4.8 na 8.8 kuri Bolts bisobanura iki?
Ibimenyetso kuri bolts, nka 4.8 na 8.8, byerekana amanota yimikorere ya bolts ikoreshwa muburyo bwo guhuza ibyuma. Aya manota yashyizwe mubyiciro birenga icumi harimo 3.6, 4.6, 4.8, 5.6, 6.8, 8.8, 9.8, 10.9, na 12.9. Muri ibyo, ibitsike bifite amanota 8.8 no hejuru yayo bikozwe mu byuma bya karuboni nkeya cyangwa ibyuma bya karuboni yo hagati byakorewe ubushyuhe (kuzimya no gushyuha), bakunze kwita imbaraga zikomeye. Ibisigaye bizwi nkibisanzwe bisanzwe.
Ikimenyetso cyerekana imikorere igizwe nibice bibiri byimibare yerekana izina ryimbaraga zingirakamaro hamwe numusaruro-kuri-tensile ugereranije nibintu bya bolt. Urugero:
- Bolt ifite amanota yo gukora ya 4.8 isobanura:
- Nominal tensile imbaraga zibikoresho bya bolt bigera kuri 400 MPa;
- Umusaruro-kuri-tensile igipimo cyibikoresho bya bolt ni 0.8;
- Kubwibyo, gutanga izina nominal imbaraga za bolt ni 400 × 0.8 = 320 MPa.
- Imbaraga-nini cyane ifite amanota ya 10.9, nyuma yo kuvura ubushyuhe, irashobora kugeraho:
- Nominal tensile imbaraga zibikoresho bya bolt bigera kuri MPa 1000;
- Umusaruro-kuri-tensile igipimo cyibikoresho bya bolt ni 0.9;
- Rero, nominal umusaruro wimbaraga yibikoresho bya bolt ni 1000 × 0.9 = 900 MPa.
Urwego rwimikorere ya bolts ni amahame yemewe ku rwego mpuzamahanga, yemeza ko bolts yo mu cyiciro kimwe ifite imikorere imwe ititaye kubintu cyangwa inkomoko yabyo, yemerera guhitamo igishushanyo gishingiye gusa kumanota yimikorere.
Ku bijyanye n’amanota yimbaraga, twakagombye kumenya ko amanota yiswe 8.8 na 10.9 ntabwo yerekeza kurwego rwo guhangayikishwa na 8.8 GPa na 10.9 GPa, ahubwo:
- Ku cyiciro cya 8.8, imbaraga za nominal ni 800 N / mm², naho umusaruro wizina ni 640 N / mm².
Imbaraga za Bolt zisanzwe zerekanwa na "XY", aho X100 ihwanye nimbaraga zingana za bolt, naho X100 * (Y / 10) bingana nimbaraga zumusaruro wa bolt (nkuko amasezerano abigenga: imbaraga zitanga / imbaraga zingana = Y / 10).
Kurugero, kumanota 4.8 bolt:
- Imbaraga zingana zaba 400 MPa;
- Imbaraga z'umusaruro zaba 400 * 8/10 = 320 MPa.
Byongeye kandi, ibyuma bitagira umuyonga akenshi birangwa nka A4-70 cyangwa A2-70, bifite ibisobanuro bitandukanye bihuye nibipimo bigenga ibyuma bidafite ingese.
Urakoze gusoma, niba ukeneye kubona byinshi mubyo tugomba kuguha urashobora gukurikira hano hepfo!