Improvement of Seizure Resistance in Ironing of Aluminum Alloy Sheets and Stainless Steel Cups by Utilizing Laser Textured Die Having Lubricant Pockets
Improvement of Seizure Resistance in Ironing of Aluminum Alloy Sheets and Stainless Steel Cups by Utilizing Laser Textured Die Having Lubricant Pockets
复制标题
DOI：
10.3390/met13040803
复制
发表时间：
2023-04
期刊：
影响因子：
2.9
通讯作者：
Y. Abe;Mika Sugiura;Takumi Ando;Peerapong Kumkhuntod;Kamthon Septham;W. Daodon;K. Mori
中科院分区：
文献类型：
--
作者：
Y. Abe;Mika Sugiura;Takumi Ando;Peerapong Kumkhuntod;Kamthon Septham;W. Daodon;K. Mori
减薄过程中的卡滞会对零件质量和模具寿命产生负面影响。为了防止癫痫发作，必须改善润滑。在这项研究中，激光纹理模具与润滑剂的口袋，以提高抗咬合在铝合金板和不锈钢杯的熨烫。通过带式减薄实验研究了网格状、十字形和沟槽状等微凹坑排列方式对微凹坑抗咬合性能的影响。片材和模具材料分别为A1050-O铝合金和JIS SKD 11工具钢。此外，使用三维计算流体动力学模拟研究了影响承载能力的润滑剂流动的基本物理。将优化后的微凹坑阵列图案应用于硬质合金-钴（WC-Co）模具表面，对SUS 430不锈钢圆筒形杯进行了拉深成形。带式变薄试验结果表明，网格排列方式在高变薄率的变薄中是成功的。如模拟所示，网格阵列图案比交叉图案更多地增加了润滑剂的承载能力，从而改善了熨烫极限。不锈钢杯的随后的熨烫显示，当使用具有网格阵列图案的纹理化模具和没有极压添加剂的润滑剂时，与未纹理化模具相比，熨烫极限增加了6%，并且平均熨烫负荷降低了35%。抗咬合性得到改善，因为通过激光表面纹理化结构化的表面上的凹坑改善了在熨烫期间的承载能力。
Seizure during ironing negatively affects the quality of parts and die life. To prevent seizures, lubrication has to be improved. In this study, laser-textured dies with lubricant pockets were utilized to improve seizure resistance in the ironing of aluminum alloy sheets and stainless steel cups. The effects of array patterns of micro-pockets, such as grid and crossing array patterns with circular pockets, as well as a grooved array patterns on seizure resistance, were experimentally examined by strip ironing. The sheet and die materials were the A1050-O aluminum alloy and JIS SKD11 tool steel, respectively. Moreover, the underlying physics of the lubricant flow influencing the load-carrying capacity were investigated using three-dimensional computational fluid dynamics simulations. The optimum array patterns of the micro-pockets were then utilized on a tungsten carbide-cobalt (WC-Co) die surface for ironing SUS430 stainless steel cylindrical cups. The strip ironing results showed that the grid array pattern was successful in ironing sheets with a high ironing ratio. The grid array pattern increased the load-carrying capacity of the lubricant more than the crossing pattern, as demonstrated by the simulations, thereby improving the ironing limit. The subsequent ironing of stainless steel cups revealed that when using a textured die with a grid array pattern and lubricant without the extreme pressure additive in comparison to an untextured die, the ironing limit increased by 6% and the average ironing load decreased by 35%. The seizure resistance was improved because the pockets on the surface structured by laser surface texturing improved the load-carrying capacity during ironing.