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Ultrasonic Assisted Electronic-Discharging by Using Ceramic Fiber Punch for Electrode

陶瓷纤维冲头电极超声辅助电子放电

基本信息

批准号：
17560095
负责人：
MORI Toshihiko
金额：
$ 2.18万
依托单位：
Nagoya University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2005
资助国家：
日本
起止时间：
2005 至 2006
项目状态：
已结题

项目摘要

The strength of the SiC fiber is higher than hard steels and its rigidity is approximately the same. Therefore, a single SiC fiber is a good candidate for an ultrafine punch. The ultrafine piercing must be conducted without lubricant in continuous processes. Thermal stability of the ceramic fiber is guaranteed, and SiC is stabilized against oxidation by forming an oxygen-impervious silica layer. Besides, ceramics are chemically less reactive to metals. Therefore, a long tool life is expected for ceramics fiber punches. The fiber punch making method employed in our study, by buffing and electrolysis, referred as FPBE process. The ultrafine piercing system is controlled by a personal computer. The computer sends control signals through a D/A converter to (1) a piezoelectric driver, the power source of the piezoelectric actuator, that moves the punch, and (2) the driver unit of the stepping motor that wind the pierced foil while obtaining data through an A/D converter from (3) a load cell … More measuring punch force, and (4) a displacement sensor measuring the punch stroke.Punch speed is controlled by the change of the piezoelectric driver voltage signal. Metallic foil feed is set by the diameter of the winding drum and the rotation of the stepping motor. The eddy current type displacement sensor for measuring the punch stroke has a maximum measuring length of 1 mm, and does not add up to the punch load measurement because of non-contact type. The load cell for measuring punch loads has the maximum load of 5 N. The forces acting on the load cell vs. punch stroke are measured for both the non-cutting and piercing strokes and the net punch load is obtained from the difference of the two loads. Commercial pure aluminum foil (A1100-H) of 17 thickness, beryllium copper foil (25 alloy-1/4H) of 15 um thickness and stainless steel foil (SUS304-H) of 8 p.m thickness were selected as materials to be pierced. The stainless steel foil is a high strength material and the beryllium copper has a good deformability and can be used as high strength conductive springs. Observation of the pierced hole shows that most of the sheared surface of the aluminum and beryllium copper is a smooth, whereas that of the stainless steel is composed of 66 % smooth and 33 % fractured surface area without burr. After 1000 taps, the punch used for the aluminum foil and beryllium copper foil had no cracks, wear or seizure whereas the stainless steel showed no wear but cracks. Less

SiC纤维的强度高于硬钢，其刚度大致相同。因此，单根SiC纤维是超细冲头的良好候选者。在连续生产过程中，超细穿孔必须在没有润滑剂的情况下进行。陶瓷纤维的热稳定性得到保证，并且通过形成不透氧的二氧化硅层来稳定SiC以防止氧化。此外，陶瓷对金属的化学反应性较低。因此，陶瓷纤维冲头的刀具寿命较长。本研究所采用的纤维冲孔方法，即抛光电解法，简称FPBE法。超细穿孔系统由个人计算机控制。计算机通过D/A转换器将控制信号发送到（1）压电驱动器，压电致动器的电源，其移动冲头，和（2）步进电机的驱动器单元，其缠绕穿孔的箔，同时通过A/D转换器从（3）测力传感器获得数据 ...更多信息测量冲压力，以及（4）测量冲压行程的位移传感器，通过压电驱动器电压信号的变化来控制冲压速度。金属箔进给量由卷筒直径和步进电机的旋转来设定。用于测量冲头行程的涡流型位移传感器的最大测量长度为1 mm，并且由于是非接触型，因此不与冲头载荷测量相加。用于测量冲头载荷的测力传感器的最大载荷为5 N。测量非切割和穿孔冲程中作用在测力传感器上的力与冲头冲程的关系，并从两个载荷的差值中获得净冲头载荷。选择17 μ m厚的商业纯铝箔（A1100-H）、15 μ m厚的铍铜箔（25合金-1/4H）和8 μ m厚的不锈钢箔（SUS 304-H）作为待穿孔的材料。不锈钢箔是高强度材料，铍铜具有良好的变形性，可用作高强度导电弹簧。穿孔观察表明，铝和铍铜的剪切表面大部分是光滑的，而不锈钢的剪切表面由66%的光滑和33%的断裂表面组成，没有毛刺。在1000次轻敲之后，用于铝箔和铍铜箔的冲头没有裂纹、磨损或咬合，而不锈钢没有磨损，但有裂纹。少