Zvicheki zvePDC, kana kuti polycrystalline diamond compact, zvave chinhu chinochinja-chinja indasitiri yekuchera. Zvishandiso izvi zvekucheka zvakachinja tekinoroji yekuchera nekuwedzera kushanda zvakanaka uye kuderedza mari. Asi zvicheki zvePDC zvakabva kupi, uye zvakazosvika sei pakuzivikanwa zvakadaro?
Nhoroondo yePDC cutters inotangira kuma1950 apo madhaimani ekugadzira akatanga kugadzirwa. Madhaimani aya aigadzirwa nekuisa graphite pasi pesimba rakakwirira uye tembiricha, zvichigadzira chinhu chakaoma kupfuura dhaimani rechisikigo. Madhaimani ekugadzira akakurumidza kufarirwa mumaindasitiri, kusanganisira kubhoorwa.
Zvisinei, kushandisa madhaimani ekugadzira pakuchera kwaive kwakaoma. Madhaimani acho aiwanzotyoka kana kubva pamudziyo, zvichideredza kushanda kwawo uye zvaida kutsiviwa nguva nenguva. Kuti vagadzirise dambudziko iri, vaongorori vakatanga kuyedza kusanganisa madhaimani ekugadzira nezvimwe zvinhu, zvakaita setungsten carbide, kuti vagadzire chishandiso chekucheka chakasimba uye chinoshanda zvakanaka.
Mumakore ekuma1970, matombo ekutanga ePDC akagadzirwa, aine dhaimani rakasungirirwa kune tungsten carbide substrate. Macheka aya akatanga kushandiswa muindasitiri yemigodhi, asi mabhenefiti awo akakurumidza kuoneka mukushandiswa kwemafuta negasi. Machira ePDC aibatsira kuchera nekukurumidza uye zvinobudirira, achideredza mitengo uye achiwedzera kugadzirwa.
Sezvo tekinoroji yakawedzera, kucheka kwePDC kwakawedzera kufambira mberi, nemagadzirirwo matsva nezvinhu zvichiwedzera kugara kwenguva refu uye kushanduka-shanduka. Nhasi, kucheka kwePDC kunoshandiswa mumhando dzakasiyana-siyana dzekuchera, kusanganisira kuchera pasi pemvura, kuchera migodhi, kuvaka, nezvimwewo.
Kushandiswa kwezvicheki zvePDC kwakatungamirawo pakufambira mberi muhunyanzvi hwekuboora, hwakadai sekuboora kwakatwasuka uye kuboora zvakananga. Maitiro aya akagoneka nekuda kwekuwedzera kushanda zvakanaka uye kugara kwenguva refu kwezvicheki zvePDC, zvichibvumira kuchera kwakanyatsojeka uye kwakadzorwa.
Mukupedzisa, vatengesi vePDC vane nhoroondo yakapfuma inotangira pakugadzirwa kwemadhaimani ekugadzira muma1950. Kushanduka kwavo nekukura kwavo kwakatungamira mukufambira mberi kukuru muhunyanzvi hwekuchera, kuvandudza kushanda zvakanaka, kuderedza mitengo, uye kuwedzera huwandu hwemashandisirwo. Sezvo kudiwa kwekuchera nekukurumidza uye kwakanaka kuri kuramba kuchikura, zviri pachena kuti vatengesi vePDC vacharamba vari chikamu chakakosha cheindasitiri yekuchera.
Nguva yekutumira: Kurume-04-2023
