What are the most important considerations in assuring problem-free post-casting machining (secondary machining) of a die cast part?
A. Any and all post-casting machining that will be required for a die cast part, to achieve specifications not feasible as-cast, must be made clear to the die caster well before the die design stage, and preferably during early product planning. When post-casting machining is to be performed, the die caster must plan for a die design that assures the proper casting density in the areas where machining will take place. Changes in machining locations after die construction can make certain machining operations impossible, based on the fact that the optimum mechanical properties and density of a die casting cross-section are rarely constant. Recommended machining stock allowances for the guidance of product designer are outlines in the Coordinate Dimensioning section of the NADCA Product Standards Manual (See description & Discount Order Form).
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