Key Engineering Materials Vols. 579-580

Abstract: The numerical control machine tool, which is a typical energy-using product, because there are all sorts of energy loss and auxiliary functions, has low efficiency in machining process. Author makes a study of NC machine tool energy consumption controlling. With simens840Dsl numerical control system as an example, based on the analysis of CNC system control principle, according to processing characteristic of the part, the macro program is wrote to optimize dynamic characteristics of NC machine tool. According to the machine idle time in different work condition, three energy-saving control profiles are formulated, including machine standby, NC standby, auto shut off. By the formulation of the corresponding PLC control logic, low energy consumption of intelligent control of NC machine tool is realized. Integrate PAC3200/4200 multi-function meter in NC machine tools, quantitative measurement and analysis of energy consumption for numerical control system and ancillary equipment can be implemented, and machine tool real-time energy data can be obtained. This scheme has been successfully applied in long-men portable CNC machine tools, and obtained the ideal effect: to realize the optimize control of energy consumption, improve the performance of the machine tool, become more market competitiveness.

Abstract: With the information technology development, the manufacturing informatization has developed rapidly in recent years. 3D computer aided design (CAD) has become indispensable for developing new products. Network also plays an important role in exchanging information. In this case, people have a growing tendency to exchange information by 3D model rather than text or images. Through network platform to provide 3D dynamic display and lectotype service becomes the trend of the development gradually. So in this paper, a 3D dynamic display and interactive lectotype system was presents for mechanical design. This paper put forward a solution to exchange information by 3D model by integration of 3D CAD and Web3D techniques. Use the Viewpoint technique to displays interactive 3D models. Base on SolidWorks to exchange the 3D CAD model to Viewpoint model, and generation 2D and 3D commonly format files for downloading. Use database management system to manage all kinds of data. Proved by practice, this system can significantly increase conversion and improve the customer experience

Abstract: With the large scale automotive production and high flexible assembly line, the OEMs have the new challenge on real-time material replenishment. This paper analyzes the current research and application on material replenishment model, line feeding strategies, and distribution control. A TPL based assembly line feeding service frame is proposed. The mode, calculation logic and service flow of material line feeding are discussed in detail. The application results shows that it can satisfy the assembly line real-time material replenishment requirements, reduce the inventory by the line, and further balance the volatility of production material pulling. And through it, the TPL also expands its value-added service content.

Abstract: With the help of the computer simulation technology, the virtual machining simulation system of NC machine tool was built based on the integrated simulation module of the UG NX software. Through setting the NC machine parameter of the virtual machining system, the machining process simulation of the typical parts in virtual environment was completed, which implements the collision and interference checking in the process of NC machining and verifies the correctness of NC programs. Finally, the simulation results prove that the assembly modeling method of virtual simulation system for the NC machining is feasible, and the simulation of machining process can effectively determine the mutual interference problem of the machining system, which lays the foundation for effectively preventing the collision accident.

Abstract: Aiming at the importance of interface in adaptable design of mechanical products, in this paper, research actuality and development of the Mechanical interface are talked over; and the basic requirements and design criteria of adaptable interface design are discussed; lastly, what capability an adaptive mechanical interface must possess is illustrated combing with a specific case, and the adaptable interface in the case can also be applied to similar structure design of other products.

Abstract: In order to reuse 3D models and design knowledge efficiently, a number of 3D model retrieval algorithms based on content features of models have been proposed in recent years. Although, the features-based methods have achieved some progress, there are two limitations stilly. The first, single content feature cant be suit for all kinds of 3D models; different features have different strengths and weakness. The second, semantic gap, the semantic of model is independent from low-level characteristics. For those two issues, we present a 3D engineering model retrieval algorithm based on relevance feedback and features combination in this paper. The proposed method takes advantage of multiple features by allying them with weights. In the retrieval process, our method utilizes the Particle Swarm Optimization to update the weights dynamically based on users relevance feedback information in order to narrowing the gap between high-level semantic knowledge and low-level content features. The Experiments, based on publicly available 3D model database Engineering Shape Benchmark (ESB) developed by Purdue University, suggested that the proposed approach has better retrieval ability than traditional ones.

Abstract: The base of Parallel loading device withstand the pressure of hundreds of tons, Limited by the conditions of use, All components of the device must be manual handling, so Its weight becomes very sensitive. The initial design weight of base are about 170 kg, By handling environmental constraints, four men lift is also very convenient, Therefore it's urgent to reduce weight. In this paper, a powerful modeling capabilities of UG combined ANSYS topology optimization module on the base for a topology optimization, We refer to the shape of topology optimization design of the final design of the structure. Through finite element analysis, the structural stiffness and strength to meet the design requirements, And weight decreased from about 170 kg to 120 kg, reduced by nearly 30%.

Abstract: The traditional cars consume high energy and the energy of vibration is wasted. To solve these problems, a new energy recovery damper was designed by analyzing the principle of vibration energy recovery and the advantages of electroactive acrylic elastomer materials. The three-dimensional modeling was finished for the mechanical structure of the energy recovery damper. As an important constituent part of vehicle suspension system, the energy recovery damper was a nonlinear vibration system which contained elastic force and damping force. The system could generate random vibration with the drive of the sources such as pavement roughness and engine. The vibration energy can be recycled and stored into vehicle battery by the energy recovery damper. The energy could be saved by changing the vibration energy into electric energy. The energy recovery damper has the advantages of simple structure and high efficiency.

Abstract: This essay briefly introduces a structure scheme design of a high diameter-length ratio rotary plate. This structure scheme is unique from any well-known schemes. In this scheme, there is only one flat act as the working flat for both main thrust bearing and aux thrust bearing. It minimizes the faces which need lapping. At the same time, this scheme minimizes the number of assembling parts. So, it will be easier for this scheme to achieve high accuracy. This essay includes the process of design: calculation for bearings and schemes compare.

Abstract: Proposed a rapid and accurate parametric modeling method for involute gear design based on UG/Open Grip with the capacity/function-extending database. The dimensional constraints were adopted for the portability and universality. Through the human-computer interaction interface of the modules, the user may need only to change the corresponding parameters to obtain the desired cylindrical gear model. CAD data were collected and accessed in the process to form an independent database. Realization of a gear design was done with the relatively independent database, so that different applications can exchange data with the database, being conducive to data maintenance and expansion. Example was given to verify the correctness and the effectiveness of the modeling method with the database.