SLA对薄板件表面成型精度的影响
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摘要
为了提高光固化成型技术(SLA)的成型精度,以薄板件的翘曲变形为研究对象,分析了SLA成型过程中的变形机理,从表面形貌、尺寸精度和变形量等角度分析了SLA对薄板件表面成型精度的影响。结果表明:薄板件最大变形发生在边界区域,靠近基座部分与薄板下表面处产生台阶,Z方向尺寸大于理论值,X、Y方向尺寸及薄板上表面与侧面的夹角小于理论值。
In order to improve the forming accuracy of light curing forming(SLA), the warping deformation of thin plate part was studied. The deformation mechanism during SLA forming was analyzed. The influence of SLA on the surface forming accuracy of sheet metalwas analyzed from the aspects of surface morphology, dimensionalaccuracy and deformation. The results indicate that: the maximum deformation of thin plate part occurs in the boundary region, and steps are formed near the base and the lower surface of the thin plate part. The Z-direction dimension is larger than the theoreticalvalue, the X-and Y-direction dimension and the angle between the surface and the side of the Thin plate part are smaller than the theoreticalvalue.
In order to improve the forming accuracy of light curing forming(SLA), the warping deformation of thin plate part was studied. The deformation mechanism during SLA forming was analyzed. The influence of SLA on the surface forming accuracy of sheet metalwas analyzed from the aspects of surface morphology, dimensionalaccuracy and deformation. The results indicate that: the maximum deformation of thin plate part occurs in the boundary region, and steps are formed near the base and the lower surface of the thin plate part. The Z-direction dimension is larger than the theoreticalvalue, the X-and Y-direction dimension and the angle between the surface and the side of the Thin plate part are smaller than the theoreticalvalue.
引文
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[3]Onuh S O,Hon K K B.Improving stereolithography part accuracy for industrial applications[J].International Journal of Advanced Manufacturing Technology,2001,17(1):61-68.
[4]Santler G,K?rcher H,Gaggl A,et al.Stereolithography versus milled three-dimensional models:Comparison of production method,indication,and accuracy[J].Computer Aided Surgery,1998,3(5):248-256.
[5]郭辰光,李威力,李源,等.铺层取向对光敏树脂固化快速成型构件力学性能影响[J].塑料工业,2016,44(3):111-114.
[6]Zhou J G,Herscovici D,Chen C C.Parametric process optimization to improve the accuracy of rapid prototyped stereolithography parts[J].International Journal of Machine Tools&Manufacture,2000,40(3):363-379.
[7]朱超,宋莉莉,孙万麟.光固化快速成型精度分析及实验研究[J].机械,2015,42(9):20-23,48.
[8]徐红玉,张元冲,卢秉恒,等.光固化快速成形过程中树脂固化零件变形的数值模拟[J].机械工程学报,2004,40(6):107-112.
[9]徐芝纶.弹性力学[M].北京:高等教育出版社,2016.
[10]刘杰.光固化快速成型技术及成型精度控制研究[D].沈阳:沈阳工业大学,2014.
[11]王广春,赵国群.快速成型与快速模具制造技术及其应用[M].北京:机械工业出版社,2016.