Ungayisika njani iTungsten carbide rod?

Siyazi ukuba ubunzima besixhobo sesixhobo ngokwaso kufuneka bube phezulu kunobunzima bomsebenzi oza kwenziwa. Ukuqina kwe-Rockwell ye-carbide enesamente ngokuqhelekileyo kujikeleze i-HRA78 ukuya kwi-HRA90. Ukuba ufuna ukufaka amanqaku okanye ukusika iirodi ze-tungsten carbide ngempumelelo, ezi ndlela zi-4 zilandelayo zinokusebenza, ezizezi: ukucola ivili lokusila, ukwenziwa kwe-machining nge-super hard material, electrolytic machining(ECM), kunye ne-electric discharge machining(EDM).

1. Sika intonga ye-carbide ingenanto ngokusila ivili

Ukusukela ngoku ukuya phambili, izixhobo ezinokuqhuba izikhewu ze-carbide ikakhulu zibhekisa kwi-poly-crystalline cubic boron nitride (PCBN) kunye nedayimane ye-poly-crystalline (PCD).

Izinto eziphambili zokugaya amavili yi-silicon carbide eluhlaza kunye nedayimane. Kuba ukugaya i-silicon carbide kuya kuvelisa uxinzelelo lwe-thermal olugqithisa umda wamandla we-carbide enesamente, ukuqhekeka komphezulu kwenzeka kakhulu, okwenza i-silicon carbide ingabi lolona khetho lufanelekileyo lokwenza umphezulu onokuthi uqinisekiswe.

Nangona ivili lokusila le-PCD lifanelekile ukugqiba yonke imisebenzi ukusuka ekugxininiseni ukuya ekugqityweni kwi-carbide blanks, ukuze kuncitshiswe ilahleko yevili lokusila, i-carbide blanks iya kucutshungulwa kwangaphambili ngendlela yomatshini wombane, emva koko wenze i-semi-finishing kunye ne-fine- ukugqiba ngokusila ivili ekugqibeleni.

2. Sika ibha ye-carbide ngokugaya nokujika

Izinto ze-CBN kunye ne-PCBN, ezijoliswe njengendlela yokusika isinyithi esimnyama ngobunzima, njengentsimbi eqinile kunye nentsimbi (intsimbi). I-Boron nitrite iyakwazi ukumelana nefuthe lobushushu obuphezulu (ngaphezu kwee-degrees ze-1000) kwaye ibambe ubunzima kwi-8000HV. Le propati yenza ukuba ilingane nokucutshungulwa kwe-carbide blanks, ngakumbi ezo nxalenye zesakhiwo eziqulethwe yi-carbide core kunye ne-casing yensimbi phantsi kokuphazamiseka kokuphazamiseka.

Nangona kunjalo, xa ukuqina kweendawo ze-carbide zesamente kuphezulu kune-HRA90, ngaphandle ngokupheleleyo kwiligi ye-boron nitrite ukusika, akusekho mfuneko yokunyanzelisa kwi-PCBN kunye nezixhobo ze-CBN.

Asinakukwazi ukulahlekelwa ngumbono wokungalungi kokufakwa kwe-PCD, ukungakwazi kwayo ukufumana imiphetho ebukhali kakhulu kunye nokuphazamiseka kokwenziwa ngee-chipbreakers. Ngoko ke, i-PCD ingasetyenziselwa kuphela ukusika kakuhle kweentsimbi ezingenayo i-ferrous kunye ne-non-metals, kodwa ayikwazi ukufikelela kwi-ultra-precision mirror-cutting of carbide blanks, ubuncinane okwangoku.

3. Electrolytic Machining (ECM)

Ukucutshungulwa kwe-Electrolytic kukulungiswa kweengxenye ngomgaqo wokuba i-carbide inokuchithwa kwi-electrolyte (NaOH). Iqinisekisa ukuba umphezulu we-carbide workpiece awufumani bushushu. Kwaye ingongoma kukuba isantya sokucubungula i-ECM kunye nomgangatho wokucubungula zizimeleyo kwiipropati ezibonakalayo zezinto eziza kucutshungulwa.

4. Ukukhutshwa kombane komatshini (EDM)

Umgaqo we-EDM usekwe kwisenzeko sokutya kombane phakathi kwesixhobo kunye nesixhobo sokusebenza (i-electrode elungileyo kunye nengalunganga) ngexesha lokukhutshwa kwe-pulse spark ukususa iinxalenye ze-carbide ezingaphezulu kokufezekisa iimfuno zokusetyenzwa kwangaphambili zobungakanani, imilo kunye nomgangatho womphezulu wesixhobo sokusebenza. . Kuphela i-electrode yobhedu-tungsten kunye ne-electrode ye-copper-silver inokusebenza i-carbide blanks.

Ngamafutshane, i-EDM ayisebenzisi amandla omatshini, ayixhomekeke kwimikhosi yokusika ukususa isinyithi, kodwa isebenzisa ngokuthe ngqo amandla ombane kunye nokushisa ukususa inxalenye ye-carbide.