I-Resistance spot welding yindlela esetyenziswa kakhulu kwishishini lemveliso, ngakumbi kumacandelo eemoto kunye ne-aerospace. Ngethuba lenkqubo ye-welding, i-high current igqithiswa ngamashiti esinyithi amabini okanye ngaphezulu, avelisa ubushushu kwi-interface. Obu bushushu bubangela ukuba intsimbi inyibilike kwaye idibanise, yenze umdibaniso owomeleleyo. Nangona kunjalo, ukufudumeza okunzulu kwendawo kuphinda kubangele ukwanda kwe-thermal kunye nokuguqulwa okulandelayo kumacandelo adibeneyo.
Ukuqonda kunye nokulinganisa ulwandiso lolwandiso lwe-thermal kwindawo yokumelana ne-welding ibalulekile ekuqinisekiseni umgangatho kunye nokuthembeka kwamalungu adityanisiweyo. Kweli nqaku, sihlolisisa uhlalutyo lwale nto kunye neziphumo zayo.
1. Iimbangela zoKwandiswa kweThermal Deformation
Oyena nobangela uphambili wokwandiswa kwe-thermal deformation kwindawo yokumelana ne-welding kukufudumeza ngokukhawuleza kunye nokupholisa izinto ezidibeneyo. Xa umbane usetyenziswa, isinyithi kwi-weld interface sitshisa ngokukhawuleza. Oku kufudumeza kwendawo kubangela ukuba isinyithi sandise. Njengoko i-welding current icinyiwe kwaye intsimbi iphola, inkontileka. Nangona kunjalo, ngenxa yendalo ekhawulezayo yenkqubo, ukunyathela akufani, okukhokelela kwi-deformation.
2. Izinto eziPhembelela uGuquko
Izinto ezininzi zinefuthe kubungakanani bokwandiswa kwe-thermal deformation:
a. Iinkcazelo Ngeempawu zeMathiriyeli:Izinto ezahlukeneyo zinee-coefficients ezahlukeneyo zokwandiswa kwe-thermal. Ngoko ke, ukukhethwa kwezinto eziphathekayo kunokuchaphazela kakhulu ubukhulu be-deformation.
b. I-Welding yangoku kunye nexesha:Imisinga ye-welding ephezulu kunye namaxesha amade e-welding kunokukhokelela kwi-deformation ebaluleke ngakumbi njengoko ikhokelela kutshintsho olukhulu kakhulu lobushushu.
c. Ukutyeba kweMathiriyeli:Izixhobo ezityebileyo zinomthamo omkhulu wokwandisa kunye nekhontrakthi, ezinokukhokelela kuguquko olubaluleke ngakumbi.
d. Uyilo lwe-Electrode:Uyilo kunye nezixhobo ze-welding electrode zinokuchaphazela ukuhanjiswa kobushushu kwaye, ngenxa yoko, i-deformation.
3. Iindlela zokuhlalutya
Ukuhlalutya kwaye uqikelele ulwandiso lolwandiso lwe-thermal kwindawo yokumelana ne-welding, iindlela ezahlukeneyo zokuhlalutya zinokusetyenziswa:
a. Uhlalutyo lweNqanaba eliQinisiweyo (FEA):I-FEA ivumela ukubunjwa kwayo yonke inkqubo ye-welding, iqwalasela izinto ezifana neempahla eziphathekayo, ukusabalalisa ubushushu kunye nexesha. Oku kubonelela ngeenkcukacha ezicacileyo zeepateni zokuguqulwa.
b. Uvavanyo loVavanyo:Uvavanyo lwehlabathi lokwenyani lunokulinganisa i-deformation ngokuthe ngqo, ukubonelela ngedatha esebenzayo yokuqinisekisa kunye nokucokisa iimodeli zohlalutyo.
c. Ukulinganisa kwiKhompyutha:Ukulinganisa ukubala, ukubandakanya iipropathi zezinto eziphathekayo kunye neeparitha zenkqubo, kunokuqikelela iziphumo ze-deformation kunye nokunceda ukwandisa iimeko ze-welding.
4. IziCwangciso zokuNciphisa
Ukunciphisa ukwanda kwe-thermal deformation kubalulekile ekuveliseni iiwelds ezikumgangatho ophezulu. Ezinye izicwangciso zokunciphisa i-deformation ziquka:
a. Ukufudumeza kwangaphambili:Ukutshisa izinto ngaphambi kokuba i-welding inokunciphisa ukuhluka kweqondo lokushisa kunye ne-deformation elandelayo.
b. Ukupholisa okulawulwayo:Ukuphumeza iindlela zokupholisa ezilawulwayo, ezifana nonyango lwe-post-welding heat, lunokunceda ukulawula ukuguqulwa.
c. Ukukhethwa kwezinto:Ukukhetha izinto ezine-coefficients ezifanayo zokwandiswa kwe-thermal kunokunciphisa i-deformation.
d. UPhuculo lweNkqubo:Iiparamitha ze-welding zokulungisa kakuhle njengangoku, ixesha, kunye noyilo lwe-electrode kunokunciphisa utyekelo lokuguqulwa.
Ukuqukumbela, i-thermal expansion deformation ngumceli mngeni okhoyo kwi-resistance spot welding. Nangona kunjalo, ngokuqonda ngokubanzi izizathu kunye nemiphumo yayo, kunye nokusetyenziswa kweendlela zokuhlalutya kunye nezicwangciso zokunciphisa, abavelisi banokuvelisa i-welds yomgangatho ophezulu kunye nokunyaniseka kwesakhiwo.
Ixesha lokuposa: Sep-25-2023
