Abstract: According to the characteristics of the multi-variety and small batch production units, the traditional man-machine operating analysis methods can not meet the needs of the optimized manufacturing process. In order to maximize the utilization of man-machine resource, a man-machine combination and mixed flow processing method is proposed in this paper. It involved several integrated application methods. The man-machine operating analysis method can optimized the process of the man-machine operating, and also can acquired the important parameters of the man-machine operating in each species production processing, The integration of gather form, histogram and single people-multi-machine calculation formula made the various products processing parameters analysis and the remaining energy utilization easily. By using this method, the optimized plan of the man-machine combined in various products processing can be determined. The characteristics of the proposed method are that it extends the design program of man-machine combination and mixed flow processing. The test results show that the new method works well in the multi-variety and small batch production model.
Abstract: Based on the in-depth study of traditional weft insertion apparatus, the electromagnetic technology was introduced into the textile machines. A new textile machine was researched whose shuttle was moved by the electromagnetic force. The electromagnetic force was generated by electromagnetic coil. The electromagnetic shuttle was moved fast in the shuttle path by the electromagnetic force. Through this technique, the weft insertion movement was accomplished and a defect was remedied that aroused by the traditional weft insertion apparatus. The weaving question which is width of cloth was solved by the new technique. At the same time, the structure of electromagnetic weft shuttle and the working which is the single shuttle and two weft was designed. The speed impact factors of electromagnetic shuttle was study in the angle of mechanics. The control method is the acceleration in the first half and the deceleration in the second half.
Abstract: The cooling process of injection molding is a complicated process related to thermodynamics and hydrodynamics, and it has a direct impact on quality and productivity of injection molded parts. With increasing requirements on high quality of injection molded parts, the research on the design of conformal cooling channels of injection mould gradually becomes a popular subject. The paper introduced the process of heat transfer for plastic injection mold with conformal cooling channels and its feature; analysed the optimization of conformal cooling channels; A new set of design methodology and rules is developed.
Abstract: Aluminum alloys are the subject of increasing interest in the automotive, as well as aircraft industries. Concerning the assembly, welding was extensively applied in the car industry. Nevertheless, welding defects generated during the process result in reduction in strength of both the weld; and heat affected zone which could limit its applications. Electron beam welding (EBW) has unique advantages over other traditional fusion welding methods due to its high-energy density, deep penetration, large depth-to-width ratio and the resulting very small heat affected zone. Optimization of EB welded joint of 2219 Al-alloy, from the yield strength, hardness and bead geometry point of view, is the topic of this study. Taguchi methodology with grey relation analysis has been applied to find the optimal welding parameters for welding of a sheet of the mentioned aluminum alloy with electron beam. The optimal welding parameters have been selected and verified experimentally.
Abstract: In order to improve the work performance of the GMS-7 spine taping machine,reduce the labour intensity of the operators and the spine taping cost,through giving an analysis of the spine taping papers’ water feed process of the GMS-7 spine taping machine,we understanded the spine taping papers’ water feed principle,which provided the theoretical guidance to use glue pot device instead the special Pre-applied water sol paper to reduce the spine taping cost.
Abstract: The drying section of paper machine is not only the major energy-consuming parts of the papermaking process, but also one of the main bottleneck restricting the speed, yield and paper quality. So the research on the drying section has attracted much attention at home and abroad. In view of the traditional steam dryer shortcomings, this paper first introduces two kinds of improvement measures —— the tubulator bar and the siphon which can improve the efficiency of the traditional steam dryer. With the development of the paper industry, domestic and international research on the new type of paper drying technology has achieved some success. Then, we analyse their working principle and characteristic, and conclude that multi-channel dryer has a broad research and application prospects.
Abstract: Particle reinforced aluminium matrix composites could be used in manufacturing of aviation thin-walled workpiece due to its excellent performances, but it is hard to be manufactured. Rotary ultrasonic machining (RUM) is very suitable for machining particle reinforced aluminum matrix composites with moderate or high volume fraction. Chatter appears very easily in machining process of thin-walled workpiece and it can seriously reduce the quality of components. Based on the dynamic characteristics of machining process, a stability analytical model is built. It is analyzed that the process stability of a thin-walled workpiece of SiCp/Al composites reinforced with 45% volume fraction, and the stability lobe diagram is plotted by using MATLAB. According to stability analysis results, a machining experiment is conducted and the test results indicate chatter could be prevented effectively by this method.
Abstract: Fibre-reinforced polymer (FRP) composites have been widely used in industry. However, the machining of FRP products is difficult, because of very different properties of the fibres and matrix. This paper discusses the development and implementation of a microstructure-based three-dimensional finite element model for the elliptic vibration-assisted (EVA) cutting of unidirectional FRP composites. The results showed that the EVA cutting has a good potential to the machining of FRP composites, featured a much reduced cutting force, better surface integrity and controllable chip size.
Abstract: There is not only the flow of the single-phase fluid but also the mixed-flow of the gas-liquid fluid in the system. So, it is very necessary to study its operational characteristics. In this study, the low pressure heaters (LP heaters) in the feedwater system are simulated. Firstly, the models are built using the simulation software JTopmeret and debugged on the simulation platform SimExec. The results are then compared with the design parameters. Finally, the comparison results are analyzed. The simulation results show that the operation parameters of the simulation models are consistent with the design parameters of the system, which proves that the simulation models of the LP heaters are correct. Thus, the simulation is able to provide guidance for the operation analysis, the equipment optimization and the system debugging of the feedwater system.
Abstract: In this paper, according to the characteristics of caterpillar vehicles, taking the PC200 excavator as a model, a caterpillar chassis model is established using analytical finite element method by the software Analysis. According to the characteristics of operating status, the load distribution of supporting wheels, at horizontal support, across the slopes at 10°, in the state of climbing 30° slopes, is analyzed. Effective support area of any three wheels is analyzed to obtain. The condition of focus circle and vehicle stability is determined. The maximum load of static stability is obtained according to the method of stability of three wheels. The results of calculation provide load support for the strength analysis of caterpillar chassis components and stability analysis, It also provides the supporting data for the structural optimization.