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    • 3. 发明专利
    • Twist forward extruding device and twist forward extruding method
    • TWIST FORWARD EXTRUDING DEVICE AND TWIST FORWARD EXTRUDING METHOD
    • JP2009090359A
    • 2009-04-30
    • JP2007265751
    • 2007-10-11
    • Osaka Prefecture Univ公立大学法人大阪府立大学
    • MIZUNUMA SUSUMUTAKATSU MASAHIDE
    • B21C23/21B21C23/00B21C23/14B21C25/02
    • PROBLEM TO BE SOLVED: To provide a device and a method for reducing extruding load by efficiently applying twisting strain in a twist forward extrusion by which the internal structure of a material is fined by applying the large twisting strain to a solid material and powdery material such as metal and high polymer.
      SOLUTION: In the twist forward extruding device into which the material 1 charged into a cylindrical container 3 is pushed with a pusher 4, one side of the container 3 or a cylindrical die 2 is fixed in the rotational direction so as not to be rotated and the other end is rotated around the axis of extrusion, the die 2 is a two-step die which is composed of an inlet-side die part 2-2 and an outlet-side die part 2-3, a size which completely includes the cross section of the material 1 which is compactly charged in the container 3 and is the non-circular shape-dimension, also the inlet-side cross section of the die hole of the outlet-side die part 2-3 completely includes the outlet-side cross section of the die hole of the inlet-side die part 2-2 and is smaller shape-dimension than the cross section of the material 1 in the container 3.
      COPYRIGHT: (C)2009,JPO&INPIT
    • 解决的问题:提供一种通过在扭转向前挤压中有效地施加扭转应变来提供减小挤压负载的装置和方法,通过将扭曲应变施加到固体材料上,材料的内部结构被精细化, 粉末状材料如金属和高分子聚合物。 解决方案:在推进器4中推入装入圆筒形容器3的材料1的扭转挤出装置中,容器3的一侧或圆柱形模具2沿旋转方向固定,以不 旋转,另一端围绕挤出轴线旋转,模具2是由入口侧模具部件2-2和出口侧模具部件2-3构成的两步模具,其尺寸 完全包括紧凑地装入容器3中的材料1的横截面并且是非圆形形状尺寸,出口侧模具部分2-3的模孔的入口侧横截面也完全包括 入口侧模具部2-2的模孔的出口侧截面形状尺寸小于容器3中的材料1的截面尺寸。(C)2009,JPO&INPIT
    • 5. 发明专利
    • Twist forward extruding method and twist forward extruding apparatus
    • TWIST FORWARD EXTRUDING METHOD AND TWIST FORWARD EXTRUDING APPARATUS
    • JP2009107019A
    • 2009-05-21
    • JP2008264311
    • 2008-10-10
    • Osaka Prefecture Univ公立大学法人大阪府立大学
    • TAKATSU MASAHIDEMIZUNUMA SUSUMU
    • B21C23/00B21C25/02B21C29/00
    • PROBLEM TO BE SOLVED: To provide a twist forward extruding method and a twist forward extruding apparatus by which extrusion at a low pressure is made possible by friction stirring and which is suitable to the production of a large size fine particle bulk material by which crystal grain is made finer at a breath by a single continuous process.
      SOLUTION: In this twist forward extruding method, after charging a billet B of a bar-like solid metal material into the charging hole of a cylindrical container 1 and when a die 2 and the billet B are relatively rotated around the extruding axis P of a pusher 3 while pressurizing the billet B with the pusher 3 toward a cylindrical die 2 which is arranged adjacently to the container 1, the pushing-in pressure of the pusher 3 and the rotational speed of the relative rotation are set to the thrusting pressure and the rotational speed so that plastic flow is generated on one end by generating frictional force and frictional heat between the one end of the billet B and the inside surface of the die hole by sliding them while bringing the one end of the billet B into contact with the inside surface of the die hole and the twist extrusion of the billet B is performed by imparting twisting shear strain while making the plastic flow continue to the side of the other end of the billet B.
      COPYRIGHT: (C)2009,JPO&INPIT
    • 要解决的问题:提供一种向前挤压方法和一种通过摩擦搅拌使低压挤出成形的扭转向前挤压装置,其适用于通过以下方式生产大尺寸细颗粒散装材料: 通过单个连续过程,使得晶体在呼吸中变得更细。 解决方案:在这种向前挤压方法中,将棒状固体金属材料坯料B装入圆筒形容器1的充填孔中,并且当模具2和坯料B围绕挤出轴线相对旋转时 P,同时用推动器3将坯料B加压到与容器1相邻设置的圆柱形模具2上,推动器3的推入压力和相对旋转的转速被设定为推力 压力和转速使得在一端产生塑性流动,通过在坯料B的一端与模具孔的内表面之间产生摩擦力和摩擦热,同时使坯料B的一端进入 与模具孔的内表面接触,并且通过施加扭转剪应变同时使塑性流动继续到坯料B的另一端侧进行坯料B的扭曲挤压。 OPYRIGHT:(C)2009,JPO&INPIT