Electro-galvanized cross countersunk drill thread durability? 

Uyawubona lo mbuzo uvela kwii-specs okanye kumxhasi, kwaye ukusabela kwangoko kwamathumbu kuhlala kusithi, Sisijiko nje sokuzibhomba, sinokuba nzima kangakanani? Lo ngumgibe wokuqala. Enyanisweni, ukuqina kwe Intambo yokuqhuba kwi-electro-galvanized cross countersunk head screw ayiyonto enye; yimbi, idabi elisebenzayo phakathi kwengubo, isiseko sesinyithi, unyango lobushushu, kunye nento oyiqhubela kuyo. Ndibone ukusilela okuninzi apho umsonto uqhawula umngxuma okanye inqaku, hayi ngenxa yokuba i-spec yayingalunganga ephepheni, kodwa ngenxa yokuba unxibelelwano lwalungalunganga ebaleni.

Ukungaqondi kakuhle: Ukwaleka vs. Ukusebenza

Uninzi lwabantu lulungisa umaleko owenziwe nge-electro-galvanized njengelona qhawe lokumelana nomhlwa. Kwaye ngokuqinisekileyo, kwishelufu esisiseko kwindawo yokugcina impahla, kulungile. Kodwa xa sithetha ukuqina ye-drill thread ngokwayo-ikhono layo lokusika ngokucocekileyo, ukubamba i-torque, kwaye ungagugi ngaphambi kwexesha-i-zinc plating iphantse ibe ngumlinganiswa wecala. Isenokuba ngumkhohlakali. Idiphozithi ye-electro-deposit engqindilili, elawulwa kakubi inokujikeleza imiphetho ebukhali yomsonto. Ndilinganise iisampulu apho i-plating yongeza umaleko we-micron eyi-15, ngokufanelekileyo ukuthoba umda okhokelayo wefluti. Isikrufu sinokuluphumelela uvavanyo lwesitshizi setyuwa kodwa sisilele ukubhoboza nge-1.2mm yentsimbi yepurlin kumzamo weshumi.

Inkwenkwezi yangempela yintsimbi ye-substrate kunye nonyango lwayo lokushisa. I-case-hardened, i-low-carbon steel screw iya kuba ne-drill point eqinile, i-brittle drill point enokuthi iqhube phantsi komthwalo osecaleni. I-alloy ephakathi kwekhabhoni iya kuba nzima kodwa inokunxiba ngokukhawuleza. Ukuze intambo ihlale, inqaku kufuneka libe lukhuni kunezinto ezisikwayo, kodwa i-shank ngasemva kwayo idinga amandla okwaneleyo okuhlamba ukuze ungachebi. Ukufumana loo gradient ekunene bubugcisa. Ndikhumbula ibhetshi evela kumthengisi-masithi ohloniphekileyo ovela kwiSithili saseYongnian, isiseko esikhulu semveliso eHebei-apho ubushushu bebucimile. Izikrufu ziya kuhamba kakuhle kodwa ke iintloko ziya kuphuma phantsi kokuqina kokugqibela. I umsonto yomelele, isiqhoboshi sasingekho.

Oku kukhokelela kuvavanyo olusebenzayo esiqale ukulwenza ngaphakathi: uvavanyo lokomba olulandelelanayo. Asiqhubeli nje isikrufu esinye kwiphaneli yovavanyo. Sithatha isampuli kwaye siyiqhube kwindawo entsha kwiphepha lentsimbi, siyibuyisele ngaphandle, kwaye siyenze kwakhona. Amaxesha alishumi. Uhlola intambo ukuze ubone i-deformation, i-metal pick-up, kunye nokunxiba kweflank. I-screw ye-electro-galvanized screw ihlala ibonisa i-zinc smearing emva komjikelo wesithathu okanye wesine, okwandisa i-torque ye-drive kwaye kunokukhokelela ekuhlulekeni kwangaphambi kwexesha. Ukugquma kungumnikelo, okulungele ukugqwala kodwa kubi ekugcineni ijometri yokusika ebukhali.

Indima efihlakeleyo yeNtloko ye-Countersunk

Kulula ukungayihoyi intloko. I-cross recess (Phillips okanye iPozi) kunye ne-countersunk angle ayisebenzi. Kuba ukuqina, intloko kufuneka ihlale ngokupheleleyo kwaye icocekile ukuhambisa i-torque yokufakela ngokufanelekileyo kwi-drill thread. Ukuba ikhefu alikho nzulu okanye umqhubi uyaphuma, unikezela ngemithwalo eyothusayo kwaye ukhulule ikhefu ngaphambi kokuba umsonto ugqibe ukusika. Oku kutshabalalisa umngxuma kunye ne-fastener. Sasineprojekthi esebenzisa izikrufu ze-CSK ze-electro-galvanized zokufaka intsimbi edanyazayo. Abasebenzi basendle banike ingxelo yesantya esiphezulu sokuphuma kancinci. Umba wawungeyondawo yokubhola yesikrufu; yayikukuba i-electroplating yakhelwe ngaphakathi kwi-recess, itshintsha iprofayili yayo yokuzibandakanya. Ukudilika ngokukhawuleza emva kokucwenga ngekuyisombulule, kodwa ivenkile yatsiba elo nyathelo ukonga iindleko.

Ukuhlaliswa kwentloko nako kuchaphazela umthwalo wentambo yexesha elide. Isihlalo esingafezekanga senza indawo ye-pivot, evumela ukungcangcazela ukuba kusebenze kwimisonto edibeneyo. Ndibone ukudinwa kukuqhekeka kungaveli kumsonto wokuqala, kodwa kwisiqingatha se-shank, ngenxa yalo mzuzu wokugoba. Ke, umbuzo wokuqina wongeza i-fastener yonke. Umsonto ogqibeleleyo we-drill wehliswa ngentloko engalunganga ngalo lonke ixesha.

Ukuthetha ngababoneleli, ufunda ukuxabisa abo baluqondayo olu nxibelelwano. Kukho umenzi, i-Handan Zitai Fastener Manufacturing Co., Ltd., esebenza ngaphandle kweso siseko sikhulu saseYongnian. Indawo yabo (https //wwww.ziitasteners.com) iinkcukacha zokugxila kwabo kulawulo lwemveliso. Ukusuka kwinto endiyibonileyo, ixabiso labo alikho nje ekwenzeni inxalenye eqhelekileyo, kodwa ekulawuleni olu nxibelelwano lufihlakeleyo-njengokuqinisekisa ukuba ubukhulu be-plating bulawulwa kwiindawo ezibalulekileyo. Lolo hlobo lwengqwalasela ehambisa imveliso ukusuka ekuthotyelweni kobugcisa ukuya kwisigxina esithembekileyo kwintsimi.

Izinto eziguquguqukayo zeNdawo: Yintoni engathethwa ngaMashiti eDatha

Akukho ngxoxo igqityiweyo ngaphandle kwesiphithiphithi sokwenyani. Unokuba ne-electro-galvanized self-drilling screw egqibeleleyo, emva koko idibane nentsimbi epeyintiweyo. Ipeyinti inyusa i-fluti, inyusa ubushushu, kunye ne-zinc ethambileyo yokugquma i-galles, ibambe intambo. Ukuqina kokuqina. Okanye ukuguquguquka kobukhulu be-substrate. Indawo yokubhola ilungiselelwe, yithi, intsimbi ye-2mm. Yiqhube kwi-1.5mm, kwaye ayifumani ukuluma okwaneleyo ukukhupha i-chip ecocekileyo; uyiqhube kwi-3mm, kwaye isebenze-iqinisa isinyithi phambi komtya, ibangele ukuguga okugqithisileyo. Intambo ehlala ixesha elide yomelele kuphela ngaphakathi kwefestile ethile yokusebenza.

Emva koko kukho ukuhluka kwe-installer. Umqhubi wempembelelo yinkosi ngoku, kodwa i-torque yayo eshukumisayo inoburhalarhume kwincam ecekeceke yokusika yomsonto owenziwe nge-electro-galvanized. Umqhubi wokuqhuba we-RPM uthambile kwaye unokukhokelela kumgangatho ongcono womngxuma kunye nobomi obude besixhobo kwisikrufu ngokwaso. Siqhube uthelekiso: ibhetshi yesikrufu esifanayo, izixhobo ezahlukeneyo. Iisampuli zomqhubi wempembelelo zibonise i-deformation ebonakalayo kwintambo ehamba phambili emva kwemijikelezo emi-5. Iisampulu zomqhubi we-drill zisacocekile emva kwe-8. Ukwaleka kwakufana. I Intambo yokuqhuba ukuqina kwakuchazwe yindlela yokufakela.

Uhlalutyo lokusilela luhlala lukhomba emva kwezi zinto zithambileyo. Unokontraka wakhe wakhalaza malunga nokuqhawulwa kwemisonto. Sifumene iisampulu ezingaphumelelanga emva. I-electro-galvanized coating yayinxitywe kwipatheni ye-helical, kwaye isiseko sesinyithi sabonisa iimpawu zokunxiba okunamathelayo. Umoni? Babesebenzisa izikrufu ukuqhoboshela izibiyeli kwintsimbi engapeyintwanga, efakwe emanzini ashushu. Ukusebenzisana kwe-zinc-on-zinc, edibaniswe nobunzima obuphezulu be-HDG yokugqoka, yenza njenge-abrasive paste. Isisombululo ibingesiso isikrufu se-electro-galvanized screw, kodwa sitshintshela kwi-galvanized mechanical or plain phosphate-coated screw kweso sidibaniso sithile.

Ukudityaniswa kwezinto eziphathekayo kunye ne-Corrosion Creep

I-Electro-galvanized yingubo encinci, idini. Indima yayo kwintambo ehlala ixesha elide imalunga nokuthintela umhlwa obomvu onokubangela ukubanjwa kwentambo okanye ukulahleka komthwalo wokubamba ngokuhamba kwexesha. Kodwa kwindawo emanzi okanye eyonakalisayo, i-zinc iyancipha. Ndiye ndaqhawula izikrufu kwicanopy yangaphandle emva kweenyanga ezili-18. Isahlulo somsonto we-drill, esingcwatywe kwi-substrate yentsimbi, sasihlala sikwimo engcono kuneshanki eveziweyo. Ngoba? Yayikhuselwe ngokudibana kwentsimbi ukuya kwintsimbi. Uhlaselo lwe-corrosion lwalubi kakhulu kwindawo yokungena kwintambo, apho ukufuma kunokuhlala khona. Le mveliso ye-corrosion, i-zinc carbonate, ininzi. Iyakwazi ukuvala intambo ngokwasemzimbeni okanye, ngokuchaseneyo, ichithe kwaye ishiye isithuba, ikhulule umdibaniso.

Ngoko ke, ukuqina kwexesha elide akukhona nje ukunxiba ngoomatshini; kukubola kwe-electrochemical. Ukuba isicelo sesofakelo olusisigxina kwindawo enobume obuncinane (efana nendlu yokugcina impahla ene-condensation ngamaxesha athile), i-electro-galvanized standard yanele. Kodwa ukuba kukho naliphi na ithuba lokuphindaphinda imijikelo emanzi-yomileyo, ukuqina kwamandla okubamba intambo akuphazamisi ngenxa yokuguga kwayo, kodwa ngokubola komdibaniso ojikelezileyo. Uqala ukucinga malunga nama-sealants okanye ama-washers, ehamba ngaphaya kwe-fastener ngokwayo.

Oku kundibuyisela kumbuzo wokuqala. Ukubuza malunga nokuqina kwe Intambo ye-Electro-Gal kufana nokubuza ngendlela eyonga amafutha enjini yemoto—kuxhomekeke kwindlela ehanjiswa ngayo, amatayara, indlela eqhuba ngayo nomgangatho wamafutha. Umsonto yinxalenye yenkqubo. Isikrufu esenziwe kakuhle esivela kwindawo elawulwayo njengesiseko esikhulu sokuvelisa sisiqalo esihle. Kodwa ukuqina kwayo okubonakalayo luthethathethwano phakathi koyilo lwayo, ukugquma kwayo, izinto ezisebenzisana nazo, kunye namandla asetyenziswa kuyo. Akukho mpendulo inye, iseti kuphela yamava akuxelela apho aya kuthi asilele khona, ngoko unokucwangcisa ngokufanelekileyo.

Ukuqukumbela Ngaphandle Kwesiphelo

Ngoko ke, yintoni efunekayo? Musa ukuphatha i-spec njengesiqinisekiso. Ukuba ukuqina Umsebenzi wokuqhuba ubalulekile, khankanya uvavanyo lokusebenza olulinganisa usetyenziso lwakho lokwenyani: uhlobo lwemathiriyeli, ubukhulu, isixhobo sokuqhuba, kunye nokubala komjikelo. Phicotha ulawulo lwenkqubo yomboneleli kunyango lobushushu kunye neplating. Inkampani efana ne-Handan Zitai Fastener, ebekwe kwindawo enkulu kunye nezinto eziluncedo zayo, ihlala inomlinganiselo kunye nokugxila ekulawuleni ezi ziguquguqukayo, kodwa kusafuneka uqinisekise. Buza idatha yabo yangaphakathi ye-QC kwiprofayili yobulukhuni bemisonto kunye nokusabalalisa ubukhulu be-plating.

Ekugqibeleni, owona msonto womelele nguwo uhambelana ngokugqibeleleyo nomsebenzi wawo. Ngamanye amaxesha, oko kuthetha ukulahla i-electro-galvanized ukugqiba okwahlukileyo, okanye ukukhetha inqaku elahlukileyo lejometri. Umbuzo okwisihloko sisiqalo esilungileyo, kodwa impendulo ayikhe ibekho kwikhathalogu. Kusevenkileni, kwibhentshi yovavanyo, kwaye ebaleni, egqunywe luthuli lwezinc kunye nentsimbi yentsimbi, ecinga ukuba kutheni isikrufu sesihlanu siqhube nzima kunesokuqala. Kulapho ufumana idatha yokwenyani.