Ukubala okunembile kokushisa kubalulekile emishinini yokushisela amantongomane ukuze kuqinisekiswe ukuphathwa kahle kokushisa ngesikhathi senqubo yokushisela. Ukuqonda ukushisa okukhiqizwayo nokudluliswayo kubalulekile ekugcineni izimo zokusebenza ezifanele, ukuvimbela ukushisa ngokweqile, nokuqinisekisa ukushiselwa kwekhwalithi ephezulu. Lesi sihloko sihlinzeka ngokuhlaziywa kwamafomula okubala ukushisa asetshenziswa emishinini yokushisela amantongomane, echaza ukubaluleka kwawo kanye nokusetshenziswa kwawo ekunqumeni imingcele yokushisa.
- Ukukhiqiza Ukushisa: Ukukhiqizwa kokushisa emishinini yokushisela amantongomane kwenzeka ngokuyinhloko ngenxa yokumelana nogesi endaweni yokushisela. Ukushisa okukhiqizwayo kungabalwa kusetshenziswa ifomula: Ukushisa (Q) = I^2 * R * t Lapho:
- Q ukushisa okukhiqizwa (ngama-joules noma ama-watts)
- Mina ngingumshini wokushisela (kuma-ampere)
- U-R ukumelana nogesi endaweni yokushisela (ngama-ohms)
- t isikhathi sokushisela (ngemizuzwana)
- Ukudlulisa Ukushisa: Ukushisa okukhiqizwa ngesikhathi sokushisela kufanele kulawulwe ukuvimbela ukushisa ngokweqile. Izibalo zokudlulisa ukushisa zisiza ukucacisa izidingo zokukhipha ukushisa. Ifomula yokudlulisa ukushisa ibandakanya ukucatshangelwa kwezinto ezifana ne-conduction, convection, kanye nemisebe. Ingavezwa njengokuthi: Q = Q_conduction + Q_convection + Q_radiation Lapho:
- I-Q_conduction imele ukushisa okudluliselwa ngokuthintana okuqondile phakathi kwe-workpiece nama-electrode.
- I-Q_convection ilandisa ngokudluliswa kokushisa ngomoya ozungezile noma indawo yokupholisa.
- I-Q_radiation ibhekisela ekudlulisweni kokushisa ngemisebe ye-electromagnetic.
- Izidingo Zokupholisa: Ukugcina amazinga okushisa okusebenza afanelekile, izinga lokukhipha ukushisa kufanele lifane nesilinganiso sokukhiqiza ukushisa. Izidingo zokupholisa zingabalwa kusetshenziswa ifomula: Q_dissipation = Q_generation Lapho:
- I-Q_dissipation izinga lokukhipha ukushisa (ngama-joule ngomzuzwana noma ama-watts)
- I-Q_generation isilinganiso sokukhiqiza ukushisa
Ngokubala ngokunembile ukushisa okukhiqizwayo nokuqonda izindlela zokudlulisa ukushisa, opharetha bangaqinisekisa ukuphathwa kahle kokushisa emishinini yokushisela amantongomane. Lokhu kusiza ukuvimbela ukushisisa kwemishini, kuthuthukise ikhwalithi yokushisela, futhi kuthuthukise ukusebenza kwe-welding kukonke.
Amafomula okubala ukushisa adlala indima ebalulekile ekunqumeni ukukhiqizwa kokushisa, ukudluliswa kokushisa, kanye nezidingo zokupholisa emishinini yokushisela amantongomane. Ngokubala ngokunembile nokuphatha ukushisa, opharetha bangaqinisekisa izimo zokusebenza ezifanele, bavimbele ukushisa ngokweqile, futhi bazuze ukushisela kwekhwalithi ephezulu. Ukuqonda lawa mafomula kuvumela opharetha ukuba benze izinqumo ezinolwazi mayelana nemingcele yokushisela, amasistimu okupholisa, nezindlela zokuqeda ukushisa. Ekugcineni, ukuphathwa kahle kokushisa kuholela ekuthuthukisweni kokusebenza kahle kokushisela, ubude besikhathi semishini enwetshiwe, kanye nokukhiqiza okuthuthukisiwe ezinqubweni zokushisela amantongomane.
Isikhathi sokuthumela: Jul-17-2023
