I-Resistance spot welding iyindlela esetshenziswa kakhulu embonini yokukhiqiza, ikakhulukazi emikhakheni yezimoto kanye ne-aerospace. Ngesikhathi senqubo yokushisela, amandla aphezulu adlula amashidi ensimbi amabili noma ngaphezulu agqagqene, akhiqize ukushisa esibonakalayo. Lokhu kushisa kubangela ukuba insimbi incibilike futhi ihlangane, yakhe ilunga eliqinile. Kodwa-ke, ukushisisa okunamandla kwendawo nakho kubangela ukwanda kokushisa kanye nokuguqulwa okulandelayo ezingxenyeni ezishiselwe.
Ukuqonda kanye nokulinganisa i-thermal expansion deformation ku-resistance spot welding kubalulekile ekuqinisekiseni ikhwalithi nobuqotho bamalunga ashiselwe. Kulesi sihloko, singena ekuhlaziyeni lesi simo nemithelela yaso.
1. Izimbangela Zokuguquguquka Kokwanda Okushisayo
Imbangela eyinhloko yokwanda kokushisa kwe-thermal deformation ekushiseleni indawo yokumelana ukushisa nokupholisa okusheshayo kwezinto ezishiselwe. Lapho i-current isetshenziswa, insimbi ku-weld interface ishisa ngokushesha. Lokhu kushisisa okwasendaweni kubangela ukuthi insimbi yande. Njengoba i-welding current ivaliwe futhi insimbi iphola, iyaqina. Nokho, ngenxa yesimo esisheshayo senqubo, ukufinyela akufani, okuholela ekuguqukeni.
2. Izinto Ezithonya Ukuguquguquka
Kunezici ezimbalwa ezithonya izinga lokunwebeka kokushisa okushisayo:
a. Izinto ezibonakalayo:Izinto ezisetshenziswayo ezihlukene zinama-coefficients ahlukahlukene wokunwetshwa kwe-thermal. Ngakho-ke, ukukhethwa kwezinto ezibonakalayo kungathinta kakhulu ubukhulu be-deformation.
b. I-Welding Yamanje nesikhathi:Ama-welding currents aphakeme kanye nezikhathi zokushisela ezinde zingaholela ekuguquguqukeni okuphawulekayo njengoba kuphumela ekushintsheni okukhulu kwezinga lokushisa.
c. Ubukhulu Bezinto:Izinto eziwugqinsi zinomthamo omkhulu wokunwetshwa kanye nenkontileka, okungase kuholele ekuwohlokeni okubaluleke kakhulu.
d. Idizayini ye-Electrode:Idizayini kanye nezinto zama-electrode welding zingathonya ukusatshalaliswa kokushisa futhi, ngenxa yalokho, ukuguquguquka.
3. Izindlela Zokuhlaziya
Ukuze kuhlaziywe futhi kubikezelwe ukuwohloka kokwanda kokushisa endaweni yokushisela, izindlela ezahlukahlukene zokuhlaziya zingasetshenziswa:
a. I-Finite Element Analysis (FEA):I-FEA ivumela ukumodela kwayo yonke inqubo yokushisela, kucatshangelwa izici ezifana nezakhiwo ezibonakalayo, ukusatshalaliswa kokushisa, nesikhathi. Lokhu kunikeza ukuqonda okuningiliziwe kwamaphethini we-deformation.
b. Ukuhlola Kokulinga:Ukuhlola komhlaba wangempela kungakala ukuwohloka ngokuqondile, kunikeze idatha yobufakazi ukuze kuqinisekiswe futhi kuthuthukiswe amamodeli okuhlaziya.
c. Ukulingisa Kwekhompyutha:Ukulingisa kwekhompyutha, okuhlanganisa izakhiwo zezinto ezibonakalayo kanye nemingcele yokucubungula, kungabikezela imiphumela yokuguquguquka futhi kusize ukuthuthukisa izimo zokushisela.
4. Amasu Okunciphisa
Ukunciphisa ukunwebeka kokushisa kubalulekile ukuze kukhiqizwe amashisela ekhwalithi ephezulu. Amanye amasu okunciphisa i-deformation afaka:
a. Ukushisa ngaphambili:Ukushisa izinto ngaphambi kokushisela kunganciphisa ukuhluka kwezinga lokushisa kanye nokuguqulwa okulandelayo.
b. Ukupholisa okulawulwayo:Ukusebenzisa izindlela zokupholisa ezilawulwayo, ezifana nokwelashwa kokushisa kwangemva kokushisela, kungasiza ukuphatha ukuwohloka.
c. Ukukhetha Okubalulekile:Ukukhetha izinto ezinama-coefficients afanayo okwandisa okushisayo kunganciphisa ukuguquguquka.
d. Ukuthuthukisa Inqubo:Imingcele ye-welding yokulungisa kahle efana nokwakhiwa kwamanje, isikhathi, kanye ne-electrode kunganciphisa ukuthambekela kokuguquguquka.
Sengiphetha, i-thermal expansion deformation iyinselelo engokwemvelo ekushiseleleni indawo yokumelana. Kodwa-ke, ngokuqonda okuphelele kwezimbangela zayo kanye nemiphumela, kanye nokusetshenziswa kwezindlela zokuhlaziya namasu okunciphisa, abakhiqizi bangakhiqiza ama-welds wekhwalithi ephezulu kanye nobuqotho besakhiwo.
Isikhathi sokuthumela: Sep-25-2023
