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Micro-burrs in machining original molds of an optical functional film with a triangular pyramidal texture
Journal of Micromechanics and Microengineering ( IF 2.3 ) Pub Date : 2021-04-28 , DOI: 10.1088/1361-6439/abfa7d
Huang Li , Zhilong Xu

During the cutting process of the original molds, the micro-burrs produced by the machining process will affect the optical properties of the optical functional textured film. According to the forming planing method for the triangular pyramid texture, the formation characteristics of burrs are analyzed from the cut-in edge and the cut-out edge. And the influence of burrs on the triangular pyramid edge is analyzed in combination with the changes of cutting section, to obtain the prediction model of edge burr distribution. The cutting simulation of triangular pyramid texture shows that the main flow direction of the chips will be inclined along the side where the cutting edge is separated from the workpiece first, resulting in a larger exit burr size on this side. In the cut-out stage, as the contact length between the cutting edge of the tool and the workpiece decreases gradually, the maximum cutting stress gradually transfers to the tool tip so that the positive burrs form at the bottom of the cut-out edges of the triangular pyramid. The forming processing experiment for the triangular pyramid texture shows that there are both positive and negative exit burrs on the cut-out edges. Compared with the forming processing method, the V-shaped section of the cutting layer is changed to the trapezoidal section of the free chips when the original molds with triangular pyramid texture are cut by the single-edge cutting method. As the chips flow more smoothly, the size of burrs can be reduced. Besides, the ratio of the effective optical functional area K s can increase 10.1%.



中文翻译:

三角锥纹理光学功能膜原模加工中的微毛刺

在原始模具的切割过程中,机械加工过程中产生的微毛刺会影响光学功能纹理膜的光学性能。根据三棱锥织构的成形刨削方法,从切入边和切出边分析毛刺的形成特征。并结合切削截面的变化分析毛刺对三角锥边缘的影响,得到边缘毛刺分布的预测模型。三棱锥织构的切削模拟表明,切屑的主要流动方向会沿着切削刃首先与工件分离的一侧倾斜,导致该侧的出口毛刺尺寸较大。在裁员阶段,随着刀具切削刃与工件的接触长度逐渐减小,最大切削应力逐渐转移到刀尖,从而在三棱锥切削刃的底部形成正毛刺。三棱锥织构的成形加工实验表明,在切割边缘处有正负出口毛刺。与成型加工方法相比,采用单刃切削方法切削具有三棱锥纹理的原始模具时,切削层的V形截面变为自由切屑的梯形截面。由于切屑流动更顺畅,毛刺的尺寸可以减小。此外,有效光学功能面积的比率 最大切削应力逐渐转移到刀尖,从而在三棱锥切割边缘的底部形成正毛刺。三棱锥织构的成形加工实验表明,在切割边缘处有正负出口毛刺。与成型加工方法相比,采用单刃切削方法切削具有三棱锥纹理的原始模具时,切削层的V形截面变为自由切屑的梯形截面。由于切屑流动更顺畅,毛刺的尺寸可以减小。此外,有效光学功能面积的比率 最大切削应力逐渐转移到刀尖,从而在三棱锥切割边缘的底部形成正毛刺。三棱锥织构的成形加工实验表明,在切割边缘上有正负出口毛刺。与成型加工方法相比,采用单刃切削方法切削具有三棱锥纹理的原始模具时,切削层的V形截面变为自由切屑的梯形截面。由于切屑流动更顺畅,毛刺的尺寸可以减小。此外,有效光学功能面积的比率 三棱锥织构的成形加工实验表明,在切割边缘上有正负出口毛刺。与成型加工方法相比,采用单刃切削方法切削具有三棱锥纹理的原始模具时,切削层的V形截面变为自由切屑的梯形截面。由于切屑流动更顺畅,毛刺的尺寸可以减小。此外,有效光学功能面积的比率 三棱锥织构的成形加工实验表明,在切割边缘上有正负出口毛刺。与成型加工方法相比,采用单刃切削方法切削具有三棱锥纹理的原始模具时,切削层的V形截面变为自由切屑的梯形截面。由于切屑流动更顺畅,毛刺的尺寸可以减小。此外,有效光学功能面积的比率 由于切屑流动更顺畅,毛刺的尺寸可以减小。此外,有效光学功能面积的比率 由于切屑流动更顺畅,毛刺的尺寸可以减小。此外,有效光学功能面积的比率K s可以增加10.1%。

更新日期:2021-04-28
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