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1. 发明申请

US20160136712A1 HEATING METHOD, HEATING APPARATUS, AND HOT PRESS MOLDING METHOD FOR PLATE WORKPIECE 审中-公开
标题翻译：加热方法，加热装置和板式工件的热压成型方法
公开(公告)号：US20160136712A1
公开(公告)日：2016-05-19
申请号：US14895968
申请日：2014-06-02
申请人： NETUREN CO., LTD.
发明人： Hironori OOYAMA , Fumiaki IKUTA
IPC分类号： B21D22/02 , H05B3/03 , H05B3/00 , H05B3/02 , C21D1/40 , C21D9/46
CPC分类号： B21D22/022 , C21D1/40 , C21D1/673 , C21D9/46 , C21D2221/00 , C21D2221/10 , H05B3/0004 , H05B3/023 , H05B3/03
摘要： A heating method, a heating apparatus, and a hot press holding method for a plate workpiece are provided. The plate workpiece has a first region and a second region. A cross sectional area of the first region in a widthwise direction of the plate workpiece is substantially uniform along a longitudinal direction of the plate workpiece or is monotonically increased or decreased along the longitudinal direction. The second region is adjoining a portion of the first region in a monolithic manner. The method includes heating the second region, and heating at least the first region by direct resistance heating along the longitudinal direction. The second region is heated before heating the first region such that the first region and the second region are heated to be in a given temperature range.
摘要翻译：提供了一种用于板材工件的加热方法，加热装置和热压保持方法。板工件具有第一区域和第二区域。板状工件的宽度方向上的第一区域的横截面积沿着板状工件的长度方向基本均匀，或者沿纵向方向单调增加或减少。第二区域以单片方式邻接第一区域的一部分。该方法包括加热第二区域，并且通过沿纵向的直接电阻加热至少加热第一区域。在加热第一区域之前加热第二区域，使得第一区域和第二区域被加热到给定的温度范围。

2. 发明申请

US20170164425A1 HEATING METHOD, HEATING APPARATUS AND METHOD OF MANUFACTURING PRESS-MOLDED ARTICLE 审中-公开
公开(公告)号：US20170164425A1
公开(公告)日：2017-06-08
申请号：US15320502
申请日：2015-06-22
申请人： NETUREN CO., LTD.
发明人： Hironori OOYAMA , Fumiaki IKUTA
IPC分类号： H05B3/00 , B21D22/02 , H05B3/42 , H05B3/02 , H05B3/06
CPC分类号： H05B3/0004 , B21D22/022 , B21D22/208 , C21D1/40 , C21D1/673 , C21D9/0012 , C21D2221/00 , C21D2221/10 , H05B3/023 , H05B3/03 , H05B3/06 , H05B3/42
摘要： A heating method, a heating apparatus, and a method of manufacturing a press-molded article using the heating method are provided. A pair of electrodes is arranged on a workpiece along a first direction. Each electrode has a length extending across a first heating area of a workpiece in the first direction. At least one of the electrodes is moved in the first heating area and along a second direction intersecting the first direction at a constant speed while applying electric current between the pair of electrodes to heat the first heating area by direct resistance heating. The electric current applied between the pair of electrodes is adjusted such that a heating temperature is adjusted for each segment into which the first heating area is divided so as to be side by side in the second direction.

3. 发明申请

US20160010175A1 WIRE HEATING SYSTEM AND WIRE HEATING METHOD 审中-公开
标题翻译：电线加热系统和电热加热方法
公开(公告)号：US20160010175A1
公开(公告)日：2016-01-14
申请号：US14771286
申请日：2014-03-14
申请人： NETUREN CO., LTD.
发明人： Takashi HORINO , Fumiaki IKUTA
IPC分类号： C21D9/54 , C21D1/42 , H05B6/08 , H05B1/02 , H05B6/10
摘要： A wire heating system includes an induction heating apparatus having a power supply and an induction coil arranged to heat a wire rod by an induction heating using current supplied from the power supply, and a controller configured to control the current to be supplied to the induction coil based on a feeding speed of the wire rod. The induction heating apparatus has a heating section in which the wire rod is heated by the induction heating using the induction coil, and a soaking section located downstream of the heating section to homogenize the temperature distribution of the induction-heated wire rod. The controller is configured to control the current to be supplied to the induction coil such that a temperature of the wire rod at a downstream end of the soaking section becomes a target temperature.
摘要翻译：线加热系统包括具有电源和感应线圈的感应加热装置，所述感应加热装置布置成通过利用从所述电源供给的电流进行的感应加热来加热线材;以及控制器，被配置为控制提供给所述感应线圈的电流基于线材的进给速度。感应加热装置具有通过使用感应线圈的感应加热来对线材进行加热的加热部和位于加热部下游的均热部，使感应加热线材的温度分布均匀化。控制器被配置为控制提供给感应线圈的电流，使得在均热部分的下游端的线材的温度变为目标温度。

4. 发明申请

US20190030584A1 HEATING METHOD, HEATING APPARATUS, AND HOT PRESS MOLDING METHOD FOR PLATE WORKPIECE 审中-公开
公开(公告)号：US20190030584A1
公开(公告)日：2019-01-31
申请号：US16128940
申请日：2018-09-12
申请人： NETUREN CO., LTD.
发明人： Hironori OOYAMA , Fumiaki IKUTA
IPC分类号： B21D22/02 , H05B3/00 , H05B3/03 , C21D9/46 , C21D1/673 , C21D1/40
摘要： A heating method, a heating apparatus, and a hot press holding method for a plate workpiece are provided. The plate workpiece has a first region and a second region. A cross sectional area of the first region in a widthwise direction of the plate workpiece is substantially uniform along a longitudinal direction of the plate workpiece or is monotonically increased or decreased along the longitudinal direction. The second region is adjoining a portion of the first region in a monolithic manner. The method includes heating the second region, and heating at least the first region by direct resistance heating along the longitudinal direction. The second region is heated before heating the first region such that the first region and the second region are heated to be in a given temperature range.

5. 发明申请

US20190021140A1 INDUCTION HEATING SYSTEM, INDUCTION HEATING METHOD, OUTPUT MONITORING APPARATUS, OUTPUT MONITORING METHOD, AND INDUCTION HEATING APPARATUS 审中-公开
公开(公告)号：US20190021140A1
公开(公告)日：2019-01-17
申请号：US16132600
申请日：2018-09-17
申请人： NETUREN CO., LTD.
发明人： Tetsuya ONO , Masato SUGIMOTO , Yutaka KIYOSAWA , Toshihiro AIBA , Kazutomi OKA , Kunihiro KOBAYASHI , Fumiaki IKUTA , Kazuhiro KAWASAKI
IPC分类号： H05B6/06 , G01R31/40 , G01R21/06
摘要： An induction heating system includes induction heating apparatuses, each including a high-frequency current transformer, a low-frequency current transformer and a heating coil, a high-frequency input switch connected to the high-frequency current transformer, a low-frequency input switch connected to the low-frequency current transformer, a first power source to output a high-frequency electric power and a low frequency electric power, a second power source, a first power source output switch connectable to the first power source, a second power source output switch connectable to the second power source, and a switch controller. Each induction heating apparatus includes a heater controller to send a signal to the switching controller to turn on one of the first power source output switch and the second power source output switch, to turn off the other, and to switch on or off each of the high-frequency input switch and the low-frequency input switch.

6. 发明申请

US20180029103A1 HEATING METHOD, HEATING APPARATUS AND METHOD FOR MANUFACTURING PRESS-MOLDED ARTICLE 审中-公开
公开(公告)号：US20180029103A1
公开(公告)日：2018-02-01
申请号：US15548848
申请日：2016-03-02
申请人： NETUREN CO., LTD.
发明人： Hironori OOYAMA , Fumiaki IKUTA
IPC分类号： B21D37/16 , H05B3/00
摘要： A heating method, a heating apparatus, and a method for manufacturing a press-molded article using the heating method are provided. Electrodes are placed on a workplace to extend across a heating target region in a first direction. At least one of the electrodes is moved in a second direction perpendicular to the first direction over the heating target region while applying electric current to the electrodes. A distribution of contact pressure between at least one of the electrodes and the workpiece along the first direction is adjusted, with a plurality of segment regions being defined by dividing the heating target region such that the segment regions are arranged side by side in the first direction, and in accordance with a length of each of the segment regions between the electrodes, to adjust a healing temperature of each of the segment regions of the heating target region.

7. 发明申请

US20160234885A1 INDUCTION HEATING COIL, INDUCTION HEATING DEVICE, AND HEATING METHOD 审中-公开
标题翻译：感应加热线圈，感应加热装置和加热方法
公开(公告)号：US20160234885A1
公开(公告)日：2016-08-11
申请号：US15022721
申请日：2014-09-17
申请人： NETUREN CO., LTD.
发明人： Hidehiro YASUTAKE , Fumiaki IKUTA , Kengo FUKAZAWA
IPC分类号： H05B6/04 , H05B6/44 , H05B6/36
CPC分类号： H05B6/04 , H05B6/102 , H05B6/36 , H05B6/40 , H05B6/44
摘要： An induction heating coil (3) has a primary coil (4) to which electric power is supplied and a ring-shaped secondary coil (5) forming a closed circuit. The primary coil (4) has a base-side portion that covers an outer periphery of the secondary coil (5) and a distal-side portion extending from the base-side portion in the center axis direction of the secondary coil (5) in a state in which the base-side portion covers the secondary coil (5). The opening width of the base-side portion is greater than the opening width of the distal-side portion. The secondary coil (5) is provided such that it can be inserted into and removed from the inside of the primary coil (4) from the base-side portion of the primary coil (4).
摘要翻译：感应加热线圈（3）具有供给电力的初级线圈（4）和形成闭路的环状次级线圈（5）。初级线圈（4）具有覆盖次级线圈（5）的外周的基部侧部分和从次侧线圈（5）的中心轴线方向从基部侧延伸的前端部，基部侧覆盖次级线圈（5）的状态。基部侧部的开口宽度大于前端部的开口宽度。次级线圈（5）被设置成能够从初级线圈（4）的基部侧插入到初级线圈（4）的内部并从其移除。

8. 发明申请

US20200290114A1 SHAFT DIAMETER ENLARGEMENT CONDITION SETTING METHOD, SHAFT DIAMETER ENLARGEMENT METHOD AND SHAFT DIAMETER ENLARGEMENT APPARATUS 审中-公开
公开(公告)号：US20200290114A1
公开(公告)日：2020-09-17
申请号：US16753069
申请日：2018-10-31
申请人： NETUREN CO., LTD.
发明人： Mitsuhiro OKAMOTO , Fumiaki IKUTA , Yoshitaka KUWAHARA , Kazuki MORI , Takashi IKEDA
IPC分类号： B21K1/12
摘要： A method for setting conditions for a shaft diameter enlargement, a shaft diameter enlargement method, and a shaft diameter enlargement apparatus are provided. A controller of the shaft diameter enlargement apparatus controls a compressing section, a bending section, and a rotating section to enlarge an intermediate portion of a shaft workpiece to have a predetermined outer diameter by rotating the shaft workpiece about its axis with axial compressive force a bending angle being applied to the intermediate portion. The controller determines whether the shaft workpiece is acceptable, based on the number of rotations of die shaft workpiece required for enlarging the intermediate portion to have the predetermined outer diameter or based on an enlargement ratio of the intermediate portion.

9. 发明申请

US20180104761A1 DIRECT RESISTANCE HEATING SIMULATION METHOD 审中-公开
公开(公告)号：US20180104761A1
公开(公告)日：2018-04-19
申请号：US15558745
申请日：2016-06-24
申请人： NETUREN CO., LTD.
发明人： Takashi HORINO , Akira TERAJIMA , Fumiaki IKUTA , Hiroki INOUE
IPC分类号： B23K11/11 , B23K11/26 , B23K11/31
摘要： A direct resistance heating simulation method is provided. In this method, a welding region and its peripheral region of steel sheets to be welded by a pair of electrodes are divided into a plurality of elements. A coupled analysis is performed such that a temperature, a metal structure, stress and strain at each element are determine in a mutually associated manner based on Joule loss obtained through a current analysis and a magnetic field analysis for each element. The coupled analysis is repeated to predict an effect of one or more parameters, including at least one of a frequency, a magnitude and an application time of electric current to be applied to the electrodes, a cooling time, a pressure applied from the electrodes to the steel sheets and a shape of the electrodes, on welding quality after a post-heating by direct resistance heating and to improve weld strength.

10. 发明申请

US20180056371A1 METHOD AND APPARATUS FOR MANUFACTURING STEPPED MEMBER 审中-公开
公开(公告)号：US20180056371A1
公开(公告)日：2018-03-01
申请号：US15563029
申请日：2016-05-13
申请人： NETUREN CO., LTD.
发明人： Yoshitaka KUWAHARA , Kazuki MORI , Takashi IKEDA , Fumiaki IKUTA
IPC分类号： B21J5/08 , B21K1/24 , B21K23/04
CPC分类号： B21J5/08 , B21K1/24 , B21K1/46 , B21K23/04 , B23D55/04
摘要： A method and an apparatus for manufacturing a stepped member are provided. An intermediate portion of a shaft workpiece is radially enlarged while being compressed in an axial direction by applying alternating load to the intermediate portion in a direction intersecting the axial direction in a state in which pressure that compresses the shaft workpiece in the axial direction is applied to both ends of the shaft workpiece. The enlarged intermediate portion of the shaft workpiece is cat in a direction perpendicular to the axial direction so that the shaft workpiece is divided into two stepped members. Each of the stepped members has a shaft portion and a head portion provided at an axial end of the shaft portion, and the head portion has a larger diameter than the shaft portion.

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