Deep Drawing Tool and Deep Drawing Process for Deep Drawing Blanks
AssigneeRainer Naroska Engineering GmbH
InventorMarcus Naroska
Life of this patent
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Abstract
A deep-drawing tool for deep drawing blanks which are punched out of sheet material that is painted or coated with film material, in order to obtain flangeless molded blanks, includes a drawing bell, a drawing core, a blank holder, a force transmission device, a drawing cushion for applying a spring force to the blank holder by the force transmission device, and a drive which, after the drawing bell reaches a predetermined position in downward movement thereof, drives the force transmission device to perform a movement which precedes movement of the drawing bell.
Claims14
Deep-drawing tool for deep drawing blanks which are punched out of sheet material that is painted or coated with film material, in order to obtain flangeless molded blanks, comprising:
- a drawing bell,
- a drawing core,
- a blank holder,
- a force transmission device,
- a drawing cushion for applying a spring force to the blank holder by the force transmission device, and
- a drive which, after the drawing bell reaches a predetermined position in downward movement thereof, drives the force transmission device to perform a movement which precedes movement of the drawing bell.
Method for deep drawing blanks which are punched from sheet metal that is painted or coated with film material, to obtain flangeless molded pieces, comprising the steps of:
- shaping a blank by a drawing bell of a drawing tool around a drawing core to create a pot-shaped part with a flangeless cylindrical edge,
- during molding of an edge of the blanks, applying a spring force with the help of a blank holder to a side of the edge furthest from the drawing bell by a drawing cushion by a force transmission device,
- when the drawing bell reaches a predetermined position in downward movement thereof, driving the force transmission device to perform a movement which precedes movement of the drawing bell.
Dependencies are inferred from the claim text.