Ithusi le-beryllium linokumelana okuphansi, ukuqhutshwa kwe-thermal okuphezulu kanye ne-coefficient yokunwetshwa kunensimbi.Sekukonke, ithusi le-beryllium linamandla afanayo noma aphezulu kunensimbi.Uma usebenzisa i-resistance spot welding (RSW) i-beryllium yethusi ngokwayo noma ithusi le-beryllium namanye ama-alloys, sebenzisa i-welding current ephezulu, (15%), i-voltage ephansi (75%) kanye nesikhathi esifushane sokushisela (50%) .I-Beryllium yethusi imelana nokucindezela okuphezulu kwe-welding kunamanye ama-alloys ethusi, kodwa izinkinga zingabangelwa ukucindezela okuphansi kakhulu.
Ukuze uthole imiphumela engaguquki kuma-alloys ethusi, imishini yokushisela kufanele ikwazi ukulawula ngokunembile isikhathi nesikhathi samanje, futhi imishini yokushisela ye-AC ikhethwa ngenxa yokushisa kwayo okuphansi kwe-electrode kanye nezindleko eziphansi.Izikhathi zokushisela zemijikelezo engu-4-8 zikhiqize imiphumela engcono.Lapho ushisela izinsimbi ezinama-coefficients afanayo wokunweba, i-welding etshekile kanye ne-overcurrent welding ingalawula ukunwetshwa kwensimbi ukukhawulela ingozi efihliwe yokuqhekeka kokushisela.I-Beryllium yethusi namanye ama-alloys ethusi ashiselwe ngaphandle kokutsheka nokushisela ngokweqile.Uma kusetshenziswa i-welding ethambekele kanye ne-overcurrent welding, inani lezikhathi lincike ekugqineni kwe-workpiece.
Endaweni yokumelana nokushisela i-beryllium yethusi nensimbi, noma amanye ama-alloys aqinile, ibhalansi engcono yokushisa ingatholwa ngokusebenzisa ama-electrode anezindawo ezincane zokuthintana ngasohlangothini lwethusi lwe-beryllium.Izinto ze-electrode ezithintana ne-beryllium yethusi kufanele zibe ne-conductivity ephakeme kune-workpiece, i-electrode yebanga leqembu le-RWMA2 ifanelekile.Ama-electrode ensimbi aphikisayo (i-tungsten ne-molybdenum) anamaphuzu aphezulu kakhulu ancibilika.Akukho ukuthambekela kokunamathela ku-beryllium yethusi.Ama-electrode angu-13 no-14 ayatholakala.Inzuzo yezinsimbi eziphikisayo impilo yabo ende yesevisi.Kodwa-ke, ngenxa yokuqina kwama-alloys anjalo, umonakalo ongaphezulu kungenzeka.Ama-electrode apholile ngamanzi azosiza ukulawula izinga lokushisa lethiphu futhi andise impilo yama-electrode.Nokho, lapho kushiselwa izingxenye ezacile kakhulu zethusi i-beryllium, ukusetshenziswa kwama-electrode apholise amanzi kungase kuphumele ekucimeni kwensimbi.
Uma umehluko wokujiya phakathi kwethusi le-beryllium kanye nengxubevange ephezulu ye-resistivity mkhulu kuno-5, i-projection welding kufanele isetshenziswe ngenxa yobunzima bebhalansi yokushisa engenzeka.
I-Resistance projection welding
Izinkinga eziningi ze-beryllium yethusi ekushiseleni indawo yokumelana zingaxazululwa nge-resistance projection welding (RPW).Ngenxa yendawo yayo encane ethintekile ukushisa, imisebenzi eminingi ingenziwa.Izinsimbi ezihlukene zobukhulu obuhlukene kulula ukuzishisela.Ama-electrode abanzi ahlukene kanye nokubunjwa kwama-electrode ahlukahlukene asetshenziswa ekushiseleni kokuqagela ukuze kuncishiswe ukuwohloka nokunamathela.I-electrode conductivity ayiyona inkinga kunasekushiseleleni indawo yokumelana.Okuvame ukusetshenziswa ama-electrodes angu-2, 3, no-4;lapho i-electrode iqina, ukuphila isikhathi eside.
Ama-alloys ethusi athambile awangeni ekushiselweni kwe-resistance projection, ithusi le-beryllium liqine ngokwanele ukuvimbela ukuqhekeka kwe-bump ngaphambi kwesikhathi futhi linikeze ukushisela okuphelele kakhulu.Ithusi le-beryllium lingabuye libe yi-projection eshiselwe ebugqileni obungaphansi kuka-0.25mm.Njenge-resistance spot welding, imishini ye-AC ivame ukusetshenziswa.
Lapho i-soldering izinsimbi ezihlukene, ama-bumps atholakala kuma-alloys aphezulu.I-Beryllium yethusi ithambile ngokwanele ukuthi ingashaya noma ikhiphe cishe noma yikuphi ukuma kwe-convex.Kubandakanya izimo ezibukhali kakhulu.I-workpiece yethusi ye-beryllium kufanele yakhiwe ngaphambi kokwelashwa kokushisa ukuze kugwenywe ukuqhekeka.
Njenge-resistance spot welding, izinqubo zokushisela ze-beryllium zethusi zidinga i-amperage ephezulu.Amandla kufanele asetshenziswe khona manjalo futhi aphakame ngokwanele ukuze enze ukuthi i-protrusion incibilike ngaphambi kokuba iqhekeke.Ingcindezi yokushisela nesikhathi kuyalungiswa ukuze kulawulwe ukuphuka kwamaqhubu.Ingcindezi yokushisela nesikhathi nakho kuncike ku-bump geometry.Ingcindezi yokuqhuma izonciphisa amaphutha e-weld ngaphambi nangemva kokushisela.