Gudanar da aikin niƙa na ƙafafun niƙa ta hanyar gauraya granularity na abrasives

Nika tsari ne na injina wanda ake amfani da dabaran niƙa mai ƙyalli (GS, kamar yadda aka bayar a cikin Fig.1) don cire kayan a wani saurin juyawa [1]. Ƙaƙwalwar niƙa ta ƙunshi abrasives, wakili mai ɗauri, filler da pores, da dai sauransu. Tauri, ƙarfi, fractural halayya, lissafi na abrasive suna da gagarumin tasiri a kan nika yi (ikon nika, surface mutuncin machined workpiece, da dai sauransu) na nika dabaran [2, 3].

Hoto 1.A hankula nika ƙafafun da gauraye granularity na abrasives.

An gwada ƙarfin zirconia alumina (ZA) tare da granularity na F14 ~ F30. Abubuwan da ke cikin abrasive na F16 ko F30 a cikin shirye-shiryen GS an raba su zuwa maki biyar daga babba zuwa ƙasa: ultrahigh (UH), high (H), tsakiya (M), ƙananan (L), da matsananciyar ƙananan (EL). An gano cewa karfin murkushe Weibull na F14, F16 da F30 na ZA sun kasance 198.5 MPa, 308.0 MPa da 410.6 MPa, wanda ke nuna cewa karfin ZA ya karu tare da raguwar girman grit. Mafi girma na Weibull modulusmya nuna ƙarancin bambance-bambance tsakanin barbashi da aka gwada [4-6]. Themƙimar ta ragu tare da raguwar girman grit abrasives, yana nuna cewa bambance-bambancen tsakanin abubuwan da aka gwada sun zama mafi girma tare da raguwar grit abrasive [7, 8]. Tun da lahani da yawa na abrasive ya kasance akai-akai, ƙananan abrasives suna da ƙananan lahani da kuma ƙarfin da ya fi girma, don haka ya sa mafi kyawun abrasives ya fi wuya a karya.

Hoto2. Halin halin damuwa na Weibulls₀da Weibull modulesmdomin daban-daban granularities na ZA.

An ɓullo da ingantaccen samfurin lalacewa na ingantaccen tsarin sabis [9], kamar yadda aka kwatanta a cikin siffa 3. A ƙarƙashin kyakkyawan yanayi, abrasive yana da ƙimar amfani mai yawa kuma GS yana nuna kyakkyawan aikin niƙa [3]. A ƙarƙashin nauyin niƙa da aka ba da ƙarfi da ƙarfin wakili na ɗaure, an canza manyan hanyoyin lalacewa daga lalacewa da ƙarancin ƙima don F16 zuwa lalacewa mai lalacewa kuma an fitar da shi don mallakar F30 zuwa bambanci a cikin ƙarfin murƙushewa [10,11]. Rashin lalacewa ya haifar da lalata GS da kaifin kai wanda aka cire ta hanyar abrasive zai iya cimma daidaiton yanayi, don haka yana haɓaka ƙarfin niƙa sosai [9]. Don ci gaba da haɓaka GS, ƙarfin murƙushewa, ƙarfin wakili mai ɗauri da nauyin niƙa, da kuma tsarin lalacewa na haɓakar abrasives, yakamata a daidaita su da sarrafa su don haɓaka ƙimar amfani da abrasives.

Hoto3.Kyakkyawan tsarin sabis na abrasive

Kodayake aikin niƙa na GS yana tasiri da abubuwa da yawa, irin su ƙarfin murƙushewa, ƙarfin wakili mai ɗaure, nauyin niƙa, halayen yanke abrasive, yanayin niƙa, da dai sauransu, binciken hanyoyin daidaitawa na granularities na abrasives na iya ba da babban tunani akan ƙira da masana'antar GS.

Magana 

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