Mukuita welding yeyepakati frequency spot welder, kupikisa kunoumbwa nekupokana kwekubata pakati pemawelds, kusangana kwekupokana pakati pemaelectrodes uye welds uye kuramba kwemaweld pachawo. Sezvo kutonhora kunowedzera, ukuru hwekupikisa huri kuramba huchichinja.
Munguva yewelding, mutsauko wekumanikidzwa kwe electrode, zvazvino uye zvinhu zvekusungirirwa zvese zvinokanganisa shanduko yekuramba. Kana zvinhu zvakasiyana zvesimbi zvakasungwa, simba rekudzivirira rinoshanduka zvakasiyana. Pakutanga kwekutsvaira, simbi iri munzvimbo yewelding haina kunyungudutswa asi inotungidzirwa, uye kushorwa kwekubatana kunodonha nekukurumidza. Sezvo tembiricha inowedzera, iyo resistivity inowedzera, nepo kushorwa kunoderera nekuda kwekuwedzera kwenzvimbo yekubatana inokonzerwa nekupisa, uko kuwedzera kweresistive kunonyanya kutonga, saka curve inokwira.
Kana tembiricha yasvika pakukosha kwakakosha, kukura kweresistive kunodzikira uye iyo yakasimba inova mvura. Nekuda kwekuwedzera kwenzvimbo yekusangana nekuda kwekudziya kunyorova, kushorwa kunoderera, saka curve inoderera zvakare. Chekupedzisira, nekuti tembiricha yemunda uye yazvino munda zvinopinda mune yakatsiga mamiriro, iyo ine simba kuramba inogara yakagadzikana.
Kubva pakuona kwedata rekupikisa, shanduko kubva pa180μΩ pakutanga kwewelding kusvika kune 100μΩ pamagumo yakakura kwazvo. Muchidzidzo, iyo dynamic resistance curve inongoenderana nechinhu, uye ine universal properties. Zvisinei, mukutonga chaiko, nokuti kupikisa kwakaoma kuona, zvakaoma kudzora maererano nekuchinja kwekupikisa. Kuonekwa kwewelding ikozvino kwakareruka, kana iyo dynamic resistance curve ikashandurwa kuita dynamic current curve, zviri nyore kuita. Kunyangwe iyo dynamic current curve ine chekuita nesimba uye mutoro hunhu hwepakati frequency spot welder, kana mamiriro ehardware (intermediate frequency spot welder) ari echokwadi, dynamic current curve uye dynamic resistance curve ine mitemo inoenderana.
Nguva yekutumira: Zvita-04-2023
