Kodi tsamba la PCD ndi chiyani?

Kodi tsamba la macheka la PCD ndi chiyani?

Powona kuti anthu ambiri sadziwa zambiri za kutanthauzira kwa tsamba la PCD la saw, ngakhale kuphatikizapo akatswiri okhudzana ndi tsamba la PCD, tanthawuzo loperekedwa ndi ena mwa iwo silolondola mokwanira!

Dzina lonse lachi China la PCD saw tsamba ndi chidule cha "polycrystalline diamond saw blade", momwe PCD ndi chidule cha PolyCrystalline Diamondi (yotanthauziridwa m'Chitchaina ngati diamondi ya polycrystalline), kotero tsamba la PCD limatchedwanso diamondi.Tsamba la macheka, koma chifukwa tsamba la diamondi lodulira mwala lidawonekera kale kwambiri kuposa tsamba la PCD, Huangrui Tool amakhulupirira kuti ndizosavuta kuyambitsa chisokonezo kungotcha tsamba la PCD ngati tsamba la diamondi.Sizosamvetsetseka kwambiri kuyitcha PCD diamondi saw tsamba.
Monga tonse tikudziwira, diamondi ndi chinthu chovuta kwambiri chomwe chilipo m'chilengedwe.Ndi kristalo wokhazikika wa octahedral wopangidwa ndi zinthu za kaboni zomwe zimapangidwa kuzama kwa dziko lapansi chifukwa cha kuthamanga kwambiri komanso kutentha kwambiri.Zamphamvu, ma electron onse a valence akuphatikizidwa pakupanga ma covalent bond, palibe ma elekitironi aulere alipo, kotero kuuma kwa diamondi ndi kwakukulu kwambiri, kuuma kwa diamondi ndi 4 nthawi ya corundum ndi 8 nthawi ya quartz!

Ukadaulo wamakono watha kupanga makristalo opangidwa ndi diamondi imodzi, ndipo PCD imagwiritsa ntchito cobalt ndi zitsulo zina ngati zomangira kuti apange ufa wopangidwa ndi diamondi imodzi kukhala ma polycrystals a diamondi pamikhalidwe yapadera.Kuuma kwa diamondi iyi ya polycrystalline (ie PCD) ndi Ngakhale kuti siili yolimba ngati diamondi imodzi ya kristalo, kuuma kwake kudakali kokwera kwambiri monga 8000HV, yomwe ndi 80 ~ 120 nthawi ya carbide yopangidwa ndi simenti!Komanso, matenthedwe amtundu wa PCD ndi 700W/MK, omwe ndi 2 ~ 9 nthawi ya carbide yomangidwa, komanso apamwamba kuposa PCBN ndi mkuwa.Choncho, ntchito PCB zinthu monga macheka tsamba mutu, kutentha kutengerapo liwiro ndi kudya kwambiri pa kudula.Kuonjezera apo, coefficient of thermal expansion of PCD material ndi gawo limodzi mwa magawo asanu a carbide cemented, ndipo coefficient of friction ndi gawo limodzi mwa magawo atatu a carbide cemented.Izi zimatsimikizira kuti tsamba la macheka pogwiritsa ntchito zinthu za PCD monga mutu wodula ndi wofanana ndi thupi la macheka.Pazifukwa zina, osati moyo wautumiki wa tsamba la macheka moyerekeza ndi nthawi zosachepera 30 kuposa tsamba la macheka a carbide, komanso mawonekedwe odulira ndi abwinoko.Komanso, kuyanjana pakati pa zida za PCD ndi zitsulo zopanda chitsulo ndi zinthu zopanda chitsulo ndizochepa.Podula zitsulo zopanda chitsulo kapena zinthu zopanda zitsulo, mutu wodula wa PCD pa tsamba la macheka nawonso sangagwirizane ndi utuchi kusiyana ndi mutu wodula carbide.Pomaliza, palinso mwayi wina: Zinthu za PCD zimakhala ndi asidi amphamvu komanso kukhazikika kwa alkali, zomwe zimapindulitsa kwambiri kukhazikika kwa masamba a PCD.

PCD anaona tsamba ndi ntchito simenti carbide monga masanjidwewo kwa zinthu PCD zoposa 1mm, kupanga osakaniza kudzera sintering kapena njira zina kukanikiza, ndipo potsiriza inlay pa aloyi zitsulo mbale thupi la macheka tsamba, kuti m'malo. zinthu zolimba ndi PCD wodula mutu.Ndilo kudula kwa tsamba la macheka, lomwe limathandizira kwambiri moyo wautumiki wa tsamba la macheka ndi kukhazikika kwa khalidwe locheka.

Pakali pano, ochulukirachulukira ogwiritsa tsamba tsamba amasankha kugwiritsa ntchito PCD diamondi macheka masamba ndi kopitilira muyeso-utali moyo utumiki, amene zimagwiritsa ntchito mafakitale opanga mipando, sanali ferrous zitsulo processing makampani kuti n'zovuta kudula, ndi zotayidwa aloyi chitseko ndi zenera. opanga kuti asinthe mipeni yoyambirira ya carbide.Tsamba la aloyi lamutu silingathe kudula mosalekeza kwa nthawi yayitali, komanso siliyenera kusintha tsamba la macheka pafupipafupi.Kukhala ndi moyo wautali, momveka bwino, kumachepetsa mtengo wodula kwambiri poyerekeza ndi kugwiritsa ntchito macheka a carbide!