Basic Mechanical Properties Muaj feem xyuam rau kev tsim
Nyob rau hauv tag nrho annealed (mos O-state), ntshiab tooj liab nthuav tawm cov khoom zoo tshaj plaws:
Tensile zog: 200-240 MPa
Tawm zog: ~ 70-90 MPa
Elongation (A50mm): 45% -55%
Hardness: 35-60 HV
Reduction of area: >70%
Cov txiaj ntsig no lees paub tias cov tooj liab ntshiab yog mos, tsis muaj zog, thiab deformable heev. Nws tuaj yeem tiv taus cov yas loj loj thaum lub sij hawm stamping thiab kos duab yam tsis muaj kev tawg lossis caj dab. Nws qhov sib piv qis qis ua rau nws yooj yim los pib ntws hauv qab lub zog punch, txo qhov rov qab thiab txhim kho qhov sib xws ntawm qhov sib npaug ntawm qhov chaw stamped.
Stamping Performance ntawm Pure Copper
Ntshiab tooj liab yog ib qho ntawm cov hlau tsim tshaj plaws rau blanking, bending, coining, thiab progressive stamping.
Blanking thiab tho: Tsawg txiav quab yuam yuav tsum tau; smooth shear nto nrog tsawg burr. Cov cuab yeej hnav tsis tshua muaj vim tooj liab yog mos thiab nplaum-abrasive tsuas yog nyob rau hauv lubrication tsis zoo.
Khoov thiab flanging: tuaj yeem ua tiav me me dabtsi yog khoov radii (txog ~ 0.5 × thickness) yam tsis muaj pob txha. Nws qhia tau hais tias yuav luag tsis txias brittleness ntawm chav tsev kub, txhawb nqa ntse bending thiab hemming.
Complex stamping: Haum rau intricate geometry nyob rau hauv kev vam meej tuag. Uniform deformation txo wrinkling thiab tearing piv rau cov alloys muaj zog dua.
Lub ntsiab drawback yog nws softness: qhov chaw yog nquag mus khawb, denting, thiab distortion thaum tuav thiab ejection. Lubrication thiab cov cuab yeej nto tiav yog qhov tseem ceeb rau qhov zoo ntawm qhov chaw.
Sib sib zog nqus Drawing Performance ntawm ntshiab tooj liab
Kev kos duab sib sib zog nqus yog cov txheej txheem uas cov tooj liab ntshiab zoo tshaj plaws.
Txwv tsis pub kos duab piv (LDR): Feem ntau 2.0–2.3 rau daim ntawv annealed, txhais tau tias nws tuaj yeem tsim cov khob sib sib zog nqus hauv ib qho kos.
Kev coj tus cwj pwm deformation: Cov khoom ntws zoo ntawm lub flange mus rau qhov tuag kab noj hniav. High ductility ncua sij hawm localized necking thiab puas ntawm lub punch vojvoog.
Springback: Tsawg heev vim tsis muaj zog tawm los, yog li kos qhov chaw tuav cov duab thiab phab ntsa sib xws.
Thinning: Phab ntsa thickness txo yog nruab nrab thiab kwv yees, txhawb nqa nyias-phab ntsa sib sib zog nqus nqus cov hlab ntsha thiab vaj tse.
Ntshiab tooj liab lub siab thermal conductivity kuj dissipates tshav kub generated thaum lub sij hawm deformation, stabilizing kev sib txhuam thiab tiv thaiv lub zos overheating los yog galling.
Cov teebmeem ntawm Kev Ua Haujlwm Hardening thiab Kev Kho Kub Kub
Ntshiab tooj liab ua hauj lwm hardens me ntsis thaum lub sij hawm txias txias.
Tom qab txias deformation, lub zog nce mus rau 300-350 MPa, thaum elongation poob mus rau 20% -30%.
Tom qab hnyav ua haujlwm txias, lub zog tuaj yeem siab tshaj 400 MPa nrog elongation hauv qab 15%, ua rau kev sib txuas ntxiv nyuaj.
Interstage annealing ntawm 350-500℃tag nrho rov ductility. Kev tsim nyog annealing tshem tawm cov kev ntxhov siab uas seem, ua kom cov nplej zoo dua, thiab ua kom zoo tshaj plaws rau kev kos duab ntau theem. Over-annealing tuaj yeem ua rau cov qoob loo loj hlob thiab me ntsis roughening.
Tswv yim zoo thiab kev txwv
Qhov zoo
Qhov zoo tshaj plaws chav-kub formability rau sib sib zog nqus kos thiab complex stamping
Tsis tshua muaj kev nyuaj siab txo cov xovxwm load thiab tuag kev nyuaj siab
Cov ductility zoo heev txo qhov tawg hauv cov cheeb tsam siab
Low springback txhim kho qhov tseeb qhov tseeb
Zoo nto tiav nrog lubrication zoo
Kev txwv
Tsawg zog txhais tau hais tias qhov chaw tau yooj yim deformed hauv kev tuav
Kev ua hauj lwm nruab nrab hardening yuav tsum tau annealing nyob rau hauv multi-theem txheej txheem
Nws tuaj yeem ua rau khaus ntawm cov cuab yeej yam tsis muaj lubricants
Tsis pom zoo rau cov qauv kev ntxhov siab siab yam tsis muaj kev ntxiv dag zog ntxiv
Cov ntsiab lus
Ntshiab tooj liab, tshwj xeeb tshaj yog nyob rau hauv lub mos annealed temper, yog ib tug hwm cov khoom siv rau stamping thiab sib sib zog nqus daim duab. Nws cov ductility siab, tsis tshua muaj zog, thiab FCC qauv ua rau nws cov yas deformation, ua rau nws haum rau qhov sib sib zog nqus, nyuaj, nyias-phab ntsa. Cov txheej txheem efficiency yog nyob ntawm cov khoom temper, lubrication, tuag tsim, thiab tswj annealing rau counteract ua hauj lwm hardening. Nrog rau qhov tsis zoo, cov tooj liab ntshiab muab cov khoom zoo sib xws, ua haujlwm zoo rau cov khoom siv hluav taws xob, thermal, thiab cov khoom siv zoo nkauj.
