Faɗaɗa bututun bututun ƙarfe mai amfani da na'ura ...

Lokacin faɗaɗa bututun, da farko a shafa ƙarshen bututun tagulla mai walƙiya sannan a saka shi a lebur da fayil, sannan a sanya bututun tagulla a cikin maƙallin diamita na bututun da ya dace, a matse goro mai ɗaurewa a kan maƙallin, sannan a matse bututun tagulla sosai. Lokacin faɗaɗa bakin kararrawa, bakin bututun dole ne ya fi saman maƙallin, kuma tsayinsa ya ɗan fi tsayin chamber na ramin maƙallin. Sannan, a matse kan maƙallin a kan sukurin matsewa na sama na firam ɗin baka, a gyara firam ɗin baka a kan maƙallin, sannan a yi kan maƙallin da tsakiyar bututun tagulla a kan layi ɗaya. Sannan, a juya maƙallin a saman maƙallin maƙallin a hannun agogo don sanya kan maƙallin a bakin bututun. A matse sukurin daidai kuma a hankali. A juya kan maƙallin a ƙasa don juyawa 3/4, sannan a juya don juyawa 1/4. A maimaita wannan tsari kuma a hankali a faɗaɗa bututun zuwa bakin kararrawa. Lokacin da ake matse sukurin, a yi hankali kada a yi amfani da ƙarfi fiye da kima don guje wa fashe bangon gefen bututun tagulla. Lokacin faɗaɗa bakin kararrawa, shafa ɗan man sanyi a kan kan mazugi don sauƙaƙa shafa man bakin kararrawa. A ƙarshe, bakin kararrawa da aka faɗaɗa ya zama zagaye, santsi kuma babu tsagewa. Lokacin faɗaɗa bakin mai siffar kofin, maƙullin dole ne ya danne bututun jan ƙarfe sosai, in ba haka ba bututun jan ƙarfe yana da sauƙin sassautawa kuma yana motsawa baya yayin faɗaɗawa, wanda ke haifar da rashin isasshen zurfin bakin mai siffar kofin. Tsawon bututun da aka fallasa a saman maƙulli zai zama ya fi girma 1-3mm fiye da diamita na bututu. Jerin kawunan faɗaɗa da aka daidaita da mai faɗaɗa bututu an samar da su don zurfin walƙiya da kuma share diamita daban-daban na bututu. Gabaɗaya, tsawon faɗaɗa bututun da bai wuce 10mm ba shine kusan 6-10mm, kuma sharewa shine 0.06-o 10mm. Lokacin faɗaɗawa, kawai sai a gyara kan faɗaɗawa wanda ya yi daidai da diamita na bututun a kan sukurin matsewa na saman firam ɗin baka, sannan a gyara firam ɗin baka sannan a matse sukurin a hankali. Hanyar aiki ta musamman iri ɗaya ce da lokacin faɗaɗa bakin kararrawa.