Advanced Materials Research Vol. 940

Abstract: The effect of the face and side panels of honeycomb cores on their equivalent in-plane elastic properties is studied by the numerical simulation in this paper. The numerical results show that the deformation pattern of the honeycomb core constrained by either face panels or side panels is totally different from that of pure honeycomb materials. As a result, both the face panels and the side panels of honeycomb cores significantly increase the equivalent in-plane moduli of honeycombs. The commonly used prediction model of honeycombs cannot be used for the evaluation of the additional in-plane tensile stiffness contributed from the honeycomb core. However, the prediction model for the equivalent in-plane moduli of honeycombs with the periodic displacement condition yields much better results.

Abstract: In rapid designing system of tower crane, the parametric design of jib is one of the key points in the process. The whole process of parametric design for the jib is introduced in this paper, which includes parameterization of a single part, parameterization of entire jib, jib design with the characteristic of changing arms for tower crane and design method of automatic assembly for the jib, etc. Realization of the jib parametric design lays foundation for the rapid design system of tower crane.

Abstract: During type test experiment of loading mechanism, there exist a problem of deformation and cracking, in order to solve this problem, movement of cylinder under the action of gas source is analyzed by numerical simulation, based on this, use finite element analysis to execute dynamics simulation analysis, the effect of high-speed collisions when loading mechanism work it bring to cylinder bracket is analyzed, and the reason of cylinder bracket crack is find out. The modify method is put forward, it is proved by experiment that, after modify, the working reliability is significantly improved.

Abstract: In the examination of gun’s multi-cartridge clip rapid gunnery, there exists a problem of unreliable percussion. In order to solve it, the reason for this regularity and foreseeable fault was find out, which is after the analysis of automaton’s stricture and principle it work on. Based on this, the effecting of temperature was analyzed and calculated due simulation way. After that, the modified methods were push out. And it proved that the problem has been solved due the experiment which is mean to test the feasibility of this modified way. Also, the method to overcome this problem can be referred to in design, manufacture and use in the future.

Abstract: This article is aimed at a kind of rotary type desk that can move, so we designed a scissor–type lifting mechanism and use MATLAB to optimize it’s rod length so as to prove the rationality of mechanism design.

Abstract: Lengthened shrink-fit holder is one important part of high speeding tool system. Its gripping rigidity directly affects the quality of the processed parts and machining efficiency. Building the FEA model of axial gripping rigidity about Lengthened shrink-fit holder and Cutting tool system with UG NX to analyze the influence with different interference,speed,gripping length and thickness on axial gripping rigidity. The gripping rigidity is one important parameter of the lengthened shrink-fit holder and cutting tool system, including radial griping rigidity,torsional griping rigidity and axial gripping rigidity,the reasonable interference of shrink-fit holder is obtained by contrasting three rigidity. Research provides a certain of theoretical guidance on the design of the lengthened shrink-fit holder and cutting tool system and choosing the reasonable processing parameters.

Abstract: This paper introduces the fire rescue the robot's stability of the mechanical design and theory research. Through the Solidworks 3d software simulation model is established, and summarizes the analysis of its mechanical structure reliability and the stability of the overall performance, help to promote the equipment used in our country in the process of fire rescue..

Abstract: This paper designs a new type of building glass curtain wall cleaning machine safely and effectively, which can replace artificial cleaning operations, This washing machine is mainly composed of crawling mechanism and cleaning mechanism designed through the modular design method.First of all, under the premise of correct and reasonable function decomposition,this article discuss about the overall movement scheme and control part design in sequence. Secondly,based on the 3 d design software Solidworks,the author built the virtual prototype model of building glass curtain wall washing machine in order to motion analysis and then ensure the rationality of the design.Finally,in view of the existing design, further improvements and optimization suggestions are presented , at the same time, the developing foreground of this machine was prospected.

Abstract: In this paper, a flexure hinge micro-displacement magnifying mechanism was designed, which was based on the principles of triangle amplification, and the amplifier was driven by piezoelectric stack. The displacement of piezoelectric stack was amplified by the flexure hinges micro-displacement magnifying mechanism. In order to test the static and dynamic carried on it. Not only the characteristics of good linearity, magnification, high positioning resolution and high frequency response achieved but also the design theory approved its correctness in the experiment.

Abstract: The modeling of surface roughness is the key factor to improve the quality of products and raise the efficiency of process equipment in ultra-precision turning process. In order to analyze the influence of each cutting parameters on surface roughness, the prediction model of surface roughness was constructed, and parameter identification of the prediction model was required. To meet the requirement, the curve fitting tool of MATLAB toolbox and radial basis function neural network optimized by genetic algorithm were respectively used as a case study to validate the feasibility and reliability of the method proposed in this paper. The parameter identification results were given, and the comparison of the parameter identification results shows that the parameter identification based on radial basis function neural network optimized by genetic algorithm has higher prediction accuracy than curve fitting tool of MATLAB toolbox.