Mokhoa oa ho khaola Tungsten carbide rod?

Rea tseba hore boima ba thepa ea sesebelisoa ka boeona bo tlameha ho ba bo phahameng ho feta boima ba mosebetsi o lokelang ho etsoa. Rockwell hardness ea carbide e entsoeng ka samente hangata e pota-pota HRA78 ho ea ho HRA90. Haeba u batla ho fumana lintlha kapa ho khaola li-rod tsa tungsten carbide ka nepo, litsela tse 4 tse latelang li ka sebetsa, e leng abrasion wheel grinding, machining by super hard material, electrolytic machining(ECM), le electric discharge machining(EDM).

1. Seha molamu oa carbide o se na letho ka ho sila ka mabili

Ho tloha joale ho ea pele, lisebelisoa tse ka sebetsanang le likheo tsa carbide haholo-holo li bua ka poly-crystalline cubic boron nitride (PCBN) le poly-crystalline diamond (PCD).

Lisebelisoa tse ka sehloohong tsa mabili a sila ke silicon carbide e tala le daemane. Kaha ho sila ha silicon carbide ho tla hlahisa khatello ea mocheso e fetang moeli oa matla a carbide e entsoeng ka samente, mapheo a holim'a metsi a etsahala haholo, e leng se etsang hore silicon carbide e se khetho e nepahetseng ea ho etsa bokaholimo bo ka tiisetsoang.

Le hoja lebili la ho sila la PCD le tšoaneleha ho phetha mesebetsi eohle ho tloha ho roughing ho ea ho qetela holim'a likheo tsa carbide, e le ho fokotsa tahlehelo ea lebili la ho sila, likheo tsa carbide li tla sebetsoa pele ka mokhoa oa mochine oa motlakase, ebe o etsa semi-finishing le hantle- ho qeta ka lebidi la ho sila qetellong.

2. Seha carbide bar ka ho sila le ho e phethola

Lisebelisoa tsa CBN le PCBN, tse reretsoeng e le mokhoa oa ho khaola litšepe tse ntšo ka thata, tse kang tšepe e thata le tšepe e entsoeng ka tšepe (tšepe). Boron nitrite e khona ho mamella tšusumetso ea mocheso o phahameng (ka holimo ho likhato tse 1000) le ho tšoara boima ka 8000HV. Thepa ena e etsa hore e lekane le ho sebetsana le likheo tsa carbide, haholo-holo bakeng sa likarolo tseo tsa meralo tse kenyelletsoeng ke carbide core le casing ea tšepe tlas'a ho kena-kenana le tšitiso.

Leha ho le joalo, ha boima ba likarolo tsa carbide tse entsoeng ka samente bo phahame ho feta HRA90, ntle le selekane sa boron nitrite ho khaola, ha ho sa hlokahala hore re tsitlallele ho lisebelisoa tsa PCBN le CBN.

Re ntse re ke ke ra lahleheloa ke monyetla oa ho kenya PCD, ho se khone ho fumana likarolo tse bohale ka ho fetisisa le tšitiso ea ho etsoa ka li-chipbreaker. Ka hona, PCD e ka sebelisoa feela bakeng sa ho itšeha hantle ha litšepe tse se nang ferrous le tse se nang tšepe, empa ha e khone ho fihlela sekoaelo sa seipone se hlakileng sa likheo tsa carbide, bonyane hajoale.

3. Mochini oa Electrolytic (ECM)

Electrolytic processing ke ho sebetsa ha likarolo ka molao-motheo oa hore carbide e ka qhibiliha ka electrolyte (NaOH). E etsa bonnete ba hore bokaholimo ba "carbide workpiece" ha bo futhumale. 'Me ntlha ke hore lebelo la ts'ebetso ea ECM le boleng ba ts'ebetso li itšetlehile ka thepa ea' mele ea thepa e lokelang ho sebetsoa.

4. Motlakase oa ho ntša metsi (EDM)

Molao-motheo oa EDM o ipapisitse le ts'ebetso ea kutu ea motlakase lipakeng tsa sesebelisoa le sesebelisoa (li-electrode tse ntle le tse mpe) nakong ea phallo ea pulse spark ho tlosa likarolo tse ngata tsa carbide ho fihlela litlhoko tse reriloeng esale pele bakeng sa boholo, sebopeho le boleng ba bokaholimo ba sesebelisoa. . Ke li-electrode tsa koporo-tungsten feela le li-electrode tsa koporo-silevera tse ka sebetsanang le likheo tsa carbide.

Ka bokhutšoanyane, EDM ha e sebelise matla a mechine, ha e itšetlehe ka matla a ho itšeha ho tlosa tšepe, empa ka ho toba e sebelisa matla a motlakase le mocheso ho tlosa karolo ea carbide.