Advanced Materials Research Vols. 989-994

Abstract: As an important mean to ensure machining accuracy, the dynamic measurement and intelligent fault diagnosis technology can be used in aviation manufacturing machine. In recent years, several theoretical results are gotten on weak signal feature extraction, multiple sensor information fusion of early fault identification as well as the set up of embedded online monitoring units. This article is the summary of those results, the existing problems is analyzed, and the trend of the development in this field is also discussed.

Abstract: Communication module design is one of the key technologies in offshore drilling platform cleaning robot, through overall design and analysis of communication systems, the communication module is selected and technology roadmap is analyzed. thus communication module hardware architecture (PC, PLC and multi-sensor ) is designed, multi-sensor (Sonar, infrared, camera, SINS, pressure sensors and fiber optic gyrocompass) underwater monitor is designed and selected, the system software is programmed (PC configuration software, PLC software and communication protocol software); Finally, control structure and running track is designed. The research ensures the operation accurately and improves the cleaning efficiency.

Abstract: As ground support equipment, drag parachute packing machine is used for packaging aircraft drag parachute. It is driven by high-pressure inert gas. Drag parachute will be compacted in the cylinder loading institution by high pressure. The overall structure of drag parachute packing machine is designed. The finite element analysis and structure optimization of drag parachute packing manipulator is completed. The pneumatic control system is designed. It provides an approach for drag parachute packing technology.

Abstract: PMAC motion controllers serve not only as a receiver of the orders from CNC systems of many kinds, but also as a controller of the motion of machine tools’ axles. With G83 as an example, a code commonly seen in the processing cycle of deep holes in CNC machining centers, it is advisable to come up with a method to write a special set of subprograms to invoke PMAC motion controllers with the application of G-code. Based on the method, case programing and machining simulation can be launched. Experiments justify that the method obtained can realize the compiling of fixed cycles with the use of G-code and, in turn, boast substantial significance in the development of open CNC processing machine tools.

Abstract: The problem of air pollution is very serious now, so it is important for developing a monitoring mechanism of PM_2.5. An automatic changing film mechanism is designed and manufactured in the paper. Then static stress, vibration analysis and structural optimization are carried out by Solidworks software. Experiments show that the mechanism of PM_2.5 is reasonable and reliable.

Abstract: Disaster Rescue Robot is a small caterpillar robot used for carrying first aid articles, reasonable shock-absorbing system is an indispensable part to reduce the rush of the ground because it has to plummet from a certain level to the ground when it works. We use the method of modular design in this article and design the landing gear based on the performance of conical spring in order to absorb some of the forces during a fall. Then the three-dimensional modeling software is used to establish the parametric model of the robot shock-absorbing system to provide an effective way for the design of the Disaster Rescue Robot.

Abstract: To avoid fatal accidents caused by premature gear failure of cooling tower fan, research and analysis of gear tooth surface pitting and tooth breakage which are the two main failure forms of cooling tower fan gear are conducted in this article, the specific reasons of the fan gear failure are got, and corresponding suggestions of improvements and preventive measures are put forward, this can be taken as reference to the gear design and fault analysis.

Abstract: Viscous pressure forming (VPF) is a new developed sheet soft-punch forming process in 1900s. The basic principle and characteristics of VPF are described. The applications of VPF technologies of nickel-based super-alloy corrugated thin-walled part, asymmetrical thin-wall part with variable diameter, super-alloy thin-walled part with variable diameters, corrugated thin-walled part with larger diameter and small section are presented. The results show that VPF is suitable for the forming of parts with high strength, low plasticity, super thin-wall and complex shaped.

Abstract: There are a variety of sheet metal parts in rocket body structure. The exact length calculation of sheet metal structure work is the key to ensure better quality of product. This paper describes two methods of sheet metal part unfolding which are method of formula and method of software. Two quick unfolding ways using AUTOCAD and EXCEL are described aim at method of formula. Summarize the notes of using Pro/E to unfold aim at method of software. span>Parts Unfolding

Abstract: With the development of welding power control technology, pulsed welding technology was becoming more and more popular, for it could control the droplet transfer process by pulse current. In this paper the characteristic of pulsed welding technology was analyzed, and the equipment—welding pulse controller was introduced, which could upgrade the existing welding system to pulsed welding system without too much changes. This paper introduced pulsed MIG welding system and double wire pulsed welding system constructed by welding pulse controller, and the development prospect in the welding field is described.