Relevant bibliographies by topics / Micro-endmilling

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  1. Journal articles
  2. Dissertations / Theses
  3. Book chapters
  4. Conference papers

Academic literature on the topic 'Micro-endmilling'

Author: Grafiati
Published: 4 June 2021
Last updated: 4 February 2022

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Journal articles on the topic "Micro-endmilling"

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Kim, Gun Hee, Gil Sang Yoon, Young Moo Heo, Sung Ho Jang, Tae Il Seo, and Myeong Woo Cho. "A Study on Tool Deflection Trend Using Real Captured Images in Micro Endmilling Process." Key Engineering Materials 364-366 (December 2007): 662–67. http://dx.doi.org/10.4028/www.scientific.net/kem.364-366.662.

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Recently, ultra-precision micro patterns and shapes have been widely used in optical field. Various methods which are based on semi-conductor fabrication methods are nowadays used in fabrication of micro shapes and patterns, but micro endmilling technology has lately attracted considerable attention because of various available materials, flexibility of process and high-productivity. For the precision micro endmilling process, analysis of micro cutting error is mandatory. In general, tool deflection is a major factor which causes cutting error and limits realization of the high-precision cutting process. Specially, in micro endmilling process, micro tool deflection generates very serious problems compared to macro tool deflection. In this paper, it is performed to observe the real tool deflection shapes in micro endmilling process, so the trend of micro tool deflection was analyzed using real captured images in this study. To get the real images of micro tool deflection, micro slot cutting processes were executed under various cutting conditions using micro endmill and the real images of tool deflection were obtained during cutting process by high-speed camera. Finally, the extent of tool deflection was calculated by the deflection angle according to cutting conditions and two trends (the point of first tool contact and the cutting stage) of micro tool deflection were analyzed.
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Nomura, Mitsuyoshi, Bo Xiao Ma, Osamu Horiuchi, Takayuki Shibata, Yoshihiko Murakami, and Masami Masuda. "Study on Machining Accuracy in Micro-Endmilling." Key Engineering Materials 516 (June 2012): 349–54. http://dx.doi.org/10.4028/www.scientific.net/kem.516.349.

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Micro end mills, for example, smaller than 0.5 mm in diameter have low strength and stiffness. They are rather difficult to be re-sharpened by grinding. Therefore they are usually used until their breakage or are exchanged for a new one when the machining results lose quality. In the previous study [, tool life up to breakage was experimentally investigated under various feed rates and some useful information was obtained to predict tool life considering a sort of bending fatigue. For each experiment, a new tool was used to machine slots till it broke due to fatigue and/or wear. In this study, in order to measure tool life based upon another point of reference, the machining accuracies of the above slots were investigated. The main results obtained are as follows: (1) Slot depth first increased due to thermal deformation of the spindle and then decreased due to tool wear, (2) Slot width decreased as the tool wear increased, (3) Slot bottom corner radius increased as the tool wear increased, (4) Burr size increased as the tool wear increased, (5) Surface roughness of the slot bottom seemed to be influenced by feed rate, tool wear and chatter.
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Nakai, Shin, Yukio Maeda, Daisuke Goto, Kazuya Kato, Hideaki Tanaka, Takanori Yazawa, and Tatsuki Otsubo. "Influence of Micro End Mill Tool Run-Out on Machining Accuracy." Key Engineering Materials 749 (August 2017): 21–26. http://dx.doi.org/10.4028/www.scientific.net/kem.749.21.

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Micro-channel chips used in micro total analysis systems have been attracting attention in the medical field. Photolithography, which is a technology used in semiconductor manufacturing, is used to manufacture micro-channel chip dies. This technology requires many processes, such as making photomasks, applying photoresist to a substrate, and the availability of expensive clean-room facilities. Micro-channel chips have ‘micro-channels,’ which are micro-grooves having a width of 30–100 μm. These fine grooves require high accuracy in manufacture; for example, the surface roughness on the bottom face is 1.0 μmRz. A previous study showed how tool run-out on the order of several μm incurred during micro-groove milling, reduced machining accuracy, and tool life. To bridge that gap, this study investigated how to form a fine groove by using micro endmilling. Specifically, a method was experimentally examined for reducing the influence of tool run-out on machining accuracy by using two types of endmill—two-tooth square and ball—by modifying the tool setting angle. Modifying the tool setting angle improved the surface roughness of one side of the groove, and reduced change of cutting force in two-tooth square-endmilling. In addition, it was able to reduce the influence of groove width on tool run-out by up to 1/10. A modification of tool setting angle in ball endmilling reduced the influence of tool run-out on machining accuracy.
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Elkaseer, AM, SS Dimov, DT Pham, KP Popov, L. Olejnik, and A. Rosochowski. "Material microstructure effects in micro-endmilling of Cu99.9E." Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture 232, no. 7 (September 22, 2016): 1143–55. http://dx.doi.org/10.1177/0954405416666898.

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This article presents an investigation of the machining response of metallurgically and mechanically modified materials at the micro-scale. Tests were conducted that involved micro-milling slots in coarse-grained Cu99.9E with an average grain size of 30 µm and ultrafine-grained Cu99.9E with an average grain size of 200 nm, produced by equal channel angular pressing. A new method based on atomic force microscope measurements is proposed for assessing the effects of material homogeneity changes on the minimum chip thickness required for a robust micro-cutting process with a minimum surface roughness. The investigation has shown that by refining the material microstructure the minimum chip thickness can be reduced and a high surface finish can be obtained. Also, it was concluded that material homogeneity improvements lead to a reduction in surface roughness and surface defects in micro-cutting.
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Arif, Muhammad, Mustafizur Rahman, Yoke San Wong, and Kui Liu. "Micro-Ball Endmilling of Tungsten Carbide for Micro-Molding and Prototyping Applications." Key Engineering Materials 516 (June 2012): 591–94. http://dx.doi.org/10.4028/www.scientific.net/kem.516.591.

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This paper presents micro-ball end milling of tungsten carbide using a CBN cutter to investigate its capability for machining slots for micro-moulds. Crack-free slots were machined at different axial depths of cut by inclining the work piece surface at different angles to the spindle axes to study the influence of these machining parameters on the cutting mechanism and surface finish. The experimental results show that up to 150 µm deep slots can be finished efficiently on tungsten carbide work pieces without leaving any fracture marks. It was identified that the chip disposal ability of micro-ball end milling reduced with increase in axial depth of cut. The cutting action was more efficient in up milling cuts compared to that in down milling when machining a slot. The inclination of the work piece proved propitious for machining slots with high-quality finish on tungsten carbide work pieces and a larger inclination angle also facilitated chip disposal.
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Horiuchi, Osamu, Bo Xiao Ma, Mitsuyoshi Nomura, Takayuki Shibata, Yoshihiko Murakami, and Masami Masuda. "Study on Tool Life by Breakage in Micro Endmilling." Advanced Materials Research 126-128 (August 2010): 214–19. http://dx.doi.org/10.4028/www.scientific.net/amr.126-128.214.

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To obtain some knowledge to predict the tool life caused by breakage, a series of slotting experiments was performed at various feed rates for high carbon steel by using coated carbide square end mills of 0.5mm in diameter. The main results obtained are as follows, (1) There found a possibility to obtain an optimum feed rate for the maximum slotting distance. (2) Lower feed rate caused chatter but higher feed rate rarely caused chatter. (3) A newly defined cumulative damage seems to be useful in some extent to predict tool life by monitoring cutting force.
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Lee, Jue-Hyun, and Angela A. Sodemann. "Geometrical Simulation of Chip Production Rate in Micro-EndMilling." Procedia Manufacturing 26 (2018): 209–16. http://dx.doi.org/10.1016/j.promfg.2018.07.029.

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KOMORI, Keigo, Noboru MORITA, Shigeru YAMADA, Noboru TAKANO, and Tatsuo OYAMA. "309 Milling force in micro endmilling and the vector representation." Proceedings of Conference of Hokuriku-Shinetsu Branch 2009.46 (2009): 97–98. http://dx.doi.org/10.1299/jsmehs.2009.46.97.

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Jun, Martin B. G., Keith Bourne, Richard E. DeVor, and Shiv G. Kapoor. "Estimation of effective error parameters in high-speed micro-endmilling." International Journal of Machine Tools and Manufacture 47, no. 9 (July 2007): 1449–54. http://dx.doi.org/10.1016/j.ijmachtools.2006.09.027.

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NAKAI, Shin, Yukio MAEDA, and Daisuke GOTO. "Influence of surface roughness on tool run-out with micro endmilling." Proceedings of Mechanical Engineering Congress, Japan 2016 (2016): S1310303. http://dx.doi.org/10.1299/jsmemecj.2016.s1310303.

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Dissertations / Theses on the topic "Micro-endmilling"

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"Chip Production Rate and Tool Wear Estimation in Micro-EndMilling." Doctoral diss., 2019. http://hdl.handle.net/2286/R.I.53594.

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abstract: In this research, a new cutting edge wear estimator for micro-endmilling is developed and the reliabillity of the estimator is evaluated. The main concept of this estimator is the minimum chip thickness effect. This estimator predicts the cutting edge radius by detecting the drop in the chip production rate as the cutting edge of a micro- endmill slips over the workpiece when the minimum chip thickness becomes larger than the uncut chip thickness, thus transitioning from the shearing to the ploughing dominant regime. The chip production rate is investigated through simulation and experiment. The simulation and the experiment show that the chip production rate decreases when the minimum chip thickness becomes larger than the uncut chip thickness. Also, the reliability of this estimator is evaluated. The probability of correct estimation of the cutting edge radius is more than 80%. This cutting edge wear estimator could be applied to an online tool wear estimation system. Then, a large number of cutting edge wear data could be obtained. From the data, a cutting edge wear model could be developed in terms of the machine control parameters so that the optimum control parameters could be applied to increase the tool life and the machining quality as well by minimizing the cutting edge wear rate. In addition, in order to find the stable condition of the machining, the stabillity lobe of the system is created by measuring the dynamic parameters. This process is needed prior to the cutting edge wear estimation since the chatter would affect the cutting edge wear and the chip production rate. In this research, a new experimental set-up for measuring the dynamic parameters is developed by using a high speed camera with microscope lens and a loadcell. The loadcell is used to measure the stiffness of the tool-holder assembly of the machine and the high speed camera is used to measure the natural frequency and the damping ratio. From the measured data, a stability lobe is created. Even though this new method needs further research, it could be more cost-effective than the conventional methods in the future.
Dissertation/Thesis
Doctoral Dissertation Mechanical Engineering 2019
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Liu, Xinyu. "Cutting mechanisms in micro-endmilling and their influence on surface generation /." 2006. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:3223660.

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Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 2006.
Source: Dissertation Abstracts International, Volume: 67-07, Section: B, page: 4067. Advisers: Shiv G. Kapoor; Richard E. DeVor. Includes bibliographical references (leaves 167-174) Available on microfilm from Pro Quest Information and Learning.
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Goo, Chan-Seo. "Development of a micro-milling force model and subsystems for miniature Machine Tools (mMTs)." Thesis, 2011. http://hdl.handle.net/1828/3433.

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Nowadays, the need for three-dimensional miniaturized components is increasing in many areas, such as electronics, biomedics, aerospace and defence, etc. To support the demands, various micro-scale fabrication techniques have been further introduced and developed over the last decades, including micro-electric-mechanical technologies (MEMS and LIGA), laser ablation, and miniature machine tools (mMTs). Each of these techniques has its own benefits, however miniature machine tools are superior to any others in enabling three-dimensional complex geometry with high relative accuracy, and the capability of dealing with a wide range of mechanical materials. Thus, mMTs are emerging as a promising fabrication process. In this work, various researches have been carried out based on the mMTs. The thesis presents micro-machining, in particular, micro-milling force model and three relevant subsystems for miniature machine tools (mMTs), to enhance machining productivity/efficiency and dimensional accuracy of machined parts. The comprehensive force model that predicts micro-endmilling dynamics has been developed. Unlike conventional macro-machining, the cutting mechanism in micro-machining is complex with high level of non-linearity due to the combined effects of edge radius, size, and minimum chip thickness effect, etc., resulting in no chip formation when the chip thickness is below the minimum chip forming thickness. Instead, part of the work material deforms plastically under the edge of a tool and the rest of the material recovers elastically. The developed force model for micro-endmilling is effective to understand the micro-machining process. As a result, the micro-endmilling force model is helpful to improve the quality of machined parts. In addition, three relevant subsystems which deliver maximum machining productivity and efficiency are also introduced. Firstly, ultrasonic atomization-based cutting fluid application system is introduced. During machining, cutting fluid is required at the cutting zone for cooling and lubricating the cutting tool against the workpiece. Improper cutting fluid application leads to significantly increased tool wear, and which results in overall poor machined parts quality. For the micro-machining, conventional cooling methods using high pressure cutting fluid is not viable due to the potential damage and deflection of weak micro-cutting tools. The new atomization-based cutting fluids application technique has been proven to be quite effective in machinability due to its high level of cooling and lubricating. Secondly, an acoustic emission (AE)-based tool tip positioning method is introduced. Tool tip setting is one of the most important factors to be considered in the CNC machine tool. Since several tools with different geometries are employed during machining, overall dimensional accuracy of the machined parts are determined by accurate coordinates of each tool tip. In particular, tool setting is more important due to micro-scale involved in micro-machining. The newly developed system for tool tip positioning determines the accurate coordinates of the tool tip through simple and easy manipulation. At last, with the advance of the 3D micro-fabrication technologies, the machinable miniaturized components are getting complex in geometry, leading to increased demand on dimensional quality control. However, the system development for micro-scale parts is slow and difficult due to complicated detection devices, algorithm, and fabrication of a micro-probe. Consequently, the entire dimensional probing system tends to become bulky and expensive. A new AE-based probing system with a wire-based probe was developed to address this issue with reduced cost and size, and ease of application.
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Book chapters on the topic "Micro-endmilling"

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Kim, Gun Hee, Gil Sang Yoon, Young Moo Heo, Sung Ho Jang, Tae Il Seo, and Myeong Woo Cho. "A Study on Tool Deflection Trend Using Real Captured Images in Micro Endmilling Process." In Optics Design and Precision Manufacturing Technologies, 662–67. Stafa: Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/0-87849-458-8.662.

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Conference papers on the topic "Micro-endmilling"

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Lee, Jue-Hyun, and Angela A. Sodemann. "Simulation of Cutting Edge Wear Model Based on Chip Production Rate in Micro-Endmilling." In ASME 2019 14th International Manufacturing Science and Engineering Conference. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/msec2019-3055.

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Abstract In this paper, simulation of cutting edge wear rate model based on the chip production rate in micro-endmilling is conducted in order to understand the state of the interaction between the tool and the workpiece. In micro-endmilling, the chip production rate changes due to the cutting edge wear and it can be explained by the minimum chip thickness effect. If the cutting edge radius increases due to the tool wear until the minimum chip thickness becomes larger than the uncut chip thickness, the chips will not be generated with the cutting tooth sliding on the workpiece. If the new tool with the sharp cutting edge is used, the chips will be generated without the cutting tooth sliding on the workpiece. From this point of view, the cutting edge wear could be observed by measuring the chip production rate in micro-endmilling. Therefore, the cutting edge wear rate model is proposed and the simulation of the cutting edge wear rate estimation is conducted. Our proposed cutting edge wear rate model could be used in improving the tool life and the surface quality by estimating the cutting edge wear rate.
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Liu, Xinyu, Martin B. G. Jun, Richard E. DeVor, and Shiv G. Kapoor. "Cutting Mechanisms and Their Influence on Dynamic Forces, Vibrations and Stability in Micro-Endmilling." In ASME 2004 International Mechanical Engineering Congress and Exposition. ASMEDC, 2004. http://dx.doi.org/10.1115/imece2004-62416.

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A dynamic cutting force and vibration model of the micro-endmilling process that accounts for the dynamics of the micro-endmill, influences of the stable built-up-edge, and the effects of minimum chip thickness, elastic recovery, and the elastic-plastic nature in ploughing/rubbing has been developed. Experimental validation has been performed, and the model is shown to predict the cutting force and tool vibration within an average of 12%. Using the model developed, effects of the minimum chip thickness and elastic recovery on the cutting forces and vibrations as well as process stability of the micro-endmilling process have been examined. The results indicate that the large edge radius relative to the feedrate causes the process stability to be sensitive to feedrate, resulting in the low feedrate instability phenomenon. The elastic recovery significantly increases the peak-to-valley cutting forces and enlarges the unstable feedrate range.
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A. M, Elkaseer, Popov K. B, Dimov S. S, and Minev R. "Material Microstructure Effect-based Investigation of Tool Wear in Micro-endmilling of Multi-phase Materials." In 7th International Conference on Multi-Material Micro Manufacture. Singapore: Research Publishing Services, 2010. http://dx.doi.org/10.3850/978-981-08-6555-9_186.

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Samuel, Johnson, Ashutosh Dikshit, Richard E. DeVor, Shiv G. Kapoor, and K. Jimmy Hsia. "Effect of Carbon Nanotube (CNT) Loading on the Thermo-Mechanical Properties and the Machinability of CNT-Reinforced Polymer Composites." In ASME 2008 International Manufacturing Science and Engineering Conference collocated with the 3rd JSME/ASME International Conference on Materials and Processing. ASMEDC, 2008. http://dx.doi.org/10.1115/msec_icmp2008-72028.

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The machinability of carbon nanotube (CNT)-reinforced polymer composites is studied as a function of CNT loading, in light of the trends seen in their material properties. To this end, the thermo-mechanical properties of CNT composites with different loadings of CNTs are characterized. Micro endmilling experiments are also conducted on all the materials under investigation. Chip morphology, burr width, surface roughness and cutting forces are used as the machinability measures to compare the composites. For composites with lower loadings of CNTs (1.75% by weight), the visco-elastic/plastic deformation of the polymer phase plays a significant role during machining, whereas, at loadings ≥ 5% by weight, the CNT distribution and interface effects dictate the machining response of the composite. The ductile-to-brittle transition and reduction in fracture strength that occurs with an increase in CNT loading, results in reduced minimum chip thickness values, burr dimensions and cutting forces in the CNT composite. The increase in thermal conductivity with the increase in CNT loading, results in reduced number of adiabatic shear bands being observed on the chips and reduced thermal softening effects at high cutting velocities. Thus, overall the increase in CNT loading improves the machinability of the composite.
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Liu, Xinyu, Ning Lou, Swapnil Patole, Dan Rutman, Yachao Wang, and Jing Shi. "Experimental Investigation of Micro-Machinability of Nano-TiC Reinforced Inconel Fabricated by Direct Metal Laser Melting." In ASME 2015 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/imece2015-51218.

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The objective of this paper is to experimentally investigate the machinability of nano-TiC reinforced Nickel based super alloy Inconel 718 fabricated by direct metal selective laser melting (SLM). Four 10×10×3 square test coupons were fabricated with different amount of nano-TiC: (1) pure Inconel 718, (2) Inconel 718+0.25% TiC, (3) Inconel 718 + 0.5% TiC, of 508 microns. The machinability of the four materials were examined in terms of cutting forces, tool wear and chip morphology. Three level of federates (1.0, 1.5 and 2.0 um/flute) and three level of spindle speeds (12,000, 15,000 and 18,000 rpm) were selected and a 32 full factorial experiment was performed on each test coupon. Full immersion slotting was selected with a fixed axial depth of cut at 20 microns. The SEM images of the tools reveal that the dominant wear mechanisms were abrasive wear at the tool tip and flank face. The adhesion and build up edge were also common. The wear rate increases with the addition of nano-TiC. The loss of the AlTiC coating will result in accelerated wear, which was observed for machining of nano-TiC reinforced Inconel 718, but not on pure Inconel 718. The edge chipping and abrasive wear at the tool tip reduced the effective cutting diameter, enlarged the edge radius, and caused the increase of the cutting force. For all the materials tested, the cutting chips had serrated edge on the free surface and much smoother surface on the other side, which suggests that a cyclic chip formation of alternating high shear strain followed by low shear strain. This is in agreement with the chip formation mechanism for the Inconel 718 fabricated with conventional method rather than DMLS. The serration is more severe with the and (4) Inconel 718 + 1% TiC. Tensile tests were performed on all four material and the material strength increases with the increase of the TiC content up to 0.5% then plateaued. The elongation drop significantly with the inclusion of TiC in Inconel substrate. Micro-endmilling experiments were conducted using AlTiN coated WC micro-mill with nominal diameter addition of nano-TiC. The cutting forces were collected with a Kistler 3-axial load cell 9017B. The cutting forces increases with the increase spindle speed (hence surface speed) within the range examined, but the effect of feedrate is not statistically significant. The cutting forces were much higher for TiC reinforced Inconel and the magnitude of the cutting forces increases with the increase of the weight percentage of TiC contents.
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