The Experts below are selected from a list of 44193 Experts worldwide ranked by ideXlab platform
Liuru Zhou - One of the best experts on this subject based on the ideXlab platform.
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Study of fender NC incremental Sheet Metal forming
International Technology and Innovation Conference 2009 (ITIC 2009), 2020Co-Authors: Liuru ZhouAbstract:The principle of NC incremental Sheet Metal forming and the forming process of the fender are introduced. The effect of process parameters on forming is analysed. The improvement method of the forming quality is suggested. It is important that NC incremental Sheet Metal forming technology is perfected. The NC incremental Sheet Metal forming technology is a flexible forming technology without dedicated forming dies. The forming locus of the forming tool can be adjusted by correcting the numerical model of the product. Because the deformation of Sheet Metal only occurs around the tool head and the deformed region is subjected to stretch deformation, the deformed region of Sheet Metal thins, and surface area increases. Sheet Metal forming stepwise is to lead to the whole Sheet Metal deformation. The forming half-apex angle thetas and feed pitch p are the main process parameters in NC incremental forming of fender. According to sine law, it will succeed in fender incremental forming in a single toolpath if the forming is carried out with an angle which is larger than the forming limit half-apex angle. In this study, we get the following result through calculation: thetas = 30°. The feed pitch p increase, the process time decrease, production rate and surface degree of roughness increase. In general, the feed pitch is 0.25 mm. (3 pages)
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Strain Analysis of NC Incremental Sheet Metal Forming
Advanced Materials Research, 2011Co-Authors: Liuru ZhouAbstract:NC incremental Sheet Metal forming process is a flexible process which is to form the Sheet point by point on NC forming machine according to the prepared program .The forming principle of NC incremental Sheet Metal forming process is presented. The strain is analysed. A formula of strain calculation is drawn in the NC incremental Sheet Metal forming process and verified by web experiment.
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Study of cone NC Sheet Metal incremental forming
2011 Second International Conference on Mechanic Automation and Control Engineering, 2011Co-Authors: Liuru ZhouAbstract:The principle of NC incremental Sheet Metal forming as well as the process planning, experiment of cone forming are presented. Because the deformation of Sheet Metal only occurs around the tool head and the deformed region is subjected to stretch deformation and thins, and surface area increases. Sheet Metal forming stepwise is to lead to the whole Sheet Metal deformation. According to sine law, a cone with θ smaller than limit half-apex angle can't be formed by NC incremental Sheet Metal forming process in a single process, rather, it must be formed in multi processes. Thus, the multi time path process method is presented to form the cone, and the experiment is made to verify it. A cone can be formed from a Sheet Metal in NC incremental forming process by choosing appropriate tool-path planning. The fracture in the forming component can be avoided by these methods. A cone of uniform wall-thickness can be formed by NC incremental forming process.
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Study of Sphere NC Sheet Metal Incremental Forming
Advanced Materials Research, 2011Co-Authors: Liuru ZhouAbstract:The principle of NC incremental Sheet Metal forming as well as the process planning, experiment of sphere forming are presented. Because the deformation of Sheet Metal only occurs around the tool head and the deformed region is subjected to shear deformation and thins, and surface area increases. Sheet Metal forming stepwise is to lead to the whole Sheet Metal deformation. According to sine law, a sphere can’t be formed by NC incremental Sheet Metal forming process in a single process, rather, it must be formed in multi processes. Thus, the two time path process method is presented to form the sphere, and the experiment is made to verify it. A sphere can be formed from a Sheet Metal in NC incremental forming process by choosing appropriate tool-path planning. The fracture in the forming component can be avoided by these methods. A sphere of uniform wall-thickness can be formed from the truncated cone by NC incremental forming process.
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Study on Mechanism of NC Sheet Metal Incremental Forming
Advanced Materials Research, 2011Co-Authors: Liuru ZhouAbstract:The principle of NC incremental Sheet Metal forming process as well as the experiment of cone forming are presented. Because the deformation of Sheet Metal only occurs around the tool head and the deformed region is subjected to stretch deformation, the deformed region of Sheet Metal thins, and surface area increases. Sheet Metal forming stepwise is to lead to the whole Sheet Metal deformation. The experiment results show that in the case of the parallel line type tool path, a uniform thickness of the deformed region is maintained and in good accordance with that obtained by the sine law. It is found that success in the forming depends on the forming half-apex angleθof the truncated cone. It can be obtained that NC incremental Sheet Metal forming process is a plane deform process and conforms to the sine law, i.e.t=t0 sinQ.
Xiao Min Cheng - One of the best experts on this subject based on the ideXlab platform.
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The Experiment Study of Water Jet Incremental Sheet Metal Forming
Advanced Materials Research, 2011Co-Authors: Xiao Min Cheng, Lin Zhou, Liang Wang, ZhouAbstract:For the manufacture of panel parts, incremental Sheet Metal forming is significant in reality. This study put forward a method of incremental Sheet Metal forming: High-handed water jet with constant pressure and speed that caused by high pressure system acts on Sheet Metal and makes it out of shape, following transmutation superposition the requisite parts can be made. Based on this theory, a system of incremental Sheet Metal forming by using water jet is designed. At the same time, a forming experiment device is developed which is used to test the influence of water jet pressure, Sheet Metal thick, target distance to forming result. Finally, the optimized technological parameters of forming will be obtained. Within the work range, the higher pressure of water jet is, the more obvious forming result will be, and a great target distance will make forming result worse, besides Sheet Metal thick can make a difference of it. If Sheet Metal thick is invariable, there is interaction among pressure, target distance and feed velocity, so they influence forming result together.
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Simulation for Water Jet Incremental Sheet Metal Forming
2010 Second International Conference on Computer Modeling and Simulation, 2010Co-Authors: Xiao Min Cheng, Rufu Hu, Zaohui Cheng, Lin Zhou, Yueding WuAbstract:Water jet incremental Sheet Metal forming is a new method of Sheet Metal forming. Based on the feature of forming, simulation model is established, mesh generation is carved up, boundary condition and constraint are set, deformation degree is calculated, and after deformation degree and stress analysis an experiment of water jet incremental Sheet Metal forming is done. By giving a test to forming result, it can be known that the error between simulation result and experiment result is on the small side. It shows that the choice of model, initial parameters, boundary condition, constraint, and so on, in the simulation is basically reasonable, so a reference to that will be usefully for other parts simulation before processing.
Ralf Eckstein - One of the best experts on this subject based on the ideXlab platform.
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miniaturization in Sheet Metal working
Journal of Materials Processing Technology, 2000Co-Authors: T A Kals, Ralf EcksteinAbstract:Abstract Miniaturization of Sheet Metal working processes causes changes in the relative contribution of relevant process parameters. As a result, so-called second-order size effects occur. The present paper should give a survey of different kinds of second-order size effects that can be expected in tensile testing, air bending and punching of Sheet Metal. These size effects show to be commensurable when the process conditions are similar to a certain amount, as it is the case for tensile testing and air bending. However, they change or even diminish when the process conditions are very different, as for example in punching.
Su Hong-yan - One of the best experts on this subject based on the ideXlab platform.
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Method of Sheet-Metal Outspread Based on Pro/E
Mechanical Engineering & Automation, 2006Co-Authors: Su Hong-yanAbstract:This article analyses the outspread method of the Sheet-Metal working based on Pro/E by comparison with the traditional method.It explains the advantages,the practicality and the economical way of Pro/E-based outspread method of the Sheet-Metal and gives a conclusion that the notice should be taken in the process of Sheet-Metal outspread.A kind of practical and highly effective outspread tool is provided for the Sheet-Metal working.
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Analysis of Pro/E Sheet Metal Outspread Characteristics and Notice
Packaging and Food Machinery, 2006Co-Authors: Su Hong-yanAbstract:This article analyses the Pro/E outspread Method of the Sheet Metal working by comparison with the traditional method. It explains the advantages, the practicality and the economical way of Pro/E outspread method of the Sheet Metal and gives a conclusion that the notice should be taken in the process of the Pro/E Sheet Metal outspread. A kind of practical and highly effective outspread tool is provided for the Sheet Metal working.
M P Pereira - One of the best experts on this subject based on the ideXlab platform.
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Tool wear analysis in Sheet Metal stamping
2020Co-Authors: M P PereiraAbstract:This thesis advances the understanding of die wear in Sheet Metal stamping. It was found that transient conditions exist at the die radius, resulting in severe contact pressures that are critical to the wear behaviour. The findings challenge applicability of traditional wear tests and models for Sheet Metal stamping processes.
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Tool Wear in Sheet Metal Stamping
Advanced Materials Research, 2011Co-Authors: M P Pereira, Bernard F. RolfeAbstract:This paper discusses our recent research on wear at the die radius in Sheet Metal stamping. According to wear theory, contact pressure and sliding distance are the two dominant factors in determining sliding wear. We applied the finite element analysis to accurately quantify the contact pressure and sliding distance at the die radius in Sheet Metal stamping. The results were then applied to analyze sliding wear at the die radius. We found that a typical two-peak steady-state contact pressure response exists during a channel forming process. The steady-state contact pressure response was preceded by an initial transient response, which produced extremely large and localized contact pressures. We proposed a method to numerically quantify the sliding distance, which was applied to examine the contact sliding distance at the die radius. Correlating the contact pressure and sliding distance, a new insight into the wear/galling that occurs at the die radius in Sheet Metal stamping was gained. The results show that the region close to zero degrees on the die radius is likely to experience the most wear, with the identified transient stage contributing to a large proportion of the total wear.
