Triangle hatch pattern for additive manufacturing

Abstract

A scanning technique for the additive manufacturing of an object. The method comprises the irradiation of a portion of a given layer of powder to form a fused region using an energy source. When forming an object layer by layer, the irradiation follows a first irradiation path bounded by a first stripe, wherein the first irradiation path is formed at an oblique angle with respect to the first stripe. The first irradiation path further comprises at least a first scan vector and a second scan vector at least partially melting a powder and forming a first solidification line and second solidification line respectively, wherein the first solidification intersects and forms an oblique angle with respect to the second solidification line. After a layer is completed, a subsequent layer of powder is provided over the completed layer, and the subsequent layer of powder is irradiated. Irradiation of the subsequent layer of powder follows a second irradiation path bounded by a second stripe. wherein the second irradiation path is formed at an oblique angle with respect to the second stripe. The first irradiation path further comprises at least a third scan vector and a fourth scan vector at least partially melting a powder and forming a third solidification line and fourth solidification line respectively, wherein the third solidification intersects and forms an oblique angle with respect to the fourth solidification line

What is claimed is: 
     
         1 . A system comprising an additive manufacturing device for irradiating a powder, a monitoring device, a computer, and software integrated together to adjust irradiation settings in the additive manufacturing device, wherein the system:
 irradiates a portion of a layer of powder to form a fused region, wherein the irradiation follows a first irradiation path within a stripe region bounded by a first stripe boundary and a second stripe boundary, the first irradiation path further comprises:   forming a first solidification and an intersecting second solidification line at first oblique angle with respect to the first solidification line, wherein the first solidification line is formed at an angle other than 90° with respect to the first stripe.   
     
     
         2 . The system of  claim 1 , wherein a subsequent layer of powder is provided over the fused region, and the subsequent layer of powder is irradiated, wherein irradiation of the subsequent layer of powder follows a second irradiation path within a second stripe region bounded by at least a first stripe boundary wherein the second irradiation path further comprises:
 forming a third solidification line and an intersecting fourth solidification line at a second oblique angle with respect to the third solidification line, wherein the third solidification line is formed at an angle other than 90° with respect to the second stripe boundary.   
     
     
         3 . The system of  claim 1 , wherein the system irradiates the powder using a laser. 
     
     
         4 . The system of  claim 1 , wherein the system irradiates the powder using an electron-beam. 
     
     
         5 . The system of  claim 1 , wherein an energy source is turned off over the skywriting path. 
     
     
         6 . The system of  claim 1 , wherein an energy source is defocused over the skywriting path.