Advanced Materials Research Vols. 328-330

Abstract: First, the topology of free-form surface of an electronic vacuum product was analyzed and studied. Then, the parametrical modeling about such complex free-form surface was realized by using UG/KF customization. So, the repeatability of modeling about such complex free-form surface with same or similar topology was reduced, and the modeling time was saved, and the design efficiency and quality were improved too.

Abstract: Using the existing GSM network for location is currently a hot, but usually the system only can complete the location function, and could not communication with others. For the purpose of the voice communication between the mobile terminals in forklifts and the service center, this paper designed a new emergency call system to overcome the above disadvantages, and especially taken their applications into consideration.

Abstract: A new type of pastry slicer which could alter pastry thickness expediently was designed by using SolidWorks and ADAMS. In the first place, the pastry slicer 3D model was established by SolidWorks and imported into ADAMS by the nicer interface between SolidWorks and ADAMS. In the second place, the pastry slicer 3D model was simulated in ADAMS. The dynamics simulation result showed that the pastry slicer could fulfil the anticipative design requirements. The simulation analysis results could be regard as the design reference for the new type of pastry slicer, and the virtual prototype could be used to do a deeper analysis according to different requirements.

Abstract: As maximum flow could be used as a significant indicator of congestion in air traffic network, the flow model was then proposed in the study. When air traffic was influenced by emergencies, this model, adopting the discrete time loss queuing, could obtain the transition probability matrix by building conflicting factors. Then, with the loss probability of network, the theoretical maximum flow was calculated.

Abstract: The processes and methods of reverse engineering are presented in detail through a practical case in this paper. Point cloud acquisition, data processing and model reconstruction are the key techniques in reverse engineering. The sample’s point cloud acquired by laser scanner is processed in Geomagic, and the boundary and characteristic line are extracted simultaneity. Finally, the surfaces are constructed and modified, and the CAD model is reconstructed in NX. The research indicates that the reconstruction data by reverse engineering is an effective technique, which can bring about high quality model and improve efficiency.

Abstract: In the past, the instrument in the test station is usually using analogy technology, the testing and inspecting with the device executed with discrete and isolated way, in order to improve the efficiency and effectiveness, the digital instrument of radial direction preciseness for round shape part is designed and composed based on Labview in this research. The mechanic section of this instrument is an inspection device, the acquisition section use the acquisition module of NI, the software of the instrument is developed with Labview. The instrument is fitted to apply in the shop floor of factory.

Abstract: An electromagnetic pick-up grip device is designed in the paper. The device is used to realize mutual attraction of the spot galvanized solenoid with iron core by using principle of electromagnetic induction. Thus, it can realize effective contact between sensor and testing specimen. It belongs to nondestructive testing support equipment. The device has the following characteristics of high accuracy, easy operation and continuous test of multi-sensors and multi-specimens because it adopts electromagnetic pick-up, step-motor controlling and recoil of spring device.

Abstract: The introduction of the thought of supply chain management into the construction industry can improve the competitiveness of enterprises. Based on the integration of both the effect of the supply chain as well as supply chain management and the actual situation, this paper analyzed the necessity of the construction and implementation of supply chain management of the construction enterprise. Compared with the supply chain of manufacturing industry, we found it feasible to implement supply chain management in the construction industry and analyzed the obstacles in it. Finally, it pointed out that the clustering of construction materials, information technology, business process reengineering, outsourcing of projects logistics and so on were the basis of constructing supply chain management of the construction enterprise, and accordingly the joint-design supply chain model of the project cost-oriented and the responsiveness-oriented was established.

Abstract: In order to implement continuous roll of steel plates, steel plates need to be jointed simply and reliably. CQ steel plates have advantages such as low impurity, composition uniformity, excellent surface quality and good mechanical properties. However, there always has fracture failure of the online welded joint for continuous cool-roll CQ plates. For solving this question, theoretical calculation of weldability, fracture morphology and metallurgical structure were analyzed. The results show that CQ steel plates have good weldability according to the chemical composition, and the microstructure of welding seam are mainly ferrite and a small amount of lath martensite.While grain growth in HAZ is serious, with average grain size 15μm. A lot of impurities and gas cavities in welding seam are the main source of cracks. In addition, stress concentration caused by coarse grain zone in HAZ is one of the reasons for causing cracks. The microhardness was test and the results show that the hardness decrease from weld center to the base metal and there is a minimal value where is softened zone.

Abstract: Cooling stage is a key stage of injection molding. It affects both the quality and efficiency of injection molding of products. Conformal cooling channel, due to its advantages in uniform cooling and rapid cooling, could improve the cooling effect obviously. Therefore, study on methods of machining curved hole are proposed to be used for practice. In this thesis, some methods of machining curved hole and their features in general were introduced.