论文部分内容阅读
为了提高渐进成形过程中板料的成形极限和加工效率,提出了胀形-渐进成形的复合成形方法,通过胀形-渐进成形复合成形锥形件实验,研究了DC04钢板胀形-渐进成形复合成形锥形件和纯渐进成形锥形件的成形极限角和应变变化以及壁厚分布规律。结果表明:预成形高度为h=15 mm和h=25 mm时,复合成形零件的成形极限角分别为α极=66°和α极=69°;采用胀形-渐进成形复合成形锥形件,当胀形的最大减薄量发生在局部渐进成形区内,并且胀形和渐进成形的最大减薄量位置方向相反时,锥形件壁厚趋于均匀,提高了胀形-渐进成形的复合成形能力。
In order to improve the forming limit and processing efficiency of sheet metal during progressive forming, a composite forming method of bulging-progressive forming was proposed. Through the experiment of bulging-progressive forming composite forming cone, Forming cones and pure progressive forming cones forming limit angle and strain changes and the distribution of wall thickness. The results show that the forming limit angles of composite forming parts are α pole = 66 ° and α pole = 69 ° at the pre-forming height of h = 15 mm and h = 25 mm, respectively. , When the bulging of the maximum amount of reduction occurs in the local progressive forming zone, and bulging and progressive forming the maximum amount of reduction in the opposite direction, the tapered wall thickness tends to be uniform, increased bulging - progressive forming Compound forming ability.