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正如聚能装药理论所指出的,欲使两种材料爆炸焊接时产生结合,就要满足倒塌区亚音速来流条件,因此,弄清楚在一定碰撞角度下的最大倒塌速度是很必要的。本文先对有关的理论给以说明,其后对满足特定目的的各种测量技术进行了比较。对一种改进了的测量爆速、板速和动态角的方法给予了详细阐述。最近已能买到名为“爆轰图像仪”(Detotachograph)的仪器。这种仪器把选定好的恒定电流供给倾斜电阻丝,由“直接输出”端测量电阻变化。为获得较好的分辨力,将仪器内产生的锯齿波信号作为补偿信号添加在原始信号上。采用这种爆轰图像仪,按平均爆速值调节信号,图像仪只显示差值。因此,速度和超过原始信号的速度变化量可以更精确地以补偿输出方式记录。这种爆轰图像仪特别适于观察爆轰过程和爆轰波的形成规律。同时,该仪器对于测量爆炸焊接的参数,例如板速、动态角以及由此推算倒塌速度和来流速度都是实用的。
As pointed out by the theory of charged charge, to make the combination of the two materials during explosive welding, it is necessary to meet subsonic flow conditions in the collapsed area. Therefore, it is necessary to find out the maximum collapse speed under a certain collision angle. This article first gives an account of the theory involved and then compares various measurement techniques that meet specific objectives. An improved method of measuring detonation velocity, plate velocity and dynamic angle is given in detail. An instrument called “Detotachograph” has recently been available. The instrument supplies the selected constant current to the skewed resistance wire, which measures the resistance change from the “direct output” terminal. To obtain good resolution, the sawtooth signal generated within the instrument is added as a compensation signal to the original signal. Using this detonation imager, adjust the signal according to the average detonation speed, the image only shows the difference. Therefore, the speed and amount of speed change over the original signal can be more accurately recorded in the compensation output mode. This detonation imager is particularly suitable for observing the detonation process and detonation wave formation. At the same time, the instrument is useful for measuring parameters of explosive welding such as plate speed, dynamic angle, and therefore the collapse rate and the inflow rate.