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1. 发明公开

EP2628555A1 METHOD AND APPARATUS FOR BENDING LONG MEMBER, AND METHOD FOR BENDING DOOR FRAME 有权
标题翻译：方法和装置弯曲细长元件和方法弯曲细长元件
公开(公告)号：EP2628555A1
公开(公告)日：2013-08-21
申请号：EP11832375.7
申请日：2011-09-14
申请人： Shiroki Corporation
发明人： YOSHIHARA, Jiro , TAKAGI, Kazuyuki , MATUBARA, Akinori , MORI, Yuji
IPC分类号： B21D7/06
摘要： A long-member bending method and apparatus, and a door frame bending method are achieved, each of which makes it possible to perform a favorable bending process on long members which vary widely in tensile strength, especially long members which are low in tensile strength.
A method of bending a long member, according to the present invention includes a step of applying a tensile force, which increases from an initial tensile force, to the long member to draw out the long member in a lengthwise direction thereof; a step of measuring a displacement of the long member after commencement of the application of the initial tensile force; and a step of bending the long member by applying a correction tensile force and a bending pressure for bending the long member into a curved shape in the lengthwise direction simultaneously to the long member upon the displacement exceeding a predetermined tensile fracture threshold value within a predetermined period of time or after a lapse of the predetermined period of time without the displacement exceeding the tensile fracture threshold value, wherein the correction tensile force is smaller than the tensile force at the time the displacement exceeds the tensile fracture threshold value or the tensile force at the lapse of the predetermined period of time.
摘要翻译：的长构件的弯曲的方法和装置，和一个门框弯曲方法得以实现，其中的每一个能够在长构件，其在拉伸强度变化很大，爱特别长构件，其是在拉伸强度低执行良好的弯曲加工方法。弯曲长构件gemäß到本发明的方法包括施加拉伸力，该力从初始拉伸力增加，到长构件绘制出在其长度方向长构件的步骤; 测量开始初始拉伸力的施加之后的长构件的位移的步骤; 并且通过施加修正拉伸力弯曲长构件的步骤，和对于长构件同时弯曲为弯曲形状在长度方向上，以在所述位移的长构件的预定时段内超过预定拉伸破坏阈值的弯曲压力的时间或时间没有位移超过所述拉伸破坏阈值的预定时间段的流逝之后，worin校正拉伸力比在位移超过在拉伸破坏阈值或拉伸力的时间拉伸力小的所述预定时间段的流逝。

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