The Experts below are selected from a list of 11082 Experts worldwide ranked by ideXlab platform
Giuseppe Casalino - One of the best experts on this subject based on the ideXlab platform.
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on the laser Scarfing of epoxy resin matrix composite with copper reinforcement
Manufacturing letters, 2021Co-Authors: Nicola Contuzzi, Michelangelo Mortello, Giuseppe CasalinoAbstract:Abstract This paper explores the effects of the scanning strategy and several fundamental process parameters, like laser power, scanning speed and frequency, on the quality of a carbon-fiber reinforced polymer (CFRP) component processed by laser Scarfing. Specifically, the composite consisted of an epoxy resin matrix with woven carbon fibers reinforced with copper wires. Particular attention was paid to the ablation depth and to the quality of the Scarfing area. The integrity of the copper fibers is intrinsically correlated to the functionality of the material after the Scarfing process, which was assessed in the paper.
Řezáč Matěj - One of the best experts on this subject based on the ideXlab platform.
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On the technology of tube Scarfing
Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2016Co-Authors: Řezáč MatějAbstract:Diplomová práce je zaměřena na technologii odjehlování podélných svarů ve svařovaných trubkách. V teoretické části jsou popsány metody výroby trubek. Dále je zde rozebrána metoda, která se používá ve firmě Mubea. V experimentální části je návrh dvou inovovaných technologií odjehlování svarů trubek, jejich experimentální ověření a následné vyhodnocení. Dále je v experimentální části návrh stroje, který je pro tuto operaci nutno vyrobit.The thesis is focused on the technology of Scarfing longitudinal welds in welded tubes. The theoretical part describes methods of production tubes. It also analyzes the method used in Mubea company. The experimental part presents the design of two innovative technologies of Scarfing welds tubes, their experimental validation and subsequent evaluation. The experimental part also presents a design of the machine that must be produced for this operation.
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On the technology of tube Scarfing
Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2016Co-Authors: Řezáč MatějAbstract:The thesis is focused on the technology of Scarfing longitudinal welds in welded tubes. The theoretical part describes methods of production tubes. It also analyzes the method used in Mubea company. The experimental part presents the design of two innovative technologies of Scarfing welds tubes, their experimental validation and subsequent evaluation. The experimental part also presents a design of the machine that must be produced for this operation
Sang Woo Kim - One of the best experts on this subject based on the ideXlab platform.
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Detection of Scarfing Faults on the Edges of Slabs
ISIJ International, 2014Co-Authors: Sang-gyu Ryu, Doo-chul Choi, Yong-ju Jeon, Sang Jun Lee, Jong Pil Yun, Sang Woo KimAbstract:At present, quality control is becoming a major issue in steel production. Thus we developed an algorithm that uses machine vision to detect Scarfing faults on slabs, which impairs the steel quality of subsequent products such as steel plates. Scarfing faults typically occur in three locations: the top, middle, and edge of the slab. Our proposed algorithm is focused on detecting Scarfing faults on the edge of slab, which is tiny and sometimes indistinct. A machine vision system with a line scan camera was designed, which facilitates the detection of brightness differences and texture differences between well-scarfed and poorly-scarfed slab surface. Scarfing faults are tiny on the edges, so we propose a new segmentation method that takes advantage of capabilities of the line scan camera. A segmented image is filtered using Gabor filters, which were designed to focus on the boundary with Scarfing faults to identify specific regions with defect, referred to as defect candidates. Each defect candidate is classified using a Support Vector Machine (SVM) classifier based on its extracted features. Our proposed algorithm was effective according to the experimental trials using 2 061 frame images acquired from real samples, where the true detection rate was 97.26{%} and the false detection rate was 1.66{%}. Our proposed system and algorithm based on machine vision technology facilitates Scarfing faults detection, which can be detected before rolling process, resulting in improved steel quality.
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faulty Scarfing slab detection using machine vision
Advanced Materials Research, 2012Co-Authors: Doo-chul Choi, Yong-ju Jeon, Sang Woo KimAbstract:In this study, we developed a detection algorithm using machine vision for faulty Scarfing on slabs. Scarfing is a process for burning out defective areas on the surface of semi-finished steel products so that the product is suitable for subsequent rolling or forging. In the case of rolling, a poorly scarfed slab can cause serious defects. Therefore, an automatic inspection system for scarfed slabs should be developed. In the image of faultily scarfed slab, discontinuous bright bands and borderlines are observed. To detect the bright bands, we examined the real part of a Gabor filter. However, because the size of the bright bands is not fixed, the parameters of the real part of the Gabor filter were determined adaptively using the imaginary part of the Gabor filter. The performance of the proposed algorithm was tested with 2292 images of scarfed slabs of which 49 of the images were of faulty scarfed slabs. The proposed algorithm was able to detect defects with 95.9% accurate and the false alarm was 1.6%.
Nicola Contuzzi - One of the best experts on this subject based on the ideXlab platform.
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on the laser Scarfing of epoxy resin matrix composite with copper reinforcement
Manufacturing letters, 2021Co-Authors: Nicola Contuzzi, Michelangelo Mortello, Giuseppe CasalinoAbstract:Abstract This paper explores the effects of the scanning strategy and several fundamental process parameters, like laser power, scanning speed and frequency, on the quality of a carbon-fiber reinforced polymer (CFRP) component processed by laser Scarfing. Specifically, the composite consisted of an epoxy resin matrix with woven carbon fibers reinforced with copper wires. Particular attention was paid to the ablation depth and to the quality of the Scarfing area. The integrity of the copper fibers is intrinsically correlated to the functionality of the material after the Scarfing process, which was assessed in the paper.
Alan Wells - One of the best experts on this subject based on the ideXlab platform.
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Matrix control of scarring
Cellular and Molecular Life Sciences, 2011Co-Authors: Cecelia C. Yates, Richard Bodnar, Alan WellsAbstract:Repair of wounds usually results in restoration of organ function, even if suboptimal. However, in a minority of situations, the healing process leads to significant scarring that hampers homeostasis and leaves the tissue compromised. This scar is characterized by an excess of matrix deposition that remains poorly organized and weakened. While we know much of the early stages of the repair process, the transition to wound resolution that limits scar formation is poorly understood. This is particularly true of the inducers of scar formation. Here, we present a hypothesis that it is the matrix itself that is a primary driver of scar, rather than being simply the result of other cellular dysregulations.
