Yintoni eyenza isixhumi singabi nabushushu?
Ngokukodwa, ukumelana nobushushu kuxhomekeke kakhulu kwezi nkalo zintathu zilandelayo:
1. Izinto zokukhusela indlu (iplastiki)
Le "yi-skeleton" yesixhumi, esinoxanduva lokulungisa ii-terminals kunye ne-insulation. Ukumelana kwayo nobushushu kudla ngokulinganiswa yi-Relative Temperature Index (RTI), emele ubushushu apho ukusebenza kwesixhobo kwehla ngama-50% ngaphezulu kweeyure ezili-100,000. Ukukhetha izixhobo ezinexabiso eliphezulu le-RTI kubalulekile ekumelaneni nokuguga kobushushu ixesha elide.
Izinto eziqhelekileyo zeplastiki ezinobushushu obuphezulu ziquka:
I-LCP (iLiquid Crystal Polymer): Inika ukusebenza okungcono kakhulu, kunye nokumelana nobushushu obuphakathi kwama-290°C - 320°C, okusetyenziswa rhoqo kwiindawo ze-SMT okanye kwiindawo zeemoto ezinobushushu obuphezulu.
I-PPS (iPolyphenylene Sulfide): Ukuqina okuphezulu kunye nozinzo olulinganayo, kunye nobushushu obuguquguqukayo obumalunga nama-260°C.
I-Nylon enobushushu obuphezulu (njenge-PA6T, i-PA46): Ilungelelanisa ukuqina kunye nokumelana nobushushu, kunye nokumelana nobushushu obumalunga ne-260°C - 300°C.
I-PBT (iPolybutylene Terephthalate): Ukumelana nobushushu okuqhelekileyo, kunye nokumelana nobushushu obumalunga nama-230°C, okusetyenziswa kakhulu kwizixhobo ze-elektroniki eziqhelekileyo.
2. Izixhobo zeSiteshini sesinyithi (ii-Alloys zeCopper)
Le "yimithambo-luvo" yesixhumi, enoxanduva lokuqhuba umbane. Kumaqondo obushushu aphezulu, iintsimbi eziqhelekileyo zinokukhululeka kuxinzelelo, nto leyo enokubangela ukuncipha kokuguquguquka koqhagamshelwano, okubangela ukuphazamiseka kwesignali okanye ukwanda kokumelana. Ke ngoko, kubalulekile ukukhetha ii-alloys zobhedu ezinokumelana kakhulu nokunciphisa uxinzelelo.
I-Beryllium Copper: Ithambile kakhulu, iyamelana nokudinwa okuphezulu kunye nokumelana nobushushu xa ithelekiswa ne-bronze, nto leyo eyenza ukuba ibe lolona khetho lufanelekileyo lokusetyenziswa ngokuthembeka okuphezulu, kumaqondo obushushu abanzi.
I-Phosphor Bronze: Inzima kune-bronze, iyakwazi ukugcina ukuthamba ixesha elide, isetyenziswa kakhulu kwiimeko apho ubushushu bokusebenza bungaphantsi kwama-300°F (malunga ne-149°C).
3. Uyilo loLwakhiwo loLawulo loBushushu ngokubanzi
Le yinkqubo "yokulawula ubushushu" yesixhumi. Ubushushu beJoule obuveliswa ngumsinga ngumthombo ophambili wokunyuka kobushushu bangaphakathi, kwaye isakhiwo esilungileyo sinokususa ubushushu ngempumelelo, sithintele ubushushu bangaphakathi ukuba bungabi phezulu kakhulu.
Uyilo olukhulu lwesithuba: Ukwandisa umgama ophakathi kwee-terminals kunceda ekuchitheni ubushushu ngokusebenzisa i-convection yomoya.
Ulwakhiwo lokusasaza ubushushu: Ezinye izihlanganisi zezithuthi ezinamandla aphezulu okanye ezintsha zamandla zisebenzisa isingxobo sesinyithi okanye izinki zobushushu, zisebenzisa ukuhanjiswa kunye nokuhanjiswa kwegesi ukuhambisa ubushushu.
Ukumelana nobushushu kwesixhumi sisiphumo sesiphumo esidibeneyo sezixhobo kunye nesakhiwo:
Iplastiki sisiseko: imisela ubushushu obuphezulu bokusingqongileyo obunokumelana nesixhumi (umzekelo, ukuba singamelana na nokunyibilika kwe-solder yobushushu obuphezulu).
Isinyithi sisisiseko: simisela ukuba isixhumi singagcina unxibelelwano olunokuthenjwa lwe-elastiki phantsi kweemeko zombane oshushu kakhulu ixesha elide.
Ulwakhiwo lubalulekile: lumisela isantya sokuqokelelwa kobushushu bangaphakathi, ekugqibeleni luchaphazela ubushushu bokwenyani bokusebenza.