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US 6,308,545 B2Granted
Method and apparatus for forming blanks
AssigneeKuka Werkzeugbau Schwarzenberg GmbH
InventorsLonka B{overscore (u)}rgel, Frank Schieck
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Abstract
For shaping small radii in edge and corner regions of preformed workpieces or blanks, the invention provides for a postforming of exclusively said edge and corner regions by high liquid pressure. For performing the method an apparatus has a die part (forming insert) with expansion spaces constructed in its edge and corner regions.
Claims15
Apparatus for forming blanks, comprising:
- a forming die having a blank receiving cavity including edge and corner regions, and a forming insert for insertion into the cavity, said insert having corresponding edge and corner regions including recessed expansion spaces.
A method for forming blanks, comprising:
- a) providing a forming die having a blank receiving cavity including edge and corner regions;
- b) inserting a blank into said cavity, the blank being preformed to generally the shape of the cavity;
- c) inserting into the cavity a forming insert, said insert having corresponding edge and corner regions including recessed expansion spaces;
- and,
- d) subjecting only the expansion spaces to high pressure liquid pressure, whereby the blank is shaped to more closely follow the edge and corner portions of the cavity.
2 more elements
Dependencies are inferred from the claim text.