Bulk forming of sheet metal

Finite element analysis of springback in bending of aluminium sheets

Thinning and spring back prediction of sheet metal in the deep drawing process

Computer aided analysis and design of sheet metal forming processes:: Part III: Stamping die-face design

Due to the improvement of the mechanical properties of polymer composite belts used in vacuum belt conveyors, its perforation process causes a lot of technical issues for manufacturers worldwide The objective of this paper is to analyze the belt punching process with two cutting edges and present the influence of the piercing punch shape on the perforation force Based on the analysis, the analytical stress model was derived and validated by using both empirical and FEM tests The application of the proposed model was proved by presenting the methodology used to estimate the perforation force for the flat piercing punch based on the mechanical properties of the belt obtained from simple strength tests (uniaxial tension, compression, and shear), with an error between 4 and 15% In this report, the analysis of the piercing punch profiles was made and eight different piercing punch profiles were tested Presented results confirmed that the spherical bowl punch may be considered as a most effective tool for belt punching, because it reduced the perforation force by 60% and the precision of the created holes was the best among the tested punch profiles for all three groups of polymer composite belts By combining the obtained results, in the form of shape factors β, with the perforation force approximation model, it is possible to calculate peak force value for the specified tool profile and belt type and use this data in the design process of the punching dies

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Estimation of the perforation force for polymer composite conveyor belts taking into consideration the shape of the piercing punch

Basic Die Design and Die-Work Influencing Factors. Theory of Sheet-Metal Behavior. Metal Stamping Dies and Their Function. Metal Stamping Dies and Their Construction. Metalworking Machinery. Blanking and Piercing Operations. Blank Calculation or Flay Layout. Bending and Forming Operations. Drawn Parts. Evaluation of a New Die Design. Progressive Die--Strip Layout. Springs, Their Design and Calculations. Spring Washers. Materials and Surface Finish. Die Cost Estimating. Appendix. References. Index.

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Ivana Suchy

Papers

Handbook of Die Design