中文摘要：

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％。

英文摘要：

Aiming to the weaknesses of traditional machining technology for chain wheel, such as big cutting output, low utilization rate of material, etc. , a new technology of semi-precision hot forging blocking of multi-row chain wheel was put forward based on the structure of chain wheel. The key technologies in the process of semi-precision die forging blocking, such as the formation of chain wheel forging figure, size calculation and fixed position in the die of blank, etc. , were elaborated, and the design of tooth profile of chain wheel forging was recounted emphatically, meanwhile a set of integral semi-precision hot forging blocking die for chain wheel was designed. The process calculation of precise forging for a three-rows chain wheel shows that the raw material is saved by 32. 7% and the cutting volume is reduced by 50. 8% with semi-precision die forging blocking and bobbing machining to produce single part.