Crankshaft ndi imodzi mwazinthu zofunika kwambiri mu injini yoyaka mkati, ndipo moyo wake wautumiki nthawi zambiri umatsimikizira moyo wautumiki wa injini yoyaka moto. Mu 1920, American Clark Company idagwiritsa ntchito ukadaulo woumitsa makina omwe adapangidwa posachedwapa kuti azitha kuuma magazini a crankshaft, zomwe zidathandizira kwambiri kukana kwa crankshaft, potero kuwongolera moyo wogwira ntchito wa injini yoyaka mkati.

M'zaka makumi angapo zapitazi, kutopa kwapang'onopang'ono kwakhala kodziwika kwambiri, ndipo magwero otopa amapezeka kwambiri pakona zozungulira za crankshaft ya magazini yolumikizira ndodo. Pachifukwa ichi, opanga ambiri apereka zofunikira kuti apititse patsogolo kutopa kwa crankshaft. Chinsinsi chothandizira kutopa kwa crankshaft ndikuwonjezera kupsinjika kotsalira kwa fillet ya crankshaft. Kukulitsa kuuma kwa ma crankshaft fillets (kuphatikiza ma magazine) ndiyo njira yabwino yopezera zovuta zotsalira zotsalira za> 600MPa zamafuta. Kampani ina ya ku Japan inayesa kutopa motsatizana pa injini yoyaka moto ya mkati mwa crankshaft. Kuyesaku kunatsimikizira kuti crankshaft yozungulira yozungulira ili ndi mphamvu yakutopa kwambiri (996MPa), mphamvu yozungulira yozungulira ya crankshaft ndi yachiwiri (890MPa), ndipo crankshaft ya nitrided ndi yachitatu (720MPa). Makampani aku America alinso ndi data yofananira. Crankshaft fillet quenching nthawi zambiri amagwiritsa ntchito "half-turn inductor" quenching, yomwe imadziwikanso kuti Elotherm (Elotherm) quenching njira. Ndikuti kachipangizo kamene kamamangiriridwa pa nyuzipepala, ndipo crankshaft imatenthedwa ndipo madzi amazimitsidwa panthawi yozungulira (palinso nkhani yomwe crankshaft magazine imatenthedwa ndi kutentha kozimitsa ndikusinthidwa kukhala dziwe kuti lizizizira ndi kuzimitsa). Njirayi sikuti imangothandizira kulowa ndi kutuluka kwa sensa ya crankshaft, imathandizira magwiridwe antchito a chida chozimitsira makina, komanso imathetsa ming'alu ya bowo lamafuta, m'lifupi mwake m'lifupi mwamalo owumitsidwa, makulidwe osagwirizana a wosanjikiza wowuma Mavuto monga akulu. kusintha.

Anthu am'makampani nthawi zambiri amakhulupirira kuti njira ya Eluosen quenching ndikupita patsogolo kwakukulu kwaukadaulo wozimitsa crankshaft. Deta ikuwonetsa kuti kuuma kwa injini za crankshaft kumatha kukulitsa moyo wa injini mpaka maola 8000, pomwe kuzimitsidwa kwa magazini ndi ma fillets kumatha kukulitsa moyo wa injini mpaka maola 10,000. Ukadaulo wofunikira womwe uyenera kuthetsedwa kuti ukwaniritse kuzimitsa fillet ndiukadaulo wogawa mphamvu. Crankshaft "theka-kutembenukira inductor" quenching kumafuna umisiri ambiri, monga pafupipafupi kutembenuka mphamvu, quenching makina chida ndi inductor, etc. matekinoloje amenewa ndi ofunika kwambiri, koma matekinoloje amenewa poyamba anathetsa m'dziko langa mu 1980 oyambirira.

Mwachiwonekere, kutentha kozimitsa kwa fillet ya crankshaft kuyenera kuchitidwa bwino. Mphamvu yotentha ya mkati mwa crank ndi kunja kwa crank iyenera kusinthidwa, ndiko kuti, mphamvu ya mkati mwa crank iyenera kukhala yayikulu, ndipo mphamvu ya kunja kwa crank iyenera kukhala yaying'ono. Tekinoloje iyi imatchedwa ukadaulo wogawa mphamvu. Ngodya zozungulira za crankshafts zazikulu ndi zazing'ono zimazimitsidwa. Ukadaulo umapereka mphamvu 100% pakuwotcha mkati mwa crank, ndi 60% (kapena 70%) mphamvu pakuwotcha kunja kwa crank, ndipo crankshaft ikazungulira, ngodya imawonjezeka (kapena kutsika) ndi kuchuluka kwake. iliyonse 15 ° Mphamvu.