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针对固定圆弧半径R=180 mm差厚拼焊板,利用Dynaform数值模拟仿真技术,研究了随位置变化压边力和随行程变化压边力两种变压边力控制方式对横向圆弧焊缝拼焊板的焊缝移动及回弹的影响,研究发现:在随位置变化压边力条件下,一定范围内的压边力既能控制差厚拼焊板的焊缝移动量又能控制拼焊板的回弹角,利于板料成形。但压边力的变化超过这个范围,利于拼焊板回弹的控制,却不利于拼焊板焊缝移动的控制。在随行程变化压边力条件下,相比其他加载方式,V型加载方式既利于拼焊板的焊缝移动量的控制又利于拼焊板回弹的控制,对拼焊板的成形有着重要的影响。变压边力控制技术包括随位置变化和随行程变化的压边力,在板料成形中允许更多薄侧板料流入凹模,减少拼焊板薄侧材料的变形,缓解拼焊板由于厚度差引起的变形不均匀,控制拼焊板的焊缝移动量和回弹角,从而提高拼焊板的成形质量。
Aiming at the welding thick-walled tailor welded plate with fixed radius of R = 180mm, Dynaform numerical simulation technique was used to study the effect of two types of variable blank holder force control methods, including the position change blank holder force and blank holder force, on transverse circular arc welding The results show that under the condition of changing blank holder force, the blank holder force in a certain range can control both the weld movement and the control Tailor welded plate rebound angle, which is conducive to sheet metal forming. However, the variation of blank holder force exceeds this range, which is good for the control of tailor-made blanket rebound but not conducive to the control of tailor-welded seam weld movement. Compared with other loading methods, under the condition of blank holder force changing with stroke, the V-type loading method is not only conducive to controlling the welding seam movement of the tailor-welded plate but also to controlling the rebound of the tailor-welded plate, which is important for forming the tailor welded plate Impact. Variable Billet force control technology includes the position changes along with stroke changes with the blank holder force in the sheet metal forming allow more thin-sheet flow into the die to reduce the deformation of the tailor-welded sheet material, ease the tailor-made due to Uneven thickness caused by the deformation is not uniform, control the amount of welding tailored welding seam movement and rebound angle, so as to improve the forming quality of the tailor welded plate.