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    • 3. 发明专利
    • Method for manufacturing double-threaded screw bolt
    • 制造双螺纹螺栓螺栓的方法
    • JP2007229760A
    • 2007-09-13
    • JP2006054086
    • 2006-02-28
    • Daiki Kogyo KkSaga Tekkohsho Co LtdSaga UnivSagaken Chiiki Sangyo Shien Center国立大学法人佐賀大学大喜工業株式会社株式会社佐賀鉄工所財団法人佐賀県地域産業支援センター
    • NISHIDA SHINICHIHATTORI SHINSUKENODA HIDEKISAITO KINJIROEGASHIRA HIROYUKIMOTOYAMA YOSHIHIRO
    • B21H3/06F16B35/00F16B39/30
    • PROBLEM TO BE SOLVED: To provide a method for manufacturing a double-threaded screw bolt with which the bolt suitable to dimensional standards of ISO, JIS, etc., can be manufactured at high product yield, can be mass-produced with high production stability at a low cost, while the obtained double-threaded screw bolt can smoothly be screwed to a coarse-thread nut and a fine thread nut standardized by ISO, JIS, etc., and the double-threaded screw bolt excellent in usability can be manufactured.
      SOLUTION: The method for manufacturing the double-threaded screw bolt having a standardized coarse-threaded screw part formed from the tip end part to a prescribed part of a bolt-shaft part and having a pitch P and outer diameter d, and a standardized fine-threaded screw part formed by superposing at least the whole length as the above coarse-threaded screw part in the above bolt-shaft part or by superposing from the tip end part to the prescribed part of the above coarse-threaded screw part on the above coarse-threaded screw part and having a pitch p(p=P/n, n is 1.5 to 3), includes thread-rolling the bolt material of an outer diameter D=0.875×(1±0.03)d while pressing the bolt material to a thread-rolling die.
      COPYRIGHT: (C)2007,JPO&INPIT
    • 要解决的问题:提供一种双螺杆螺栓的制造方法,通过该方法可以以高产率制造符合ISO,JIS等尺寸标准的螺栓,可以批量生产 高成本的生产稳定性好,而所得到的双螺纹螺栓可以顺利地拧紧到粗螺纹螺母和由ISO,JIS等标准化的细螺纹螺母,并且可用性优异的双螺纹螺栓 可以制造。 解决方案:用于制造具有标准化的粗螺纹螺纹部分的双螺纹螺栓的方法,该粗螺纹螺纹部分由螺栓轴部分的前端部分到规定部分形成,具有节距P和外径d,以及 通过将至少整个长度作为上述粗螺纹部分叠加在上述螺栓轴部分中或通过从顶端部分叠加到上述粗螺纹部分的规定部分而形成的标准化的细螺纹部分 在上述粗螺纹部上,具有间距p(p = P / n,n为1.5〜3),包括在压制时对外径D = 0.875×(1±0.03)d的螺栓材料进行螺纹轧制 螺栓材料到一个滚丝模具。 版权所有(C)2007,JPO&INPIT