Plastiki e nepahetseng e phahameng fasteners ke likarolo tsa bohlokoa lits'ebetsong tsa tlhokomelo ea liteishene tsa sepakapaka, joalo ka International Space Station (ISS) le sethala se hlahang joalo ka Lunar Gateway. Tsena fasteners, e atisang ho sebelisoa ka mekhoa ea ho laola linomoro tsa k'homphieutha (CNC), e tlameha ho mamella maemo a feteletseng a tikoloho, ho kenyelletsa le vacuum, baesekele ea mocheso, mahlaseli a kotsi le microgravity, ha e ntse e boloka botsitso ba mochine. Boithuto ba boits'oaro ba bona ba boits'oaro - bo kenyelletsang matla, ho hana ho thella, bophelo ba mokhathala le botsitso ba sebopeho - ke ea bohlokoa ho netefatsa ts'epo ea ts'ebetso ea sebaka. Sengoliloeng sena se hlahloba CNC ts'ebetso ea machininges bakeng sa ho hlahisa tsena fasteners, khetho ea lipolasetiki tsa boenjiniere, le lipatlisiso tsa saense tsa boitšoaro ba tsona ba mechine tlas'a maemo a sebele a sebaka. E kopanya litlhahlobo tsa papiso ka litafole tse qaqileng ho hlakisa thepa ea thepa, methati ea machining le metrics ea ts'ebetso.

Bohlokoa ba Li-Fasteners tsa Plastiki ho Tlhokomelo ea Seteishene sa Space

Sistimi ea tlhokomelo ea liteishene tsa sepakapakeng e itšetleha ka li-fasteners ho boloka likarolo tsa modular, joalo ka lisebelisoa tsa ts'ehetso ea bophelo, liteko tsa mahlale, le liphanele tsa meralo, tse hlokang ho bokelloa khafetsa le ho qhaqhoa. Li-fasteners tsa tšepe, ha li ntse li le matla, li baka mathata sebakeng ka lebaka la boima ba tsona, ho ba le ts'oaetso ea galvanic corrosion, le conductivity ea mocheso, e ka eketsang tahlehelo ea mocheso kapa phaello. Li-fasteners tsa polasetiki, ka lehlakoreng le leng, li fana ka melemo e kenyelletsang boima ba 'mele bo tlase, ho hanyetsa kutu, ho kenya motlakase, le thepa e hlophisitsoeng ea mochini. Lisebelisoa tse kang polyetheretherketone (PEEK), polytetrafluoroethylene (PTFE), le polyimide (PI) li ratoa bakeng sa likarohano tsa tsona tse phahameng tsa boima ba 'mele le botsitso libakeng tse thata.

Mosebetsi o ka sehloohong oa li-fasteners tsena lits'ebetsong tsa tlhokomelo ke ho fana ka likhokahano tse sireletsehileng, tse pheta-phetoang ntle le ho senya botšepehi ba likarolo tse kopantsoeng. Mohlala, li-fasteners tse sebelisoang lits'ebetsong tsa extravehicular (EVA) li tlameha ho hana ho tsoa le ho boloka botsitso ba torque tlasa maemo a vacuum. Ho nepahala ho hlokahalang lits'ebetsong tsena ho hloka mekhoa e tsoetseng pele ea tlhahiso, ka CNC lisebelisoa ho ba mokhoa o ratoang ka lebaka la bokhoni ba eona ba ho fihlela mamello e thata le li-geometri tse rarahaneng.

Mekhoa ea ho sebetsa ea CNC bakeng sa li-Fasteners tsa Plastiki

Kakaretso ea CNC Machining

CNC machining e kenyelletsa ts'ebeliso ea lisebelisoa tse laoloang ke komporo ho tlosa thepa ho tsoa mosebetsing, ho e etsa sebopeho se lakatsehang. Bakeng sa li-fasteners tsa polasetiki, CNC ho sila, ho reteleha, le ho cheka hangata ho sebelisoa ho hlahisa likurufu, liboutu, linate le tse khethehileng. li-connectors. Ts'ebetso e qala ka mofuta oa dijithale, oo hangata o bōpiloeng ho sebelisoa software ea computer-aid design (CAD), e fetoletsoeng e le litaelo tsa mochine ka software ea computer-aid production (CAM). Lintlha tsa bohlokoa ho machining a CNC a polasetiki a kenyelletsa khetho ea lisebelisoa, mekhahlelo ea ho itšeha, le ho lokisa lisebelisoa tsa mosebetsi ho thibela deformation.

Khetho ea thepa bakeng sa Machining ea CNC

Khetho ea thepa ea polasetiki e ama haholo liphetho tsa mochini le ts'ebetso e potlakileng. Lisebelisoa tse tloaelehileng li kenyelletsa:

• TS'ELISO: E tsebahala ka matla a eona a phahameng a matla (90-100 MPa), botsitso ba mocheso (ho fihlela ho 250 ° C), le ho hanyetsa mahlaseli, PEEK e loketse li-fasteners tsa meralo.

• PTFE: Ka khohlano e tlase le khanyetso e ntle ea lik'hemik'hale, PTFE e loketse li-fasteners tse hlokang torque e nyane le ho hanyetsa maro a mabifi, leha matla a eona a tlase (20-30 MPa) a fokotsa mojaro-ho jara dikopo.

• PI: E fana ka botsitso bo phahameng ba mocheso (ho fihlela ho 300 ° C) le khanyetso ea creep, PI e sebelisoa libakeng tse phahameng tsa mocheso empa e phephetsa mochine ka lebaka la boima ba eona.

• Polycarbonate (PC): E nkoa e le ea bohlokoa bakeng sa ho pepeseha le ho hanyetsa tšusumetso, PC e sebelisoa ho li-fasteners tse se nang sebopeho empa e atisa ho ba le khatello ea kelello tlas'a meroalo e tsitsitseng.

• Nylon (PA): Ka ho tiea ho hotle le ho hanyetsa ho apara, nylon e na le chelete e ngata empa e monya mongobo, e ama botsitso ba dimensional vacuum.

Tafole e ka tlase e bapisa thepa ea bohlokoa ea lisebelisoa tsena tse amanang le machining a CNC le lisebelisoa tsa sebaka.

Letlapa la 1: Papiso ea Lisebelisoa tsa Plastiki bakeng sa Li-Fasteners tse entsoeng ka CNC ka Likopo tsa Space. TML = Kakaretso ea Tahlehelo ea Boima ho ASTM E595.

Mechini ea Parameters

CNC machining ea polasetiki e hloka liparamente tse ntlafalitsoeng ho fokotsa tšenyo ea mocheso, sebopeho sa burr, le ho se nepahale ha maemo. Mekhahlelo ea bohlokoa e kenyelletsa lebelo la spindle, sekhahla sa phepelo, botebo ba ho seha, le ts'ebeliso ea pholiso. Lipolasetiki tse nang le mocheso o phahameng oa mocheso, joaloka PEEK, li mamella lebelo le phahameng la ho itšeha, ha lisebelisoa tse bonolo joaloka PTFE li hloka lebelo le tlaase ho thibela ho qhibiliha. Tafole e ka tlase e akaretsa maemo a tloaelehileng a machining bakeng sa li-plastiki tse khethiloeng.

Letlapa la 2: Li-Parameters tsa Machining tsa CNC tse khothalelitsoeng bakeng sa li-Fasteners tsa Plastiki.

Mathata ho CNC Machining Plastics

Ho fapana le litšepe, lipolasetiki li bonts'a boits'oaro ba viscoelastic, bo lebisang mathateng a kang:

• Phetoho ea Mocheso: Mocheso o hlahisoang nakong ea machining o ka baka ho qhibiliha kapa ho loana, haholo-holo ka lipolasetiki tse tlaase-tlaase tse kang PTFE.

• Tool Wear: Lipolasetiki tse thata joalo ka PI li potlakisa ho roala ha lisebelisoa, tse hlokang lisebelisoa tse koahetsoeng ka taemane kapa tsa carbide.

• Burr Formation: Li-plastiki tse bonolo li atisa ho ba le li-burrs, tse hlokang mekhoa ea ho senya ka mor'a mochine.

• Botsitso ba Dimensional: Lipolasetiki tse monyang mongobo joalo ka nylon li ka holofala ka har'a vacuum, tsa ama ho mamellana.

Mekhoa e tsoetseng pele, e kang cryogenic cooling le ultrasonic-assisted machining, e ntse e hlahlojoa ho fokotsa litaba tsena, le hoja ho amoheloa ha bona tlhahiso ea li-fasteners tsa sebaka sa sebaka ho ntse ho lekanyelitsoe.

Boitšoaro ba Mechine ea Li-Fasteners tsa Plastiki Libakeng tsa Sebaka

Kakaretso ea Boitšoaro ba Mechini

Boitšoaro ba mechine ea li-fasteners tsa polasetiki sebakeng se laoloa ke karabelo ea bona ho meroalo e boima, e hatellang, ea ho kuta le ea mokhathala tlas'a maemo a feteletseng. Lintho tsa bohlokoa li kenyelletsa:

• matla a: Bokhoni ba ho hanyetsa ho hlōleha tlas'a meroalo e tsitsitseng.

• Khutsa: Deformation e itšetlehileng ka nako tlas'a khatello ea kelello e sa khaotseng, e bohlokoa mesebetsing ea nako e telele.

• Mokhathala Bophelo: Ho hana ho kenya li-cyclic, ho bohlokoa bakeng sa li-fasteners lits'ebetsong tse sisinyehang.

• Ho tiea ha Fracture: Bokhoni ba ho hanela phatlalatso ea crack, ea bohlokoa libakeng tse nang le tšusumetso.

Mehaho ena e lekoa tlas'a maemo a etsisoang a sebaka, ho kenyelletsa vacuum, ho palama libaesekele tse futhumetseng (-150 ° C ho ea + 150 ° C), le ho pepesetsoa mahlaseli (ho fihla ho 10 ^ 6 Gy).

Lintlha tsa Tikoloho tse Amang Botsitso ba Mechini

Vacuum le Outgassing

Ka har'a vacuum ea sebaka (10 ^ -6 Pa), li-fasteners tsa polasetiki li ka 'na tsa tsoa, ​​​​tsa ntša metsoako e sa tsitsang e ka silafatsang optics kapa lisebelisoa tsa elektroniki tse haufi. Lisebelisoa li lekoa ho latela ASTM E595, ka tahlehelo e amohelehang ea boima ba 'mele (TML) e ka tlase ho 1% le ho bokelloa ha thepa e fokolang ea condensable (CVCM) ka tlase ho 0.1%. PEEK le PTFE li bonts'a khase e tlase, e li etsang hore li lokele lits'ebetso tse bobebe.

Thermal Cycling

Liteishene tsa sepakapaka li na le libaesekele tse futhumetseng ka lebaka la liphetoho tsa orbital bosiu. Li-fasteners li tlameha ho boloka botsitso ba li-dimensional le bots'epehi ba mochini ho pholletsa le mefuta e mengata ea mocheso. PI le PEEK li feta PC le nylon, tse nolofatsang kapa tse senyehang mochesong o feteletseng.

Mahlaseli a Mahlaseli

Mahlaseli a cosmic le a letsatsi a senya liketane tsa polymer, a fokotsa matla le ho tiea. PI le PEEK li hanyetsa mahlaseli a bakoang ke mahlaseli ho feta PC, e mosehla le ho phunyeha ka mor'a ho pepeseha nako e telele.

Microgravity

Le ha microgravity e na le tšusumetso e fokolang e tobileng ho mechini ea fastener, e susumetsa lits'ebetso tsa machining Lefatšeng ka ho ama phallo ea chip le phallo ea pholiso. Mechini ea CNC ea li-fasteners tsa boemo ba sebaka e etselitsoe ho etsisa litlamorao tsa microgravity nakong ea liteko.

Lithuto tsa Teko mabapi le Boitšoaro ba Mechini

Lithuto tse entsoeng ke NASA, ESA, le litsi tsa thuto li bonts'itse boits'oaro ba mochini oa li-fasteners tsa polasetiki. Ka mohlala:

• Teko ea Teko: Li-fasteners tsa PEEK li bonts'itse matla a tlhahiso ea 95 MPa ho 23 ° C, a theohela ho 80 MPa ho 200 ° C, ka ASTM D638.

• Creep Testing: Li-fasteners tsa PI li bontšitse khatello ea 0.5% ka mor'a lihora tse 1,000 ho 150 ° C tlas'a 50 MPa, ha e bapisoa le 2% bakeng sa nylon.

• Teko ea Fatigue: Li-fasteners tsa PEEK li ile tsa mamella lipotoloho tse 10 ^ 6 ho 50% ea matla a ho qetela a matla, PC e sa sebetseng hantle (10 ^ 5 cycles).

Tafole e ka tlase e akaretsa liphetho tsa liteko tsa mochini bakeng sa li-fasteners tse khethiloeng.

Letlapa la 3: Lintho tsa Mechini tsa Li-Fasteners tsa Plastiki Tlas'a Maemo a Tšoanelehang a Sebaka. UTS = Matla a ho Fetisisa a Tensile.

Mohlala le Ketsiso

Finite element analysis (FEA) le molecular dynamics (MD) lipapiso li bolela esale pele boits'oaro bo potlakileng tlas'a thepa e rarahaneng. Mefuta ea FEA e kenyelletsa li-equation tsa viscoelastic constitutive equations ho etsisa ho thekesela le ho phomola ha khatello ea maikutlo, ha lipapiso tsa MD li senola scission e bakoang ke mahlaseli boemong ba limolek'hule. Lisebelisoa tsena li tataisa khetho ea thepa le moralo oa fasteners, ho fokotsa ho itšetleha ka liteko tsa 'mele tse theko e boima.

Mehopolo ea Moralo bakeng sa Li-Space-Grade Plastic Fasteners

Moqapi oa Geometri

Fastener geometry, ho kenyelletsa profil ea khoele, sebopeho sa hlooho, le bophara ba shank, e ntlafalitsoe bakeng sa lits'ebetso tse ikhethileng. Meetso e tloaelehileng e kenyelletsa:

• Li-Fasteners tse Khoele: Likhoele tsa metric kapa tse kopaneng (mohlala, M3, 1/4-20) tse nang le li-pitches tse mahoashe ho fokotsa khatello ea maikutlo.

• Li-Fasteners tse Tletseng: Likarolo tsa ho boloka tse kopantsoeng ho thibela tahlehelo ho microgravity.

• Lihokelo tse Tloaelehileng: Libopeho tse sa tloaelehang bakeng sa lisebelisoa tsa tlhokomelo ea beng ba matlo.

Mamello hangata ke ± 0.01 mm ho netefatsa ho lekana le ho sebetsa ho liatlana tsa EVA kapa li-manipulator tsa liroboto.

Phekolo ea bokaholimo

Liphekolo tsa sefahleho li ntlafatsa ts'ebetso ea fasteners:

• Ho ruruha ha Plasma: E ntlafatsa ho khomarela liphahlo le ho fokotsa khase.

• Lubricious Coatings: PTFE kapa molybdenum disulfide coatings fokotsa khohlano ka fastened threaded.

• Mekhahlelo e hanyetsanang le UV: Sireletsa li-fasteners tsa PC ho senyeha ha letsatsi.

Control Quality

Mekhoa ea tlhahlobo e sa senyeheng (NDT), joalo ka X-ray computed tomography le tlhahlobo ea ultrasonic, e netefatsa botšepehi ba kahare. Dimensional metrology e sebelisang metjhini e methang e hokahantsoeng (CMMs) e netefatsa hore e tsamaellana le litlhaloso.

Likopo ho Mecha ea Tlhokomelo ea Seteishene sa Sepakapaka

Li-fasteners tsa polasetiki li bohlokoa ho:

• Mekhoa ea Tšehetso ea Bophelo: Ho boloka lijenereithara tsa oksijene le li-recyclers tsa metsi, moo ho hanyetsanang le kutu ho leng bohlokoa.

• Meroalo ea Mahlale: Ho etsa liteko ka tšitiso e nyane ea motlakase.

• Litokiso tsa Moaho: Litokiso tsa nakoana nakong ea li-EVA, li sebelisa meralo e bobebe le e bonolo ho e kenya.

• Sistimi ea liroboto: Li-fasteners matsohong a robotiki, tse hlokang bophelo bo phahameng ba mokhathala.

Lithuto tsa mohlala, joalo ka ISS's Alpha Magnetic Spectrometer (AMS-02) ka 2019, li totobatsa ho ts'epahala ha li-fasteners tsa PEEK mesebetsing ea maemo a holimo.

Mekhoa ea Kamoso le Litaelo tsa Lipatlisiso

Materials Advanced

Li-polymer tse ntseng li hlaha, joalo ka li-polymer tsa crystal polymer (LCPs) le PEEK e matlafalitsoeng ka carbon-fiber, li tšepisa matla le ho satalla ho matlafalitsoeng. Li-nanocomposites tse nang le graphene kapa carbon nanotubes li ka ntlafatsa ho hanyetsa mahlaseli.

Kenyelletso ea Tlhahiso ea Phatlalatso

Ho etsa li-hybrid, ho kopanya machining a CNC le khatiso ea 3D, ho thusa ho etsa prototyping e potlakileng ea li-fasteners tse rarahaneng. Selection laser sintering (SLS) ea PEEK e ntse e hlahlojoa bakeng sa tlhahiso ea on-orbit.

In-Situ Testing

Ho kenya li-testbeds ho Lunar Gateway ho tla lumella tlhahlobo ea nako ea 'nete ea ts'ebetso e potlakileng, ho fokotsa ho itšetleha ka lipapiso tse thehiloeng Lefatšeng.

itsetsepetse

Lipolasetiki tse ka sebelisoang hape le mekhoa ea ho etsa lintho tse koetsoeng li ntse li etsoa ho fokotsa litšila mesebetsing ea sepaka-pakeng.

fihlela qeto e

CNC machining ea li-fasteners tsa polasetiki tse nepahetseng haholo ke lejoe la sekhutlo la lits'ebetso tsa tlhokomelo ea liteishene tsa sebaka, tse nolofalletsang likhokahano tse tšepahalang, tse bobebe le tse sa jeng. Lisebelisoa tse kang PEEK, PTFE, le PI, tse entsoeng ka lisebelisoa tse ntlafalitsoeng, li finyella litlhoko tse thata tsa libaka tsa sebaka. Lithuto tsa boits'oaro ba mochini, tse tšehetsoeng ke liteko tsa liteko le lipapiso, li netefatsa botsitso tlas'a vacuum, paesekele ea mocheso, le mahlaseli. Ha lipatlisiso tsa sebaka li ntse li tsoela pele, mekhoa e mecha ea thepa, tlhahiso le liteko li tla ntlafatsa le ho feta karolo ea li-fasteners tsa polasetiki ho ts'ehetsa boteng ba batho ho feta Lefatše.

Polelo e Hatisitsoeng: Haeba ho se na litaelo tse ikhethang, lingoloa tsohle tse fumanehang sebakeng sena sa marang-rang ke tsa mantlha. Ka kopo bonts'a mohloli oa khatiso: https: //www.cncmachiningptj.com/ li -ththanks！

PTJ® e fana ka mefuta e felletseng ea Custom Precision cnc machining china ISO 9001: 2015 & JOALOKAHA-9100 pakiloeng. 3, 4 le 5-axis ka potlako e nepahetseng litšebeletso tsa machining tsa CNC ho kenyelletsa le ho sila, ho fetohela ho litlhaloso tsa bareki, Ho khona likarolo tsa tšepe le polasetiki tse nang le mamello ea +/- 0.005 mm.shoa ho lahla,lesela la tšepe 'me stampHo fana ka lipapatso, tlhahiso e felletseng, tšehetso ea tekheniki le tlhahlobo e felletseng likoloi, aerospace, hlobo le sesebelisoa, mabone a lebisitsoeng,ya kalafi, baesekele, le moreki elektronike liindasteri. Ho fana ka nako. Re bolelle hanyane ka tekanyetso ea projeke ea hau le nako e lebelletsoeng ea ho fihla. Re tla rera leano la ho fana ka lits'ebeletso tse baballang litšenyehelo ho u thusa ho fihlela sepheo sa hau, Rea u amohela ho Ikopanye le rona ( sales@pintejin.com ) ka kotloloho bakeng sa projeke ea hau e ncha.