Iyini i-PDC bit Cutter?

Idayimane liyinto enzima kakhulu eyaziwayo. Lobu bunzima buyinikeza izici eziphakeme zokusika noma iyiphi enye impahla. I-PDC(i-Polycrystalline diamond compact) ibaluleke kakhulu ekubhobolweni ngoba ihlanganisa amadayimane amancane, angabizi, enziwe umuntu abe izixuku ezinkulu, ezixubene zamakristalu agxile ngokungahleliwe angakhiwa abe yizimo eziwusizo ezibizwa ngamatafula edayimane. Amathebula edayimane ayingxenye yesisiki esithinta ukwakheka. Ngaphandle kokuqina kwawo, amatafula edayimane e-PDC anesici esibalulekile sabasiki be-drill-bit: Ahlangana kahle nezinto ze-tungsten carbide ezingananyathiselwa (zinamathiselwe) emizimbeni encane. Amadayimane, ngokwawo, ngeke ahlangane, futhi awanakuxhunywa ngokugqanyiswa.

Idayimane lokwenziwa

Igridi yedayimane ivamise ukusetshenziselwa ukuchaza izinhlamvu ezincane (≈0.00004 in.) zedayimane lokwenziwa elisetshenziswa njengento eluhlaza engukhiye yabasiki be-PDC. Ngokwamakhemikhali nezakhiwo, idayimane elenziwe ngabantu lifana nedayimane lemvelo. Ukwenza igrit yedayimane kuhilela inqubo elula ngamakhemikhali: ikhabhoni evamile ifudunyezwa ngaphansi kwengcindezi ephakeme kakhulu kanye nezinga lokushisa. Nokho, ekusebenzeni, ukwenza idayimane akulula neze.

Amakristalu edayimane angawodwana aqukethwe kugridi yedayimane anomumo ohlukile. Lokhu kwenza into iqine, ibukhali, futhi, ngenxa yokuqina kwedayimane eliqukethwe, imelane ngokwedlulele. Eqinisweni, isakhiwo esingahleliwe esitholakala kumadayimane okwenziwa ahlanganisiwe senza kangcono ekusheleni kunedayimane lemvelo, ngoba amadayimane emvelo angamakristalu ayi-cubic aphuka kalula emingceleni yawo ehlelekile, eyikristalu.

Igridi yedayimane ayizinzile kangako emazingeni okushisa aphezulu kunamadayimane emvelo, nokho. Ngenxa yokuthi i-metallic catalyst evaleleke esakhiweni segrit inenani eliphezulu lokunwetshwa okushisayo kunedayimane, ukunwetshwa okuhlukile kubeka amabhondi edayimane ukuya-kwedayimane ngaphansi kwe-shear futhi, uma imithwalo iphezulu ngokwanele, ibangela ukwehluleka. Uma amabhondi ehluleka, amadayimane alahleka ngokushesha, ngakho-ke i-PDC ilahlekelwa ubulukhuni nobukhali bayo futhi ingasebenzi. Ukuze uvimbele ukwehluleka okunjalo, abasiki be-PDC kufanele zipholiswe ngokwanele ngesikhathi sokumba.

Amatafula edayimane

Ukuze kwenziwe ithebula ledayimane, insalela yedayimane igaxwa nge-tungsten carbide kanye ne-metallic binder ukuze kwakhe ungqimba olunothe ngedayimane. Zinomumo onjenge-wafer, futhi kufanele zenziwe ziqine ngendlela engenzeka ngayo ngoba umthamo wedayimane uyandisa impilo yokuguga. Amatafula edayimane ekhwalithi ephezulu ≈2 kuya ku-4 mm, futhi intuthuko yezobuchwepheshe izokwandisa ukujiya kwetafula ledayimane. Ama-substrates e-Tungsten carbide avamise ukuba ngu-≈0.5 in. ukuphakama futhi anomumo ofanayo we-cross-sectional kanye nobukhulu njengetafula ledayimane. Izingxenye ezimbili, itafula ledayimane, ne-substrate, zakha umsiki

Ukwakhiwa komsiki we-PDC.

Ukwakha i-PDC ibe yizimo eziwusizo zabasiki kuhilela ukubeka igrit yedayimane, kanye ne-substrate yayo, emkhunjini wengcindezi bese ucwilisa ukushisa okuphezulu nokucindezela.

Abasiki be-PDC abanakuvunyelwa ukuba beqe izinga lokushisa elingu-1,382°F [750°C]. Ukushisa okudlulele kukhiqiza ukuguga okusheshayo ngoba ukunwetshwa kokushisa okuhlukile phakathi kwe-binder nedayimane kuvame ukuphula amakristalu egrit yedayimane akhule akhulele kuthebula ledayimane. Amandla ebhondi phakathi kwetafula ledayimane ne-tungsten carbide substrate nawo abekwa engcupheni ukunwetshwa kokushisa okuhlukile.

Uma unentshisekelo emikhiqizweni ye-tungsten carbide futhi ufuna ulwazi olwengeziwe nemininingwane, UNGATHI XHUMANA NATHI ngocingo noma ngemeyili kwesokunxele, noma SITHUMELE IMEYILI ezansi nekhasi.