煤矿的原煤大多是用皮带运输的,而托辊又是皮带运输设备中的一个主要部分,所以,托辊的加工在矿机厂则是一种经常性的工作,而且数量大、工件质量要求也高。 由于普通车床的主轴内孔较小,加工的托辊根本无法放进主轴内,所以,当卡盘夹持托辊的一端时,另一端就呈悬空状态,因此 Most of the raw coal in coal mines is transported by belts, while the idler roller is a major part of the belt transportation equipment. Therefore, the processing of the idler roller is a kind of regular work in the miner’s factory, and the quantity is large, the quality of the workpiece Also high. As the ordinary lathe spindle bore smaller processing roller can not be placed in the spindle, so when the chuck holding one end of the roller, the other end of the state was vacant, so