Influence and verification of different feed ranges on cold pilgering
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摘要: 皮爾格冷軋無縫鋼管過程中為了獲得性能較好的成品需要選擇合理的送進量數值，本文以冷軋304不銹鋼為研究對象，借助有限元模擬軟件對不同送進量下的皮爾格冷軋過程進行了完整的仿真，對比分析了送進量對金屬流動速度、軋制力、等效應力、殘余應力及管材回彈的影響規律.結果表明軋制過程中孔型背脊和與軋輥接觸的孔型側壁處管材金屬流動速度隨送進量增加而增加，軋制力、等效應力及殘余應力均隨送進量的增加而增大，并且送進量的增大還會顯著增加管材的回彈量.借助試驗軋機對不同送進量下皮爾格冷軋管進行軋制試驗，對試驗得到的管材進行尺寸和殘余應力測量，測量結果與有限元仿真結果基本一致，為皮爾格軋制過程不同送進量的選擇提供依據.Abstract: To achieve better performance in finished cold-pilger rolled stainless steel tubes, it is critical to select an appropriate feed range. In this study, cold-rolling 304 stainless steel tube was used as the research object to simulate the entire cold-pilgering process at different feed ranges. Using finite element software, it was comparatively analyzed that the feed range effects on the metal flow rate, rolling force, equivalent stress, residual stress, and piping spring-back. The results indicate that the metal flow rate increases with an increased feed range in the groove bottom and the contact of the groove flank with the roll. In addition, the rolling force, equivalent stress and residual stress increase with increases in the feed range, increments of which will increase the spring-back of the piping. Rolling tests at different feed ranges were performed with the help of experimental rolling mill and it is found that test results are roughly identical to the simulation results. experimental test results regarding the dimensions and residual stress of the piping provide evidence for optimizing the selection of the feed range in pilger rolling.
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Key words:
- cold pilgering /
- feed range /
- groove bottom /
- equivalent stress /
- residual stress
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參考文獻
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