Ekugxivizeni kwensimbi yeshidi, ubuhlalu buyisici esibalulekile ekulawuleni ukungena kweshidi lensimbi ukuze kwakhiwe amaphaneli amakhulu.Izifundo eziningi zigxile ekwakhiweni kobuhlalu obubodwa, obuhlinzeka ngokubophezela okulinganiselwe;izifundo ezimbalwa kuphela ezifake ubuhlalu bokudonsa obuningi noma amanye amajiyometri.” Ukudweba Izingqinamba Zobuhlalu Be-Weld Ekudwebeni Ukusebenza Kwe-Sheet Metal Drawing,” indatshana emayelana nomklamo wobuhlalu obubodwa eshicilelwe Nov/Dec.STAMPING Journal 2020, ichaza ukuthi ukubopha kungakhushulwa kokunye. ububanzi ngokwandisa ukujula kokungena kobuhlalu besilisa nokwenza irediyasi yobuhlalu iqonde kakhulu.
Irediyasi ebukhali ikhulisa ukuwohloka kwensimbi yeshidi njengoba igoba/iqondisa ngesinyathelo ngasinye, kuyilapho igeleza ku-drawbead.Okwezinto ezisetshenziswayo ezine-ductility elinganiselwe, njengama-alloys e-aluminium nezinsimbi ezithuthukisiwe ezinamandla aphezulu, ezinciphisa izinga lokuguquguquka ngokugoba ngakunye/ umjikelezo ongagobi ngokusebenzisa i-weld bead radii enkulu ingasiza ekuvimbeleni ukuqhekeka kwensimbi yeshidi.Kunokuba wenze le radii ibe bukhali, ukuvimbela kunganyuswa ngokwandisa inani lezinyathelo zokugoba/ukuqondisa (bona Umfanekiso 1).
Injongo yalolu cwaningo bekuwukwethula idizayini eyingxube yobuhlalu obubodwa/okabili-okabili futhi ihlaziye ukusebenza kwalokhu kumisa ngokwamandla ako okubopha afinyeleleka. kunobuhlalu obubodwa obulungisekayo.Lokhu kubangela amandla aphakeme abophezelayo okungena kobuhlalu obufanayo noma ikhono lokunciphisa ukungena kobuhlalu ukuze kuncishiswe ukuwohloka kweshidi.
Izibonelo ze-Aluminium AA6014-T4 zahlolwa ukuze kutholakale ukuthi ukungena kobuhlalu obuphakathi nendawo kanye negebe phakathi kwe-adhesive kuthinta amandla okubopha.Amasampula okuhlola asetshenziselwa lolu cwaningo ayengu-51 ± 0.3 mm ububanzi, 600 mm ubude, futhi 0.902 ± 0.003 mm ubukhulu. Hlanza futhi gcoba ngendlela efanele amasampula eshidi nezinto ezifakwayo nge-61AUS Grinding Oil.Okufakwayo kwe-Drawbead kwenziwa ngomshini ngensimbi yensimbi ye-D2 kanye nokushisa kufakwa ku-HRC 62.
Umfanekiso wesi-2 ubonisa izingxenye zobuhlalu obuphindwe kabili obulungisekayo obusetshenziswe kulolu cwaningo.Isifanisi se-drawbead efanayo kanye nesistimu yesilinda esisebenza nge-hydraulic sisetshenziswe ocwaningweni okukhulunywe ngalo esihlokweni sangaphambilini, esiveza ukwakheka kwesistimu ngokuningiliziwe.Wonke ukuhlanganiswa kwesifanisi se-drawbead kugingqiwe. etafuleni lensimbi ngaphakathi kohlaka lomshini wokuhlola oqinile we-Instron, kanye nezinto ezilungisekayo ezinobuhlalu obukabili zifakwa kusifanisi se-drawbead.
Ngesikhathi sokuhlolwa, kwasetshenziswa amandla okubamba angaguquki angu-34.2 kN ukuze kugcinwe igebe phakathi kwezingxenye ezingaphezulu neziphansi ze-drawbead lapho ishidi lidonswa phezu kobuhlalu obudonswayo. kunobukhulu beshidi, futhi ilungiswa ngesethi ye-shim.
Inqubo yokuhlola iyafana naleyo esetshenziswe ekuhlolweni kobuhlalu obubodwa obuchazwe esihlokweni esandulele.Sebenzisa isikhala esilinganisiwe ukuze udale igebe olifisayo phakathi kwama-blade futhi usebenzise igeji yokuzwa ukuze uqinisekise ukunemba kwegebe.Isibambeli esingenhla se-tensile izinto zokuhlola zibopha ingxenye engenhla yeshidi, kuyilapho ingxenye engezansi yomugqa iboshelwe phakathi kwezinto ezifakiwe.
Amamodeli ezinombolo okuhlolwa kwe-drawbead athuthukiswa kusetshenziswa isofthiwe ye-Autoform.Uhlelo lusebenzisa indlela yokuhlanganisa engacacile ukuze ilingise ukwenza imisebenzi, okuvumela ukuguqulwa okulula kwemodeli yokulingisa ngaphandle kokuphazamisa kakhulu isikhathi sokubala.Le nqubo yenza kube lula ukuzama kwesikhunta futhi ibonise ukuhlobana okuhle nemiphumela yokuhlola.Imininingwane yemodeli yezinombolo inikezwe esihlokweni esandulele.
Ukuhlolwa kwenziwa ukuze kutholwe umthelela wokungena kobuhlalu obumaphakathi ekusebenzeni kwesistimu yobuhlalu obudwetshiwe.Ihlolwe ngokungena kwephasi emaphakathi engu-6mm, 10mm, 13mm futhi ayikho iphasi emaphakathi kuyilapho kugcinwa igebe phakathi kokufakwayo ne-lath liku-10% wogqinsi lwesifanekiso sokuhlola. Ukuhlolwa okuthathu kwenziwa ekucushweni ngakunye kwejiyomethri ukuze kuqinisekiswe imiphumela engaguquki.
Umfanekiso wesi-3 ubonisa ukuphindaphinda kwemiphumela yokuhlola yokungena kobuhlalu obungu-6 mm kumasampula amathathu, ngokuchezuka okujwayelekile okujwayelekile okungu-0.33% (20 N).
Umfanekiso 1. Kumklamo we-hybrid wokudonsa ubuhlalu, ukungena okulungisekayo kobuhlalu kunikeza ukuzithika okukhulu.Ukuhoxisa ubuhlalu kuguqula lobu buhlalu bokudonsa bube ukucushwa kwendabuko kobuhlalu obubodwa.
Umfanekiso wesi-4 uqhathanisa imiphumela yokuhlola (abukho ubuhlalu obumaphakathi kanye no-6, 10 kanye no-13 mm ukungena) nemiphumela yokulingisa.Ijika ngalinye lokuhlola limelela incazelo yokuhlolwa okuthathu.Kungabonakala ukuthi kukhona ukuhlobana okuhle phakathi kwemiphumela yokuhlola neyokulingisa. , ngomehluko omaphakathi emiphumeleni engaba ngu-±1.8%.Imiphumela yokuhlolwa ibonisa ngokusobala ukuthi ukwanda kokungena kobuhlalu kuholela ekwenyukeni kwamandla okubopha.
Ukwengeza, umphumela wegebe emandleni okuvimbela wahlaziywa ukuze kucushwe ubuhlalu obuphindwe kabili be-aluminium AA6014-T4 enobude obuphakathi be-bead obungu-6 mm. Le sethi yokuhlola yenzelwe izikhala ze-5%, 10%, 15% kanye no-20% we-specimen ukujiya.Igebe liyagcinwa phakathi kwe-flange yokufaka kanye ne-specimen.Imiphumela yokuhlola neyokulingisa ku-Fig. 5 ibonisa ukuthambekela okufanayo: ukukhulisa igebe kungase kuholele ekuncishisweni okuphawulekayo kokuvinjelwa kwe-drawbead.
I-friction coefficient engu-0.14 yakhethwa ubunjiniyela obuhlanekezelwe.Imodeli yezinombolo yesistimu yobuhlalu obudonsayo yabe isisetshenziswa ukuze kuqondwe umphumela wegebe phakathi kweshidi ne-flange ku-10%, 15% kanye no-20% wezikhala zokujiya kweshidi.Ngo-5 % igebe, umehluko phakathi kwemiphumela elingisiwe kanye neyokuhlola ingu-10.5%;ezikhaleni ezinkudlwana, umehluko mncane.Sekukonke, lokhu kwehluka phakathi kokulingisa nokuhlola kungase kubangelwe ukuwohloka kwe-shear yokuqina, okungenzeka kungathwetshulwa imodeli yezinombolo ekwakhekeni kwegobolondo.
Umthelela wegebe elingenabo ubuhlalu obumaphakathi (ubuhlalu obubodwa obubanzi) ekubopheni kwaphenywa futhi.Leli sethi yokuhlola lenzelwa izikhala ezingu-5%, 10%, 15% kanye no-20% wobukhulu beshidi.Umfanekiso 6 uqhathanisa imiphumela yokuhlola neyokulingisa, ebonisa ukuhlobana okuhle.
Lolu cwaningo lubonise ukuthi ukwethulwa kobuhlalu obuphakathi kwakwazi ukuguqula amandla okubopha ngesici esingaphezu kuka-2.Ku-billet ye-aluminium AA6014-T4, inkambiso yaqashelwa ukwehlisa amandla okubamba njengoba igebe le-flange livuleka. imodeli yezinombolo ethuthukisiwe yokugeleza kwensimbi yeshidi phakathi kwezindawo ezidonsa ubuhlalu ibonisa ukuhlobana okuhle okuphelele nemiphumela yokuhlola futhi ingenza inqubo yokuzama ibe lula.
Ababhali bangathanda ukubonga uDkt. Dajun Zhou waseStellantis ngezeluleko zakhe ezibalulekile kanye nengxoxo ewusizo yemiphumela yephrojekthi.
I-STAMPING Journal ukuphela kwejenali yemboni ezinikele ekuhlinzekeni izidingo zemakethe yokugxiviza izitembu zensimbi.Kusukela ngo-1989, ukushicilelwa bekulokhu kuhlanganisa ubuchwepheshe obusezingeni eliphezulu, amathrendi embonini, izinqubo ezingcono kakhulu kanye nezindaba zokusiza ochwepheshe bokugxiviza baqhube ibhizinisi labo ngempumelelo.
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Isikhathi sokuthumela: May-23-2022