Ndemanga
Polycrystalline Diamond Compact (PDC), yomwe nthawi zambiri imatchedwa diamondi composite, yasintha makina opanga makina olondola kwambiri chifukwa cha kuuma kwake kwapadera, kukana kuvala, komanso kukhazikika kwamafuta. Pepalali limapereka kusanthula mozama kwa zinthu za PDC, njira zopangira, komanso kugwiritsa ntchito zida zapamwamba pamakina olondola. Kukambitsiranaku kukukhudza ntchito yake yodula kwambiri, kugaya kolondola kwambiri, makina ang'onoang'ono, komanso kupanga zida zamlengalenga. Kuphatikiza apo, zovuta monga kukwera mtengo kwa kupanga ndi kufooka zimayankhidwa, limodzi ndi zomwe zikuchitika m'tsogolo muukadaulo wa PDC.
1. Mawu Oyamba
Makina olondola amafunikira zida zolimba kwambiri, zolimba, komanso kukhazikika kwamafuta kuti zikwaniritse kulondola kwamlingo wa micron. Zida zamakono monga tungsten carbide ndi zitsulo zothamanga kwambiri nthawi zambiri zimakhala zochepa kwambiri, zomwe zimapangitsa kuti pakhale zipangizo zamakono monga Polycrystalline Diamond Compact (PDC). PDC, chida chopangidwa ndi diamondi, chimawonetsa magwiridwe antchito osayerekezeka pakumanga zinthu zolimba komanso zosalimba, kuphatikiza zoumba, zophatikizika, ndi zitsulo zolimba.
Pepalali likuwunika zofunikira za PDC, njira zake zopangira, komanso kusintha kwake pamakina olondola. Kuphatikiza apo, imayang'ana zovuta zomwe zikuchitika komanso kupita patsogolo kwaukadaulo wa PDC.
2. Zinthu Zakuthupi za PDC
PDC imakhala ndi gawo la diamondi ya polycrystalline (PCD) yolumikizidwa ku gawo lapansi la tungsten carbide pansi pamikhalidwe yothamanga kwambiri, kutentha kwambiri (HPHT). Zofunika kwambiri ndi izi:
2.1 Kuuma Kwambiri ndi Kukaniza Kuvala
Daimondi ndiye chinthu chovuta kwambiri chodziwika bwino (kuuma kwa Mohs 10), kupangitsa PDC kukhala yabwino kupanga zida zopumira.
Kukana kuvala kwapamwamba kumatalikitsa moyo wa zida, kumachepetsa nthawi yopumira pamakina olondola.
2.2 High Thermal Conductivity
Kutentha kwachangu kumalepheretsa kutentha kwa kutentha panthawi ya makina othamanga kwambiri.
Amachepetsa kuvala kwa zida ndikuwongolera kumaliza kwapamwamba.
2.3 Kukhazikika kwa Chemical
Kugonjetsedwa ndi zochita za mankhwala ndi zinthu zachitsulo komanso zopanda chitsulo.
Amachepetsa kuwonongeka kwa zida m'malo owononga.
2.4 Kulimba kwa Fracture
Gawo la tungsten carbide limathandizira kukana, kuchepetsa kuphulika ndi kusweka.
3. Njira Yopangira PDC
Kupanga kwa PDC kumaphatikizapo njira zingapo zofunika:
3.1 Kuphatikizika kwa Ufa wa Diamondi
Tinthu tating'ono ta diamondi timapangidwa kudzera pa HPHT kapena chemical vapor deposition (CVD).
3.2 Njira ya Sintering
Ufa wa diamondi umathiridwa pagawo la tungsten carbide pansi pa kupanikizika kwambiri (5-7 GPa) ndi kutentha (1,400-1,600 ° C).
Chothandizira zitsulo (mwachitsanzo, cobalt) chimathandizira kulumikizana kwa diamondi ndi diamondi.
3.3 Pambuyo pokonza
Laser kapena Electric discharge Machining (EDM) amagwiritsidwa ntchito popanga PDC kukhala zida zodulira.
Chithandizo chapamwamba chimawonjezera kumamatira ndikuchepetsa kupsinjika kotsalira.
4. Mapulogalamu mu Precision Machining
4.1 Kudula Kwambiri Zida Zopanda Ferrous
Zida za PDC zimapambana popanga aluminiyamu, mkuwa, ndi kaboni fiber composites.
Ntchito zamagalimoto (piston Machining) ndi zamagetsi (PCB mphero).
4.2 Ultra-Precision Akupera kwa Optical Components
Amagwiritsidwa ntchito popanga ma lens ndi magalasi opanga ma lasers ndi telescopes.
Imakwaniritsa roughness ya sub-micron surface (Ra <0.01 µm).
4.3 Micro-Machining for Medical Devices
Zobowola zazing'ono za PDC ndi mphero zomaliza zimapanga zinthu zovuta kwambiri pazida zopangira opaleshoni ndi ma implants.
4.4 Aerospace Component Machining
Machining titaniyamu aloyi ndi CFRP (carbon fiber-reinforced ma polima) okhala ndi zida zochepa.
4.5 Ma Ceramics Atsogola ndi Makina Olimba Achitsulo
PDC imaposa cubic boron nitride (CBN) popanga silicon carbide ndi tungsten carbide.
5. Zovuta ndi Zolepheretsa
5.1 Ndalama Zopangira Zambiri
HPHT kaphatikizidwe ndi ndalama za diamondi zimachepetsa kutengera anthu ambiri.
5.2 Kusalimba M'kudula Kosokoneza
Zida za PDC zimakonda kudumpha mukakonza malo osapitilira.
5.3 Kuwonongeka kwa Matenthedwe Pakutentha Kwambiri
Kujambula kumachitika pamwamba pa 700 ° C, kuchepetsa kugwiritsa ntchito makina owuma a zinthu zachitsulo.
5.4 Kugwirizana Kwapang'ono Ndi Zitsulo Zachitsulo
Zomwe zimachitika ndi chitsulo ndi chitsulo zimapangitsa kuti ziwonongeke.
6. Zochitika Zamtsogolo ndi Zatsopano
6.1 Nano-Structured PDC
Kuphatikizika kwa mbewu za nano-diamondi kumawonjezera kulimba komanso kukana kuvala.
6.2 Zida Zophatikiza za PDC-CBN
Kuphatikiza PDC ndi kiyubiki boron nitride (CBN) kwa machining zitsulo ferrous.
6.3 Kupanga Zowonjezera kwa Zida za PDC
Kusindikiza kwa 3D kumathandizira ma geometries ovuta kuti azitha kukonza makina.
6.4 Zovala Zapamwamba
Zovala ngati kaboni wa diamondi (DLC) zimapititsa patsogolo moyo wa zida.
7. Mapeto
PDC yakhala yofunika kwambiri pakupanga makina olondola, ndikupereka magwiridwe antchito osayerekezeka pakudula kothamanga kwambiri, kupera kolondola kwambiri, ndi makina ang'onoang'ono. Ngakhale kuti pali zovuta monga kukwera mtengo komanso kufooka, kupita patsogolo kwa sayansi ndi njira zopangira zinthu kumalonjeza kuwonjezera ntchito zake. Zamtsogolo zamtsogolo, kuphatikiza PDC yopangidwa ndi nano ndi zida zosakanizidwa, zilimbitsa gawo lake muukadaulo wam'badwo wotsatira.
Nthawi yotumiza: Jul-07-2025
