Sihlabe umxhwele umbala. Umsebenzisi we-Reddit 'bcmanucd' usanda kwabelana ngenqubo yakhe ngokuthrendayo /r/DIY i-subreddit yokudalela umkakhe ibhayisikili lesivivinyo sesikhathi esebenzisa isitolo sobunjiniyela sasenyuvesi yakhe. Yize kungacaci ukuthi isizinda sakhe sobunjiniyela siyini, into eyodwa eqinisekile: i-dude ingakha ibhayisikili elihle elihehayo!
Lapha wabelana ngenqubo yakhe:
Ngo-2009, umkami (intombi yangaleso sikhathi) wayegijima eqenjini lamabhayisikili ekolishi lethu, futhi wayedinga ibhayisikili lokuzama isikhathi ukuze aqhudelane emiqhudelwaneni kazwelonke. Ngangiqeda ithisisi yenkosi yami, futhi akekho kithi owayenemali eningi, kodwa nganginesikhathi esiningi samahhala kanye nokufinyelela ekolishi lesitolo semishini yobunjiniyela.
Angizange ngigculiseke ngamabhayisikili e-TT esabelomali esilinganiselwe sosuku, ngakho-ke ngizinikele ukumklama nokumakhela ibhayisikili. Kube yinqubo ende, ehilelekile, kodwa ngafunda okuningi kuyo, futhi kwamsiza ukuthi awine umqhudelwano kazwelonke wokuvivinywa kweqembu labesifazane ngalowo nyaka.
Ijiyomethri yayisekelwe ekuhlolweni kokufaneleka okuvela kumqeqeshi wakhe. Isikhundla sinolaka kakhulu, futhi sidinga ubude beshubhu lekhanda elingu-85 mm kuhlanganise ne-headset. Ngadweba umdwebo wohlaka ku-Autodesk Inventor, ngase nginamathisela umhlangano wamashubhu amodela emdwebeni.
Imodeli ku-Inventor yayibalulekile ekuthuthukisweni komklamo, njengoba ingivumele ukuba ngihlaziye izindaba zokugunyazwa (okungukuthi, ukuvunyelwa kwe-crank kanye ne-chainring nge-chainstays). Ngikwazile futhi ukusebenzisa amaphrofayili e-tubing ukudala izinhlelo ze-NC zokuhlanganisa amashubhu kanye nokugaya abashiya phansi kanye neshubhu yekhanda, isibonelo.
Ngikhethe ukusebenzisa i-7005 aluminium alloy, njengoba bekungeke kudinge ukwelashwa kokushisa kwesixazululo. Abahlinzeki bami bekuyi-Nova Cycles yase-Rocklin, CA kanye ne-Fairing Industrial yase-Chino, CA. Ishubhu ngalinye libe nengxenye ehlukile yesiphambano, ngakho ngasebenzisa umshini wokulinganisa we-Mitutoyo (CMM) ukuze ngilinganise ubujamo beshubhu. Leli ishubhu eliphansi. I-CMM irekhode izixhumanisi zika-x kanye no-y endaweni kuyo yonke imilimitha, futhi ngikwazile ukungenisa le datha ku-Inventor.
Ngenze okuningi komshini wami kumshini wokugaywa oqondile we-Bridgeport onezilawuli ze-CNC ezixubile.
Bengifuna ukuthi ishubhu lekhanda libe mfushane (ngokulingana) futhi libe mncane (ukunciphisa indawo engaphambili). Ngiklame ishubhu lekhanda ukuze lamukele ihedisethi ehlanganisiwe kanye neshubhu lokuqondisa elingu-1″. Lokhu kwenze ukuthi ububanzi bufike ku-42 mm emaphethelweni. ngokugaywa kwendawo okuyinkimbinkimbi ngehlise ububanzi baba ngu-35 mm phakathi.
Ishubhu lekhanda ngemuva kokugaya indawo. Ngibophele ishubhu lekhanda endaweni yokushisela, ngaligcina lapho ngenqubo yokushisela ukuze ngigcine ukuma.
Qaphela ukuthi ishubhu yekhanda inciphile ezinhlangothini nangemuva, kodwa i-convex ngaphambili ukuze kwandiswe ubude be-chord bokuhlangana kweshubhu lekhanda.
Angikwazanga ukuthola i-head tube reamer yehedisethi engu-1″ ehlanganisiwe, ngakho-ke ngenze lokhu kufakwa kabusha kwe-VAR ku-headset remer & facer. Ngasebenzisa insimbi engu-4140 futhi kwadingeka ngiphendukele ekugcwaliseni ngesandla ukuze ama-reliefs ngithole izindawo zokusika ezinhle.
Akekho owenza ukuyeka okuvundlile ngeziphanyeko ze-derailleur ngo-7005, ngakho nami ngizifake ngomshini.
Ukuyeka ngakunye kwakudinga izinhlelo ezi-4 ezihlukene ze-NC endaweni yokugaya. Uyabona ngisebenzise i-welding fixture yami ukuze ngibambe lapha futhi.
Ukucofa isiphanyeko se-derailleur. Ngabheka izincwadi zikaShimano ukuze ngithole indawo ekahle yokubeka imbobo yebhawodi le-hanger.
Abaphumayo abaqediwe
Abaphumayo, babhekwa phambili. Ngenze amapulaki ngomshini ukuze alingane phakathi kwezindawo zokuhlala ukuze ngisize ekulungiseni uhlaka. Amakhona ayefakwe isihlabathi ngamashubhu kamuva.
Ama- dropout anezikulufu ezibekiwe ezifakiwe. Lokhu kuvumela indlela elula yokulungisa isikhala sesondo elingemuva ngemuva kweshubhu yesihlalo. Qaphela ukuvela kwe-knurling ekuphumeni kwesokudla - ngibambe abashiyayo esondo elingemuva ukuze ngenze umfanekiso wefreyimu ukuze ngihlole ukucaca kwebhuleki elingemuva kanye nomzila wekhebula.
Ukuhlanganisa i-tube ephezulu. Ngisebenzise i-FeatureCAM ukuze ngibhale izinhlelo ze-NC zama-tube miter ngokusekelwe kumafayela ezingxenye ze-Inventor angenisiwe. Izinsimbi ezibambe amashubhu anodonga oluncane ziphinde zasikwa ezinhlelweni ze-FeatureCAM ngokusekelwe kumaphrofayili eshubhu asuka ku-CMM.
Isakhiwo se-Welding. Ngakha amabhulokhi amaningana ukuze ngibambe abaphumayo, igobolondo labakaki abaphansi, ishubhu lekhanda, namashubhu amakhulu, futhi ngawabophela etafuleni lokubona.
Ngiphinde ngaphrinta uhlaka lomdwebo ngesikali esingu-1:1. Lokhu kwaba usizo kakhulu ekwendlaleni i-fixture etafuleni.
Izinsimbi zamashubhu ezisetshenziselwa ukuhlanganisa nazo ziphindeke kabili njengezinto zokushisela.
Ibhulokhi yemidlalo yabayekayo. Amapulaki ezindawo zokuhlala abengukhiye ekulungiseni uhlaka.
Ingxenye yobakaki engezansi, ihlangana ndawonye. Kwadingeka ngenze ikhophi yesondo elingemuva, ifreyimu, kanye nebhuleki langemuva ukuze ngithole ukuthi imbobo engakanani yembobo eshubhuni eliphansi ukuze izintambo ziphume. Lokhu kudinga ukusikeka okuphindaphindiwe okuphindaphindiwe kwelunga eliphansi leshubhu.
Leli bhuloho le-chainstay liphinde lasebenza njengendawo yokukhuphuka yebhuleki elingemuva. Ngashintsha isitudi sokukhweza ku-Oval Concepts aero brake ngebhawudi, futhi ngaxhuma imbobo epuletini. Ngizungezisa ishubhu lesihlalo ukuze lesi sithombe sifanekise uhlangothi olungaphezulu lwepuleti - qaphela ubambo oluqinisa imbobo yebhawodi.
Abakaki abaphansi abaneshubhu yokuhlala, ipuleti lebhuloho, kanye ne-chainstay eyodwa endaweni. Lokhu kuzoba yisifunda esinzima kakhulu ukushisela ngokusekelwe ekufinyeleleni okungelula.
I-head tube junction. Ngakhipha imigqa yekhonta eshubhuni lekhanda kamuva, okwasiza ngokulingana. Qaphela imbobo eshubhuni eliphezulu eduze konqenqema lweshubhu eliya phansi. Nginqume izimbobo eshubhuni eliphezulu ukuze ngihambise izintambo ngohlaka, ngingene ngemuva kwesiqu. Ngifake ingxenye engasetshenzisiwe yendawo yokuhlala eshubhuni eliphezulu ukuze ngiqinise lezi zimbobo.
Ukusethwa kokushisela: izinsimbi, i-vise, ifayela, ibhulashi locingo, izintambo zokusika, induku yokushisela engu-5356, amagilavu esikhumba, ihood ezenza kube mnyama ngokuzenzakalelayo, nejakhethi. Ngoniwe ngeMiller Synchrowave 350LX.
Nansi enye yezingcezu zami zokuhlola ukushisela. Ama-weld ayengemahle ngaso sonke isikhathi (kwesokudla), kodwa ngazibonakalisa kimi ukuthi anamandla, futhi ahlanza kahle (kwesokunxele).
Ngachitha izinsuku eziningi ngizijwayeza ukushisela i-aluminium njengoba ngangishisela ibhayisikili.
Ngemva kokuphothulwa kokushisela (kanye nosuku kuhhavini), ngaqala inqubo ende yokuhlanganisa amalunga nokuwakha ngesigcwalisi somzimba we-Bondo. Kwakushiwo ibhayisikili elihamba ngendiza, hhayi ibhayisikili elilula, kodwa isamba sesisindo sohlaka ngaphambi kopende sasingu-2.75 lb.
Kuthathe izicelo eziningi ze-Bondo ukuthola izibopho ezamukelekayo.
Ibhayisikili, lihlanganiswe ngokugcwele (susa amasondo). Ngemva kwe-Bondo kwafika ungqimba lwe-primer yokuzikhandla, kodwa inqubo yokudweba yayiphazanyiswa ngezimpelasonto. Ngaleso sikhathi wayeseyidinga emijahweni!
Ibhayisikili ngemuva. Qaphela ibhuleki elingemuva, isigxivizo sesihlalo sesitayela se-wedge, kanye nomzila wekhebula ohlanzekile.
Ama-fillet namanje awaphelele, kodwa yilapho i-primer egcwele kakhulu yangena khona kamuva.
Nasi isithombe sendawo yobakaki engezansi. ungabona ukubekwa kwebhuleki elingemuva kungcono kancane. Ukulungiswa kwamaphedi akulula njengoba kufakwe ama-crank, kodwa lokhu bekungelona ibhayisikili elilula.
Umkami umodela ibhayisikili. Nasi leso sikhundla esinolaka ebengikhuluma ngaso.
Bheka lokho kumamatheka. ngicabanga ukuthi uyayithanda!
Emuva ekudwebeni. Ngiqale kabusha ngezendlalelo ezimbalwa ze-high-fill primer (okunehlabathi elithambile phakathi), ijazi langaphezulu elimhlophe, ukufiphala okuluhlaza okwenziwe nge-airbrush, kanye nezingqimba ezimbalwa zejazi elicacile ukuze izinto zicwebezele. Sibe sesisika imaski ephepheni le-Contac (iphethini elihle lezinhlamvu zokhuni).
Isinyathelo sokugcina kwakuyizingqimba ezimbalwa zoqweqwe olumnyama oluyisicaba ukuze luhlale isikhathi eside. Ngisebenzise opende bezimoto be-Dupli-Color kulo lonke, njengoba bengingagculisekile ngamathini ajwayelekile esitolo sehadiwe ngokuhamba kwesikhathi.
Qaphela amamaski enziwe ekhaya ngaphansi kopende. Igoli bekuyizinhlamvu ezicwebezelayo ezimhlophe ngokuluhlaza okwesibhakabhaka kungemuva elimnyama eliyisicaba.
Sekukonke, ngijabule kakhulu ngemiphumela.
Njengoba eshilo esingenisweni,”…kumsize ukuthi awine umqhudelwano kazwelonke wokuvivinywa kweqembu labesifazane ngalowo nyaka“……Uma lolu akulona uthando lweqiniso, angazi-ke ukuthi luyini.
