Use of Three-Dimensional Body Motion to Free-Form Surface Design

To deal with the lack of accurate and efficient inspection methods in complex free-form surfaces, three-dimensional measurement method based on the optical measurement and computer image processing technology was proposed. It adopted laser scanning technology to get point clouds of free-form surface. Used rapid measurement software to inspect precision of point cloud& CAD model. What could be the cause of machining errors was analyzed. 3D deviation inspection of complex surfaces was applied by an artifact. Detected the machining error of an important section, and outputted test report. This research provides a convenient and swift method for the inspection of free-form surface and processing quality control.

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Increasing the Accuracy of Free-Form Surface Multiaxis Milling

Materials ◽

10.3390/ma14010025 ◽

2020 ◽

Vol 14 (1) ◽

pp. 25

Author(s):

Marek Sadílek ◽

Zdeněk Poruba ◽

Lenka Čepová ◽

Michal Šajgalík

Keyword(s):

Computer Aided Design ◽

Three Dimensional ◽

Machining Process ◽

Free Form ◽

Machining Accuracy ◽

Tool Axis ◽

Computer Aided ◽

Milled Surface ◽

Inclination Angles ◽

Free Form Surface

This contribution deals with the accuracy of machining during free-form surface milling using various technologies. The contribution analyzes the accuracy and surface roughness of machined experimental samples using 3-axis, 3 + 2-axis, and 5-axis milling. Experimentation is focusing on the tool axis inclination angle—it is the position of the tool axis relative to the workpiece. When comparing machining accuracy during 3-axis, 3 + 2-axis, and 5-axis milling the highest accuracy (deviation ranging from 0 to 17 μm) was achieved with 5-axis simultaneous milling (inclination angles βf = 10 to 15°, βn = 10 to 15°). This contribution is also enriched by comparing a CAD (Computer Aided Design) model with the prediction of milled surface errors in the CAM (Computer Aided Manufacturing) system. This allows us to determine the size of the deviations of the calculated surfaces before the machining process. This prediction is analyzed with real measured deviations on a shaped surface—using optical three-dimensional microscope Alicona Infinite Focus G5.

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LFC Mold Development of Complex Parts with Free-Form Surface

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.228-229.532 ◽

2011 ◽

Vol 228-229 ◽

pp. 532-536

Author(s):

Xiao Feng Xiao ◽

Qiong Xue ◽

Ke Feng Xiao ◽

Xiao Lan Hu

Keyword(s):

Three Dimensional ◽

Free Form ◽

Pattern Design ◽

Three Dimensional Modeling ◽

Key Points ◽

Cad Cam ◽

Cnc Programming ◽

Free Form Surface ◽

Key Techniques ◽

Lost Foam

This paper has analyzed key techniques in foam mold development for Lost Foam Casting for different types of casting, which are complex box, pipe faucet junction ,wear-resisting and refractory alloy steel casting, Focused on complex castings with free-form surface, key points during whole technical route, which includes three-dimensional modeling, foamed pattern design, mold design and CNC program, have been discussed by utilizing modeling & manufacturing module on Unigraphics. Because of its perfect free-form surface functions and plentiful toolpath operations in CNC programming, Foam mold of complex casting with free-form surface has been designed, manufactured and assembled successfully for LFC, Qualified foamed pattern of vortical shell has been produced successfully. Several effective methods and experiences have been achieved by utilizing CAD/CAM technology.

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