u1ebfu t1<\/td>\nt1<\/td>\n0.22<\/td>\n0.34<\/td>\n0.61<\/td>\n1.01<\/td>\n1.35<\/td>\n<\/tr>\n
\u03b1 Danh ngh\u0129a = T\u1ed1i \u0111a\u2460<\/sup><\/td>\n\u03b1<\/td>\n\/<\/td>\n138\u00b0<\/td>\n140\u00b0<\/td>\n146\u00b0<\/td>\n153\u00b0<\/td>\n<\/tr>\n
T\u1ed1i thi\u1ec3u\u2460<\/sup><\/td>\n\/<\/td>\n137\u00b045\u2032<\/td>\n139\u00b045\u2032<\/td>\n145\u00b045\u2032<\/td>\n152\u00b045\u2032<\/td>\n<\/tr>\n
\u03b2 Danh ngh\u0129a = T\u1ed1i thi\u1ec3u<\/td>\n\u03b2<\/td>\n7\u00b0<\/td>\n7\u00b0<\/td>\n5\u00b045\u2032<\/td>\n5\u00b045\u2032<\/td>\n7\u00b0<\/td>\n<\/tr>\n
T\u1ed1i \u0111a<\/td>\n7\u00b015\u2032<\/td>\n7\u00b015\u2032<\/td>\n6\u00b0<\/td>\n6\u00b0<\/td>\n7\u00b015\u2032<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u2460 \u0110\u1ed1i v\u1edbi r\u00e3nh s\u1ed1 0, \u03b1 \u0111\u01b0\u1ee3c thay th\u1ebf b\u1eb1ng r(min)=0,25mm, r(max)=0,36mm. T\u1ea5t c\u1ea3 c\u00e1c k\u00edch th\u01b0\u1edbc \u0111\u1ec1u t\u00ednh b\u1eb1ng mm v\u00e0 l\u00e0 k\u00edch th\u01b0\u1edbc l\u00fd thuy\u1ebft d\u00f9ng cho khu\u00f4n.<\/p>\n

Th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt cho c\u00e1c r\u00e3nh ch\u1eef th\u1eadp ki\u1ec3u Z<\/h2>\n

Lo\u1ea1i Z mang l\u1ea1i hi\u1ec7u su\u1ea5t \u0111\u01b0\u1ee3c c\u1ea3i thi\u1ec7n v\u1edbi c\u00e1c t\u00ednh n\u0103ng b\u1ed5 sung \u0111\u1ec3 ng\u0103n ng\u1eeba hi\u1ec7n t\u01b0\u1ee3ng tr\u01b0\u1ee3t cam.<\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Tham s\u1ed1<\/th>\n0<\/th>\n1<\/th>\n2<\/th>\n3<\/th>\n4<\/th>\n<\/tr>\n<\/thead>\n
b Danh ngh\u0129a = T\u1ed1i \u0111a<\/td>\nb<\/td>\n0.76<\/td>\n1.27<\/td>\n1.83<\/td>\n2.72<\/td>\n3.96<\/td>\n<\/tr>\n
T\u1ed1i thi\u1ec3u<\/td>\n0.71<\/td>\n1.22<\/td>\n1.78<\/td>\n2.67<\/td>\n3.91<\/td>\n<\/tr>\n
f Danh ngh\u0129a = T\u1ed1i \u0111a<\/td>\nf<\/td>\n0.48<\/td>\n0.74<\/td>\n1.03<\/td>\n1.42<\/td>\n2.16<\/td>\n<\/tr>\n
T\u1ed1i thi\u1ec3u<\/td>\n0.455<\/td>\n0.715<\/td>\n1.005<\/td>\n1.395<\/td>\n2.135<\/td>\n<\/tr>\n
g Danh ngh\u0129a = T\u1ed1i \u0111a<\/td>\ng<\/td>\n0.86<\/td>\n1.32<\/td>\n2.34<\/td>\n3.86<\/td>\n5.08<\/td>\n<\/tr>\n
T\u1ed1i thi\u1ec3u<\/td>\n0.81<\/td>\n1.27<\/td>\n2.29<\/td>\n3.81<\/td>\n5.03<\/td>\n<\/tr>\n
r1 T\u1ed1i \u0111a<\/td>\nr1<\/td>\n0.3<\/td>\n0.3<\/td>\n0.38<\/td>\n0.51<\/td>\n0.64<\/td>\n<\/tr>\n
r2 T\u1ed1i \u0111a<\/td>\nr2<\/td>\n0.1<\/td>\n0.13<\/td>\n0.15<\/td>\n0.25<\/td>\n0.38<\/td>\n<\/tr>\n
j Max<\/td>\nj<\/td>\n0.13<\/td>\n0.15<\/td>\n0.15<\/td>\n0.2<\/td>\n0.2<\/td>\n<\/tr>\n
\u03b1 Danh ngh\u0129a = T\u1ed1i thi\u1ec3u<\/td>\n\u03b1<\/td>\n7\u00b0<\/td>\n7\u00b0<\/td>\n5\u00b045\u2032<\/td>\n5\u00b045\u2032<\/td>\n7\u00b0<\/td>\n<\/tr>\n
T\u1ed1i \u0111a<\/td>\n7\u00b015\u2032<\/td>\n7\u00b015\u2032<\/td>\n6\u00b0<\/td>\n6\u00b0<\/td>\n7\u00b015\u2032<\/td>\n<\/tr>\n
\u03b2 Danh ngh\u0129a = T\u1ed1i \u0111a<\/td>\n\u03b2<\/td>\n7\u00b045\u2032<\/td>\n7\u00b045\u2032<\/td>\n6\u00b020\u2032<\/td>\n6\u00b020\u2032<\/td>\n7\u00b045\u2032<\/td>\n<\/tr>\n
T\u1ed1i thi\u1ec3u<\/td>\n7\u00b030\u2032<\/td>\n7\u00b030\u2032<\/td>\n6\u00b05\u2032<\/td>\n6\u00b05\u2032<\/td>\n7\u00b030\u2032<\/td>\n<\/tr>\n
\u03b3 Danh ngh\u0129a = T\u1ed1i \u0111a<\/td>\n\u03b3<\/td>\n4\u00b023\u2032<\/td>\n4\u00b023\u2032<\/td>\n3\u00b0<\/td>\n3\u00b0<\/td>\n4\u00b023\u2032<\/td>\n<\/tr>\n
T\u1ed1i thi\u1ec3u<\/td>\n4\u00b08\u2032<\/td>\n4\u00b08\u2032<\/td>\n2\u00b045\u2032<\/td>\n2\u00b045\u2032<\/td>\n4\u00b08\u2032<\/td>\n<\/tr>\n
\u03b4 Danh ngh\u0129a = T\u1ed1i \u0111a<\/td>\n\u03b4<\/td>\n46\u00b0<\/td>\n46\u00b0<\/td>\n46\u00b0<\/td>\n56\u00b015\u2032<\/td>\n56\u00b015\u2032<\/td>\n<\/tr>\n
T\u1ed1i thi\u1ec3u<\/td>\n45\u00b053\u2032<\/td>\n45\u00b053\u2032<\/td>\n45\u00b053\u2032<\/td>\n56\u00b08\u2032<\/td>\n56\u00b08\u2032<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

T\u1ea5t c\u1ea3 c\u00e1c k\u00edch th\u01b0\u1edbc \u0111\u1ec1u t\u00ednh b\u1eb1ng mm v\u00e0 l\u00e0 k\u00edch th\u01b0\u1edbc l\u00fd thuy\u1ebft d\u00f9ng cho khu\u00f4n m\u1eabu.<\/p>\n

K\u00edch th\u01b0\u1edbc \u0111\u1ea7u \u0111o r\u00e3nh ch\u1eef H<\/h2>\n

C\u00e1c d\u1ee5ng c\u1ee5 \u0111o \u0111\u1ea3m b\u1ea3o s\u1ef1 ph\u00f9 h\u1ee3p c\u1ee7a c\u00e1c r\u00e3nh trong qu\u00e1 tr\u00ecnh ki\u1ec3m tra ch\u1ea5t l\u01b0\u1ee3ng.<\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Tham s\u1ed1<\/th>\n0<\/th>\n1<\/th>\n2<\/th>\n3<\/th>\n4<\/th>\n<\/tr>\n<\/thead>\n
b Danh ngh\u0129a = T\u1ed1i \u0111a<\/td>\nb<\/td>\n0.64<\/td>\n1.001<\/td>\n1.539<\/td>\n2.497<\/td>\n3.574<\/td>\n<\/tr>\n
T\u1ed1i thi\u1ec3u<\/td>\n0.615<\/td>\n0.976<\/td>\n1.514<\/td>\n2.472<\/td>\n3.549<\/td>\n<\/tr>\n
g Danh ngh\u0129a = T\u1ed1i thi\u1ec3u<\/td>\ng<\/td>\n0.813<\/td>\n1.27<\/td>\n2.286<\/td>\n3.81<\/td>\n5.08<\/td>\n<\/tr>\n
T\u1ed1i \u0111a<\/td>\n0.838<\/td>\n1.295<\/td>\n2.311<\/td>\n3.835<\/td>\n5.105<\/td>\n<\/tr>\n
d Danh ngh\u0129a = T\u1ed1i thi\u1ec3u<\/td>\nd<\/td>\n0.25<\/td>\n0.38<\/td>\n0.38<\/td>\n0.38<\/td>\n0.38<\/td>\n<\/tr>\n
T\u1ed1i \u0111a<\/td>\n0.38<\/td>\n0.51<\/td>\n0.51<\/td>\n0.51<\/td>\n0.51<\/td>\n<\/tr>\n
e Danh ngh\u0129a = T\u1ed1i \u0111a<\/td>\ne<\/td>\n0.315<\/td>\n0.513<\/td>\n1.102<\/td>\n2.098<\/td>\n2.738<\/td>\n<\/tr>\n
T\u1ed1i thi\u1ec3u<\/td>\n0.29<\/td>\n0.488<\/td>\n1.077<\/td>\n2.073<\/td>\n2.713<\/td>\n<\/tr>\n
f Danh ngh\u0129a = T\u1ed1i \u0111a<\/td>\nf<\/td>\n0.31<\/td>\n0.51<\/td>\n0.64<\/td>\n0.79<\/td>\n1.12<\/td>\n<\/tr>\n
T\u1ed1i thi\u1ec3u<\/td>\n0.25<\/td>\n0.45<\/td>\n0.58<\/td>\n0.73<\/td>\n1.06<\/td>\n<\/tr>\n
L Min<\/td>\nL<\/td>\n3.17<\/td>\n3.17<\/td>\n4.78<\/td>\n7.14<\/td>\n8.74<\/td>\n<\/tr>\n
\u03b1 Danh ngh\u0129a = T\u1ed1i thi\u1ec3u\u2460<\/sup><\/td>\n\u03b1<\/td>\n\/<\/td>\n138\u00b0<\/td>\n140\u00b0<\/td>\n146\u00b0<\/td>\n153\u00b0<\/td>\n<\/tr>\n
T\u1ed1i \u0111a\u2460<\/sup><\/td>\n\/<\/td>\n138\u00b015\u2032<\/td>\n140\u00b015\u2032<\/td>\n146\u00b015\u2032<\/td>\n153\u00b015\u2032<\/td>\n<\/tr>\n
\u03b2 Danh ngh\u0129a = T\u1ed1i thi\u1ec3u<\/td>\n\u03b2<\/td>\n7\u00b0<\/td>\n7\u00b0<\/td>\n5\u00b045\u2032<\/td>\n5\u00b045\u2032<\/td>\n7\u00b0<\/td>\n<\/tr>\n
T\u1ed1i \u0111a<\/td>\n6\u00b045\u2032<\/td>\n6\u00b045\u2032<\/td>\n5\u00b030\u2032<\/td>\n5\u00b030\u2032<\/td>\n6\u00b045\u2032<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u2460 \u0110\u1ed1i v\u1edbi r\u00e3nh s\u1ed1 0, \u03b1 \u0111\u01b0\u1ee3c thay th\u1ebf b\u1eb1ng r = 0,25 \u00b1 0,025 mm. T\u1ea5t c\u1ea3 c\u00e1c k\u00edch th\u01b0\u1edbc \u0111\u1ec1u t\u00ednh b\u1eb1ng mm.<\/p>\n

\u1ea2nh h\u01b0\u1edfng c\u1ee7a ti\u00eau chu\u1ea9n GB 944.1-1985 \u0111\u1ed1i v\u1edbi ng\u00e0nh c\u00f4ng nghi\u1ec7p<\/h2>\n

Ti\u00eau chu\u1ea9n n\u00e0y chu\u1ea9n h\u00f3a c\u00e1c thi\u1ebft k\u1ebf r\u00e3nh ch\u1eef th\u1eadp, h\u1ed7 tr\u1ee3 th\u01b0\u01a1ng m\u1ea1i to\u00e0n c\u1ea7u v\u00e0 kh\u1ea3 n\u0103ng t\u01b0\u01a1ng th\u00edch. N\u00f3 t\u00e1c \u0111\u1ed9ng \u0111\u1ebfn ki\u1ec3m so\u00e1t ch\u1ea5t l\u01b0\u1ee3ng b\u1eb1ng c\u00e1ch cung c\u1ea5p c\u00e1c ti\u00eau chu\u1ea9n cho s\u1ea3n xu\u1ea5t, gi\u1ea3m thi\u1ec3u l\u1ed7i trong d\u00e2y chuy\u1ec1n l\u1eafp r\u00e1p. Trong \u1ee9ng d\u1ee5ng \u00f4 t\u00f4, n\u00f3 \u0111\u1ea3m b\u1ea3o \u0111\u1ed9 ch\u1eafc ch\u1eafn khi si\u1ebft ch\u1eb7t; trong l\u0129nh v\u1ef1c \u0111i\u1ec7n t\u1eed, n\u00f3 h\u1ed7 tr\u1ee3 c\u00e1c v\u00edt si\u00eau nh\u1ecf v\u1edbi kh\u1ea3 n\u0103ng ki\u1ec3m so\u00e1t m\u00f4-men xo\u1eafn ch\u00ednh x\u00e1c.<\/p>\n

C\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p<\/h2>\n
\n

\u0110i\u1ec3m kh\u00e1c bi\u1ec7t gi\u1eefa r\u00e3nh ch\u1eef th\u1eadp ki\u1ec3u H v\u00e0 ki\u1ec3u Z l\u00e0 g\u00ec?<\/h3>\n

Lo\u1ea1i H l\u00e0 lo\u1ea1i \u0111\u1ea7u v\u00edt Phillips ti\u00eau chu\u1ea9n v\u1edbi c\u00e1c c\u00e1nh loe ra \u0111\u1ec3 s\u1eed d\u1ee5ng th\u00f4ng th\u01b0\u1eddng, trong khi lo\u1ea1i Z (Pozidriv) c\u00f3 th\u00eam c\u00e1c r\u00e3nh ph\u1ee5 \u0111\u1ec3 t\u0103ng \u0111\u1ed9 b\u00e1m v\u00e0 gi\u1ea3m hi\u1ec7n t\u01b0\u1ee3ng tr\u01b0\u1ee3t v\u00edt trong c\u00e1c \u1ee9ng d\u1ee5ng c\u1ea7n momen xo\u1eafn cao.<\/p>\n<\/div>\n

\n

L\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 ch\u1ecdn s\u1ed1 r\u00e3nh ph\u00f9 h\u1ee3p cho v\u00edt?<\/h3>\n

Ch\u1ecdn k\u00edch c\u1ee1 d\u1ef1a tr\u00ean \u0111\u01b0\u1eddng k\u00ednh v\u00edt: S\u1ed1 0 cho v\u00edt nh\u1ecf (v\u00ed d\u1ee5: M1.6), \u0111\u1ebfn s\u1ed1 4 cho v\u00edt l\u1edbn h\u01a1n (v\u00ed d\u1ee5: M10). Tham kh\u1ea3o c\u00e1c ti\u00eau chu\u1ea9n t\u01b0\u01a1ng th\u00edch nh\u01b0 GB\/T 845 \u0111\u1ec3 bi\u1ebft c\u00e1c c\u1eb7p k\u00edch c\u1ee1 c\u1ee5 th\u1ec3.<\/p>\n<\/div>\n

\n

C\u00e1c k\u00edch th\u01b0\u1edbc n\u00e0y c\u00f3 b\u1eaft bu\u1ed9c \u0111\u1ed1i v\u1edbi qu\u00e1 tr\u00ecnh s\u1ea3n xu\u1ea5t kh\u00f4ng?<\/h3>\n

Kh\u00f4ng, ch\u00fang ch\u1ec9 mang t\u00ednh l\u00fd thuy\u1ebft trong s\u1ea3n xu\u1ea5t khu\u00f4n m\u1eabu. S\u1ea3n ph\u1ea9m ho\u00e0n thi\u1ec7n \u0111\u01b0\u1ee3c ki\u1ec3m tra b\u1eb1ng th\u01b0\u1edbc \u0111o, ch\u1ee9 kh\u00f4ng ph\u1ea3i b\u1eb1ng c\u00e1ch so s\u00e1nh tr\u1ef1c ti\u1ebfp v\u1edbi c\u00e1c gi\u00e1 tr\u1ecb trong b\u1ea3ng.<\/p>\n<\/div>\n

\n

K\u00edch th\u01b0\u1edbc \u0111\u1ea7u \u0111o c\u00f3 m\u1ee5c \u0111\u00edch g\u00ec?<\/h3>\n

D\u1ee5ng c\u1ee5 \u0111o ki\u1ec3m tra \u0111\u1ed9 ph\u00f9 h\u1ee3p c\u1ee7a r\u00e3nh v\u00edt, \u0111\u1ea3m b\u1ea3o v\u00edt v\u1eeba kh\u00edt v\u1edbi tua v\u00edt v\u00e0 \u0111\u00e1p \u1ee9ng c\u00e1c y\u00eau c\u1ea7u v\u1ec1 hi\u1ec7u n\u0103ng trong qu\u00e1 tr\u00ecnh ki\u1ec3m \u0111\u1ecbnh ch\u1ea5t l\u01b0\u1ee3ng.<\/p>\n<\/div>\n

\n

Ti\u00eau chu\u1ea9n GB 944.1-1985 c\u00f3 li\u00ean quan nh\u01b0 th\u1ebf n\u00e0o \u0111\u1ebfn c\u00e1c ti\u00eau chu\u1ea9n qu\u1ed1c t\u1ebf?<\/h3>\n

Ti\u00eau chu\u1ea9n n\u00e0y t\u01b0\u01a1ng \u1ee9ng v\u1edbi ISO 4757:1983, t\u1ea1o \u0111i\u1ec1u ki\u1ec7n thu\u1eadn l\u1ee3i cho kh\u1ea3 n\u0103ng t\u01b0\u01a1ng th\u00edch qu\u1ed1c t\u1ebf trong thi\u1ebft k\u1ebf v\u00edt v\u00e0 d\u1ee5ng c\u1ee5.<\/p>\n<\/div>\n

\n

Nh\u1eefng lo\u1ea1i v\u1eadt li\u1ec7u n\u00e0o ph\u00f9 h\u1ee3p cho \u1ed1c v\u00edt c\u00f3 r\u00e3nh nh\u01b0 th\u1ebf n\u00e0y?<\/h3>\n

Th\u01b0\u1eddng \u0111\u01b0\u1ee3c l\u00e0m b\u1eb1ng th\u00e9p, th\u00e9p kh\u00f4ng g\u1ec9 ho\u1eb7c \u0111\u1ed3ng thau, \u0111\u1ea3m b\u1ea3o \u0111\u1ed9 c\u1ee9ng c\u1ee7a v\u1eadt li\u1ec7u cho ph\u00e9p t\u1ea1o h\u00ecnh r\u00e3nh ch\u00ednh x\u00e1c m\u00e0 kh\u00f4ng b\u1ecb bi\u1ebfn d\u1ea1ng.<\/p>\n<\/div>\n<\/div>","protected":false},"excerpt":{"rendered":"

Ti\u00eau chu\u1ea9n GB 944.1-1985: R\u00e3nh ch\u1eef th\u1eadp cho v\u00edt - Gi\u1edbi thi\u1ec7u Ti\u00eau chu\u1ea9n n\u00e0y, GB 944.1-1985, quy \u0111\u1ecbnh k\u00edch th\u01b0\u1edbc v\u00e0 y\u00eau c\u1ea7u \u0111\u1ed1i v\u1edbi c\u00e1c r\u00e3nh ch\u1eef th\u1eadp \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong v\u00edt, bao g\u1ed3m c\u1ea3 c\u00e1c thi\u1ebft k\u1ebf ki\u1ec3u Phillips. R\u00e3nh ch\u1eef th\u1eadp r\u1ea5t c\u1ea7n thi\u1ebft trong c\u00e1c \u1ee9ng d\u1ee5ng si\u1ebft ch\u1eb7t, gi\u00fap truy\u1ec1n m\u00f4-men xo\u1eafn t\u1ed1t h\u01a1n v\u00e0 gi\u1ea3m hi\u1ec7n t\u01b0\u1ee3ng tr\u01b0\u1ee3t v\u00edt so v\u1edbi c\u00e1c \u0111\u1ea7u v\u00edt c\u00f3 r\u00e3nh. Ch\u00fang \u0111\u01b0\u1ee3c \u1ee9ng d\u1ee5ng r\u1ed9ng r\u00e3i trong c\u00e1c ng\u00e0nh c\u00f4ng nghi\u1ec7p nh\u01b0 \u00f4 t\u00f4, \u0111i\u1ec7n t\u1eed v\u00e0 [\u2026]<\/p>","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":"","footnotes":""},"categories":[220],"tags":[],"class_list":["post-5598","post","type-post","status-publish","format-standard","hentry","category-technical-documentation-and-references"],"_links":{"self":[{"href":"https:\/\/korea-transmission.com\/vi\/wp-json\/wp\/v2\/posts\/5598","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/korea-transmission.com\/vi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/korea-transmission.com\/vi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/korea-transmission.com\/vi\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/korea-transmission.com\/vi\/wp-json\/wp\/v2\/comments?post=5598"}],"version-history":[{"count":2,"href":"https:\/\/korea-transmission.com\/vi\/wp-json\/wp\/v2\/posts\/5598\/revisions"}],"predecessor-version":[{"id":5600,"href":"https:\/\/korea-transmission.com\/vi\/wp-json\/wp\/v2\/posts\/5598\/revisions\/5600"}],"wp:attachment":[{"href":"https:\/\/korea-transmission.com\/vi\/wp-json\/wp\/v2\/media?parent=5598"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/korea-transmission.com\/vi\/wp-json\/wp\/v2\/categories?post=5598"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/korea-transmission.com\/vi\/wp-json\/wp\/v2\/tags?post=5598"}],"curies":[{"name":"trang web","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}