{"id":5625,"date":"2025-12-23T01:22:57","date_gmt":"2025-12-23T01:22:57","guid":{"rendered":"https:\/\/korea-transmission.com\/?p=5625"},"modified":"2025-12-23T01:23:53","modified_gmt":"2025-12-23T01:23:53","slug":"gb-t-5779-3-2000-fastener-defects-bolts-screws-studs","status":"publish","type":"post","link":"https:\/\/korea-transmission.com\/vi\/blog\/gb-t-5779-3-2000-fastener-defects-bolts-screws-studs\/","title":{"rendered":"Ti\u00eau chu\u1ea9n GB\/T 5779.3-2000 v\u1ec1 c\u00e1c khuy\u1ebft t\u1eadt c\u1ee7a chi ti\u1ebft l\u1eafp gh\u00e9p: Bu l\u00f4ng, \u1ed1c v\u00edt, \u0111inh t\u00e1n"},"content":{"rendered":"
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Gi\u1edbi thi\u1ec7u<\/h2>\n

Ti\u00eau chu\u1ea9n GB\/T 5779.3-2000 \u0111\u1ec1 c\u1eadp \u0111\u1ebfn c\u00e1c khuy\u1ebft t\u1eadt b\u1ec1 m\u1eb7t trong c\u00e1c chi ti\u1ebft l\u1eafp gh\u00e9p, c\u1ee5 th\u1ec3 l\u00e0 bu l\u00f4ng, \u1ed1c v\u00edt v\u00e0 \u0111inh t\u00e1n, v\u1edbi c\u00e1c y\u00eau c\u1ea7u \u0111\u1eb7c bi\u1ec7t. Ti\u00eau chu\u1ea9n n\u00e0y r\u1ea5t quan tr\u1ecdng trong ng\u00e0nh k\u1ef9 thu\u1eadt c\u01a1 kh\u00ed v\u00e0 s\u1ea3n xu\u1ea5t \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o \u0111\u1ed9 tin c\u1eady, an to\u00e0n v\u00e0 hi\u1ec7u su\u1ea5t c\u1ee7a c\u00e1c b\u1ed9 ph\u1eadn l\u1eafp gh\u00e9p. C\u00e1c khuy\u1ebft t\u1eadt b\u1ec1 m\u1eb7t c\u00f3 th\u1ec3 l\u00e0m suy y\u1ebfu t\u00ednh to\u00e0n v\u1eb9n c\u1ea5u tr\u00fac, d\u1eabn \u0111\u1ebfn h\u1ecfng h\u00f3c trong c\u00e1c \u1ee9ng d\u1ee5ng t\u1eeb \u00f4 t\u00f4 \u0111\u1ebfn h\u00e0ng kh\u00f4ng v\u0169 tr\u1ee5.<\/p>\n

\u0110\u01b0\u1ee3c gi\u1edbi thi\u1ec7u v\u00e0o n\u0103m 2000, ph\u1ea7n n\u00e0y c\u1ee7a b\u1ed9 ti\u00eau chu\u1ea9n GB\/T 5779 t\u1eadp trung v\u00e0o vi\u1ec7c x\u00e1c \u0111\u1ecbnh, ph\u00e2n lo\u1ea1i v\u00e0 h\u1ea1n ch\u1ebf c\u00e1c khuy\u1ebft t\u1eadt b\u1ec1 m\u1eb7t kh\u00e1c nhau c\u00f3 th\u1ec3 ph\u00e1t sinh trong qu\u00e1 tr\u00ecnh s\u1ea3n xu\u1ea5t nh\u01b0 r\u00e8n, x\u1eed l\u00fd nhi\u1ec7t v\u00e0 t\u1ea1o ren. B\u1eb1ng c\u00e1ch tu\u00e2n th\u1ee7 c\u00e1c h\u01b0\u1edbng d\u1eabn n\u00e0y, c\u00e1c nh\u00e0 s\u1ea3n xu\u1ea5t c\u00f3 th\u1ec3 duy tr\u00ec c\u00e1c ti\u00eau chu\u1ea9n ch\u1ea5t l\u01b0\u1ee3ng cao, gi\u1ea3m nguy c\u01a1 khuy\u1ebft t\u1eadt c\u00f3 th\u1ec3 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn kh\u1ea3 n\u0103ng ch\u1ecbu t\u1ea3i ho\u1eb7c kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n.<\/p>\n

Trong gia c\u00f4ng kim lo\u1ea1i, c\u00e1c khuy\u1ebft t\u1eadt b\u1ec1 m\u1eb7t nh\u01b0 n\u1ee9t, v\u1ee1 v\u00e0 l\u1ed7 r\u1ed7ng l\u00e0 nh\u1eefng v\u1ea5n \u0111\u1ec1 th\u01b0\u1eddng g\u1eb7p. Ti\u00eau chu\u1ea9n n\u00e0y cung c\u1ea5p c\u00e1c ti\u00eau ch\u00ed chi ti\u1ebft v\u1ec1 gi\u1edbi h\u1ea1n cho ph\u00e9p, \u0111\u1ea3m b\u1ea3o c\u00e1c chi ti\u1ebft l\u1eafp gh\u00e9p \u0111\u00e1p \u1ee9ng c\u00e1c ti\u00eau chu\u1ea9n ch\u1ea5t l\u01b0\u1ee3ng qu\u1ed1c t\u1ebf. Ti\u00eau chu\u1ea9n n\u00e0y \u00e1p d\u1ee5ng cho c\u00e1c chi ti\u1ebft l\u1eafp gh\u00e9p b\u1eb1ng th\u00e9p v\u00e0 kim lo\u1ea1i m\u00e0u \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong m\u00f4i tr\u01b0\u1eddng ch\u1ecbu t\u1ea3i cao, th\u00fac \u0111\u1ea9y t\u00ednh nh\u1ea5t qu\u00e1n trong ki\u1ec3m tra v\u00e0 ki\u1ec3m so\u00e1t ch\u1ea5t l\u01b0\u1ee3ng. Hi\u1ec3u r\u00f5 c\u00e1c khuy\u1ebft t\u1eadt n\u00e0y gi\u00fap c\u00e1c k\u1ef9 s\u01b0 l\u1ef1a ch\u1ecdn v\u1eadt li\u1ec7u v\u00e0 quy tr\u00ecnh ph\u00f9 h\u1ee3p, n\u00e2ng cao tu\u1ed5i th\u1ecd v\u00e0 \u0111\u1ed9 an to\u00e0n c\u1ee7a s\u1ea3n ph\u1ea9m.<\/p>\n

Ti\u00eau chu\u1ea9n n\u00e0y ph\u00e2n lo\u1ea1i c\u00e1c khuy\u1ebft t\u1eadt theo lo\u1ea1i, nguy\u00ean nh\u00e2n, h\u00ecnh d\u1ea1ng v\u00e0 gi\u1edbi h\u1ea1n, t\u1ea1o \u0111i\u1ec1u ki\u1ec7n thu\u1eadn l\u1ee3i cho vi\u1ec7c \u0111\u00e1nh gi\u00e1 ch\u00ednh x\u00e1c. V\u00ed d\u1ee5, n\u00f3 ph\u00e2n bi\u1ec7t gi\u1eefa c\u00e1c v\u1ebft n\u1ee9t do t\u00f4i luy\u1ec7n, v\u1ed1n b\u1ecb c\u1ea5m ho\u00e0n to\u00e0n, v\u00e0 c\u00e1c v\u1ebft n\u1ee9t do r\u00e8n, c\u00f3 dung sai k\u00edch th\u01b0\u1edbc c\u1ee5 th\u1ec3 d\u1ef1a tr\u00ean \u0111\u01b0\u1eddng k\u00ednh ren danh ngh\u0129a. C\u00e1ch ti\u1ebfp c\u1eadn c\u00f3 c\u1ea5u tr\u00fac n\u00e0y h\u1ed7 tr\u1ee3 ki\u1ec3m tra kh\u00f4ng ph\u00e1 h\u1ee7y v\u00e0 ph\u00e1 h\u1ee7y, \u0111\u1ea3m b\u1ea3o tu\u00e2n th\u1ee7 ti\u00eau chu\u1ea9n.<\/p>\n

Nh\u00ecn chung, ti\u00eau chu\u1ea9n GB\/T 5779.3-2000 \u0111\u00f3ng vai tr\u00f2 then ch\u1ed1t trong vi\u1ec7c chu\u1ea9n h\u00f3a s\u1ea3n xu\u1ea5t \u1ed1c v\u00edt, ph\u00f9 h\u1ee3p v\u1edbi c\u00e1c ti\u00eau chu\u1ea9n to\u00e0n c\u1ea7u nh\u01b0 ISO. Ti\u00eau chu\u1ea9n n\u00e0y h\u1ed7 tr\u1ee3 c\u00e1c ng\u00e0nh c\u00f4ng nghi\u1ec7p b\u1eb1ng c\u00e1ch cung c\u1ea5p c\u00e1c ti\u00eau ch\u00ed r\u00f5 r\u00e0ng, c\u00f3 th\u1ec3 \u0111o l\u01b0\u1eddng \u0111\u01b0\u1ee3c, g\u00f3p ph\u1ea7n t\u1ea1o ra c\u00e1c c\u1ee5m l\u1eafp r\u00e1p c\u01a1 kh\u00ed an to\u00e0n v\u00e0 hi\u1ec7u qu\u1ea3 h\u01a1n.<\/p>\n<\/div>\n

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T\u1ed5ng quan ti\u00eau chu\u1ea9n<\/h2>\n

Ti\u00eau chu\u1ea9n GB\/T 5779.3-2000 l\u00e0 m\u1ed9t ph\u1ea7n c\u1ee7a b\u1ed9 ti\u00eau chu\u1ea9n qu\u1ed1c gia Trung Qu\u1ed1c v\u1ec1 c\u00e1c khuy\u1ebft t\u1eadt b\u1ec1 m\u1eb7t c\u1ee7a v\u1eadt li\u1ec7u l\u1eafp gh\u00e9p. \u0110\u01b0\u1ee3c ban h\u00e0nh n\u0103m 2000, ti\u00eau chu\u1ea9n n\u00e0y d\u1ef1a tr\u00ean c\u00e1c ti\u00eau chu\u1ea9n tr\u01b0\u1edbc \u0111\u00f3 v\u00e0 ph\u00f9 h\u1ee3p v\u1edbi c\u00e1c th\u00f4ng l\u1ec7 qu\u1ed1c t\u1ebf v\u1ec1 \u0111\u1ea3m b\u1ea3o ch\u1ea5t l\u01b0\u1ee3ng trong l\u0129nh v\u1ef1c v\u1eadt li\u1ec7u l\u1eafp gh\u00e9p. Ti\u00eau chu\u1ea9n n\u00e0y \u0111\u1eb7c bi\u1ec7t n\u00eau r\u00f5 c\u00e1c y\u00eau c\u1ea7u \u0111\u1eb7c bi\u1ec7t \u0111\u1ed1i v\u1edbi bu l\u00f4ng, \u1ed1c v\u00edt v\u00e0 \u0111inh t\u00e1n, b\u1ed5 sung cho c\u00e1c y\u00eau c\u1ea7u chung trong c\u00e1c ph\u1ea7n kh\u00e1c c\u1ee7a b\u1ed9 ti\u00eau chu\u1ea9n n\u00e0y.<\/p>\n

Ph\u1ea1m vi \u00e1p d\u1ee5ng bao g\u1ed3m c\u00e1c khuy\u1ebft t\u1eadt b\u1ec1 m\u1eb7t nh\u01b0 v\u1ebft n\u1ee9t, \u0111\u01b0\u1eddng n\u1ed1i, l\u1ed7 r\u1ed7ng, n\u1ebfp g\u1ea5p, v\u1ebft d\u1ee5ng c\u1ee5, v\u1ebft ch\u1ed3ng ren v\u00e0 h\u01b0 h\u1ecfng. Ti\u00eau chu\u1ea9n n\u00e0y \u00e1p d\u1ee5ng cho c\u00e1c chi ti\u1ebft l\u1eafp gh\u00e9p l\u00e0m t\u1eeb nhi\u1ec1u kim lo\u1ea1i kh\u00e1c nhau, nh\u1ea5n m\u1ea1nh c\u00e1c khuy\u1ebft t\u1eadt c\u00f3 th\u1ec3 l\u00e0m suy gi\u1ea3m t\u00ednh ch\u1ea5t c\u01a1 h\u1ecdc. Ti\u00eau chu\u1ea9n n\u00e0y kh\u00f4ng bao g\u1ed3m c\u00e1c khuy\u1ebft t\u1eadt kh\u00f4ng \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn ch\u1ee9c n\u0103ng tr\u1eeb khi c\u00f3 quy \u0111\u1ecbnh kh\u00e1c.<\/p>\n

N\u1ed9i dung ch\u00ednh bao g\u1ed3m \u0111\u1ecbnh ngh\u0129a, nguy\u00ean nh\u00e2n, \u0111\u1eb7c \u0111i\u1ec3m h\u00ecnh \u1ea3nh v\u00e0 gi\u1edbi h\u1ea1n cho ph\u00e9p \u0111\u1ed1i v\u1edbi t\u1eebng lo\u1ea1i khuy\u1ebft t\u1eadt. T\u00e0i li\u1ec7u c\u0169ng n\u00eau chi ti\u1ebft c\u00e1c quy tr\u00ecnh ki\u1ec3m tra v\u00e0 \u0111\u00e1nh gi\u00e1, tham chi\u1ebfu ti\u00eau chu\u1ea9n GB\/T 90 v\u1ec1 l\u1ea5y m\u1eabu ch\u1ea5p nh\u1eadn. \u0110i\u1ec1u n\u00e0y \u0111\u1ea3m b\u1ea3o \u0111\u00e1nh gi\u00e1 kh\u00e1ch quan, v\u1edbi c\u00e1c quy \u0111\u1ecbnh v\u1ec1 ki\u1ec3m tra kh\u00f4ng ph\u00e1 h\u1ee7y v\u00e0 ph\u00e1 h\u1ee7y.<\/p>\n

C\u00e1c nh\u00e0 s\u1ea3n xu\u1ea5t ph\u1ea3i tu\u00e2n th\u1ee7 \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o t\u00ednh to\u00e0n v\u1eb9n c\u1ee7a s\u1ea3n ph\u1ea9m, trong khi ng\u01b0\u1eddi mua s\u1eed d\u1ee5ng n\u00f3 \u0111\u1ec3 x\u00e1c minh. C\u00e1c b\u1ea3n c\u1eadp nh\u1eadt c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n \u0111\u1ec3 t\u00edch h\u1ee3p nh\u1eefng ti\u1ebfn b\u1ed9 c\u00f4ng ngh\u1ec7, nh\u01b0ng phi\u00ean b\u1ea3n n\u00e0y v\u1eabn l\u00e0 n\u1ec1n t\u1ea3ng. \u0110\u1ecbnh d\u1ea1ng c\u00f3 c\u1ea5u tr\u00fac c\u1ee7a n\u00f3, v\u1edbi c\u00e1c b\u1ea3ng v\u00e0 h\u00ecnh minh h\u1ecda, n\u00e2ng cao kh\u1ea3 n\u0103ng s\u1eed d\u1ee5ng cho c\u00e1c k\u1ef9 s\u01b0 v\u00e0 thanh tra vi\u00ean.<\/p>\n

Tr\u00ean th\u1ef1c t\u1ebf, ti\u00eau chu\u1ea9n n\u00e0y th\u00fac \u0111\u1ea9y c\u00e1c bi\u1ec7n ph\u00e1p ph\u00f2ng ng\u1eeba trong s\u1ea3n xu\u1ea5t, ch\u1eb3ng h\u1ea1n nh\u01b0 t\u1ed1i \u01b0u h\u00f3a qu\u00e1 tr\u00ecnh r\u00e8n v\u00e0 x\u1eed l\u00fd nhi\u1ec7t, \u0111\u1ec3 gi\u1ea3m thi\u1ec3u khuy\u1ebft t\u1eadt. N\u00f3 t\u00e1c \u0111\u1ed9ng \u0111\u1ebfn chu\u1ed7i cung \u1ee9ng b\u1eb1ng c\u00e1ch thi\u1ebft l\u1eadp c\u00e1c ti\u00eau ch\u00ed ch\u1ea5p nh\u1eadn r\u00f5 r\u00e0ng, gi\u1ea3m thi\u1ec3u tranh ch\u1ea5p v\u00e0 t\u0103ng c\u01b0\u1eddng kh\u1ea3 n\u0103ng t\u01b0\u01a1ng th\u00edch th\u01b0\u01a1ng m\u1ea1i to\u00e0n c\u1ea7u.<\/p>\n<\/div>\n

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C\u00e1c lo\u1ea1i khuy\u1ebft t\u1eadt b\u1ec1 m\u1eb7t<\/h2>\n

C\u00e1c khuy\u1ebft t\u1eadt b\u1ec1 m\u1eb7t tr\u00ean c\u00e1c chi ti\u1ebft l\u1eafp gh\u00e9p \u0111\u01b0\u1ee3c ph\u00e2n lo\u1ea1i d\u1ef1a tr\u00ean ngu\u1ed3n g\u1ed1c v\u00e0 t\u00e1c \u0111\u1ed9ng c\u1ee7a ch\u00fang. Ph\u1ea7n n\u00e0y tr\u00ecnh b\u00e0y chi ti\u1ebft c\u00e1c lo\u1ea1i khuy\u1ebft t\u1eadt ch\u00ednh theo ti\u00eau chu\u1ea9n GB\/T 5779.3-2000, bao g\u1ed3m nguy\u00ean nh\u00e2n, h\u00ecnh th\u00e1i v\u00e0 gi\u1edbi h\u1ea1n.<\/p>\n

V\u1ebft n\u1ee9t<\/h3>\n

V\u1ebft n\u1ee9t l\u00e0 nh\u1eefng v\u1ebft g\u00e3y d\u1ecdc theo ranh gi\u1edbi gi\u1eefa c\u00e1c h\u1ea1t, th\u01b0\u1eddng do \u1ee9ng su\u1ea5t cao trong qu\u00e1 tr\u00ecnh r\u00e8n, t\u1ea1o h\u00ecnh ho\u1eb7c x\u1eed l\u00fd nhi\u1ec7t. Ch\u00fang c\u00f3 th\u1ec3 b\u1ecb \u0111\u1ed5i m\u00e0u do qu\u00e1 tr\u00ecnh oxy h\u00f3a.<\/p>\n

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  • C\u00e1c v\u1ebft n\u1ee9t do t\u00f4i luy\u1ec7n:<\/strong> G\u00e2y ra b\u1edfi \u1ee9ng su\u1ea5t nhi\u1ec7t trong qu\u00e1 tr\u00ecnh x\u1eed l\u00fd nhi\u1ec7t; h\u00ecnh d\u1ea1ng kh\u00f4ng \u0111\u1ec1u v\u00e0 giao nhau. Kh\u00f4ng \u0111\u01b0\u1ee3c ph\u00e9p c\u00f3 b\u1ea5t k\u1ef3 v\u1ebft n\u1ee9t n\u00e0o, d\u00f9 s\u00e2u hay d\u00e0i.<\/li>\n
  • R\u00e8n n\u1ee9t:<\/strong> X\u1ea3y ra trong qu\u00e1 tr\u00ecnh c\u1eaft ho\u1eb7c r\u00e8n tr\u00ean \u0111\u1ea7u v\u00edt. Chi\u1ec1u d\u00e0i \u2264 1d, \u0111\u1ed9 s\u00e2u\/chi\u1ec1u r\u1ed9ng \u2264 0,04d (d = \u0111\u01b0\u1eddng k\u00ednh danh ngh\u0129a). Kh\u00f4ng \u00e1p d\u1ee5ng cho v\u00edt \u0111\u1ea7u l\u1ee5c gi\u00e1c.<\/li>\n
  • R\u00e8n luy\u1ec7n b\u00f9ng n\u1ed5:<\/strong> Xu\u1ea5t hi\u1ec7n tr\u00ean \u0111\u1ea7u l\u1ee5c gi\u00e1c, m\u1eb7t b\u00edch ho\u1eb7c \u0111\u1ea7u tr\u00f2n. Gi\u1edbi h\u1ea1n thay \u0111\u1ed5i: chi\u1ec1u r\u1ed9ng \u2264 0,08dc ho\u1eb7c dk \u0111\u1ed1i v\u1edbi c\u00e1c v\u1ebft n\u1ee9t \u0111\u01a1n l\u1ebb, \u0111\u1ed9 s\u00e2u \u2264 0,04dc (dc\/\u0111\u01b0\u1eddng k\u00ednh m\u1eb7t b\u00edch, dk\/\u0111\u01b0\u1eddng k\u00ednh \u0111\u1ea7u).<\/li>\n
  • S\u1ef1 n\u1ed5 do l\u1ef1c c\u1eaft:<\/strong> \u1ede g\u00f3c 45\u00b0 so v\u1edbi tr\u1ee5c tr\u00ean c\u00e1c \u0111\u1ea7u tr\u00f2n\/m\u1eb7t b\u00edch ho\u1eb7c c\u00e1c m\u1eb7t ph\u1eb3ng l\u1ee5c gi\u00e1c. Chi\u1ec1u r\u1ed9ng \u2264 0,25mm + 0,02s, chi\u1ec1u s\u00e2u \u2264 0,04d (s = chi\u1ec1u r\u1ed9ng gi\u1eefa c\u00e1c m\u1eb7t ph\u1eb3ng).<\/li>\n
  • C\u00e1c v\u1ebft n\u1ee9t do r\u00e8n tr\u00ean \u1ed1c v\u00edt \u0111\u1ea7u l\u1ee5c gi\u00e1c:<\/strong> Do \u1ee9ng su\u1ea5t trong qu\u00e1 tr\u00ecnh r\u00e8n\/gia c\u00f4ng. Kh\u00f4ng c\u00f3 v\u1ebft n\u1ee9t n\u00e0o lan t\u1eeb r\u00e3nh \u0111\u1ebfn b\u1ec1 m\u1eb7t; gi\u1edbi h\u1ea1n \u0111\u1ed9 s\u00e2u c\u1ee5 th\u1ec3 nh\u01b0 h1 \u2264 0,03dk (t\u1ed1i \u0111a 0,13mm).<\/li>\n<\/ul>\n

    C\u00e1c gi\u1edbi h\u1ea1n n\u00e0y \u0111\u1ea3m b\u1ea3o t\u00ednh to\u00e0n v\u1eb9n c\u1ea5u tr\u00fac, ng\u0103n ng\u1eeba s\u1ef1 lan truy\u1ec1n d\u01b0\u1edbi t\u1ea3i tr\u1ecdng.<\/p>\n

    \u0110\u01b0\u1eddng n\u1ed1i v\u00e0 m\u1ed1i gh\u00e9p nguy\u00ean li\u1ec7u th\u00f4<\/h3>\n

    \u0110\u00e2y l\u00e0 nh\u1eefng \u0111\u01b0\u1eddng m\u1ea3nh d\u1ecdc theo chi\u1ec1u d\u00e0i do c\u00e1c khuy\u1ebft t\u1eadt v\u1eadt li\u1ec7u v\u1ed1n c\u00f3. \u0110\u1ed9 s\u00e2u \u2264 0,015d + 0,1mm (t\u1ed1i \u0111a 0,4mm). N\u1ebfu k\u00e9o d\u00e0i \u0111\u1ebfn \u0111\u1ea7u, ph\u1ea3i tu\u00e2n th\u1ee7 gi\u1edbi h\u1ea1n n\u1ed5.<\/p>\n

    Kho\u1ea3ng tr\u1ed1ng<\/h3>\n

    C\u00e1c v\u1ebft r\u1ed7 n\u00f4ng do kim lo\u1ea1i ch\u01b0a \u0111\u01b0\u1ee3c l\u1ea5p \u0111\u1ea7y trong qu\u00e1 tr\u00ecnh r\u00e8n. \u0110\u1ed9 s\u00e2u \u2264 0,02d (t\u1ed1i \u0111a 0,25mm); t\u1ed5ng di\u1ec7n t\u00edch tr\u00ean b\u1ec1 m\u1eb7t ch\u1ecbu l\u1ef1c \u2264 5%.<\/p>\n

    G\u1ea5p<\/h3>\n

    C\u00e1c ph\u1ea7n kim lo\u1ea1i ch\u1ed3ng l\u00ean nhau do s\u1ef1 bi\u1ebfn d\u1ea1ng trong qu\u00e1 tr\u00ecnh r\u00e8n. C\u1ea5m \u1edf c\u00e1c g\u00f3c trong b\u00ean d\u01b0\u1edbi b\u1ec1 m\u1eb7t ch\u1ecbu l\u1ef1c; \u0111\u01b0\u1ee3c ph\u00e9p \u1edf c\u00e1c g\u00f3c ngo\u00e0i tr\u1eeb khi c\u00f3 quy \u0111\u1ecbnh kh\u00e1c.<\/p>\n

    D\u1ea5u v\u1ebft d\u1ee5ng c\u1ee5<\/h3>\n

    C\u00e1c r\u00e3nh do chuy\u1ec3n \u0111\u1ed9ng c\u1ee7a d\u1ee5ng c\u1ee5. \u0110\u1ed9 nh\u00e1m b\u1ec1 m\u1eb7t \u2264 Ra 3,2\u03bcm tr\u00ean th\u00e2n, g\u00f3c l\u01b0\u1ee3n ho\u1eb7c m\u1eb7t ti\u1ebfp x\u00fac.<\/p>\n

    V\u00f2ng tr\u00ean s\u1ee3i ch\u1ec9<\/h3>\n

    N\u1ebfp nh\u0103n do c\u00e1n ren. C\u1ea5m t\u1ea1o n\u1ebfp nh\u0103n \u1edf ch\u00e2n ren ho\u1eb7c s\u01b0\u1eddn ch\u1ecbu t\u1ea3i b\u00ean d\u01b0\u1edbi \u0111\u01b0\u1eddng k\u00ednh b\u01b0\u1edbc ren; gi\u1edbi h\u1ea1n \u1edf \u0111\u1ed9 s\u00e2u\/chi\u1ec1u d\u00e0i 0,25H1 tr\u00ean m\u1ed7i v\u00f2ng ren (H1 = chi\u1ec1u cao ren).<\/p>\n

    Thi\u1ec7t h\u1ea1i<\/h3>\n

    V\u1ebft x\u01b0\u1edbc do thao t\u00e1c. Ch\u1ea5p nh\u1eadn \u0111\u01b0\u1ee3c tr\u1eeb khi l\u00e0m \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn ch\u1ee9c n\u0103ng; m\u00f4-men xo\u1eafn cho ba ren \u0111\u1ea7u ti\u00ean \u2264 0,001d\u00b3 N\u00b7m.<\/p>\n<\/div>\n

    \n

    B\u1ea3ng c\u00e1c khuy\u1ebft t\u1eadt b\u1ec1 m\u1eb7t cho ph\u00e9p<\/h2>\n\n\n\n\n\n\n
    \u0110\u01b0\u1eddng k\u00ednh danh ngh\u0129a d (mm)<\/th>\nChi\u1ec1u d\u00e0i t\u1ed1i \u0111a c\u1ee7a c\u00e1c v\u1ebft n\u1ee9t r\u00e8n<\/th>\n\u0110\u1ed9 r\u1ed9ng\/\u0111\u1ed9 s\u00e2u t\u1ed1i \u0111a c\u1ee7a v\u1ebft n\u1ee9t r\u00e8n<\/th>\nChi\u1ec1u r\u1ed9ng t\u1ed1i \u0111a c\u1ee7a v\u1ebft n\u1ee9t do r\u00e8n (h\u00ecnh tr\u00f2n\/m\u1eb7t b\u00edch)<\/th>\n\u0110\u1ed9 s\u00e2u t\u1ed1i \u0111a c\u1ee7a c\u00e1c v\u1ee5 n\u1ed5 r\u00e8n<\/th>\n\u0110\u1ed9 r\u1ed9ng t\u1ed1i \u0111a c\u1ee7a v\u1ebft n\u1ee9t do l\u1ef1c c\u1eaft<\/th>\n\u0110\u1ed9 s\u00e2u t\u1ed1i \u0111a c\u1ee7a v\u1ebft n\u1ee9t do l\u1ef1c c\u1eaft<\/th>\nChi\u1ec1u d\u00e0i r\u00e3nh t\u1ed1i \u0111a c\u1ee7a \u1ed5 c\u1eafm b\u1ecb n\u1ee9t<\/th>\n\u0110\u1ed9 s\u00e2u b\u1ec1 m\u1eb7t t\u1ed1i \u0111a c\u1ee7a c\u00e1c v\u1ebft n\u1ee9t \u1ed5 c\u1eafm<\/th>\n\u0110\u1ed9 s\u00e2u t\u1ed1i \u0111a c\u1ee7a c\u00e1c v\u1ebft n\u1ee9t tr\u00ean b\u1ec1 m\u1eb7t \u1ed5 c\u1eafm<\/th>\n\u0110\u1ed9 s\u00e2u \u0111\u01b0\u1eddng may t\u1ed1i \u0111a<\/th>\n\u0110\u1ed9 s\u00e2u t\u1ed1i \u0111a c\u1ee7a c\u00e1c kho\u1ea3ng tr\u1ed1ng<\/th>\n\u0110\u1ed9 s\u00e2u ren t\u1ed1i \u0111a<\/th>\nM\u00f4-men xo\u1eafn c\u1ef1c \u0111\u1ea1i (N\u00b7m)<\/th>\n<\/tr>\n<\/thead>\n
    5<\/td>\n5<\/td>\n0.2<\/td>\n0,08\u00d7dc ho\u1eb7c dk<\/td>\n0.2<\/td>\n0,25 + 0,02 gi\u00e2y ho\u1eb7c 0,08 \u00d7 dc<\/td>\n0.2<\/td>\n0,25\u00d7t<\/td>\n0.13<\/td>\n0,03\u00d7dk t\u1ed1i \u0111a 0,13mm<\/td>\n0,06\u00d7dk t\u1ed1i \u0111a 1,6mm<\/td>\n0.17<\/td>\n0.1<\/td>\n0,25 gi\u1edd1<\/sub><\/td>\n0.125<\/td>\n<\/tr>\n

    <\/p>\n

    39<\/td>\n39<\/td>\n1.6<\/td>\n0,08\u00d7dc ho\u1eb7c dk<\/td>\n1.6<\/td>\n0,25 + 0,02 gi\u00e2y ho\u1eb7c 0,08 \u00d7 dc<\/td>\n1.6<\/td>\n0,25\u00d7t<\/td>\n0.13<\/td>\n0,03\u00d7dk t\u1ed1i \u0111a 0,13mm<\/td>\n0,06\u00d7dk t\u1ed1i \u0111a 1,6mm<\/td>\n0.4<\/td>\n0.25<\/td>\n0,25 gi\u1edd1<\/sub><\/td>\n59.3<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

    L\u01b0u \u00fd: C\u00e1c gi\u00e1 tr\u1ecb l\u00e0 gi\u00e1 tr\u1ecb t\u1ed1i \u0111a; vui l\u00f2ng tham kh\u1ea3o ti\u00eau chu\u1ea9n \u0111\u1ec3 bi\u1ebft th\u00f4ng tin chi ti\u1ebft \u0111\u1ea7y \u0111\u1ee7.<\/p>\n<\/div>\n

    \n

    Quy tr\u00ecnh ki\u1ec3m tra v\u00e0 \u0111\u00e1nh gi\u00e1<\/h2>\n

    Vi\u1ec7c ki\u1ec3m tra tu\u00e2n theo ti\u00eau chu\u1ea9n GB\/T 90 \u0111\u1ec3 nghi\u1ec7m thu. L\u1edbp ph\u1ee7 c\u00f3 th\u1ec3 b\u1ecb lo\u1ea1i b\u1ecf n\u1ebfu ch\u00fang che khu\u1ea5t c\u00e1c khuy\u1ebft t\u1eadt.<\/p>\n

      \n
    • Quy t\u1eafc:<\/strong> C\u00e1c nh\u00e0 s\u1ea3n xu\u1ea5t s\u1eed d\u1ee5ng b\u1ea5t k\u1ef3 ph\u01b0\u01a1ng ph\u00e1p n\u00e0o \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o tu\u00e2n th\u1ee7; ng\u01b0\u1eddi mua \u00e1p d\u1ee5ng c\u00e1c quy tr\u00ecnh c\u1ee5 th\u1ec3 \u0111\u1ec3 ch\u1ea5p nh\u1eadn\/t\u1eeb ch\u1ed1i.<\/li>\n
    • Ki\u1ec3m tra kh\u00f4ng ph\u00e1 h\u1ee7y:<\/strong> L\u1ea5y m\u1eabu ng\u1eabu nhi\u00ean theo Ph\u1ee5 l\u1ee5c A B\u1ea3ng A1; ph\u01b0\u01a1ng ph\u00e1p tr\u1ef1c quan ho\u1eb7c t\u1eeb t\u00ednh\/d\u00f2ng \u0111i\u1ec7n xo\u00e1y. Ch\u1ea5p nh\u1eadn n\u1ebfu n\u1eb1m trong gi\u1edbi h\u1ea1n cho ph\u00e9p; ti\u1ebfn h\u00e0nh ph\u00e1 h\u1ee7y n\u1ebfu v\u01b0\u1ee3t qu\u00e1 gi\u1edbi h\u1ea1n.<\/li>\n
    • Ki\u1ec3m tra ph\u00e1 h\u1ee7y:<\/strong> Ph\u1ea7n c\u1eaft t\u1ea1i v\u1ecb tr\u00ed khuy\u1ebft t\u1eadt s\u00e2u nh\u1ea5t theo Ph\u1ee5 l\u1ee5c A B\u1ea3ng A2; \u0111o so v\u1edbi gi\u1edbi h\u1ea1n cho ph\u00e9p.<\/li>\n
    • Ph\u00e1n quy\u1ebft:<\/strong> Lo\u1ea1i b\u1ecf n\u1ebfu c\u00f3 v\u1ebft n\u1ee9t do t\u00f4i luy\u1ec7n, n\u1ebfp g\u1ea5p \u1edf g\u00f3c trong ho\u1eb7c qu\u00e1 nhi\u1ec1u khuy\u1ebft t\u1eadt khi ki\u1ec3m tra b\u1eb1ng ph\u01b0\u01a1ng ph\u00e1p ph\u00e1 h\u1ee7y.<\/li>\n<\/ul>\n

      C\u00e1c quy tr\u00ecnh n\u00e0y \u0111\u1ea3m b\u1ea3o ki\u1ec3m so\u00e1t ch\u1ea5t l\u01b0\u1ee3ng nghi\u00eam ng\u1eb7t, gi\u1ea3m thi\u1ec3u r\u1ee7i ro trong qu\u00e1 tr\u00ecnh \u1ee9ng d\u1ee5ng.<\/p>\n<\/div>\n

      \n

      T\u00e1c \u0111\u1ed9ng \u0111\u1ebfn ng\u00e0nh c\u00f4ng nghi\u1ec7p<\/h2>\n

      Ti\u00eau chu\u1ea9n n\u00e0y t\u00e1c \u0111\u1ed9ng \u0111\u1ebfn ng\u00e0nh s\u1ea3n xu\u1ea5t \u1ed1c v\u00edt b\u1eb1ng c\u00e1ch chu\u1ea9n h\u00f3a gi\u1edbi h\u1ea1n l\u1ed7i, n\u00e2ng cao \u0111\u1ed9 tin c\u1eady c\u1ee7a s\u1ea3n ph\u1ea9m trong c\u00e1c l\u0129nh v\u1ef1c nh\u01b0 x\u00e2y d\u1ef1ng v\u00e0 m\u00e1y m\u00f3c. N\u00f3 h\u1ed7 tr\u1ee3 ki\u1ec3m so\u00e1t ch\u1ea5t l\u01b0\u1ee3ng, gi\u1ea3m thi\u1ec3u l\u1ed7i v\u00e0 chi ph\u00ed. C\u00e1c nghi\u00ean c\u1ee9u \u0111i\u1ec3n h\u00ecnh cho th\u1ea5y hi\u1ec7u su\u1ea5t \u0111\u01b0\u1ee3c c\u1ea3i thi\u1ec7n trong m\u00f4i tr\u01b0\u1eddng rung \u0111\u1ed9ng cao th\u00f4ng qua vi\u1ec7c gi\u1ea3m thi\u1ec3u l\u1ed7i.<\/p>\n<\/div>\n

      \n

      C\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p<\/h2>\n
      \n
      S\u1ef1 kh\u00e1c bi\u1ec7t ch\u00ednh gi\u1eefa v\u1ebft n\u1ee9t do t\u00f4i luy\u1ec7n v\u00e0 v\u1ebft n\u1ee9t do r\u00e8n l\u00e0 g\u00ec?<\/dt>\n
      C\u00e1c v\u1ebft n\u1ee9t do t\u00f4i luy\u1ec7n l\u00e0 k\u1ebft qu\u1ea3 c\u1ee7a \u1ee9ng su\u1ea5t trong qu\u00e1 tr\u00ecnh x\u1eed l\u00fd nhi\u1ec7t v\u00e0 ho\u00e0n to\u00e0n b\u1ecb c\u1ea5m, trong khi c\u00e1c v\u1ebft n\u1ee9t do r\u00e8n c\u00f3 gi\u1edbi h\u1ea1n cho ph\u00e9p d\u1ef1a tr\u00ean \u0111\u01b0\u1eddng k\u00ednh.<\/dd>\n
      <\/dd>\n
      T\u00f4i c\u00f3 th\u1ec3 ki\u1ec3m tra c\u00e1c khuy\u1ebft t\u1eadt b\u1ec1 m\u1eb7t tr\u00ean \u1ed1c v\u00edt nh\u01b0 th\u1ebf n\u00e0o?<\/dt>\n
      H\u00e3y s\u1eed d\u1ee5ng c\u00e1c ph\u01b0\u01a1ng ph\u00e1p kh\u00f4ng ph\u00e1 h\u1ee7y nh\u01b0 ki\u1ec3m tra b\u1eb1ng m\u1eaft th\u01b0\u1eddng ho\u1eb7c ki\u1ec3m tra b\u1eb1ng h\u1ea1t t\u1eeb t\u00ednh, sau \u0111\u00f3 ti\u1ebfn h\u00e0nh c\u1eaft l\u00e1t ph\u00e1 h\u1ee7y n\u1ebfu c\u1ea7n thi\u1ebft, theo quy tr\u00ecnh c\u1ee7a ti\u00eau chu\u1ea9n.<\/dd>\n
      <\/dd>\n
      C\u00f3 gi\u1edbi h\u1ea1n n\u00e0o \u0111\u1ed1i v\u1edbi c\u00e1c khuy\u1ebft t\u1eadt tr\u00ean \u1ed1c v\u00edt \u0111\u1ea7u l\u1ee5c gi\u00e1c kh\u00f4ng?<\/dt>\n
      \u0110\u00fang v\u1eady, c\u00f3 nh\u1eefng gi\u1edbi h\u1ea1n c\u1ee5 th\u1ec3, ch\u1eb3ng h\u1ea1n nh\u01b0 kh\u00f4ng \u0111\u01b0\u1ee3c c\u00f3 v\u1ebft n\u1ee9t lan ra t\u1eeb ch\u1ed7 l\u00f5m v\u00e0 \u0111\u1ed9 s\u00e2u t\u1ed1i \u0111a l\u00e0 0,03dk.<\/dd>\n
      <\/dd>\n
      \u0110i\u1ec1u g\u00ec s\u1ebd x\u1ea3y ra n\u1ebfu h\u00e0ng h\u00f3a b\u1ecb h\u01b0 h\u1ecfng trong qu\u00e1 tr\u00ecnh v\u1eadn chuy\u1ec3n?<\/dt>\n
      Thi\u1ec7t h\u1ea1i \u0111\u01b0\u1ee3c ch\u1ea5p nh\u1eadn n\u1ebfu ch\u00fang kh\u00f4ng \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn ch\u1ee9c n\u0103ng; c\u00e1c th\u1ecfa thu\u1eadn \u0111\u00f3ng g\u00f3i \u0111\u1eb7c bi\u1ec7t c\u00f3 th\u1ec3 ng\u0103n ng\u1eeba \u0111i\u1ec1u n\u00e0y.<\/dd>\n
      <\/dd>\n
      Ti\u00eau chu\u1ea9n n\u00e0y so s\u00e1nh nh\u01b0 th\u1ebf n\u00e0o v\u1edbi c\u00e1c ti\u00eau chu\u1ea9n ISO t\u01b0\u01a1ng \u0111\u01b0\u01a1ng?<\/dt>\n
      Ti\u00eau chu\u1ea9n n\u00e0y t\u01b0\u01a1ng \u0111\u1ed3ng ch\u1eb7t ch\u1ebd v\u1edbi ISO 6157-3, cung c\u1ea5p c\u00e1c ph\u00e2n lo\u1ea1i v\u00e0 gi\u1edbi h\u1ea1n khuy\u1ebft t\u1eadt t\u01b0\u01a1ng t\u1ef1 \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o t\u00ednh t\u01b0\u01a1ng th\u00edch qu\u1ed1c t\u1ebf.<\/dd>\n
      <\/dd>\n
      L\u1edbp ph\u1ee7 c\u00f3 th\u1ec3 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn vi\u1ec7c ki\u1ec3m tra khuy\u1ebft t\u1eadt kh\u00f4ng?<\/dt>\n
      \u0110\u00fang v\u1eady, c\u00e1c l\u1edbp ph\u1ee7 n\u00ean \u0111\u01b0\u1ee3c lo\u1ea1i b\u1ecf n\u1ebfu ch\u00fang c\u1ea3n tr\u1edf vi\u1ec7c nh\u1eadn di\u1ec7n c\u00e1c khuy\u1ebft t\u1eadt tr\u00ean b\u1ec1 m\u1eb7t.<\/dd>\n<\/dl>\n<\/div>\n<\/article>","protected":false},"excerpt":{"rendered":"

      Introduction The GB\/T 5779.3-2000 standard addresses surface defects in fasteners, specifically bolts, screws, and studs, with special requirements. This standard is crucial in mechanical engineering and manufacturing industries to ensure the reliability, safety, and performance of fastening components. Surface defects can compromise structural integrity, leading to failures in applications ranging from automotive to aerospace engineering. […]<\/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-5625","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\/5625","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=5625"}],"version-history":[{"count":2,"href":"https:\/\/korea-transmission.com\/vi\/wp-json\/wp\/v2\/posts\/5625\/revisions"}],"predecessor-version":[{"id":5627,"href":"https:\/\/korea-transmission.com\/vi\/wp-json\/wp\/v2\/posts\/5625\/revisions\/5627"}],"wp:attachment":[{"href":"https:\/\/korea-transmission.com\/vi\/wp-json\/wp\/v2\/media?parent=5625"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/korea-transmission.com\/vi\/wp-json\/wp\/v2\/categories?post=5625"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/korea-transmission.com\/vi\/wp-json\/wp\/v2\/tags?post=5625"}],"curies":[{"name":"trang web","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}