大型铝合金环件局部加载连续成形工艺的协调变形研究
Coordinative Deformation Research on Local Loading Continuous Forming for Large Aluminum Alloy Ring
王梦寒， 徐志敏， 周 杰
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作者单位：重庆大学 材料科学与工程学院， 重庆400044
中文关键字：大型环件； 送进比； 压下量； 径向变形； 周向变形
英文关键字：large ring; feeding ratio; reduction amount; radial deformation; circumferential deformation
中文摘要：为解决环件成形过程的径、周向协调变形问题，采用数值模拟软件对大型环坯局部加载热成形过程进行了数值模拟。分析了水压机压下量、上砧送进比对环件局部镦粗成形时径向和周向变形量的影响，获得了由3.5 m环坯局部加载连续成形获得5 m环件时，压机压下量与径、周向变形量之间的规律曲线。研究结果表明：当环坯分3次加载成形，单次加载的压下量依次为23%、18%、13%，且送进比控制在30%时，环件径、周向变形较为协调，环件尺寸满足预期要求，环件的内部变形分布合理。研究结果为大型环件的局部加载连续成形提供了指导。
英文摘要：In order to coordinate deformation along radial-circumferential direction in ring deforming process，the hot forming process for large ring billet under local loading was simulated with numerical simulation software. The influence of hydraulic press reduction amount and upper anvil feeding ratio on the deformation degree along radial and circumferential direction in ring local upsetting process was analyzed， and the rule curve of press reduction amount and the deformation degree along the radil - circumferential direction was gained as 3.5 m ring billet expanded to 5 m by local loading continuous forming. The results show that the deformation along radial and circumferential direction is relatively coordinative, the size of ring can meet expected requirements and the distribution of internal deformation is reasonable when the ring billet is deformed in three times, the single reduction amount is 23%, 18% and 13% orderly and the feeding ratio is 30%. The research results can provide guidances for this process.