Lexington-Concord Sesquicentennial half dollar Monroe Doctrine Centennial, this coin does no credit to Beach's stature as a first-class artist. What the coin exudes in patriotism, it lacks in art." A total of 162,099 Lexington-Concord Sesquicentennial half dollars were struck at the Philadelphia Mint in April and May, 1925, with 99 pieces set aside for inspection and testing by the 1926 Assay Commission. The coins were made from blanks, or planchets, that had been intended for mintage into 1924 Stone Mountain Memorial half dollars, but had not been used. The first coin struck was presented to President Coolidge. The half dollars were sold at the
Sheet metal forming simulation address a tearing problem in a metal stamping operation. A simple simulation model was created to determine the effect of blank edge radius on the height to which the material could be formed without tearing. Based on this information a new die was designed that solved the problem. There are lots of sheet metal programs available in the industry as SolidWorks and LITIO. Sheet metal forming simulation Today the metal forming industry is making increasing use of simulation to evaluate the performing of dies, processes and blanks prior to building try-out tooling. Finite element analysis (FEA) is the most common