Relevant bibliographies by topics / Ultrasonic machining process

Contents

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

Academic literature on the topic 'Ultrasonic machining process'

Author: Grafiati
Published: 6 September 2023

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Journal articles on the topic "Ultrasonic machining process"

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Xiao, Qiang. "Research on the Machining Principle and Experinment of Ultrasonic Machining." Applied Mechanics and Materials 373-375 (August 2013): 1983–86. http://dx.doi.org/10.4028/www.scientific.net/amm.373-375.1983.

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Ultrasonic machining is a non-conventional machining process. Ultrasonic machining offers an effective alternative for ultra precision machining of hard and brittle materials due to its unique characteristics. This paper did a comprehensive analysis on ultrasonic machining mechanism in theory. The experiment compared this ultrasonic machining process with the common machining process in surface quality is done and the experimental result show that the smooth high quality surface can be obtained under ultrasonic machining.
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Yu, Jian Wu, Lucjan Dabrowski, Shao Hui Yin, and Zbigniew Lechniak. "Productivity of EDM Process Assisted by Ultrasonic Waves." Solid State Phenomena 175 (June 2011): 157–60. http://dx.doi.org/10.4028/www.scientific.net/ssp.175.157.

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Ultrasonic assisted electrical discharge machining (USEDM) is one of hybrid machining methods based on the EDM process. The effects of ultrasonic waves on EDM process were analyzed and the experimental investigation of productivity of steel induced by USEDM was reported. Results indicated that ultrasonic waves and cavitation played an important role in improving the flushing and machining efficiency during USEDM. And the material removal rate of EDM assisted by ultrasonic waves was improved greatly.
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Kimme, Simon, Nessma Hafez, Christian Titsch, Jonas Maximilian Werner, Andreas Nestler, and Welf-Guntram Drossel. "Close-to-process strain measurement in ultrasonic vibration-assisted turning." Journal of Sensors and Sensor Systems 8, no. 2 (2019): 285–92. http://dx.doi.org/10.5194/jsss-8-285-2019.

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Abstract. The application of ultrasonic vibration assistance in machining offers many benefits over conventional machining. In some machining processes, like the generation of geometrically defined microstructures by cutting, the interaction of the system components and the machining process can be particularly crucial with respect to the production result. Monitoring of ultrasonic vibration-assisted machining in terms of the in-process measurement of frequency and amplitude is currently realized by measurement inside the actuator; thus, measurement is presently undertaken relatively far away from the cutting process. In this paper an in-process measurement set-up based on strain gauges positioned close to the cutting edges is presented. It is used to investigate the induced vibration in the ultrasonic horn. Experiments on machine samples with and without ultrasonic vibration assistance are performed using the in-process measurement set-up described. The results of the strain gauges are analysed in comparison to internal feedback signal and surface measurements. The experiments show the high sensitivity of the measurement set-up presented and a huge gain of information compared with the conventional measurement approach. This enables improved controllability of the excited mode shapes as well as in-process adjustment of the ultrasonic vibration frequency and amplitude for the manufacturing of defined microstructures.
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Ye, Hong-xian, Xu-yi Yang, Xiao-ping Hu, Bao-hua Yu, and Xi Kang. "Research on correlation model between transducer temperature and acoustic performance parameters of ultrasonic machining system." AIP Advances 12, no. 11 (2022): 115303. http://dx.doi.org/10.1063/5.0124897.

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In the process of ultrasonic vibration cutting (UVC), the acoustic performance parameters of ultrasonic machining system change because of systems heating up and cutting loads. The changes of acoustic performance parameters will affect resonant frequency, impedance, and power match of the ultrasonic machining system, and stability of the amplitude of UVC system. It is hard to monitor the acoustic performance parameters online. Based on the analysis of the correlation mechanism between transducer temperature and acoustic performance parameters, the correlation models between transducer temperature and resonance frequency, static capacitance, and dynamic resistance of ultrasonic vibration machining system are established by curve regression analysis modeling method. The acoustic performance parameters of an ultrasonic vibration machining system are determined by transducer temperature using the correlation models. The effectiveness of the model is verified by experiments. It gives the information for the stability evaluation of the ultrasonic vibration machining process, the dynamic impedance matching of the ultrasonic machining system, and the power matching adjustment of the ultrasonic power supply.
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Wang, Z. Y., and K. P. Rajurkar. "Dynamic Analysis of the Ultrasonic Machining Process." Journal of Manufacturing Science and Engineering 118, no. 3 (1996): 376–81. http://dx.doi.org/10.1115/1.2831039.

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This paper presents a dynamic analysis of the ultrasonic machining process based on impact mechanics. Equations representing the dynamic contact force and stresses caused by the impinging of abrasive grits on the work, are obtained by solving the three-dimensional equations of motion. The factors affecting the material removal rate have been studied. It is found that the theoretical estimates obtained from the dynamic model are in good agreement with the experimental results.
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Teimouri, R., H. Baseri, and Rasoul Moharami. "Multi-responses optimization of ultrasonic machining process." Journal of Intelligent Manufacturing 26, no. 4 (2013): 745–53. http://dx.doi.org/10.1007/s10845-013-0831-1.

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Isobe, Hiromi, Yusuke Uehara, Keisuke Hara, Takashi Onuma, and Arata Mihara. "Experimental Verification of Machining Process of Ultrasonic Drilling." Key Engineering Materials 516 (June 2012): 275–80. http://dx.doi.org/10.4028/www.scientific.net/kem.516.275.

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Drill processing of difficult-to-cut materials such as ceramics, hardened steel, glass and heat-resistant steel is widely required in the industrial world. Furthermore the drilling process becomes more and more difficult in the case of hole diameters less than one millimetre. In order to achieve the requirements for the drilling process, ultrasonically assisted machining is applicable. Ultrasonic vibration assisted machining techniques are suitable for machining difficult-to-cut materials precisely. However, the cutting process of ultrasonic drilling has not been clarified. It is difficult to observe directly the effect of vibration. The aim of this study is to observe the dynamic, instantaneous and micro cutting process. In this report, a high-speed camera with a polarized device, which is appropriately arranged, realized the visualization of the process of ultrasonic drilling based on photoelastic analysis. For conventional drilling, the stress distribution diagram showed that the intensive stress occurred in limited areas under the chisel because the chisel edge of the drill produces large plastic deformation. On the other hand, the ultrasonic drilling produced spread stress distribution and a stress boundary far away from the chisel. The photoelastic analysis showed the explicit difference of drilling processes.
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Zeng, Wei Min, Xi Peng Xu, and Zhi Jian Pei. "Rotary Ultrasonic Machining of Advanced Ceramics." Materials Science Forum 532-533 (December 2006): 361–64. http://dx.doi.org/10.4028/www.scientific.net/msf.532-533.361.

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Rotary ultrasonic machining (RUM) is one of the cost-effective machining methods for advanced ceramics, which is a hybrid machining process that combines the material removal mechanisms of diamond grinding and ultrasonic machining (USM). This paper presents an overview of the investigations on RUM of advanced ceramics. The issues about the material removal mechanisms, process modeling, material removal rate, and tool wear in RUM are reviewed. Directions of future research on RUM are also presented.
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WANG, Jingsi, Keita SHIMADA, Masayoshi MIZUTANI, and Tsunemoto KURIYAGAWA. "B014 Influence of Process Parameters on Ultrasonic Machining using Smoothed Particle Hydrodynamics." Proceedings of International Conference on Leading Edge Manufacturing in 21st century : LEM21 2013.7 (2013): 214–19. http://dx.doi.org/10.1299/jsmelem.2013.7.214.

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Praneetpongrung, Chaiya, Yasushi Fukuzawa, and Shigeru Nagasawa. "Effects of Combined Ultrasonic Vibration during the Sinking EDM Process for Cemented Carbide." Advanced Materials Research 76-78 (June 2009): 657–63. http://dx.doi.org/10.4028/www.scientific.net/amr.76-78.657.

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In recent years, to improve the electrical discharge machining properties, several trials have been applied with the ultrasonic vibration system which was combined on the sinking electrical discharge machine. In this paper, the effects of the ultrasonic vibration were investigated with the designed sinking EDM machine. Some experimental parameters of tool electrode polarity, rotational workpiece speed and directions were examined during the sinking EDM process on the cemented carbide material of G5. Material removal rate, electrode wear ratio and surface roughness were estimated as the machining properties under finishing machining conditions. The experiments were carried out on ultrasonic longitudinal frequency 59 kHz and electrode spindle till 1,000 rpm. Two rotational apparatuses were used simultaneously on the opposite rotational direction during discharge machining. The discharge conditions were estimated with the waveforms analysis. As the results, the EDM device system which was combined ultrasonic vibration, improved the material removal rate and surface roughness of the EDMed workpiece.
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Dissertations / Theses on the topic "Ultrasonic machining process"

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Chang, Hsueh Yu, and 張學宇. "Monitoring of Ultrasonic Machining Process by Time-Frequency Analysis." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/54401803882195265563.

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碩士<br>國立臺灣科技大學<br>機械工程系<br>104<br>Ultrasonic machining is one of the most common methods in brittle materials. The quality of workpiece is usually influenced by processing parameters, such as abrasive particle and tool amplitude. In the past, most of the literature focused on optimization of processing parameters to improve the surface quality and few people studied in the connection between signals and workpiece quality. Besides, there is no way to monitor the ultrasonic process. In general, we can’t understand the workpiece quality and calibrate the machine before the end of machining. This study will use the dynamometer to capture force signal during machining, and the Empirical Mode Decomposition is applied to analyze the vibration mode, including cavitation effect, impact and hammer effect. After capturing the characteristics of the vibration mode, such as Marginal Spectrum, power, and mean frequency, we establish a measurement mechanism which can distinguish the stability of machine and workpiece quality by force signal. This measure mechanism can be also applied to monitor the ultrasonic machining process. Furthermore, the tool and horn are self-designed. In order to enhance the design accuracy, we not only used modal analysis and harmonic response analysis in ANSYS but ensure the result is as same as the measurement when the horn is without loading.
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Wang, Hsueh-Ming Steve. "Analysis of the effect of process parameters on material removal rate in ultrasonic machining /." Diss., 1998. 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:9914251.

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Al-okaily, Ala'a M. "Adaptive cutting force control for process stability of micro ultrasonic machining." 2010. http://digitalcommons.unl.edu/imsediss/5.

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Thesis (M.S.)--University of Nebraska-Lincoln, 2010.<br>Title from title screen (site viewed July 22, 2010). PDF text: xi, 79 p. : ill. (some col.) Publication: Industrial and Management Systems Engineering -- Dissertations and Student Research. Includes bibliographical references.
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Cheng, Fu-Yao, and 鄭富堯. "Process Parameters Analysis for Ultrasonic Vibration Assisted Machining on Tempered Glass Material." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/59199182782783599353.

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碩士<br>國立聯合大學<br>機械工程學系碩士班<br>101<br>In recent years, smart phones become popular modern communication tools, taking into account the quality of the product and function, the manufacturer must be thinner mobile phone panels. For strength and life cycle of the demand, deeper glass reinforcing layer, increases the difficulty of processing technology. High speed CNC machine tools for processing tempered glass panel, with the testing standards improved, has been unable to achieve both quality and efficiency. This study investigates the optimal parameters of drilling process for tempered glass material by ultrasonic vibration assisted CNC machining. Using Taguchi methods, the optimal parameters for reducing burrs and machining time can be obtained based on drilling burrs less than 0.10 mm and machining time less than 50 second for initial machining. The control factors include: (A) the particle size of tool, (B) spiral feed rate, (C) tool angle of spiral operation, and (D) vibration amplitude. Three levels of each control factor establish the L9(34) orthogonal array. The influence and contribution of each contol factor are observed by the analysis of signal-to-noise ratios (S/N) and analysis of variance (ANOVA). The results demonstrate the optimal combination of process parameters is (A3B1C1D3). The control factors affect the processing quality in order are A, C, B and D.
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Chu, Kung-To, and 朱恭德. "Grey relational analysis to optimize the ultrasonic machining process with multiple performance characteristics." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/79398113264855313675.

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碩士<br>逢甲大學<br>機械工程學所<br>95<br>Ceramics is regarded as the most hardness, and it also be regarded as the important material in the industry. The methods of ceramics artifact are Grinding, Polishing, Barrel, Finishing, Ultrasonic Machining and Cutting. Especially the Ultrasonic Machining is the chief quality to control the ceramics products. The way of Ultrasonic Machining is mixing Diamond Polishing and Ultrasonic join the Data Encryption for the accurate quality. Therefore, the way of ceramics artifact analysis is using ceramics Ultrasonic Machining. Feed rate, spine speed, cutting deeps, cutting width are experiment factorial of the report. Every experiment factorial has three levels at the same time. Also, it uses Taguchi Orthogonal Array for experiment, then gets result of Surface Toughness, Cutter Wears, and use Grey Relational Theory to analyze ceramics multiple performance characteristics to test and verify in the last period. Grey Relational Theory is mixing Grey Relational Analyze Theory and Taguchi Method. It can reduce the experiment times and cost. It’s the best collection to analyze the multiple performance characteristics.
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Books on the topic "Ultrasonic machining process"

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Fuling, Zhao, ed. Mian xiang kuai su zhi zao de te zhong jia gong ji shu: Non-traditional machining technology oriented rapid manufacturing. Guo fang gong ye chu ban she, 2009.

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Intelligent Energy Field Manufacturing: Interdisciplinary Process Innovations. CRC, 2010.

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Zhang, Wenwu. Intelligent Energy Field Manufacturing: Interdisciplinary Process Innovations. Taylor & Francis Group, 2018.

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Zhang, Wenwu. Intelligent Energy Field Manufacturing: Interdisciplinary Process Innovations. Taylor & Francis Group, 2018.

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Zhang, Wenwu. Intelligent Energy Field Manufacturing: Interdisciplinary Process Innovations. Taylor & Francis Group, 2018.

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Zhang, Wenwu. Intelligent Energy Field Manufacturing: Interdisciplinary Process Innovations. Taylor & Francis Group, 2018.

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Book chapters on the topic "Ultrasonic machining process"

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Cong, Weilong, and Zhijian Pei. "Process of Ultrasonic Machining." In Handbook of Manufacturing Engineering and Technology. Springer London, 2014. http://dx.doi.org/10.1007/978-1-4471-4670-4_76.

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Singh, Rupinder, and Sudhir Kumar. "Modified Ultrasonic Machining Process." In Non-Conventional Hybrid Machining Processes. CRC Press, 2020. http://dx.doi.org/10.1201/9780429029165-4.

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Cong, Weilong, and Zhijian Pei. "Process of Ultrasonic Machining." In Handbook of Manufacturing Engineering and Technology. Springer London, 2013. http://dx.doi.org/10.1007/978-1-4471-4976-7_76-1.

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Das, S., B. Doloi, and B. Bhattacharyya. "Recent Advancement on Ultrasonic Micro Machining (USMM) Process." In Materials Forming, Machining and Tribology. Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-52009-4_2.

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Bhowmik, Sumit, Jagadish, and Kapil Gupta. "Modeling and Optimization of Ultrasonic Machining Process." In Modeling and Optimization of Advanced Manufacturing Processes. Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-030-00036-3_4.

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Dandge, Shruti, and Shankar Chakraborty. "Selection of Machining Parameters in Ultrasonic Machining Process Using CART Algorithm." In Advanced Engineering Optimization Through Intelligent Techniques. Springer Singapore, 2019. http://dx.doi.org/10.1007/978-981-13-8196-6_52.

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Banerjee, B., S. Doloi, S. Das, and D. Dhupal. "Parametric Optimization of MRR During Ultrasonic Machining Process." In Lecture Notes in Mechanical Engineering. Springer Nature Singapore, 2022. http://dx.doi.org/10.1007/978-981-19-7150-1_21.

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Srivastava, Shubham, Pravendra Kumar, and S. K. S. Yadav. "Development and Experimental Study of Ultrasonic Assisted Electrical Discharge Machining Process." In Lecture Notes on Multidisciplinary Industrial Engineering. Springer Singapore, 2019. http://dx.doi.org/10.1007/978-981-32-9471-4_8.

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Mirad, Mehdi Mehtab, Jiomani Talukdar, and Bipul Das. "Analysis of Tool Defect in Ultrasonic Machining Process Through Numerical Modelling." In Lecture Notes in Mechanical Engineering. Springer Nature Singapore, 2022. http://dx.doi.org/10.1007/978-981-19-3266-3_35.

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Singh, Anand Mohan, Ranjan Majhi, and Promod Kumar Patowari. "Machinability Study for Slot Cutting on Glass Using Ultrasonic Machining Process." In Lecture Notes in Mechanical Engineering. Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-15-7711-6_76.

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Conference papers on the topic "Ultrasonic machining process"

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Wang, Hsueh-Ming S., Louis Plebani, and G. Sathyanarayanan. "Ultrasonic Machining: 1907 to Present." In ASME 1997 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 1997. http://dx.doi.org/10.1115/imece1997-1149.

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Abstract The term Ultrasonic machining (USM) can be applied to any machining process which uses ultrasonic energy to erode brittle materials. The process has been successfully used to assist deburring, polishing, lapping, grinding, and drilling operations. Hardened steel, glass, ruby, and ceramics have been finish machined with a control of geometry and surface roughness under one micron. Applications have included optical products, dies and molds, structural ceramics and IC chips. The main topics of this article include machine tool renovation, work material application, accuracy of workpiece tolerance, the changing market and past research. Original developments in the Soviet Union, Germany, England, Japan, and the USA are surveyed. Possible areas of future research are identified.
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Singh, Jaspreet, Chandandeep Singh, Kanwaljit Singh, Rupesh Gupta, and Rakesh Goyal. "Analysis of Various Machining Parameters for Computer Controlled Ultrasonic and Rotary Machining Process." In 2021 3rd International Conference on Advances in Computing, Communication Control and Networking (ICAC3N). IEEE, 2021. http://dx.doi.org/10.1109/icac3n53548.2021.9725743.

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Liu, Meng-Kun, Hsueh-Yu Chang, and Han Kuo. "Monitoring of ultrasonic machining process by time-frequency analysis." In 2017 IEEE/SICE International Symposium on System Integration (SII). IEEE, 2017. http://dx.doi.org/10.1109/sii.2017.8279216.

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Wang, Hui, Dongzhe Zhang, Yunze Li, Weilong Cong, and Anthony R. Burks. "Delamination in Surface Machining of CFRP Composites Using Rotary Ultrasonic Machining With Horizontal Ultrasonic Vibration." In ASME 2020 15th International Manufacturing Science and Engineering Conference. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/msec2020-8246.

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Abstract Surface machining of carbon fiber reinforced plastic (CFRP) using rotary ultrasonic machining (RUM) with vertical ultrasonic vibration was effective in reducing many issues, including high cutting force, high torque, and high tool wear rate. The vertical ultrasonic vibration also induced damages to machined CFRP surfaces and then resulted in increased surface roughness. To simultaneously decrease surface roughness and cutting force, the direction of ultrasonic vibration needed to be parallel with the surface generation direction (horizontal feeding direction). The horizontal ultrasonic vibration was then developed and applied for RUM surface machining of CFRP. The application of horizontal ultrasonic vibration in RUM surface machining produced simultaneously decreased surface roughness and cutting force. However, there were no investigations on delamination in such a process, and delamination was considered as one of the major factors to reject the machined CFRP products. This investigation would study the delamination under different machining-variable groups, the delamination generation mechanisms, and the relationships between delamination and cutting forces through the experimental method in surface machining of CFRP using RUM with horizontal ultrasonic vibration. Smaller cutting force and delamination thickness would be produced by the smaller depth of cut, smaller feedrate, or larger tool rotation speed. Smaller indentation depth was generated by larger tool rotation speed or smaller feedrate. Smaller material removal rate and abrasive-grain number taking part in the cutting process were produced by the smaller depth of cut. The delamination initiation at larger uncut CFRP thickness would be induced by higher cutting force.
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Yu, Z., X. Hu, and K. P. Rajurkar. "Study of Micro Ultrasonic Machining of Silicon." In ASME 2005 International Mechanical Engineering Congress and Exposition. ASMEDC, 2005. http://dx.doi.org/10.1115/imece2005-79244.

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As a micro mechanical machining process, micro ultrasonic machining (micro USM) has the major advantage of producing micro-scale components or features in brittle (glass, quartz crystal, and sapphire) and hard (ceramics) materials. Micro USM is used to generate micro holes with 5μm in diameter and 3D micro cavities. However, the relationship of machining parameters such as static load, abrasive particle and amplitude of vibration and the material removal rate is not clearly understood. In this paper, a mathematical model is developed to describe the material removal process in micro USM. Experiments were carried out to verify the model. It was found that the machining speed decreases when the load is over a certain value, which is different from that of theoretical model. To understand this phenomenon, a simple model was proposed to analyze it qualitatively. It was found that the debris accumulation around the crater in a short time is the main reason resulting in the low machining efficiency.
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Zeng, W. M., Z. C. Li, N. J. Churi, Z. J. Pei, and C. Treadwell. "Experimental Investigation Into Rotary Ultrasonic Machining of Alumina." In ASME 2004 International Mechanical Engineering Congress and Exposition. ASMEDC, 2004. http://dx.doi.org/10.1115/imece2004-61700.

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Many experimental studies have been conducted to explore the relations between control variables and process outputs in rotary ultrasonic machining (RUM). However, there are few reports on the comparison between RUM and conventional diamond drilling. In this paper, the cutting force and surface roughness are compared when machining alumina with RUM method and with conventional diamond drilling method. Furthermore, the effects of the control variables (rotational speed, feed rate, and ultrasonic power) on RUM outputs (such as cutting force and surface roughness) are studied. It is found that in comparison with conventional diamond drilling, the cutting force can be reduced significantly and the surface roughness can be improved by using RUM. It is also found that rotational speed, feed rate, and ultrasonic power have significant effects on RUM process.
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Wang, Hui, Fuda Ning, Yingbin Hu, Yuanchen Li, Xinlin Wang, and Weilong Cong. "Edge Trimming of CFRP Composites Using Rotary Ultrasonic Machining: Effects of Ultrasonic Vibration." In ASME 2018 13th International Manufacturing Science and Engineering Conference. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/msec2018-6362.

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Carbon fiber reinforced plastic (CFRP) composites have many excellent properties, which make them be widely used in many applications. After demolding processes, CFRP composites still need additional machining processes to achieve final shape with desired tolerances. Edge trimming is the first machining process performed on composites after their molding processes. Because of carbon fibers’ abrasive properties as well as CFRPs’ properties of inhomogeneity and anisotropy, CFRPs are regarded as the difficult-to-cut materials. Many problems are generated in traditional machining processes. To reduce and solve the problems, edge trimming using rotary ultrasonic machining (RUM) is reported in this manuscript. This paper, for the first time, makes the comparisons on machining performance (cutting forces, torque, and surface roughness) between edge trimming processes with and without ultrasonic vibration assistance. To better understand effects of ultrasonic vibration on such a process, machining mechanisms are also obtained and analyzed. This paper will provide guides for RUM edge trimming of CFRP composites.
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Fernando, Palamandadige K. S. C., Zhijian Pei, Meng (Peter) Zhang, and Xiaoxu Song. "Rotary Ultrasonic Drilling of CFRP: Effect of Process Parameters on Delamination." In ASME 2016 11th International Manufacturing Science and Engineering Conference. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/msec2016-8611.

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Drilling is an essential practice, especially for the aerospace industry. Conventional machining procedures such as twist drilling are not cost effective for hard to machine materials such as titanium, advanced ceramics, carbon fiber reinforced plastics etc. Rotary ultrasonic machining (RUM) is a nontraditional machining process for hard to machine materials. RUM utilizes a rotating, ultrasonically vibrating tool (core drill) feeds into the workpiece to remove the material. Although drilling is the most common machining process for CFRP, delamination is a major problem associated with drilling, because of its heterogeneity and anisotropy. Delamination reduces structural integrity and increases assembly tolerance which leads to rejection of a part or a component. In the air craft industry, rejections caused by delamination accounts for 60% of all rejections in final assembly. This motivates researchers to identify delamination-free techniques to reduce component rejection caused due to delamination. This paper, for the first time, investigates the effects of process parameters on the delamination of CFRP processed by RUM. These process parameters are variable feed rate, variable spindle speed and the use of backing plate.
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Sonate, Abhishek, Dheeraj Vepuri, and Sagil James. "Study of Micro Ultrasonic Machining of CFRP/Ti Stacks." In ASME 2017 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/imece2017-72317.

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Carbon fiber reinforced plastic (CFRP) composite is one of the most sought after material owing to its superior physical and mechanical properties such as high-durability and high strength-to-weight ratio. CFRP composites are often used by stacking up with titanium (Ti) to form multi-layered material stacks for applications involving extreme mechanical loads. However, machining of CFRP/Ti multi-stacks is quite complex and challenging task since both materials are difficult-to-machine materials and show completely different machinability properties. The challenge is further escalated when there is a need to machine CFRP/Ti stacks at micron level. Several problems arise during the machining process due to the non-homogeneous structure, anisotropic and abrasive properties of composite. Traditional methods of micromachining the CFRP/Ti stacks results in several issues including high cutting force and torque and high tool wear, composite delamination, large groove depth in composite, and poor surface quality. Ultrasonic machining (USM) process has been successfully used to machine titanium, CFRP and CFRP/Ti stack at macro scale. Micro Ultrasonic machining is a downsized version of macro ultrasonic machining process that is developed to machine hard and brittle materials. This research explores the possibility of using Micro USM process to conduct micromachining of CFRP/Ti multi stacks. The effect of various process parameters including abrasive grit size, tool material and type on the material removal process is studied. The study found that micro ultrasonic machining process is capable of successfully micromachining CFRP/Ti stacks with zero CFRP delamination, minimal variation in CFRP and Ti hole sizes and longer tool life. Further, a three-dimensional finite element simulation study is performed on micro ultrasonic machining of CFRP/Ti stacks. The simulation results revealed that the workpiece is not subject to any significant normal stresses during the machining process, while variations in shear stresses is seen on the inside surfaces of the machined cavities.
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Dai, Yutang, Bin Liu, Guanglin Yin, Tao Li, and Joseph M. Karanja. "Research on ultrasonic vibration aided femtosecond laser machining process of transparent materials." In International Symposium on Photonics and Optics, edited by Zhiping Zhou. SPIE, 2015. http://dx.doi.org/10.1117/12.2196950.

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