Advanced Materials Research Vol. 940

Abstract: As a universal component connection and power transmission gear box, is widely used in the modern industrial equipment, but also an easy failure parts, has a great influence on the running state of the working performance of the whole machine. This paper first analyzes the gear box fault form and characteristics, the gear box fault diagnosis method based on vibration signal analysis, and analysis of the vibration signal processing method for gear vibration signal analysis in time domain, including parameters, resonance demodulation method and cepstrum analysis method. Then using Visual C + + language and data acquisition card for real-time acquisition of gearbox vibration data software, including parameter setting, data acquisition module, signal real-time display module and data storage module. The data acquisition program is developed, the actual acquisition of gearbox vibration data of gear fault and bearing fault, and analyzed.

Abstract: Center line correction is an important work in the assembly and maintenance of self-propelled artillery. Targeting the complexity of centerline correction and low accuracy, a self-propelled artillery center line correction apparatus was developed on the basis of DSP technology. The device can directly display the thickness of the measured components that needed to be modified and adjusted. The measurement works in a simple and convenient manner, which greatly improve the measuring precision, and significantly accelerate the assembly and repair schedule. Through a simple transformation the correction device can be applied to the assembly and maintenance of other vehicles, featuring strong versatility and wide range of trial.

Abstract: The planetary lapping is an effective method to improve the precision and efficiency, to obtain the ideal grinding trajectory by changing the planetary structure on the basis of the traditional abrasive mechanism. In order to grinding double plane of multi workpieces at the same time, first the design specific analyze the trajectory, Then, the planetary grinding structure is designed according to the processing requirements, and finally, the trajectory of the lapping is simulated by the kinematics and geometry, in order to verify its availability. The grinding machine is not only has a high machining accuracy and machining quality, but also is simultaneously used in the multiple workpieces having different cross-section within a certain size, in addition, it improves the processing efficiency and reduces processing costs. tables etc.

Abstract: Serial industrial robot has been widely used in assembly, welding, painting and other fields in which high kinematic performance is required. In this study, an non-contact approach for accuracy measuring is presented. Comparing with the traditional method based on spherical coordinate system, the approach presented in this study is based on the Cartesian coordinate system which has higher measuring accuracy. Furthermore, kinematic performance evaluation experiments for two types of industrial robot prototypes are proceeded. Experimental results testified that the accuracy of the target robot and proved the efficiency of the approach.

Abstract: Giant structure processes involve highly dangerous manual welding operations. aiming at the welding for giant structures, tankers and other large work pieces, a five degrees of freedom (DOF) gantry type automatic welding robot was developed which has our own property right. Forward/inverse kinematics for the mechanical structure is analyzed in which pose of the welding torch is defined as a free vector. Then kinematics equations were proposed for torch pose fitting. Finally, simulation results for robot kinematics analysis and torch pose fitting were also proposed with Matlab. The result not only proves the feasibility of torch pose fitting, but also provides a basis for further study on kinematic analysis, torch pose fitting and off-line programming about gantry type automatic welding robot.

Abstract: In automobile industry, automobile welding fixture is component important to auxiliary welding. The automobile body is welded by multiple complex sheet stamping parts and other auxiliary workpiece. In the process ,supporting role of welding fixture is an important step. In this paper, the fixture welding was designed and analyzed briefly.

Abstract: The development of CAD and CAM technology makes it more process to inspect surfaces of the part, this is usually carried out by CMM. With the research of the error analysis of cutter location for unequal diameter side milling of cylindrical cam, the technology using CMM to inspect surfaces by Pro/E CAD model is analysed from some key aspects: Pro/E modeling; set up coordinate ; and probe compensation.

Abstract: A survey of study on dimethyl ether engine fuel supply system at home and abroad was described, including pump-pipe-nozzle system and common-rail fuel supply system. The main trouble of practical application of dimethyl ether engine is wear and leakage problems in the fuel delivery system caused by low viscosity of dimethyl ether. For controllable premixed combustion of dimethyl ether engine, a fuel injection system is developed which is consisted of a diaphragm pump and a wear self-compensation nozzle or an independent lubrication nozzle. The system is expected to solve the above problems essentially and becomes a development direction for the future.

Abstract: In modern industrial processing of the materials, the solution spraying technology is widely used. Spraying a layer of special solution plays an important role to change their physical and chemical properties. Based on single-axis servo control, precision solution spraying system is able to spray a very thin and a uniform layer of solution on the surface of materials as required. The spraying system mechanical structure is mainly composed of these parts: housing, single-axis servo translation stage, push-pull syringe, multifunctional nozzle and other components. The servo translation stage is capable of providing precise control of speed and stroke by using a specialized controller and driver. The system is running stably and smoothly throughout the experiments after the completion of the entire system assembly and it can fully comply with the requirements of customers with excellent sealing performance, feature-rich and human-friendly control interface and compact mechanical structure.

Abstract: Stiffness is a very important property of automobile panel, especially for high-strength thinning sheet due to personnel security and energy conservation on auto industry. It is difficult to study because of the complexity streamline feature of auto body. An experiment method for determining stiffness was presented. The experiment study models of which based on the hyperboloid shallow shells that could represent automobile panel’s surface features was established. The criterion and research technique of automobile panel stiffness were introduced. The experiment research works of effects of two main process conditions on stiffness which blank holding force (BHF) and boundary condition during the stiffness test were obtained. All conclusions provided a particularly effective process guidance and technical approach in the automobile panel production.