Applied Mechanics and Materials Vols. 556-562

Abstract: The energy that traditional diesel particulate filter (DPF) regeneration with microwave requires in regeneration process often exceeds the capacity of the vehicle's battery, a rotary partition regenerative DPF with microwave is proposed recently, which was a annular column consisting of the fan-shaped filter units. A filtration unit microwave heating regeneration model was established aiming at this DPF, to study the regenerative properties of the filtration unit and to get influence that its shape structure plays on reproduction characteristics. The results show that: the central angle, length to diameter ratio, the ratio of inner and outer diameter of the DPF all have larger impact on the regeneration. The results can provide theoretical basis and reference for practical development of the new DPF.

Abstract: It is becoming a development direction to study green forming process in mechanical. The processing technology of machining deep hole in relative thin sheet is a kind of green mechanical processing technology in this paper. The process uses the friction between driller and workpiece and plasticity of workpiece to form hole. The new technological process not only saves material, but also saves man-hours, and the workpiece has a good piece of assembly. In this paper, the forming process of deep hole on thin sheet was simulated, and some effect factors of forming hole were studied, such as the stress, temperature and shape of forming area, etc. The forming simulation is proved to be feasible by the test in this paper. The study results are useful to improve the machining parameters, and laid a foundation for further research on forming deep holes process on thin sheet metal by friction heat.

Abstract: Aiming to reduce the volume of helical gear and the heat generated by the friction of meshing place, the multi-objective optimization design model of helical cylindrical gear transmission is established. The calculator is integrated in ISIGHT integration platform, then to solve the mathematical model. The optimization result shows that the volume of helical gear and the friction power loss of meshing place are reduced, the purpose is achieved which will reduce the production costs and prolong its working life.

Abstract: The processing technology of turbocharger impeller shaft involves shaft processing and Impeller processing two aspects of content. The design of casting impeller’s processing technology is based on reducing metal removal of the impeller dynamic balance. Casting impeller is an efficient method for the production of impellers, the dynamic balance of precision casting impeller itself can be used to achieve the use requirement of the impeller. It can meet the requirement of dynamic balance as the impeller rotation when the axis of impeller’s symmetry axis as locating datum in the process of machining. It means reduced the metal removal of dynamic balance. We Put the impeller axis symmetry as the processing benchmark, and then design a processing method of shaft and impeller. It can ensure concentricity of the two shafts when implement the processing technology of shaft and impeller after welding. At the same time achieve the requirements of the minimum Metal removal of Impeller shaft dynamic balance.

Abstract: Full-automatic hydraulic press is widely used in ceramic industry for pressing the adobe of all kinds of specific ceramic tiles, so it is also referred to as ceramic press. The upper beam is one of the most critical stressed members of the ceramic press. The paper took 21MN ceramic press as the research object, completed the finite element static analysis of its upper beam. First established the three-dimensional model of the beam by CAD software Pro/ENGINEER, and then imported the model into CAE software ANSYS and analyzed the stress and strain distribution in detail. The results can provide some useful reference for ceramic press design and optimization.

Abstract: this paper introduced the existing ladder-shaped micro hole machining method, analyzed the existing problems of present micro hole machining equipment; solved some key problems such as how to clean up the iron filings in micro blind holes rapidly and completely, compensate tool wear and other problems; And finally developed a special purpose machine tool for machining ladder-shaped micro hole, which can achieve fully automated machining.

Abstract: The purpose of this investigation was to explore the influence of the biomimetic surface morphology on the modal properties of gear. Firstly, a involute cylinder gear model had been created, and the biomimetic surface morphology had been established on the gear tooth flanks. Secondly, the modal analysis of the ordinary gear and biomimetic gear has been investigated separately through FEM method. Results showed that the maximum amplitudes and the ten natural frequencies of biomimetic gear were obviously lower than that of the ordinary gear, but the modal shape of the two kinds of gears were almost the same. The biomimetic surface morphology could improve the dynamic characteristics and reliability of gear in the future.

Abstract: In this paper, an experimental research on the influence of the biomimetic surface morphology on the bending fatigue resistance of gear is carried out. The biomimetic surface morphology was prepared on the gear surface by a 4.5-kW Nd:YAG pulsed laser. The results showed that the fatigue lives of all of the biomimetic gears were much longer than that of the as-received gear. The bending fatigue resistance was improved by the biomimetic surface morphology. The bending fatigue resistant mechanism of biomimetic gear is discussed.

Abstract: The paper took 2080 tons automatic hydraulic tile press as the research object, completed the finite element static analysis of its beam and base. Established their three-dimensional models with CAD software Pro/ENGINEER, and then analyzed the stress and transfiguration with CAE software ANSYS. Studied the distribution of the stress and strain, and found their maximum and location. The result can provide some good reference for design and optimization.

Abstract: This paper aims at presenting a theoretical basis as well as a simulation data for both strength check of grab crane and amendment of dynamic load. It introduces the methods and results of conducting a finite element analysis on the metal construction of grab crane which was accomplished by using ANSYS Workbench. Firstly, a simplified model of the grab crane’s metal construction was established. In accordance to the different working conditions of the grab crane, static analysis, modal analysis and transient analysis were performed. The results of simulation showed that the main beam’s maximum deformation was 1.8mm and the maximum equivalent stress was 78.367MPa, the design of grab crane’s metal construction was feasible.