...Jun Wang; Zhigang Wang; Weidong Zhu; Yingfeng Ji This paper describes a method of machining feature recognition from a freeform surface based on the relationship between unique machining patches and critical points on a component’s surface. The method uses Morse theory to extract critical surface...

... with functional tolerances. To evaluate the impact of manufacturing defects on the quality of parts produced, designers simulate the influence of the error stack-up in different machining operations to check compliance with functional tolerances. This paper builds on the model of manufactured part...

...V. Capponi; F. Villeneuve The overall aim of the authors’ work is to create a computer aid to support the macroplanning of five-axis parts, and in this context this paper presents the methodology developed to enable the determination of set-up orientations on five-axis machine-tools. The process...

...Ahmad Barari; Hoda A. ElMaraghy; Waguih H. ElMaraghy This paper presents a computer aided design for machining (DFMc) platform that enables designers to customize the design for the available machine tools and to estimate the effect of design decisions on the accuracy of the final machined products...

... Interaction ,” Comput.-Aided Des. 0010-4485 , 36 ( 12 ), pp. 1129 – 1140 . Chen , Y. H. , Wang , Y. Z. , and Yang , Z. Y. , 2004 , “ Towards a Haptic Virtual Coordinate Measuring Machine ,” Int. J. Mach. Tools Manuf. , 44 ( 10 ), pp. 1009 – 1017 . 0890-6955 Yang , Z...

... pattern that characterizes all the features machined with that process. If such a model is available, it may be exploited to enhance geometrical inspection accuracy. In this paper, an approach for geometrical inspection of machined profiles is proposed. This approach consists in computing form deviations...

... for easy implementation. We describe an advanced CNC application that uses these four factors and show how STEP-NC AP-238 enhances CNC machining and measurement. 21 08 2006 10 07 2007 CAD/CAM computerised numerical control machine tools machining STEP-NC has been developed...

... in dealing with a workpiece change. Several systems have attempted to automate both the fixture layout design task and the figure configuration design task. Nnaji et al. ( 9 ) developed a framework for rule-based expert fixturing using the 3-2-1 locating principle. Given the machining operation...

...Jing Zhou; Derek Yip-Hoi; Xuemei Huang In order to optimize turning processes, cutting forces need to be accurately predicted. This in turn requires accurate extraction of the geometry of tool-workpiece engagements (TWE) at critical points during machining. TWE extraction is challenging because...

...Iain M. Boyle; Kevin Rong; David C. Brown Fixtures accurately locate and secure a part during machining operations. Various computer-aided fixture design (CAFD) methods have been developed to reduce design costs associated with fixturing. One approach uses a case-based reasoning (CBR) method where...

... of a δ ‐ F 4 can be controlled globally, with a unique minimization, or locally with different minimizations applied to subdomains of the surface. 21 09 2004 04 02 2005 deformation machining shapes (structures) tuning product design CAD interpolation minimisation...

... that is otherwise hard to learn quickly. The aim of grinding is to remove asperities on the surface of the work piece. The force modeling and mechanics of hand grinding process is different from the forces computed during conventional machining process due to two reasons; (1) compliance factors resulting from...

... of minimum clamping force required in machining operations. The system is integrated with commercial CAD package and applied in industrial real-cases. CAD tolerance analysis machining CAD/CAM engineering graphics Computer technologies have revolutionized the way products are manufactured. From...

... a methodology for generating a parametric representation of the machining process plan for a part family through merging product data sets generated independently from members of the family. We assume that these data sets are feature-based machining process plans with relationships such as precedences between...

...Fre´de´ric Vignat; Franc¸ois Villeneuve The following paper aims to apply the concept of the small displacements torsor (SDT) in order to predict the defects of a part resulting in successive machining set-up. The proposition is to enlarge the 1D dispersion method to a 3D analysis...

... of the part geometry. Second, if the desired gross mold shape is not machinable as a single component, then the gross mold shape is decomposed into simpler geometric components to make sure that each component is machinable using 3-axis CNC machining. The decomposition is performed to ensure that each...

... in turn requires a method for shape similarity measurement. In this paper, such a method is presented. First, the part is decomposed into simpler shapes resembling machining features. The decomposition method makes use of primitives to generate the shapes directly unlike previous methods in which...

... IN ENGINEERING . Manuscript received Feb. 2001; revised June 2001. Associate Editor: S. Szykman. 01 Feb 2001 01 June 2001 machining manufacturing processes tolerance analysis design engineering optimisation Interchangeability in mechanical assemblies and satisfactory functional...

... system, with a seamless communication flow from a client-side designer to a server-side machining service. The creation of CyberCut required several new software modules. These include: a) a Web-based design tool in which Design-for-Manufacturing information and machining rules constrain the designer...