Advanced Materials Research Vols. 1049-1050

Abstract: In clothing customization manufacture, cutting schemes are worked out mostly based on manual experience. This not only wastes extra time and workforce, but also induces mistakes, especially for various orders in business wear customization industry. The cutting plan optimization system designed by our paper realizes the function of the automatic and interactive production of cutting plan. The system’s application reduces the cost and the sub-bed error, improves the efficiency and optimizes the management.

Abstract: Steering system directly determines the tractor steering characteristics. It has great influence on the driving comfort of a tractor and the life of the tire, etc. Based on the platform of the virtual prototype software ADAMS, the virtual prototype model of tractor steering system and the motion simulation were established. The parameters such as the tractor steering angle displacement were measured and the steering performance of tractor was analyzed. The model and simulation method this article used has significant references on the performance analysis of other vehicle steering system.

Abstract: The design and quality of steering mechanism is directly related to forklift traction, mobility, steering stability and safe operation. A multi-objective optimization model of the forklift steering mechanism is established in this paper. The objective function is minimum oil cylinder stroke difference and the minimum power oil pump. Steering torque, geometrical angles, geometry size and the hydraulic system pressure are used as constraint conditions. We use non dominated sorting genetic algorithm (NSGA II) based on the Pareto optimal concept to optimize and calculate model and get the optimal design of steering mechanism.

Abstract: This paper analyzes the defects of a scraper stem humidifying machine, reforms the equipment structural and solves the problem of leaking steam and water, which effectively improved the reliability and increased the temperature and humidity of tobacco stem at the discharge end. It has a good reference value for analyzing and improving tobacco humidifying equipments.

Abstract: Adhesive bonding is one of the effective ways to reduce the weight of structures. Researchers have done lots of numerical analysis and finite element analysis taking into account of the complex stress state in the bonded area, as well as the stress singularity occurs at the overlap edges with a view to efficiently predict the strength and rigidity of adhesively bonded joints. As they may suffer shock or impact loads in practice which leads to high strain rate in structures, analysis methods for adhesively bonded joints differ from that at quasi-static condition for two reasons: one is the mechanical properties of materials, including adhesives and substrates are different at high strain rates, the other is the additional consideration of elastic wave propagation in solid body. This article summaries several finite element analysis methods for adhesively bonded joints at high strain rate developed by domestic and foreign scholars and corresponding experimental standards for determining required parameters of each analytical method and raised some questions that need for further study.

Abstract: The paper simulate electro-hydraulic valve hydraulic system through the study on hydraulic simulation research, research the response of accuracy and stability, using AMESim software build electro-hydraulic valve model, simulate the actual working conditions of the electro-hydraulic valve and column hydraulic system simulation, verify the correctness of dynamic simulation results. Reference simulation results,we present programs to improve electro-hydraulic valve to improve its stability. AMESim software has good dynamic simulation performance and simulation accuracy, which provides a new research idea for overall dynamic performances accurate analysis of the filling hydraulic support system.

Abstract: Tension and elongation of warp is the key factors among various technical parameters in warp sizing process in textile production. Analysis of composition of tension & elongation in different zone on sizing machine.By means of mechanical device and electric sensor, as well as frequency conversion speed regulator controlled by PLC, the sizing warp tension &elongation has been regulated precisely. The principles and features of various sensors and their application on modern sizing machine regarding automation have been discussed in this paper.

Abstract: Concerning the intelligent control of technique parameters in weaving preparation process known as automatic winder in textile production, the yarn tension, yarn defects, running speed and acceleration are key technique parameters which should be carefully monitored and controlled. The linear and rotating speed will definitely affect the dynamic tension of warp yarn during the winding process. The acceleration of the tension device on automatic winder and tension roller will affect the swing speed and amplitude, eventually influence the value and abirritation of dynamic tension. The capacitive transducer is used to detect yarn defects for improvement of yarn quality, in addition such sensor is qualified to monitor the acceleration of dynamic tension regulator. The principle and designation as well as application of relevant sensor has been discussed in this paper in detail.

Abstract: In order to automatically set the shape target curve, a model based on shape control theory is put forward. By coupling the shape forecast model and the shape discrimination model, the practical and strict shape target curve is researched. By combining strip plastic deformation model and rolls elastic deformation model, the shape forecast model is built. The shape discrimination is based on the strip element method. The main idea of the shape target curve is to minimize the shape crown in the first few passes on the condition that the strip is not unstable, in the last two passes to keep the good shape under the natural shape crown. Taking five-pass six-high rolling mill as an example, the convex strip is analyzed. The simulation and calculation results prove the validity and feasible of the shape target curve setting model. This model develops the shape target theory and lays the foundation of application of shape target curve in the rolling process of cold rolling.

Abstract: In the process of production and processing of Dynamically Tuned Gyro, this paper analyzes the situation that the current accelerated stability test cannot be able to eliminate the residual stress fully which will causes drifting parameter varying of DTG based on FMMEA. The result shows that the residual stress is the important factor of DTG poor reliability. Here the new accelerated stability test profile was designed and verified in the test which eliminated the residual stress effectively. The research method and results has theoretical significance and practical value in making DTG reliability growth.