首页> 外文会议>International ESAFORM Conference on Material Forming >Material saving by a combination of rotary forging and conventional processes: hybrid forging for net- shape gear
【24h】

Material saving by a combination of rotary forging and conventional processes: hybrid forging for net- shape gear

机译:通过旋转锻造和常规方法的组合节省材料:用于网状齿轮的混合锻造

获取原文

摘要

Increasing efficiency in raw material and energy usage is vital, even more in sectors, such as the hot forging industry, where material accounts for 50% of component price and energy costs are continuously rising. One of the methods to achieve this is to minimize material waste. Traditionally, high-quality gears for the automotive sector are machined to shape from forged preforms which is wasteful of both materials and energy. Attention has now turned to the forging of tooth gears by conventional forging. However, this could require high forging loads and therefore huge press sizes. Some gears may also be difficult to form due to the placement of their teeth. Forging of tooth gears is thus not a straightforward task. In this context, rotary forging is a powerful alternative. It uses incremental deformation locally with the material to achieve near net shape results, minimizing machining. Due to the reduction in contact, it also allows the forging load to be decreased substantially, resulting in smaller presses. This paper shows the development of the rotary forging process in combination with conventional forging to obtain crown gear teeth as a demonstration case. First, the hot conventional forging is shown, based on obtaining the rotary preform by a closed die forging operation. Then rotary forging is defined as a semi-finished operation to achieve the forged teeth. The objective is to reduce the initial billet weight, checking that folds and filling defects do not appear. A thermomechanical chained model has been developed based on FEM and experimental tests carried out in a pre-industrial environment. The prototypes result in increased yield from raw material (around 15% saving compared to machining) and they can be manufactured with less than 50% of the load required by conventional forging processes. Quality and metallographic requirements are also fulfilled.
机译:在原材料和能源使用情况下提高效率至关重要,甚至更多的部门(如热门锻造行业),材料占组件价格和能源成本的50%持续上升。实现这一目标的方法之一是最小化材料浪费。传统上,汽车部门的高质量齿轮由锻造预制件加工成浪费材料和能量的形状。现在通过传统锻造转向齿轮的锻造。但是,这可能需要高锻造负荷,因此巨大的压力机。由于牙齿的放置,一些齿轮也可能难以形成。因此,齿轮的锻造不是直接的任务。在这种情况下,旋转锻造是一个强大的替代方案。它使用局部变形与材料局部地实现近净形状,最小化加工。由于接触的减少,它还允许锻造负载基本上降低,导致较小的压力机。本文示出了旋转锻造工艺的开发与传统的锻造,以获得作为示范壳体的冠齿齿。首先,基于通过闭合模锻操作获得旋转预制件,示出了热传统锻造。然后旋转锻造被定义为实现锻造齿的半成品操作。目标是减少初始方坯权重,检查折叠和填充缺陷不会出现。基于在工业前环境中进行的有限元和实验测试,开发了一种热机械链模型。原型导致原料的产量增加(与加工相比,节省约15%),并且它们可以用常规锻造工艺所需的负载的载荷的少于50%。质量和金相要求也得到满足。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号