苏烨琳 王小海 陈善飞 李武君 童浩

摘要：汽车一体式热成型门环具有轻量化、强度高、碰撞性能好等优点，但由于零件体积大，定位复杂，模具状态匹配难度大，从而导致一体式门环成型精度差，局部易变形，控制难度大，难以达到生产所需制造精度的要求，目前国内自主品牌车型尚无量产门环。通过某款新车型研发试制，对汽车一体式门环尺寸精度提升进行了系统研究，采用迭代回弹补偿模具型面、调试模具保压间隙、门环定位基准优化和铰链安装面公差偏置等尺寸精度控制措施，并分别在试制阶段和预量产阶段用门环检具检测了6台样品。结果表明，采用精度控制措施后，门环总体制造精度合格率从试制阶段的87.75%提升至预量产阶段的95.90%。

关键词：一体式门环;尺寸精度;热成型;精度控制

中图分类号：U463.85文献标志码：A文章编号：1009-9492（2021）11-0269-04

Accuracy Improment of Automotive Integrated Door Ring

SuYelin，Wang Xiaohai，Chen Shanfei，Li Wujun，Tong Hao

（GAC Research&Development Center Co.， Ltd.， Guangzhou 511434， China）

Abstract： The hot forming integraled door ring has unique advantages on weight reduction， strength improvement and excellent capability of crash. While it is difficult to control the dimensional accuracy and likely to deform in part because of large in size， complicated location and difficultmatchingofthemould. Forthemomentintegrateddoorringhasn′ tbeenusedbyanydomesticautomobilecompany. Dimensional accuracy of automotive integrated door ring was researched systematically by a new car model development， including iterative springback compensation of the moulding surface， adjustion of the mould holding clearance， optimization of the door ring locating datum and tolerance offset of the hinge fixing surfaces. Six samples were tested with door ring inspection tools in the trial production stage and pre mass production stage. The results show that after the precision control measures are adopted， the overall manufacturing precision qualification rate of the door ring is increased from 87.75% in the trial production stage to 95.90% in the pre mass production stage.

Key words： intergrated door ring; dimensional accuracy; hot forming; accuracy control

0 引言

热成型零件具有精度高、成型质量好等优点，目前主要应用在汽车 A 柱、B 柱、门槛等结构件中[1-3]。汽车一体式门环是将激光拼焊板应用在侧围前部热成型件中，形成 A 柱加强板、上边梁加强板、B 柱加强板、门槛加强板一体成型的热成型门环技术[4-5]。一体式门环的优点非常明顯：提高了整体的刚度，可以保证良好的能量传递和抗碰撞性能[6];简化生产过程和后期焊接的工序，降低工厂焊接设备、检具和人力投入;可以选择不同材料、不同料厚的板料进行激光拼焊，整体减重达20%左右[7]，同时具有最佳的材料利用率[8]，零件数量减少19%，焊点数量减少49%，生产时间缩短21%[9]。……