玻璃模压成形用微沟槽磷化镍模具的超精密切削加工

发布时间：2018-02-01 02:27

本文关键词： 模具制造磷化镍镀层微沟槽切削脆塑转变模压成形　出处：《光学精密工程》2017年12期 　论文类型：期刊论文

【摘要】：最佳邻接量是高精度加工玻璃模压成形用磷化镍镀层材料微沟槽模具的重要参数。本文提出了一种利用小角度微沟槽交叉切削技术快速确定微沟槽最佳邻接量极限范围的方法。该方法利用沟槽小角度交叉切削材料去除形式与沟槽邻接切削相近的特点,对微沟槽邻接量的极限范围进行预测。首先,以沟槽交叉角度和交叉沟槽深度为变量设定切削条件,得到多组渐变棱;然后,观测交叉渐变棱形貌并结合材料塑性变形法则与脆塑转变理论分析棱边上的材料去除状态;通过观察交叉渐变棱与沟槽邻接脊部在切削过程中去除材料的截面形貌建立二者的关系;最后,分析交叉渐变切入棱与切出棱形貌的差异,确定脆塑转变的邻接量范围。基于上述方法,观测了交叉渐变棱的形貌并进行几何计算,确定磷化镍模具微沟槽邻接切削产生脆性剥离现象的临界邻接量范围为570~720nm。利用微沟槽模具超精密切削加工实验验证了该方法的有效性,加工出了高质量模具并用于微沟槽玻璃模压成形,实现了玻璃微沟槽的精密制造。
[Abstract]:The optimal contiguity is an important parameter of micro-groove die for high-precision processing glass molded with nickel phosphide coating. In this paper, a rapid determination of optimum adjacent polarity of micro-groove by using small angle micro-groove cross-cutting technique is presented. The method utilizes the characteristics that the material removal form of groove small angle cross cutting is close to that of groove adjacent cutting. The limit range of the adjacent amount of microgroove is predicted. Firstly, the cutting conditions are set with the cross angle and the depth of the cross groove as variables, and many groups of progressive edges are obtained. Then, the morphology of cross gradient edge is observed and the material removal state on edge is analyzed by combining the plastic deformation rule of material and the theory of brittle plastic transition. The cross section morphology of the material was observed during the cutting process by observing the cross gradient edges and the adjacent ridges of the grooves to establish the relationship between the two. Finally, the difference between the cross gradient shear edge and the cut out edge is analyzed, and the range of the adjacent amount of brittle plastic transition is determined. Based on the above method, the morphology of the cross gradient edge is observed and the geometric calculation is carried out. The critical contiguity range of brittle exfoliation in micro-groove adjacent cutting of nickel phosphide die is determined to be 570-720nm. the validity of this method is verified by ultra-precision cutting experiment of micro-groove die. The high quality die was machined and used in the die forming of micro groove glass, and the precision manufacture of glass micro groove was realized.
【作者单位】：北京理工大学机械与车辆学院;
【基金】：国家973重点基础研究发展计划资助项目(No.2015CB059900) 国家自然科学基金资助项目(No.51375050)
【分类号】：TG506
【正文快照】： (School of Mechanical Engineering,Beijing Institute of Technology,Beijing100081,China)*Corresponding author,E-mail:zhoutf@bit.edu.cn1引言光学玻璃微沟槽阵列具有降低光反射率、提高透射率和衍射效率以及控制光能谱分布等功能,是光电系统中重要的元器件[1]。光学微

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