Nika mara tsakiya
An kullum za'ayi a kan wani centerless grinder to nika excircle na workpiece. A lokacin niƙa, aikin ba a tsakiya da goyan bayan cibiyar ba, amma an sanya shi tsakanin dabaran niƙa da dabaran jagora, goyan bayan farantin da ke ƙasa da shi, kuma ana motsa shi don juyawa ta dabaran jagora. Lokacin da axis na jagorar dabaran da axis na nika dabaran aka gyara zuwa wani kwana na 1 ° ~ 6 °, da workpiece iya ta atomatik ciyar tare da axis yayin da juyawa, wanda ake kira ta hanyar.niƙa.
Ta hanyar nika za a iya amfani da kawai don nika cylindrical surface. A lokacin da yankan a centerless nika da aka soma, jagora dabaran axis da nika dabaran axis dole ne a gyara su zama a layi daya da juna, sabõda haka, workpiece yana da goyon baya a kan goyon bayan farantin ba tare da axial motsi, da kuma nika dabaran iya ci gaba da ƙetare abinci dangi. zuwa dabaran jagora. Yanke a cikin niƙa marar tsakiya na iya injin da aka kafa.Nika mara tsakiyaHakanan za'a iya amfani dashi don niƙa na ciki.
A lokacinsarrafawa, da'irar waje na workpiece tana da goyan baya akan abin nadi ko toshe mai ɗaukar hoto don tsakiya, kuma ana amfani da zoben jan hankali na eccentric don fitar da aikin don juyawa. Dabarar niƙa tana faɗaɗa cikin rami don niƙa pad. A wannan lokacin, ana amfani da da'irar waje azaman maƙasudin sakawa don tabbatar da cewa da'irar ciki da waje suna da hankali. Ana amfani da niƙa na ciki marar tsakiya don niƙa hanyar tseren ciki na ɗaukar zobe a kan injin niƙa na musamman don ɗaukar zobe.
Halayen sarrafawa
Idan aka kwatanta da sauran hanyoyin yankan, kamarjuyawa, niƙada kuma tsarawa, niƙa yana da halaye masu zuwa:
(1) Gudun niƙa yana da girma sosai, har zuwa 30m ~ 50m a sakan daya; The nika zafin jiki ne high, har zuwa 1000 ℃ ~ 1500 ℃; Tsarin niƙa yana ɗaukar ɗan lokaci kaɗan, kusan kashi dubu ɗaya na daƙiƙa ɗaya kawai. Goggo na son garma.
(2) High machining daidaito da kuma kananan surface roughness za a iya samu ta nika.
(3) Nika ba kawai zai iya sarrafa abubuwa masu laushi ba, kamar ƙarfe mara ƙarfi, simintin ƙarfe, da dai sauransu, amma kuma yana sarrafa ƙarfe mai tauri da sauran kayan aiki masu wuya waɗanda za a iya sarrafa su ba tare da kayan aikin ɗaure ba, kamar sassan lallausan ƙarfe, gami da ƙarfi da sauransu.
(4) Lokacin da ake niƙa, zurfin yankan yana da ƙanƙanta sosai, kuma ɗigon ƙarfe da za a iya cirewa a cikin bugun jini ɗaya yana da sirara sosai.
(5) Lokacin da ake niƙa, ɗimbin nau'ikan kwakwalwan kwamfuta masu kyau suna tashi daga motar niƙa, yayin da adadi mai yawa na kwakwalwan ƙarfe suna tashi daga aikin. Sawa tarkace da guntuwar ƙarfe za su yi lahani ga idon mai aiki, kuma ƙurar da ba a shaka cikin huhu ita ma za ta yi illa ga jiki.
(6) Saboda rashin inganci, rashin ajiya mara kyau, zaɓi mara kyau na ƙayyadaddun bayanai da ƙira, shigarwar eccentric, ko saurin ciyarwar injin niƙa, injin niƙa na iya karye, yana haifar da munanan raunuka ga ma'aikata.
(7) Lokacin aiwatar da ayyukan hannu kusa da dabaran niƙa, kamar kayan aikin niƙa, kayan aikin tsaftacewa ko hanyoyin gyaran dabaran da ba daidai ba, hannayen ma'aikata na iya taɓa ƙafar niƙa ko wasu sassa masu motsi na niƙa kuma su ji rauni.
(8) Matsakaicin amo da aka haifar yayin niƙa zai iya kaiwa fiye da 110dB. Idan ba a dauki matakan rage surutu ba, lafiyar kuma za ta yi tasiri.
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