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“分离罗拉”是我厂生产的A201精梳机中关键零件之一,材料为20CrMo,渗碳层深0.3～0.4,硬度大于HRA79。此轴不仅细而长(如图1),而且在各段轴颈之间有带斜沟槽、直径为ф23d_4的圆柱体,它是由无心磨床加工的,并以此作为精磨ф19dc_4各轴颈的定位基准。各段轴颈的圆度要求为0.01,与ф23d_4的不同心度允差为0.025。但是在磨加工后,各段轴颈(ф19d_4)上出现多角形、椭圆形和不同心度等问题。我厂生产A201精梳机二十多年,这个问题一直没有得到解决。为了解决其中的工艺问题,我们对产生轴颈误差的原因作了分析,在这个基础上,设计了磨加工轴颈的专用工艺装备,现在磨加工后的轴颈精度达到技术要求。为了对类似加工有所启发,现作如下介绍。
“Detach Roller” is one of the key parts of A201 comber produced by our factory. The material is 20CrMo, the depth of carburized layer is 0.3 ~ 0.4 and the hardness is greater than HRA79. This shaft is not only thin and long (Figure 1), but also in the paragraphs between the journal with oblique grooves, ф23d_4 diameter of the cylinder, it is by the centerless grinder processing, and as a fine grinding ф19dc_4 axis Neck positioning benchmark. The circularity of each section of the journal requirements of 0.01, and ф23d_4 different concentricity tolerance of 0.025. However, after grinding, each section of the journal (ф19d_4) on the emergence of polygons, ellipses and different concentricity and other issues. I plant production A201 comber twenty years, this problem has not been resolved. In order to solve one of the technical problems, we made an analysis of the causes of the journal error. On this basis, we designed the special process equipment for grinding and machining the journal, and the grinding precision of the journal meets the technical requirements. In order to be inspired by similar processing, the following is introduced.