Advanced Materials Research Vol. 500

Abstract: The buckling of hydraulic support column is analyzed theoretically with the theory of the pressure rod stability. 3D digital model of the hydraulic support column is built with Pro/E, also buckling analysis and analogue simulation with ANSYS to the model are carried out. The critical buckling load of the column is obtained. The buckling analysis result is picked up and discussed, and compared with the theoretical calculation. The finite element analysis result is agreed with the theoretical result.

Abstract: In this paper, a novel method is proposed to generate optimal 5-axis finish tool-paths regarding joint movements and machining efficiency. A modified genetic algorithm is used to search for the optimal posture sequence along a tool-path while interference avoidance and surface finish quality act as constraints. Case studies are then provided to prove the effectiveness of the algorithm.

Abstract: To solve excessivly large deformation and vibration problems in machining large tube section, ensure the machining accuracy and quality of the tube section, the main tool carrier system of a large vertical lathe is designed, by simulation means of finite element, static analysis, dynamic modal analysis and dynamic response analysis are respectively carried on the main tool carrier structures designed. A reasonable overhang length of the tool in the tool carrier system is given through static analysis, dynamic modal analysis show the higher natural frequency of the tool carrier system, the production of cutting resonance can be avoided, the maximum response and corresponding stress conditions of the system under the harmonic loads are given by dynamic response analysis, analysis results show that the sustainable dynamic characteristics of tool carrier system can meet the machining requirements.

Abstract: the robot working space is the volume which a reference point on its wrist to be reached. It is an important evaluation index of the robot geometry characters. Firstly, the size of the movable cotton robot palletizer structure is calculated by analyzing its movement, then, its working space is calculated base on graphing method. This method is working as these: a referent point P on the wrist is selected, the space of it reaching will be the volume which is the movable cotton robot palletizer working space, by fixing a limiting position at a robot wrist, the reference point P on the total working space XOY is analyzed by drawing, the geometrical analysis and calculation method are used to acquire the motion curve equation, within XOY plane, the movement of the wrist and two slides is decoupling to calculate the limiting position of the robot wrist movement, at the end, the final movement space of the robot is determined.

Abstract: The current domestic and international structure of reconfigurable robot and reconfigurable machine tool have been studied by us, their topological characteristics and methods of conversion were summed up, the method of reconfigurable machine to converter topology was found to achieve the purpose of reconstruction of the machine comparing the two different areas of the module types and functions.

Abstract: The aim of product configuration is to satisfy the customer's personality requirements with low manufacturing cost. Based on the relationship of customers performance requirements and satisfaction, a method of product configuration optimization was proposed. The customers performance requirements are divided into three types with Kanos theory. A multi-objective genetic algorithm with objectives of performance satisfaction, manufacturing cost and lead time was designed to solve this multi-objective optimization problem. A case study is conducted to demonstrate the effectiveness of the proposed approach.

Abstract: Deep brain stimulation (DBS) is increasingly used in clinical treatment for various neurological disorders, particularly for movement disorders such as Parkinsons disease. The more the accuracy of locating the cerebral target of these diseases is, the more cure effect is, the accuracy of locating the cerebral target depends on the all surgery system. Although there have many surgery systems, for more accuracy of those locating target based on CT images, it need to develop a new kind of robotic surgery system. Some requirements of this robotic system are present in this paper, such as the movement degrees of freedom and its dimension error. Each functional sub-system of this robotic surgery system with some constraint condition is also analyzed. When all of those sytem are implemented with more precise location, predictability, reliability, and robustness sufficient for trial evaluation in stereotactic biopsy of brain lesions, the robotic surgery system can be used in clinical application.

Abstract: In recent years, a new technology is produced in automobile manufacture. It is to detect the quality problems for the fabrication of final drive on its production line. In order to study it this paper firstly analyzes the causes of failure about key components on final drive and introduces the principle and implementations of a on-line monitoring system based on order analysis. In contrast with traditional fault diagnosis methods, this method can solve the Frequency Blur Phenomenon when the turning speed changes. The experiments show that based on order analysis this system can identify typical faults of final drive, such as teeth-surface fault for driving gear, bending of main shaft, fault for driven gear, fault for bearing and so on. By detecting the change of energy of different order, the product quality can be controlled and the manufacturing technology can also be improved.

Abstract: According to analyzing the influence factors of shaft fatigue properties, the matching relationships between fatigue properties and shaft material as well as other relevant factors have been investigated. And the matching relationships have been demonstrated via experimentation. A useful method is established to enhance material fatigue toughness. Considering the aspects of safety, economy and the requirement of fatigue strength, when the dimension of the structure could not be changed, the fatigue properties can be improved via increasing the fillet of the shaft. And 45 carbon steel is a highly recommended shaft material.

Abstract: Optimized path and NC code to machine joint surface of the transmission box had been obtained in UG CAM module. Then, the code was imported into Vericut in order to control the virtual machine to mill the boxs joint surface. As a result, the simulation process machining the joint surface of the transmission box was achieved. Meanwhile, the collision and interference were all verified as well. The accuracy of NC code was not only tested but also modified in this simulation process. Due to this work has been finished, the production cost will be decreased and the production cycle will be shortened. It is of great guiding significance for the practical production process.