摘要
现有薄壁倾斜件增材成形多以直壁件参数为指导,易出现成形质量低、形貌难控制等问题,本文提出单层等距偏移法,对倾斜结构件进行脉冲电弧增材研究。主要分析工艺参数对极限倾斜成形能力的作用机理,用响应面法建立峰值电流、焊接速度等工艺参数与倾斜结构形态的数学模型,深入解析工艺参数对倾斜成形角和有效壁厚的影响规律。结果表明:增大热输入和送丝量能提高自支撑极限成形能力,单层偏移量最大可达1.2 mm、极限成形角度最小为16.72°。偏移值与送丝速度的交互作用对倾斜件成形角和有效厚度的影响最显著;当送丝速度较小时,增加偏移值可增大成形角度范围。成形变曲率中空筒形件,对比试验误差小于6%,证明模型有效。
Aiming at the problems of low forming quality and difficult shape control of thin-walled inclined parts,a single-layer equidistant offset method was proposed to conduct pulsed arc additive experiments on inclined structural parts. In this paper,the action mechanism of process parameters on the ultimate tilting ability was analyzed,and the regression model of tilting structure morphology on peak current,welding speed,wire feeding speed,and offset was established by using the response surface method. The effects of process parameters on the inclined forming angle and effective wall thickness were deeply analysised. The results show that with the increase of wire feeding speed,the maximum deviation of a single layer can reach 1.2 mm,the minimum forming angle is 16.72°,and increasing the heat input and wire feeding amount can significantly improve the selfsupporting ultimate forming ability. The interaction between the offset value and the wire feeding speed has the most significant effect on the forming angle and effective thickness of the inclined parts. When the wire feed speed is low,increasing the offset value can increase the forming angle range. Finally,through additive forming of deformed curvature hollow cylindrical parts,the experimental error is within 6%,which proves the validity of the model.
作者
白少昀
吕彦明
潘宇
黄强
刘昊程
BAI Shaoyun;LÜYanming;PAN Yu;HUANG Qiang;LIU Haocheng(School of Mechanical Engineering,Jiangnan University,Wuxi 214122,China;Jiangsu Key Laboratory of Advanced Food Manufacturing Equipment Technology,Wuxi 214122,China)
出处
《兵器材料科学与工程》
CAS
CSCD
北大核心
2022年第4期94-100,共7页
Ordnance Material Science and Engineering
关键词
倾斜结构
电弧增材制造
倾斜角度
偏移量
工艺建模
tilted structure
arc additive manufacturing
slope angle
offset value
process modeling
