Isikhokelo somphathi wentsimiii-welds ze-exothermic ezingasebenziyo— izizathu ezintlanu zenkqubo, indlela yokuxilonga, kunye novavanyo lokungaphumeleli kwe-weld olusebenzisanayo onokulusebenzisa ngaphambi kokuba ucime nantoni na.
- Uninzi lokusilela kwe-exothermic weld "ngequbuliso" alukhawulezi konke konke: uphicotho lwethu lwangaphakathi lwe-312-failure (2023–2026) lulandele i-86% ukuya kwenye yezizathu ezintlanu zenkqubo ababoneleli abangazibhali rhoqo - ukufuma okubambekileyo (38%), i-graphite egugileyo (24%), umgubo omncinci (17%), ukulungiswa komqhubi ongcolisiweyo (14%), okanye ixesha lokutsha kwe-cold-mold (7%).
- Ijoyinti ebonakala ichanekileyo isenokulinganisa i-800 micro-ohm xa ithelekiswa ne-30–50 micro-ohm ephilileyo, kuba ukujonga ngamehlo akuboni ukuxinana kwe-conductor-side okanye i-oxide lamination.
- Amalungu angasebenziyo awanakugalelwa kwakhona endaweni yawo — nciphisa ubuncinane i-50 mm yesikhondisi udlule kwindawo echaphazelekileyo bubushushu, chonga unobangela, uze ulungise kwakhona ngesikhunta ngaphakathi kwefestile yaso yenkonzo ye-50–100.
- NgokweIsalathiso sikaCadweld se-nVent ERICO, le nkqubo ivelisa i-molecular bond, hayi eye-mechanical — ngoko ke nayiphi na imo yokusilela edala i-interface (ifilimu yokufuma, i-oxide lamination, i-void) iyoyisa iteknoloji evela ngaphakathi.
- Zethuumgca wokubumba we-thermit weldingilinganiswe ngemijikelo engama-50–100 kunye namalungu angama-80–100 asetyenziswa entsimini, enziwe ngomatshini wegrafiti yeprimiyamu ukuze umngxuma uhlale ixesha elide — kodwa umngundo ongaphandle kwefestile awusengumngundo, ngumthwalo.
- Sebenzisa i-interactiveUkuxilongwa kokusilela kweWeldngezantsi ngaphambi kokuba usike ilungu elinye — khetha uphawu olubonayo kwindawo oza kudibana kuyo uze ufumane unobangela onokwenzeka kunye namanyathelo okuphatha ngokukhawuleza.
Kwinyanga ephelileyo, ndafumana amacandelo amabini anqamlezileyo ebhentshini yam. Zombini zivela kwiigridi zomhlaba ze-33 kV. Zombini zithathwe kwi-10× magnification efanayo phantsi kwesibane esifanayo. Kunjineli oselula ofunda ingxelo yokumisela, zazifana nge-weld. Kumthengi osayina amaphepha ovavanyo, zazifana nge-weld. Zazingafani nge-weld.
Omnye ulinganise i-28 micro-ohm waza waphumelela okokuqala. Omnye ulinganise i-640 micro-ohm waza wahluleka ngaloo mini inye. Usapho olufanayo lwe-mold, umthengisi ofanayo we-powder, ujikelezo olufanayo lwabasebenzi ababini. I-bead kuzo zombini iindawo yayijongeka ilungile emehlweni nakwikhamera yobushushu. Umahluko wawukho kwi-6 millimeters ye-conductor eyayisulwa lilinye iqela nge-isopropyl pad engena-lint kwaye elinye lisulwe ngeglavu yesikhumba esitsha.
Esi sikhokelo sithetha ngaloo msantsa. Ngenxa yokuba inkqubo ye-exothermic ithembekile ngendlela engaqhelekanga ngendlela ethile - yonke impazamo eyenzayo ishiya uphawu lweminwe kwicandelo elinqamlezileyo - kwaye ngokungathembekanga ngendlela engaqhelekanga ngenye indlela - i-bead ephezulu isoloko ibonakala ilungile nokuba uphawu lweminwe olungezantsi lubulala. Izizathu ezihlanu ezilandelayo zizibonakaliso zeminwe endihlala ndizibona ebhentshini lam, ngokulandelelana endihamba nomthengi kuzo xa ingxelo yomyalelo ingena ngendlela engalunganga.
Ndihambe malunga nama-200 ezi fowuni kwiminyaka emithathu edlulileyo. Ndingathanda ukuba ama-200 alandelayo angenzeki. Funda oku kube kanye ngaphambi kokuba uthele kwakhona — kubiza kancinci kunokuphinda uthele, kwaye iimpendulo ziyafana nezo ndizinika ubuso ngobuso.
Ukufunda i-Cross-Section Beats Ukufunda i-Bead
Yonke ingxelo yokugunyaziswa edlula edesikeni yam indixelela into efanayo malunga nokusilela: ijoyintiwajongangokuchanekileyo ngosuku lokuphuma. Ukuhlolwa okubonakalayo kuphumelele. I-thermal scan iphumelele. Icandelo elinqamlezileyo lithethe inyani. Le yindlela endicela ukuba uyisebenzise - kwaye yileya eyakhelwe kuyo iwijethi yokuxilonga ezantsi kweli nqaku.
Ndifunde oku ngendlela enzima phakathi kowama-2024. I-utility yaseYurophu isithumelele iijoyinti ezingama-23 ezikhutshiweyo kwigridi yokugrumba yesitishi se-110 kV — nganye kuzo yayisele idlulile kwi-commission kwiinyanga ezintathu ngaphambili, inesimo se-bead, i-thermal scan, kunye nokumelana kwe-milliohm konke oku kuqhelekileyo. Sizivule ngemini enye emva kwemini.Ezili-17 kwezingama-23 zibonise iziphene ezibonakalayo kwiindawo ezinqamlezileyo: i-oxide lamination kwi-9, imingxuma yokuvuthuza kwi-5, ukugcwalisa ngaphantsi kwi-3. Akukho namnye owayenokubanjwa yi-visual commissioning pass eqhelekileyo. Le nkampani ibisayine amalunga awayesifa buthule kangangeminyaka - babengekayazi loo nto.
Qala ngombuzo wokuqala, hayi owesithathu. Xa umakhi endibiza nge-"weld ehlulekile", ndibuza loo nto ngaphambi kokuba ndibuze nantoni na:ingaba ilungu lakha laphumelela uvavanyo lokuxhathisa, okanye lahluleka ekuqaliseni ukusebenza kwalo okokuqala xa lalilinganiswa?Impendulo itshintsha yonke into, kuba ilungu eliye lonakala ekusebenzeni kunye nelungu elalineengxaki kwi-pour-day ziingxaki ezimbini ezahlukeneyo ngokupheleleyo ezinezizathu ezimbini ezahlukeneyo ngokupheleleyo.
Ngokweencwadi zolawulo lokwaluphala malunga noqhagamshelo lombane olufihliweyo olubhekiselwa kwi-US equity (I-NUREG-1800, ingxelo yeZifundo zoBudala eziFundiweyo ngokubanziisetyenziselwa ukuthethelela amashumi eminyaka okwandiswa kobomi bezityalo), iindlela ezibhaliweyo zokuwohloka kwamalungu angcwatyiweyo zii-thermal cycling, i-ohmic heating, i-vibration, kunye ne-corrosion - kwaye ingxelo icacile ukuba ezi ziindlela ezisebenza kwiindawo ezisebenzisanayo.i-exothermic weld ayinayo indlela yokujonga ubudala, kuba ii-conductors kunye nobhedu olunyibilikisiweyo ziba yinxalenye enye yesinyithi eqhubekayo ngexesha lokusabela. Ngoko ke xa i-exothermic joint ethelwe kakuhle ingaphumeleli ukusebenza, ukusilela akusoloko kukwi-weld metal ngokwayo — ikwicandelo le-conductor apho i-weld ingafikelelwanga khona, okanye kwi-micro-gap ye-thermal-cycling i-weld eshiywe ngasemva kuba i-powder charge yayingalunganga ngomhla wokuthululwa.
Yintoni "isiphene esivela kwi-pour day" ebonakala ngathi kuvavanyo lwe-forensic
Iijoyinti ezingamakhulu amabini zaseCebu zindifundise indlela enye eye yahlala iqinile kuzo zonke iintsilelo zamalungu amaninzi endizihambileyo ukusukela ngoko. Xa sinqumla ijoyinti engasebenziyo sivula kwaye sicoca icandelo elinqamlezileyo, sibona enye yezakhiwo ezincinci ezintlanu eziphindaphindayo, kwaye nganye ihambelana kakuhle nenye yezizathu ezintlanu zenkqubo kulo lonke eli nqaku:
| Iminwe yecandelo elinqamlezileyo | Apho ungayifumana khona | Iimephu ezibangela |
|---|---|---|
| Imingxunya yokuphefumla eqokelelene kufutshane nomphezulu womqhubi | Ngaphakathi kwentsimbi ye-weld, ngaphakathi kwe-1–2 mm ukusuka kumphetho womqhubi | Isizathu 1 — Ukufuma (umgubo, umqhubi, okanye ukufuma kwesikhunta esibandayo) |
| I-oxide lamination ehambelana ne-axis yomqhubi | I-plane ebukhali phakathi kwesinyithi esitshixiweyo kunye nomphezulu we-conductor, ibonakala emva kokupolisha | Isizathu sesi-4 — Indlela emfutshane yokulungiselela umqhubi (ifilimu yeoyile, i-oxide eseleyo, ukudibana nolusu) |
| Umngxuma ozaliswe ngaphantsi onomphezulu oneentsimbi ezicoliweyo | Izitya zomphezulu weentsimbi ngaphakathi; umngxuma awusazalisi kakhulu njengoko bekucwangcisiwe | Isizathu sesi-2 — Ukonakala komngundo, okanye Isizathu sesi-3 — Itshaja yepowder encinci |
| Umgca ovaliweyo obandayo apho iinxalenye ezimbini zesinyithi zingakwazanga ukudibana khona | Ukungaqhubeki okubukhali kwisakhiwo seenkozo ezihambelana nodonga lomngxuma | Isizathu sesi-5 — Ixesha lokutsha kwesikhunta esibandayo (isikhunta esingaphantsi kwama-25 °C xa kutsha) |
| I-weld ibotshelelwe komnye kuphela wabaqhubi ababini kwi-crossover | Ibonakala kwicala: intsimbi igubungela icala elinye kuphela lesibini esijikelezayo | Isizathu sesi-3 — Ubungakanani obungaphantsi komgubo, okanye ukungalungelelani komngundo xa uvala |
Wakuba ufunde ezi minwe mihlanu, incoko yokusombulula iingxaki ayisayi kuba yinto yokuqagela. Okuseleyo kwesi sikhokelo kuhamba ngendlela endiya kuyiphanda ngayo kwindawo, kunye nenyathelo lokuqinisekisa eliyingqinayo ngaphambi kokuba usike elinye ilungu.
Ngaba ukufuma yingxaki yokwenyani xa i-Thermit Weld ingaphumeleli?
Ukufuma yeyona nto ndikhokela kuyo kuba yeyona nto ixhaphakileyo kwaye ixolela kakhulu. Ubhedu olunyibilikisiweyo oluvela kwi-exothermic reaction luhlala malunga ne-1,083 °C — indawo yokunyibilika kobhedu — kwaye kwangoko xa ludibana namanzi, loo manzi ayabila abe ngumphunga aze ande malunga namaxesha ayi-1,700 ngobuninzi. Umphunga unyanzela indlela yawo yokubuyela kwisinyithi esinyibilikisiweyo, ushiye umkhondo wemingxuma yokuvuthela, kwaye ijoyinti iyachaphazeleka ngaphambi kokuba iphole.I-OSHA Standard 29 CFR 1910.252 (Ukuwelda, Ukusika, kunye nokuBela — Iimfuno eziQhelekileyo), le ndlela inye ibangele ukwenzakala okukhulu kokutsha kunye nokutsha kwabasebenzi kunayo nayiphi na enye impazamo yenkqubo ye-exothermic.
Isizathu sokuba oku kungaphumeleli ngokuthula kukuba umswakama unendawo ezintathu zokufihla, kwaye inye kuphela kuzo ecacileyo. Kuphicotho lwethu lwe-312-failure, ukusilela okuqhutywa ngumswakama kubonise uphawu lokumelana olucacileyo: ukufundwa kokugunyaziswa okuqokelelene phakathi kwe-580 kunye ne-940 micro-ohm kwiibini ezifanayo zomqhubi ezihlala zilinganisa i-30 ukuya kwi-50 micro-ohm - ukushukuma kwe-15 ukuya kwi-25× okusinda kwiskena sobushushu kodwa ongasoze usinde kwi-cross-section cut.
- Umgubo omanzi.Eyona nto ixhaphakileyo yokusilela kobuninzi. Umgubo uthunyelwa kwiitini ezivaliweyo ngesizathu esithile — xa itini ivuliwe, umxholo uya kuba hygroscopic kwaye uya kufunxa umswakama ongqongileyo kwiindawo ezikufutshane nemozulu kunxweme kwiiyure ezimbalwa. Ikhatriji "ebonakala yomile" ayomi.
- Abaqhubi abamanzi.Intambo yobhedu kunye nentsimbi egqunywe lubhedu zombini zigcina umswakama kwiindawo ezingaphakathi kwentambo. Intambo ebigcinwe ingagqunywanga kwindawo ngexesha lemvula imanzi ngaphakathi nokuba ngaphandle ibonakala yomile, kwaye umphezulu owomileyo ngetotshi uya kuphinda ufunxe umswakama kwimizuzu embalwa emoyeni ofumileyo.
- Ukufuma kwesikhunta esibandayo.I-graphite mold ekhutshwe kwindawo yokubeka umoya opholileyo kwi-18°C isiya kusasa kwi-32°C, 85%-umswakama iya kujika i-film yamanzi eludongeni lwayo ngaphambi kokuba abasebenzi babe nomqhubi endaweni yayo. Emva koko i-galela ibamba loo film phakathi kodonga lwe-mold kunye nesinyithi esinyibilikisiweyo.
Ukuhlolwa kwesidumbu saseCebu kwimigca emithathu
Iindawo zokufaka ityuwa eCebu zasilela kuba umgubo wawuhleli kwidokhi emanzi ngenxa yemvula kwaye abasebenzi bavula iitini ngentsasa yokugalela. Basebenzise umgubo nangona kunjalo kuba wawubonakala womile - kwaye icala elingaphantsi le-bead, kuyo yonke indawo yokufaka ityuwa engasebenziyo, labonisa ipateni edibeneyo yomngxuma oshiyekileyo emva komphunga oqhutywa ngumswakama. Ukuhlolwa kwe-desiccant yemizuzu engama-20 kwiikhatriji ezintathu zesampuli ngaphambi kokuba kugalelwe kwakuya kubamba lonke iqela, kwaye abasebenzi babeya kuba bazi ukuba bazivalele abanye.
Ngaba iGraphite Mold yakho igugile ngaphaya kwefestile yayo yenkonzo ethembekileyo?
Le yimbangela yokuba ababoneleli bajongane nemeko embi kakhulu, kuba indlela yokusilela ayibonakali kumthengi kwaye ukubalwa kwemijikelo yinto eyaziwa ngumthengisi kuphela.Uncwadi lwemveliso ye-nVent ERICO's CadweldIigrafu zegrafiti zilinganisa imijikelezo yenkonzo emalunga nama-50 ukuya kwi-100, kwaye kumgca wethu silinganisa zethuiimbumba zokuwelda ze-thermitngemijikelo efanayo engama-50 ukuya kwe-100, kunye namalungu angama-80 ukuya kwe-100 asetyenziswa ngendlela eqhelekileyo ebaleni. Emva koko, umngxuma ukhukulisekile ngokwaneleyo kangangokuba umngxuma wempompo awusakwazi ukulinganisa isinyithi esinyibilikisiweyo kakuhle kwilungu.
Isibonakaliso esinyanisekileyo sesikhunta esigugileyo asikuko ukuqhekeka onokukubona — yikhunta eliweldayo elilahlekelwa yimo yalo yomqamelo kwaye liqala ukutyibilika ngaphakathi embindini. Isikhunta esitsha sivelisa ikhunta eligoba kancinci phezu komqhubi, kuba itshaja yempuphu igcwalisa kancinci umngxuma kwaye itshixa engaphezulu ingena kwi-riser. Isikhunta esigugileyo siyazalisa ngaphantsi, kuba umngxuma ukhulu ngokwaneleyo kangangokuba itshaja yempuphu efanayo ayisenawo ubuninzi bokugoba. Abasebenzi bayayilungisa ngokongeza umgubo, othi emva koko ufudumale umngxuma kwaye ukhawulezise ukuguguleka — i-feedback loop ethatha malunga namashumi amabini eemililo ezimbi ukutshabalalisa isikhunta ngokupheleleyo.
Indlela yokubeka amanqaku kwisikhunta ongazange usithenge kuthi
Ngowama-2023 umthengi wafumana iimold ezingama-47 kumthengisi ongasasebenziyo waza wasicela ukuba sizibeke kwinqanaba ngaphambi kokuba siphinde sigalele enye. Salinganisa imold nganye ngokuthelekisa nobunzima bayo bokuqala obulinganisiweyo saza sajonga ii-5-joint cross-sections kwimold nganye engaphezulu kwama-30 grams ubunzima bayo obungaphantsi.Ezili-11 kwezingama-47 zilahlekelwe ziigram ezingaphezu kwama-50— ngaphaya kakhulu kwefestile yabo yenkonzo ethembekileyo — kwaye nganye kwezo zi-11 ivelise iijoyinti ezinomphezulu oneentsimbi ezidityanisiweyo ezingaphumelelanga kuvavanyo olunqamlezileyo ngaphakathi kokuthulula kathathu. Sitshintshe ezo zi-11, saphinda sabeka kwakhona irekhodi yomjikelo, kwaye izinga lokusilela komthengi kuloo projekthi lehla ukusuka kwijoyinti enye kwii-5 ukuya ngaphantsi kwe-1 kwii-50. Leyo yindlela eyenzeka ngayo ingxaki edalwa yi-mold engafakwanga.
Ukuba uzuze ilifa lee-molds komnye umthengisi, linganisa enye kwi-mold eyaziwayo ye-geometry efanayo. I-graphite mold ilahlekelwa malunga ne-3 ukuya kwi-8 grams ngomjikelo ngamnye ngenxa yokukhukuliseka kobushushu kunye nokucoca; i-mold engama-50 grams phantsi kobunzima bayo bokuqala ibinemijikelo engaphezulu kunokuba ivumela umlinganiselo wayo. Okwesibini, jonga imo ye-weld bead kwii-pour ezintlanu zokugqibela - ukuba kukho nayiphi na kuzo edityaniswe ngaphakathi, i-mold ityhalelwe ngaphaya kwefestile yayo yenkonzo ethembekileyo.IEEE Std 837-2014, isakhelo seziqinisekiso zoqhagamshelwano olusisigxina lwesiseko somhlaba, ijiyometri yomngxuma we-weld yinxalenye yobungqina beziqinisekiso - ngoko ke isikhunta esigugileyo asingomngcipheko womgangatho nje kuphela, singumngcipheko wokuthobela umthetho ngokuchasene nomgangatho ijoyinti eyayichazwe kuwo.
Ngaba i-Powder Charge engancinci ingaphazamisa ii-Welds zakho ngokuzolileyo?
Umgubo uza ngobukhulu obuqhelekileyo bekhatriji ngesizathu.Ngenxa yokuba umlinganiselo womgubo ukuya kubhedu lutshintsho olumisela ukuba impendulo ivelisa ubushushu obaneleyo ukunyibilikisa ngokupheleleyo icandelo elinqamlezileyo lomqhubi, ukuncitshiswa kwekhatriji kudala ijoyinti ethulula into eqinileyo ngaphandle kodwa idityaniswe kancinci kwindawo edibanisa umqhubi.I-bead ibukeka ilungile. Ukumelana kuthetha inyani emva kweenyanga ezintandathu xa ilungu lishushu phantsi komsinga wokuqala we-fault.
Sibhale oku kanye kwimeko ka-2024 eNtshona Afrika. Umthengisi wayalela ii-exothermic joints ezingama-600 zegridi yomhlaba yesitishi esingama-66 kV waza wamkela ixabiso lee-cartridges ze-#115 ngaphandle kokuqinisekisa indibaniselwano ye-conductor - eneneni yayiyi-95 mm² / 95 mm² cable pair eyayifuna i-#150. Umthengisi wathumela i-#115. I-joint nganye yathululelwa kakuhle. I-joint nganye yadlula kwi-commission kwi-60 ukuya kwi-90 micro-ohm ebonakala isempilweni. Kwiinyanga ezintandathu kamva, ii-joints ezingama-38 kwezingama-200 zokuqala ezivavanyiweyo zazisele zidlule kwi-800 micro-ohm phantsi komthwalo. Asizange sifumane ukungalingani kwe-cartridge de umthengi wasithumelela isampuli engaphumeleliyo kwaye sayinqumla - i-bead yayiyincwadi yesifundo, kodwa i-interface ye-conductor-to-weld ibonise i-micro-gap eqhubekayo malunga ne-0.2 mm ububanzi.Intsimbi yayichanekile; ikhatriji yayichanekile; umthengi wayihlawulela xa ephinda egalela impahla aze ayityelele ngewaranti.Zombini iinguqulelo zale mpazamo zikhona — ukutshintshwa kweqela elithembekileyo kunye nokutshintshwa kwababoneleli abangathembekanga — kwaye zombini ziphela kwindawo enye: intsimbi entle, isithuba esifihlakeleyo kwi-conductor, kunye nokumelana okunyuka unyaka nonyaka.
Ngaba ii-Shortcuts zokulungiselela umqhubi ziyimbangela efihlakeleyo yamalungu axhathisa kakhulu?
Ndibukele amaqela echitha imizuzu engamashumi amabini ecoca inxalenye ebonakalayo yomsonto wobhedu aze atsibe icandelo elingena ngaphakathi komngxuma womngundo, kuba iphepha leenkcukacha lithi "icocekile ukuya kwisinyithi esikhanyayo" ngaphandle kokuchaza ukuba njani.Ngenxa yokuba i-bond iyenzeka kumphezulu we-conductor ongaphakathi komngxuma ngexesha lokuthululwa, icandelo elingcolileyo phantsi komngxuma lenza i-joint eqhubekayo ngaphandle kunye ne-oxide-laminated ngaphakathi.
Eyona nto ixhaphakileyo endiyibonayo kwiindlela zokulahla inkunkuma ayingomdaka — yiminwe. Abasebenzi baphatha icandelo lomqhubi elingena ngaphakathi kwisikhunta, bashiye ifilimu yeoyile encinci eluswini lwabo, kwaye ubhedu olunyibilikisiweyo alunakumanzisa kuloo filimu ukuze ludibane nesinyithi esisisiseko. Isiphumo sijoyinti eneplani ye-oxide eqhubekayo phakathi kwesinyithi esiweldayo kunye nomqhubi, kwaye iplani ye-oxide luhlobo lonxibelelwano olubhalwe yi-NUREG-1800 njengendlela yokuwohloka phantsi komjikelo wobushushu.
Ndihambe nomthengi emva koqeqesho lokuphinda kuqhutywe kunyaka ophelileyo emva kokuba isikhululo sabo sesithathu silandelelana sivelise amalungu anomlinganiselo ongaphezulu kwe-800 micro-ohm xa sisebenza — uphawu olufanayo ngalo lonke ixesha: i-oxide lamination ehambelana ne-axis ye-conductor, engabonakaliyo ngaphandle komngxuma. Abasebenzi bebecoca inxalenye ebonakalayo ye-conductor ngesandla esineglavu, emva koko babeka umtya phantsi kwidrama yekhebula enothuli kangangemizuzu engamashumi amathathu eyathathayo ukuze i-mold ifike kwindawo yayo. Utshintsho oluthathu lwayivala: ibrashi ebukhali ezinikeleyo kwisixhobo ngasinye se-conductor, i-isopropyl wipe kwilaphu elingena-lint, kunye nomthetho wokuba icandelo elicociweyo kufuneka lihambe ngqo ukusuka kwibrashi liye kumngxuma — akukho kuthintana kwesikhumba, akukho kuseta kwakhona kwidrama. Izinga labo lokumelana okuphezulu lehle ukusuka kwi-12% yamalungu ukuya ngaphantsi kwe-1% kwi-200 yokuthulula elandelayo, kwaye i-1% esele ilandelelwe ngamalungu amabini eqela angazange afunde olu qeqesho lutsha okwangoku.
Isizathu sokuba ndibize olu tshintsho ngokukodwa kukuba lonke lwalusele lukwinkqubo yalo ebhaliweyo. Le nkqubo yayingahoywanga kuba akukho mntu wakha walandela ukusilela kwiglavu, kwaye iphepha leenkcukacha alizange licacise ikhonkco.Ngenxa yokuba i-bond yakheka kumphezulu we-conductor ongaphakathi komngxuma ngexesha lokuthululwa, lonke uqeqesho lokucoca lubaluleke kuphela kwiimilimitha ezingama-30 ukuya kuma-50 ezingena kumngxuma - kwaye kulapho abasebenzi banokutsiba khona inyathelo.I-200 mm ecocekileyo ye-conductor ebonakalayo ayithethi nto ukuba i-40 mm yokugqibela ngaphakathi komngxuma ifumene ifilimu ye-oxide okanye uphawu lweminwe kwimizuzwana engamashumi amathandathu ngaphambi kokuba kuthululwe.
Ngaba iCold-Mold Ignition Time ibangela ukungaphumeleli kwakho kweMorning-Shift?
Le yimbangela yokuba akukho mntu ubhala phantsi, kuba ivakala ngathi yimpazamo yomqhubi kunokuba yimpazamo yenkqubo. Inyani kukuba impendulo ye-exothermic ilungelelaniswe kwi-thermal envelope ethile, kwaye isikhunta esingaphantsi kwama-25 °C ngexesha lokutsha siziphatha ngendlela eyahlukileyo kuneso sifudunyezwe kwangaphambili. Umgubo wokuqala uyavutha, i-reaction front isasazeka ngetshaja, kodwa ubhedu olunyibilikisiweyo lulahlekelwa bubushushu kwi-graphite ebandayo ngokukhawuleza kunokuba i-reaction inokuyizalisa, kwaye isinyithi sifikelela kwi-conductor cavity engaphantsi kobushushu be-fusion. I-bead isakhiwa. I-fusion ayiphelelanga.
Le yingxaki enkulu yokutshintsha kwasekuseni kwiindawo ezinemozulu epholileyo okanye ebandayo, kwaye yingxaki enkulu yokutshintsha kwasemva kwemini kwiindawo ezishushu apho abasebenzi bezipholisa iimold zabo kwindawo yokugcina enomoya opholileyo ukuze "bazigcine". Nayiphi na indlela ivelisa ipateni efanayo yokusilela: umgca ovaliweyo apho imigca emibini yesinyithi idibana khona kodwa ayizange idibane ngokupheleleyo, ebonakala kwicandelo elinqamlezileyo njengokungaqhubeki okubukhali kwisakhiwo sengqolowa esihambelana nodonga lwe-cavity. Kwiprojekthi yeziko ledatha laseSingapore ngo-2024, abasebenzi bagcina iimold zabo zegrafiti kwigumbi lokugcina eline-air-conditioner eliyi-19 °C phakathi kokuthulula ukuya kwi-oxidation yegrafiti ecothayo. Indawo yokuthulula ngokwayo yayikwi-31 °C kunye nomswakama we-78%. Silinganise ubushushu bomphezulu wemold xa kutshiswa kwiindawo ezili-12 zokufuduka kusasa: ezisi-8 kwezili-12 zaphuma kwindawo yokugcina ngaphantsi kwe-22 °C, kwaye ezi-6 kwezo zi-8 zavelisa ukusilela kokuvala okubandayo kwicandelo elinqamlezileyo. Ulungiso lwalulutshintsho olunye lokusebenza — indawo yokugcina ubusuku bonke kwikhabhathi yobushushu obuphakathi endaweni yegumbi elinomoya opholileyo — kwaye izinga lokungaphumeleli ngexesha lokutshintsha kwasekuseni lehla laya ku-zero kwiveki elandelayo. Izibalo azixoleli: rhoqo kwi-5 °C isikhunta sihlala ngaphantsi kwe-25 °C xa sitsha sinyusa ngokulinganisela izinga lokuvala kubanda, kwaye ngaphantsi kwe-20 °C iba yindlela yokusilela ebalaseleyo.
Uluhlu lokuHlola lweForensic: Okufanele ukwenze xa iJoint Joint ingaphumeleli ekuthumeleni umyalelo
Xa umthengi endifowunela nge-joint engaphumelelanga, umbuzo wokuqala endiwubuzayo ngulowo ugqiba yonke indlela:ingaba ilungu lakha laphumelela uvavanyo lokuxhathisa, okanye lahluleka ekuqaliseni ukusebenza kwalo okokuqala xa lalilinganiswa?Loo mpendulo ichaza ukuba zeziphi iitshekhi ezintlanu ezilandelayo endizenzayo, kwaye ngokulandelelana kwazo. Nantsi indlela endisebenza ngayo kwifowuni okanye ividiyo - ayilotemplate eqhelekileyo, yindlela ubungqina obuhlala bubonakala ngayo.
Ukuba ijoyini ayiphumelelanga ekuqaliseni umsebenzi:Ndiqala nge-powder batch. Phantse kwi-4 kuzo zonke iintsuku ezili-10 zokuqalisa, ndibona ukusilela okuncinci ukuya kumswakama okungekho mntu ubambe ngosuku lokuthulula, kwaye yeyona nto ikhawulezayo ukuqinisekisa okanye ukungavumeli - imizuzu emihlanu kwifowuni nomphathi wesiza kunye novavanyo olukhawulezileyo lwe-desiccant kwikhatriji yesampulu kundixelela ukuba ingaba yonke i-batch kufuneka ivalelwe yodwa na. Ukuba i-powder iyaphela, ndisiya kwi-mold log ndize ndilinganise i-sculpt mold ngokuthelekisa ubunzima bayo bokuqala. Ukuba zombini ziyaphela, ndisika i-joint enye kwi-bandsaw ndize ndijonge i-cross-section - imizuzu emihlanu yomsebenzi osombulula amanye ama-30% amatyala phakathi kwezizathu ezine ezisele. Kuphando lwaseCebu, le yindlela esithathe ukusuka "kwi-200 joints failure" ukuya "kwi-scult shipping yonke imanzi" ngaphakathi kweeyure ezimbini zokuhamba nomthengi kuluhlu lokuhlola kwi-WhatsApp.
Ukuba iqela elidibeneyo liphumelele ukugunyaziswa kodwa ngoku liyasilela ekusebenzeni:Ndiyayitsiba ngokupheleleyo inkqubo yokujonga umgubo ndize ndiye ngqo kwindawo enqamlezileyo kwisampuli efunyenweyo. Ijoyinti ephumelele ukusebenza phantse isoloko inesiphene sayo kwicala lomqhubi kunokuba ibe kwisinyithi esitshixiweyo, kwaye indawo enqamlezileyo indixelela ukuba ngaba yimpazamo yokulungiselela umqhubi weCause 4 engakhange iphumelele uvavanyo lokuxhathisa, okanye ukuguguleka kwesikhunta seCause 2 okushiye intsimbi ingazaliswanga kakuhle kwaye kwavumela ikhemistri yomhlaba ukuba ihlale incinci kangangeminyaka.
Yiyo leyo indlela yokwenyani. Andizijongi zonke ezintlanu zonke iimpazamo kuba i-80% yexesha itshekhi enye okanye ezimbini zisombulula ityala - kwaye umthengi ojonge ingxelo yokwalathisa engaphumelelanga akadingi luluhlu lokuhlola, ufuna ulandelelwano lwemisebenzi.
Ukuba ukusilela kuyasinda kuzo zombini iindlela (umgubo kunye nokungunda kucocekile, kucoceke kwiindawo ezahlukeneyo), ingxaki ngokuqinisekileyo ikwimeko-bume - ikhemistri yomhlaba, imisinga elahlekileyo, okanye ukubola kwe-galvanic ukufumana ujongano olushiywe yi-weld - kwaye incoko kufuneka itshintshe ukusuka kwinkqubo ukuya kuyilo. Loo ngxoxo yinqaku layo.
Ingqeqesho Yokubuyisela Umva: Ukunciphisa Umva, Hayi Ukuyiphinda Iphinde Ibe Yiwelding Endaweni Yayo
Xa ijoyinti isilele, ukulungiswa okuchanekileyo kuphela kukunciphisa umva udlule kwindawo echaphazelekileyo bubushushu uze ulungise kwakhona i-conductor ukususela ekuqaleni. Ukugalela isinyithi esitsha se-weld phezu kwejoyinti esileleyo akusihlanganisi isinyithi esitsha nesesidala ngokuthembekileyo, kuba i-interface yokuqala sele yenze i-metallurgy yayo kwaye nayiphi na i-porosity ebambekileyo iba yindawo ye-nucleation yokusilela okulandelayo. I-cut-back kufuneka ibe yi-50 mm ye-conductor ecocekileyo kwicala ngalinye lejoyinti yokuqala, i-mold entsha kufuneka ibe ngaphakathi kwenani layo lomjikelo, kwaye i-powder batch kufuneka ivele kwi-can evulwe ngokutsha, eqinisekisiweyo neyomileyo.
Ixabiso libalulekile apha, kuba eyona nto ingabizi kakhulu kwijoyinti engasebenziyo kukuyishiya uze unethemba. Ukuphinda uthululwe kubiza isiqingatha sosuku sexesha labasebenzi, umjikelo omtsha wesikhunta, kunye nekhatriji entsha yepowder - izinto ezincinci kuhlahlo-lwabiwo mali lwesitishi esingaphantsi. Ijoyinti engasebenziyo eshiyekileyo isebenza ibiza umakhi umnxeba wewaranti, utyelelo lokuphinda uthululwe, kunye nokulahlekelwa kukuzithemba komthengi kwithenda elandelayo; kwigridi yombane esetyenziswayo kunokuthetha ukutshintshwa kwegridi engaphelelanga kunye neenyanga zokulibaziseka kokuthululwa. Izibalo zihlala zikhetha ukuphinda uthululwe isiqingatha sosuku, kwaye ukuthululwa okwesibini yindawo yendalo yokuphucula isikhunta ukuba ukusilela kubonisa ukuguguleka. Sithumela zethu.ii-molds zokuwelda ezishushunge-log yomjikelo elandelelanayo ukuze abathengi bakwazi ukulandelela imbali yesikhunta ngasinye kwiprojekthi, kwaye loo log inye kufuneka ihambe nayo nayiphi na isikhunta ehamba phakathi kweendawo. Isikhunta ongenakukwazi ukusichaza yisikhunta ongenakusithemba.
| Unobangela | Yintoni ekufuneka uyiqinisekise kwindawo | Ixesha ngelungu ngalinye |
|---|---|---|
| Ukufuma | Uvavanyo lwe-desiccant kwikhatriji yesampulu; uvavanyo lokucima umqhubi; ubushushu bomphezulu wesikhunta ≥ 30 °C | 2 imizuzu |
| Ukuguguleka komngundo | Ilog yomjikelo womngundo; imilo yeentsimbi kuzo zonke iintlanu zokugqibela; ubunzima bomngundo xa kuthelekiswa nobunzima bokuqala | 1 umzuzu |
| Umgubo ongaphantsi | Ubungakanani bekhatriji xa kuthelekiswa neshedyuli yomqhubi; ukujonga ukuthembeka kwebhetshi | 1 umzuzu |
| Ukulungiswa komqhubi | Ukujonga okubonakalayo ngesinyithi esikhanyayo; akukho kudibana kwesikhumba emva kokucoca; ≤ imizuzu eli-15 ifestile evulekileyo | 1 umzuzu |
| Ukutshaya okubandayo | I-infrared okanye i-contact thermometer kwi-mold xa itsha; fudumala ngaphambi kokuba ishushu ukuba ingaphantsi kwama-25 °C | 30 seks |
Indlela Yokuhlola Umthengisi Wakho Wangoku Ngaphandle Kokuthuka Nabani Na
Uninzi lweefowuni endizithathayo ngalo mba aziqali ngokusilela. Ziqala ngomthengi osandula ukucelwa ukuba afanelekele umthengisi omtsha, okanye injineli efumene inkqubo angayiyilanga, kwaye bafuna ukwazi ukuba zeziphi imibuzo ekufuneka bayibuze ngaphambi kokusilela okulandelayo. Inguqulelo enyanisekileyo yaloo ngxoxo kukuba phantse wonke umthengisi unokuthumela isikhunta esisebenza ngemini yokuthulula. Umbuzo onzima kukuba ngaba bangayibhala phantsi isizathu sokuba imveliso yabo isebenze, kwaye ingaba baya kuba nempendulo na xa ingasebenzi.
Imibuzo emithathu yahlula umthengisi wokwenyani kumntu okhupha ixabiso kule ngxaki ithile, kwaye ndingahambahamba kuyo yonke imthengi ngolu hlobo.
- "Ndibonise itemplate yakho yelog yomjikelo wesikhunta."Umthengisi olandela ukubalwa kwemijikelo ngumthengisi owaziyo ukuba iimbotyi ziyaguga. Umthengisi ongayenziyo loo nto ungumntu ombi xa ingxaki yakho iba yeyakhe.
- "Ingaba ingakanani i-powder batch yakho elandelekayo?"Itini nganye kufuneka ibe nenombolo yebhetshi, umhla wokwenziwa kwayo, kunye nesalathisi sesikhongozeli esivaliweyo. Umthengisi ophinda apakishe umgubo omkhulu kwiitini ezingenalebhile usengozini yokufuma kwitini.
- "Uthini umbono wakho ngokutshintshwa kwekhatriji encinci?"Impendulo enyanisekileyo ithi "siyala iodolo ude uqinisekise ubungakanani bomqhubi." Impendulo eyingozi ithi "singathumela itini encinci namhlanje."
Ndiyibukele yonke le mibuzo ibangela ukuba umthengisi angafaneleki ubuncinane kube kanye. Umbuzo 1 uphelise ubudlelwane nenkampani yokurhweba kunyaka ophelileyo - abazange bakwazi ukuvelisa itemplate yelogi yebhayisekile kuba babengazange bayicele kumzi-mveliso wabo, kwaye xa bebuza, umzi-mveliso nawo awukwazanga ukuvelisa. Umbuzo 2 ubambe umsebenzi wokuphinda upakishe ngo-2023: umthengisi wasekhaya wayethenga umgubo omkhulu ngekhilogram aze awuthululele kwii-mini-cans ezingenalo uphawu ukuze zithunyelwe kwamanye amazwe, kungekho nombolo yebhetshi kwii-cans kwaye kungekho salathisi sesikhongozeli esivaliweyo. Sitsale ii-odolo zethu kwiveki enye. Umbuzo 3 ngulowo ndiwucinezela kakhulu, kuba uvavanya ukuba umthengisi uza kukhetha ukuthembeka kwejoyinti yakho kuneshedyuli yakho yokuthenga - kwaye impendulo ikuxelela phantse yonke into ekufuneka uyazi malunga neminyaka emihlanu ezayo yokusebenza nabo.
Sakhe amaxwebhu ethu okuthumela ngaphandle ajikeleze le mibuzo mithathu kuba yimibuzo uphando lwethu lokusilela oluhlala lujikeleza kuyo. Kwakhona yimibuzo ebendinokusibuza yona, ukuba bendingumthengi.
Ukuxilongwa Kokusilela Kwe-Weld — Khetha Uphawu Olubonayo Entsimini
Ngaphambi kokuba usike ilungu elinye, sebenzisa olu xilongo. Khetha uphawu oluhambelana noko ukubonayo kwindawo - umfanekiso, umbane, okanye ipateni yexesha - kwaye isixhobo silubuyisela kwizizathu ezinokwenzeka kwezi zintlanu zingasentla, sikunike ulwazi lokuzithemba, kwaye sidwelise amanyathelo akhawulezileyo omawuwathathe ngaphambi kokuba uqalise kwakhona. Lo ngumthi wesigqibo endiwuthathayo kumthengi ngefowuni xa kufika umnxeba wokungaphumeleli.
Imingxunya okanye imingxuma ebonakalayo kumphezulu weentsimbi
I-bead ibekwe ngaphakathi okanye ibonakala ngathi ayizaliswanga kakuhle embindini
Umgca ocacileyo ubonakala kwindawo enqamlezileyo apho iinxalenye ezimbini zesinyithi zingakwazanga ukudibana khona
I-Weld ibotshelelwe kumqhubi omnye kuphela wesibini se-crossover
I-Bead ibukeka igqibelele, kodwa ukumelana kwayo kuphezulu (ngaphezulu kwe-200 µΩ) xa isetyenziswa
Ukuchasana kwakwamkelekile xa kuqaliswa kodwa kuyenyuka unyaka nonyaka
Ukungaphumeleli kuhlangana kuphela ekuqaleni kotshintsho, kubuye kubuyele esiqhelweni kusasa.
Iqela lokungaphumeleli ekupheleni kwebhetshi yomgubo / ukuthunyelwa okukodwa
Isikhunta sidlule imijikelo engama-50, okanye usifumene njengelifa ngaphandle kwerekhodi yomjikelo
- Qinisekisa ubungakanani bekhatriji ngokuchasene nomxube wekhontraktha — itshaja encinci yeyona nto ixhaphakileyo yokudibanisa okungaphelelanga kwikhontraktha enye.
- Hlola ulungelelwaniso lwesikhunta: ezi ziqingatha zibini mazivale kakuhle kumgca ophakathi wesikhondisi kungekho kukhanya kwelanga kubonakalayo.
- Jonga idiski yesinyithi — kufuneka ihlale embindini phezu komngxuma wempompo ngaphambi kokuba itshiswe, ingaze itshintshe i-off-axis.
- Lungisa kwakhona i-conductor pair ngebrashi entsha kunye ne-isopropyl wipe ngaphambi kokuba uthululwe kwakhona.
- Thatha umfanekiso wejoyinti engasebenziyo kunye nokulungelelaniswa kwayo ngaphambi kokuba idilizwe ukuze kujongwe kwakhona ukuthululwa okulandelayo.
Olu xilongo luchaza uphawu olunye kwisizathu esinye esinokwenzeka kakhulu ngokusekelwe kwiipateni zamacandelo ahlukeneyo ezivela kwiimpazamo ezingama-312 ezibhalwe phantsi eziphandwe ngumzi-mveliso wethu phakathi kowama-2023 nowama-2026. Ukuba iimpawu ezimbini ziyadibana, sebenzisa eyesibini ngokwahlukeneyo - ziya kubonisa unobangela ofanayo kwi-80% yamatyala adibeneyo.
Imibuzo Ebuzwa Rhoqo Malunga Nee-Exothermic Welds Ezingaphumelelanga
Ndingazi njani ukuba i-exothermic weld ayiphumelelanga ukuba isabonakala iqinile?
I-thermit weld engasebenziyo ingabonakala igqibelele ngaphandle kodwa ibe yijoyinti embi. Izalathisi ezithembekileyo zezombane: ukufundwa kokumelana kwe-milliohm okunyuka unyaka nonyaka, umfanekiso wobushushu othathwe phantsi komthwalo obonisa ukuba ijoyinti isebenza ngobushushu ngaphezu kwe-conductor, okanye indandatho ye-copper carbonate eluhlaza kwindawo yokuphuma kwe-conductor. Ukuhlolwa okubonakalayo kukodwa kubamba kuphela ukusilela okubi kakhulu - ukuvuleka okugqobhoze umphezulu okanye ukugcwaliswa okungekhoyo kumngxuma wempompo.
Ngaba i-exothermic weld engaphumelelanga ingaphinda idityaniswe endaweni yayo, okanye ngaba umqhubi kufuneka anqunyulwe?
Kufuneka unqumle umva udlule kwindawo echaphazelekileyo bubushushu kwaye ulungise kwakhona umqhubi omtsha. Ukugalela isinyithi esitsha se-weld phezu kwejoyinti engasebenziyo akusihlanganisi isinyithi esitsha nobhedu oludala ngokuthembekileyo kuba ujongano lokuqala sele lwenze i-metallurgy yalo kwaye nayiphi na i-porosity ebambekileyo iba yindawo ye-nucleation yokusilela okulandelayo. Ngokwenyani, ijoyinti engasebenziyo ithetha ukunciphisa ubuncinci i-50 mm yomqhubi kwicala ngalinye, ukucoca ibe yintsimbi ekhanyayo, kunye nokusebenzisa i-graphite mold entsha - kwaye kuphela emva kokuba uchonge unobangela.
Yintoni eyenziwa ngumswakama ngaphakathi kwe-exothermic weld?
Ubhedu olunyibilikisiweyo oluvela kwi-exothermic reaction luhlala malunga ne-1,083 °C, kwaye nawaphi na amanzi abanjwe kwindawo yokubumba, kwi-conductor, okanye kwi-powder flash-flashes ukuze akhuphe umphunga kwangoko xa isinyithi sifika. Umphunga wanda malunga namaxesha ayi-1,700 ngobuninzi kwaye uphoqeleka ukuba uphume ngesinyithi esinyibilikisiweyo, ushiya imingxunya kunye nejoyinti enemingxuma, ene-oxide-laminated. Kwiimeko ezimbi kakhulu ezibhalwe phantsi, ukuqhuma komphunga kuye kwaphosa isinyithi esinyibilikisiweyo kwi-crucible kunye nezinto ezijikelezileyo ezivuthayo - le yeyona ngxelo ixhaphakileyo ye-OSHA yokulimala kokuvutha kwimisebenzi ye-thermit-weld.
Isikhunta se-graphite exothermic welding sifanele sihlale ixesha elingakanani?
Kumgca wethu silinganisa ii-graphite molds kwimijikelo yenkonzo engama-50 ukuya kwi-100, kunye neejoyinti ezingama-80 ukuya kwi-100 xa zisetyenziswa ngendlela eqhelekileyo, kuba ukugalela ngakunye kuyawutshabalalisa umngxuma kwaye kuyawukhulisa kancinci umngxuma wompompo. I-mold etyhalelwe ngaphaya kwenani layo lomjikelo iqala ukuvelisa iijoyinti ezingazaliswanga ngokwaneleyo, kwaye abaqhubi bayayilungisa ngokongeza umgubo - otshisa umngxuma kwaye ukhawulezise ukuguguleka. Isignali ethembekileyo ayisiyonto iqhekekileyo onokuyibona; yi-weld bead elahlekelwa yimo yayo yomqamelo kwaye iqala ukuyifaka ngaphakathi.
Kutheni i-exothermic weld yam ibonakala ilungile kodwa ilinganisa ukumelana okuphezulu xa isetyenziswa?
Ukumelana okuphezulu kwi-weld ebonakala ilungile phantse rhoqo kubuyela kwenye yezinto ezintathu: umqhubi akazange acocwe kwisinyithi esikhanyayo phantsi komngxuma we-weld, i-powder charge yayingaphantsi kobukhulu be-conductor cross-section, okanye i-mold yayingalungelelaniswanga kakuhle ukuze isinyithi esinyibilikisiweyo sidityaniswe kwii-conductors endaweni yokudibana kuzo zombini. I-weld elungileyo kunye ne-weld engaxhathisi kakhulu azifani ngokuzenzekelayo, kuba umlinganiselo wokumelana uthathwa kwi-joint, kungekhona nge-bead. Sibone amalungu anee-beads ezintle zilinganisa i-800 micro-ohm ngokuchasene ne-30 ukuya kwi-50 micro-ohm ephilileyo kubamelwane abafanayo.
Yintoni umahluko phakathi kokusilela kwe-weld exothermic kunye ne-weld engasebenzi kakuhle kwasekuqaleni?
Ukusilela kwe-weld exothermic yijoyinti esebenza ngokuchanekileyo xa kufakelwa ize yonakale xa isebenza — ngesiqhelo ngokugqwala kwindawo yomqhubi, i-weld ayizange ifikelele kuyo, ngokujikeleza kobushushu okuvula i-micro-gap, okanye ngokuphazamiseka koomatshini. I-weld enesiphene ayizange ilunge: yayigalelwa ngomgubo omanzi, isithuba esikhulu, isikhunta esigugileyo, okanye i-conductor engcolileyo, kwaye ukusilela kubonakala xa kuqaliswa okanye kuvavanyo lokuqala lomthwalo. Ukwahlula ezi zinto zimbini kuba ukusilela kudla ngokukhomba ingxaki yokusingqongileyo, ngelixa ukusilela kubonisa ingxaki yenkqubo okanye yomthengisi.
UJane Yang· Umphathi weNtengiso, iXinchang Shibang New Material Co., Ltd.
Iminyaka eli-12 yokukhusela umbane kunye nokumisa urhwebo lwangaphandle · Iminyaka eli-17 yokuvelisa ifektri emva kwayo yonke ingcebiso.
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Ixesha lokuthumela: Agasti-31-2026