Stretch forming processing yog ib txoj kev ua stamping uas siv cov pwm los ua ib lub tiaj tiaj rau hauv qhov qhib qhov khoob.Raws li ib qho ntawm cov txheej txheem tseem ceeb stamping, ncab yog siv dav.Cov txheej txheem ncab tuaj yeem siv los ua cylindrical, rectangular, stepped, spherical, conical, parabolic thiab lwm yam tsis zoo li cov phab ntsa.Yog tias nws ua ke nrog lwm cov txheej txheem stamping, nws tuaj yeem tsim cov khoom nrog ntau cov duab..

Siv cov khoom siv stamping rau stretch forming processing ntawm cov khoom, xws li: stretch processing, re-stretch processing, thim rov qab stretch thiab thinning stretch processing, thiab lwm yam. Stretching processing: Siv lub pressing phaj ntaus ntawv siv lub punching quab yuam ntawm cov punch mus rub ib feem los yog tag nrho. ntawm cov khoom tiaj tus mus rau hauv kab noj hniav ntawm lub concave pwm los ua nws rau hauv ib lub thawv nrog rau hauv qab.Kev ua haujlwm ntawm sab phab ntsa ntawm lub thawv sib npaug mus rau qhov kev taw qhia ncab yog kev ua kom huv si, thaum lub sijhawm ua haujlwm ntawm cov thawv ntim conical (los yog pyramid) zoo li lub thawv, hemispherical ntim, thiab cov thawv ntim khoom parabolic kuj suav nrog kev nthuav dav.

Re-stretch processing: uas yog, rau cov khoom sib sib zog nqus uas tsis tuaj yeem ua tiav hauv ib txoj kev ncab, nws yog ib qho tsim nyog yuav tsum ncab cov khoom tsim tom qab stretch ua kom qhov tob ntawm lub thawv tsim.

Reverse stretch processing: Rov qab stretched stretched workpiece nyob rau hauv cov txheej txheem dhau los, sab hauv ntawm lub workpiece ua rau sab nrauv, thiab cov txheej txheem ntawm kev ua cov txheej txheem me me yog thinner.Nyob rau hauv kab noj hniav ntawm concave pwm nrog ib tug me ntsis me me txoj kab uas hla, lub sab nraud txoj kab uas hla ntawm lub thawv nrog rau hauv qab yog txo, thiab phab ntsa thickness yog thinned nyob rau tib lub sij hawm, uas tsis tsuas yog tshem tawm qhov sib txawv ntawm phab ntsa thickness, tab sis kuj. ua kom lub ntsej muag ntawm lub thawv du.

Cov hauv qab no qhia ob hom hlau stamping thiab ncab thaum siv cov khoom siv stamping:

1. Cylindrical drawing processing + (Round drawing): stretching ntawm cylindrical khoom.Ob lub flange thiab hauv qab yog nyob rau hauv ib lub dav hlau zoo li, sab phab ntsa ntawm lub tog raj kheej yog axisymmetric, thiab deformation yog sib npaug zos rau tib lub voj voog, thiab cov plaub hau ntawm flange raug puas tsuaj los ua kom sib sib zog nqus nqus deformation.

2. Ellipse drawing processing + (Ellipse drawing): Lub deformation ntawm cov plaub hau ntawm flange yog tensile deformation, tab sis tus deformation npaum li cas thiab deformation ratio hloov correspondingly raws lub contour duab.Qhov loj dua qhov curvature, qhov ntau dua cov yas deformation ntawm cov ntaub plaub, thiab qhov sib txawv, qhov me ntawm curvature, qhov me me ntawm cov yas deformation ntawm cov ntaub plaub.