Automatic inspection of turbine blades using a 3-axis CMM together with a 2-axis dividing head

Chang, Hui-Chin; Lin, Alan C.

doi:10.1007/s00170-003-1877-6

Cited by 48 publications

(14 citation statements)

References 8 publications

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“…Finally the measurement path is generated, and the blade profile measurement will be completed. The short blades is generally erectly placed to measure as shown in Figure 2-b, and Figure 2-c shows the measurement of the integral impeller [1]. The shape of the impeller is complex, and the space between two adjacent blades is narrow; even there might be geometric overlapping between the blades.…”

Section: Application In the Turbine Blade Profile Measurementmentioning

confidence: 99%

Overview on the profile measurement of turbine blade and its development

Wang

Gao

2010

SPIE Proceedings

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Turbine machinery has an extraordinary wide range of applications in the aviation, aerospace, automotive, energy and many other industries. The turbine blade is one of the most important parts of turbine machinery, and the characteristic parameters, pressure ratio of the engine and rotating speed of the turbine are all related to the shape and size of blades. Therefore, the profile measurement of turbine blade is an essential issue in the blade machining processing, however, it is difficult and particular to establish the profile measurement of turbine blade because of its complicated shapes and space angles of the blades, and the specific stringent environmental requirements need a more appropriate measurement method to the Turbine Blade profile measurement. This paper reviews the recent research and development on the Turbine Blade profile measurement methods, which mainly describes several common and advanced measurement methods, such as the traditional coordinate measuring machines, some optical measurement methods with the characteristics of non-contact like optical theodolite, three-dimensional photography, laser interferometry, as well as the laser triangulation method studied more recently and so on. Firstly, the measuring principles, the key technical issues and the applications in the Turbine Blade profile measurement of the methods which are mentioned above are described respectively in detail, and the characteristics of those methods are analyzed in this paper. Furthermore, the scope of application and limitations of those measurement methods are summed up. Finally, some views on the current research focus and perspective trend of the Turbine Blade profile measurement technology are presented.

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Section: Application In the Turbine Blade Profile Measurementmentioning

confidence: 99%

Overview on the profile measurement of turbine blade and its development

Wang

Gao

2010

SPIE Proceedings

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“…[1][2][3][4][5][6][7][8][9][10][11] Some of these techniques uses coordinate machine measurements (CMM), 1 which is the most common and reliable measurement method of profile measurement of blades. In order to achieve maximum efficiency some shapes, dimensions and aerodynamic profiles are required for blades so manufacturing process of these parts requires quality inspection techniques.…”

Section: Introductionmentioning

confidence: 99%

“…Several authors describe different techniques that have been implemented for aerodynamic profiles measurements of wind turbine blades. [1][2][3][4][5][6][7][8][9][10][11] Some of these techniques uses coordinate machine measurements (CMM), 1 which is the most common and reliable measurement method of profile measurement of blades. This is the method with the highest measurement accuracy nowadays and has the advantage of completing precision measurement of the profile with complex structure.…”

Section: Introductionmentioning

confidence: 99%

Measurement of quality test of aerodynamic profiles in wind turbine blades using laser triangulation technique

Moreno‐Oliva¹,

Román‐Hernández²,

Dorrego-Portela³

et al. 2019

Energy Science & Engineering

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The development of an optical contact instrument for measuring the geometric shape of aerodynamic profiles on blades of small power wind turbines is presented. The instrument uses the triangulation principle, where a structured line laser pattern is projected onto the surface of one of the faces of the blade under test, a camera captures the image of the line and is processed to interpret the distorted form of the projected line. A linear sweep of the instrument makes it possible to measure the profile in another section of the blade. Comparison and evaluation results of two symmetric profiles of the NACA 0012 family are presented, one manufactured in a 3D printer and the other one is a metal profile AF104 of a subsonic wind tunnel. Additionally, three sections of a blade with profile FX 63‐137 of a 1.5 kW wind turbine were evaluated. An aerodynamic analysis shows a reduction in the lift coefficient and in the efficiency of the aerodynamic profile, as well as an increase in the drag coefficient. The sensitivity of the instrument is 0.1 mm on the Z‐axis.

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“…With the sampled points already specified, another crucial subject is the accessibility analysis [8]- [11], which determines whether the probe tip of the CMM could touch the sample points without any interference between the probe and the CAD model and the follow-up global collision avoidance [12]- [15] when the interference is detected. The solution to the accessibility problem provides feasible stylus orientations for the probe tip to touch the prescribed sampled points.…”

Section: Introductionmentioning

confidence: 99%

Automatic Generation of Five-Axis Continuous Inspection Paths for Free-Form Surfaces

Zhang

Tang

2017

IEEE Trans. Automat. Sci. Eng.

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Continuous five-axis sweep scanning is an emerging technology for free-form surface inspection, which, unlike the traditional three-axis inspection that works in a pointby-point manner, keeps the stylus tip in constant contact with the surface during the scanning, and thus could tremendously improve the inspection efficiency. However, at present, it mostly depends on humans to plan a five-axis inspection path, which severely affects the potential use of this new technology. In this paper, we report a practical algorithm, which is able to automatically generate a five-axis inspection path for an arbitrary free-form surface. The crux of this algorithm is that the unique kinematic characteristics of the five-axis inspection machine are fully considered and utilized when a path is planned. As a direct result of this consideration and utilization, the inspection efficiency is tremendously increased, often 20-30 times better than an inspection path obtained by any traditional path planning algorithm that disregards the inspection machine itself. The experiments performed by us have fully validated this point.Note to Practitioners-This paper was motivated by the current deficiency in the automatic generation of five-axis continuous inspection paths for free-form surfaces. Existing automatic inspection path planning algorithms are mainly designed for the traditional three-axis and three + two-axis point-by-point inspection process, which is time-consuming and unable to be utilized for the much more efficient five-axis continuous inspection because of the drastically different working patterns between them. We present a novel five-axis inspection path generation algorithm that strives to take full advantages of the unique characteristics and the working capacities of the fiveaxis inspection machine, where an inspection path is defined by a trajectory curve of the probe head and the corresponding sweep curve of the stylus tip. Starting with a near-optimum partitioning of the surface, we carefully design oscillating patterns for the sweep curve, while at the same time, try to shorten and smooth the trajectory curve as much as possible, with the given inspection sample accuracy always upheld. A five-axis inspection path thus generated will, in general, match the kinematical loads on the stylus and the probe head with their respective kinematic capacities (i.e., the limit on the speed and the acceleration of an axis). As a direct result of this design, the five-axis inspection machine is able to work under the maximum or near-maximum working capacity of every axis, thus tremendously shortening the total inspection time, often 20-30 times as compared with a path generated by a traditional method, such as the isoplanar method. Our algorithm is particularly suitable for the five-axis continuous inspection of large free-form parts, such as those in automobile and aerospace industry. Currently, our method is a suboptimal solution, since the surface partitioning is required to start from the boundary of the surface. In the future, ...

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Automatic inspection of turbine blades using a 3-axis CMM together with a 2-axis dividing head

Cited by 48 publications

References 8 publications

Overview on the profile measurement of turbine blade and its development

Overview on the profile measurement of turbine blade and its development

Measurement of quality test of aerodynamic profiles in wind turbine blades using laser triangulation technique

Automatic Generation of Five-Axis Continuous Inspection Paths for Free-Form Surfaces

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