PDC bit Cutter ke eng?

Taemane ke ntho e thata ka ho fetisisa e tsejoang. Ho thatafala hona ho e fa thepa e phahameng ea ho seha lisebelisoa tse ling. PDC(Polycrystalline diamond compact) e bohlokoa haholo ho cheka hobane e kopanya litaemane tse nyane, tse theko e tlase, tse entsoeng ke batho hore e be matšoele a maholo, a kopaneng a likristale tse sa fetoheng tse ka bopjoang ho ba libopeho tse sebetsang tse bitsoang litafole tsa daemane. Litafole tsa daemane ke karolo ea seha se kopanyang sebopeho. Ntle le ho thatafala ha tsona, litafole tsa daemane tsa PDC li na le tšobotsi ea bohlokoa bakeng sa li-drill-bit cutters: Li tlamahanngoa hantle le thepa ea tungsten carbide e ka kenngoeng ka braze (e khomaretsoeng) ho loma 'mele. Litaemane, ka botsona, li ke ke tsa tlamahanngoa, leha e le hore li ka hokelloa ka ho betsoa.

Taemane ea maiketsetso

Hangata grit ea daemane e sebelisoa ho hlalosa lithollo tse nyane (≈0.00004 in.) tsa daemane ea maiketsetso e sebelisoang e le sesebelisoa sa mantlha sa li-cutters tsa PDC. Mabapi le lik'hemik'hale le thepa, taemane e entsoeng ke motho e tšoana le taemane ea tlhaho. Ho etsa grit ea taemane ho kenyelletsa ts'ebetso e bonolo ea lik'hemik'hale: k'habone e tloaelehileng e futhumatsoa tlas'a khatello e phahameng haholo le mocheso. Leha ho le joalo, ha e le hantle, ho etsa taemane ha ho bonolo.

Likristale tsa daemane ka bomong tse ka har'a grit ea daemane li na le mekhoa e fapaneng. Sena se etsa hore thepa e be matla, e be bohale, 'me, ka lebaka la ho thatafala ha daemane e ka har'a eona, e se ke ea senyeha haholo. Ha e le hantle, sebopeho se sa reroang se fumanoang litaemane tsa maiketsetso tse kopantsoeng se sebetsa hantle ho kuta ho feta litaemane tsa tlhaho, hobane litaemane tsa tlhaho ke likristale tsa cubic tse robehang habonolo ho latela meeli ea tsona e hlophisitsoeng, ea kristale.

Leha ho le joalo, grit ea daemane ha e tsitsitse mochesong o phahameng ho feta litaemane tsa tlhaho. Hobane metallic catalyst e qabeletsoe ka har'a sebopeho sa grit e na le sekhahla se phahameng sa katoloso ea mocheso ho feta daemane, katoloso e fapaneng e beha libonto tsa daemane ho isa ho taemane tlas'a sekuti, 'me haeba meroalo e phahame ka ho lekana, e baka ho hloleha. Haeba litlamo li hlōleha, litaemane li lahleheloa ka potlako, kahoo PDC e lahleheloa ke boima ba eona le bohale ba eona 'me e fetoha e sa sebetseng. Ho thibela ho hloleha ho joalo, li-cutters tsa PDC li tlameha ho pholile ka ho lekaneng nakong ea ho cheka.

Litafole tsa taemane

Ho etsa tafole ea daemane, grit ea daemane e tšeloa ka tungsten carbide le metallic binder ho etsa lera le nang le taemane e ngata. Li na le sebopeho se kang sephaphatha, 'me li lokela ho etsoa tse teteaneng ka moo ho ka khonehang hobane molumo oa daemane o eketsa bophelo ba ho apara. Litafole tsa litaemane tsa boleng bo holimo li ≈2 ho isa ho 4 mm, 'me tsoelo-pele ea theknoloji e tla eketsa botenya ba litaemane tsa tafole. Li-substrates tsa Tungsten carbide hangata li phahame ka ≈0.5 in. 'me li na le sebopeho le litekanyo tse tšoanang le tsa tafole ea daemane. Likarolo tse peli, tafole ea daemane, le substrate, li etsa sehahi

Kaho ea sehahi sa PDC.

Ho theha PDC hore e be libopeho tse molemo bakeng sa li-cutters ho kenyelletsa ho beha grit ea daemane, hammoho le substrate ea eona, ka har'a sejana sa khatello ebe se chesa mocheso o phahameng le khatello.

Liseha tsa PDC li ke ke tsa lumelloa ho feta mocheso oa 1,382°F [750°C]. Mocheso o feteletseng o etsa hore ho be le ho apara ka potlako hobane katoloso e fapaneng ea mocheso pakeng tsa binder le daemane e na le ho senya likristale tsa grit tsa daemane tse ka har'a tafole ea daemane. Matla a tlamahano lipakeng tsa tafole ea daemane le substrate ea tungsten carbide a boetse a beoa kotsing ke katoloso e fapaneng ea mocheso.

Haeba u thahasella lihlahisoa tsa tungsten carbide 'me u batla boitsebiso bo eketsehileng le lintlha tse ling, u ka RE THUTA ka mohala kapa ka poso ka letsohong le letšehali, kapa U RE THUSE MAIL botlaaseng ba leqephe.