Cov qauv xam cov khoom thauj ntawm saw hlau

Cov mis xam qhov hnyav ntawm cov saw hlau yog raws li nram no: Cov mis xam qhov hnyav ntawm cov saw hlau nqa? Cov lus teb: Cov mis yooj yim yog tus naj npawb ntawm cov ntu = tag nrho qhov ntev (hli) ÷ 14. 8 hli = 600 ÷ 14. 8 = 40. 5 (cov ntu) Qhov hnyav ntawm txhua ntu = Cov mis xam rau lub zog tensile ntawm cov saw hlau puag ncig yog dab tsi? Lub zog tawg ntawm cov saw hlau Kev suav lub zog tawg ntawm cov saw hlau phaj 1. Qhov kev ntxhov siab tsawg kawg nkaus ntawm 40Cr hlau yog S = 980N / mm2, qhov tsawg kawg nkaus ntawm thaj chaw hla ntawm ib qho txuas saw hlau yog nyob rau hauv B units (mm2), thiab qhov tsawg kawg nkaus ntawm lub zog tawg ntawm cov saw hlau yog nyob rau hauv F units (N). Cov mis F = S × B3. Kev suav ntawm cov saw hlau nrog tuab 10 thiab suab 80: B = 15 * 10 * 2 + 12. 5 * 10 * 2 = 550mm2F = 980 * 550 = 539000N Kev suav ntawm cov saw nrog tuab 16 thiab suab 80: B = 15 * 16 * 2 + 12 .5 * 16 * 2 = 880mm2F = 980 * 880 = 862400N Kev suav saw nrog tuab 16 thiab suab 120: B = 23. 5 * 16 * 2 + 22. 5 * 16 * 2 = 1472mm2F = 980 * 1472 = 1442560N