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1. 发明专利

JP2007260720A Method for forming hole having part for preventing fall-off 有权
标题翻译：用于形成具有防止失效的部件的孔的方法
公开(公告)号：JP2007260720A
公开(公告)日：2007-10-11
申请号：JP2006088757
申请日：2006-03-28
申请人： Chuo Spring Co Ltd , 中央発條株式会社
发明人： SATO TAKEO , SUZUKI HIRONOBU , YAMAMOTO TAKEO
IPC分类号： B21J5/02 , B21D28/16 , B21D28/24
摘要： PROBLEM TO BE SOLVED: To provide a method for easily forming a hole having a part for preventing fall-off functioning so as to prevent fall-off of an inserted member, at a low cost. SOLUTION: The method for forming the hole 20 having the part for preventing fall-off 22, includes a piecing process for forming a blanking hole punching out a work 2 with a punch and also, a projecting part projected to an opening hole edge in the punch-out directional side of the blanking hole on a part of the work 2 in the punch-out direction, and a process for forming the part for preventing fall-off 22 which is projected in the diameter-shrinkage direction of the blanking hole. COPYRIGHT: (C)2008,JPO&INPIT
摘要翻译：要解决的问题：提供一种容易地形成具有用于防止脱落功能的部件以防止插入部件脱落的孔的方法，成本低廉。解决方案：用于形成具有防止脱落部分22的孔20的方法包括用冲头形成用于冲压工件2的冲切孔的接头工艺，以及突出到开口孔的突出部分在打孔方向上的工件2的一部分上的冲切孔的冲出方向侧的边缘，以及用于形成防止脱落部22的工序，该脱落部22在直径收缩方向上突出下料孔。版权所有（C）2008，JPO＆INPIT

2. 发明专利

JP2006272457A Cylindrical member forming method, cylindrical member forming die, and cylindrical member 有权
标题翻译：圆柱形成型方法，圆柱形成型模具和圆柱形构件
公开(公告)号：JP2006272457A
公开(公告)日：2006-10-12
申请号：JP2005100245
申请日：2005-03-30
申请人： Chuo Spring Co Ltd , 中央発條株式会社
发明人： YAMAMOTO TAKEO , SUZUKI HIRONOBU
IPC分类号： B21D5/01
摘要： PROBLEM TO BE SOLVED: To provide a cylindrical member forming method in which production cost is low, and having enough general applicability. SOLUTION: The cylindrical member forming method comprises: a work production stage where a sheet material is subjected to bending, thus an almost cylindrical work 7 provided with an inside diameter side edge part 73 having an inside diameter side edge face 76 at the tip and an outside diameter side edge part 71 having an outside diameter side edge face 75 arranged at the outside diameter side than the inside diameter side edge face 76 at the tip, and in which an interference fit IF appearing upon arranging the inside diameter side edge face 76 and the outside diameter side edge face 75 on almost the same diameter is secured between the inside diameter side edge part 73 and the outside diameter side edge part 71; and a both edge face joining stage where at least either the inside diameter side edge part 73 or the outside diameter side edge part 71 is deformed so as to consume the interference fit IF, thus the inside diameter side edge face 76 and the outside diameter side edge face 75 are butted, and, utilizing springback force based on the consumption of the interference fit IF, the inside diameter side edge face 76 and the outside diameter side edge face 75 are joined, so as to produce a cylindrical member. COPYRIGHT: (C)2007,JPO&INPIT
摘要翻译：要解决的问题：提供一种生产成本低且具有足够一般适用性的圆柱形部件形成方法。解决方案：圆柱形构件形成方法包括：片材受到弯曲的作业生产阶段，因此几乎圆柱形的工件7设置有内径侧边缘部分73，内边缘边缘部分73具有内侧边缘面76 末端和外径侧边缘部分71，其具有布置在外端直径侧的外径侧边缘面75的外侧边缘部分71，该外侧侧边缘部分75在顶端处的内径侧边缘面76布置，并且其中在布置内径侧边缘在内径侧边缘部73和外径侧边缘部71之间，确保面76和外径侧边缘面75几乎相同的直径。以及在内侧侧缘部73或外径侧缘部71中的至少一个变形以消耗过盈配合IF的两个边缘面接合台，从而内侧侧面76和外径侧边缘面75对接，并且利用基于过盈配合IF的消耗的回弹力，内径侧边缘面76和外径侧边缘面75接合，以便制造圆筒形构件。版权所有（C）2007，JPO＆INPIT

3. 发明专利

JP2007075888A Press punching method, press punching die, and spring 审中-公开
标题翻译：新闻打孔方法，新闻打孔和弹簧
公开(公告)号：JP2007075888A
公开(公告)日：2007-03-29
申请号：JP2005270874
申请日：2005-09-16
申请人： Chuo Spring Co Ltd , 中央発條株式会社
发明人： SATO TAKEO , SUZUKI HIRONOBU , YAMAMOTO TAKEO
IPC分类号： B21D28/16 , B21D28/24 , B21D53/00
摘要： PROBLEM TO BE SOLVED: To provide a press punching method in which burrs are hardly generated in a workpiece. SOLUTION: The press punching method comprises a half-blanking step of forming a protruded part W1 by pressing a predetermined part of a workpiece W from one face side of the plate workpiece W and protruding the predetermined part to the other face side opposite to the one face side, a common pushing step of forming a restored part by pushing back the protruded part W1 from the other face side, and a drop-through step of forming a dropped-through part by dropping through the restored part from the other face side. The workpiece W is formed of spring steel. The clearance C1 between a half-blanking punch 36 used for the half-blanking step and a half-blanking die 26 is set to be ≥-10% and ≤-3%, where the thickness t of the workpiece W is defined as 100%. COPYRIGHT: (C)2007,JPO&INPIT
摘要翻译：要解决的问题：提供一种在工件中难以产生毛刺的冲压加工方法。解决方案：冲压冲压方法包括半冲切步骤，通过从板工件W的一个表面侧按压工件W的预定部分形成突出部分W1，并将预定部分突出到相对的另一个面在一个面侧，通过从另一个面侧推回突起部W1来形成恢复部的通常的推压工序，以及通过从另一面向下落入恢复部而形成贯通部的下落工序面对面工件W由弹簧钢制成。将用于半冲切步骤的半冲切冲头36和半冲切模具26之间的间隙C1设定为≥-10％和≤-3％，其中工件W的厚度t定义为100 ％。版权所有（C）2007，JPO＆INPIT

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