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目前,在叶片底面形状对抛砂紧实质量影响的研究中,存在着不同的观点。本文根据试验结果,提出了我们的看法,供大家参考。一、现有的各种观点 1.叶片底面形状不影响抛砂机的工作过程。观察不同形状叶片的抛头工作过程指出,各种情况下型砂都以整块脱离叶片,垂直向下。只有平底叶片后倾角ε(图1)为30°时,看到砂块抛出轨迹向抛头旋转方向偏斜3°～4°。 2.叶片底面形状应为平面。由于弧形底叶片不能保证铸型紧实质量的改善,而平
At present, there are different opinions in the study of the influence of the shape of the blade bottom on the quality of sand-throwing compaction. Based on the test results, this paper put forward our opinion for your reference. First, the existing various points of view 1. The shape of the bottom of the blade does not affect the working process of sand throwing machine. Observation of different shapes leaves the work of throwing head pointed out that the sand in all cases to the whole block off the leaves, vertically down. Only when the blade inclination angle ε (Fig. 1) is 30 °, we can see that the trajectory of sand throwing is skewed by 3 ° ~ 4 ° to the rotation direction of the throwing head. 2. Blade bottom shape should be flat. Since the curved bottom of the blade can not guarantee the quality of the mold to improve the compaction, and flat