一种新型分度轴精度分析

Precision analysis of a new type dividing shafting

采用激光直写技术在凹球面上生成等宽等间距的网栅图形,需要保证四轴同心。其中,分度轴作为工件装卡、定心的关键轴系,必须达到微米级的回转精度。为了降低主轴及轴套的加工难度,又能达到轴系回转精度的要求,设计中把轴承的内外环与主轴和轴套分离开来,轴承内外环与钢球采用过盈配合,而主轴与轴承内环之间和轴套与轴承外环之间均采用过渡配合,通过轴端压盖紧固的方法,可以保证轴系的回转精度。

The idea that making equal distance and width of the metal mesh on the concave of a sphere by laser scribing grid, should put four axis of the equipment on one centre. One of them is dividing shafting which is the pivotal one to clamp workpieces . It should be the degree to process the shafting easier and to gyre it better, apart the outer of the axletree from of micron .Both the bush of the shafting and the insider from the spindle, also make interference fit between the insider of the axletree and the steel ball and make inter fit between the bush of the shafting and the outer of the axletree, tighten the cover of the axletree, so the precision of shafting is assured.