冲裁断面质量对外缘翻边开裂影响的试验研究  

Experimental research on influence of blanking section quality on outer edge flanging cracking

作　　者：李慧远 宋建新 黄赓 宋霄鹰 张坤龙 Li Huiyuan;Song Jianxin;Huang Geng;Song Xiaoying;Zhang Kunlong(Guangzhou JFE Steel Sheet Company Ltd.,Guangzhou 511462,China)

机构地区：[1]广州JFE钢板有限公司,广东广州511462

出　　处：《锻压技术》2025年第1期108-112,共5页Forging & Stamping Technology

摘　　要：针对某DP980超高强钢汽车零件在正常冲压生产一段时间后出现的翻边开裂的问题,通过对冲裁模具刃口打磨再次实现正常生产,针对此现象,开展冲裁断面质量对外缘翻边开裂影响的试验研究。通过外形精度、断面轮廓和断面形貌等对比试验发现,发生翻边开裂的冲裁件的断面质量比翻边正常的冲裁件差,表明冲裁断面质量不好是造成翻边开裂的直接原因。采用研磨机对开裂批次的冲裁试样进行打磨,然后进行冲压测试,发现不再出现翻边开裂问题,再次证明提高冲裁断面质量可以解决翻边开裂问题。研究对车用超高强钢零件冲压厂具有一定的实践指导意义。For the problem of flanging cracking for a certain automotive part of DP980 ultra-high strength steel after a period of normal stamping production,the normal production was achieved again by grinding the blanking die edge,and the influences of blanking section quality on outer edge flanging cracking were researched.Then,through comparative tests on shape accuracy,cross-sectional profile and cross-sectional morphology,it was found that the section quality of blanking parts with flanging cracking was worse than that of blanking parts with normal flanging,indicating that the poor quality of the blanking section was the direct cause of flanging cracking.Furthermore,the banking samples of the cracked batch were polished by using the grinder,and the stamping tests were conducted.There is no longer a problem of flanging cracking,proving that improving the quality of blanking section solves the problem of flanging cracking.Thus,the research has certain practical guidance significance for the stamping factories of automotive ultra-high strength steel parts.

关 键 词：DP980超高强钢 冲裁 断面质量 外缘翻边 开裂 

分 类 号：TG386.2[金属学及工艺—金属压力加工]