US 7,647,698 B2Granted

Method and device for producing a cutting or embossing roller by means of laser resurfacing welding

AssigneeWinkler & Dunnebier

InventorMichael Closmann

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Abstract

A method for producing a cutting or embossing roller having a cutting knife or embossing projection that projects out of the surface of a base body of the roller ensures the greatest possible optimal homogeneity of the cutting knife or the embossing projection, while minimizing production duration and costs. Single-layer or multi-layer application of the cutting knife or the embossing projection onto the roller base body occurs by laser resurfacing welding. Each layer is produced using an additional powdered material, which is melted in a melt bath at the weld point. The heat and/or light radiation emitted by the melt bath is detected, at least during application of each layer. Laser power is controlled or regulated as a function of the heat and/or light radiation emitted by the melt bath, so that melt bath temperature remains essentially constant during application of each layer.

Claims9

Dependent claims

A method for producing a cutting or embossing roller having a cutting knife or embossing projection that projects out of a surface of a base body of the roller comprising the following steps:

(a) applying by laser resurfacing welding at least one layer of the cutting knife or the embossing projection onto the base body of the roller, each layer of the at least one layer being produced using an added material in powder form melted in a melt bath at a weld point;
(b) detecting heat or light radiation emitted by the melt bath at least during application of each layer;
(c) controlling or regulating power of a laser used in the laser resurfacing welding as a function of the heat or light radiation emitted by the melt bath so that melt bath temperature remains substantially constant during application of each layer;
and
(d) setting a wavelength of a laser beam emitted by the laser as a function of an absorption capacity of powder particles that form the added material in powder form.

2 more elements

Dependencies are inferred from the claim text.

Facts

Application: 11/215,324Filed 30 Aug 2005
Priority: DE 10 2004 042 49231 Aug 2004
Published: US 2006/0042436 A12 Mar 2006
Granted: 19 Jan 2010
Term ends: Not estimatedThe source records don’t support an estimate.

Classification50 codes

B23P 15/406
Shearing tools: rotary or plane die cutters
B22F 10/25
Direct sintering or melting: direct deposition of metal particles, e.g. direct metal deposition [DMD] or laser engineered net shaping [LENS]
B22F 10/368
Of energy beam parameters: temperature or temperature gradient, e.g. temperature of the melt pool
B22F 12/222
Driving means: for motion along a direction orthogonal to the plane of a layer