工艺参数对高强钢管单道次缩径旋压成形质量的影响

发布时间：2018-03-06 08:00

本文选题：高强钢　切入点：缩径旋压　出处：《锻压技术》2017年03期 　论文类型：期刊论文

【摘要】：基于ABAQUS/Explicit平台建立了高强钢管形件双旋轮无芯模缩径旋压成形有限元模型,对其单道次缩径旋压成形过程进行了数值模拟,获得了旋压成形的应力、应变分布规律及工艺参数对成形质量的影响规律,并通过试验验证了数值模拟的可靠性。结果表明:最大残余应力出现在直壁段和开口端外表面,最大等效应变出现在锥形缩口与直壁过渡部分、直壁段和开口端外表面,应力、应变集中区在旋压过程中容易产生过度减薄;随着压下量Δ的增加,壁厚最大减薄量增加、圆柱度增大,在Δ=3 mm时圆度最小;随着进给比f的增加,壁厚最大减薄量减小、圆柱度减小,但平均外径与理想值偏差较大,f=1.0 mm·r-1时综合成形质量较好;随着旋轮圆角半径rρ增加,壁厚最大减薄量减小、圆柱度减小,但在rρ=10 mm时沿轴向截面圆度最小。
[Abstract]:Based on the ABAQUS/Explicit platform, the finite element model of double rotary wheel coreless die shrinkage forming for high strength steel pipe is established. The single pass diameter shrinkage spinning forming process is numerically simulated, and the stress of spinning forming is obtained. The effect of strain distribution and process parameters on the forming quality is verified by experiments. The results show that the maximum residual stress occurs in the straight wall and the outer surface of the open end. The maximum equivalent strain appears in the transition part between conical shrinkage and straight wall, in the straight wall and the outer surface of the open end, the stress and strain concentration region is prone to excessive thinning in the spinning process, and with the increase of the reduction 螖, the maximum thickness thinning increases. With the increase of feed ratio f, the maximum thinning of wall thickness decreases, the cylinder degree decreases, but the average external diameter is larger than the ideal value by 1.0 mm 路r ~ (-1). With the increase of radius r 蟻, the maximum thinning of wall thickness decreases and the cylindrical degree decreases, but the roundness along the axial section is the smallest at r 蟻 10 mm.
【作者单位】：华南理工大学机械与汽车工程学院;广州民航职业技术学院;
【基金】：广东省公益研究与能力建设专项项目(2016A010102011)
【分类号】：TG306

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