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C258型轮辗机是苏联的118型碾砂机的变型产品,我厂从1961年开始生产。通过生产实践和用户访问,证实该机的结构是比较陈旧落后的。例如,内刮砂板是装在辗轮轴上,随辗轮轴起落,根本起不到刮净物料的作用,辗盘中间的物料不能刮出。底座的刚性差,易变形,影响整个机器的稳定。特别是卸料装置,是手动杠杆式的,不但笨重,劳动强度大,卸料时间长,效率低,倒料倾角过大,而且当卸于料时,料尘飞扬,严重地损害工人身体健康。长春第一汽车制造厂就有四台进口的118型碾砂机,工人把卸料装置都拆掉,宁愿用铁锹出料也不用它(图1)。
C258-type roller mill is the Soviet Union’s 118-type milling machine variants, I plant from 1961 to begin production. Through the production practices and user visits, confirmed that the structure of the aircraft is relatively old and backward. For example, within the scraper is mounted on the roller shaft, with the roller shaft ups and downs, simply can not scratch the net material, the material in the middle of the roller disc can not be scraped out. Poor rigidity base, easy deformation, affecting the stability of the entire machine. In particular, the unloading device is manually lever-type, not only bulky, labor-intensive, long discharge time, low efficiency, overturn angle is too large, and when discharged in the material, the dust flying, seriously damaging the health of workers . Changchun No. 1 Automobile Factory has four imported type 118 sand mills. The workers demolished the unloading device and would rather use a spade to dispense it (Figure 1).