拉弯辅助渐进成形直壁件试验研究  

Experimental Study on Incremental Forming Assisted Bending and Stretching Strategy for Vertical Walls Parts

作　　者：安传海 王辉[1] 高霖[1] 王德亮[1] 

机构地区：[1]南京航空航天大学机电学院,南京210016

出　　处：《机械科学与技术》2016年第3期420-424,共5页Mechanical Science and Technology for Aerospace Engineering

摘　　要：针对传统直壁件多道次渐进成形工艺存在的路径规划复杂、加工时间长、壁厚过度减薄的现状,提出了一种拉弯辅助渐进成形直壁件的新工艺。该工艺包含三个步骤:预成形、拉弯组合成形直壁和校形。基于此工艺进行了试验研究,结果表明:拉弯组合成形直壁件壁厚减薄程度小,壁厚分布均匀,加工时间明显缩短,更加符合实际生产的需要;预成角直接决定直壁件最终壁厚,预成形角越大,壁厚减薄越大;在周向压应力的作用下,直壁部分出现局部区域增厚现象,且预成角越小,增厚区域越大。Disadvantages in traditional multi-stage forming of vertical walls can be summarized as complexity of process planning,long machining time consuming and severe thinning. Aiming at this situation,a new bending and stretching strategy is put forward,which consists of three stages： performing,bending and stretching and finishing for vertical walls. Experiments are carried out based on the new technology,and the result shows that： the new strategy has access to the vertical wall products with small thinning and more uniform thickness distribution in vertical wall. Furthermore,the processing time is significantly short so as to cater for production requirement;preformed angle directly determines the final wall thickness. Through increasing the preformed angle,the wall thickness is sharply declined; because of the influence of the circumferential stress,the increase in thickness occurred in local area of vertical walls,and the thickened area get larger with the decline of the preformed angle.

关 键 词：拉弯组合 渐进成形 直壁件 预成形角 

分 类 号：TG386[金属学及工艺—金属压力加工] TG376.9