摘要：
Some examples include methods of operating an additive manufacturing machine including generating thermal energy with a thermic source including a warming source and a fusing source, each of the warming and fusing sources having a major axis longitudinally extending in a y-axial direction above a build zone, the build zone to contain a build material and a fusing agent, moving the thermic source in a x-axial direction orthogonal to the y-axial direction over the build zone at a constant velocity, delivering a first substantially uniform heat flux from the warming source and a second substantially uniform heat flux from the fusing source to cause portions of the build material that the fusing agent is disposed on to form a layer of a three dimensional object, and continuously generating thermic energy from the thermic source during a build process of the three dimensional object.
技术问题语段：
The patent text describes various methods and systems for 3D printing and additive manufacturing, including using multiple energy sources and selectively combining particulate material. The technical problem addressed in this patent text is how to improve the accuracy and precision of 3D printing while preventing stray light from affecting the workpiece.
技术功效语段：
The patent describes a system for 3D printing objects using a fusing apparatus that applies thermic energy to fuse together powdered build material. The system includes a build chamber, a carriage, and a thermic source. The thermic source has a warming source and a fusing source, which help control the heating and fusing of the build material. The system can produce objects with improved accuracy and efficiency.
权利要求：
1. A method of operating an additive manufacturing machine, comprising: generating thermal energy with a thermic source including a warming source and a fusing source, each of the warming and fusing sources having a major axis longitudinally extending in a y-axial direction above a build zone, the build zone to contain a build material and a fusing agent; moving the thermic source in a x-axial direction orthogonal to the y-axial direction over the build zone at a constant velocity; delivering a first substantially uniform heat flux from the warming source and a second substantially uniform heat flux from the fusing source to cause portions of the build material that the fusing agent is disposed on to form a layer of a three dimensional object, wherein delivering the first and second substantially uniform heat fluxes comprises: emitting a non-uniform heat flux along the major axis of each of the warming and fusing sources, and modifying, with a flux modifier, a portion of the non-uniform heat flux along the major axis of each of the warming and fusing sources, to deliver the first and second substantially uniform heat fluxes to the build material during the build process; and continuously generating thermic energy from the thermic source during a build process of the three dimensional object.
2. The method of claim 1, wherein the flux modifier comprises at least one of a reflector, a field stop, a lens, a reflective filter, and an absorptive filter.
3. A method of operating an additive manufacturing machine, comprising: generating thermal energy with a thermic source including a warming source and a fusing source, each of the warming and fusing sources having a major axis longitudinally extending in a y-axial direction above a build zone, the build zone to contain a build material and a fusing agent, wherein each of the warming and fusing sources includes quartz infrared halogen lamps, each of the quartz infrared halogen lamps having a segmented filament having a first coil density at opposing end sections and a second coil density at a central section extending between the opposing end sections, the first coil density is greater than the second coil density; moving the thermic source in a x-axial direction orthogonal to the y-axial direction over the build zone at a constant velocity; delivering a first substantially uniform heat flux from the warming source and a second substantially uniform heat flux from the fusing source to cause portions of the build material that the fusing agent is disposed on to form a layer of a three dimensional object; and continuously generating thermic energy from the thermic source during a build process of the three dimensional object.
4. The method of claim 1 or claim 3, wherein the warming source is to warm the build material in locations that the fusing agent is absent and fusing source is to heat the portions of the build material in locations that the fusing agent is disposed on to cause build material fusing.
5. A fusing apparatus (10) for an additive manufacturing machine, comprising: a carriage (14) to be moved across a build chamber (12) bi-directionally along an x-axis at a uniform velocity in each direction during a build process; and a thermic source (16) mounted to the carriage, the thermic source movable with the carriage in the x-axial direction, the thermic source comprising a warming source (24) and a fusing source (26), the fusing source including a series of non-uniform heat sources each extending longitudinally in a y-axial direction orthogonal to the x-axis forming a substantially uniform heat flux density in the y-axial direction; wherein the thermic source is a quartz infrared halogen lamp, and wherein the quartz infrared halogen lamp includes a segmented filament having a first coil density at opposing end sections and a second coil density at a central section extending between the opposing end sections, the first coil density is greater than the second coil density.
6. A fusing apparatus (10) for an additive manufacturing machine, comprising: a carriage (14) to be moved across a build chamber (12) bi-directionally along an x-axis at a uniform velocity in each direction during a build process; a thermic source (16) mounted to the carriage, the thermic source movable with the carriage in the x-axial direction, the thermic source comprising a warming source (24) and a fusing source (26), the fusing source including a series of non-uniform heat sources each extending longitudinally in a y-axial direction orthogonal to the x-axis forming a substantially uniform heat flux density in the y-axial direction; and a flux modifier (32) to modify a portion of a heat flux emitted, along the y-axial direction, from the series of non-uniform heat sources into the substantially uniform heat flux density.
7. The fusing apparatus (10) of claim 6, wherein the flux modifier comprises: at least one of a reflector, a field stop, a lens, a reflective filter, and an absorptive filter to modify the portion of the heat flux emitted from the series of non-uniform heat sources into the substantially uniform heat flux density.