SLM成形AlSi10Mg倾斜薄壁件壁厚响应面法优化  

Wall thickness optimization of laser-melted AlSi10Mg inclined thin-wall parts by response surface method

作　　者：姚耀伍 许明三 曾寿金[1,2] 叶建华 韦铁平[1,2] YAO Yaowu;XU Mingsan;ZENG Shoujin;YE Jianhua;WEI Tieping(School of Mechanical and Automotive Engineering, Fujian University of Technology, Fuzhou 350118, China;Advanced Manufacturing Productivity Promotion Center of FJUT, Fuzhou 350118, China)

机构地区：[1]福建工程学院机械与汽车工程学院,福建福州350118 [2]福建工程学院先进制造生产力促进中心,福建福州350118

出　　处：《福建工程学院学报》2022年第1期19-26,共8页Journal of Fujian University of Technology

基　　金：福建省自然科学基金(2020J01872)。

摘　　要：针对激光选区熔化成形倾斜薄壁件尺寸精度低、成形质量差等问题,应用响应曲面法研究工艺参数及倾斜角度对薄壁件壁厚的影响,建立倾斜角度、工艺参数与壁厚相对误差关系模型。结果表明:倾斜角度对壁厚的影响最大,激光功率次之。由于倾斜角度改变,薄壁件悬垂面粉末支撑区域不同,导热效果存在差异,激光功率与扫描间距对于不同倾斜角度的薄壁件壁厚影响不同。其中,激光功率对45°倾斜薄壁件壁厚的影响最大,当激光功率选择150~350 W时,壁厚相对误差最大差值为24%;而扫描间距对90°倾斜薄壁件壁厚的影响最大,当扫描间距选择0.1~0.2 mm时,壁厚相对误差最大差值为9.5%,合理的工艺参数能够有效降低壁厚相对误差。In order to solve the problems of low dimensional accuracy and poor forming quality in laser selective melting forming of inclined thin-walled parts,the influence of process parameters and inclination angle on the wall thickness was studied by response surface method,and the relative error model of inclination angle,process parameters and wall thickness was established.Results show that the inclination angle has the greatest effect on the wall thickness,followed by laser power.Due to the change of inclination angle,the thermal conductivity of thin-walled parts is different due to the different support areas of overhanging end.Laser power and scanning spacing have different effects on the thickness of thin-walled parts with different inclination angles.Laser power has the greatest influence on the wall thickness of parts with a 45°inclination angle.When the laser power is 150 W to 350 W,the maximum relative error of the wall thickness is 24%.The scanning spacing has the greatest influence on the wall thickness of parts with a 90°inclination angle.When the scanning spacing is between 0.1 mm and 0.2 mm,the maximum difference of the wall thickness relative error is 9.5%.Reasonable processing parameters can effectively reduce the wall thickness relative error.

关 键 词：激光选区熔化 响应面 倾斜薄壁件 壁厚 相对误差 

分 类 号：TN249[电子电信—物理电子学] TG174.4[金属学及工艺—金属表面处理]