A vision-based method for dimensional in situ measurement of cooling holes in aero-engines during laser beam drilling process

Sun, Weifang; Yi, Jiyan; Ma, Guang; Li, Fengping; Liu, Xiaogang; Gao, Feng; Lu, Chengji

doi:10.1007/s00170-021-08463-8

Cited by 14 publications

(7 citation statements)

References 35 publications

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“…The FFCs of each component decomposed by the above methods are calculated and listed in table 4 [33]. The results of SOA-VMD, SMA-VMD, and AVMD are similar, which demonstrate an excellent decomposition ability.…”

Section: The Proposed Methods (Avmd)mentioning

confidence: 92%

Research on feature extraction and separation of mechanical multiple faults based on adaptive variational mode decomposition and comprehensive impact coefficient

Zhang¹,

Li²,

Li³

et al. 2022

Meas. Sci. Technol.

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Because it is difficult to extract multiple fault features from mechanical equipment under the interference of background noise and the parameters used in variational mode decomposition (VMD) must be determined in advance, a multiple fault separation method based on adaptive variational mode decomposition (AVMD) is proposed in this research to address these issues. Firstly, a novel index, known as the comprehensive impact coefficient (CIC), is established to properly identify the signal's fault features. Thereafter, the fitness function of the sparrow search algorithm is developed based on the CIC, and the VMD parameters selection problem is solved. Finally, the decomposed modal components are subjected to envelop demodulation analysis, and the failure type of the bearing is assessed through the envelope spectrum. The simulation and experimental results reveal that the AVMD method can effectively separate all single faults from multiple faults, thus accurately diagnosing bearing faults.

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Section: The Proposed Methods (Avmd)mentioning

confidence: 92%

Research on feature extraction and separation of mechanical multiple faults based on adaptive variational mode decomposition and comprehensive impact coefficient

Zhang¹,

Li²,

Li³

et al. 2022

Meas. Sci. Technol.

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“…Given the above-mentioned limitations, future research will introduce machine vision and other methods to automatically identify and calculate hole defects to improve the measurement efficiency [24][25][26][27][28][29] and the orthogonal test method [30,31] to reduce the number of tests and the order of the fuzzy complementary judgment matrix.…”

Section: Discussionmentioning

confidence: 99%

Synthesize evaluation method of characteristic defects in hole drilling of carbon fiber reinforced polymer

Liang

Liu

Guan

2023

Preprint

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Carbon fiber reinforced polymer (CFRP) composites are widely used in various fields because of their high strength, good toughness, and low density. However, owing to their unique forming process, some complex structures such as holes and grooves cannot be formed directly. Therefore, traditional machining procedures are also required. The drilling process is one of the most common machining methods for CFRP material holes, but owing to the complex structure and difficulty in processing CFRP composite material, the quality of the drilling process is often challenging to guarantee. Moreover, the hole-forming defects also have complex forms and lack uniform evaluation indexes. This study summarizes the common orifice defects in the process of CFRP drilling, establishes a comprehensive evaluation method of orifice defects by introducing the relevant theory of the fuzzy complementary judgment matrix, and experimentally verifies the accuracy and reliability of this method. Then, based on the experimental results, a non-linear cutting parameter optimization model is established, which effectively suppresses the orifice defects to ensure the accuracy of the hole size, roundness, and hole wall roughness. The hole-forming quality is subsequently improved. The hole quality evaluation method proposed in this study reduced the dimension of the evaluation index to ensure relevance and effectiveness and improved the convenience of quality inspection and parameter optimization in actual production.

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“…However, in situ measurements during the manufacturing process of cooling holes can timely detect errors, allowing for adjustment and optimization of manufacturing parameters, enhancing manufacturing quality to its maximum and avoiding defective workpieces. Weifang Sun [7] implemented an in-situ measurement method during the drilling process by integrating an image-capturing device into a laser drilling machine with an image edge feature extraction algorithm, enabling the measurement of cooling holes' diameter and Munkelt [54] addressed the issue of thermal barrier coating potentially covering or filling cooling holes. An optical 3D scanning method based on the fringe projection principle was utilized to scan the blades, enabling the automatic detection of covered cooling holes and precise guidance for the laser drilling process.…”

Section: Optical Measurement Technologymentioning

confidence: 99%

“…However, in situ measurements during the manufacturing process of cooling holes can timely detect errors, allowing for adjustment and optimization of manufacturing parameters, enhancing manufacturing quality to its maximum and avoiding defective workpieces. Weifang Sun [7] implemented an in-situ measurement method during the drilling process by integrating an image-capturing device into a laser drilling machine with an image edge feature extraction algorithm, enabling the measurement of cooling holes' diameter and roundness. The experimental results indicate that the absolute errors of the diameter and roundness are 0.05 µm and 11.13 µm, respectively.…”

Section: Optical Measurement Technologymentioning

confidence: 99%

See 1 more Smart Citation

Advances in Aeroengine Cooling Hole Measurement: A Comprehensive Review

Yan,

Shi,

et al. 2024

Sensors

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Film cooling technology is of great significance to enhance the performance of aero-engines and extend service life. With the increasing requirements for film cooling efficiency, researchers and engineers have carried out a lot of work on the precision and digital measurement of cooling holes. Based on the above, this paper outlines the importance and principles of film cooling technology and reviews the evolution of cooling holes. Also, this paper details the traditional measurement methods of the cooling hole used in current engineering scenarios with their limitations and categorizes digital measurement methods into five main types, including probing measurement technology, optical measurement technology, infrared imaging technology, computer tomography (CT) scanning technology, and composite measurement technology. The five types of methods and integrated automated measurement platforms are also analyzed. Finally, through a generalize and analysis of cooling hole measurement methods, this paper points out technical challenges and future trends, providing a reference and guidance for forward researches.

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A vision-based method for dimensional in situ measurement of cooling holes in aero-engines during laser beam drilling process

Cited by 14 publications

References 35 publications

Research on feature extraction and separation of mechanical multiple faults based on adaptive variational mode decomposition and comprehensive impact coefficient

Research on feature extraction and separation of mechanical multiple faults based on adaptive variational mode decomposition and comprehensive impact coefficient

Synthesize evaluation method of characteristic defects in hole drilling of carbon fiber reinforced polymer

Advances in Aeroengine Cooling Hole Measurement: A Comprehensive Review

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