锻压技术

基于圆弧形镦粗模合理体积分配的转向节成形工艺

英文标题：Forming technology of steering knuckle based on reasonable volume distribution for circular arc upsetting die

单位：1.合肥工业大学工业与装备技术研究院 2.合肥美的洗衣机有限公司 3.合肥工业大学材料科学与工程学院 4.安徽星瑞齿轮传动有限公司

分类号：TG376.2

出版年,卷(期):页码：2022,47(9):7-11

摘要：

为降低转向节锻件的折叠缺陷和成形载荷，实现金属的合理分配，以复杂等级为S级的汽车转向节为研究对象，采用自由锻制坯(镦粗—杆部拔长—压扁)—预锻—终锻的成形工艺方案，利用Deform-3D软件对成形过程开展数值模拟，并通过实验验证，研究成形过程中的金属流动规律、等效应力等效应变分布以及载荷变化规律。结果表明：镦粗上模中部设计为圆弧形对金属起到了良好的分配作用，减少了预锻头部飞边以及折叠的缺陷。镦粗上模的圆弧半径为150 mm时，鼓形表面的损伤峰值最小。采用圆弧形镦粗上模和自由锻制坯—预锻—终锻的锻造成形方法，模拟获取的锻件无明显的成形缺陷，为转向节锻件的实际生产提供了理论指导。

In order to reduce the fold defect and forming load of steering knuckle forgings and realize the reasonable distribution of metal, for the automobile steering knuckle with complex grade of S-class, the forming process scheme of free forging billet (upsetting-rod flattening), pre-forging and final forging were adopted, and the forming process was simulated numerically by software Deform-3D. Then, the metal flow laws, the distributions of equivalent stress and equivalent strain, and the load change laws during the forming process were studied by experimental verification. The results show that the designed circular arc shape in the middle of upsetting upper die plays a good role in metal distribution, and the defects of flash and folding for the pre-forged head are reduced. When the arc radius of upsetting upper die is 150 mm, the damage peak value of drum surface is the smallest. Using the forging method of circular arc upsetting upper die and free

forging billet-pre-forging-final forging, the forgings obtained by the simulation have no obvious forming defects, which provides theoretical guidance for the actual production of steering knuckle forgings.

基金项目：

安徽省重点研究和开发计划项目（201904a05020075）；中央高校基本科研业务费专项资金资助（JZ2020HGTB0039）

曹洪（1995-），男，硕士 E-mail：1049334549@qq.com 通信作者：石文超（1988-），男，博士，副研究员 E-mail：shiwenchaohfut@hfut.edu.cn

参考文献：

[1]赵毅, 刘淑梅, 何文涛, 等. 汽车转向节热锻工艺分析及模具结构优化设计[J]. 精密成形工程, 2016, 8(3): 40-44.

Zhao Y, Liu S M, He W T, et al. Hot forging process analysis and die structure optimization design of automobile steering knuckle[J]. Journal of Netshape Forming Engineering, 2016, 8(3): 40-44.

[2]冯典东, 介路阳, 韩英, 等. 汽车转向节的铸造工艺模拟及优化[J]. 长春工业大学学报, 2022, 43(1): 28-34.

Feng D D, Jie L Y, Han Y, et al. Simulation and optimization of casting process of automobile steering knuckle[J]. Journal of Changchun University of Technology, 2022, 43(1): 28-34.

[3]赵宁, 张运军, 陈天赋, 等. V5型转向节臂部锻造开裂研究[J]. 塑性工程学报, 2017, 24 (3): 6-12.

Zhao N, Zhang Y J, Chen T F, et al. Arm forging crack of V5 type steering knuckle [J]. Journal of Plasticity Engineering, 2017, 24 (3): 6-12.

[4]张运军, 陈天赋, 杨杰, 等. 房车转向节整体模锻关键技术与模具装置研发[J]. 中国机械工程, 2018, 29(17): 2125-2130.

Zhang Y J, Chen T F, Yang J, et al. Development on key technologies and facilities of integral die forging for motorhomes steering knuckles [J]. China Mechanical Engineering, 2018, 29(17): 2125-2130.

[5]Li F J, Sun J Q, Bao J Q, et al. Failure analysis of truck steering knuckle[J]. Engineering Failure Analysis, 2022, 140: 106537.

[6]单际强. 乘用车转向节铝合金铸件金属型重力铸造缺陷成因及工艺优化研究[D]. 长春：长春理工大学, 2020.

Shan J Q. Causes of Defects in Aluminum Alloy Castings of Passenger Car Steering Knuckle by Metal Mold Gravity Casting and Process Optimization[D]. Changchun: Changchun University of Science and Technology, 2020.

[7]Jeon G T, Kim K Y, Moon J H, et al. Effect of Al6061 alloy compositions on mechanical properties of the automotive steering knuckle made by novel casting process[J]. Metals, 2018, 8(10): 857.

[8]李宇飞, 冯志军, 李泽华, 等. 挤压铸造高强度铝合金汽车转向节铸件[J]. 特种铸造及有色合金, 2019, 39(12): 1308-1311.

Li Y F, Feng Z J, Li Z H, et al. Squeeze casting of high strength aluminum alloy automobile steering knuckle[J]. Special Casting & Nonferrous Alloys, 2019, 39(12): 1308-1311.

[9]Zhou J, Lin L, Luo Y. The multi-objective optimization design of a new closed extrusion forging technology for a steering knuckle with long rod and fork[J]. International Journal of Advanced Manufacturing Technology, 2014, 72(9-12): 1219-1225.

[10]Zhang Y J, Cao S J, Huang M W, et al. Research and application of precision forging forming process for flat thin flash of automobile disc steering knuckle[J]. Procedia Manufacturing, 2020, 50: 32-36.

[11]韩利亚, 陈天赋, 甘万兵, 等. 高温转向节锻件自动化三维测量与精度检测技术[J]. 塑性工程学报, 2018, 25 (5): 53-59.

Han L Y, Chen T F, Gan W B, et al. Automatic three-dimensional measurement and precision inspection technology for high temperature steering knuckle forgings [J]. Journal of Plasticity Engineering, 2018, 25 (5): 53-59.

[12]成林, 张文明, 隋美丽. 热锻参数对汽车转向节力学性能的影响分析[J]. 热加工工艺, 2018, 47(9): 148-151.

Cheng L, Zhang W M, Sui M L. Effect of hot forging parameters on mechanical properties of automobile steering knuckle[J]. Hot Working Technology, 2018, 47(9): 148-151.

服务与反馈：

【文章下载】【加入收藏】