Metal flow controlled by back pressure in the forming process of rib-web parts
Metal flow controlled by back pressure in the forming process of rib-web parts
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肋腹板零件成形过程中由背压控制的金属流动
DOI：
10.1007/s00170-018-1883-3
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发表时间：
2018-04
影响因子：
3.4
通讯作者：
Li Jianjun
中科院分区：
文献类型：
--
作者：
Deng Lei;Dai Wenlei;Wang Xinyun;Jin Junsong;Li Jianjun
汽车、飞机等广泛使用的肋腹板零件在成形过程中，常常因金属流动不合理而出现严重的流线紊乱。在这项研究中，介绍了一种可以控制金属流动方向的背压控制成形方法。研究了反压值、加载方式和反压距离等关键参数对金属流动的影响。结果表明，合理控制背压参数可以避免流线缺陷，降低最终成形载荷。与线性增加背压模式相比，恒定背压模式更有利于获得良好的成形质量。从金属流动的应力分析可以看出，背压改变了肋根部的应力状态，使得金属更容易沿切向或径向流动。通过将背压控制成形方法应用于压缩机涡旋转子，证实了其优点。
In the forming process of rib-web parts, which are widely used in automobiles and aircrafts, severe streamline disorder often occurs because of unreasonable metal flow. In this study, a back-pressure-controlled forming method that can control the direction of metal flow was introduced. The effects of key parameters on metal flow were investigated, including the back-pressure value, loading mode, and back-pressure distance. The results showed that streamline defects can be avoided and the final forming load can be reduced by reasonably controlling the back-pressure parameters. The constant back-pressure mode was more conducive to achieving good forming quality compared with the linear-increased back-pressure mode. From the stress analysis of metal flow, it was demonstrated that the stress state in the rib root is changed by the back pressure, which makes the metal flow more easily along either the tangential or the radial direction. The advantages of the back-pressure-controlled forming method were confirmed by applying it to a compressor scroll rotor.
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DOI：
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