基于等效中性层模型的辊弯回弹量预测及补偿控制研究

Prediction and compensation control of roll bending rebound of 6005A aluminum alloy profile based on equivalent neutral layer model

摘要:

以6005A铝合金型材为研究对象，提出了一种考虑中性层偏移的铝合金型材辊弯回弹预测及补偿控制方法。分别采用考虑中性层偏移的等效中性层预测模型和忽略中性层偏移以及型材截面形状的经验模型对铝合金型材辊弯回弹进行理论分析，提出基于预测回弹量的铝合金型材补偿控制策略，实现对铝合金型材辊弯的精准控制。将回弹理论分析结果与有限元模拟结果以及实测结果进行对比分析。结果表明，相对于忽略中性层偏移和截面形状影响的经验模型，考虑中性层偏移的预测模型能更准确地预测型材的回弹量，在相同的成形半径下，回弹预测的最大误差可以由10.37％减小到3.96％。

Abstract:

Taking 6005A aluminum alloy profile as the research object, an aluminum alloy profile roll bending springback prediction and compensation control method considering the neutral layer offset is proposed. An equivalent neutral layer prediction model considering the neutral layer offset and an empirical model ignoring the neutral layer offset as well as the profile cross-section shape are respectively used to theoretically analyze the roll bending springback of the aluminum alloy profile, and an aluminum alloy profile compensation control strategy based on the prediction of springback is proposed. To realize accurate control of aluminum alloy profile roll bending. The results of the theoretical analysis of springback are compared with the finite element simulation results and the measured results. The results show that, compared with the empirical model that ignores the effects of neutral layer offset and cross-section shape, the prediction model that considers the neutral layer offset can more accurately predict the amount of springback of the profile, and the maximum error of prediction can be reduced from 10.37% to 3.96% under the same forming radius.