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针对链轮传统机械加工中的切削量大和材料利用率低等缺点,基于链轮结构提出了多排链轮的半精热锻制坯新工艺。阐述了半精模锻制坯工艺中的链轮锻件图形成、毛坯尺寸计算及其在凹模中的定位等技术要点,重点对链轮锻件的齿形设计做了详述,并设计出一套完整的链轮半精热锻制坯模具。通过某三排链轮的精锻工艺计算表明,采用半精密模锻制坯+滚齿切削加工生产单个零件,原材料能节约32.7%,切削加工量减少50.8%。
In view of the disadvantages of large cutting amount and low material utilization in traditional machining of sprocket, a new technology of semi-fine hot forging of multi-row sprocket is proposed based on sprocket structure. The technical points of sprocket forging drawing, blank size calculation and positioning in the die are elaborated. The tooth profile design of the sprocket forging is emphatically described and a Complete set of semi-precision sprocket forging billet mold. The precision forging process calculation of a three-row sprocket shows that the use of semi-precision die forging and hobbing to produce single parts can save 32.7% of the raw materials and reduce the cutting volume by 50.8%.