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Based on the temperature field strength of Selective Laser Sintering change research

Author: ZhouZiYu
Tutor: DongXingTao
School: Zhejiang University of Technology
Course: Mechanical Manufacturing and Automation
Keywords: Selective Laser Sintering Preheating temperature Variable intensity Heat
CLC: TF124.5
Type: Master's thesis
Year: 2010
Downloads: 45
Quote: 1
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Abstract


Selective Laser Sintering (SLS) technology is a powder material for the processing of objects in rapid prototyping technology . Selective laser sintering process, the powder is sintered preheat temperature is an important performance factor. Preheating the powder bed surface temperature variations , there is a big difference in the performance parts . In this paper the surface of the powder bed preheat temperature field based on the study , further study of three-dimensional preheat temperature field , the use of preheating temperature is uneven, pink bed machined surface by adding the following heat to change the preheat temperature field, thus changing the part strength . Preheat the regions in which parts of uneven temperature field , resulting in different parts of the region 's strength by adding a suitable heat source , with a purpose to change the preheating temperature , the nature of manufactured parts with variable intensity . Extends the selective laser sintering technology applications , with some innovative . ( A ) first introduced the rapid prototyping technology and its research status, analysis of the molding process and its influencing factors , that in certain circumstances, other parameters , parts strength depends on the preheating temperature , and thus on the preheating temperature were studied . ( 2 ) analysis of the SLS and preheating heat preheating process analysis of the preheating means and the powder bed in the heat radiation characteristics and the heat radiation ANSYS approach. Establishment of the steady state of the powder bed preheating heat physical model . ( 3 ) In the preheating heat transfer model has been established based on the powder bed surface preheat steady heat transfer finite element analysis , has been simulated powder bed surface preheat temperature field . On this basis, further study simulated three-dimensional preheat temperature field . Found an increase in the powder bed at the bottom of the heat source can significantly change the surface preheat temperature distribution , thus changing the part strength . ( 4 ) with finite element analysis , on the basis of the test is established preheating temperature , density, strength of the relationship between the three ; variable strength tests conducted by the addition of heat, to meet the strength of the specimen needs to change .

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CLC: > Industrial Technology > Metallurgical Industry > Metallurgical Technology > Powder metallurgy (metal ceramic technology ) > Powder molding, sintering and post-processing > Sintering process
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