{"id":807,"date":"2025-01-06T03:24:37","date_gmt":"2025-01-06T03:24:37","guid":{"rendered":"https:\/\/www.ylfastener.com\/?p=807"},"modified":"2025-01-06T03:25:25","modified_gmt":"2025-01-06T03:25:25","slug":"what-is-the-difference-between-a-bolt-with-rolled-threads-and-one-with-cut-threads","status":"publish","type":"post","link":"https:\/\/www.ylfastener.com\/sv\/what-is-the-difference-between-a-bolt-with-rolled-threads-and-one-with-cut-threads\/","title":{"rendered":"Vad \u00e4r skillnaden mellan en bult med rullade g\u00e4ngor och en med skurna g\u00e4ngor?"},"content":{"rendered":"

G\u00e4ngor av ett mekaniskt f\u00e4ste, oavsett om det \u00e4r en\u00a0bult med huvud<\/u>,\u00a0st\u00e5ng<\/u>, eller\u00a0handla inne<\/u>, kan framst\u00e4llas genom antingen sk\u00e4rning eller valsning. Skillnaderna, missuppfattningarna, f\u00f6rdelarna och nackdelarna med varje metod beskrivs nedan.<\/p>\n

Rullade tr\u00e5dar<\/b><\/strong><\/h3>\n

Rullg\u00e4ngning \u00e4r en process genom vilken st\u00e5l extruderas f\u00f6r att bilda den g\u00e4ngade delen av ett f\u00e4stelement, ist\u00e4llet f\u00f6r att avl\u00e4gsnas som vid sk\u00e4rning. I denna process tillverkas en bult av en rund st\u00e5ng med reducerad diameter. Till exempel \u00e4r en bult med en diameter p\u00e5 1 tum tillverkad av en rund st\u00e5ng med en diameter p\u00e5 0,912 tum. Detta material med \"stigningsdiameter\" \u00e4r ungef\u00e4r mittpunkten mellan huvuddiametern (topparna) och mindre diametern (dalarna) p\u00e5 g\u00e4ngorna. Bulten \"rullas\" genom en upps\u00e4ttning g\u00e4ngdynor som f\u00f6rskjuter st\u00e5let och bildar g\u00e4ngorna. Slutresultatet \u00e4r ett f\u00e4stelement med en hel g\u00e4ngad del p\u00e5 1 tum i diameter men en reducerad kroppsdiameter (0,912). Rullg\u00e4ngning \u00e4r en extremt effektiv process och resulterar ofta i betydande kostnadsbesparingar. D\u00e4rf\u00f6r kommer Portland Bolt att rulla tr\u00e5dar n\u00e4r det \u00e4r m\u00f6jligt.<\/p>\n

 <\/p>\n

Tekniskt sett kan alla specifikationer med undantag f\u00f6r A325 och A490 konstruktionsbultar tillverkas med reducerad kropp och rullade g\u00e4ngor.<\/p>\n

 <\/p>\n

En bult med en reducerad kropp kommer att vara svagare \u00e4n en bult med en fullstor kropp.<\/p>\n

Det svagaste omr\u00e5det av alla mekaniska f\u00e4stelement \u00e4r den mindre diametern p\u00e5 g\u00e4ngorna. Eftersom g\u00e4ngm\u00e5tten p\u00e5 en avskuren tr\u00e5d och ett rulltr\u00e5dsf\u00e4ste \u00e4r identiska \u00e4r det absolut ingen skillnad i styrka. Man skulle faktiskt kunna h\u00e4vda att den arbetsh\u00e4rdning som uppst\u00e5r under rulltr\u00e4dningsprocessen till och med kan g\u00f6ra f\u00e4stelementet med rulltr\u00e5dar starkare. Dessutom avbryter sk\u00e4rtr\u00e4dning den naturliga kornstrukturen hos rundst\u00e5ngen medan rullg\u00e4ngning reformerar den. Man kan \u00e5terigen h\u00e4vda att sk\u00e4rning i fibrerna p\u00e5 en rundst\u00e5ng vid sk\u00e4rning av g\u00e4ngning kan ge g\u00e4ngor som har mindre strukturell integritet \u00e4n en del som har rullg\u00e4ngats.<\/p>\n

F\u00f6rdelar med rullg\u00e4ngning<\/i><\/em><\/p>\n

    \n
  1. Betydligt kortare arbetstider inneb\u00e4r l\u00e4gre kostnader.<\/li>\n
  2. Eftersom en rullg\u00e4ngad bult har en mindre kroppsdiameter v\u00e4ger den mindre \u00e4n dess helkropp. Denna viktminskning minskar kostnaderna f\u00f6r st\u00e5l, galvanisering, v\u00e4rmebehandling, pl\u00e4tering, frakt och alla andra kostnader f\u00f6rknippade med f\u00e4stelementet som \u00e4r baserade p\u00e5 vikt.<\/li>\n
  3. Kallbearbetning g\u00f6r tr\u00e5darna mer motst\u00e5ndskraftiga mot skador under hantering.<\/li>\n
  4. Valsade tr\u00e5dar \u00e4r ofta sl\u00e4tare p\u00e5 grund av den polerande effekten av valsningen.<\/li>\n<\/ol>\n

    \u00a0<\/i><\/em><\/p>\n

    Nackdelar med rullg\u00e4ngning<\/i><\/em><\/p>\n

      \n
    1. Tillg\u00e4ngligheten av rundst\u00e5ng med stigningsdiameter \u00e4r begr\u00e4nsad f\u00f6r vissa materialkvaliteter.<\/li>\n<\/ol>\n

      \u00a0<\/i><\/em><\/p>\n

      \u00a0<\/i><\/em><\/p>\n

      Klipp av tr\u00e5dar<\/b><\/strong><\/h3>\n

      Cut threading \u00e4r en process genom vilken st\u00e5l sk\u00e4rs bort, eller fysiskt avl\u00e4gsnas, fr\u00e5n en rund st\u00e5lst\u00e5ng f\u00f6r att bilda g\u00e4ngorna. En bult med en diameter p\u00e5 1 tum tillverkas till exempel genom att sk\u00e4ra av g\u00e4ngor i en hel 1 tums diameter p\u00e5 bulten.<\/p>\n

      F\u00f6rdelar med Cut Threading<\/i><\/em><\/p>\n

        \n
      1. F\u00e5 begr\u00e4nsningar med avseende p\u00e5 diameter och g\u00e4ngl\u00e4ngd.<\/li>\n
      2. Alla specifikationer kan tillverkas med skurna g\u00e4ngor.<\/li>\n<\/ol>\n

         <\/p>\n

        Nackdelar med Cut Threading<\/i><\/em><\/p>\n

        Betydligt l\u00e4ngre arbetstider inneb\u00e4r h\u00f6gre kostnader.<\/p>","protected":false},"excerpt":{"rendered":"

        Threads of a mechanical fastener, regardless of whether it is a\u00a0headed bolt,\u00a0rod, or\u00a0bent bolt, can be produced by either cutting or rolling. The differences, misconceptions, advantages, and disadvantages of each method are described below. Rolled Threads Roll threading is a process by which steel is extruded to form the threaded portion of a fastener, instead [\u2026]<\/p>","protected":false},"author":1,"featured_media":335,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[6],"tags":[],"class_list":["post-807","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-technical"],"acf":[],"yoast_head":"\nWhat is the difference between a bolt with rolled threads and one with cut threads? - HANDAN YANLANG FASTENER CO., LTD<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.ylfastener.com\/sv\/what-is-the-difference-between-a-bolt-with-rolled-threads-and-one-with-cut-threads\/\" \/>\n<meta property=\"og:locale\" content=\"sv_SE\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"What is the difference between a bolt with rolled threads and one with cut threads? - HANDAN YANLANG FASTENER CO., LTD\" \/>\n<meta property=\"og:description\" content=\"Threads of a mechanical fastener, regardless of whether it is a\u00a0headed bolt,\u00a0rod, or\u00a0bent bolt, can be produced by either cutting or rolling. The differences, misconceptions, advantages, and disadvantages of each method are described below. Rolled Threads Roll threading is a process by which steel is extruded to form the threaded portion of a fastener, instead […]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.ylfastener.com\/sv\/what-is-the-difference-between-a-bolt-with-rolled-threads-and-one-with-cut-threads\/\" \/>\n<meta property=\"og:site_name\" content=\"HANDAN YANLANG FASTENER CO., LTD\" \/>\n<meta property=\"article:published_time\" content=\"2025-01-06T03:24:37+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2025-01-06T03:25:25+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.ylfastener.com\/wp-content\/uploads\/2024\/12\/20230220165201267.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"437\" \/>\n\t<meta property=\"og:image:height\" content=\"245\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"admin\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Skriven av\" \/>\n\t<meta name=\"twitter:data1\" content=\"admin\" \/>\n\t<meta name=\"twitter:label2\" content=\"Ber\u00e4knad l\u00e4stid\" \/>\n\t<meta name=\"twitter:data2\" content=\"2 minuter\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/www.ylfastener.com\/what-is-the-difference-between-a-bolt-with-rolled-threads-and-one-with-cut-threads\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/www.ylfastener.com\/what-is-the-difference-between-a-bolt-with-rolled-threads-and-one-with-cut-threads\/\"},\"author\":{\"name\":\"admin\",\"@id\":\"https:\/\/www.ylfastener.com\/#\/schema\/person\/6c326a47e95f6824b65a22ff33f53a9c\"},\"headline\":\"What is the difference between a bolt with rolled threads and one with cut threads?\",\"datePublished\":\"2025-01-06T03:24:37+00:00\",\"dateModified\":\"2025-01-06T03:25:25+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/www.ylfastener.com\/what-is-the-difference-between-a-bolt-with-rolled-threads-and-one-with-cut-threads\/\"},\"wordCount\":502,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\/\/www.ylfastener.com\/#organization\"},\"articleSection\":[\"Technical\"],\"inLanguage\":\"sv-SE\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\/\/www.ylfastener.com\/what-is-the-difference-between-a-bolt-with-rolled-threads-and-one-with-cut-threads\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.ylfastener.com\/what-is-the-difference-between-a-bolt-with-rolled-threads-and-one-with-cut-threads\/\",\"url\":\"https:\/\/www.ylfastener.com\/what-is-the-difference-between-a-bolt-with-rolled-threads-and-one-with-cut-threads\/\",\"name\":\"What is the difference between a bolt with rolled threads and one with cut threads? 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