锻压技术

汽车转向节小飞边精锻技术的研发及应用

英文标题：Development and application on small flash precision forging technology for

作者：张运军陈天赋杨杰夏巨谌邓磊金俊松

分类号：TG316

出版年,卷(期):页码：2018,43(8):1-7

摘要：

以一种复杂程度达S4的转向节为研究对象，提出将传统的水平开式预锻和开式大飞边终锻改变为半闭式小飞边预锻成形和半闭式小飞边终锻成形的精锻工艺新方案。在采用经典塑性成形理论对小飞边的作用及其机理进行分析的基础上，采用热力耦合有限元进行了模拟分析，得到了等效应力、等效应变和温度分布场以及力形成曲线和变形规律，验证了工艺方案的正确性，并优化了预锻成形工艺。在程控锤和数控电动螺旋压力机上成功试制出转向节精密锻件，工艺试验结果与模拟结果吻合。新工艺方案的材料利用率为88％，较传统工艺方案提高了16%，且质量更好。

For a type of steering knuckle with complexity degree S4, the new method of precision forging process was proposed by changing the traditional horizontal open pre-forging and the open big flash final forging into a semi-closed small flash pre-forging and a semi-closed small flash final forging. Based on the analysis of action and mechanism of small flash by classical plastic forming theory, the simulation analysis was carried out by the thermodynamics coupled finite element method, and the equivalent stress, equivalent strain and temperature distribution fields as well as the force forming curve and deformation law were obtained. Then, the correctness of the process scheme was verified, and the pre-forging process was optimized. Furthermore, the steering knuckle precision forgings were successfully manufactured by the program control hammer and CNC electric screw press, and the process test result was the same as the simulation result. The material utilization ratio of the new process scheme is 88%, which is 16% higher than that of the traditional process,and the forgings by the new process have better quality.

基金项目：

湖北省技术创新专项重大项目（2017AAA009）

张运军（1966-），男，学士，高级工程师 E-mail：hbshdz@263.com

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