车制实体保持架缓冲槽结构兜孔工艺分析

圆柱滚子轴承保持架的制造精度及精度稳定性是轴承能够适应各种工况要求、平稳运转的关键要素。兜孔是保持架的主要工作部位,车制实体保持架兜孔通常为直兜孔和铣、拉成形兜孔2种结构,根据保持架及兜孔的结构、尺寸范围,一般以拉削、线切割等工艺方法实现兜孔加工。为进一步提高保持架的兜孔位置精度和表面质量,优化了兜孔设计结构,将保持架兜孔4个顶角由过渡小圆弧改为缓冲槽结构,兜孔加工将原工艺"钻、铣孔→拉方孔"工序合并,只需要"钻、铣兜孔"一道工序完成,大幅度提高了保持架制造精度。

Analysis on Machined Process for Pockets with Buffer Slot Structure of Solid Cages

The manufacturing accuracy and accuracy stability for cages of cylindrical roller bearings are key elements to accommodate various operating conditions and keep stable operation. The pockets are main working surface of cages,the machined solid cage pockets are generally straight pockets and milling formed pockets. According to structure and size range of cages and pockets,the processing of pockets is realized by broaching and wire cutting. In order to further improve position accuracy and surface quality of cage pockets,the design structure of pockets is optimized. Four corners on cage pockets are changed from transitional small arc to buffer slot structure. The processing of pockets is changed from original process of"drilling and milling→broaching square hole"to "drilling and milling pocket". The manufacturing accuracy of cages is improved greatly.