Tsarin Aikace-aikacen Babban Mitar Quenching Kayan aiki akan Fin Fin na Injin Mota

Piston Pin (Sunan Turanci: Piston Pin) fil ɗin silindi ne wanda aka ɗora akan siket ɗin piston. Sashinsa na tsakiya ya ratsa ta cikin ƙaramin ramin kai na sandar haɗawa don haɗa fistan da igiyar haɗawa da isar da ƙarfin iskar gas ɗin da fistan ke ɗauka don haɗawa. Domin rage nauyi, gabaɗaya fil ɗin piston ana yin su ne da ƙarfe mai inganci kuma an yi su da rami. Siffar sifar filogi mai sauqi qwarai, madaidaicin silinda mai kauri mai kauri. Ramin ciki yana da siffa silinda, siffar mazugi mai sassa biyu da kuma siffar hade. Ramin cylindrical yana da sauƙin sarrafawa, amma yawan fitin fistan ya fi girma; yawan fitin fistan na ramin mazugi mai sassa biyu ya fi ƙanƙanta, kuma saboda lokacin lanƙwasawa na fil ɗin piston shine mafi girma a tsakiya, yana kusa da katako na daidaitaccen ƙarfi, amma an ɗora shi. sarrafa ramin yana da wahala. A cikin wannan ƙira, an zaɓi fil ɗin piston tare da ainihin rami na ciki.

Sharuɗɗan sabis:

(1) Ƙarƙashin yanayin zafi mai girma, tsayayya da tasiri mai ƙarfi na lokaci-lokaci, lankwasawa da shearing

(2) Fuskar fil tana ɗaukar mafi girman gogayya da lalacewa.

1. Yanayin kasawa: saboda damuwa na lokaci-lokaci, raunin gajiya da lalacewa mai tsanani yana faruwa.

Bukatun aiki:

2. Piston fil yana ɗaukar nauyin tasiri mai girma na lokaci-lokaci a ƙarƙashin yanayin zafi mai zafi, kuma saboda piston fil yana motsawa a wani karamin kusurwa a cikin ramin fil, yana da wuya a samar da fim mai lubricating, don haka yanayin lubrication ba shi da kyau. A saboda wannan dalili, piston fil dole ne ya sami isasshen ƙarfi, ƙarfi da juriya, kuma taro ya kamata ya zama ƙarami sosai. Fin da ramin fil ya kamata su sami izinin da ya dace da ingantaccen yanayin ƙasa. A ƙarƙashin yanayi na al’ada, taurin fil ɗin piston yana da mahimmanci musamman. Idan fil ɗin piston yana lanƙwasa kuma ya lalace, kujerar fil ɗin na iya lalacewa;

(2) Yana da isasshen tasiri taurin;

(3) Yana da karfin gajiya sosai.

3. Bukatun fasaha

Bukatun fasaha na Piston:

① Dukan saman fistan fil an carburized, kuma zurfin carburized Layer shine 0.8 ~ 1.2mm. Ya kamata a canza Layer ɗin carburized daidai gwargwado zuwa ainihin tsarin ba tare da canji kwatsam ba.

②Taurin saman shine 58-64 HRC, kuma bambancin taurin akan fil ɗin piston ɗaya yakamata ya zama ≤3 HRC.

③Taurin piston fil core shine 24 zuwa 40 HRC.

④ Microstructure na carburized Layer na piston fil ya kamata ya zama martensite mai kyau na allura, yana ba da izinin ƙaramin adadin daidaitattun nau’in granular granular, kuma babu allura-kamar kuma ci gaba da rarraba cibiyar sadarwa na free carbides. Siffar allura na ainihin yakamata ya zama ƙaramin-carbon martensite da ferrite.

Dangane da abubuwan da ake buƙata da buƙatu na sama, ana buƙatar fasaha da kayan aiki masu dacewa. Bayan carburizing, carburized karfe piston fil yana kashe kuma yana fushi a ƙananan zafin jiki. Piston fil tare da mafi girman buƙatun aiki ana kula da su ta hanyar quenching na biyu da zafin rai. Manufar quenching na farko shine don kawar da ciminti na cibiyar sadarwa a cikin simintin da aka yi da kuma tsaftace ainihin tsarin; na biyu quenching shi ne don tace infiltration Layer kungiyar da kuma sanya permeable Layer samun high tauri. Piston fil tare da mafi girman alloying abubuwa ya kamata a sha cryogenic magani bayan carburizing da quenching don rage adadin riƙe austenite a cikin carburized Layer, musamman piston fil cewa bukatar girma kwanciyar hankali, da kuma cryogenic magani ake bukata don sarrafa riƙe austenite yawa.