Abstract: With the rapid development of advanced industrial technology and computer technology, using the reverse engineering to mold and simulate for products has already been an important trend in the modern product design, and it has also been an important technology in the CAD/CAM field, especially the field of the molding design. The article took telephone handset as an example, the point cloud data of the physical profile was done by the three-dimensional laser scan using the reverse engineering technology. The handset 3-D mold was given in Pro/E by the point-data processing, the curve and surface constructing. Finally the handset injection mold was designed. The study result shows that using reverse engineering to achieve the design of injection mold can not only effectively reduce the cycle of mold design, but reduce design cost.
Abstract: A filtration system is designed for vacuum coating according to special requests. 3D model for system is established and analysed. Some parts of the system are introduced, such as important component, pipeline layout and analysis under external load. According to the principle of selection about important parts which contain vacuum pump and pressure tank, suitable parameters of parts can be confirmed. Modifying corresponding parameters can rebuild 3D model to realize FEA. Better parameters combination can be obtained by the means of contrast between the old and new model. That optimization of structure can make the medium of pipeline smoother and reduce complex pipe to realize cost savings as far as possible. Improving variables of filtration system can improve the efficiency of work.
Abstract: The air contain very low density of energy, as a result the complex 3D shape blade is required for maximize the energy extraction. The blades of the wind turbine will suffer the tough nature environment. The complex 3D shape blade with thick composite layers creates unique challenge for the design and structure analysis. The equivalent property of a composite layer that contains multiple plies of laminates is often used in the analysis of the thick composite structures. This study focused on a methodology to calculating the equivalent material properties on the 3D blade with thick composite layers. The research applies reverse engineering method to sample the blade material in order to get the equivalent material properties of complex composite 3D blade. By doing this, an equivalent material properties of composite blade can be used in the finite element analysis. The result can also provide a guide line for stress and fatigue design of blade.
Abstract: This paper aims to do blade design of a small horizontal axis wind turbine and perform wind tunnel test to conform its efficiency. In this research Bladecalculator, Pro/E and ANSYS/CFX are used to find the relationship between the blade rotating speed with torque. The analytical results of wind turbine completely match with that of test data. Comparison with data of generator, new design blade gets more power. The power of new design blades is about ten times as the original blades.
Abstract: Measurement method and model method are adapted to analyze harmonious relations between people in the sedentary state and office chairs in various parts by starting from human design perspective of the product and using ergonomics knowledge. The research aims to settle down the technical problems which related to design fitness by correctly applying the ergonomics theory. During design process should study and summarize the user-friendly design elements of health office chairs, methods and performance evaluation as well.
Abstract: This paper introduces the concept and characteristic of narrowing-mouth process, and the main technological defects and the influence factors of narrowing-mouth deformation degree. Processing technology of double closed ball head tube parts was analyzed and narrowing-mouth process was used to manufacture. On this basis, the content and steps for mouth process calculation were introduced detailed. The number of narrowing-mouth process, deformation degree of every process, the height of the blank and the size of parts were given. Meanwhile the press machine was selected. Combined with parts trial, the narrowing-mouth die structure was designed a detailed discussion of the work principle of the die, relationship and function of main parts of die were done. Through analysis of the specimen quality, the results explain that the narrowing-mouth technical calculation and die design can satisfy the processing technology of all the given parts. It can basically meet the design requirements. Finally the influence on narrowing-mouth process of neglected deformation and further research to improve it are pointed out.
Abstract: If the hand joints patients have not been taking autonomic or external force rehabilitation, they might become disabled, even leading the cause ofirreversible disability eventually. Generally speaking, the medical treatment of rehabilitation has been doing by physical therapist by providing patients with external forces rehabilitation assistance as far as we know currently. For the purpose of both of reducing the workload of physical therapists and providing the quantitative data obtained during the rehabilitation process so as for physical therapist’s reference. This research will build an automatic finger stretch and grip control system by using the Human- Machine Interface for operation control. It can be done by physical therapist or physical doctor to set the operating conditions so as to help the patients with their finger joints motion so as to achieve the rehabilitation effect of their fingers. This research is trying to integrate the mechanism and control technology mainly. With regards to the control technology, it uses a micro chip so as to lead the motions of the stretch & grip for finger rehabilitation by a signal processing control servo motor. And its operation interface is using an embedded system along with Visual Studio compiling software so as to touch input the operating conditions. The system operation functions are including single finger joint motion orsynchronized actuation of all fingers and the setting of the cycle numbers. Furthermore, in order to soften the finger tendons so as to promote the rehabilitation effect during the rehabilitation process, the system adds external steam in so as to control the internal temperature & humidity of the rehabilitation box and apparently, the whole finger automatic stretch & grip control system will be better owing to it.
Abstract: Multi-motor wheel independent driving technology is an important direction of electric vehicle(EV). Based on the analysis of the features of existing independent driving system of electric vehicle, a new dual-motor independent driving system configuration was designed. Complete parameters matching and simulation analysis of the system include motor, reducer, and battery. Distributed control network architecture based on high-speed CAN bus was developed, and information scheduling was optimized and real-time predictability was analyzed based on the rate monotonic (RM) algorithm and jitter margin index. The vehicle lateral stability control was achieved based on coordinated electro-hydraulic active braking. Based on the new dual-motor independent driving system, a new battery electric car was designed and tested. The results show that the vehicle has excellent dynamic and economic performance.
Abstract: The tool falling and vibration faults often occur in the process of tool changing, In order to improve the stability of the tools on automatic tool changer, a new structure of the manipulator is presented. The new manipulator contains two-point locking instead of the original one-point locking, and the tools can be clamped more tightly. When the old manipulator is slotting the tool, the forces are analyzed, and the working load and parameters is determined by calculating and analyzing the output curve of manipulator. The three-dimensional model is built in ADMS, and the validity of the new designed manipulator is verified by the simulation in a limit state. The simulation result shows that the new manipulator can increase the ability of tool clamping effectively.
Abstract: In view of the advantages of slotting modification processing and the difficulties in the design and manufacture of Modification Slotting Cutter, development for CAD / CAM system of modification slotting cutter’s design and manufacture for high-speed and heavy-loading gear has the following features:Firstly, the adaptive design of modification slotting cutter is implemented based on different modification target.Secondly,the precise design of modification slotting cutter is implemented by automatic regulating its section line position based on simulation results of the evaluation of the modification. Thirdly, the automatic regulation for fixture system and wire cutting process parameters of modification slotting cutter is implemented based on prediction model of slotting cutter’s pressure angle error, thereby reducing the design and manufacturing difficulty and to improve the precision as well as self-adaptability for modification slotting cutter.