| 摘要 |
A stretch-forming tool to provide a variable tool contour for the stretch-wrap forming and joggling of extrusions of aluminum, or the like, to any of a variety of different contours. The present tool comprises a base plate in which a plurality of elongated slots of variable length are cut. An array of position variable form blocks are respectively connected to the base plate at the slots formed therein. Each of the form blocks is adapted to ride through a respective slot to assume a particular position, relative to other form blocks of the array, whereby to define a desired net contour. The form blocks are particularly aligned relative to one another by means of a template. The template is shaped so as to correspond to the configuration of the final production part, either precisely or approximately, depending on whether compensation for springback is to be included. A workpiece is stretched around the array of form blocks until permanent deformation occurs therein at a desired contour, depending upon the alignment of the form blocks on the base plate.
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