Static coil apparatus and method for welding thermoplastic composite structures
    1.
    发明授权
    Static coil apparatus and method for welding thermoplastic composite structures 有权
    用于焊接热塑性复合结构的静态线圈装置和方法

    公开(公告)号:US06323468B1

    公开(公告)日:2001-11-27

    申请号:US09557883

    申请日:2000-04-25

    IPC分类号: B23K1301

    摘要: A static coil induction welding apparatus and method for induction welding thermoplastic composite structures. The apparatus includes a plurality of independent coil segments disposed adjacent one another in side-by-side fashion to form a coil pack. A plurality of such coil packs are disposed in side-by-side fashion to form a coil assembly which covers the entire area of the weld zone. An AC power supply associated with each coil pack applies an AC signal through a switching network to electrically energize its associated coil segments such that the AC signals are in predetermined phase relationships relative to one another, thus generating a plurality of eddy current loops in a susceptor placed between the components being welded. The switching network alternately switches the coil segments such that the AC signals applied to the coil segments are shifted back and forth between adjacently disposed coil segments repeatedly approximately every 0.5 seconds. This produces a back and forth lateral shifting of the induced eddy current loops by about one-half the width of one current loop to provide uniform heating of the susceptor. It also eliminates various drawbacks associated with dynamic coil induction welding systems, allows feedback control over the power applied to each coil pack, and produces welds of even more consistent and higher quality than can be achieved with previously developed dynamic coil systems.

    摘要翻译: 一种用于感应焊接热塑性复合结构的静态线圈感应焊接设备和方法。 该装置包括并排设置的多个独立的线圈段,以形成线圈组。 多个这样的线圈组以并排的方式设置以形成覆盖焊接区的整个区域的线圈组件。 与每个线圈组相关联的AC电源通过开关网络施加AC信号以对其相关联的线圈段进行电激励,使得AC信号相对于彼此处于预定的相位关系,从而在基座中产生多个涡流回路 放置在被焊接的部件之间。 交换网络交替地切换线圈段,使得施加到线圈段的交流信号在相邻设置的线圈段之间来回大约每0.5秒重复一次。 这引起感应涡流回路的横向偏移约一个电流回路的宽度的一半,以提供基座的均匀加热。 它还消除了与动态线圈感应焊接系统相关的各种缺陷,允许对施加到每个线圈组的功率进行反馈控制,并且产生比先前开发的动态线圈系统可以实现的甚至更一致和更高质量的焊接。

    Induction processing with the aid of a conductive shield

    公开(公告)号:US06576877B2

    公开(公告)日:2003-06-10

    申请号:US09952824

    申请日:2001-09-14

    IPC分类号: H05B614

    CPC分类号: C21D9/32 C21D1/10 Y02P10/253

    摘要: A method for induction heating a workpiece made of a material such as ferrous material or alloy is carried out by placing a non-magnetic conductive shield in proximity to a current concentrating surface of the workpiece and exposing the workpiece with a shield in place to a time varying magnetic field. The magnetic field induces eddy currents in the surface of the workpiece. The conductive shield is placed in sufficient proximity to reduce or eliminate the eddy currents in the portion covered by the shield. At least a part of the uncovered portion of the workpiece is heated above the austenitizing or solution temperature of the material. At the same time, the covered portions of the workpiece are protected from overheating by the shield. The workpiece is then quenched to complete the hardening process.

    Edge seals for composite structure fuel tanks
    5.
    发明申请
    Edge seals for composite structure fuel tanks 有权
    复合结构燃油箱边缘密封

    公开(公告)号:US20080128430A1

    公开(公告)日:2008-06-05

    申请号:US11581120

    申请日:2006-10-13

    IPC分类号: F17C1/02

    摘要: The cut laminate edges of aircraft fuel tanks formed of carbon fiber reinforced polymers are sealed to prevent the exposure of carbon fibers to combustible fuel. The edge seal is produced from a prepreg form using a thermosetting resin matched to the characteristics of the resin used in the laminate. The prepreg form can be applied to the cut laminate edges either before or after the laminate is cured. The edge seal acts a dielectric layer that both electrically insulates the cut laminate edges from the fuel and mechanically contains energetic particles produced at the edges due to lighting strikes or other sources of electrical charges.

    摘要翻译: 由碳纤维增强聚合物形成的飞机燃料箱的切割层压边缘被密封以防止碳纤维暴露于可燃燃料。 边缘密封由使用与层压体中使用的树脂的特性相匹配的热固性树脂的预浸料形式制成。 预浸料形式可以在层压板固化之前或之后施加到切割的层压板边缘。 边缘密封件作用于将切割的层压体边缘与燃料电绝缘的电介质层,并机械地包含由于点火或其他电荷源在边缘产生的高能粒子。

    System and method for controlling an induction heating process
    6.
    发明授权
    System and method for controlling an induction heating process 有权
    用于控制感应加热过程的系统和方法

    公开(公告)号:US06528771B1

    公开(公告)日:2003-03-04

    申请号:US10094568

    申请日:2002-03-08

    IPC分类号: H05B606

    摘要: An induction heating system for fabricating a part by heating and forming the part. The induction heating system comprises a smart susceptor that includes a susceptor material that responds to an electromagnetic flux by generating heat and a cavity defined by the susceptor material that is configured to hold the part. An induction coil of the induction heating system is supplied with electrical power so as to generate the electromagnetic flux necessary for the susceptor to generate heat. A temperature controller includes a power supply that supplies electrical power to the induction coil. A controlling element of the temperature controller monitors trends in the electrical power supplied and changes the amount of electrical power being supplied so as to control the temperature of the part during fabrication.

    摘要翻译: 一种用于通过加热和形成部件来制造零件的感应加热系统。 感应加热系统包括智能感受器,其包括通过产生热而响应于电磁通量的基座材料和由被配置为保持该部件的基座材料限定的空腔。 感应加热系统的感应线圈被供给电力,以产生感受器产生热量所需的电磁通量。 温度控制器包括向感应线圈供电的电源。 温度控制器的控制元件监视所提供的电力的趋势,并且改变所提供的电力量,以便在制造期间控制部件的温度。