1. Kev faib cov txheej txheem yooj yim
Raws li nws cov khoom deformation, cov txheej txheem stamping tuaj yeem muab faib ua ob pawg: cov khoom sib cais thiab sib sau.
Cov txheej txheem sib cais yog hais txog cov txheej txheem stamping uas qhov khoob khoob tau tawg thiab sib cais tom qab qhov kev ntxhov siab ntawm qhov deformed mus txog lub zog tensile nyob rau hauv qhov kev txiav txim ntawm lub stamping quab yuam, thiaj li yuav tau txais ib tug workpiece ntawm xav tau thiab loj.
Cov txheej txheem tsim yog hais txog cov txheej txheem stamping uas qhov kev ntxhov siab ntawm qhov deformed ntawm qhov khoob mus txog qhov chaw tawm los ntawm qhov kev txiav txim ntawm lub zog xuas nrig ntaus, tab sis tsis ncav cuag lub zog tensile, yog li ntawd cov 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. , yog li tau txais ib qho workpiece ntawm qhov xav tau cov duab thiab qhov loj me. .
2. Hom kev sib cais
Raws li lawv cov txheej txheem deformation sib txawv, cov txheej txheem sib cais tau muab faib ua ob pawg: xuas nrig ntaus thiab kho.
Punching: Hais txog xuas nrig ntaus ib daim ntawv nrog ib tug tuag raws ib tug tej yam nkhaus los yog txoj kab ncaj nraim (nrog rau cov pawg hauv qab no)
Kev kho dua tshiab yog ib txoj hauv kev ua kom rov ua dua cov ntu ntawm qhov khoob. Kev kho dua tshiab deformation yog kev txiav cov txheej txheem, thiab qhov tseeb qhov tseeb thiab ntu ntu zoo ntawm cov khoom ua haujlwm zoo dua li cov khoom seem.
3. Hom txheej txheem molding
Muaj ntau txoj kev tsim, suav nrog: khoov, sib sib zog nqus nqus, flanging, bulging thiab extrusion txheej txheem. (cov ntsiab lus raws li hauv qab no:)
02
xuas nrig ntaus
1. Kev taw qhia txog cov duab thiab cov txheej txheem ntawm cov khoom blanking
Cov duab ntawm cov khoom blanking. Cov seem ntawm cov khoom blanking yog muab faib ua: lub kaum sab xis ntawm lub cev qhuav dej, qhov ci ci, thaj tsam tawg, thiab burr. Cov ntaub ntawv plaub no yog tsim nyob rau hauv ntau theem, sib txawv qhov chaw, thiab nyob rau hauv txawv kev ntxhov siab thaum lub sij hawm blanking txheej txheem ntawm cov khoom.
Raws li pom hauv daim duab saum toj no, 1. Slump angle: qhov siab yog kwv yees li ntawm 8 feem pua T txog 15 feem pua T; 2. Bright band: qhov siab yog kwv yees li ntawm 15 feem pua T txog 55 feem pua T; 3. Fault zone: qhov siab yog kwv yees li ntawm 35 feem pua T txog 75 feem pua T; 4. Glitch: qhov siab yog kwv yees li ntawm 5 feem pua T txog 10 feem pua T
1) Elastic deformation theem
Kev ntsuam xyuas kev ntxhov siab: Cov khoom siv ntawm qhov txiav yog raug rau lub zog shear, thiab qhov loj ntawm lub zog yog tsawg dua li qhov txwv elastic. Yog tias lub zog ploj mus, cov khoom siv rov qab mus rau nws qhov qub.
Lub xeev cov lus piav qhia: Lub punch exerts siab ntawm cov khoom, thiab cov khoom me ntsis squeezes mus rau hauv lub txiav ntug ntawm cov tuag.
2) Yas deformation theem
Kev ntsuam xyuas kev ntxhov siab: cov khoom siv yog kev ntxhov siab los ntawm sab mus rau qhov chaw, thiab maj mam dhau qhov kev txwv elastic
Lub xeev cov lus piav qhia: Cov punch nkag mus tob rau hauv cov khoom, thiab nyob rau theem no, qhov blanking ib feem ua rau lub kaum sab xis thiab lub teeb ci.
3) Shearing theem
Kev Ntsuam Xyuas Kev Nyuaj Siab: Ib feem ntawm qhov kev ntxhov siab ntawm cov khoom nyob ze rau ntawm qhov txiav ntawm qhov tuag thawj zaug mus txog lub zog shear ntawm cov khoom, uas ua rau cov kab nrib pleb tsim los ntawm cov khoom nyob ib sab ntawm qhov txiav ntawm qhov tuag. Nyob rau lub sijhawm no, cov khoom ntawm kev txiav ntug ntawm cov punch tseem nyob rau hauv cov yas deformation theem. Raws li cov punch nkag mus ntxiv rau hauv cov khoom, cov khoom nyob ze ntawm lub punch kuj ncav cuag lub zog shear, thiab cov kab nrib pleb kuj tsim. Tom qab ntawd, ob qho tib si sib tshooj thiab cov khoom sib cais.
duab
Cov lus piav qhia txog xwm txheej: Cov khoom sib cais, thiab thaum cov kab nrib pleb sab saud thiab qis sib tshooj, lawv rhuav tshem ib leeg thiab tsim burrs
duab
03
Cov ntsiab lus tseem ceeb thiab kev tsim qauv ntawm kev xuas nrig ntaus tshuab cuam tshuam nrog cov khoom tsim
1. Kev faib tawm, kev ua haujlwm thiab cov qauv ntawm cov khoom blanking
tho qhov
Muaj nuj nqi 1. Siv raws li kev dav dav ntawm lub qhov (qhov yuav tsum tau qis dua); 2. Siv los ua tus kheej tapping hauv qab qhov (cov khoom tsim yuav tsum muaj ntau dua ntawm cov kab ci ntsa iab); 3. Siv raws li qhov siab-precision ncej qhov (yuav tsum tsis muaj burrs, tsawg dua fractured siv) ) (los ntawm cov neeg kho tshuab deburring lossis pwm inversion)
Lus Cim: Thaum tsim lub qhov punching, vim qhov kev txwv ntawm lub zog ntawm lub punch, qhov loj ntawm lub qhov yuav tsum tsis txhob me me (feem ntau ntau dua 0.5T)
duab
Blanking stamping
Muaj nuj nqi 1. Siv raws li cov qauv dav dav (qis dua); 2. Siv los ua lub pob tw laser vuam sib dhos (tsis muaj burrs, loj ci bands, me me hauv cheeb tsam tawg); 3. Siv los ua cov khoom muag muag muag (yuav tsum tau curling lossis Deburring)
Lus Cim: 1. Thaum tsim cov khoom, cov pob qij txha ntawm cov kab ncaj nraim los yog nkhaus ntawm cov khoom seem yuav tsum muaj cov fab sib npaug. ( Txwv tsis pub, qhov kev ntxhov siab ntawm qhov tuag yuav muaj zog thiab yooj yim puas); 2. Xav txog cov txheej txheem kev ua haujlwm ntawm cov hlau tuag txiav, qhov blanking los yog qhov tsawg kawg nkaus R lub kaum sab xis ntawm qhov blanking yuav tsum tsis txhob tsawg dua R0.2.
duab
Tus nplaig txiav, txiav zaj nkauj lancing
Muaj nuj nqi 1. Siv raws li ib tug buckle; 2. Siv raws li kev txwv; 3. Txuag cov txheej txheem, txhim kho kev siv tus nqi ntawm cov ntaub ntawv, thiab ua ke ob txheej txheem ntawm trimming thiab khoov rau hauv ib qho. (Qhov tsis zoo: Cov kev taw qhia ntawm lub burr tsis tuaj yeem hloov pauv, nws yuav tsum yog qhov sib txawv ntawm qhov kev taw qhia ntawm lub punch)
Nco tseg: Nws yuav tsum tau hais tias qhov kev ncua deb ntawm qhov txiav thiab qhov khoov yog qhov loj txaus kom tau raws li lub zog ntawm cov punch.
duab
Cov ntsiab lus rau kev mloog hauv kev tsim qauv ntawm tus nplaig txiav thiab khoov:
1) Qhov dav ntawm lub punch yuav tsum loj txaus thaum txiav, thiab qhov kev ncua deb ntawm qhov txiav thiab qhov khoov yuav tsum yog ntau tshaj 5 hli thaum tsim ib feem, txwv tsis pub lub zog ntawm cov punch yuav qis, uas yuav cuam tshuam rau lub neej. ntawm pwm.
2) Thaum tsim cov pwm, txiav ib feem ntawm riam ntug yuav tsum xyuas kom meej ib tug ncaj ntug ntawm li 3 hli los tiv thaiv riam los ntawm kev sib tsoo. Yuav tsum tau so ntawm ob sab ntawm lub punch, thiaj li xyuas kom meej tias nws raug txiav ua ntej thiab tom qab ntawd khoov.
duab
Cov ntsiab lus ntawm cov khoom tsim cov ntsiab lus muaj feem xyuam rau blanking
1) Thaum tsim cov khoom, cov pob qij txha ntawm cov kab ncaj nraim los yog nkhaus ntawm cov khoom seem yuav tsum muaj cov fab sib npaug. (Yog vim li cas: 1. Qhov tsawg kawg nkaus R lub kaum sab xis ntawm cov hlau zoo tib yam yog 0.2, thiab cov kaum ntse ntse tsis yooj yim lav. nyuaj siab.)
2) Cov kev taw qhia ntawm burr yuav tsum tau cim thaum tsim cov khoom. Lub burr tseem ceeb heev rau kev nyab xeeb ntawm cov khoom sib dhos thiab cov neeg ua haujlwm khiav haujlwm. (Ceeb toom: cov kev taw qhia ntawm burr yog cim, tsis yog cov kev taw qhia ntawm xuas nrig ntaus)
3. tsawg dua 0.8T)
4) Thaum tsim cov khoom, lub zog tensile ntawm cov khoom yuav tsum tsawg dua 630MPa ntau li ntau tau, txwv tsis pub cov pwm yuav nyuaj rau kev tsim khoom. (Thaum lub zog tensile ntawm cov khoom yog tsawg dua 630MPa, cov khoom pwm tuaj yeem xaiv los ntawm cov pwm zoo tib yam uas pheej yig, xws li: Cr12, Cr12MoV, SKD11, D2, thiab lwm yam. Thaum lub zog tensile ntawm cov khoom yog ntau dua 630MPa. , cov khoom siv pwm yuav tsum tau xaiv los ntawm cov pwm tshwj xeeb kim kim, xws li SKH-9)
duab
5) Thaum cov khoom tsim muaj cov kev cai tshwj xeeb rau kev xuas nrig ntaus, qhov tsawg kawg nkaus tus nqi ntawm txhua ntu yuav tsum raug cim.
6) Thaum txiav, xyuam xim rau kev tsim lub kaum sab xis ntawm cov khoom kom yooj yim demoulding, yog li txo qhov hnav ntawm cov punch.
duab
2. Kev qhia luv luv ntawm xuas nrig ntaus tuag
1) xuas nrig ntaus, blanking tuag
2) Deburring pwm
3) Sab punching tuag
04
Khoov cov khoom daim ntawv thiab tsim cov txheej txheem qhia
1. Cov khoom zoo li nkhaus
Bending forming mechanism: Qhov kev ntxhov siab ntawm cov khoom siv hlau yog ntau dua li qhov txwv elastic (yield zog) tab sis tsawg dua qhov kev txwv ntawm kev puas tsuaj (lub zog tensile), ua rau curvature ntawm daim ntawv hloov pauv hauv qhov khoov deformation cheeb tsam, tsim khoov.
Kev ntsuam xyuas kev ntxhov siab ntawm kev khoov: thaum khoov, sab hauv ntawm cov khoom yog raug compressive kev nyuaj siab thiab sab nrauv yog raug rau tensile kev nyuaj siab, thiab tensile kev nyuaj siab plays lub luag hauj lwm tseem ceeb, yog li cov nruab nrab txheej ntawm cov khoom yog qhov chaw ntawm lub cov khoom uas yog biased rau sab hauv ntawm lub dabtsi yog khoov.
duab
Cov txheej nruab nrab: txog 0.255T los ntawm sab hauv ntawm cov khoom
Cov txheej fiber ntau ntawm cov khoom txav mus rau cov khoom siv vim qhov tensile kev nyuaj siab, thiab qhov tsis txaus ntawm cov khoom yog ntxiv los ntawm qhov dav kev taw qhia.
2. Cov txheej txheem dabtsi yog khoov (coj V nkhaus ua piv txwv):
1) Lub zog ntawm cov punch thiab daim ntawv tiv tauj (dawb) tsim lub sijhawm khoov vim qhov sib txawv ntawm qhov sib txuas ntawm cov pwm thiab cov pwm, thiab elastic deformation tshwm sim nyob rau hauv qhov kev txiav txim ntawm lub sijhawm khoov, ua rau khoov.
2) Raws li cov punch txuas ntxiv mus rau hauv qab, qhov khoob thiab qhov chaw tuag maj mam tuaj rau hauv kev sib cuag, kom lub vojvoog khoov thiab khoov caj npab raug txo kom haum, thiab qhov chaw sib cuag ntawm qhov khoob thiab qhov tuag txav los ntawm ob. lub xub pwg nyom ntawm qhov tuag mus rau ob nqes ntawm qhov tuag.
3) Raws li cov punch txuas ntxiv mus, ob qhov kawg ntawm qhov khoob hu rau txoj kab nqes ntawm lub punch thiab pib khoov.
4) Nyob rau hauv lub flattening theem, raws li qhov sib txawv ntawm lub punch thiab tuag txuas ntxiv txo, daim ntawv yog flattened ntawm lub punch thiab tuag.
5) Nyob rau theem kho, thaum mob stroke dhau lawm, daim ntawv raug kho kom cov kab sib npaug thiab cov npoo ncaj haum rau cov punch los tsim cov duab uas xav tau.
duab
3. Ob hom teeb meem uas yuav tshwm sim hauv cov khoom khoov (rebound, cracking)
1) Rov qab:
Yog vim li cas rau springback: cov khoom yog tsim los ntawm ntau cov khaubncaws sab nraud povtseg ntawm fibers, thiab kev nyuaj siab ntawm txhua txheej ntawm fibers yog txawv, (cov txheej sab nrauv muaj qhov loj tensile kev nyuaj siab, lub innermost txheej muaj qhov loj tshaj compressive kev nyuaj siab, qhov loj ntawm ob. quab yuam txo qis mus rau qhov nruab nrab txheej), yog li tom qab khoov, tsis yog tag nrho cov fiber ntau cov khaubncaws sab nraud povtseg siab tshaj qhov elastic txwv ntawm cov khoom, yog li cov khoom nyob rau hauv lub elastic deformation theem muaj ib tug rov tshwm sim.
duab
1) Qhov kev ntxhov siab thiab lub zog ntawm cov txheej nruab nrab yog xoom
2) Lub compressive kev nyuaj siab ntawm nruab nrab txheej maj mam nce mus rau sab hauv
3) Lub zog tensile ntawm cov txheej nruab nrab maj mam nce sab nraud
duab
1) Thaum lub stamping yog khoov, qhov ntau ntawm cov ntaub ntawv txheej nkag mus rau hauv cov yas deformation, thiab cov txheej txheem no tsis rov qab.
2) Cov txheej txheem ntawm cov ntaub ntawv los ze zog mus rau lub nruab nrab txheej yog tseem nyob rau hauv lub elastic deformation cheeb tsam, thiab cov ntaub ntawv txheej yuav rov qab los tom qab lub sab nraud quab yuam ploj mus (qhov dabtsi yog khoov punch tawm ntawm workpiece)
Cov yam ntxwv cuam tshuam txog kev rov qab:
(1) Qhov siab dua qhov elastic txwv ntawm cov khoom, qhov ntau dua qhov yuav tsum tau deformation kev nyuaj siab thiab ntau dua qhov rebound
(2) Qhov me me ntawm cov txheeb ze dabtsi yog khoov vojvoog R / T ntawm cov khoom, qhov ntau concentrated qhov kev ntxhov siab, qhov sib piv ntawm elastic deformation me me, thiab qhov me me rebound.
duab
2) tawg
Thaum qhov kev ntxhov siab ntawm ib feem ntawm cov khoom txheej ntawm lub workpiece yog siab tshaj qhov tensile txwv thaum khoov, lub workpiece yuav tawg. (Qhov deb ntawm cov khoom txheej yog los ntawm cov txheej nruab nrab, qhov ntau dua qhov kev ntxhov siab thiab strain)
duab
Txoj hauv kev kom tsis txhob tawg: Thaum khoov, R lub kaum sab xis hauv lub ces kaum me dhau. (feem ntau tus nqi R tsis tsawg dua 0.5T)
4. Deformation yam ntxwv ntawm cov khoom khoov
(1) Vim lub tensile kev nyuaj siab ntawm cov txheej fiber ntau ntawm cov khoom, cov khoom txav kuj, thiab cov khoom tsis txaus yog supplemented los ntawm qhov dav thiab thickness, yog li qhov dav ntawm cov khoom yog txo.
(2) Vim lub compressive kev nyuaj siab ntawm lub puab txheej fibers ntawm cov khoom, lub puab txheej cov ntaub ntawv tsiv mus rau lub dav kev taw qhia, uas ua rau ib tug nce nyob rau hauv lub dav ntawm lub puab txheej ntawm cov khoom.
(3) Thaum qhov dav tsawg dua 3 npaug ntawm cov khoom tuab, qhov tshwm sim saum toj no yog qhov pom tseeb, thiab cov khoom tsim yuav tsum zam qhov xwm txheej uas qhov dav tsawg dua 3 npaug ntawm cov khoom tuab.
duab
5. Cov ntsiab lus tseem ceeb thiab cov qauv tsim qauv ntawm cov txheej txheem khoov muaj feem xyuam rau cov khoom tsim
(1) The fillet radius of the bent part should not be smaller than the minimum bending radius to avoid cracks; but it should not be too large, otherwise the rebound will be large due to incomplete deformation. (Generally, the minimum bending radius R>=0.5T)
Daim ntawv ceeb toom:
1) Thaum tsim cov khoom, qhov khoov R lub kaum sab xis yuav tsum zam kom me me dhau, txwv tsis pub nws yuav yooj yim ua rau muaj kev ntxhov siab.
2) R lub kaum sab xis yuav tsum tau cim rau sab hauv. (Tshwj xeeb yog vim li cas: lub workpiece nyob ze rau lub punch thaum khoov, thiab R lub kaum sab xis ntawm lub punch txiav txim R lub kaum sab xis ntawm lub workpiece, thiab nws yooj yim los tswj thiab kho.)
duab
(2) The length of the bending edge of the bending part should not be too small, otherwise the length of the support of the mold to the material is too small during the bending, it is not easy to obtain parts with accurate shape, and the bending part is often easy to fall out. H>R plus 2 T.
duab
Lus Cim: Thaum tsim cov khoom, tsis txhob khoov ntawm ntug ncaj me me, txwv tsis pub nws yuav yooj yim ua rau sab nrauv poob, thiab nws yog qhov nyuaj los tswj qhov ntsug.
(3) Qhov khoov yuav tsum tsis txhob khoov ntawm qhov kev hloov tam sim ntawd ntawm qhov dav ntawm qhov kom tsis txhob tawg. Yog tias nws yuav tsum tau khoov ntawm qhov kev hloov pauv sai sai hauv qhov dav, cov txheej txheem zawj yuav tsum tau tsim ua ntej.
(4) Vim tias 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.
6. Kev qhia luv luv ntawm kev khoov tuag
05
Moulding txheej txheem daim ntawv thiab txheej txheem qhia
1. Kev faib tawm thiab kev qhia txog cov txheej txheem molding
Kev tsim cov txheej txheem: Cov kev ntxhov siab ntawm cov khoom siv hlau yog ntau dua li qhov txwv elastic (yield zog) tab sis tsawg dua qhov kev txwv kev tawg (lub zog tensile), thiab hom deformation xav tau los ntawm tus tsim qauv yog tsim nyob rau hauv cov yas deformation ntau yam.
duab
Cov txheej txheem kev faib tawm: 1. Sib sib zog nqus nqus 2. Extrusion 3. Flanging 4. Flipping (tswj) 5. shrinking thiab flaring
duab
2. Cov ntsiab lus tseem ceeb ntawm cov txheej txheem molding ntsig txog cov khoom tsim thiab cov qauv tsim
1) Nyem
Muaj peb txoj haujlwm ntawm extrusion convex hull:
(1) Siv los ua tus pin tus kheej ntawm ob qhov chaw
duab
Daim ntawv ceeb toom:
a. Thaum tus thawj coj siv los ua tus pin positioning, txoj kab uas hla ntawm tus thawj coj yuav tsum tau tswj nruj me ntsis. Feem ntau, txoj kab uas hla ntawm tus thawj coj tuaj yeem tswj tau ntawm qhov ntxiv /- 0.04mm
b. Txij li thaum lub convex hull yog extruded, ob sab ntawm convex hull yog tag nrho cov ci bands;
(2) Siv raws li qhov txwv ntawm kev txav mus los
duab
(3) Siv los ua pob rau qhov projection vuam
duab
Nco ntsoov cov ntsiab lus thiab punch loj ntawm convex hull tsim:
Principles: 1) It is necessary to ensure that there is sufficient material connection between the convex hull and the matrix, otherwise the convex hull is easy to fall off. 2) When used as projection welding, the bump diameter D>{{0}}t ntxiv rau 0.7, thiab ntau dua 1.8mm.
Bump height H>{{0}}(0.4t ntxiv rau 0.25), thiab ntau dua 0.5mm
Cov qauv tsim qhov ntev ntawm lub convex hull txwv qhov siab yog raws li qhia hauv daim duab hauv qab no
duab
duab
Lus Cim: Thaum kos qhov loj ntawm lub convex hull, tsuas yog qhov loj ntawm qhov convex tuaj yeem tswj tau, thiab qhov loj ntawm qhov concave tsis tuaj yeem tswj tau.
Extrusion Convex Die Structure: Qhov loj ntawm qhov tuag txiav txim siab txoj kab uas hla ntawm lub convex hull. Lub thimble thiab extrusion punch ua ke txiav txim siab qhov siab ntawm lub convex hull. Lus Cim: Thaum kos qhov loj ntawm lub convex hull, tsuas yog qhov loj ntawm qhov convex tuaj yeem tswj tau, thiab qhov loj ntawm qhov concave tsis tuaj yeem tswj tau.
duab
2) lub qhov taub
Lub twj tso kua mis muaj ob txoj haujlwm:
a) Siv los ua rivet txuas qhov chaw (xws li xuas nrig ntaus riveting thiab tig riveting);
Qhov zoo: rivets tuaj yeem raug tshem tawm, txuag nqi.
Disadvantages: Tsis tuaj yeem tiv taus lub zog rub tawm lossis lub zog shear.
Qhov punching thiab riveting: nws ua raws li kev sib txuas ruaj khov.
Rub lub qhov tig riveting: nws ua raws li ib tug rotating ncej.
duab
b) Siv los ua cov txiv ntoo txuas
duab
Cov ntsiab lus rau kev mloog hauv qhov tsim thiab punch loj:
Lub hauv paus ntsiab lus: a) Cov khoom txaus txaus yuav tsum tau ua kom ntseeg tau (piv txwv li, kev ua tau zoo yuav tsum tau suav).
b) Thaum siv los ua riveting, sab nraud txoj kab uas hla ntawm lub qhov extraction (dimension standard txheej txoj kab uas hla) yuav tsum tau tswj.
duab
Lus Cim: Cov pwm tuaj yeem tswj tau ob qho tib si sab hauv thiab sab nraud ntawm lub qhov nqus dej, lub punch tswj lub puab txoj kab uas hla; tus tuag tswj lub sab nraud, tab sis tsis nyob rau tib lub sijhawm. Ntawd yog, txhua ntu tuaj yeem tswj tau ib qho nqi xwb.
c) Thaum siv los ua txiv ntseej, lub taub sab hauv ntawm lub twj tso kua mis lub qhov (qhov loj ntawm tus qauv sab hauv txoj kab uas hla) yuav tsum tau tswj.
duab
d) Thaum siv los ua cov txiv ntoo, nws yuav tsum tau ua kom ntseeg tau tias lub thickness ntawm thinned ncaj ntug yog ntau dua 1.3 npaug ntawm cov xov suab.
duab
e) Thaum nws yog siv los ua cov txiv ntoo thiab muaj lub zog yuav tsum tau ua, nws yuav tsum tau ua kom ntseeg tau tias qhov siab tsawg kawg nkaus ntawm cov ntug ncaj tom qab drilling lub qhov yog ntau dua 3 npaug ntawm cov xov suab.
duab
Pumping qhov feasibility xam:
Qhov Qhov: Ib txheej txheem stamping uas cov khoom raug hloov mus rau hauv ib sab flange raws qhov ncig ntawm lub qhov sab hauv.
Qhov kev sib hloov coefficient: qhov sib piv ntawm txoj kab uas hla ntawm lub qhov pre-punched mus rau txoj kab uas hla ntawm lub ntug ncaj tom qab tig lub qhov (qhov loj dua lub qhov tig coefficient, qhov me dua qhov degree ntawm deformation)
duab
Cov yam ntxwv cuam tshuam rau lub qhov taub coefficient:
a) Lub plasticity ntawm cov khoom, qhov zoo dua cov yas, qhov me me ntawm qhov tig coefficient.
b) Tus txheeb ze txoj kab uas hla D / t ntawm lub qhov pre-punched, qhov me dua qhov D / t, qhov me me ntawm qhov tig coefficient.
c) Qhov txheej txheem txheej txheem. (Yog tias lub qhov tig yog siab dua, nws tsis yooj yim rau tawg thaum lub burr nyob rau sab hauv; thaum nws nyob rau sab nraud, nws yog ib qho tsim nyog yuav tsum tau nce cov txheej txheem saum npoo thiab tom qab ntawd laum lub qhov.)
d) Daim ntawv ntawm lub qhov punch. (Cov punch kheej kheej tuaj yeem txo qhov kev sib hloov coefficient thiab nce qib ntawm deformation.)
Hauv txoj kev xav, nws yuav tsum txiav txim siab seb cov txheej txheem siv dej puas ua tau raws li kev siv cov coefficient (qhov no yuav tsum tau txiav txim siab ntau yam, uas yog siv sijhawm ntev thiab siv zog ntau). Feem ntau, nws tuaj yeem raug txiav txim raws li kev sib raug zoo ntawm kev sib tsoo ua ntej thiab cov khoom tuab. Thaum tus txheeb ze txoj kab uas hla D / t ntawm lub qhov pre-punched yog ntau dua 1, nws yog feem ntau suav hais tias ua tau.
Kev suav ntawm pre-punched qhov loj:
Txoj Cai: Lub hauv paus ntsiab lus ntawm qhov ntim tas li ua ntej thiab tom qab tig lub qhov.
AB ={H*EF-(π/4-1)*EF*EF}/T
Pre-punched qhov taub d=D-2*AB
Feem ntau, cov thickness ntawm cov khoom yuav thinner tom qab tig lub qhov, thiab cov thinning coefficient yog nyob nruab nrab ntawm {{0}}.45 thiab 0.9.
Lub thinning yam yog hais txog qhov piv ntawm EF rau thickness T ntawm raw khoom
It is generally believed that when d>=T, drilling yog ua tau (tus nqi empirical, cov lus txiav txim kom ntxaws tuaj yeem xa mus rau qhov coefficient drilling)
duab
Qhov-daim duab pwm qauv
duab
Lub qhov punching punch qauv: a) Thaum siv cov punch parabolic, qhov zoo ntawm txoj siav yog siab dua vim yog cov arc ntau dhau. (Cov qauv yog raws li nram no)
duab
Lus Cim: Thaum lub vojvoog ntawm lub arc sib txawv, cov nyhuv extrusion ntawm cov punch ntawm cov khoom sib txawv. Vim hais tias qhov me me arc punch yog me me dhau lawm, lub zog extrusion instantaneous ntawm cov khoom yog loj, yog li lub deformation ntawm cov khoom kuj loj. Yog li ntawd, nyob rau hauv tib txoj kev, lub me me arc punch yog siv los tig lub qhov. Siab dua.
b) Ib qho kev txhaj tshuaj molding tsis ua ntej punching.
duab
Lus Cim: Qhov luaj li cas ntawm lub qhov tho yog raws li qhov loj ntawm lub qhov pre-punched nyob rau hauv ob daim ntawv (A=a, B=b). Ib zaug xuas nrig ntaus thiab tig qauv tsuas yog tsim nyog rau rooj plaub uas tig burrs nyob rau sab nraud.
3) Concave flanging
Flanging yog cov txheej txheem ntawm tig cov khoom mus rau hauv ib sab luv luv sab raws lub contour nkhaus.
a) Concave flanging (elongated flanging): qhov deformation zoo ib yam li lub qhov.
b) Qhov thinning npaum li cas ntawm 0.9 thiab 1 (qhov chaw deformed loj tshaj plaws yog nyob rau ntawm lub ntsej muag siab tshaj plaws)
Feasibility kev txiav txim ntawm concave flanging:
a) nthuav dav
duab
b) Kev txiav txim
Xaus arc ntev L1 ua ntej flanging
Xaus arc ntev L2 tom qab flanging
Thaum lub deformation tus nqi K ntawm qhov kawg nto yog ntau tshaj qhov elongation tus nqi ntawm cov khoom raw, tawg yuav tshwm sim.
duab
Thaum lub sij hawm tsim khoom, qhov tseem ceeb ntawm R, r, thiab h tuaj yeem hloov kho kom tus nqi deformation ntawm lub ntsej muag kawg ua tau raws li cov qauv tsim yam tsis muaj kev tawg.
4) Convex flanging
a) Convex flanging (compression flanging): Cov cuab yeej deformation belongs rau compression molding.
b) Nthuav qhov ntev ntawm lub convex flange
duab
06
Taw qhia rau lwm cov qauv stamping tuag
1. Rolling pwm qauv (txoj kev 1)
Cov kauj ruam: 1. Dov ib-yim ntawm ib lub voj voog, 2. Curve upwards obliquely ntawm 80 degrees, 3. Push down los ua ib lub voj voog.
duab
2. Rolling pwm qauv (txoj kev 2)
Cov kauj ruam: 1. Dov ib lub voj voog peb lub hlis twg, 2. Siv lub slider los thawb rau sab.
3. Flatten lub pwm qauv (flatten lub sab ntug)
Cov kauj ruam: 1. Ncua tseg; 2. Upward khoov 90 degrees; 3. Nias down 70 degrees (qhov loj ntawm lub punch R yog ob npaug ntawm cov khoom tuab ntawm cov khoom rho tawm 0.3) 4. Flattening
duab
4. Flattening pwm qauv ( puab lub qhov flattening)
Cov kauj ruam: 1. Ncua tseg; 2. Upward khoov 90 degrees; 3. Nias down 70 degrees (qhov loj ntawm lub punch R yog ob npaug ntawm cov khoom tuab ntawm cov khoom rho tawm 0.3) 4. Flattening
duab
5. Sib sib zog nqus nqus qauv
