Experimental investigation of the strain state in the ring-forging process |
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| Affiliation: | 1. Department of Soil and Crop Sciences, Colorado State University, Fort Collins, CO, USA;2. Graduate Degree Program in Ecology, Colorado State University, Fort Collins, CO, USA;3. Department of Natural Resource Sciences, McGill University, Montreal, Quebec, Canada;1. School of Mechanical and Electrical Engineering, University of Electronic Science and Technology of China, Chengdu 611731, China;2. Center for System Reliability & Safety, University of Electronic Science and Technology of China, Chengdu 611731, China;3. Science and Technology on Reactor System Design Technology Laboratory, Nuclear Power Institute of China, Chengdu 610213, China;1. State Key Laboratory of Electrical Insulation and Power Equipment, Xi’an Jiaotong University, China;2. Institute of Polymer Materials and Plastics Engineering, Clausthal University of Technology, Germany;3. Beijing Aeronautic Science and Technology Research Institute of COMAC, China;1. Hubei Key Laboratory of Advanced Technology for Automotive Components, Wuhan University of Technology, Wuhan 430070, China;2. Hubei Collaborative Innovation Center for Automotive Components Technology, Wuhan 430070, China |
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| Abstract: | A method for calculating the strain state during three-dimensional plastic deformation is presented. The method is based on the measurement of the co-ordinates of net nodes marked on the surface to be investigated: in the present case the method is applied to the ring-forging process.Specimens were forged between the mandrel and a flat die and also between the mandrel and a die of inverted V-shape with included angle ϕ=135°. The results obtained in the tests allow an assessment of the influence of the relative width of the specimen, α (α=original width of the ring divided by its origianal outer diameter), and the relative diameter of the mandrel, δ (δ=diameter of the mandrel divided by the I.D. of the ring), on the strain state in the deformation zone.A flat die and a relative diameter of the mandrel of δ⩾0.8 afford less inhomogenity of strain and less irregularity of the cross-section in comparison with the results of using the inverted V-shaped die. |
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