Inkqubo yokusetyenziswa kwe UkuCima rhoqo Izixhobo kwiPiston Izikhonkwane zeeNjini zeMoto

I-Piston Pin (igama lesiNgesi: i-Piston Pin) yi-cylindrical pin efakwe kwi-skirt ye-piston. Inxalenye yayo ephakathi idlula kumngxuma omncinci wentloko yentonga yokudibanisa ukudibanisa ipiston kunye nentonga yokudibanisa kunye nokuhambisa amandla egesi ukuba i-piston ithwale ukudibanisa. Ukuze kuncitshiswe ubunzima, izikhonkwane zepiston zenziwe ngentsimbi ekumgangatho ophezulu wealloy kwaye zenziwe ingxolo. Ubume bobume beplagi yeplagi ilula kakhulu, ngokusisiseko isilinda esinomgongxo otyebileyo. Umngxuma wangaphakathi unemilo ye-cylindrical, imilo ye-cone ene-cone enecandelo-ebini kunye nemilo edibeneyo. Imingxuma ye-Cylindrical kulula ukuyiqhuba, kodwa ubunzima bepiston bukhulu; ubunzima bepiston yepiston yomngxuma wekhowuni enamacandelo amabini incinci, kwaye ngenxa yokuba umzuzu wokugoba wepiston ungowona mkhulu phakathi, isondele kumqadi wamandla alinganayo, kodwa i-tapered. Ukulungiswa komngxuma kunzima. Kulo yilo, ipiston yepiston kunye nomngxuma wangaphakathi wokuqala ukhethiwe.

Iimeko zoncedo:

(1) Phantsi kweemeko zobushushu obuphezulu, melana nefuthe elinamandla lexesha, ukugoba kunye nokucheba

(2) Umphezulu we-pin uthwala ukukhuhlana okukhulu kunye nokuguga.

1. Imodi yokungaphumeleli: ngenxa yoxinzelelo lwexesha, ukuphuka kokukhathala kunye nokugqithisa okukhulu komphezulu kwenzeka.

Iimfuneko zokusebenza:

2. I-piston pin inomthwalo omkhulu wempembelelo yexesha phantsi kweemeko eziphezulu zokushisa, kwaye ngenxa yokuba i-piston pin ijika kwi-angle encinci kwi-pin ye-pin, kunzima ukwenza ifilimu yeoli yokuthambisa, ngoko ke iimeko zokuthambisa zimbi. Ngenxa yesi sizathu, ipiston yepiston kufuneka ibe nokuqina okwaneleyo, amandla kunye nokumelana nokunxiba, kwaye ubunzima kufuneka bube buncinci ngokusemandleni. Iphini kunye nomngxuma we-pin kufuneka ube nokucoceka okufanelekileyo kunye nomgangatho omhle womphezulu. Kwiimeko eziqhelekileyo, ukuqina kwepiston kubaluleke kakhulu. Ukuba ipiston ipiston igobile kwaye ikhubazekile, isihlalo sepiston sinokonakala;

(2) Inefuthe elaneleyo lokuqina;

(3) Inamandla aphezulu okudinwa.

3. Iimfuno zobugcisa

Iimfuno zobugcisa zepiston:

①Umphezulu wonke wepiston wepiston ufakwe i-carburized, kwaye ubunzulu be-carburized layer yi-0.8 ~ 1.2mm. Uluhlu lwe-carburized kufuneka lutshintshwe ngokufanayo kwisakhiwo esisisiseko ngaphandle kokutshintsha ngokukhawuleza.

②Ubunzima bomphezulu yi-58-64 HRC, kunye nokwahlukana kobunzima kwipiston enye yepiston kufuneka ibe ≤3 HRC.

③Ubulukhuni bepiston core yi-24 ukuya kwi-40 HRC.

④ Ubume be-microstructure ye-carburized layer ye-piston pin kufuneka ibe yinaliti entle ye-martensite, evumela inani elincinci le-carbides ecocekileyo esasazwe ngokulinganayo, kwaye kungabikho usasazo olufana nenaliti kunye noluqhubekayo lwenethiwekhi-njenge-carbides yamahhala. Imilo yenaliti ye-core kufuneka ibe yi-low-carbon martensite kunye ne-ferrite.

Ukuphendula kwiimfuno kunye neemfuno ezingentla, iteknoloji efanelekileyo kunye nezixhobo ziyafuneka. Emva kokungcwatywa kwe-carburized steel piston pin iyacinywa kwaye inomsindo ophantsi. Izikhonkwane zepiston ezineemfuno eziphezulu zokusebenza ziphathwa ngokucinywa kwesibini kunye nokuvutha. Injongo yokucima kokuqala kukuphelisa i-cementite yenethiwekhi kwinqanaba le-cemented kunye nokucoca isakhiwo esingundoqo; ukucima okwesibini kukucokisa ukungeniswa Layer umbutho kwaye wenze umaleko permeable ufumane ubulukhuni eliphezulu. Izikhonkwane zepiston ezinezinto eziphezulu ze-alloying kufuneka zenze unyango lwe-cryogenic emva kwe-carburizing kunye nokucima ukunciphisa ubuninzi be-austenite egciniweyo kwi-carburized layer, ngakumbi izikhonkwane zepiston ezifuna uzinzo lwe-dimensional, kunye nonyango lwe-cryogenic luyafuneka ukulawula ubuninzi obugciniweyo be-austenite.