Apparatus, method, and computer program product for fusing a workpiece
First Claim
1. A computer program product for forming a three-dimensional article through successively depositing individual layers of powder material that are fused together so as to form the article, the computer program product comprising at least one non-transitory computer-readable storage medium having computer-readable program code portions stored therein, the computer-readable program code portions comprising one more executable portions configured to:
- manipulate at least one high energy beam source for emitting a high energy beam for at least one of heating or fusing said powder material;
manipulate a focus lens for focusing said high energy beam on said powder material so as to form a high energy beam spot on a workpiece; and
shape the high energy beam spot on said powder layer via at least one astigmatism lens so that the shape of the high energy beam spot on said layer of powder is longer in a direction parallel to a deflection direction of said high energy beam than in a direction perpendicular to said deflection direction of said high energy beam,wherein;
a ratio of a length of said high energy beam spot in said parallel direction and a width of said high energy beam spot in said perpendicular direction is varying as a function of the power of said energy beam on said workpiece either during a scan of said high energy beam on said powder material or between successive scans of said high energy beam on said powder material; and
the width of said high energy beam spot in said perpendicular direction is a constant value.
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Accused Products
Abstract
Various embodiments of the present invention relate to a method for welding a workpiece comprising the steps of: making a first weld at a first position on said workpiece with a high energy beam, deflecting the high energy beam with at least one deflection lens for making a second weld at a second position on said workpiece, focusing the high energy beam on said workpiece with at least one focusing lens, shaping the high energy beam on said workpiece with at least one astigmatism lens so that the shape of the high energy beam on said workpiece is longer in a direction parallel to a deflection direction of said high energy beam than in a direction perpendicular to said deflection direction of said high energy beam. The invention is also related to the use of an astigmatism lens and to a method for forming a three dimensional article.
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Citations
8 Claims
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1. A computer program product for forming a three-dimensional article through successively depositing individual layers of powder material that are fused together so as to form the article, the computer program product comprising at least one non-transitory computer-readable storage medium having computer-readable program code portions stored therein, the computer-readable program code portions comprising one more executable portions configured to:
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manipulate at least one high energy beam source for emitting a high energy beam for at least one of heating or fusing said powder material; manipulate a focus lens for focusing said high energy beam on said powder material so as to form a high energy beam spot on a workpiece; and shape the high energy beam spot on said powder layer via at least one astigmatism lens so that the shape of the high energy beam spot on said layer of powder is longer in a direction parallel to a deflection direction of said high energy beam than in a direction perpendicular to said deflection direction of said high energy beam, wherein; a ratio of a length of said high energy beam spot in said parallel direction and a width of said high energy beam spot in said perpendicular direction is varying as a function of the power of said energy beam on said workpiece either during a scan of said high energy beam on said powder material or between successive scans of said high energy beam on said powder material; and the width of said high energy beam spot in said perpendicular direction is a constant value. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification