Kakaretso
Polycrystalline Diamond Compact (PDC), eo hangata e bitsoang motsoako oa daemane, e fetotse indasteri ea machining e nepahetseng ka lebaka la ho thatafala ha eona ho ikhethang, ho se mamelle, le botsitso ba mocheso. Pampiri ena e fana ka tlhahlobo e tebileng ea thepa ea PDC, lits'ebetso tsa tlhahiso, le lits'ebetso tse tsoetseng pele tsa machining a nepahetseng. Puisano e akaretsa karolo ea eona ea ho seha ka lebelo le phahameng, ho sila ka mokhoa o nepahetseng ka ho fetesisa, ho etsa micro-machining, le ho etsa likarolo tsa sebaka sa sefofane. Ho feta moo, liphephetso tse kang litšenyehelo tse phahameng tsa tlhahiso le bofokoli lia rarolloa, hammoho le mekhoa ea nako e tlang ea theknoloji ea PDC.
1. Selelekela
Ho sebetsa ka mokhoa o nepahetseng ho hloka lisebelisoa tse nang le boima bo phahameng, ho tšoarella, le botsitso ba mocheso ho fihlela ho nepahala ha boemo ba micron. Lisebelisoa tsa lisebelisoa tsa setso tse kang tungsten carbide le tšepe e lebelo le phahameng hangata li oela maemong a feteletseng, e leng se lebisang ho amoheleheng ha lisebelisoa tse tsoetseng pele tse kang Polycrystalline Diamond Compact (PDC). PDC, thepa ea maiketsetso e thehiloeng ho taemane, e bonts'a ts'ebetso e ke keng ea lekanngoa ha ho etsoa thepa e thata le e brittle, ho kenyeletsoa lirafshoa, li-composites le litšepe tse thata.
Pampiri ena e hlahloba thepa ea mantlha ea PDC, mekhoa ea eona ea tlhahiso, le phello ea eona ea phetoho ho machining a nepahetseng. Ho feta moo, e hlahloba mathata a hajoale le tsoelo-pele ea nako e tlang ho theknoloji ea PDC.
2. Lintho tse bonahalang tsa PDC
PDC e na le lera la daemane ea polycrystalline (PCD) e kopantsoeng le substrate ea tungsten carbide tlas'a maemo a phahameng a khatello, mocheso o phahameng (HPHT). Lintho tsa bohlokoa li kenyelletsa:
2.1 Ho Thata ho Feteletseng le Ho se Mamelle ho Thibela
Diamond ke ntho e thata ka ho fetisisa e tsejoang (Mohs hardness of 10), e etsang hore PDC e be e loketseng bakeng sa machining abrasive materials.
Khanyetso e phahameng ea ho apara e eketsa bophelo ba sesebelisoa, e fokotsa nako ea ho sebetsa ka mokhoa o nepahetseng.
2.2 High Thermal Conductivity
Ho senya mocheso o sebetsang hantle ho thibela ho senyeha ha mocheso nakong ea ho sebetsa ka lebelo le phahameng.
E fokotsa ho roala ha lisebelisoa le ho ntlafatsa boleng bo holimo.
2.3 Botsitso ba Lik'hemik'hale
E hanana le ts'ebetso ea lik'hemik'hale ka lisebelisoa tse nang le ferrous le non-ferrous.
E fokotsa ho senyeha ha lisebelisoa libakeng tse senyang.
2.4 Ho Thata ha Ho robeha
Tungsten carbide substrate e ntlafatsa ts'ebetso ea ho hanyetsa, e fokotsa ho phunyeha le ho senya.
3. Ts'ebetso ea Tlhahiso ea PDC
Tlhahiso ea PDC e kenyelletsa mehato e 'maloa ea bohlokoa:
3.1 Tšimoloho ea Phofo ea Taemane
Likaroloana tsa daemane tsa maiketsetso li hlahisoa ka HPHT kapa k'hemik'hale ea mouoane oa lik'hemik'hale (CVD).
3.2 Sintering Process
Phofo ea daemane e tšeloa holim'a tungsten carbide substrate tlas'a khatello e matla (5-7 GPa) le mocheso (1,400-1,600 ° C).
Sesebelisoa sa tšepe (mohlala, cobalt) se thusa ho kopanya daemane le daemane.
3.3 Ka mor'a Ts'ebetso
Laser kapa electro discharge machining (EDM) e sebelisetsoa ho bopa PDC ka lisebelisoa tsa ho itšeha.
Liphekolo tsa holim'a metsi li ntlafatsa ho khomarela le ho fokotsa khatello ea kelello e setseng.
4. Likopo ho Precision Machining
4.1 Ho Seha ka Lebelo le Leholo la Lisebelisuoa Tse se Nang Ferrous
Lisebelisoa tsa PDC li ipabola ka ho etsa metjhini ea aluminium, koporo le likhoele tsa khabone.
Likopo ho likoloi (machining ea piston) le lisebelisoa tsa elektroniki (PCB milling).
4.2 Ultra-Precision Sila ea Lisebelisoa tsa Optical
E sebelisoa ha ho etsoa lense le seipone bakeng sa lisebelisoa tsa laser le libonela-hōle.
E fihlella bokhopo ba bokaholimo ba micron (Ra <0.01 µm).
4.3 Micro-Machining bakeng sa Lisebelisoa tsa Bongaka
Li-drill tsa PDC le li-mill tsa ho qetela li hlahisa likarolo tse rarahaneng ho lisebelisoa tsa ho buoa le li-implants.
4.4 Mochine oa Karolo ea Sefofane
Ho etsa li-alloys tsa titanium le CFRP (li-polymers tse matlafalitsoeng ka carbon) tse nang le lisebelisoa tse fokolang.
4.5 Li-Ceramics tse Tsoetseng Pele le Mechini ea Tšepe e Thatatsoeng
PDC e feta li-cubic boron nitride (CBN) ha ho etsoa machining silicon carbide le tungsten carbide.
5. Mathata le Mefokolo
5.1 Litšenyehelo tse Phahameng tsa Tlhahiso
HPHT synthesis le litšenyehelo tsa thepa ea daemane li fokotsa ho amoheloa ha bana.
5.2 Bofokoli ba ho Seha ho Khatisoang
Lisebelisoa tsa PDC li tloaetse ho qhekella ha ho etsoa machining libaka tse sa tsitsang.
5.3 Ho Fokotseha ha Mocheso ka Mocheso o Holimo
Graphitization e etsahala ka holimo ho 700 ° C, e fokotsa tšebeliso ea mochine o omileng oa thepa ea tšepe.
5.4 Tšebelisano e Lekanyelitsoeng le Litšepe Tse Ferrous
Lits'ebetso tsa lik'hemik'hale tse nang le tšepe li lebisa ho senyeha ho potlakileng.
6. Mekhoa ea Bokamoso le Litlhahiso
6.1 PDC e hlophisitsoeng ka Nano
Ho kenyelletsoa ha lijo-thollo tsa nano-diamond ho matlafatsa ho tiea le ho hanyetsa ho apara.
6.2 Lisebelisoa tsa Hybrid PDC-CBN
Ho kopanya PDC le cubic boron nitride (CBN) bakeng sa machining a tšepe ea tšepe.
6.3 Tlhahiso e Ekelitsoeng ea Lisebelisoa tsa PDC
Khatiso ea 3D e thusa li-geometri tse rarahaneng bakeng sa litharollo tsa machining tse ikhethileng.
6.4 Liaparo tse tsoetseng pele
Liaparo tsa carbon-like carbon (DLC) li ntlafatsa nako ea bophelo ea lisebelisoa.
7. Qetello
PDC e fetohile ea bohlokoa haholo ho machining e nepahetseng, e fana ka ts'ebetso e ke keng ea lekanngoa ka ho itšeha ka lebelo le phahameng, ho sila ka mokhoa o nepahetseng haholo, le ho etsa micro-machining. Leha ho na le liphephetso tse kang litšenyehelo tse phahameng le brittleness, tsoelo-pele e tsoelang pele ea saense ea lintho tse bonahalang le mekhoa ea tlhahiso e tšepisa ho atolosa lisebelisoa tsa eona ho ea pele. Lintlafatso tsa nako e tlang, ho kenyeletsoa PDC e hlophisitsoeng ka nano le meralo ea lisebelisoa tse nyalisitsoeng, e tla tiisa karolo ea eona ho mahlale a morao-rao a machining.
Nako ea poso: Jul-07-2025
