Genetic Algorithm Modelling and Solution of Inspection Path Planning on a Coordinate Measuring Machine (CMM)

1999 ◽  
Vol 15 (6) ◽  
pp. 409-416 ◽  
Author(s):  
C. G. Lu ◽  
D. Morton ◽  
M. H. Wu ◽  
P. Myler
Keyword(s):  
Genetic Algorithm ◽  
Path Planning ◽  
Coordinate Measuring Machine ◽  
Measuring Machine

Automatic Coordinate Measuring Machine Inspection

1999 ◽  
Author(s):  
V. A. Albuquerque ◽  
F. W. Liou ◽  
S. Agarwal ◽  
O. R. Mitchell
Keyword(s):  
Path Planning ◽  
Computer Aided Design ◽  
Coordinate Measuring Machine ◽  
Industrial Applications ◽  
Prototype Development ◽  
Development Cycle ◽  
Inspection Process ◽  
Measuring Machine ◽  
Aided Design ◽  
Point Placement

Abstract In many industrial applications, such as product prototype development, automation of inspection process can greatly improve product quality and product development cycle, time. This paper discusses a development of a vision aided automatic inspection using Coordinate Measuring Machine (CMM). We seek to integrate the flexibility afforded by computer vision systems with the precision of numerically controlled coordinate measuring machines to achieve a fully automatic and reliable inspection of the industrial parts. The 3-D design information and part specification from computer-aided design file is used for inspection point placement and CMM path planning. The proposed system demonstrates that optimal collision-free inspection paths can be efficiently generated for geometrically complex parts consisting of multiply intersecting features. This is made possible by using iterative subdivision of surfaces for point placement coupled with, efficient 3-D collision avoidance and path planning. The paper discusses different algorithms used, and presents experimental results.

A New Method of CMM Inspect Path Planning for Precision Generalized Helicoid

2010 ◽  
Vol 455 ◽  
pp. 458-461
Author(s):  
Wei Min Pan ◽  
Yong Jian Yu ◽  
J.S. Li ◽  
F. Xu
Keyword(s):  
Path Planning ◽  
Aerial Part ◽  
Power Transmission ◽  
Coordinate Measuring Machine ◽  
Measuring Method ◽  
New Method ◽  
Measuring Process ◽  
Measuring Machine

The helical surfaces are widely applied to both power transmission and fluid compression or pumping. Helicoid is measured by digitized measurement with the coordinate measuring machine (CMM) in this paper. A numerical measuring method which is different from traditional measuring method for Helicoid is given. The Measuring process is illustrated in detail. At the same time, this method is proved effectiveness through a practical measuring example of an aerial part.

CMM Inspect Path Planning for Precision Convex Revolved Surfaces

2011 ◽  
Vol 383-390 ◽  
pp. 7090-7093
Author(s):  
Wei Min Pan ◽  
Yong Jian Yu ◽  
Wei Ma ◽  
Yong Gang Liu
Keyword(s):  
Path Planning ◽  
Coordinate Measuring Machine ◽  
Measuring Method ◽  
Measuring Process ◽  
Optical Part ◽  
Measuring Machine

The revolved surfaces are widely applied to both optical equipments and aerodynamic domain. The revolved surface is measured by digitized measurement with the coordinate measuring machine (CMM) in this paper. A CMM inspecting path planning which is different from traditional measuring method for revolved surface is given. At the same time, this method is proved effectiveness through a practical measuring example of an optical part. The Measuring process and the measuring results are illustrated in detail.

CMM Inspect Path Planning for Precision Concave Revolved Surfaces

2010 ◽  
Vol 44-47 ◽  
pp. 3869-3873
Author(s):  
Wei Min Pan ◽  
Yong Jian Yu ◽  
Wei Ma ◽  
Yong Gang Liu
Keyword(s):  
Path Planning ◽  
Coordinate Measuring Machine ◽  
Measuring Method ◽  
Measuring Process ◽  
Optical Part ◽  
Measuring Machine ◽  
Automatic Algorithm

The revolved concave surfaces are widely applied to both optical equipments and aerodynamic domain. The revolved surface is measured by digitized measurement with the coordinate measuring machine (CMM) in this paper. A CMM inspecting path planning which is different from traditional measuring method for revolved surface is given. An automatic algorithm of digitization on a CNC coordinate measuring machine for an unknown revolved surface is present. At the same time, this method is proved effectiveness through a practical measuring example of an optical part. The Measuring process and the measuring results are illustrated in detail.

scholarly journals Evaluation of dimensional accuracy of dental bridges manufactured with conventional casting technique and CAD/CAM system with Ceramill Sintron blocks using CMM

2018 ◽  
Vol 12 (4) ◽  
pp. 264-271 ◽  
Author(s):  
Alireza Izadi ◽  
Fariborz Vafaee ◽  
Arash Shishehian ◽  
Ghodratollah Roshanaei ◽  
Behzad Fathi Afkari
Keyword(s):  
Reference Model ◽  
Coordinate Measuring Machine ◽  
Dimensional Accuracy ◽  
Three Dimensions ◽  
Casting Technique ◽  
Dimensional Changes ◽  
Conventional Casting ◽  
Cad Cam ◽  
Milling Method ◽  
Measuring Machine

Background. Recently, non-presintered chromium-cobalt (Cr-Co) blocks with the commercial name of Ceramill Sintron were introduced to the market. However, comprehensive studies on the dimensional accuracy and fit of multi-unit frameworks made of these blocks using the coordinate measuring machine (CMM) are lacking. This study aimed to assess and compare the dimensional changes and fit of conventional casting and milled frameworks using Ceramill Sintron. Methods. A metal model was designed and scanned and 5-unit frameworks were fabricated using two techniques: (I) the conventional casting method (n=20): the wax model was designed, milled in the CAD/CAM machine, flasked and invested; (II) the milling method using Ceramill Sintron blocks (n=20): the wax patterns of group 1 were used; Ceramill Sintron blocks were milled and sintered. Measurements were made on the original reference model and the fabricated frameworks using the CMM in all the three spatial dimensions, and dimensional changes were recorded in a checklist. Data were analyzed with descriptive statistics, and the two groups were compared using one-way ANOVA and Tukey test (α=0.05). Results. The fabricated frameworks in both groups showed significant dimensional changes in all the three dimensions. Comparison of dimensional changes between the two groups revealed no significant differences (P>0.05) except for transverse changes (arch) that were significantly greater in Ceramill Sintron frameworks (P<0.05). Conclusion. The two manufacturing processes were the same regarding dimensional changes and the magnitude of marginal gaps and both processes resulted in significant dimensional changes in frameworks. Ceramill Sintron frameworks showed significantly greater transverse changes than the conventional frameworks.

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