According to empirical parameters, when the wall thickness of impeller investment casting sand casting is > 40 mm, the minimum […]
Because the investment mold of impeller blade is fixed with rosin wax based mold material and sodium silicate sand sleeve,
The quality of investment casting directly affects the geometry, dimensional accuracy and surface roughness of investment casting impeller. When investment
The combination of 3D printing technology and traditional casting industry has brought new vitality to the future casting industry. The
Through zgsccan three-dimensional laser scanner to complete the detection of point cloud data, the obtained point cloud data of complex
The process of PS rapid investment casting based on selective laser sintering was studied. Starting from the process of rapid
Before the 3D scanning data detection, the laser 3D scanner needs to be calibrated. The calibration plate is scanned and
Through the actual observation of the casting, it is found that the appearance of the diffuser casting is complete, and
The blade of diffuser impeller is mainly a complex free-form surface. The conventional measurement method can not complete the mapping
From the actual casting results of trial casting, it can be found that the upper part of the diffuser blade
To detect the 3D data of the part, the specific process is to detect the surface geometry of the part
The diffuser shell adopts high strength ceramic shell process, which is composed of surface layer, transition layer and back layer.
SLS rapid investment casting generally needs three steps: SLS prototype firing, wax impregnation post-treatment and investment casting. Because there is
Through the analysis of the research status at home and abroad, combined with the existing experimental research, and finally according
ProCAST simulation software was used to simulate the gating system, and the temperature field changes and casting defects during filling
In the process of rapid investment casting, due to the different rapid prototyping process, the corresponding casting process scheme is
UG software is used to save the designed initial gating system file in x-t format and import it into the
SLS sintering process and material types have a great influence on the sintering results. Most scholars study the influence of
Mainly through the trial production of rapid investment casting process, including: gating system design; casting simulation pretreatment settings; numerical simulation
With the continuous rise and popularization of 3D technology, China’s manufacturing industry has gradually achieved upgrading, especially in the mold
The size correction of the typical complex diffuser was completed by using magic software. Through the analysis of the size
Combined with the rule of dimension error transfer from CAD model to one-time wax impregnation, the dimension shrinkage in X
Traditional investment casting is also known as “wax loss casting”. Because of the high dimensional accuracy and surface quality of
Based on the rule of dimensional error transfer and reverse engineering, the 3D digital scanning of complex parts after one
In view of the influence of different post-treatment on the surface quality of the specimen, considering the low surface strength
In the experiment, the dimension deviation is used as the measurement index of the dimension accuracy of the specimen. The
For the SLS fired specimens, the specific dimensions are shown in Figure 1. The size of the sample for selective
The process parameters of SLS were predicted as follows: temperature 95 ℃, laser power 30W, powder layer thickness 0.14mm, scanning
As for specimen selection, Wang Danni of Wuhan University of science and technology used finite element analysis and BP neural
Because the sintered materials are mainly thermoplastic polymer materials and their composites, under the action of laser, the powder absorbs
