Hauv kev siv, pist pas nrig yog raug hloov mus rau lwm qhov. Lub sealing khoom reciprocally rubs lub nto ntawm φ50mm × 770mm, yog li lub hardness thiab coj tsis zoo yuav tsum tau. Lub piston pas nrig yog tsim los ntawm 38CrMoALA khoom, thiab φ50mm × 770mm tshooj yog raug quenching thiab tempering kho thiab nitriding nto. Cov tub ntxhais hnyav yog 28 ~ 32HRC, qhov siab ntawm nitriding txheej yog 0.2 ~ 0.3 hli, thiab qhov tawv tawv yog 62 ~ 65 HRC. Nyob rau hauv no txoj kev, tus pas piston muaj ob qho tib si toughness thiab zoo coj kuj.
Tus qauv ntawm piston pas nrig yog yooj yim, tab sis qhov ntev mus rau qhov sib piv yog loj heev. Nws yog nyob rau ntawm lub taub hau elongated ncej. Yuav kom paub tseeb tias qhov kev txiav txim siab ua tiav, lub roughing thiab xov tsheb yog sib cais thaum lub sij hawm tig, thiab cov kev sib tw thiab cov tsheb zoo siv nrog lub cuab tam siv los txo cov kev ua. Thaum lub workpiece deformed, qhov chaw nruab nrab yog siv thaum ua haujlwm cov xov ntawm ob hnub. Hauv kev xaiv ntawm qhov kev xaiv, yuav kom paub tseeb tias kev ua siab ntev ntawm kev sib raug zoo thiab qhov kev sib nrig sib cais ntawm txhua qhov, tag nrho cov kev ua haujlwm yog qhov muaj ob qhov chaw, uas ua raws li tus qauv ntawm kev sib tw.
Thaum cov piston qws grinds hauv txheej ntu, qhov workpiece yog nws ua rau riam yuav tsum elastically deformed, uas cuam tshuam rau cov neeg ntawm piston pas nrig. Yog li ntawd, qhov chaw nruab nrab yuav tsum tau kho thaum lub sij hawm ua, thiab lub qhov qhov yuav tsum tau ntxuav, qhov ceev ntawm lub qhov thiab qhov taub yuav tsum tsim nyog, thiab zoo lubrication yuav tsum tau ensured. Kev sib tsoo log feem ntau raug xaiv: abrasive dawb corundum (WA), particle size 60 #, mos los yog nruab nrab thiab ceramic nyiaj hauv hardness, thiab lub dav ntawm cov hniav sib tsoo yuav tsum narrower txo cov radial sib tsoo force, them nyiaj rau cov xaiv kev sib tsoo thaum lub sij hawm ua. Hauv particular, qhov sib tsoo qhov tob yog me me.www.xhychromerod.com