Kulle-kulle masu siffar U sassa ne marasa daidaito waɗanda galibi ake amfani da su don gyara bututu kamar bututun ruwa ko maɓuɓɓugan takarda kamar maɓuɓɓugan ganyen mota. Saboda siffarsa ta siffar U, ana iya haɗa shi da goro, don haka ana kuma kiransa ƙulle-kulle masu siffar U ko ƙulle-kulle masu hawa.
Manyan siffofi na ƙusoshin U sun haɗa da rabin da'ira, kusurwar dama ta murabba'i, alwatika, alwatika mai siffar U da sauransu. Ana iya zaɓar ƙusoshin U masu siffofi daban-daban na kayan aiki, tsayi, diamita da ƙarfinsu bisa ga yanayi da buƙatu daban-daban na amfani.
Yana da amfani iri-iri, galibi ana amfani da shi a gini da shigarwa, haɗa sassan injina, motoci da jiragen ruwa, gadoji, ramuka, layin dogo da sauran fannoni. A kan manyan motoci, ana amfani da ƙusoshin U don daidaita wurin da motar ke tafiya da firam ɗin. Misali, maɓuɓɓugar ganye tana haɗuwa da ƙusoshin U.
Zaɓin maki na Bolt.
Yawanci ana raba ma'aunin ƙugiya zuwa nau'i biyu: ƙugiya mai ƙarfi da ƙugiya ta yau da kullun. Lokacin zabar ma'aunin ƙugiya, yana buƙatar a yi la'akari da shi bisa ga yanayin aikace-aikacen, halayen ƙarfi, kayan aiki da sauransu.
1. Daga mahangar kayan aiki: an yi ƙusoshin ƙarfi masu ƙarfi da kayan aiki masu ƙarfi, kamar ƙarfe 45 #, ƙarfe 40 boron, ƙarfe 20 manganese titanium boron. Yawanci ƙusoshin talakawa ana yin su ne da ƙarfe Q235.
biyu.. Dangane da ƙarfin ƙarfin, ƙusoshin ƙarfi masu ƙarfi da aka fi amfani da su sune 8.8s da 10.9s, wanda 10.9S shine mafi yawan amfani. Ƙarfin ƙusoshin yau da kullun sune 4.4, 4.8, 5.6 da 8.8.
3. Daga mahangar halayen injiniya: ƙusoshin masu ƙarfi suna amfani da ƙarfin kafin tashin hankali kuma suna canja wurin ƙarfin waje ta hanyar gogayya. A gefe guda kuma, haɗin ƙusoshin na yau da kullun ya dogara ne akan juriyar yanke sandar ƙusoshin da matsin lamba akan bangon rami don canja wurin ƙarfin yankewa, kuma ƙarfin kafin tashin hankali yana da ƙanƙanta sosai lokacin da ake matse goro. Saboda haka, ana buƙatar la'akari da halayen injiniya a cikin aikace-aikacen.
4. Daga mahangar amfani: haɗin bel ɗin manyan sassan ginin galibi ana haɗa shi da bel ɗin ƙarfi mai ƙarfi. Ana iya sake amfani da bel ɗin yau da kullun, yayin da ba za a iya sake amfani da bel ɗin ƙarfi mai ƙarfi ba kuma galibi ana amfani da shi don haɗawa na dindindin.
A takaice dai, lokacin zabar takamaiman matsayi da matakin ƙulli na ƙulli mai siffar U, ya kamata mu yi la'akari da kayan aiki, matakin ƙarfi da halayen damuwa na ƙulli bisa ga ainihin buƙata da yanayin amfani, sannan mu zaɓi samfurin da ya dace don cimma tasirin aminci, kwanciyar hankali da aminci.