Lub zog ntawm qhov pwm feem ntau yog qhov tseem ceeb tshaj plaws rau kev hnav lub cev. Feem ntau, siab zog qhov nyuaj ntawm lub pwm, qhov hnyav hnav, thiab qhov zoo dua qhov ua haujlwm hnyav. Tsis tas li ntawd, kev hnav ris tsho kuj muaj feem xyuam rau hom, ntau, duab, qhov loj thiab kev faib tawm ntawm cov khoom siv hauv cov khoom.
1. Muaj zog toughness
Feem ntau ntawm kev ua hauj lwm ntawm lub pwm yeej phem heev, thiab qee zaus muaj kev txom nyem los ntawm kev cuam tshuam loj heev, ua rau txhaws tawg. Yuav kom tiv thaiv tau qhov pwm ntawm ntu tawm ntawm lub sijhawm ua haujlwm tas li, pwm yuav tsum muaj lub zog thiab muaj zog. Lub toughness ntawm pwm nyob ntawm tsuas yog cov ntsiab lus ntawm carbon, grain loj thiab microstructure ntawm cov khoom.
2. Coj kev hnyav; pwm accessories
Thaum lub plhaub dawb paug hauv cov pwm ntawm lub pwm, nws ntws thiab swb raws cov kab noj hniav, ua rau muaj kev sib sib zog nqus ntawm cov kab noj hniav thiab qhov dawb, uas ua rau lub pwm tsis poob vim yog hnav. Yog li ntawd, txoj kev hnav tsis txaus ntawm cov khoom yog ib qho tseem ceeb thiab tseem ceeb ntawm cov pwm.
3. Nkees nkig kev ua tau zoo
Thaum lub sijhawm ua haujlwm, cov pwm feem ntau ua rau qaug zog ntawm qhov teebmeem hauv lub sijhawm ntev-ntev ntawm kev ntxhov siab cyclic. Daim ntawv muaj lub zog me me ntau feem ntau nkees nkees, tensile qaug zog raug hu rau qaug zog tawg thiab khoov qaug zog qaug zog.