Key Engineering Materials Vols. 392-394

Abstract: Introduced systematically the forming principles and mathematical modeling of grinding/ milling spiral flutes with numeric control machines, overviewed the functions of multi-axis linkage and the determination technique of the number of the linkage axes, discussed the conversion technique of NC—STEP-NC code in programming with EXPRESS, presented advances of controlling systems with high performance. Much attention was paid to the explanation of the error modeling and the tool interference in the real machining with the error-compensation techniques. Trends were envisioned on key technique study of the forming principles for the spatial spiral flutes, function of multi-axes, tool interference in the real machining and simulation of the operation processing, as well as automatic generation of NC codes and the connection /compatibility of the codes with the mainline NC systems, in future.

Abstract: A new type of torque sensor system used in torque rheometer is designed. Precision and reliability is analyzed by virtual prototyping simulation. Simulation shows that the system error increases with the backlash increasing. So the gearhead must have some certain precision demand. The torque sensor components are developed on the basis of simulation. The experiment shows that this measure system does not use active part, so it does not need to maintenance, and the reliability is high. The temperature and outside stress influence and hysteresis error are eliminated. The torque sensor system measure precision is better than 0.1% F.S.

Abstract: A real time hand tracking and gesture recognition approach which can deal with dynamic backgrounds is presented. This approach is based on computer vision. It segments hand from dynamic backgrounds using the color-based and appearance-based methods. Then, it locates the hand according to marker on the hand. Last, it recognizes the gesture based on geometry constraint of hand. In comparison with the traditional approaches, it provides a good real time performance, is easy to realize, does not require a stationary camera and is not sensitive with intensity different because its gesture recognition does not depend on the templates. Moreover, an augmented assembly system using the presented approach is described. The experiment result of the augmented assembly system demonstrated the effectiveness and robustness of our approach.

Abstract: In this paper, the theory of the powder temperature measurement using radiation is briefly illustrated, and the measurement system on temperature field in coaxial powder stream of laser cladding by applying color CCD and digital image processing technology is designed. The experimental result indicates that this measurement system can test the distribution of temperature field.

Abstract: Due to the high strength of austenitic stainless steels, it is essential for cutting tool to keep with appropriate chamfered edges during the face milling process. In this paper, face milling mechanics with chamfered edge based on cutting force and chip formation were analyzed through finite element analysis (FEA). Three kinds of tools with different chamfered edges were studied on face milling of 1Cr18Ni9Ti austenitic stainless steel. The primary research results indicated that FEA results showed good consistency with experimental results. This can provide references for development and application of tools during face milling process.

Abstract: The factors of outline appearance, colors and interior decorations in vehicle design have direct influence on consumers. How to express these factors rapidly and vividly by using virtual reality (VR) technology has been researched in the paper. Firstly, the design scheme has been presented out of virtual driving platform. Secondly, the vehicle models and its exterior scenes have been built. In addition, the virtual driving platform has been established based on EON Studio, the Cg advanced rendering and the collision detection are developed of vehicle body and exterior scenes. Finally, the human-machine interactive operations have been realized, which provides virtual environment for designers and customers to observe and experience freely in the virtual driving platform.