商用车顶盖提质降本量产工艺优化及试验验证  

Mass Production Process Optimization&Test Verification For Quality Improvement and Cost Reduction of Commercial Vehicle Roof

作　　者：姜岩 李敬梓 富壮 寇兆阳 张凤君[1] 孟庆磊 Jiang Yan;Li Jingzi;Fu Zhuang;Kou Zhaoyang;Zhang Fengjun;Meng Qinglei(FAW Jiefang Automobile Co.,Ltd.,Changchun 130011)

机构地区：[1]一汽解放汽车有限公司,长春130011

出　　处：《汽车工艺与材料》2023年第5期31-34,共4页Automobile Technology & Material

摘　　要：为解决某商用车中顶盖振动和噪声问题,在中顶盖增加4片补强胶片,但增加了生产成本,且焊装贴补强胶片后经过涂装时易剥落。大型覆盖件出现振动和噪声的根本原因是零件刚度低,因此提出在满足减薄率要求的前提下增大加强筋高度。经过冲压分析、样件试制、路试验证最终确定中顶盖刚度提升方案为加强筋高度由3.0mm增加至7.5mm,同时解决零件拉延下转角开裂问题,以实现整体加大压边力、减少残余应力。取消补强贴片后单车成本节约45元。In order to reduce vibration and noise from central roof in commercial vehicles,4 reinforcing films were added to the central roof at additional production costs,and the films were easy to fall off after painting.The root cause of vibration and noise in large cover parts is the weak rigidity of the part,the paper therefore proposed to increase the height of the reinforcing rib while meeting the thinning rate requirements.After stamping analysis,prototype production and road test,the final solution to improve the rigidity of the center roof was to increase the height of the reinforcing rib from 3.0 mm to 7.5 mm.The problem of corner cracking in drawing was solved to increase crimping forces and reduce residual stresses.The cost per vehicle is reduced by 45 yuan by eliminating the reinforcing film.

关 键 词：商用车 中顶盖 NVH 刚性提升 冲压 

分 类 号：U468.21[机械工程—车辆工程]