Thaum tsim cov pwm uas nce zuj zus, qhov siab ntawm lub qhov (blank holder pressure), cov xwm txheej ntawm qhov siab, thiab cov khoom siv raw txhua yam cuam tshuam rau lub peev xwm kom tau txais cov txiaj ntsig ncab tas li yam tsis muaj kev ntsws.
Q: Peb tab tom kos khob los ntawm qib 304 stainless hlau. Ntawm thawj qhov chaw nres ntawm peb lub pwm nce qib, peb kos kom txog li 0.75 nti tob. Thaum kuv xyuas qhov tuab ntawm flange perimeter ntawm qhov dawb paug, qhov sib txawv ntawm ib sab mus rau ib sab tuaj yeem siab txog 0.003 nti. Txhua qhov ntaus yog txawv thiab tsis tshwm sim hauv tib qho chaw. Kuv tau hais tias nws muaj qee yam ua rau cov khoom siv raw, tej zaum ntug sab nraud ntawm lub kauj tseem ceeb. Peb yuav ua li cas thiaj li tau txais lub khob zoo li qub yam tsis muaj wrinkling?
A: Kuv pom koj cov lus nug tsa ob lo lus nug: thawj zaug, cov kev hloov pauv uas koj tau txais hauv cov txheej txheem rho npe, thiab qhov thib ob, cov khoom siv raw thiab lawv cov lus qhia.
Lo lus nug thawj zaug hais txog qhov tsis zoo ntawm kev tsim cov cuab yeej tseem ceeb, yog li cia peb rov xyuas cov hauv paus. Kev hloov pauv ntawm cov qhov tuab thiab kev hloov pauv ntawm cov flanges khob qhia tias tsis muaj cov cuab yeej tsis txaus hauv koj qhov chaw kos duab pwm. Yog tsis pom koj tus qauv tsim pwm, kuv yuav tsum xav tias koj qhov punch kos thiab lub voj voog pwm thiab lawv cov qhov sib txawv ua tau raws li txhua tus qauv tsim.
Thaum kos duab tob tob, daim duab dawb paug raug tuav ntawm lub pwm kos duab thiab lub thawv dawb paug, thaum lub tshuab xuas kos duab rub cov khoom siv rau hauv lub pwm kos duab, rub nws ncig lub vojvoog kos duab los ua lub plhaub. Muaj kev sib txhuam ntau ntawm lub pwm thiab lub thawv dawb paug. Thaum lub sijhawm no, cov khoom siv raug nias rau sab nraud, uas yog qhov ua rau lub thawv dawb paug ntswj thiab radial elongation tawm tsam cov dej ntws ntawm cov khoom siv. Yog tias lub siab tuav siab dhau, cov khoom siv yuav tawg raws li qhov rub ntawm lub tshuab xuas ncab. Yog tias nws qis dhau, yuav muaj kev ntswj.
Muaj ib qho kev txwv ntawm lub plhaub txoj kab uas hla thiab lub qhov khoob uas tsis tuaj yeem dhau mus rau kev ua haujlwm kos duab zoo. Qhov kev txwv no txawv ntawm feem pua ​​​​​​ntawm kev ntev ntawm cov khoom. Txoj cai dav dav yog 55% txog 60% rau thawj zaug kos thiab 20% rau txhua qhov kos tom qab. Daim duab 1 yog tus qauv mis rau kev xam lub siab ntawm lub qhov khoob uas xav tau rau kev ncab (Kuv ib txwm ntxiv tsawg kawg 30% ntawm lub zog ntxiv ua qhov kev nyab xeeb, nws tuaj yeem txo qis yog tias xav tau, tab sis nws nyuaj rau nce tom qab tsim tiav).
Lub siab ntawm lub qhov tuav dawb paug p yog 2.5 N/mm2 rau hlau, 2.0 txog 2.4 N/mm2 rau cov hlau tooj liab thiab 1.2 txog 1.5 N/mm2 rau cov hlau txhuas.
Qhov sib txawv ntawm qhov tuab ntawm flange kuj qhia tau tias koj tus qauv tsim tsis muaj zog txaus. Koj lub khau pwm yuav tsum tuab txaus kom tiv taus qhov rub yam tsis muaj buckling. Qhov kev txhawb nqa hauv qab khau pwm yuav tsum yog hlau khov kho, thiab cov pins qhia pwm yuav tsum loj txaus kom tiv thaiv kev txav mus los ntawm sab saum toj thiab hauv qab pwm thaum lub sijhawm ncab.
Saib koj cov xov xwm thiab. Yog tias cov lus qhia nias tau hnav thiab tsis zoo, nws tsis muaj teeb meem yog tias koj lub cuab yeej muaj zog - koj yuav tsis ua tiav. Xyuas lub swb nias kom paub tseeb tias qhov ntev ntawm lub tshuab nias yog qhov tseeb thiab plaub fab. Xyuas kom tseeb tias koj cov roj pleev xim tau lim thiab tswj tau zoo, thiab tias qhov ntim ntawm cov cuab yeej siv thiab qhov chaw nozzle tau kho. Tshawb xyuas tag nrho cov cuab yeej luam ntawv kom zoo kom ntseeg tau tias qhov chaw tiav, txheej thiab sib npaug. Thiab them sai sai rau qhov radii kos duab; lawv cov geometry thiab qhov chaw tiav yuav tsum zoo meej.
Tsis tas li ntawd xwb, thaum cov neeg siv khoom feem ntau pom 304L thiab tus qauv 304 ua qhov sib pauv tau, 304L yog qhov kev xaiv zoo dua rau kev kos duab. L sawv cev rau cov pa roj carbon tsawg, uas muab 304L lub zog tso zis ntawm 0.2% ntawm 35 KSI thiab 304 ntawm 0.2% ntawm 42 KSI. Nrog rau 16% txo qis hauv lub zog tso zis, 304L xav tau lub zog tsawg dua los tso zis thaum tsim thiab teeb tsa cov duab tsim. Nws tsuas yog yooj yim dua rau siv.
Are shop stamping or tool and die issues confusing you?If so, please send your questions to kateb@thefabricator.com and have them answered by Thomas Vacca, Director of Engineering at Micro Co.
STAMPING Journal yog tib phau ntawv xov xwm kev lag luam uas mob siab rau kev pabcuam cov kev xav tau ntawm kev lag luam stamping hlau. Txij li xyoo 1989, cov ntawv tshaj tawm tau tshaj tawm txog cov thev naus laus zis tshiab, cov qauv kev lag luam, cov kev coj ua zoo tshaj plaws thiab xov xwm los pab cov kws tshaj lij stamping khiav lawv txoj kev lag luam kom zoo dua.
Tam sim no nrog kev nkag mus rau tag nrho cov ntawv digital ntawm The FABRICATOR, nkag mus tau yooj yim rau cov peev txheej muaj txiaj ntsig hauv kev lag luam.
Cov ntawv xov xwm digital ntawm The Tube & Pipe Journal tam sim no nkag tau tag nrho, muab kev nkag mus tau yooj yim rau cov peev txheej muaj txiaj ntsig hauv kev lag luam.
Txaus siab rau kev nkag mus rau tag nrho cov ntawv digital ntawm STAMPING Journal, uas muab cov kev nce qib tshiab tshaj plaws, cov kev coj ua zoo tshaj plaws thiab cov xov xwm kev lag luam rau kev lag luam hlau stamping.
Tam sim no nrog kev nkag mus rau tag nrho cov ntawv digital ntawm The Fabricator en Español, nkag mus tau yooj yim rau cov peev txheej muaj txiaj ntsig hauv kev lag luam.