Lub taub hau txias (nias) ntawm cov khoom fastener yog ua tiav los ntawm presses thiab tsis siv neeg txias taub hau tshuab. Ntawm ntau hom kab mob khaub thuas, xws li kev sib tw txias txias, ib qho - chaw nres tsheb, thiab ntau- chaw nres tsheb txias taub hau, cov duab ntawm semi- cov khoom tiav los ntawm cov txheej txheem dhau los lossis chaw nres tsheb ncaj qha cuam tshuam rau kev tsim cov txheej txheem tom ntej lossis chaw nres tsheb. Yog li ntawd, kev txiav txim siab qhov tseeb deformation zoo raws li qhov tsim nyog faib ntawm deformation piv muaj qhov cuam tshuam ncaj qha rau cov deformations tom ntej thiab cov khoom zoo.
1. Txias taub hau (nias) txheej txheem rau pas nrig- zoo li tus fasteners
Rau lub taub hau txias (nias) txheej txheem ntawm pas nrig -zoo li tus fasteners, cov tsis muaj feem cuam tshuam ntawm txhua tus txheej txheem (chaw nres tsheb) yuav tsum tau txiav txim siab. Lub ntsiab tsis muaj xws li cov nqe lus piv txwv, qhov twg Lo thiab ua sawv cev rau qhov ntev thiab thawj txoj kab uas hla ntawm lub taub hau ib feem ntawm qhov dawb paug, feem; D thiab H qhia txog txoj kab uas hla thiab qhov siab ntawm lub workpiece tom qab nqes mus, feem.
Lo/do yog ib qho kev ntsuas ntawm qhov ntev ntawm qhov ruaj khov ntawm qhov khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob Qhov me dua tus nqi ntawm Lo / ua, qhov zoo dua nws yog rau lub taub hau rau kev ntxhov siab thiab forging; thaum tus nqi ntawm Lo / ua yog loj heev, longitudinal dabtsi yog khoov tshwm sim nyob rau hauv lub upsetting thiab forging ib feem ntawm qhov dawb paug. Ntxiv nrog rau tus nqi ntawm Lo / ua, muaj lwm yam uas cuam tshuam rau longitudinal stability ntawm qhov dawb paug upsetting deformation. Txawm hais tias nws yog lub tshuab txias txias tsis siv neeg lossis lub tshuab txiav, txawm tias nws yog lub tshuab txiav los yog lub tes tsho txiav, qhov txiav ntawm qhov khoob tsis tuaj yeem ua rau nws qhov axis, thiab yuav tsum muaj qhov inclination ntawm 1℃txog 5 degree. Txoj kev no, thaum lub caij txias txias (nias), thawj qhov cuam tshuam ntawm lub zog ntawm qhov khoob tsis yog nyob hauv nruab nrab, tab sis eccentric, ua rau muaj kev ntxhov siab tsis sib xws ntawm qhov khoob, ua rau tsis sib xws thiab ua rau folding vim longitudinal dabtsi yog khoov thaum lub taub hau tsim. Rau blanks nrog ib tug me me inclination lub kaum sab xis ntawm qhov chaw txiav, longitudinal dabtsi yog khoov los ntawm deformation tsis pom tseeb thiab tsis ncav cuag ib theem uas cuam tshuam rau lub taub hau zoo. Nyob rau hauv lub txias upsetting (nias) txheej txheem, npaj ib tug dawb paug shaping kauj ruam tom qab txiav yog tsuas yog rau lub hom phiaj no.
Tsis tas li ntawd, hauv qab kawg ntawm qhov pib punching kab noj hniav yog qhov chaw kis tau tus mob rau kev siv lub zog siab rau qhov khoob. Yog tias muaj qhov nruab nrab offset, qhov nruab nrab ntawm qhov tshwm sim ntawm lub zog yuav inevitably yuav offset, uas kuj yog ib qho tseem ceeb cuam tshuam rau qhov tshwm sim ntawm longitudinal dabtsi yog khoov. Kev siv lub caij nplooj ntoos hlav-loaded ejector tus pin nyob rau hauv thawj zaug xuas nrig ntaus tuaj yeem txo cov nyhuv no. Lwm yam tseem ceeb xws li kev ua haujlwm raug ntawm lub tshuab cuab yeej thiab tus neeg teb xov tooj theem ntawm kev hloov kho rau cov cuab yeej kev teeb tsa kuj muaj kev cuam tshuam rau kev pib xuas nrig ntaus.
Txhawm rau txhim kho qhov ruaj khov ntawm qhov khoob thaum lub sij hawm pib stamping deformation, tshwj xeeb tshaj yog rau cov qib steel nrog cov tsis zoo severability xws li cov pa roj carbon tsawg, cov kab noj hniav cylindrical nrog qhov siab ntawm 1.5 mus rau 2 hli yuav tsum tau ntxiv rau qhov me me kawg ua hauj lwm kab noj hniav ntawm thawj stamping, ntxiv rau cov duab conical.
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