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    • 2. 发明专利
    • Method for bending magnesium-based pipe
    • 用于弯曲镁基管的方法
    • JP2013081988A
    • 2013-05-09
    • JP2011223915
    • 2011-10-11
    • Fuji Seiko Kkフジ精工株式会社
    • SAKAI KEIJIROFUJITA OSAMU
    • B21D9/00B21D7/025B21D9/03
    • PROBLEM TO BE SOLVED: To solve a problem wherein a magnesium material is known to be inferior in plastic workability at an ordinary temperature and it is presumed that pre-annealing and warm working would be required when the magnesium material is formed into a pipe and the pipe is to be bent, but since the magnesium material is easily oxidized, it may be undesirable to carry out such heat treatment depending on the purpose of the pipe.SOLUTION: The bent part of the pipe 1 formed of the magnesium material is formed in double pipe structure with an inner pipe 5 inserted in an outer pipe 3. The inner pipe 5 is formed in elliptic shape, and its outer surface in the major axis direction is in pressure contact with the inner surface of the outer pipe 3. The pipe 1 is bent by a rotary draw-bending type apparatus. At this time, bending is performed by making a position adjustment so that one pressure contact side comes to a bent inside part. In this method, the pipe formed of the magnesium material can be bent without heat treatment up to a certain degree of bend radius.
    • 解决的问题:为了解决在常温下,镁材料的塑性加工性差的问题,推测当将镁材料形成为一种时,需要进行预退火和热加工 管子和管子将被弯曲,但是由于镁材料容易氧化,所以根据管道的目的进行这种热处理可能是不希望的。 解决方案:由镁材料形成的管1的弯曲部分形成为双管结构,内管5插入外管3中。内管5形成为椭圆形,其外表面 长轴方向与外管3的内表面压力接触。管1由旋转拉弯型装置弯曲。 此时,通过进行位置调整使得一个压力接触侧到达弯曲的内部部分来进行弯曲。 在这种方法中,由镁材料形成的管可以弯曲而不进行热处理直到一定的弯曲半径。 版权所有(C)2013,JPO&INPIT
    • 4. 发明专利
    • Method of bending electric resistance welded steel tube
    • 弯曲电阻焊钢管的方法
    • JP2009183983A
    • 2009-08-20
    • JP2008027185
    • 2008-02-07
    • Jfe Steel CorpJfeスチール株式会社
    • MASUKO MAMORU
    • B21D7/025B21D9/03
    • PROBLEM TO BE SOLVED: To provide a method of bending an electric resistance welded steel tube by which the life of a working tool of a rotating and pull-bending apparatus is prolonged in the working of the electric resistance welded steel tube having a stage for bending the electric resistance welded tube and a stage for expanding a tube end succeeding to the stage for bending.
      SOLUTION: When bending the electric resistance welded tube p by a rotating and pull-bending apparatus, a rotating and pull-bending apparatus 8 on the surface of which relieving grooves 9 in which the bead part of the electric resistance welded steel tube p is housed are formed on the surface of the working tool 1 on the inside of bending and the surface of a ball mandrel 5 is used.
      COPYRIGHT: (C)2009,JPO&INPIT
    • 要解决的问题:提供一种弯曲电阻焊钢管的方法,其中在具有下述特征的电阻焊钢管的加工中延长了旋转和拉弯装置的加工工具的寿命 用于弯曲电阻焊管的阶段和用于在弯曲阶段之后扩展管端的台。 解决方案:当通过旋转和拉弯装置弯曲电阻焊管p时,在其表面上的旋转和拉弯装置8的缓冲槽9,其中电阻焊钢管的胎圈部分 p被容纳在工作工具1的弯曲内侧的表面上,并且使用球心轴5的表面。 版权所有(C)2009,JPO&INPIT
    • 10. 发明专利
    • MANDREL FOR TUBE BENDER
    • JP2001232421A
    • 2001-08-28
    • JP2000043109
    • 2000-02-21
    • TOYOTA MOTOR CORPTAIHO SEIKI CO LTDFUJI WORLD KK
    • IZUMI AKIRAOSHIMA HIROYOSHITANOUE TAKESHI
    • B21D9/03
    • PROBLEM TO BE SOLVED: To provide a mandrel for a tube bender suffering a reduced change in a cross sectional shape in bending. SOLUTION: The mandrel for a tube bender in which mandrel pieces having an outer peripheral face of a prescribed width corresponding to a tube inner peripheral face to be bent, a bearing arranged to one end side in the axial direction and an object to be supported by a bearing arranged to the other end in the axial direction are engaged with each other by an adjacent bearing and object to be supported and the mandrel pieces are connected in a freely undulating way is inserted into the inside of a bending part of the tube so as to prevent a cross section of the tube from deforming. One end side part of the outer peripheral face of the mandrel piece in the axial direction is made to a spherical face located at a prescribed radius from an undulation center of the bearing and the object to be supported engaging each other, and the other end of the mandrel piece in the axial direction has a recessed part into which one end side part of the spherical face of the adjacent mandrel piece can enter. The tube bender mandrel has an effect to increase the dimensional precision of a tube to be bent.