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四、常温和低温条件下多次冲击抗力一、试验概况多次冲击弯曲试验是在DC—150型多次试验机上进行的,试验机为落锤式的。试样支承在支座上,冲锤在电动机带动下做垂直上下运动,对试样进行反复的多次冲击。试样的工作部分承受四点纯弯,试样的一端由传动机构带动,每冲击一下转动一角度,本次试验调节在每冲一次旋转180°。改变冲锤重量、冲程大小或冲击速度都可改变冲击能量,本次常温试验能量调为7.15,15.4,18.59,22.1,27.3公斤·厘米,低温试验在同一试验机上进行,冲击能量均为15.4公斤·厘米,冲击频率为480次/分。
Fourth, at room temperature and low temperature multiple impact resistance First, the test profile Multiple impact bending test is carried out on the DC-150-type multi-test machine, the test machine is drop-shaped. The sample is supported on the support, the hammer drives the vertical movement of the motor vertically, and repeatedly impacts the sample several times. The working part of the specimen is subjected to a four-point bending test. One end of the specimen is driven by the transmission mechanism, and each impact rotates at an angle. The test is adjusted to rotate 180 ° once per stroke. Change the weight of the hammer, stroke size or impact velocity can change the impact energy, the test room temperature energy transferred to 7.15,15.4,18.59,22.1,27.3 kg · cm, low temperature test on the same testing machine, the impact energy is 15.4 kg · Cm, the impact frequency of 480 beats / min.