{"id":4235,"date":"2014-05-16T15:12:04","date_gmt":"2014-05-16T07:12:04","guid":{"rendered":"https:\/\/www.sungda.com\/vi\/post\/what-is-piw-standard-from-us-and-how-to-convert-vi"},"modified":"2026-04-08T17:24:23","modified_gmt":"2026-04-08T17:24:23","slug":"what-is-piw-standard-from-us-and-how-to-convert-vi","status":"publish","type":"post","link":"https:\/\/www.sungda.com\/vi\/index.php\/what-is-piw-standard-from-us-and-how-to-convert-vi\/","title":{"rendered":"PIW c\u1ee7a \u0111ai l\u00e0 g\u00ec v\u00e0 L\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 Chuy\u1ec3n \u0111\u1ed5i th\u00e0nh \u0110ai EP?"},"content":{"rendered":"\n
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“PIW” l\u00e0 m\u1ed9t ti\u00eau chu\u1ea9n v\u1ec1 \u0111\u1ed9 b\u1ec1n trong quy c\u00e1ch b\u0103ng t\u1ea3i cao su<\/figcaption><\/figure><\/div>\n<\/div>\n<\/div>\n<\/div><\/div>\n\n\n\n

Gi\u1edbi thi\u1ec7u chung:<\/span><\/span><\/h2>\n\n\n\n

Ch\u00fang ta th\u01b0\u1eddng th\u1ea5y 220PIW\/2<\/span>, 330PIW\/3 ho\u1eb7c 440PIW\/4 trong quy c\u00e1ch b\u0103ng t\u1ea3i, v\u1eady “PIW” c\u00f3 ngh\u0129a l\u00e0 g\u00ec v\u00e0 n\u00f3 \u0111\u01b0\u1ee3c chuy\u1ec3n \u0111\u1ed5i sang c\u1ea5p EP trong b\u0103ng t\u1ea3i nh\u01b0 th\u1ebf n\u00e0o? “PIW” l\u00e0 m\u1ed9t \u0111\u01a1n v\u1ecb \u0111o l\u01b0\u1eddng theo h\u1ec7 inch<\/span> ,<\/span> c\u00f3 ngh\u0129a l\u00e0 “Pounds Per Inch of Belt Width” theo ti\u00eau chu\u1ea9n M\u1ef9 (RMA), \u0111\u01b0\u1ee3c m\u00f4 t\u1ea3 l\u00e0 “Max.Oper.Working Strength” c\u1ee7a b\u0103ng t\u1ea3i EP, v\u00e0 ti\u00eau chu\u1ea9n PIW \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i \u1edf c\u00e1c qu\u1ed1c gia B\u1eafc v\u00e0 Nam M\u1ef9 bao g\u1ed3m Hoa K\u1ef3.<\/span><\/p>\n\n\n

B\u00ean ngo\u00e0i n\u01b0\u1edbc M\u1ef9, “Breaking Strength” c\u1ee7a b\u0103ng t\u1ea3i EP<\/span><\/a> \u0111\u01b0\u1ee3c \u0111\u00e1nh gi\u00e1 b\u1eb1ng N\/mm, t\u1ee9c l\u00e0 Newton tr\u00ean milim\u00e9t chi\u1ec1u r\u1ed9ng b\u0103ng t\u1ea3i cao su EP. \u0110\u1ed9 b\u1ec1n \u0111\u1ee9t c\u1ee7a b\u0103ng t\u1ea3i \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh ch\u00ednh x\u00e1c, t\u00f9y thu\u1ed9c v\u00e0o \u0111i\u1ec1u ki\u1ec7n v\u1eadn h\u00e0nh, lo\u1ea1i m\u1ed1i n\u1ed1i, v.v. H\u1ec7 s\u1ed1 an to\u00e0n li\u00ean quan \u0111\u1ebfn \u0111i\u1ec3m y\u1ebfu nh\u1ea5t c\u1ee7a b\u0103ng t\u1ea3i EP, \u0111\u00f3 l\u00e0 ph\u1ea7n m\u1ed1i n\u1ed1i c\u1ee7a b\u0103ng t\u1ea3i. S\u1ef1 kh\u00e1c bi\u1ec7t l\u1edbn nh\u1ea5t gi\u1eefa PIW v\u00e0 N\/mm l\u00e0 PIW m\u00f4 t\u1ea3 “L\u1ef1c c\u0103ng v\u1eadn h\u00e0nh<\/strong>“, trong khi N\/mm m\u00f4 t\u1ea3 “\u0110\u1ed9 b\u1ec1n khi \u0111\u1ee9t<\/strong>“.<\/span><\/p>\n\n\n

H\u00e3y c\u00f9ng xem s\u1ef1 kh\u00e1c bi\u1ec7t v\u1ec1 s\u1ee3i gi\u1eefa h\u1ec7 M\u1ef9 v\u00e0 h\u1ec7 M\u00e9t.<\/span><\/p>\n\n\n

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V\u1eady t\u1ea1i sao ch\u00fang ta c\u1ea7n t\u00ednh to\u00e1n PIW? <\/strong><\/p>\n\n\n

\u0110i\u1ec1u n\u00e0y l\u00e0 do \u0111\u1ed9 b\u1ec1n c\u1ee7a m\u1ed9t b\u0103ng t\u1ea3i, cho d\u00f9 l\u00e0 \u0111\u1ecbnh m\u1ee9c l\u1ef1c c\u0103ng c\u1ee7a l\u1edbp l\u00f5i hay \u0111\u1ed9 b\u1ec1n \u0111\u1ee9t t\u1ed1i \u0111a, \u0111\u1ea1i di\u1ec7n cho l\u01b0\u1ee3ng l\u1ef1c c\u00f3 th\u1ec3 t\u00e1c d\u1ee5ng l\u00ean b\u0103ng t\u1ea3i. V\u00ed d\u1ee5, m\u1ed9t b\u0103ng t\u1ea3i 3 l\u1edbp \u0111\u01b0\u1ee3c \u0111\u00e1nh gi\u00e1 110 PIW m\u1ed7i l\u1edbp, t\u01b0\u01a1ng \u0111\u01b0\u01a1ng v\u1edbi b\u0103ng t\u1ea3i 330 PIW. \u0110\u00e2y l\u00e0 l\u1ef1c c\u0103ng \u0111\u1ecbnh m\u1ee9c t\u1ed1i \u0111a m\u00e0 b\u0103ng t\u1ea3i c\u00f3 th\u1ec3 v\u1eadn h\u00e0nh m\u00e0 kh\u00f4ng b\u1ecb h\u01b0 h\u1ecfng, v\u01b0\u1ee3t qu\u00e1 l\u1ef1c c\u0103ng \u0111\u1ecbnh m\u1ee9c c\u1ee7a b\u0103ng t\u1ea3i c\u00f3 th\u1ec3 g\u00e2y \u0111\u1ee9t, gi\u00e3n qu\u00e1 m\u1ee9c, h\u1ecfng m\u1ed1i n\u1ed1i, v.v., v\u00ec v\u1eady vi\u1ec7c t\u00ednh to\u00e1n tr\u01b0\u1edbc gi\u00e1 tr\u1ecb PIW l\u00e0 r\u1ea5t quan tr\u1ecdng.<\/span><\/p>\n\n\n

PIW v\u00e0 N\/mm chuy\u1ec3n \u0111\u1ed5i cho nhau nh\u01b0 th\u1ebf n\u00e0o?<\/span><\/span><\/span><\/h2>\n\n\n\n

N\u1ebfu kh\u00f4ng x\u00e9t \u0111\u1ebfn h\u1ec7 s\u1ed1 an to\u00e0n, PIW \u0111\u01b0\u1ee3c chuy\u1ec3n \u0111\u1ed5i th\u00e0nh N\/mm(EP) b\u1eb1ng c\u00e1ch nh\u00e2n v\u1edbi 0.175.<\/span><\/p>\n\n\n

V\u00ed d\u1ee5: 2284 PIW x 0.175 = 400 N\/mm(400kN\/m)<\/span><\/span><\/strong><\/span>
<\/span>N\/mm chuy\u1ec3n \u0111\u1ed5i th\u00e0nh PIW b\u1eb1ng c\u00e1ch nh\u00e2n v\u1edbi 5.71. V\u00ed d\u1ee5: 400 N\/mm x 5.71 = 2284 PIW<\/span><\/span><\/strong><\/span><\/p>\n\n\n

C\u00e1ch chuy\u1ec3n \u0111\u1ed5i b\u0103ng t\u1ea3i PIW sang b\u0103ng t\u1ea3i EP<\/strong><\/span><\/p>\n\n\n

H\u00e3y l\u1ea5y b\u0103ng t\u1ea3i PIW330\/3 ph\u1ed5 bi\u1ebfn nh\u1ea5t l\u00e0m v\u00ed d\u1ee5: 330PIW x 0.175 = 57.75. N\u1ebfu h\u1ec7 s\u1ed1 an to\u00e0n l\u00e0 10, th\u00ec t\u1ed5ng \u0111\u1ed9 b\u1ec1n k\u00e9o c\u1ee7a b\u0103ng t\u1ea3i s\u1ebd l\u00e0 577.5N\/mm, chia gi\u00e1 tr\u1ecb n\u00e0y cho 3 l\u1edbp EP, th\u00ec \u0111\u1ed9 b\u1ec1n v\u1ea3i m\u1ed7i l\u1edbp EP l\u00e0 192.5N\/mm. Theo b\u1ea3ng m\u00f4 h\u00ecnh EP d\u01b0\u1edbi \u0111\u00e2y, EP200 l\u00e0 gi\u00e1 tr\u1ecb g\u1ea7n nh\u1ea5t, v\u00ec v\u1eady m\u00f4 h\u00ecnh EP g\u1ea7n nh\u1ea5t v\u1edbi PIW330\/3 l\u00e0 EP200, b\u0103ng t\u1ea3i 3 l\u1edbp, t\u1ee9c l\u00e0 b\u0103ng t\u1ea3i EP600\/3.<\/span><\/p>\n\n\n

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(Ph\u00e9p chuy\u1ec3n \u0111\u1ed5i tr\u00ean \u00e1p d\u1ee5ng cho nhi\u1ec1u lo\u1ea1i b\u0103ng t\u1ea3i kh\u00e1c nhau, ch\u1eb3ng h\u1ea1n nh\u01b0 b\u0103ng t\u1ea3i ch\u1ecbu nhi\u1ec7t<\/a>, b\u0103ng t\u1ea3i ch\u1ed1ng ch\u00e1y<\/a>, b\u0103ng t\u1ea3i g\u00e2n V<\/a> <\/strong><\/span>v\u00e0<\/span> b\u0103ng t\u1ea3i \u1ed1ng<\/a><\/strong> <\/span>v.v.)<\/span><\/p>\n\n\n

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B\u1ea3ng chuy\u1ec3n \u0111\u1ed5i gi\u1eefa h\u1ec7 th\u1ed1ng M\u1ef9 v\u00e0 h\u1ec7 M\u00e9t d\u01b0\u1edbi c\u00e1c h\u1ec7 s\u1ed1 an to\u00e0n kh\u00e1c nhau:<\/span><\/span><\/span><\/h2>\n\n\n\n
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H\u1ec7 s\u1ed1 an to\u00e0n c\u1ee7a b\u0103ng t\u1ea3i l\u00e0 g\u00ec?<\/span><\/a><\/strong><\/p>\n\n\n

C\u00e1ch t\u00ednh gi\u00e1 tr\u1ecb PIW c\u1ee7a b\u0103ng t\u1ea3i?<\/span><\/a><\/strong><\/p>\n\n\n

C\u00e1ch chuy\u1ec3n \u0111\u1ed5i b\u0103ng t\u1ea3i PIW sang b\u0103ng t\u1ea3i EP?<\/span><\/a><\/strong><\/p>\n\n\n

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V\u00ed d\u1ee5 chuy\u1ec3n \u0111\u1ed5i th\u1ef1c t\u1ebf:<\/span><\/span><\/span><\/h2>\n\n\n\n

B\u0103ng t\u1ea3i c\u00f3 \u0111\u1ed9 b\u1ec1n k\u00e9o 630N\/mm (630kN\/m), 3 l\u1edbp, \u0111\u01b0\u1ee3c m\u00f4 t\u1ea3 l\u00e0 EP630\/3<\/span><\/strong><\/a>, chuy\u1ec3n \u0111\u1ed5i sang PIW<\/span> s\u1ebd l\u00e0 630 X 0.5716 = 360 PIW<\/span> (h\u1ec7 s\u1ed1 an to\u00e0n 10:1). V\u1eady EP630\/3 theo thu\u1eadt ng\u1eef M\u1ef9 s\u1ebd l\u00e0 (3 l\u1edbp 360 PIW<\/span>). EP630\/3 th\u1ef1c ch\u1ea5t \u0111\u1ec1 c\u1eadp \u0111\u1ebfn 3 l\u1edbp v\u1ea3i EP200 v\u00e0 EP1000\/3 \u0111\u1ec1 c\u1eadp \u0111\u1ebfn 3 l\u1edbp v\u1ea3i EP315. <\/span>EP800\/4<\/span><\/a><\/strong> \u0111\u1ec1 c\u1eadp \u0111\u1ebfn 4 l\u1edbp v\u1ea3i EP200, v.v… B\u1ea1n c\u0169ng c\u00f3 th\u1ec3 chuy\u1ec3n \u0111\u1ed5i EP200 X 0.5716 = 114 PIW<\/span> m\u1ed7i l\u1edbp, EP315 X 0.5716 = 180 PIW<\/span> m\u1ed7i l\u1edbp, v.v.<\/span><\/p>\n\n\n

H\u00e3y hi\u1ec3u r\u00f5 nh\u01b0 sau:<\/span><\/p>\n\n\n

\"\"<\/figure><\/div>\n\n\n\n

So s\u00e1nh ti\u00eau chu\u1ea9n RMA v\u00e0 DIN cho b\u0103ng t\u1ea3i<\/span><\/a><\/strong><\/p>\n\n\n

Top 5 nh\u00e0 s\u1ea3n xu\u1ea5t b\u0103ng t\u1ea3i cao su t\u1ea1i Trung Qu\u1ed1c 2022-2023 (c\u00f3 website & th\u00f4ng tin li\u00ean h\u1ec7)<\/span><\/a><\/strong><\/p>\n\n\n

S\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa PSI v\u00e0 Mpa trong b\u0103ng t\u1ea3i v\u00e0 c\u00e1ch chuy\u1ec3n \u0111\u1ed5i gi\u1eefa ch\u00fang?<\/a><\/span><\/strong><\/p>\n\n\n

L\u1edbp b\u0103ng t\u1ea3i EP c\u00f3 ph\u1ea3i c\u00e0ng nhi\u1ec1u c\u00e0ng t\u1ed1t?<\/strong><\/span><\/a><\/p>\n\n\n

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V\u00ed d\u1ee5 chuy\u1ec3n \u0111\u1ed5i b\u0103ng t\u1ea3i c\u00e1p th\u00e9p:<\/span><\/span><\/span><\/h2>\n\n\n\n

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Ph\u1ea7n tr\u00ean \u00e1p d\u1ee5ng cho lo\u1ea1i v\u1ea3i nh\u01b0 <\/span>b\u0103ng t\u1ea3i cao su EP<\/span><\/a><\/strong> ho\u1eb7c b\u0103ng t\u1ea3i NN (Nylon), c\u00f2n \u0111\u1ed1i v\u1edbi b\u0103ng t\u1ea3i c\u00e1p th\u00e9p<\/span><\/a><\/strong>, ch\u1ec9 s\u1ed1 c\u01b0\u1eddng \u0111\u1ed9 \u0111\u1ee9t N\/mm c\u0169ng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng t\u1ea1i Hoa K\u1ef3, quy tr\u00ecnh th\u1eed nghi\u1ec7m c\u00f3 th\u1ec3 kh\u00e1c, v\u00ed d\u1ee5:<\/span><\/p>\n\n\n

Gi\u1ea3 s\u1eed b\u0103ng t\u1ea3i c\u00e1p th\u00e9p<\/span><\/span> c\u00f3 h\u1ec7 s\u1ed1 an to\u00e0n ti\u00eau chu\u1ea9n = 6.7:1 lo\u1ea1i c\u00e1p th\u00e9p l\u00e0 ST1000, th\u00ec c\u01b0\u1eddng \u0111\u1ed9 l\u00e0m vi\u1ec7c l\u00e0:<\/span><\/span><\/p>\n\n\n

ST1000 N\/mm \/ SF6.7 = 149.25 N\/mm c\u01b0\u1eddng \u0111\u1ed9 l\u00e0m vi\u1ec7c<\/span><\/span><\/strong><\/span><\/p>\n\n\n

Sau \u0111\u00f3 ch\u00fang t\u00f4i chuy\u1ec3n \u0111\u1ed5i t\u1eeb h\u1ec7 m\u00e9t sang h\u1ec7 inch cho c\u00e1p th\u00e9p ST1000 (\u0111\u01a1n s\u1ee3i):<\/span><\/p>\n\n\n

ST1000 \/ 6.7 = 149.25 N\/mm x 5.71 = 852 PIW ho\u1eb7c 852 pounds\/inch.<\/span><\/span><\/strong><\/span><\/p>\n\n\n

Th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt ti\u00eau chu\u1ea9n c\u00e1p th\u00e9p Sungda (\u0111\u01a1n s\u1ee3i)<\/span><\/strong><\/p>\n\n\n

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