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针对板材拉深成形过程中摩擦恶劣难题,提出一种外部加压强制润滑拉深工艺,接触间隙中形成的压力油膜可以有效减小板材与模具真实接触面积,改善润滑条件。设计了一套强制润滑拉深模具,在20～50 k N区间内3组压边力条件下,进行了5和9 MPa强制润滑拉深实验,与聚乙烯薄膜、高纯度二硫化钼颗粒、植物油、水性矿物质润滑油等常用润滑介质在相同工艺条件下做横向对比实验,并量化评价强制润滑效果。实验结果表明,高纯度二硫化钼颗粒润滑效果最好,植物油润滑效果最差,水性矿物质润滑油加压后润滑效果有明显提升, 9 MPa压力下成形件高度最大提高了17.97%,成形力最大降低了8.9%,最大壁厚减薄率降低了32.7%。9 MPa压力下润滑效果好于5 MPa。
Abstract：Aiming at the problem of severe friction during the deep drawing process of sheet metal, an external pressure forced lubrication deep drawing process was proposed. The pressure oil film formed in the contact gap can effectively reduce the actual contact area between the sheet metal and the dies, and improve lubrication conditions. A set of forced lubrication deep drawing die was designed. Under three sets of blank holder force conditions in the range of 20-50 k N, 5 and 9 MPa forced lubrication deep drawing experiments were carried out to make horizontal comparative experiments with commonly used lubricating media such as polyethylene film, high-purity molybdenum disulfide particles, vegetable oil and water-based mineral lubricant under the same process conditions, and the effect of forced lubrication was quantitatively evaluated. The experimental results show that the lubrication effect of high-purity molybdenum disulfide particles is the best, the lubrication effect of vegetable oil is the worst, the lubrication effect of water-based mineral lubricant after pressurization has been significantly improved. Under pressure of 9 MPa, the maximum increase in forming height is 17. 97%, the maximum reduction in forming load is 8. 9%, the maximum wall thickness reduction decreases by 32. 7%. The lubrication effect pressure of 9 MPa is better than that of 5 MPa.
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基本信息:
中图分类号:TG386;TH117.2
引用信息:
[1]陈端,赵长财,陈晓沂,等.强制润滑拉深工艺及润滑效果量化评价[J].塑性工程学报,2025(03):64-70.
基金信息:
山西省高等学校科技创新项目(2024L248); 来晋工作优秀博士资助项目(20242014); 太原科技大学科研启动基金资助项目(20232119)
2025-04-07
2025-04-07
2025-04-07