Qhov sib txawv tseem ceeb ntawm kev sib txawv ntawm cov khoom sib txawv thiab cov ntawv hlau sib sau yog tias nyob rau hauv ntau qhov deformation, cov khoom ua haujlwm muaj qhov qis qis rau qhov sib piv qhov sib piv, nyob rau hauv cov ntawv hlau tsim, thaj tsam rau qhov sib piv yog siab.
Cov txheej txheem Deformation yog qhov tseem ceeb hauv kev hloov pauv ib qho ntawm cov khoom siv rau hauv lwm cov duab. Feem ntau, qhov pib zoo yog ib qho yooj yim. Peb tuaj yeem deform nws siv cov cuab yeej kom tau raws li qhov xav tau. Ntxiv mus, cov txheej txheem no yog qhov tseem ceeb los ua kom muaj kev siab ntev ntawm cov khoom siv.
Ntau Deformation yog dab tsi?
Bulk deformation yog cov hlau ua haujlwm uas qhov kev hloov pauv tseem ceeb tshwm sim los ntawm cov yas deformation hauv cov khoom siv hlau. Feem ntau, thawj cov duab ntawm cov khoom tuaj yeem yog cylindrical tuav, billets, rectangular billets, slabs, thiab lwm yam. Nyob rau hauv cov txheej txheem no, peb plastically deform cov qauv no nyob rau hauv txias los yog sov / kub tej yam kev mob kom tau cov yam xav tau. Cov txheej txheem ntau deformation yog qhov tseem ceeb hauv kev tsim cov duab nyuaj uas muaj cov khoom siv zoo. Tsis tas li ntawd, nyob rau hauv cov txheej txheem no, peb tuaj yeem soj ntsuam qhov nce ntau hauv qhov sib piv ntawm qhov sib npaug ntawm qhov sib npaug. Peb tuaj yeem sau cov yam ntxwv ntawm kev deformation ntau raws li hauv qab no:
• Cov yas deformation ntawm workpiece yog loj, ua rau ib tug txiav txim siab hloov nyob rau hauv cov duab thiab cross-section
• Feem ntau, qhov ruaj khov elastic deformation loj dua qhov elastic deformation ntawm workpiece.
Cov kauj ruam ua haujlwm ntawm kev deformation ntau yog raws li hauv qab no:
1. Forging - squeezing thiab shaping tus qauv pib ntawm ob tuag
2. Rolling - nyem lub slab r phaj zoo li tus qauv pib ntawm ob rotating yob kom txo qhov siab
3. Extrusion - squeezing thawj cov duab los ntawm ib tug zoo li tus tuag kom cov duab ntawm lub workpiece hloov mus rau hauv cov duab ntawm lub tuag
4. Hlau thiab bar kos duab - hloov cov duab ntawm hlau zoo li thiab bar-zoo li cov qauv
Sheet Metal Forming yog dab tsi?
Daim ntawv hlau sib sau yog cov hlau ua haujlwm uas cov geometry ntawm ib daim ntawv tau hloov kho raws li qhov sib ntxiv ntawm lub zog. Ntawm no, tsis muaj kev tshem tawm cov khoom ua tiav. Tsis tas li ntawd, lub zog thov yuav tsum loj dua qhov kev tawm dag zog ntawm cov hlau. Nws ua rau cov hlau ua rau cov yas deformation. Siv txoj kev no, peb tuaj yeem khoov lossis ncab ib daim hlau rau hauv cov duab uas xav tau.
Daim duab 01: Ua Cov Hlau Hlau
Ntxiv mus, cov txheej txheem no suav nrog plastically deforming ib daim ntawv hlau rau hauv kev teeb tsa 3D nyuaj. Feem ntau, txoj kev no tsis ua rau muaj kev hloov pauv loj hauv cov tuab thiab cov yam ntxwv ntawm daim ntawv. Cov yam ntxwv ntawm txoj kev no yog raws li nram no:
• Workpiece – ib daim ntawv los yog ib feem fabricated los ntawm ib daim ntawv
• Hloov cov duab tab sis tsis yog ntu ntu
• Qee zaum, cov yas deformation ruaj khov thiab elastic deformation yog sib piv. Yog li, elastic rov qab yog qhov tseem ceeb
Dab tsi yog qhov txawv ntawm Cov Khoom Muag Khoom thiab Cov Ntawv Hlau Ua Haujlwm?
Bulk deformation yog cov hlau tsim ua haujlwm uas qhov kev hloov pauv tseem ceeb hauv cov duab tshwm sim los ntawm cov yas deformation hauv cov hlau, thaum cov ntawv hlau sib sau yog cov hlau ua haujlwm uas cov geometry ntawm ib daim ntawv hloov kho raws li qhov sib ntxiv ntawm ib zog. Qhov sib txawv tseem ceeb ntawm kev deformation ntau thiab cov ntawv hlau sib sau yog tias nyob rau hauv ntau deformation, qhov chaw ua hauj lwm muaj qhov chaw qis rau qhov sib piv thaum, nyob rau hauv cov ntawv hlau sib sau, thaj tsam rau qhov sib piv yog siab.
Ntxiv mus, thawj cov duab ntawm lub workpiece tuaj yeem yog billet, pas nrig, slab, thiab lwm yam hauv cov txheej txheem deforming thaum, nyob rau hauv cov txheej txheem hlau ua, cov duab pib yog ib daim ntawv.
Cov ntawv qhia hauv qab no muab cov lus piav qhia ntxiv ntawm qhov sib txawv ntawm cov deformation ntau thiab cov ntawv hlau sib sau.
Summary – Bulk Deformation vs Sheet Metal Forming
Kev deformation ntau thiab cov ntawv hlau ua yog cov txheej txheem deformation tseem ceeb rau cov hlau ua haujlwm. Qhov sib txawv tseem ceeb ntawm kev deformation ntau thiab cov ntawv hlau sib sau yog tias nyob rau hauv ntau deformation, qhov chaw ua hauj lwm muaj thaj tsam tsawg rau qhov sib piv whereas, nyob rau hauv daim ntawv hlau sib sau, thaj tsam rau ntim piv yog siab.
