Adaptive speed control for waterjet milling in pocket corners
Adaptive speed control for waterjet milling in pocket corners
复制标题
型腔拐角水射流铣削的自适应速度控制
DOI：
10.1007/s00170-019-03546-z
复制
发表时间：
2019
期刊：
影响因子：
--
通讯作者：
W. Rubio
中科院分区：
文献类型：
--
作者：
V. Bui;P. Gilles;T. Sultan;G. Cohen;W. Rubio
使用传统制造工艺铣削薄钛合金工件是一项精细操作。在机械加工过程中，切削力会使零件变形，而由此产生的压缩应力实际上可以提高其机械性能。然而，当零件尺寸既大又薄时，加工产生的变形将与几何规格不相容。从这个角度来看，磨料水射流铣削提供了一个合适的替代解决方案。大量的工作提出的结果有关的铣削深度，表面特性和加工策略时铣削口袋。这些研究表明，铣削封闭型腔时方向的改变会产生由铣削表面上的射流能量分布或机器的运动学引起的缺陷。当强制使用腔圆角半径时，将沿半径小于指定半径的圆弧进行方向更改。在本文中，连续的圆形轨迹铣削宽度的分析，并采用了深度的预测模型。然后，该模型被用来提出一种铣削方法，该方法允许对凹穴深度施加半径和公差。
Milling thin titanium alloy workpieces using conventional manufacturing processes is a delicate operation. During machining, the cutting forces can deform the part, while resulting compressive stresses could actually enhance its mechanical properties. Nevertheless, when parts are both large in size and thin, deformation generated by machining will be incompatible with the geometrical specifications. From this perspective, abrasive waterjet milling offers a suitable alternative solution. Numerous works present the results relating to the depths milled, the surface characteristics and machining strategies when milling pockets. Such studies show that the change of direction when milling closed pockets generates defects arising from the distribution of the jet’s energy over the milled surface or the kinematics of the machine. When a pocket corner radius is imposed, changes of direction are made following circular arcs with a radius lower than the specified one. In the present paper, an analysis of the width milled during successive circular trajectories is presented and a predictive model for the depth is adopted. This model is then used to propose a milling method that allows both the imposed radius and tolerance on the pocket depth to be respected.