Pehea e ʻoki ai i ke koʻokoʻo Tungsten Carbide?

ʻIke mākou ʻoi aku ka ʻoi aku o ka paʻakikī o ka mea paahana ponoʻī ma mua o ka paʻakikī o ka ʻāpana hana e mīkini ʻia. ʻO ka paʻakikī o Rockwell o ka carbide cemented ma kahi o HRA78 a hiki i HRA90. Inā makemake ʻoe e kiʻi a ʻoki pono i nā koʻokoʻo tungsten carbide, hiki ke hana ʻia nā ala ʻehā, ʻo ia ka wili huila abrasion, ka mīkini ʻana me ka mea paʻakikī loa, ka mīkini electrolytic (ECM), a me ka mīkini hoʻolele uila (EDM).

1. E ʻoki ʻoki ʻia ke koʻokoʻo carbide me ka wili huila

Mai kēia manawa aku, ʻike nui nā mea hiki ke hana i nā blank carbide i poly-crystalline cubic boron nitride（PCBN）a me poly-crystalline diamond（PCD).

ʻO nā mea nui no ka wili ʻana i nā huila he ʻōmaʻomaʻo silicon carbide a me daimana. ʻOiai ʻo ka wili ʻana i ka silicon carbide e hoʻoulu ai i ke koʻikoʻi wela ma mua o ka palena ikaika o ka carbide cemented, nui nā māwae o ka ʻili, e hana ai i ka silicon carbide ʻaʻole kahi koho kūpono e hana i ka ʻili i hiki ke hōʻoia ʻia.

ʻOiai ua mākaukau ka huila wili PCD e hoʻopau i nā hana a pau mai ka roughing a hiki i ka hoʻopau ʻana i nā carbide blanks, i mea e hōʻemi ai i ka nalowale o ka huila wili, e hana mua ʻia nā blanks carbide e ka mīkini mīkini uila, a laila e hana i ka semi-finishing a me ka maikaʻi- ka hoʻopau ʻana me ka wili huila i ka hope.

2. E ʻoki i ka pahu karbide ma ka wili a me ka huli ʻana

ʻO nā mea hana o CBN a me PCBN, i manaʻo ʻia e ʻoki i nā metala ʻeleʻele me ka paʻakikī, e like me ke kila paʻakikī a me ke kila hoʻolei (hao). Hiki i ka Boron nitrite ke kū i ka mana o ka wela kiʻekiʻe (ma luna o 1000 degere) a paʻa i ka paʻakikī ma 8000HV. Hoʻohālikelike kēia waiwai me ka hana ʻana i nā blanks carbide, ʻoi aku hoʻi no kēlā mau ʻāpana i hoʻokumu ʻia e ka carbide core a me ka pahu kila ma lalo o kahi kūpono keakea.

Eia nō naʻe, ke ʻoi aku ka paʻakikī o nā ʻāpana carbide i hoʻopaʻa ʻia ma mua o HRA90, ma waho o ka liona boron nitrite e ʻoki, ʻaʻole pono e koi hou i nā mea hana PCBN a me CBN. Hiki iā mākou ke huli i nā mea ʻoki daimana PCD ma ke ʻano he pani ma lalo o kēia kūlana.

ʻAʻole hiki iā mākou ke nalowale i ka hemahema o nā mea hoʻokomo PCD, kona hiki ʻole ke loaʻa i nā kihi ʻoi loa a me ka pilikia e hana ʻia me nā chipbreakers. No laila, hiki ke hoʻohana wale ʻia ʻo PCD no ka ʻoki maikaʻi ʻana i nā metala non-ferrous a me nā metala ʻole, akā ʻaʻole hiki ke hoʻokō i ka ʻoki ʻoki ʻana i nā aniani o ka carbide blanks, ma ka liʻiliʻi loa.

3. Electrolytic Machining (ECM)

ʻO ka hana Electrolytic ka hana ʻana o nā ʻāpana e ke kumu e hiki ke hoʻoheheʻe ʻia ka carbide i ka electrolyte (NaOH). ʻAʻole e wela ka ʻili o ka mea hana carbide. Aʻo ka manaʻo,ʻo ka wikiwiki o ka hoʻoponoponoʻana o ka ECM a me ka maikaʻi o ka hoʻoponoponoʻana he kūʻokoʻa ia i nā waiwai kino o ka mea e hanaʻia.

4. Mea hoʻoheheʻe uila (EDM)

Hoʻokumu ʻia ke kumumanaʻo o ka EDM ma ke ʻano ʻino uila ma waena o ka mea hana a me ka mea hana (nā electrodes maikaʻi a maikaʻi ʻole) i ka wā o ka hoʻokuʻu ʻana o ka pulupulu e hoʻoneʻe i nā ʻāpana carbide keu e hoʻokō i nā koi hoʻoponopono i koho mua ʻia no ka nui, ke ʻano a me ka maikaʻi o ka ʻili o ka mea hana. . ʻO nā electrodes keleawe-tungsten wale nō a me nā electrodes keleawe-kālā hiki ke hana i nā blank carbide.

I ka pōkole, ʻaʻole hoʻohana ʻo EDM i ka ikehu mechanical, ʻaʻole ia e hilinaʻi i ka ʻoki ʻana i nā ikaika e wehe i ka metala, akā hoʻohana pololei i ka ikehu uila a me ka wela e wehe i ka ʻāpana carbide.