Applied Mechanics and Materials Vols. 37-38

Abstract: A new design of anti-collision device is present in this paper. When the collision occurs, with the deformation movement, the anti-collision device can transfer the collision energy to the non-contact area, store the energy and release after collision, which can not only protect the protected object, but also reduce the damage to the collision-causing object, ensuring the anti-collision device itself can be reusable. As a result, this design of anti-collision device can greatly reduce damages and economic losses caused by the accidental collision.

Abstract: Color does not only embody the national culture, but also is an important factor on product design. Based on the purpose of increasing the factors of national culture on product design, this paper, both analyzes the benefits to introduce the Chinese tradition color cultural on product design, and how to extract its elements to product's color design. Through teaching and social practice, we have a new attempt on the practical application of the Chinese traditional color culture. By the analysis and experiments, showing that the introduction of the Chinese traditional color culture to product design is feasible.

Abstract: The Numerical Control (NC) machine has not yet improved its Human Machine Interface (HMI) quality, which has deep influence on the operating efficiency. Besides, the operation panel design is the lack of appropriate standards and evaluation systems. Therefore, this paper establishes an evaluation model of the visual elements of the NC machine operation panel, and it could propose a reasonable and reliable basis of operation panel design after analyzing the existing panels’ interface according to Radial Basis Function Network (RBFN) theory.

Abstract: Photographic developing machine has been widely used in printing business nowadays. In this paper, a developing expert system (DES) was built. The production knowledge representation, data-directed search control and context avoiding mechanism were designed in DES. DES can give appropriate developing time and temperature according to developer formulation, the type of negative and developing quality needed. On the basis of actual temperature, the developing time can be modified by DES on line in order to ensure the production quality. Experimental results show that the developing machine controlled by DES can develop negatives automatically with appropriate time and temperature.

Abstract: This paper proposes an improved adaptive NURBS curve interpolation scheme, which keeps a constant feedrate most of the time and adaptively changes feedrate with consideration of machine dynamics. It reserves the advantages of adaptive planning, which has a shorter machining time and a better machining performance, and removes abrupt feedrate changes at the beginning and end of sensitive corner. Furthermore, this method reuses the previous interpolation values during look-ahead planning rather than discard them.

Abstract: The paper presents Production-in-product lifecycle management as a new approach to integrate functions and its operation and optimization towards its rebuilding or deconstruction and the restart of the arising cycle. Essential elements of Production-in-product lifecycle management are the suitable consideration of models used by digital tools for the presentation, analysis design iptimisatiom and control of production systems as well as the linkage of these models to the ‘real world’. Production-in-product lifecycle management to forms and essential element of a Digital Manufacturing approach that enhances competitiveness of industrial enterprises by the reduction of times and costs for product creation and order fulfillment. Thereby Digital Manufacturing may serve as one building block for a comprehensive Digital Enterprise.

Abstract: In the facility layout decisions, the previous general design principle is to minimize material handling costs, and the objective of these old models only considers the costs of loaded trip, without regard to empty vehicle trip costs, which do not meet the actual demand. In this paper, the unequal-sized unidirectional loop layout problem is analyzed, and the model of facility layout is improved. The objective of the new model is to minimize the total loaded and empty vehicle trip costs. To solve this model, a heuristic algorithm based on partheno-genetic algorithms is designed. Finally, an unequal-sized unidirectional loop layout problem including 12 devices is simulated. Comparison shows that the result obtained using the proposed model is 20.4% better than that obtained using the original model.

Abstract: A solid model of rotary mechanism for boom type roadheader was built by means of UG software. The solid model was introduced into the ADAMS through the interface of the UG solid model and the ADAMS and a simulation model of machinery-hydraulic coupling system of boom type roadheader was established. Dynamics simulation was carried out. Force curves of the rotary cylinder and the lift cylinder to the rotary table joints under different positions were obtained. The relationship between the axial force and radial force in the same period was analyzed. Research results could improve the stability of boom type roadheader working process and provide a strong theoretical basis for the further optimal design of the rotary mechanism.

Abstract: Analysis of dynamic characteristics is one of the important parts of structure analysis for space deployable antenna. In order to study the dynamic characteristics of truss structure for space deployable truss antenna, according to the structure composition, the finite element model of truss structure is built by using ANSYS software, and the modal analysis is carried out by finite element method, then the natural frequencies and the features of vibration modes are obtained. It is emphatically analyzed that the influence of structure parameters such as chords, vertical beams, diagonal beams and crossing cables on the first natural frequency, and the change curves of natural frequency are given. The results can provide the theoretical basis for the antenna’s structural optimization design and dynamic modification.

Abstract: The dissipated heat in grinding is utilized to induce martensitic phase transformation and strengthen the unhardened steel in grinding, which can be integrated into existing production lines. The orthogonal experiments were performed to analyze the main impacting factors and the rule between the parameters and hardness layer results. The surface hardness depth is varied with different surface zone. Cutting depth is the main factor of impacting the surface hardness and hardness layer depth. Hardness layer depth is higher with the cutting depth deeper and smaller with Table speed faster, but the surface hardness is higher with the Table speed faster.