Kuwunika kwa Electrical Resistivity mu Medium Frequency Inverter Spot Welding Machines

Kulimbana ndi magetsi ndi gawo lofunikira pamakina owotcherera ma frequency inverter spot, chifukwa amatsimikizira kuthekera kwazinthu kukana kuyenda kwamagetsi. Nkhaniyi ikufuna kusanthula lingaliro la mphamvu yamagetsi yamagetsi ndi kufunikira kwake pokhudzana ndi ntchito zowotcherera mawanga pogwiritsa ntchito makina apakati a frequency inverter.

1. Kumvetsetsa Kukaniza Kwamagetsi: Kukaniza kwamagetsi, komwe kumadziwika ndi chizindikiro ρ (rho), ndi chinthu chakuthupi chomwe chimatsimikizira kukana kwake kukuyenda kwamagetsi. Zimatanthauzidwa ngati chiŵerengero cha gawo lamagetsi lomwe limagwiritsidwa ntchito kudutsa zinthu zomwe zimachokera ku mphamvu yamagetsi yamagetsi. Kukaniza kumayesedwa ndi mayunitsi a ohm-mita (Ω·m) kapena ohm-centimita (Ω·cm).
2. Kufunika kwa Kukaniza Magetsi mu Spot Welding: M'makina owotcherera ma frequency a frequency inverter spot, kumvetsetsa mphamvu yamagetsi yamagetsi pazida zogwirira ntchito ndikofunikira pazifukwa zingapo: a. Kusankha Kwazinthu: Zida zosiyanasiyana zimakhala ndi mphamvu zosiyanasiyana zamagetsi, zomwe zimatha kukhudza momwe kuwotcherera. Kusankha zida zokhala ndi ma resistivities ogwirizana kumapangitsa kuti pakhale kuyenda bwino komanso kutentha kwabwino panthawi yowotcherera. b. Kutentha kwa Joule: Kuwotcherera kwa Spot kumadalira kusintha kwa mphamvu yamagetsi kukhala kutentha kudzera mu kutentha kwamphamvu. The resistivity wa zipangizo workpiece amatsimikizira kuchuluka kwa kutentha kwapangidwa pa kuwotcherera mfundo, mwachindunji kukopa weld khalidwe ndi mphamvu. c. Kugawa Kutentha: Kusiyanasiyana kwa resistivity kungayambitse kutentha kosafanana panthawi yowotcherera. Zipangizo zokhala ndi zotsutsana zosiyanasiyana zimatha kuwonetsa kutentha kosagwirizana, zomwe zimakhudza kukula ndi mawonekedwe a weld nugget komanso zomwe zingasokoneze kukhulupirika kwa mgwirizano. d. Contact Resistance: Kulimbana kwamagetsi pamagetsi a electrode-workpiece kumakhudza kukana kukhudzana. Kulimbana kwakukulu kungapangitse kuwonjezereka kwa kukhudzana, zomwe zimakhudza kusamutsidwa kwamakono ndi kupanga kutentha.
3. Zomwe Zimakhudza Kukana Kwamagetsi: Zinthu zingapo zimakhudza mphamvu yamagetsi yazinthu zomwe zimagwiritsidwa ntchito powotcherera malo: a. Mapangidwe Azinthu: Zomwe zimapangidwira komanso zodetsa zazinthuzo zimakhudza kwambiri kusakhazikika kwake. Zida zokhala ndi milingo yoyipa kwambiri nthawi zambiri zimawonetsa kukana kwambiri. b. Kutentha: Kulimbana ndi magetsi kumadalira kutentha, ndi zipangizo zambiri zomwe zimasonyeza kuwonjezeka kwa resistivity pamene kutentha kumakwera. Choncho, m'pofunika kuganizira kutentha kwa ntchito powotcherera malo kuti muwone bwinobwino zotsatira za resistivity. c. Kapangidwe ka Mbewu: Mapangidwe ambewu ndi makonzedwe a crystalline azinthu amatha kusokoneza mphamvu zawo zamagetsi. Zipangizo zokongoletsedwa bwino nthawi zambiri zimawonetsa kutsika kwamphamvu kuposa zida zomangira. d. Alloying Elements: Kuphatikizika kwa ma alloying zinthu kumatha kusintha mphamvu yamagetsi yamagetsi. Mitundu yosiyanasiyana ya alloy imatha kupangitsa kuti pakhale milingo yosiyanasiyana ya resistivity, kukhudza momwe kuwotcherera.

Kumvetsetsa lingaliro la resistivity magetsi ndi kufunikira kwake pamakina apakati pafupipafupi inverter spot kuwotcherera ndikofunikira kuti mukwaniritse bwino komanso magwiridwe antchito. Poganizira za resistivity magetsi a workpiece zipangizo, opanga akhoza kusankha zipangizo zoyenera, kulamulira kutentha kugawa, kuchepetsa kukhudzana kukana, ndi kuonetsetsa imayenera otaya panopa pa ndondomeko kuwotcherera. Kudziwa izi kumathandizira kupanga ndi kugwiritsa ntchito kachitidwe kawotcherera malo, komwe kumatsogolera ku ma welds odalirika komanso apamwamba pamafakitale osiyanasiyana.