Uhlelo lokusebenza lwe High Frequency eqeda Izisetshenziswa eziku-Piston Pins of Automobile Engines

I-Piston Pin (igama lesiNgisi: Iphinikhodi ye-Piston) iyiphinikhodi eyisilinda efakwe esiketini se-piston. Ingxenye yayo ephakathi idlula embotsheni encane yekhanda yenduku yokuxhuma ukuze ixhume ipiston nenduku yokuxhuma futhi idlulisele amandla egesi ibhere le-piston ukuze lixhume. Ukuze kwehliswe isisindo, izikhonkwane ze-piston ngokuvamile zenziwe ngensimbi ye-alloy yekhwalithi ephezulu futhi zenziwe zangenalutho. Isakhiwo sephinikhodi yepulaki silula kakhulu, ngokuyisisekelo isilinda esingenalutho esinodonga oluwugqinsi. Imbobo engaphakathi inomumo oyisilinda, umumo wekhoni osikiwe onezigaba ezimbili kanye nomumo ohlanganisiwe. Izimbobo ze-cylindrical kulula ukucubungula, kodwa isisindo sephini le-piston sikhulu; Isisindo sephinikhodi ye-piston ye-cone encishisiwe yezingxenye ezimbili incane, futhi ngenxa yokuthi umzuzu wokugoba wephinikhodi ye-piston inkulu kakhulu phakathi, iseduze ne-beam yamandla alinganayo, kodwa i-tapered. Ukucubungula imbobo kunzima. Kulo mklamo, iphinikhodi ye-piston enembobo yangempela yangaphakathi ikhethiwe.

Izimo zesevisi:

(1) Ngaphansi kwezimo zokushisa eziphakeme, ukumelana nomthelela oqinile wezikhathi ezithile, ukugoba nokugunda

(2) Indawo yephini ithwala ukungqubuzana nokuguga okukhulu.

1. Imodi yokwehluleka: ngenxa yokucindezeleka ngezikhathi ezithile, ukuphuka kokukhathala kanye nokuguga okuqinile kwendawo kwenzeka.

Izidingo zokusebenza:

2. Iphinikhodi ye-piston ithwala umthwalo omkhulu womthelela wezikhathi ezithile ngaphansi kwezimo zokushisa eziphezulu, futhi ngenxa yokuthi iphinikhodi ye-piston ijika nge-engeli encane emgodini wephini, kunzima ukwenza ifilimu yamafutha okugcoba, ngakho izimo zokugcoba zimbi. Ngenxa yalesi sizathu, iphinikhodi ye-piston kufanele ibe nokuqina okwanele, amandla nokumelana nokugqoka, futhi ubukhulu kufanele bube buncane ngangokunokwenzeka. Iphinikhodi kanye nembobo yokukhonkwane kufanele kube nendawo efanele yokungena kanye nekhwalithi enhle yangaphezulu. Ngaphansi kwezimo ezijwayelekile, ukuqina kwephinikhodi ye-piston kubaluleke kakhulu. Uma iphinikhodi yepiston igobile futhi ikhubazekile, isihlalo sephinikhodi singalimala;

(2) Inokuqina komthelela owanele;

(3) Inamandla amakhulu okukhathala.

3. Izidingo zobuchwepheshe

Izidingo zobuchwepheshe zephinikhodi ye-Piston:

①Indawo yonke yephinikhodi ye-piston i-carburized, futhi ukujula kwesendlalelo se-carburized ngu-0.8 ~ 1.2mm. Isendlalelo se-carburized kufanele siguqulelwe ngokulinganayo esakhiweni esiyinhloko ngaphandle koshintsho olungazelelwe.

②Ukuqina kwendawo kungu-58-64 HRC, futhi umehluko wokuqina kuphinikhodi efanayo yepiston kufanele ube ngu-≤3 HRC.

③Ukuqina kwephinikhodi ye-piston kungu-24 kuya ku-40 HRC.

④ I-microstructure yesendlalelo se-carburized yephinikhodi ye-piston kufanele ibe yi-finele needle martensite, evumela inani elincane lama-carbides ahlanzekile ahlukaniswe ngokulinganayo, futhi kungabikho ukusatshalaliswa okufana nenaliti nokuqhubekayo njengenethiwekhi kwama-carbides amahhala. Ukuma kwenaliti yomgogodla kufanele kube i-low-carbon martensite ne-ferrite.

Ukuphendula lezi zidingo nezidingo ezingenhla, kudingeka ubuchwepheshe obufanele kanye nemishini. Ngemuva kokungcwatshwa kwe-carburizing, iphinikhodi ye-carburized steel piston iyacishwa futhi ifudumale ekushiseni okuphansi. Izikhonkwane ze-piston ezinezidingo zokusebenza eziphezulu ziphathwa ngokucisha kanye nokufutheka. Inhloso yokucisha kokuqala iwukuqeda usimende wenethiwekhi ongqimbeni lukasimende futhi ucwenge isakhiwo esiwumgogodla; i-quenching yesibili iwukucwenga inhlangano ye-Infiltration Layer futhi wenze isendlalelo esivumayo sithole ubulukhuni obuphezulu. Izikhonkwane ze-piston ezinezici eziphezulu ze-alloying kufanele zithole ukwelashwa kwe-cryogenic ngemva kokungcwatshwa kwe-carburizing kanye nokucisha ukuze kuncishiswe inani le-austenite egciniwe kungqimba lwe-carburized, ikakhulukazi izikhonkwane ze-piston ezidinga ukuzinza kwe-dimensional, kanye nokwelashwa kwe-cryogenic kuyadingeka ukulawula ubuningi be-austenite obugciniwe.