Applied Mechanics and Materials Vols. 496-500

Abstract: Nowadays the workover rig is more often used in outdoor work, and the field environment is complicated and changeable.Therefore, it becomes extremely important to conduct a detailed analysis of stress of the workover rig derrick translational system.This paper takes Liaohe Oilfield new vehicular pressure balance workover rig derrick translation system as an example, a finite element analysis model is established to analyze the stress conditions of the derrick truck system.The result completely conforms to the actual requirements, thus verifying the rationality of the design and providing the basis for the optimization design of the translation system.

Abstract: This paper presents a maize stalk model established with the discrete beam method through UG to create the crop spike-picking roller model with a kinematics simulation analysis based on ADAMS. This method systemizes the parameter design of spike-picking roller divider with a necessary 3D model for the actual needs. It shortens the development cycle and provides certain theoretical basis for the development of the new self-propelled maize harvester.

Abstract: In this paper, valve train has been designed and analyzed to meet the requirements of the specified valve lift profiles, mechanical stresses and engine packaging. Valve train dynamic analysis has been used to confirm satisfactory dynamic response.

Abstract: In recent years, with the rapid development of automobile, the production of complex parts adopt the die casting process such as crankcase box. the stress of market competition make greater demand on Casting Products quality, such as the organizational structure of products has no shrinkage porosity defect and has good mechanical properties. this articles simulation analysis of die casting forming process for Box are based on software AnyCasting, analyzing the reasons of air trapping from the filling process, Solidification sequence, Residual melt modulus. and it can conduct local extrusion feeding towards location of shrinkage porosity. By analyzing the metallographic structure we known that Local pressurization could refine Casting organization grain and make the grain more dense.

Abstract: For analyzing the distribution of the pulse current on the hollow cylinder surface, different pulse currents distribution characteristics of hollow metal cylinder surface are simulated by CST (Computer Simulation Technology) software. The results show that, different pulse currents injected in the cylinder submit to the same distribution basically; the difference in the length or the thickness of the cylinder have no significant effect on the current distribution, but the distribution changes greatly as the external diameter changes. The work in this paper provides a reference to analyze the lightning pulse current distribution of high tower building surface.

Abstract: In the study of humanoid robot, the system design and analysis of the legs is the foundation of realizing humanoid walking robot. In this paper, structure design of each leg joint has been introduced, and according to the degrees of freedom of each joint distribution, using screw theory and exponential product formula to establish the mathematical model of the legs, to analyze the kinematics of the legs, finally obtains that the range of joint movement comply with the design requirements.

Abstract: The flexible bearing break is an important factor to influence the life of harmonic drive, this paper first introduces the research situation of fatigue fracture above this the design of flexible bearing fatigue life test device of the no-load and load conditions. The device includes a driving part, a loading device, the break device and the monitoring device of bearing`s revolution when it break.

Abstract: In this paper, the development process of BOPF technology was described, the tubular film stretching method and planar biaxial stretching method were compared, several types of one-step biaxial stretching equipment were introduced, and the prospect of the development of biaxial stretching was given.

Abstract: This paper introduces the basic principle, the compost system design requirements, and to introduce biodegradable composting system and design. At the same time design the structure and layout of a small biodegradable compost pool. Base on introducing the small turning device to complete a small spiral turning device of the mechanical system design.

Abstract: In ordinary lathe turning workpiece before, must first adjust the turning tool nose aim at spindle centre. But in the real machining cutter bar itself due to different specifications, you need to add the shims in the cutter bar below to adjust the height to meet the lathe tool nose alignment chuck center. But this traditional method often turning tool itself reduced rigidity, affected by the roughness of the machined surface, in order to solve this problem, this paper will newly design to reasonable of turning tool holder, make the turning tool holder height according to the requirements of the upper and lower adjustment, solve the insufficient rigidity of turning tool, workpiece surface roughness difference, eating tool, tooth type angle is not accurate and other issues, the following discussion is made on the structure design. Context Development is important, on the basis of ensuring processing quality, improve productivity, existing equipment, is now as the industry is the rapid development of China's urgent need to solve the problem, in order to make a country really strong, must be developed industrial base, in the machining of this big family, Especially ordinary lathe, but a high quality processing lathe and process parameters is the total goal of development of manufacturing industry. As the machine tool operator is the first to consider how to improve the existing machine, the machine speed, reduce the processing time, reduce the auxiliary time, to improve production efficiency, and as the main auxiliary components-lathe tool holder, should also continue to improve and perfect its function. Although the lathe tool holder has emerged many improvements, but also part of the failure to meet, but these are temporary, so we must spend considerable to devote themselves to the improvement of equipment, this article tells about a scheme of ordinary lathe tool holder with improved.