Method for marking workpieces and workpiece
AssigneeFraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.
InventorsChristoph Zeh, Thomas Härtling
Life of this patent
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Abstract
In an embodiment, the method includes providing a blank, applying a marking to the blank in places and heating the blank with the marking to a deformation temperature. The method further includes deforming the blank to form the workpiece and cooling the workpiece, wherein deforming is a hot forming, wherein the marking remains at the workpiece at least until after deforming and cooling, and is not destroyed by deforming, and wherein the marking has a difference in the degree of reflection and/or a difference in the degree of reflectance and/or a difference in albedo of at least 15 percentage points in at least part of the near ultraviolet, visible and/or near infrared spectral range both with respect to the blank and with respect to the workpiece.
Claims17
A method for manufacturing a workpiece, the method comprising:
- providing a blank;
- applying a marking to the blank in places;
- heating the blank with the marking to a deformation temperature;
- and
- after heating, deforming the blank to form the workpiece and cooling the workpiece,
- wherein deforming is a hot forming,
- wherein the marking remains on the workpiece at least until deforming and cooling, wherein the marking is not destroyed by deforming,
- wherein the marking has a difference in the degree of reflection and/or a difference in the degree of reflectance and/or a difference in albedo of at least 15 percentage points in at least part of a near ultraviolet, visible and/or near infrared spectral range both with respect to the blank and with respect to the workpiece,
- wherein the marking is applied by at least one phosphor or comprises at least one phosphor which brings about the difference in a degree of reflection,
- wherein the blank comprises an anti-scaling protective layer to which the marking is directly applied,
- wherein a melting point of the marking is at least 25° C. above a melting point of the anti-scaling protective layer and both melting points are below the deformation temperature,
- wherein the marking or at least one constituent of the marking is pressed into the anti-scaling protective layer while heating and cooling, and
- wherein the marking differs from the blank and from the workpiece machine-readably at least in a visible spectral range.
A method for manufacturing a workpiece, the method comprising:
- providing a blank;
- applying a marking to the blank in places;
- heating the blank with the marking to a deformation temperature;
- after heating, deforming the blank to form the workpiece and cooling the workpiece,
- wherein deforming is a hot forming,
- wherein the marking remains on the workpiece at least until deforming and cooling, wherein the marking is not destroyed by deforming, and
- wherein the marking has a difference in the degree of reflection and/or a difference in the degree of reflectance and/or a difference in albedo of at least 15 percentage points in at least part of a near ultraviolet, visible and/or near infrared spectral range both with respect to the blank and with respect to the workpiece;
- and
- after deforming and cooling, removing the marking in a dry process after step, wherein a material of the workpiece is not removed.
A method for manufacturing a workpiece, the method comprising:
- providing a blank;
- applying a marking to the blank in places;
- heating the blank with the marking to a deformation temperature;
- and
- after heating, deforming the blank to form the workpiece and cooling the workpiece,
- wherein deforming is a hot forming,
- wherein the marking remains on the workpiece at least until deforming and cooling, wherein the marking is not destroyed by deforming,
- wherein the marking has a difference in the degree of reflection and/or a difference in the degree of reflectance and/or a difference in albedo of at least 15 percentage points in at least part of a near ultraviolet, visible and/or near infrared spectral range both with respect to the blank and with respect to the workpiece,
- wherein the blank comprises an anti-scaling protective layer to which the marking is directly applied, and
- wherein the marking or at least one constituent of the marking is pressed into the anti-scaling protective layer while heating and cooling.
Dependencies are inferred from the claim text.