THE VBHF TO STUDY THE WELD-LINE MOVEMENT AND SPRINGBACK OF TAILOR-WELDED BLANKS WITH ARC-WELD-LINE

Abstract

Based on the tailor-welded blanks with the radius of 180 mm arc-weld-line,and use Dynaform numerical simulation techniques to study TWBs with the transverse arc-weld-line a under the variable blank holder force changing with travel distance or position,The research shows that a certain range of blank-holder force can control the weld-line movement of TWBs and the springback angle of TWBs under the condition of VBHF changing with position.But beyond the change of the blank holder force,it is beneficial to sheet metal forming,not to the control of springback angle.Compared with other methods,V loading method benefits for the control of the weld-line movement and springback control,it has great effect on the forming of welding plate under the condition of VBHF changing with travel distance.Variable blank-holder force control methods,including changing with position and changing with travel distance,allow more thin side in sheet metal forming into the die,and reduce the welding plate deformation of the thin side material,due to easing the tailor-welded plate thickness caused by uneven deformation.Finally,the weld-line movement and the springback angle controlled to improve the forming quality of welding plate