By R. Ganesh Narayanan, Uday Shanker Dixit

This edited ebook comprises prolonged examine papers from AIMTDR 2014. This comprises fresh study paintings within the fields of friction stir welding, sheet forming, becoming a member of and forming, modeling and simulation, effective prediction techniques, micro-manufacturing, sustainable and eco-friendly production matters and so on. it will turn out invaluable to scholars, researchers and practitioners within the box of fabrics forming and manufacturing.

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Extra resources for Advances in Material Forming and Joining: 5th International and 26th All India Manufacturing Technology, Design and Research Conference, AIMTDR 2014

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The design of tooling (die and punch) for complicated shapes is very difficult and costly. In incremental forming technique, only a DT is required for deforming the sheet metals. There are four basic elements of an ISF process as shown in Fig. 1—a sheet metal, a blank holder, a single-point forming tool or DT, and CNC machine. The shape of DT may be hemispherical. The design of DT is quite simple and economical. A CNC controller having capability for controlling individual 3 axes can be used to control the movements of the DT.

The forming forces in X- and Y-direction are repetitive in nature. The forces in X- and Y-directions were also increased gradually. As the tool moves in Z-direction, the deforming force in Z-direction is found increasing. The force predicted in X-, Y-, and Z-directions are represented in Figs. 14, 15, and 16, respectively. 3 Development of Single-Point Incremental Forming Machine The major elements of ISF are identified as follows: (i) a sheet metal blank, (ii) a blank holder, (iii) a single-point forming tool or DT, and (iv) CNC machine.

Inverse analysis provides the material parameters σ0, n, m, and γ and the coefficient of friction μ of different materials, viz. AISI steel, copper, and aluminum alloy AI6061-T6 as given in Table 4. , in 3–4 iterations for all three different materials of strip. The convergence depends on the initial hypercube size of the unknown parameters. Starting with a large range of domain is better, but the number of iterations required for convergence will be large. Figures 8 and 9 show the variation of flow stresses with strain at the estimated and the actual material properties for work material (steel) of strip.

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