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过去钢材(坯)低倍检验试样是热锯锯取的,长度为60～120mm。试样两端带有热锯时留下的毛刺。因试样较短,只能卡在夹具上30mm左右。所以必须把两个夹点的毛刺用手工打平,才能夹紧试样。而且锯取的试样面多数与料的纵向不垂直,类似马蹄形。还得经过两道粗、细车削加工,然后上磨床一块块磨。这种加工方法工序多、效率低、劳动强度大,手工紧固就有4～5次。同时试样周转时间长,能源消耗大。且加工出试样长度不同,限制了磨削加工。现在我们自行设计了一件很简单的卡具,可以卡两端带有毛刺的试样。把卡具固定在锯床平底板上,将试样放在卡具孔中,只紧固一次即可。再用二件靠板来代替单锯
In the past, steel (billet) low magnification test specimen is taken by a hot saw, the length of 60 ~ 120mm. Glitches left on the sample with a hot saw at both ends. Because the sample is shorter, only stuck in the fixture about 30mm. Therefore, the grips of two grips must be flattened by hand to clamp the specimen. And saw the sample surface most of the material is not vertical and vertical, similar to the horseshoe. Have to go through two rough, thin turning, and then grinding on the block. This processing method and more processes, low efficiency, labor-intensive, manual fastening there are 4 to 5 times. At the same time sample turnover time, energy consumption. And processed samples of different lengths, limiting the grinding process. Now we designed a very simple fixture, you can card with burr on both ends of the sample. The fixture fixed to the sawing machine flat floor, the sample on the hole in the fixture, only one fastening can be. Use two more plates instead of a single saw