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发明授权
US07980615B2 Axial member with flange, connection member and production methods thereof 有权
具有法兰，连接构件的轴向构件及其制造方法

Axial member with flange, connection member and production methods thereof
摘要：
A target tubular member with flange, such as a bumper stay, has a flange having an outer diameter larger than the diameter of an axial section and is formed by electromagnetic forming without excessive expansion. The tubular member with flange includes an axial member made of a tubular aluminum alloy extrudate and a flange member joined to an end of the axial member. The axial member has an end flange being integrated at its end and having an area smaller than that of the flange member. The flange member has a hole, and a cylindrical hole flange at the edge of the hole. The axial member fits in the hole of the flange member, the end flange is in intimate contact with the flange member, and the outer periphery of a small-diameter portion of the axial member is in intimate contact with the inner periphery of the hole flange. The hole flange is held between the end flange and a protrusion. The tubular member with flange may be produced by inserting an untreated pipe into the hole of the flange member and expanding the untreated pipe by electromagnetic forming.
摘要（中）：

具有凸缘的目标管状构件（例如保险杠撑杆）具有外径大于轴向部分的直径的凸缘，并且通过电磁成形形成而不会过度膨胀。 具有凸缘的管状构件包括由管状铝合金挤出物制成的轴向构件和连接到轴向构件的端部的凸缘构件。 轴向构件的端部凸缘在其端部成一体，其面积小于凸缘构件的面积。 凸缘构件具有孔，并且在孔的边缘处具有圆柱形孔凸缘。 轴向构件配合在凸缘构件的孔中，端部凸缘与凸缘构件紧密接触，轴向构件的小直径部分的外周与孔凸缘的内周紧密接触 。 孔凸缘保持在端部凸缘和突起之间。 具有凸缘的管状构件可以通过将未处理的管插入凸缘构件的孔中并通过电磁成形来膨胀未处理的管而制造。

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