I-polyethylene ye-Ultra-high-molecular-weightweight (UHMWPE, UHMW) i-subset ye-polyethylene ye-thermoplastic.Ikwabizwa ngokuba yi-high-modulus polyethylene, (HMPE),…
I-Ultra High Molecular Weight Weight polyethylene (UHMW-PE) yinjineli ye-thermoplastic enobunzima bemolekyuli obungaphezulu kwe-3.1 AMUs (iiyunithi ze-atomic mass).Ubunzima bemolekyuli obuphezulu buphakamisa inani leempawu zomzimba ezibalulekileyo, kungekhona ubuncinci bezinto ezibalaseleyo zokuxhathisa i-abrasion, amandla empembelelo ephezulu kunye ne-coefficient ephantsi ye-friction.Ukongeza, i-polymer inokumelana neekhemikhali ezilungileyo, iimpawu ezibalaseleyo zokuthomalalisa isandi, i-dielectric ephezulu kunye nepropathi yokufakelwa kombane kwaye ayifunxa ukufuma.
Ezi zakhiwo, ngokudibanisa nokukhululeka kwe-machining, zenza i-UHMW-PE, into ebiza imali ehambelana neemfuno ze-FDA kunye ne-USDA yoqhagamshelwano oluthe ngqo lokutya, isetyenziswe ngokubanzi kumashishini okutya, isiselo, amayeza kunye namayeza.Umgangatho ongekho porous we-UHMW-PE uthintela ukukhula kwefungus okanye ibhaktheriya.I-UHMW-PE ikwasetyenziswa ngokubanzi kwilaphu, ukusetyenzwa kweekhemikhali, ipulp kunye nephepha, imigodi, i-maritime, intsimbi, amanzi kunye nokucocwa kwelindle, ukuphatha imathiriyeli eninzi kunye namashishini ezolimo.
Iimpawu ze-UHMW-PE zinokuphuculwa ngokusetyenziswa kwezongezo ezinje ngemibala, i-UV kunye nezizinzisi zobushushu, i-anti-static agents, izizalisi ezikwaziyo ukunxiba kunye nezithambisi zokunciphisa i-friction.Isinyithi okanye i-ores ingasetyenziselwa ukunyusa ubunzima kwaye yenze i-polymer ibonakale ngokubonakalayo, ngelixa ezinye iifayili zinyusa ubushushu bokusebenza kokusingqongileyo.
Ngenxa yokuba i-UHME-PE iyi-semi-crystalline polymer, kufuneka ifakwe i-sintered nge-compression molding okanye i-extrusion ye-ram.I-Anealing, ngaphambi komatshini, inceda ukususa ukucutshungulwa koxinzelelo olubangelwa yi-sintering.Iindawo ezigqityiweyo zoomatshini nazo zinokukhutshwa, kodwa ezo ndawo kufuneka zilungiswe ngexesha lenkqubo yokupholisa ukuvumela ukushwabana ngexesha lokufunxa.Umatshini orhabaxa kufuneka enziwe phambi kokunciphisa uxinzelelo ukuze utshintsho olunobungakanani bukwazi ukujongana ngexesha lomatshini wokugqibela.
Ifumaneka kumaphepha asemgangathweni, iintonga, kunye neetyhubhu zokuvelisa iindawo ezizinzile ngokwemilinganiselo, i-UHMW-PE inokusarha, igalelwe, ijike, icwangciswe, ibhorwe okanye ibethelwe ngenqindi.Izixhobo zokusika kufuneka zibe nee-engile eziphezulu zeharika kunye nokukhutshwa okwaneleyo kwenqanawa ukuthintela ukuvaleka.Amazinga okutya kufuneka abe phezulu ukwenzela ukuba ixesha elincinci livunyelwe ukuba isixhobo sokusika sitshise izinto ngokukhuhlana.Kufuneka kuthathelwe ingqalelo ukugcina izixhobo zibukhali kuba i-UHMW-PE inokukhawuleza ibe buthuntu imiphetho yokusika izixhobo, ibangele ukugqwetheka kwenxalenye.Ukugqitywa komgangatho ophezulu womgangatho ophezulu kunokufumaneka ngokusebenzisa izixhobo ezifanelekileyo zokusika, nangona iinzame zokuphucula ukugqiba okungahambi kakuhle ngokufayilisha okanye ukukhupha isanti ngokubanzi kuya kubangela ukuba inkangeleko ibe mandundu.
Uninzi lweenkqubo zobuchwephesha zibamba ukunyamezelana phakathi kwe +/-.005 kunye +/-.010.I-Saw cut strips ukuya kubude, nangona kunjalo, ibiza kuba ngu +/-.030 ukusukela oko ireyithi ephezulu ngokufanelekileyo yokwandiswa kwelayini ye-thermal kunye nokucutheka kwe-UHMW-PE yenza ubude beqhekeza lube sesichengeni kutshintsho lwemo engqongileyo.
IiNkqubo zoomatshini
Ukusarha: Ukusarha isetyhula, iiblade ezinencam ye-carbide zinika ezona ziphumo zintle.I-12-14 "i-blade ye-diameter blade kufuneka ibe namazinyo angama-24.Izantya zokutya zinokusuka kwi-10 ukuya kwi-40 iinyawo ngomzuzu.Kwibhendi yokusarha iblade enamazinyo amathathu nge-intshi nganye, iseti yeraker kunye ne-positive angel angel iyacetyiswa.Isantya sokutya sisuka kwi-10 ukuya kwi-40 yeenyawo ngomzuzu.
Ukujika: Sebenzisa amasuntswana esixhobo sentsimbi esinesantya esiphezulu esine-10” ngaphambili nasecaleni kunye ne-15-30” iraki.Izantya zokusika ezisezantsi phakathi kwe-600 kunye ne-1,000 yeenyawo ngomzuzu ziyafuneka.Nangona kunjalo, kuye kufuneke ukubaleka kwi-rpm ephezulu ukugcina iitshiphusi zicocekile kumatshini.Ukusika ulwelo akufuneki kube yimfuneko, kodwa ukuvuthuza komoya ocinezelweyo ngamanye amaxesha kuya kunceda ekususeni itshiphu.Xa uzama ukufezekisa ukunyamezela okusondeleyo okanye inxalenye encinci kakhulu eludongeni kwi-UHMW-PE, umatshini udlula.Susa ubuninzi bezinto ezibonakalayo kwipasisi yokuqala, uze uvumele isiqwenga sihlale kwaye siphumle ubusuku bonke.
Ukugaya: Abasiki benzelwe ukwenza ialuminiyam yomatshini banika ezona ziphumo zibalaseleyo.Isantya sokusika seemitha ezingama-600 ukuya kwi-1,800 ngomzuzu siyacetyiswa, ngesantya esondliweyo esimalunga ne-intshi ezi-0.01 ngenguquko nganye.Amasuntswana e-router asebenza kakuhle kwi-slotting kunye nokugaya ukukhanya.
Ukucwangcisa: Iiplani zokhuni zinciphisa ngokulula ubukhulu kunye nenyani-phezulu umphezulu we-UHMW-PE.Umatshini oqinileyo onamaphiko abukhali uya kunika ukususwa kwesitokhwe ngokufanelekileyo kunye nokugqiba kakuhle komhlaba.Ukunciphisa amandla okujika xa usenza i-UHMW-PE, yenza isiqingatha sobukhulu obufunwayo kwicala ngalinye lephepha.
Ukugrumba: Imizobo yesiqhelo yesantya esiphezulu yanele kwizicelo ezininzi zokomba.Ukuze usebenze ngeyona ndlela iphezulu, sebenzisa i-helix drill ekhethekileyo enefluti ekhazimlisiweyo.Ukubhoboza imingxuma yokulingwa phambi kokubhoboza umngxuma omkhulu akukhuthazwa kwi-UHMW-PE, kuba iipropati zayo zibangela ukuba i-drill ibambe kwaye itsale ngokwayo kwizinto eziphathekayo.
Ukugaya/Ukufaka isanti: Ngenxa yeempawu ze-UHMW-PE ezixhathisa ibrasion, ukucola kunye nokusantiya kudla ngokungasebenzi.Enyanisweni, ukucola kusenokubangela ukuba izinto zinyibilike zize ziqabe, nto leyo ebangela ukuba ivili lokusila livaleke.
I-UHMW-PE iguqulwe ngezongezo ezifana neglasi okanye i-metallic oxides iya kubangela ubomi obufutshane besixhobo.Nangona izixhobo ze-carbide ziyakongeza ubomi kwisixhobo, zifuna isantya esiphezulu kunye nokutya.Ezinye izinto ezinepesenteji ephezulu kakhulu yezongezo ze-abrasive azinakwenzeka kumatshini nangayiphi na indlela.
Ukuqulunqa kunye nokuWelding
I-UHMW-PE inokutshisa-eyakhelwe emsebenzini ukwenza ukugoba okulula kunye nee-engile eziququzelela ukufakela.Kungakhathaliseki ukuba yeyiphi indlela ekhethiweyo - itotshi, i-heater yombane, i-oven okanye ibhafu - isilumkiso kufuneka sisetyenziswe kwaye yonke imizamo yenziwe ukuba ingagqithisi izinto.I-UHMW-PE, njengazo naziphi na iiplastiki, ziya kutsha phantsi kweemeko ezingafanelekanga.Ukongeza, umjikelo wokupholisa opheleleyo uya kuba mde ngandlel' ithile kunomjikelo wokufudumeza ngenxa yeempawu eziphezulu zokugcina ubushushu be-UHMW-PE.Ukupholisa akufanele kwenzeke kwikhonkrithi okanye kumphezulu wesinyithi kuba inkqubo iya kukhawuleza kakhulu kwaye inokwazisa uxinzelelo olongezelelweyo kwizinto eziphathekayo.Isincomo esongezelelweyo kukugubungela izinto eziphathekayo ngengubo yokugquma eyenziwe kwizinto ezifana ne-fiberglass.
I-UHMW-PE eyenza i-Cold-forming isoloko isetyenziswa xa kukho imfuneko yokufaka amagophe kunye nee-engile.Nokuba usebenzisa i-brake press, rolling, handforming or use bolts to draw and form the piece in place, i-angle kunye neegophe kufuneka zigotshwe ngokungaphaya kwe-75 ukuya kwi-100 yeepesenti ukuhlawulela umphumo we-springback we-UHMW-PE.Amandla okuqhekeka koxinzelelo anokuncitshiswa ngokusebenzisa amaphepha 3/8” okanye anciphe xa kubanda.
I-spin okanye i-welding ye-frictional inokufezekiswa kusetyenziswa i-lathe yomatshini eqhelekileyo ekwaziyo ukusuka ku-550 ukuya ku-560 rpm ngokukwazi ukuyeka ukujika ngoko nangoko ibrake igalelwe, kunye nepleyiti egciniweyo yentsimbi eyi-¼” yentsimbi, enobubanzi obungaphantsi kancinane kuneflange. OD.Olu hlobo lweweld lufuna iiyure ezingama-48 zokucwebezela ngokupheleleyo phambi kokuba umbhobho ufakwe kwinkonzo.
Butt, okanye ipleyiti hot wilding ukudibanisa sheets tyaba zibe ngamaqhekeza elide okanye iikhoyili, kufuna ukusetyenziswa kwesixhobo zokufudumeza metal, eziqatywe nge-arhente non-intonga, ekwaziyo ukufikelela ubushushu obuyimfuneko ukuzisa ipolima kwimo enyibilikisiweyo.Le nkqubo idinga ukusetyenziswa kwezixhobo ezikhethekileyo zasendle ukuze kuphunyezwe i-welds efanayo kunye namandla phakathi kwe-85 kunye ne-100 yeepesenti yamandla ezinto zokuqala.
Izinto zokuncamathelisa
I-coefficient ephantsi ye-friction, i-non-porous surface ye-UHMW-PE yenza kube nzima ukuba nayiphi na i-adhesive ingene kwi-polymer kwaye yenze ibhondi.Qhagamshelana nomboneleli wakho wokuncamathelisa ngeenkqubo ezicetyiswayo zokudibanisa i-UHMW-PE kwiisubstrates ezahlukeneyo, nangona iziqhoboshi zoomatshini ziyacetyiswa kuninzi lwezicelo.
Ixesha lokuthumela: Jan-24-2018