Method and device for forming a corner limited on three sides, from a plate-shaped material with an even surface
Assignee“ACF” Engineering & Automation GmbH
InventorMarkus Hametner
Life of this patent
Estimating the term…
Abstract
The invention relates to a method and a device for forming a corner bounded on three sides from a flat plate part, in particular sheet metal, whereby the side edges adjacent to the corner are folded back across a major part of their longitudinal extension parallel with the flat plate part and shaped on a curved path in the region in which the corner is to be formed from the folded-back side edge to the plane of the flat plate part. The pre-formed blank is then pressed at the curved transition region by means of at least one roller system (42), spanning the corner region (10) between the side edges, against a tool (16) and the corner shaped by forming the material and optionally trimmed in a cutting device.
Claims14
A method of forming a corner region bounded on three sides from a flat plate having side edges having longitudinal extensions, comprising the steps of
- (a) folding down the side edges of the flat plate by a predetermined height from the plane of the flat plate and across at least a major part of the longitudinal extensions to form side walls in the corner region in a three-dimensional curved transition region,
- (b) clamping the transition region between a tool having a predeterminable, three-dimensional external shape, of the corner to be formed and a height-adjustable clamping plate pressed against the flat plate,
- (1) the external shape of the tool being comprised of shaping surfaces having a height same as or slightly larger than a height of the side walls plus a height of an excess projection in the corner region and to be trimmed, the clamping plate having front edges cooperating with the shaping surfaces of the tool forming the corner region,
- (2) Positioning the front edges flush with the shaping surfaces of the tool or protecting therefrom by a distance slightly smaller than the thickness of the side walls,
- (c) shaping the transition region by means of at least one roller system overlapping the corner region between the side walls by pressing in the curved transition region against the tool.
A device for forming a corner region bounded on three sides from a flat plate having a top face and side walls folded down from side edges of the flat plate by a predetermined height and across at least a major part of the longitudinal extension, which comprises
- (a) a roller system, for forming the corner region in a three-dimensional shape,
- (b) a tool having a predeterminable, three-dimensional external shape,
- (1) the external shape of the tool being comprised of a top face and shaping surfaces having a height corresponding to the predetermined height of the side walls plus a height of an excess projection extending from the side walls and to be trimmed, and
- (c) a clamping device displaceable in a direction substantially perpendicular to the top face of the tool for clamping the flat plate to the top face of the tool, the clamping plate having front edges cooperating with the shaping surfaces of the tool forming the corner region, and
- (1) the front edges being flush with the shaping surfaces of the tool or projecting therefrom by a distance slightly smaller than the thickness of the side walls.
Dependencies are inferred from the claim text.