直齿轮精锻成形新工艺及试验研究

与精锻成形工艺相比,传统的切削加工方法加工直齿轮具有诸多弊端。而当前提出的闭式镦挤成形工艺载 荷过大,严重制约着精密成形直齿轮工艺的实用化。提出采用预锻分流区一分流终锻新工艺精密成形直齿圆柱齿 轮,设计了能够进行多种组合的精锻成形试验模具,并对空心管坯和实心圆柱坯进行了传统的闭式镦挤和新的分 流成形工艺试验,试验结果表明:与传统的闭式镦挤和现有的圆柱直齿轮成形工艺对比,提出的成形工艺工序简 单,终锻后齿形充填饱满,端面平整,而且成形载荷降低了37％以上,具有生产实用化的前景。

New precision forging process and experimental study on spur gears

The traditional machining method on fabricating spur gears has much defects compared to the precision forging process. The current upset-extrusion process is difficult to utilize in industry due to its overlarge deformation load. The performing divided flow region and final forging process is proposed. A set of experimental tools with much combination of inserts is designed and used to perform the new process and the upset-extrusion process using tube billets and cylindrical billets, respectively. The experimental results show that the new process can not only achieve the spur gears with full teeth and smooth end surface but also reduce deformation load more than 37%. The new process has potential for future industry application.