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1. 发明公开

EP3059025A4 SPRING FORMING DEVICE AND FORMING METHOD 有权转让
标题翻译： FEDERHERSTELLUNGSVORRICHTUNG UND VERFAHREN ZUR HERSTELLUNG
公开(公告)号：EP3059025A4
公开(公告)日：2017-06-28
申请号：EP14854805
申请日：2014-10-08
申请人： NHK SPRING CO LTD
发明人： TAKAHASHI KEITA , SHIRAISHI TOHRU , ONO YUICHIRO , NAGASAWA KAORU
IPC分类号： B21F35/00 , B21F3/06 , B21F11/00
CPC分类号： B21F35/00 , B21F3/06 , B21F11/005 , B21F23/00 , B21F99/00 , H05B6/101
摘要： A spring forming device in which the steel wire can be continuously cut off without stopping the feeding of the steel wire in cutting, and in which the steel wire can be uniformly heated, is provided. The spring forming device has a wire supplying mechanism for supplying a steel wire using a plurality of feeding rollers, a heating mechanism for heating the steel wire, a coiling mechanism for forming in a coil state the heated steel wire, and a cutting mechanism for cutting the steel wire coiled at a given number of turns off the steel wire remained backward. A cutting blade of the cutting mechanism follows tracks having a speed Va that moves to the receiving blade and a speed Vc that moves in an axial direction of the coiled steel wire, in cutting of the steel wire.
摘要翻译：本发明提供一种弹簧成形装置，其能够在不停止切断钢丝的供给的同时连续切断钢丝，并且能够均匀加热钢丝。该弹簧成形装置具有用于供给使用多个供给辊的钢丝的供丝机构，对钢丝进行加热的加热机构，将加热后的钢丝以线圈状态成形的卷取机构，以及切断机构在给定的钢丝匝数下盘绕的钢丝保持向后。在切割钢丝时，切割机构的切割刀片跟随具有移动到接收刀片的速度Va的轨道和沿着盘绕钢丝的轴向移动的速度Vc。

2. 发明公开

EP2743366A4 COMPRESSION COIL SPRING AND METHOD FOR PRODUCING SAME 有权转让
标题翻译：压缩螺旋弹簧及其制造方法
公开(公告)号：EP2743366A4
公开(公告)日：2016-06-22
申请号：EP12822031
申请日：2012-07-26
申请人： NHK SPRING CO LTD
发明人： IKAI KAZUYA , SHIRAISHI TOHRU , ONO YUICHIRO , ONO YOSHIKI
IPC分类号： C22C38/04 , B21F35/00 , B24C1/10 , C21D7/06 , C21D8/06 , C21D9/02 , C22C38/02 , C22C38/18 , C22C38/24 , C22C38/34 , C22C38/46 , C22C38/54 , F16F1/02 , F16F1/06
CPC分类号： F16F1/021 , B21F35/00 , B24C1/10 , C21D7/06 , C21D8/065 , C21D9/02 , C21D2211/008 , C22C38/02 , C22C38/04 , C22C38/18 , C22C38/24 , C22C38/34 , C22C38/46 , F16F1/06
摘要： By giving an appropriate compressive residual stress to a wire material, a compression coil spring having high durability can be provided even using an inexpensive wire material. The present invention provides a compression coil spring formed by using a steel wire material, the steel wire material consisting of C: 0.45 to 0.85 mass%, Si: 0.15 to 2.5 mass%, Mn: 0.3 to 1.0 mass%, Fe and inevitable impurities as a remainder, and a circle-equivalent diameter of 1.5 to 9.0 mm, wherein hardness of a freely selected cross-section of the wire material is 570 to 700 HV, and at an inner diameter side of the coil spring, unloaded compressive residual stress at a depth of 0.2 mm from a surface in an approximate maximal main stress direction in a case in which compressive load is loaded on the spring is 200 MPa or more, and unloaded compressive residual stress at a depth of 0.4 mm from surface is 100 MPa or more.

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