1. Cov khoom siv ntawm cov ncej ncej
Kev xaiv ntawm cov khoom siv ncej yog txiav txim siab los ntawm lub zog, nruj, kev puas tsuaj thiab kev tsim cov axis, thiab siv zog ua kom muaj kev lag luam. Qhov feem ntau siv axis yog 35, 45, thiab 50 high-quality carbon steels, uas yog siv dav tshaj plaws hauv 45 steel. Rau cov pa roj carbon zoo tib yam xws li Q235 thiab Q255, uas tsis tshua muaj loaded lossis tsis tseem ceeb. Rau kev ntxhov siab loj, axial loj, txwv qhov hnyav, lossis qee qhov tshwj xeeb yuav tsum tau siv rau hauv cov hlau alloy. Piv txwv li, 40CR alloy steel tuaj yeem siv rau qhov tseeb nruab nrab thiab siab dua. Tom qab qhov zoo yog hloov kho, cov khoom siv muaj cov khoom zoo txhua yam; xaiv cov hlau alloy xws li CR15 thiab 65MN tuaj yeem siv rau qhov raug siab thiab ua haujlwm tsis zoo. Tom qab qhov zoo thiab nto quenching, cov ntaub ntawv no muaj kev puas tsuaj zoo thiab qaug zog. Yog hais tias ib tug ncej ua hauj lwm nyob rau hauv high-ceev thiab hnyav load tej yam kev mob, xaiv low-carbon steel los yog 38CRMOA1A nkag ntawm 20CR, 20CRMNTI, 20MN2B thiab lwm yam tsawg-carbon, 20MN2B thiab lwm yam tsawg-carbon steels los yog 38CRMOA1A. Cov pa roj carbon steel, tom qab carburizing thiab quenching lossis nitrogen seepage kho, tsis tsuas yog muaj qhov tawv tawv, tab sis nws lub siab lub zog kuj zoo heev. Yog li ntawd, nws muaj zoo abrasion tsis kam, cuam tshuam toughness thiab qaug zog kuj. Vim yog qhov zoo ntawm kev ua haujlwm zoo thiab kev vibration txo kev ua haujlwm, lub pob thiab tus number case cam khwb cia hlau thiab siab siv cam khwb cia hlau feem ntau yog siv rau hauv cov ncej nrog cov qauv tsim. Tshwj xeeb tshaj yog lub ntiaj teb tsis tshua muaj tsim los ntawm kuv lub teb chaws -magnesium pob number case cam khwb cia hlau, uas muaj kev cuam tshuam zoo resilience, thiab kuj muaj qhov zoo ntawm kev txo qis, kev vibration absorption, thiab me me rhiab heev ntawm kev ntxhov siab.
2. Rough ntawm axis qhov chaw
Qhov ntxhib ntawm qhov axis yog qhov profile (cov khoom siv puag ncig) thiab forging. Loj loj, cov duab nyuaj kuj tuaj yeem muab pov tseg. Lub crankshafts nyob rau hauv lub internal combustion engine feem ntau yog siv rau casting. Qhov ntxhib los yog txias stretch ntawm lub ces kaum yog haum rau ib tug ncej ncej nrog ib tug du ncej los yog ib tug me me txoj kab uas hla. Tom qab lub forging blanks yog rhuab, cov ntaub so ntswg sab hauv ntawm cov hlau yog faib raws qhov chaw, yog li nws muaj siab tensile, dabtsi yog khoov thiab ntswj tsis kam, uas feem ntau yog siv rau cov axes tseem ceeb.
