A Scanning Method for Selective Laser Sintering

A technology of laser sintering and scanning method, applied in the field of laser scanning, can solve the problems of very high matching requirements of scanning speed and laser power, reducing the accuracy of parts, uneven laser intensity, etc., to achieve uniform laser scanning intensity and ensure product quality. , the effect of the same scanning speed

A technology of laser sintering and scanning method, applied in the field of laser scanning, can solve the problems of very high matching requirements of scanning speed and laser power, reducing the accuracy of parts, uneven laser intensity, etc., to achieve uniform laser scanning intensity and ensure product quality. , the effect of the same scanning speed

CN102172774BActive Publication Date: 2015-09-30HUNAN FARSOON HIGH TECH CO LTD
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  • A Scanning Method for Selective Laser Sintering
  • A Scanning Method for Selective Laser Sintering

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Embodiment

[0011] The equipment that the inventive method adopts is as figure 1 As shown, in the SLS equipment, the powder feeding device 9 sends a certain amount of powder to the worktable, and after the powder is preheated, the powder spreading roller 7 evenly spreads the powder on the upper surface of the molded part 11 in the working cylinder 8 , the excess powder is recovered to the overflow powder cylinder 10, the heating device 6 heats the laid powder to a temperature just below the sintering point of the powder, the laser beam 5 emitted from the laser 1 is reflected by the prism 2 to the vibrating mirror system 3, and vibrates The mirror system 3 controls the laser beam 5 to pass through the laser window 4 to the working table for filling and scanning sintering of the cross-section powder of the workpiece 11 . Such as figure 2 As shown, a is the sharp corner of the laser scanning, the laser scans along the B side at a constant speed to the vertex A with the speed v and power w,...

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Abstract

The invention discloses a selective laser sintering scanning method. When a sharp corner is met in a selective laser sintering process, a sealed curved-form empty jump is adopted to change the scanning direction, and the scanning speeds at the front and back of the corner are guaranteed to be consistent, thus uniform laser scanning intensity and scanning accuracy of the sharp corner are guaranteed.

Description

technical field [0001] The invention relates to a laser scanning method used in the selective laser sintering process, in particular to a laser scanning method for sharp corners in the selective laser sintering process. Background technique [0002] Rapid Prototyping (RP) is an advanced manufacturing technology with distinctive features such as digital manufacturing, high flexibility and adaptability, direct CAD model drive, fast speed, and rich and diverse material types. Since the late 1980s, So far, it has become a pillar technology in modern advanced manufacturing technology. Selective Laser Sintering (SLS) is one of the fastest-growing rapid prototyping technologies in recent years. It uses powder materials as raw materials and uses laser to scan the cross-section of a three-dimensional entity layer by layer to complete prototype manufacturing. The complexity of the shape is limited, no tooling and molds are required, and the application range is wide. The basic proce...

Claims

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Application Information

Patent Timeline
30 Sep 2015
Publication
CN102172774B
IPC
B22F3/105
CPC
Y02P10/25
Inventors
许小曙