Abstract
This paper describes an interactive computer programme, implemented on a 64K mini-computer, a size which is within the purchasing capability of most drop forges, to aid the process of preparing data for cost estimation and preform die design for forging on hammers. The programme utilises Interactive -MODCON [1], a CAM system developed for machining finish forging dies, as an input facility to describe the geometry of forged shapes. Provided with an input file describing the geometry of the forging, the programme can be executed to obtain data such as the weight, cross sectional areas, plan area, mean thickness, centre of gravity, perimeter of the forged shape. Based upon these data, essential information required for cost estimation and preform die design is provided using the built-in design rules. The information includes amount of flash, flash geometry, mass distribution curve, forging energy and load, hammer size, minimum preform operations and bar size.
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