Sarrafa ƙaddamarwa hanya ce ta sarrafa tambari wacce ke amfani da mold don samar da faffadan fage zuwa wani ɓangaren buɗaɗɗe.A matsayin daya daga cikin manyan hanyoyin yin hatimi, ana amfani da shimfidawa sosai.Ana iya amfani da tsarin shimfidawa don yin cylindrical, rectangular, stepped, spherical, conical, parabolic da sauran sassan bango marasa siffa.Idan an haɗa shi tare da wasu hanyoyin samar da stamping, kuma yana iya samar da sassan da ƙarin siffofi masu rikitarwa..

Yi amfani da kayan aiki na stamping don ƙaddamar da sarrafa samfuran, gami da: sarrafa kayan miƙewa, sarrafa sake-miƙewa, jujjuyawar juyi da sarrafa madaidaiciya, da sauransu. Gyaran shimfiɗa: Yi amfani da na'urar latsawa don amfani da ƙarfin naushi na naushi don cire sashi ko duka. na lebur abu a cikin rami na concave mold don samar da shi a cikin wani akwati da kasa.Yin aikin bangon gefen kwandon daidai da jagorar mikewa shine aiki mai tsaftataccen mikewa, yayin da aikin shimfidar kwantena masu siffar conical (ko pyramid), kwantena na hemispherical, da kwantena masu kama da juna suma sun hada da aikin fadadawa.

Maimaita aikin sake shimfiɗawa: wato, don samfurori masu zurfi waɗanda ba za a iya kammala su a cikin tsari guda ɗaya ba, wajibi ne a shimfiɗa samfurin da aka kafa bayan aikin shimfidawa don ƙara zurfin kwandon da aka kafa.

Reverse stretch aiki: Juya shimfiɗar aikin da aka shimfiɗa a cikin tsari na baya, gefen ciki na workpiece ya zama gefen waje, kuma aikin yin ƙananan diamita ya fi girma.A cikin rami na concave mold tare da dan kadan karami na waje diamita, da waje diamita na ganga tare da kasa ya rage, da kuma bango kauri ne thinned a lokaci guda, wanda ba kawai ya kawar da sabawa na bango kauri, amma kuma. yana sa saman kwandon santsi.

Mai zuwa yana gabatar da nau'ikan tambarin ƙarfe biyu da shimfiɗawa yayin amfani da kayan hatimi:

1. Silindrical zane sarrafa + (Round zane): mikewa na cylindrical kayayyakin.Dukansu flange da kasa suna cikin siffar jirgin sama, bangon gefen silinda yana da axisymmetric, kuma an rarraba nakasar daidai a kan wannan kewaye, kuma gashi a kan flange ya lalace don haifar da nakasar zane mai zurfi.

2. Ellipse zane sarrafa + (Ellipse zane): Nakasar gashi a kan flange shi ne nakasawa, amma adadin nakasawa da nakasar rabo suna canzawa daidai tare da siffar kwane-kwane.Mafi girma da curvature, mafi girman adadin nakasar filastik na ulu, kuma akasin haka, ƙananan lanƙwasa, ƙananan nakasar filastik na ulu.