Journal of Applied Metalworking
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Punch friction tests for sheet metal forming
Journal of Applied Metalworking - Tập 3 - Trang 3-11 - 1983
A previously described tensile strip test which simulates the stretching of sheet over a punch corner radius in a typical draw die was used to compare frictional effects in different sheet materials. Various grades of steel including galvanized samples were tested as well as soft and age-hardening aluminum alloy sheets. The measured friction coefficients varied over a wide range and the experiment......
A new method for calculating spread in rod rolling
Journal of Applied Metalworking - Tập 2 - Trang 94-99 - 1982
For the development of a new spread formula for computer control of rod rolling process, the spread characteristics of hot rolling of mild steel rods in the Square-Oval, Round-Oval, Square-Diamond, and Diamond-Diamond passes were experimentally investigated. The conclusions are summarized as follows:
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A method to develop multistage forming limit curves for copper alloy strip
Journal of Applied Metalworking - Tập 3 - Trang 157-164 - 1984
Technology has been developed to assess the consequences of prior plastic deformation on forming limits of copper alloy strip. Procedures are described that allow gridstrain analysis of small parts fabricated by variable strain paths in multistage presses. The specific test methods are illustrated through analysis of the effect of biaxial prestrain on the subsequent forming limits of C260 alloy sh......
A review on the finite-element method and metal forming process modeling
Journal of Applied Metalworking - Tập 2 - Trang 163-169 - 1982
Recent developments in the application of the finite element method to metal forming process modeling are reviewed. Various finite element approaches, namely, elastoplastic, rigid-plastic, and viscoplastic analyses are presented, including the coupled analysis of heat transfer and metal flow. In concluding the role of finite element analysis in future metalworking technology is indicated.
Development of a predictive model for draw bead restraining force utilizing work of nine and wang
Journal of Applied Metalworking - Tập 3 - Trang 38-44 - 1983
By using a virtual work approach and considering the effect of anisotropy and strain rate, a regression model was developed that accurately predicts the draw bead restraining force for rimmed steel, aluminum killed steel, 2036-T4 aluminum, and 5182-0 aluminum from experimental work by Nine2 using a draw bead tester. It has been shown that by differentiating a regression model it is possible to qua......
Manufacturing Processes for Engineering Materials,Serope Kalpakjian
Journal of Applied Metalworking - Tập 3 - Trang 446-446 - 1985
Effect of MnS inclusion size on machinabilty of low-carbon, leaded, resulfurized free-machining steel
Journal of Applied Metalworking - Tập 4 - Trang 214-225 - 1986
The effect of maganese sulfide inclusion size on the machinability of low-carbon, leaded, resulfurized, free-machining steel was investigated by plunge machining using high-speed steel cut-off tools. The cutting and thrust forces were measured as a function of cutting speed. It was observed that the force-cutting speed curves are shifted toward higher cutting speed and tool life to catastrophic fa......
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