实际生产挤压管形或管材件时常伴有管壁弯曲,影响产品的外观质量,对于有平直度要求的零件成品率非常低。运用Deform-3D软件,对1060铝薄壁矩形管的成形过程进行模拟分析影响管壁平直度的因素,为模具设计与生产工艺提供参考依据。实验在室...实际生产挤压管形或管材件时常伴有管壁弯曲,影响产品的外观质量,对于有平直度要求的零件成品率非常低。运用Deform-3D软件,对1060铝薄壁矩形管的成形过程进行模拟分析影响管壁平直度的因素,为模具设计与生产工艺提供参考依据。实验在室温20℃,固体粉末润滑剂,2000 k N液压机设备环境下进行,在实验之前需要对坯料进行皂化处理。通过实体挤压件与模拟件的对比分析以及对实体件管壁壁厚的测量,发现实体件管壁平直度较模拟件弯曲并且壁厚不均匀。改变上、下模相对位置关系,上模中心向下模中心左边偏离0.2 mm,使得上、下模之间间隙不均匀。通过模拟结果分析表明,上、下模间隙不均匀是影响管壁平直度与壁厚不均匀的一个重要因素,而挤压速度对管壁的平直度影响不大,为实际生产和模具安装精度要求提供了参考。展开更多
Inner flange and side wrinkling often occur in rotary-draw bending process of rectangular aluminum alloy wave-guide tubes, and the distribution and magnitude of wrinkling is related to geometrical parameters of the tu...Inner flange and side wrinkling often occur in rotary-draw bending process of rectangular aluminum alloy wave-guide tubes, and the distribution and magnitude of wrinkling is related to geometrical parameters of the tubes. In order to study the effects of geometrical parameters on wrinkling of rectangular wave-guide tubes, a 3D-FE model for rotary-draw bending processes of thin-walled rectangular aluminum alloy wave-guide tubes was built based on the platform of ABA-QUS/Explicit, and its reliability was validated by experiments. Simulation and analysis of the influence laws of geometrical parameters on the wave heights of inner flange and side wrinkling were then carried out. The results show that inner flange wrinkling is the main wrinkling way to rectan- gular wave-guide tubes in rotary-draw bending processes, but side wrinkling cannot be neglected because side wrinkling is 2/3 of inner flange wrinkling when b and h are smaller. Inner flange and side wrinkling increase with increasing b and h; the influence of b on side wrinkling is larger than that of h, while both b and h affect inner flange wrinkling greatly. Inner flange and side wrinkling decrease with increasing R/h; the influence of h on inner flange and side wrinkling is larger than that of R.展开更多
文摘实际生产挤压管形或管材件时常伴有管壁弯曲,影响产品的外观质量,对于有平直度要求的零件成品率非常低。运用Deform-3D软件,对1060铝薄壁矩形管的成形过程进行模拟分析影响管壁平直度的因素,为模具设计与生产工艺提供参考依据。实验在室温20℃,固体粉末润滑剂,2000 k N液压机设备环境下进行,在实验之前需要对坯料进行皂化处理。通过实体挤压件与模拟件的对比分析以及对实体件管壁壁厚的测量,发现实体件管壁平直度较模拟件弯曲并且壁厚不均匀。改变上、下模相对位置关系,上模中心向下模中心左边偏离0.2 mm,使得上、下模之间间隙不均匀。通过模拟结果分析表明,上、下模间隙不均匀是影响管壁平直度与壁厚不均匀的一个重要因素,而挤压速度对管壁的平直度影响不大,为实际生产和模具安装精度要求提供了参考。
基金financial support of the National Natural Science Foundation of China (No. 50975235 and 50575184)the 111 Project(B08040)
文摘Inner flange and side wrinkling often occur in rotary-draw bending process of rectangular aluminum alloy wave-guide tubes, and the distribution and magnitude of wrinkling is related to geometrical parameters of the tubes. In order to study the effects of geometrical parameters on wrinkling of rectangular wave-guide tubes, a 3D-FE model for rotary-draw bending processes of thin-walled rectangular aluminum alloy wave-guide tubes was built based on the platform of ABA-QUS/Explicit, and its reliability was validated by experiments. Simulation and analysis of the influence laws of geometrical parameters on the wave heights of inner flange and side wrinkling were then carried out. The results show that inner flange wrinkling is the main wrinkling way to rectan- gular wave-guide tubes in rotary-draw bending processes, but side wrinkling cannot be neglected because side wrinkling is 2/3 of inner flange wrinkling when b and h are smaller. Inner flange and side wrinkling increase with increasing b and h; the influence of b on side wrinkling is larger than that of h, while both b and h affect inner flange wrinkling greatly. Inner flange and side wrinkling decrease with increasing R/h; the influence of h on inner flange and side wrinkling is larger than that of R.
