B - Operations – Transporting – 21 – D
Patent
B - Operations, Transporting
21
D
B21D 28/16 (2006.01) B21D 53/28 (2006.01) B21D 53/88 (2006.01) B21J 5/06 (2006.01) B21K 1/30 (2006.01) B21K 7/12 (2006.01)
Patent
CA 2569180
The invention relates to a method and tool for the production of three-dimensional attachments out of a flat strip by forming and fine blanking operations, especially for car seat components or the like, wherein the flat strip is fed into a tool, in the tool out of the flat strip is stamped at least one plate, the plate is processed into an attachment in multiple processing steps, at first by fine blanking, in a following second step the developed burrs are flattened and then without finishing the attachment is removed from the tool ready for mounting. The invention has the object to improve a method and a tool for producing attachments with complex geometry by combined fine blanking and forming operations in such a way, that mountable and burr-free parts with very small tolerances, high accuracy and process safety can be provided at effective costs. This object is solved by simultaneous forming and fine blanking of the plate in the first process stage, wherein the plate is completely cut out of the flat strip and the position, form and location of the inner form created by the forming during the complete cutting out is aligned to the outer contour of the plate, and in the second stage, by centering the plate before flattening the burr, which developed during fine blanking at the outer and inner contours, according to its outer contour (AK) and simultaneously orienting the plate according to location and form of the shape of the inner form (IK) created in the plate in such a way, that the burr at the fine blanked surfaces can be flattened directly in the tool.
Feintool Intellectual Property Ag
Riches Mckenzie & Herbert Llp
LandOfFree
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