Applied Mechanics and Materials Vols. 494-495

Abstract: In order to study the principle of wave power generation, a multi section floating mechanical wave energy power generation device and a rectifier voltage regulator circuit are designed. The device consists of multi cylinder buoys, direction changing and speed-up mechanism, generator, rectifier voltage regulator circuit and other components. According to the certain regulation of wave movement, the structure and parameters of the wave energy capture device are designed; based on the movement characteristics of wave energy capture device, the direction changing and speed-up mechanism is designed, including crank-rocker mechanism and gear mechanism. The rectifier voltage regulator circuit is designed by the law of generator output. The experiment research shows that the efficiency of wave energy power generation device is up to 45.8% under the condition of prescribed test wave.

Abstract: Based on MSC.ADAMS, the virtual prototype of two design schemes is built in the timing belt of LED placement machine, and simulation analysis of two design schemes of timing belt module is made. Simulation results show that, the timing belt model in the motor-middle-driven design is better than the motor-side-driven model in the synchronization performance. Based on the method, the performance of timing belt can be obtained before the prototype manufacturing, and the result can guide the timing belt design in LED placement machine.

Abstract: To improve the efficiency of cylindrical plunge grinding, an optimization of grinding process is developed using the Acoustic emission (AE) signals. The relationship between the grinding feed and grinding depth is established based on the elastic deflection between wheel and workpiece. Acoustic emission (AE) signals are curve fitted through the gauss - Newton method to find the stable point of various grinding processes. Therefore, grinding time of each grinding stage is reduced to improve the grinding efficiency.

Abstract: The mechanical model of a new spring locking mechanism was established. The optimum spring parameters of the locking mechanism which meet the design requirements were provided by optimization. Using the finite element method, numerical simulation of working process of the locking mechanism was carried out. The rationality of optimization result was verified by simulation results of numerical simulation.

Abstract: A coupled model of piston secondary motion and mixed hydrodynamic lubricated was established based on flexible multi-Body dynamics. The model included elastic deformation and roughness of the two surfaces. The effects of rough surface compared to absolutely smooth surface on piston secondary motion mixed lubrication are discussed. The results show that roughness of the surface can make the fluid a better way to lubricate the surface and decrease the secondary motion, but in the high load asperity contact will occur.

Abstract: The mechanical transmission of the traditional packaging machine is complex and slow. Single packing species, long development cycle, which cant adapt the growing of diversification and personalized needs of packing. In this paper, three servo pillow packing machine, for example explores the high-speed synchronous transmission process of packaging systems. Studying the servo pillow packing machine in this article is a kind of packing equipment, which can automatically complete feeding, deliver the membrane, makes the bag, pulls the membrane hauling, vertical seals, seals the transverse cutting horizontally, end product output and other processes, adapting for the general block packaging material, tube shape regular goods, irregular shaped goods, for example: biscuits cakes, cosmetics, paper towels and so on. Packing speed is fast and the movement precision is high.

Abstract: Electro-hydraulic servo valve is the key component in electro-hydraulic servo control system, it has high reliable assemblies over a long period of time. This paper utilizes the accelerated degradation testing to evaluate their reliability and life. Firstly, the wear failure mechanism of electro-hydraulic servo valve is analyzed to determine. Then, by modeling the degradation process as a drift Brown Motion, this paper generated the reliability model of the electro-hydraulic servo valve. Finally, the maximum likelihood is used to estimate the degradation data of leakage from the test. The methodology in this paper is demonstrated and validated by reasonability of estimation of electro-hydraulic servo valve.

Abstract: With the continuous development of LED industry, speed and accuracy requirements of LED packaging equipment is more and more high. To further improve the operation speed, it is very important to improve the stability of the positioning platform. Based on MSC.ADAMS(Automatic Dynamic Analysis of Mechanical Systems),the dynamics simulation model of the positioning platform in LED packaging equipment is established, and the effects of the assembly precision is researched on the machine performance. The method provides the theoretical basis and practical guidance for LED assembly process, and thereby can improve the operation speed and stability of the packaging equipment.

Abstract: A wide variety of lighting lamps and lanterns were used in various occasions in our daily life. Considering the service life, the lamps and lanterns were changeed usually. It is extremely complicated to replace the lamps and lanterns installed in high or concealed position. The installation and demolition device for lamps and lanterns based on optimization design method and dynamics analysis is introduced in the paper. The device can be used in the place of ordinary families, residential areas and fitted for different specifications of the lamps and lanterns. The work efficiency was improved greatly through the mechanisms arranged in circular. In the research, the virtual prototype technology was used to simulate the kinematics and dynamics characteristics of the mechanical system. The feasibility of the design scheme of mechanical system was proved with the simulation analysis results. The equipment has advantages of the structure is compact, safe and reliable, easy to use. The research of the installation and demolition device for lamps and lanterns can be regarded as the reference of the related research.

Abstract: Calculating the trimming line is an important step for the panel flanging. In this paper, we use the one step inverse finite element method to calculate the trimming line for auto panels flanging, the finite element model of flanging forming is established and completed the iterative solution of the equation, using the reverse deformation method to establish the linear elastic balance equation to solve the iterative initial value, and thus get the trimming line accurately and rapidly. Through the calculation of the trimming line of some flange part verified the effectiveness of the algorithm.