With the restriction of the diameter and feed direction of the cutting tool in milling process, electric discharge machining (EDM) is the only effective machining technology for the uncut regions with internal sharp corner. Automatic design of the electrode is of great significance for the CAD/CAM integration of EDM technology. In current CAD/CAM system the electrode design is done manually by technologists based on experience and knowledge. The procedure is tedious and timeconsuming. In this paper, a novel approach is proposed to automatically generate the electrode CAD model taking the topological vertices of uncut region as the hint. The hint feature points are innovatively defined and classified into three types: internal-sharp points, cutting-into points and interacting points. Based on this, our approach firstly determines the faces and the type of uncut region. Secondly, the interacting region is decomposed into the isolated region by reconstructing the topological structure, patching the split face and partitioning the shared face. Thirdly, the modeling parameters are extracted from the isolated region. Finally, the electrode CAD model is created by executing a set of generic modeling operations. The electrode CAD model can be directly used in the process planning, so as to promote the integration of CAD and CAM.
With the rising number of electric and hybrid vehicles the demand for customerfriendly and innovative solutions for the charging infrastructure is growing steadily. Furthermore, future autonomous driving and parking vehicles are calling for new approaches regarding to battery charging. Nowadays electric vehicles have to be charged by hand. In other words, someone has to connect the charging cable with the charging socket of the vehicle. This paper deals with automated charging systems for electric vehicles. In order to realize tethered charging a fully automated system supports the complete process. The first part of work explains advantages of automated conductive charging systems regarding to other automated concepts and why such systems are needed. The second part deals with an investigation of the state of art. Thereby it is evidenced which systems are already developed and published. Afterwards, challenges and problems behind automated conductive systems are shown. Thereby the individual problems are analysed and illustrated. Finally, an initial concept for automated charging station is presented and discussed as a solution charging multiple and various types of vehicles at public parking facilities.
High relief is a sculpture where more than half of 3D figure is attached onto a background plane. The main problem of high relief modeling from 3D object is how to transform the 3D geometry within limited depth range. This paper presents a novel method to generate high reliefs, which benefits from the technique of Laplacian-based mesh deformation. Given a 3D object as input, we first select a set of handle points on the input model and compute their offset distances to the background. Taking these handle points as constraints, we then optimize the depth field by solving a bi-Laplacian-based linear system. The deformed object is ensured to attach onto the background with preserved depth structure and geometrical details. Our method is effective in dealing with different types of input shapes, even the ones with topology-disconnected components. Experimental results and comparisons with previous method demonstrate the effectiveness of the proposed method.
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