Tsis muaj cov kev cai tshwj xeeb rau cov khoom siv ntawm qib 8.8 bolts, tsuas yog qhov ntau ntawm cov tshuaj sib xyaw tso cai siv tau raug teev tseg. Ntev npaum li cov khoom ua tau raws li qhov yuav tsum tau ua nyob rau hauv qhov kev teev tseg no, nws tuaj yeem siv los ua cov khoom siv rau qib 8.8 lub zog muaj zog bolts. Txawm li cas los xij, ntau tus kws tshaj lij tseem yuav suav cov qauv ntawm qib 8.8 bolts yog qhov tseem ceeb rau kev xaiv cov khoom siv.
Yuav kom ua tau raws li qhov yuav tsum tau ua ntawm qib 8.8 bolts nrog cov kev xav tau sib txawv, cov khoom siv yuav tsum tau txais kev kho cua sov tshwj xeeb kom ua tiav cov yam ntxwv hauv qab no:
1. Lub nominal tensile lub zog ntawm cov khoom siv ntsia liaj qhov rooj nce mus txog 640MPa;
2. Qhov sib piv ntawm qhov tawm los-rau-lub zog ntawm cov khoom siv ntsia liaj qhov rooj yog 0.8;
3. Lub nominal yield zog ntawm cov khoom siv ntsia liaj qhov rooj ncav cuag 640 × 0.8=800MPa qib;
4. Thaum xaiv cov ntaub ntawv, qib 8.8 hexagonal bolts tuaj yeem siv 1035ACR (muaj feem xyuam rau M10 thiab qis dua) thiab 1040ACR (muaj feem rau M12 thiab siab dua), CH38F, 1045ACR, 1039, 10B21, 10B38, thiab lwm yam ntaub ntawv.
5. Qib 8.8 hexagon socket taub hau bolts tuaj yeem siv CH38F, 1039, 10B21 (muaj feem xyuam rau M10-M12), 10B33 (muaj feem rau M14), 10B38 (tseem tau rau M12-M24), 10licableAC rau M10 thiab qis dua) thiab 1040ACR (muaj feem xyuam rau M12 lossis siab dua) thiab lwm yam ntaub ntawv;
6. Cov discs siv hauv cov khoom siv carbon steel tuaj yeem ua los ntawm cov khoom sib txawv raws li ntau hom. Piv txwv li, qib 4.8 hexagonal bolts tuaj yeem siv 1008K, 1010, 1015K thiab lwm yam ntaub ntawv, thiab qib 6.8 hexagonal bolts tuaj yeem siv 1032, 1035, 1040, CH38F, 1039, thiab lwm yam. Khoom siv, qib 6.8 tuaj yeem siv MAC 0 thiab hauv qab) thiab 1040ACR (muaj feem xyuam rau M12 thiab siab dua), CH38F, 1045ACR, 1039, 10B21, 10B33, 10B38 thiab lwm yam ntaub ntawv. Qib 8.8 hexagon socket bolts tuaj yeem siv CH38F, 1039, 10B21 (muaj feem xyuam rau M10-M12), 10B33 (muaj feem rau M14), 10B38 (muaj feem xyuam rau M12-M24), 1035ACR (applicable hauv qab no ) thiab 1040ACR (muaj feem xyuam rau M12 thiab siab dua) thiab lwm yam ntaub ntawv, 10.9 qib hexagonal bolts siv tau 1045ACR, 10B38 thiab lwm yam ntaub ntawv. Qib 8 thiab siab dua cov txiv ntoo tuaj yeem siv cov ntaub ntawv xws li 1015 (M<16) and CH38F (M≥16). Grade 10 nuts can use materials such as CH38F, 1039, 10B21, 10B33, etc. Grade 12 nuts Caps can be made of materials such as 1039, 10B21, 10B33 and 10B38; carriage screws can be made of materials such as 1008, 1010 and 1015; hexagonal flange bolts can be made of CH38F, 1039, 10B21, 10B33, 10B38 and other materials; hexagonal wood screws can be made of 1008K, 1010 and other materials, self-tapping nails, wallboard nails, drilled nails, plywood nails can use 1018, 1022, CH22A and other materials.
Kev nkag siab txog cov khoom siv thiab kev ua tau zoo ntawm qib 8.8 bolts tuaj yeem pab koj xaiv cov khoom tsim nyog kom tau raws li koj cov kev xav tau engineering.
