弧形悬垂实体结构激光熔覆成形  

Laser cladding forming of arcuate cantilevered entity part

作　　者：邓志强 石世宏[1] 周斌[1] 贾帅[1] 王聪[1] Deng Zhiqiang Shi Shihong Zhou Bin Jia Shuai Wang Cong(School of Mechatronics Engineering, Soochow University, Suzhou 215021, China)

机构地区：[1]苏州大学机电工程学院,江苏苏州215021

出　　处：《红外与激光工程》2017年第10期107-112,共6页Infrared and Laser Engineering

基　　金：国家重点研发计划(2016YFB1100300);江苏省重点研发项目(BE2015067)

摘　　要：运用6轴机器人及光内送粉技术进行弧形悬垂实体结构成形,提出了空间变姿态径向搭接方法:熔覆头沿圆弧切线方向连续变姿态,径向多道搭接。探讨了熔覆喷头堆高自适应区间,推导了离焦量在-5.5^-1.5 mm时,单道熔层生长量随离焦量变化的量化关系式,并加以实验验证。对成形悬垂实体件检测结果表明:成形件表面平整,过渡平缓无阶梯效应;不同倾角下成形件厚度长度均匀,各尺寸精度均接近建模要求;电镜组织分析表明不同倾角下各处显微组织均匀致密无明显差别。对成形件作硬度检测,其硬度分布与电镜组织保持相同变化规律。By using 6-axis robot and inside laser powder feeding technology to form the arcuate cantilevered entity part, and a way of variable posture and radial overlap laser cladding was proposed. This experiment discussed the cladding nozzle self-healing effect and deduced the quantitative relation between the single track height and the laser defocus when the defocusing amount ranged from -5.5 mm to -1.5 mm, and verified it by experimrent. The experiment result shows that the surface of formed part is flat and smooth without staircase effect; the thickness and length of formed part are uniform under different angle, and all the dimension precision meet the requirements of modeling, different angle almost has the same microstructure. The hardness keeps the same change rule with microstructure by testing the forming part hardness.

关 键 词：变姿态激光熔覆 悬垂实体 径向搭接 光内送粉 

分 类 号：TN249[电子电信—物理电子学]