1. Yam tsawg kawg nkaus khoov vojvoog ntawm phaj
Thaum cov khoom yog khoov, txheej txheej yog stretched thiab cov txheej sab hauv yog compressed nyob rau hauv lub fillet cheeb tsam. Thaum cov khoom tuab tas li, qhov me me ntawm sab hauv lub vojvoog r yog, qhov hnyav dua qhov tensile thiab compression ntawm cov khoom yuav yog; Thaum lub tensile kev nyuaj siab ntawm cov txheej fillet tshaj qhov kawg ntawm lub zog ntawm cov khoom, tawg thiab tawg yuav tshwm sim. Yog li ntawd, tus qauv tsim ntawm dabtsi yog khoov qhov chaw yuav tsum tsis txhob me me dabtsi yog khoov fillet vojvoog. Qhia qhov tsawg kawg nkaus dabtsi yog khoov vojvoog rau lub hom phiaj no.
L Lub vojvoog dabtsi yog khoov yog hais txog lub vojvoog sab hauv ntawm cov khoom khoov, thiab t yog phab ntsa tuab ntawm cov khoom.
L t yog cov khoom siv phab ntsa tuab, M yog lub xeev annealed, Y yog lub xeev nyuaj, thiab Y2 yog 1/2 lub xeev nyuaj.
Rau qhov chaw khoov kaw raws li qhia hauv daim duab hauv qab no, qhov siab tshaj plaws dabtsi yog khoov h yuav tsum tsis pub tshaj 40mm. Yog tias nws yuav tsum tau tshaj 40mm, nws yuav tsum tau kuaj xyuas ua ntej siv.
2. Yam tsawg kawg nkaus ncaj ntug qhov siab rau khoov
Qhov ncaj ntug qhov siab ntawm dabtsi yog khoov yuav tsum tsis txhob me dhau, txwv tsis pub nws tsis yooj yim los tsim lub sijhawm bending txaus, thiab nws yog ib qho nyuaj kom tau txais cov khoom nrog cov duab zoo. Tus nqi h Ntau dua lossis sib npaug rau R ntxiv 2t tau txais.
① Yam tsawg kawg nkaus qhov siab qhov siab feem ntau
Qhov ncaj ntug qhov siab ntawm dabtsi yog khoov qhov chaw yuav tsum tsis txhob me dhau, thiab qhov tsawg kawg nkaus qhov siab yuav tsum yog h ＞ 2t raws li daim duab yuav tsum tau ua.
Yam tsawg kawg nkaus ncaj ntug qhov siab ntawm khoov qhov chaw
② Qhov siab ntawm ntug ncaj nrog cov kev cai tshwj xeeb
Yog hais tias qhov ncaj ntug qhov siab h Tsawg dua los yog sib npaug rau 2t ntawm qhov khoov qhov yuav tsum tau ua nyob rau hauv kev tsim, qhov khoov qhov siab yuav tsum tau nce ua ntej, thiab tom qab ntawd qhov khoov yuav tsum tau ua raws li qhov yuav tsum tau ua; Los yog khoov tom qab machining ntiav grooves nyob rau hauv bending deformation cheeb tsam.
Qhov yuav tsum tau muaj rau qhov ncaj ntug qhov siab hauv cov xwm txheej tshwj xeeb
③ Qhov siab ntawm ntug ncaj nrog bevel ntawm sab ntawm ntug ntug
Thaum qhov dabtsi yog khoov nrog lub kaum sab xis ntawm lub kaum sab xis ntawm qhov khoov ntug, qhov tsawg kawg nkaus qhov siab ntawm sab yog: h=(2 - 4) t ＞ 3mm
Qhov siab ntawm ntug ncaj nrog bevel nyob rau sab ntawm nkhaus ntug
3. Kev kho deformation ntawm khoov ncaj npoo
① Thaum ＜ R, tom qab khoov, tseem muaj qhov seem seem nyob ze ntawm qhov chaw b. Txhawm rau zam qhov seem arc, yuav tsum tau ua kom ntau dua lossis sib npaug rau R.
② Ntawm U-shaped dabtsi yog khoov daim, ob lub npoo npoo yuav tsum sib npaug ntawm qhov ntev kom tsis txhob txav mus rau ib sab thaum khoov. Yog tias tsis tso cai, qhov txheej txheem qhov chaw tuaj yeem raug teeb tsa.
③ Tiv thaiv kev tawg lossis deformities thaum sab (trapezoid) khoov. Lub groove reserved yuav tsum tau tsim, los yog lub hauv paus yuav tsum tau hloov mus rau ib tug stepped duab. Groove width K Ntau dua los yog sib npaug rau 2t, zawj qhov tob L Ntau dua los yog sib npaug rau t + R ntxiv rau K / 2.
④ Cov ntawv tshwj xeeb yuav tsum tau tsim los tiv thaiv cov fillet ntawm wrinkling tom qab extrusion vim compression thaum khoov. Xws li daim ntawv txiav ntawm fillet ntawm sab phaj (saum kawg, qis kawg) ntawm chav tsev sab nraum zoov.
B yog sib npaug rau lub npog phaj thickness (t)
⑤ Txhawm rau tiv thaiv wrinkles ntawm ob sab ntawm lub kaum sab xis tom qab khoov, qhov tshwj xeeb txiav yuav tsum tsim.
⑥ Txiav daim ntawv los tiv thaiv lub caij nplooj ntoos hlav tom qab khoov.
Ib tug ntau dua los yog sib npaug rau 1.5t (t - khoom thickness)
⑦ . Txiav daim ntawv los tiv thaiv cov kab nrib pleb los ntawm kev khoov tom qab xuas nrig ntaus.
⑧ Tiv thaiv ib sab ntawm kev cog lus sab hauv thaum khoov. Cov txheej txheem nrhiav lub qhov tuaj yeem tsim tau, lossis ob sab tuaj yeem khoov rau tib lub sijhawm, lossis qhov teeb meem shrinkage tuaj yeem daws tau los ntawm kev nce qhov dav.
⑨ Daim ntawv lapping yog khoov rau hauv lub kaum sab xis.
4. Khoov ntawm convex ib feem
Yog hais tias qhov nkhaus nkhaus yog raws li cov kauj ruam kab raws li qhia nyob rau hauv daim duab a, tej zaum nws yuav tawg thiab deform ntawm lub hauv paus. Yog li ntawd, ua kom qhov nkhaus nkhaus kom deb ntawm cov kauj ruam raws li qhia hauv daim duab b, los yog tsim cov thais raws li qhia hauv c thiab d.
5. Qhov ntug nrug deb ntawm qhov khoov daim
Qhov ntug nrug deb: xuas lub qhov ua ntej thiab tom qab ntawd khoov nws. Txoj hauj lwm ntawm lub qhov yuav tsum nyob sab nraum qhov khoov deformation cheeb tsam kom tsis txhob deformation ntawm lub qhov thaum khoov. Qhov kev ncua deb ntawm lub qhov phab ntsa mus rau qhov khoov ntug yog qhia nyob rau hauv lub rooj.
Table Hole ntug nrug ntawm dabtsi yog khoov daim
① Thaum khoov, lub qhov ntawm qhov chaw khoov yuav raug deformed tom qab kev ntxhov siab, thiab tus nqi A ntawm lub qhov ntug qhov deb (mus rau hauv qab hauv paus) yog ntau dua los yog sib npaug rau 4.
② Thaum xuas nrig ntaus cov ntug khoov, qhov kev ncua deb L ntawm lub qhov ntug mus rau qhov nruab nrab ntawm lub vojvoog khoov R yuav tsum tsis txhob me me kom tsis txhob lub qhov deformation tom qab khoov thiab tsim. Nws tus nqi L Ntau dua lossis sib npaug rau 2t.
6. txheej txheem txiav nrog kev khoov hauv zos
① Txoj kab khoov ntawm qhov khoov yuav tsum zam qhov chaw ntawm qhov hloov pauv tam sim ntawd
Thaum khoov ntawm ntug ntawm ib ntu hauv zos, txhawm rau tiv thaiv kev khoov cov kab nrib pleb los ntawm kev ntxhov siab ntawm cov kaum ntse ntse, qhov nkhaus nkhaus tuaj yeem txav tau qee qhov kev ncua deb kom tawm ntawm qhov kev hloov pauv tam sim ntawd (Daim duab a), lossis cov txheej txheem zawj (Daim duab b) tuaj yeem qhib tau, lossis lub qhov txheej txheem (Daim duab c) tuaj yeem raug xuas nrig ntaus. Nco ntsoov qhov loj me me hauv daim duab: S Ntau dua lossis sib npaug rau R; Groove dav k Ntau dua lossis sib npaug t; Groove qhov tob L Ntau dua lossis sib npaug rau t + R + k / 2.
② Thaum lub qhov nyob hauv qhov chaw khoov deformation, daim ntawv txiav tau txais
Piv txwv ntawm daim ntawv txiav siv thaum lub qhov nyob hauv qhov khoov deformation cheeb tsam
7. Kev tsim cov kev cai rau kev tuag ntug
Qhov ntev ntawm qhov tuag ntug yog cuam tshuam nrog lub thickness ntawm cov khoom. Raws li pom nyob rau hauv daim duab hauv qab no, feem ntau qhov tsawg kawg nkaus ntawm qhov tuag ntug L Ntau dua los yog sib npaug rau 3.5t ntxiv rau R.
Qhov twg, t yog cov khoom siv phab ntsa thickness, thiab R yog qhov tsawg kawg nkaus sab hauv khoov vojvoog ntawm cov txheej txheem dhau los.
8. Txheej txheem nrhiav qhov ntxiv thaum tsim
Txhawm rau kom ntseeg tau qhov tseeb ntawm qhov chaw ntawm qhov khoob hauv pwm thiab tiv thaiv qhov kev tawm ntawm qhov khoob thaum khoov los ntawm kev tsim cov khoom pov tseg, cov txheej txheem tso qhov qhov yuav tsum tau ntxiv ua ntej thaum tsim, raws li qhia hauv daim duab hauv qab no. Tshwj xeeb tshaj yog rau cov khoom tsim los ntawm ntau yam dabtsi yog khoov, lub qhov txheej txheem yuav tsum tau siv los ua qhov chaw ntsuas qhov ntsuas kom txo tau qhov yuam kev thiab ua kom cov khoom zoo.
9. Thaum kos lub qhov ntev ntawm qhov khoov, xav txog kev tsim khoom
10. Springback ntawm dabtsi yog khoov qhov chaw
Muaj ntau yam cuam tshuam rau lub caij nplooj ntoos hlav, nrog rau cov khoom siv kho tshuab, phab ntsa thickness, khoov vojvoog thiab zoo siab thaum khoov.
(1) Qhov ntau dua qhov sib piv ntawm lub vojvoog sab hauv ntawm qhov dabtsi yog khoov mus rau lub phaj thickness, qhov ntau dua lub springback.
⑵ Piv txwv ntawm txoj hauv kev rau kev txwv tsis pub rov qab los ntawm kev tsim.
Tam sim no, lub springback ntawm dabtsi yog khoov qhov chaw yog tsuas yog zam los ntawm cov chaw tsim tshuaj paus thaum tsim pwm. Nyob rau tib lub sijhawm, qee cov qauv tau txhim kho hauv kev tsim kom txo tau lub kaum sab xis ntawm lub caij nplooj ntoos hlav, raws li qhia hauv daim duab hauv qab no: nias stiffeners nyob rau hauv qhov chaw khoov tsis tau tsuas yog txhim kho lub rigidity ntawm lub workpiece, tab sis kuj yuav pab tswj lub springback.