CAJ | 학술논문

基于Dynaform平台,就差厚拼焊板外缘径向辅助加压充液拉深工艺进行分析与研究,并以成形件最终壁厚分布和焊缝移动量作为评定标准,通过与传统拉深工艺对比,找出差厚拼焊板在拉深过程中焊缝移动所特有的共性.即在成形件底部焊缝向厚板侧移动,并在直壁处逐渐过渡到薄板侧.模拟结果显示,合理控制液室模腔中的充液压力、合理设计薄、厚板两侧的压边力及其分布、选择恰当的径向辅助压力能极大地提高拼焊板坯的成形性,并使成形件壁厚分布均匀,焊缝移动量小.
기우Dynaform평태,취차후병한판외연경향보조가압충액랍심공예진행분석여연구,병이성형건최종벽후분포화한봉이동량작위평정표준,통과여전통랍심공예대비,조출차후병한판재랍심과정중한봉이동소특유적공성.즉재성형건저부한봉향후판측이동,병재직벽처축점과도도박판측.모의결과현시,합리공제액실모강중적충액압력、합리설계박、후판량측적압변력급기분포、선택흡당적경향보조압력능겁대지제고병한판배적성형성,병사성형건벽후분포균균,한봉이동량소.
Based on finite element simulation software Dynaform, the processes of square cup drawing using TWBS with different thickness in Hydro-mechanical deep drawing under independent radial hydraulic pressure and conventional drawing were discussed and studied. The influence of two methods of drawing on the forming quality was analyzed by taking wall-thickness distribution and weld-line movement as standard. The common features were found out about the character of wall-thickness distribution and weld-line movement during the processes of square cup drawing using TWBs with different thickness. On the bottom of square cup, the weld-line moves to the thick side, and moves toward the thin side gradually along the jamb wall. The results of simulation indicate that, controlling the independent radial hydraulic pressure in chamber pressure can obviously improve the forming quality with the reasonably design of blank holder force. And the wall thickness distributions and weld-line movement of formed cup are more uniform under the help of reasonable independent radial hydraulic pressure.