高精度直齿圆柱齿轮冷锻成形加工方法的研究

Research on cold forging methods of accurate spur gears

针对直齿圆柱齿轮冷成形难度大的问题 ,提出了闭式镦挤—约束孔分流两步成形实用化工艺方案和基于变位理论的齿形凹模修正设计方法 ,并对 15、 4 5、 2 0 Cr Mn Ti钢质直齿圆柱齿轮冷精锻工艺进行了系统研究。研究结果表明 ,两步成形法是降低直齿圆柱齿轮冷精锻成形力的有效方法 。

It is difficult to forming accurate spur gears by the cold forging The two\|step forming technology combined closed die\|forging with constrained hole divided\|flow is presented The cold precision forging technology of spur gears are researched systematically for 15,45 and 20CrMnTi steel The results show that the two\|step forming technique is effective on decreasing cold precision forging load of spur gears and the cold forged 20CrMnTi steel spur gears have higher precision by applying the teeth\|shape modification method proposed