Qualification: 
Ph.D, M.E
t_mohanraj@cb.amrita.edu

Dr. T. Mohanraj currently serves as an Assistant Professor (Sr. Gr.) at the Department of Mechanical Engineering, School of Engineering, Amrita Vishwa Vidyapeetham, Coimbatore. He received B.E., M.E.  and Ph. D. Degrees from Anna University, Chennai.

T. Mohanraj received the “Certified LabVIEW Associate Developer” certification from National Instruments, Bangalore, and received “Best Faculty Award – 2016” from Kongu Engineering College, Erode.

He is an Associate Member of Institution of Engineers (India) –IE(I) and a Member of International Association for Engineers (IAENG).

Research Expertise

Condition Monitoring, Tribology, Robotics & Automation, Control Engineering, Manufacturing Systems, Optimization Techniques, Surface Coatings.

Thrust Area of Research

Robotics and Automation, Manufacturing Systems

Awards and Achievements

  • Received B.E, M.E & Ph.D. Degrees from Anna University, Chennai.
  • Received the "Certified LabVIEW Associate Developer" certification from National Instruments, Bangalore and received "Best faculty award – 2016" from Kongu Engineering College, Erode.

Teaching / Research Interests

  • Mechatronics
  • Industrial Robotics
  • Metrology and Measurements
  • Control Engineering

Funded Projects

  • TNSCST: Development of tool condition monitoring system for milling process using wavelet features and machine learning algorithms (2020-21)
  • UGC – Major Research Project: Wear prediction of multipoint cutting tool using sensor fusion model based on adaptive neuro fuzzy inference system (2015-2018)

Seminar / Workshop / FDP Organized

  • Organized a Seminar on “Engineering in Bio medical Devices” funded by DBT (Rs.25,000.00) on January 8, 2016.
  • Organized a Seminar on “Evolutionary Humanoid Robotics” funded by DST-SERB (Rs.50,000.00), from October 30-31, 2015.
  • Organized a Faculty Development Programme on “Emerging Trends and Advances in Programmable Automation Controllers” funded by AICIE (Rs.5.50 Lakhs) from April 20- May 3, 2015.

List of Ph.D. Students

Current

  • C.Sambathkumar (CB.EN.DMEE20008-FT)

Key Responsibilities at Amrita Vishwa Vidyapeetham

  • NBA/OBE Coordinator
  • Class advisor (2016-2020 (III and IV Year Mech C & 2020-2024 Batch (Mech C)
  • NAAC document consolidation
  • Automation and IoT Lab-incharge

Membership in Professional Bodies

  • Institutions of Engineers (India) - AM 155680-3
  • International Association for Engineers - 140970

Publications

Publication Type: Journal Article

Year of Publication Title

2021

T. Mohanraj, Yerchuru, J., Krishnan, H., Aravind, R. S. Nithin, and Yameni, R., “Development of tool condition monitoring system in end milling process using wavelet features and Hoelder’s exponent with machine learning algorithms”, Measurement, vol. 173, p. 108671, 2021.[Abstract]


An effort was made to monitor the flank wear using wavelet analysis by extracting the Hoelder’s exponent as a feature and using various machine learning algorithms to forecast the tool condition. The test was conducted on a Tungsten carbide insert with selected cutting parameters and the acquired vibration signals were used to develop the prediction model. The wavelet coefficients, Hoelder’s exponent, and statistical features were extracted from the vibration signals. These features were used in machine learning algorithms like SVM, KNN, Kernel Bayes, Multilayer perceptron, and Decision trees to forecast the flank wear. The accuracy of the machining algorithm was analyzed through the confusion matrix and accuracy. The results revealed that HE along with wavelet coefficients performed better than statistical features. From the analysis, it was found that DT and SVM had the highest accuracy of 100% and 99.86% respectively. The performance of the selected ML was verified with benchmarking datasets and proves its accuracy.

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2020

T. Mohanraj, Shankar, S., Rajasekar, R., and Uddin, M. S., “Design, development, calibration, and testing of indigenously developed strain gauge based dynamometer for cutting force measurement in the milling process”, Journal of Mechanical Engineering and Sciences, vol. 14, no. 2, pp. 6594–6609, 2020.[Abstract]


In this work, a milling dynamometer based on strain gauge with an octagonal and square ring was designed and tested. Strain gauges were attached with the mechanical rings to detect the deformation, during the machining process. Wheatstone bridge circuit was equipped with gauges to acquire the strain as voltage owing to the deformation of mechanical rings when machining takes place. The finite element analysis (FEA) was used to identify the location of maximum deformation and stress. The direction of rings and location of gauges were decided to increase the sensitivity and decrease the cross-sensitivity. Then, the cutting force was acquired through NI 6221 M series data acquisition (DAQ) card. The dynamometer had undergone a cycle of tests to verify its static and dynamic characteristics. The metrological characterization was performed according to the calibration procedure based on ISO 376 – 2011 standard. The cutting force was measured with both the dynamometers through milling experiments based on Taguchi’s L9 orthogonal array and the results were recorded. The measured cutting force varied from 300 N to 550 N. The obtained results depicted that low-cost milling dynamometer was reliable to measure the three component machining force. Overall, the square ring based dynamometer provides the better static and dynamic characteristics in terms of linearity, cross-sensitivity (4%), uncertainty (0.054%), and natural frequency (362.41 rev/s).

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2020

S. Raghavendr Prabhu, Ilangkumaran, M., and T. Mohanraj, “3D Printing of automobile spoilers using MCDM techniques”, Materials Testing, vol. 62, pp. 1121–1125, 2020.[Abstract]


The ultimate objective is to evaluate the efficacy of three-dimensional printers (3DP) for manufacturing a rear spoiler for radio-controlled (RC) racing cars. This research work focuses on the development of a multi-critaeria decision making (MCDM) model for selecting a 3DP. The selec-tion process includes multiple adverse criteria such as maximum print volume (E1), speed of operation (E2), minimum thickness (E3), extruder capacity (E4), printer cost (E5) and filament material cost (E6). To reduce this adverse nature of the assessment criteria, the preference selection index (PSI) method is anticipated as an MCDM technique for selecting the most suitable 3DP. In this work, ten alternative printers, Lulzbot TAZ 5 (A1), Ultimaker 2 (A2), Zortrax (A3), Wanhao duplicator 4 (A4), Airwolf 3D AW3D HD2X (A5), Flash forge creator X(A6), Maker-bot replicator original (A7), Delta non-turbo WASP 2040(A8), Artifex duo 2 (A9), UP plus 2 (A10)are considered for the assessment process. From the suggested PSI models, the Wanhao duplicator 4 (A4) has emerged as a suitable 3DP for RC car application.

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2020

A. Kaya Gur, Taskaya, S., Shankar, S., and T. Mohanraj, “FEA of SAW penetration of Ramor 500 steel”, Materials Testing, vol. 62, no. 12, pp. 1192–1198, 2020.[Abstract]


amor500 steel plates are used as a ballistic material due to their greater hardness and strength properties. This steel can be produced with a 2-30mm thickness sheet which may attain 505-590HV hard-ness. In the present work, Ramor500 steel pairs are joined using asubmerged arc welding (SAW) process and taking various parameters into consideration. An austenitic additional wire is used for the welding process which contains Cr, Ni, and Mn. The source model prototype was developed using ANSYS software and considering a time-dependent three dimensional thermal model with source cooling. The highest tensile stress voltage value was determined in the sample applying a constant current of 250A, 25V and 30cm×min-1 welding speed. It was observed that the welding seam width increases as welding tension grows and that welding height and depth increase and decrease more or less in tandem. A ANSYS thermal cooling analysis revealed that welding tension grows with heat transfer which increases 15mm from the maincenter of the welding area

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2020

A. Tamilvanan, Balamurugan, K., T. Mohanraj, Selvakumar, P., and Madhankumar, B., “Parameter optimization of copper nanoparticle synthesis by electrodeposition process using RSM and CS”, Materials Today: Proceedings, 2020.[Abstract]


Now-a-days, more concentration attention has been given for synthesizing of copper (Cu) nanoparticles due to its excellent physical and chemical properties. Different approaches are available to synthesize the Cu nanoparticles. Electrodeposition is an easier and simple approach to synthesize the Cu nanoparticles with high purity. The properties of Cu nanoparticles depend on their synthesis approach and electrolysis process parameters. In this work, response surface methodology (RSM), cuckoo search (CS) algorithm was used to optimize the electrodeposition process parameters like concentration of CuSO4 (4–6 g l−1), electrode potential difference (12–27 V) and electrode distance (3–5 cm) on mean size of Cu nanoparticles. The mean particle size of 21.55 nm was obtained with the electrodeposition parameters of (4 g l−1) CuSO4, (3 cm) electrode distance and (27 V) electrode potential difference. The particle size obtained from the experimental result was 20 nm which was very closer to the predicted result (21.5 nm). The size and morphology of Cu nanoparticle were analyzed by using scanning electron microscope and X-ray diffraction technique.

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2020

C. Moganapriya, Rajasekar, R., P Kumar, S., T. Mohanraj, Gobinath, V. K., and Saravanakumar, J., “Achieving machining effectiveness for AISI 1015 structural steel through coated inserts and grey-fuzzy coupled Taguchi optimization approach”, Structural and Multidisciplinary Optimization, vol. 63, p. 63, 2020.[Abstract]


Multi-objective optimization technique has become an essential step in the selection of cutting parameters. The intension of this research study is to analyze the performance characteristics of coated carbide inserts on their measured output responses during machining AISI 1015 steel. This paper targets to optimize the machining parameters such as speed, cutting depth, feed rate, cutting fluid flow rate, and coating material when multiple responses like surface roughness and flank wear were considered at the same time during turning. This research study also intends to examine scientifically the effect of machining parameters on quality measures during machining structural AISI 1015 steel. Cathodic arc evaporation–coated titanium aluminum nitride (TiAlN), titanium aluminum nitride/tungsten carbide-carbon (TiAlN/WC-C), and uncoated CNC inserts were used for the study. SEM and energy-dispersive X-ray analysis were performed to confirm the presence of coated elements. Micro-hardness was measured for coated, pure inserts, and TiAlN/WC-C-coated tool exhibited a higher hardness of 22.11 GPa compared with pure and coated tools. Five process parameters were used for this study, each at three stages. The experimental design was laid based on Taguchi’s L27 orthogonal array. In this research study, a multi-objective hybrid optimization technique comprising grey relation and fuzzy logic conjugated with the Taguchi design of experiments was used. The process parameters were optimized by grey relation analysis followed by fuzzification using Mamdani fuzzy engine and then optimized through Taguchi analysis. The parameter combination of speed 500 rpm, depth of cut of 1 mm, a feed rate of 0.05 mm/rev, cutting fluid flow rate at high level, and TiAlN/WC-C coating was found to be the optimum input parameters. The confirmatory test was also performed to validate the hybrid optimization approach.

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2020

T. Mohanraj, Deepesh, T., Dhinesh, R., Jayaprakash, S., and S Krishna, S., “Design and analysis of a strain gauge based eight-shaped elliptical ring dynamometer for milling force measurement”, Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science, p. 0954406220967681, 2020.[Abstract]


This study describes the design, analysis, and development of a strain gauge-based dynamometer for measuring the cutting force during the milling process. The objective is to increase the deformation of the ring with an applied load so that it can be measured more easily. Based on the analysis and test results, the eight-shaped (ES) rings with an elliptical hole were finalized. It was shown that the ring has a higher deformation of 0.02822 mm for a normal load and 0.2136 mm for a tangential load. Also, the induced von Mises stress is 39.63 MPa for axial and 194.8 MPa for tangential load, each of which is less than half of the yield strength. Hence, for the finalized design the metallic ring was fabricated, and sensors were bonded. Then, the calibration and metrological characterization was performed. Overall, the designed dynamometer is found as suitable for measuring the cutting force in the milling process.

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2020

T. Mohanraj, Shankar, S., Rajasekar, R., Dr. Sakthivel N.R., and Pramanik, A., “Tool condition monitoring techniques in milling process — a review”, Journal of Materials Research and Technology, vol. 9, pp. 1032 - 1042, 2020.[Abstract]


The most important improvement in metal the cutting industry is the continuous utilization of cutting tools and tool condition monitoring system. In the metal cutting process, the tool condition has to be administered either by operators or by online condition monitoring systems to prevent damage to both machine tools and workpiece. Online tool condition monitoring system is highly essential in modern manufacturing industries for the rising requirements of cost reduction and quality improvement. This paper summaries various monitoring methods for tool condition monitoring in the milling process that have been practiced and described in the literature.

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2020

T. Mohanraj, Suganeswaran, K., Parameshwaran, R., and Meenakshipriya, B., “Process parameter optimization for the magnetic abrasive finishing of SS310s steel”, Materials Testing, vol. 62, no. 2, 2020.[Abstract]


In this work, the MAF set-up is fixed on a vertical milling machine, and experiments are performed for optimizing the process parameters using central composite design (CCD) based on response surface methodology (RSM). From these experiments, output responses like percentage improvement in surface roughness (%ΔRa) and the material removal rate (MRR) are measured. An airgap is maintained in the range of 1.5-2 mm at a voltage of 10-20 V. A series of 62 experiments are conducted using selected process parameters at different levels. A grey based fuzzy algorithm is used to optimize the multi-response characteristics. The grey fuzzy reasoning grade (GFRG) is used to identify the optimal process parameters. From the results, the highest GFRG value is obtained at a voltage of 15 V with a corresponding rotational speed, machining gap, mesh number and mixing ratio of 750 rpm, 1.75 mm, 800 and 1: 2, respectively. In addition, analysis of variance (ANOVA) is used to identify the percentage contribution of each parameter in the MAF process, and the same is verified through experimentation. Optical microscopic images confirm that the surface finish of SS310s has been improved using the MAF process.

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2020

T. Mohanraj, SK, T., and Shankar, S., “Tool wear prediction in hard turning of EN8 steel using cutting force and surface roughness with artificial neural network”, Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Scienc, vol. 234, no. 1, pp. 329-342, 2020.[Abstract]


In this work, the flank wear of the cutting tool is predicted using artificial neural network based on the responses of cutting force and surface roughness. EN8 steel is chosen as a work piece material and turning test is conducted with various levels of speed, feed and depth of cut. Cutting force and surface roughness are measured for both the fresh and dull tool under dry cutting conditions. The tool insert used is CNMG 120408 grade, TiN coated cemented carbide tool. The experiments are conducted based on the response surface methodology face central composite design of experiments. The feed rate (14.52%), depth of cut (27.72%) and the interaction of feed rate and depth of cut (50.39%) influence the cutting force. The feed rate (21.33%) and the interaction of cutting speed and depth of cut (26.67%) influence the flank wear. The feed rate (61.63%) has the significant influence on surface roughness. The feed forward back propagation neural network of 5-n-1 architecture is trained using the algorithms like Levenberg Marquardt, BFGS quasi-Newton, and Gradient Descent with Momentum and Gradient descent with adaptive learning rate. The network performance has been assessed based on their mean square error and computation time. From this analysis, the BFGS quasi-Newton back propagation algorithm produced the least mean squared error value with minimum computation time

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2020

T. Mohanraj, M, A., K., V. K. C., and Vijay, M., “Evaluation of Shoulder Pain Among the Workers Involved in Ironing Process Using Surface Electromyography”, Journal of Medical Imaging and Health Informatics, vol. 10, 1 vol., 2020.[Abstract]


This study focused on the assessment of muscle activities related to shoulder pain among the occupational ironing workers. The activity of the shoulder muscle response was observed as maximum during the ironing activity. The fatigue property was identified using the surface electromyography (sEMG). The structural spots were chosen on the basis of statistical survey and direct observation conducted before the investigation. The muscle activities of trapezius descendens of the right hand, deltoideus medius of the right hand, deltoideus anterior of the right hand, trapezius descendens of the left hand and deltoideus medius of the left hand was recorded by using the sEMG and the muscle activities were investigated for workers involved in ironing of clothes in laundry shops. The investigation reports were collected and processed. The study reports that the musculoskeletal disorder in the shoulder portion is due to the age, repetitive work, working time and iron box weight. The maximum response was observed in the deltoideus medius of the right hand. The age factor found to be the most prevailing symptom among the ironing workers. The aged persons were found to be at high risk due to repetitive task for a prolonged time period of ironing and also the table height influences fatigue. In order to overcome this problem, the workers were suggested to take adequate rest brakes during the ironing process and adjust the table height.

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2019

T. Mohanraj and M, D. Kumar, “The process parameter optimization for grey cast iron in turning process using response surface methodology”, International Journal of Mechanical and Production Engineering Research and Development, vol. 9, pp. 997-1006, 2019.

2019

A. J., ,, T. Mohanraj, and , “The effect of bio-cutting fluids on surface roughness during end milling of A359 aluminium alloy”, International Journal of Mechanical and Production Engineering Research and Development, vol. 9, pp. 987-996, 2019.

2019

P. M. Arunkumar, T. Mohanraj, Ananthi, K., Abbhimanneu, S. J., Aravindh, R., Praveen, T. A., Balaji, S., Dinesh, P. K., and P. Joseph, L., “Optimization of milling parameters using vegetable oil by measuring vibration signal”, International Journal of Innovative Technology and Exploring Engineering, vol. 8, pp. 706-711, 2019.[Abstract]


This paper describes an on-line tool wear monitoring system for milling operation by optimizing the input parameters while machining 7075T6 aluminium composite material. The input parameters considered are Spindle speed, feed rate and depth of cut. Coolant is the major factor that affects the tool wear to greater extent. So the type of coolant (different types of vegetable oils) is also taken as an input parameter for optimization. The experiments are carried out with different spindle speed, feed rate, depth of cut and coolant and the vibration produced in X, Y & Z directions were measured. Taguchi mixed level design (L18) is taken for optimization process using S/N ratio and ANOVA (Analysis Of Variance) analysis. The results show that the coolant has the most significance while measuring the vibration. © BEIESP.

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2019

T. Mohanraj, Tamilarasi, T., Rajasekar, R., Saminathan, K., and Ravichandran, K., “Experimental Investigation on the Influence of Carbon-based Nanoparticle Coating on Heat Transfer Characteristics of the Microprocessor”, Journal of Composite Materials , 2019.

2019

A. SHANMUGAM, KRISHNAMURTHY, K., and T. Mohanraj, “Experimental study of surface roughness and taper angle in abrasive water jet machining of 7075 Aluminium composite using Response Surface Methodology”, Surface Review and Letters (Accepted), vol. 27, no. 3, p. 1950112, 2019.[Abstract]


Surface roughness and taper angle of an abrasive waterjet machined surface of 7075 Aluminum metal matrix composite were deliberately studied. Response surface methodology design of experiments and analysis of variance were used to design the experiments and to identify the effect of process parameters on surface roughness and taper angle. The jet traverse speed and jet pressure were the most significant process parameters which influence the surface roughness and taper angle, respectively. Increasing the pressure and jet traverse speed results in increasing the surface roughness and taper angle. At the same time, decreasing the standoff distance and jet traverse speed possibly enhances both the responses. The optimal process parameters of 1mm as standoff distance, 192MPa as water pressure and 30mmmin−1 as jet traverse speed were identified to obtain the minimum value of surface roughness and taper angle. Based on the optimal parameters, the confirmation test was conducted. The mathematical equation was obtained from the experimental data using regression analysis; it was observed that the error was less than 5% of the experimentally measured values.

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2019

S. Shankar, T. Mohanraj, and Pramanik, A., “Tool Condition Monitoring While Using Vegetable Based Cutting Fluids During Milling of Inconel 625”, Journal of Advanced Manufacturing Systems, vol. 18, no. 4, 2019.

2019

T. Mohanraj, Shankar, S., Rajasekar, R., Deivasigamani, R., and Arunkumar, P. Muthusamy, “Tool condition monitoring in the milling process with vegetable based cutting fluids using vibration signatures”, Materials Testing, vol. 61, no. 3, pp. 282–288, 2019.[Abstract]


The major difficulty faced in a machining process is predicting the failure of cutting tools and analyzing the stipulated time for tool replacement. The former and latter can be achieved through a monitoring system that surveys the effective condi-tion. This present research work is focused on analyzing tool condition by adopting a vibration signature during the ma-chining of a hybrid aluminum alloy composite using various coolants. The experiments were conducted employing various tools under optimum process parameters utilizing vegetable based cutting oil as a coolant. During the machining process, a vibration signature from the workpiece was acquired using an NI 6221 M series DAQ card allowing for various time domain features to be extracted. The arithmetic mean and skewness significantly increased for dull tools. Based on the extracted features, a decision making algorithm for tool condition monitoring system has been proposed. The result shows that the features extracted increased consecutively with an increase in flank wear.

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2019

S. Shankar, T. Mohanraj, and Rajasekar, R., “Prediction of Cutting Tool Wear during Milling Process using Artificial Intelligence Techniques”, International Journal of Computer Integrated Manufacturing, vol. 32, pp. 174-182, 2019.[Abstract]


An efficient tool condition monitoring system was designed for keyway milling of 7075-T6 hybrid aluminium alloy composite with resultant machining force and sound acquired while the milling process. During the milling process, sound pressure and machining force were measured using a microphone and milling tool dynamometer with NI USB 6221 DAQ card and monitored using LabVIEW. The resultant cutting force for fresh and dull tool varies up to 1 kN and 1.8 kN respectively. The sound pressure for fresh, working and dull tool varies up to 1.9 Pa, 2 Pa and 2.5 Pa respectively. The tool condition was estimated from the Artificial Intelligence techniques based on the acquired signals. The acquired signals were given as an input signal to the expert system. The predictor output varies from 0 to 3 to indicate the progression of flank wear and it was utilised to evaluate the tool condition. When the output exceeds the value of 3, it indicates that the tool has to be replaced for the machining process. The Mean Squared Error (MSE) for a feedforward backpropagation neural network and ANFIS model were 2.06517e-9 mm and 0.487505e-3 mm respectively. The neural network had the regression coefficient of 0.99 which shows the accuracy of the model. © 2018, © 2018 Informa UK Limited, trading as Taylor & Francis Group.

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2017

T. Mohanraj and Shankar, S., “Experimental Investigation and Process Parameter Optimization in Milling of 7075 – T6 Hybrid Aluminium Metal Matrix Composite using esponse Surface methodology”, Journal of the Balkan Tribological Association, vol. 23, pp. 124–138, 2017.

2017

T. Mohanraj, Shankar, S., and Ponappa, K., “Influence of Vegetable Based Cutting Fluids on Cutting Force and Vibration Signature During Milling of Aluminium Metal Matrix Composites”, Jurnal Tribologi, vol. 12, pp. 1-17, 2017.[Abstract]


Due to the environmental and health issues, there is an enormous requirement for developing the novel
cutting fluids (CFs). The vegetable based cutting fluid (VBCFs) doesn’t affect the environment, diminish
the harmful effects to the operator and also enhance the machining performances such as surface roughness,
tool life, minimum vibration and cutting forces. In this work, the performances of four different VBCFs
like palm, coconut, sunflower, soya bean oils, and a commercial type of CFs were considered to analyze the
influence of cutting fluids while measuring the cutting force and vibration signatures during milling of
7075–T6 hybrid aluminium metal matrix composite with carbide insert tool. The experiments were
conducted in CNC L-MILL 55 vertical machining center, with milling tool dynamometer to measure the
cutting force and a tri-axial accelerometer to measure the vibration signals. The flow rate of the VBCFs
were maintained at a constant rate and the results were compared with a commercial cutting fluid. The
obtained result shows that palm oil suits better than the other vegetable based cutting fluids in terms of
minimum cutting force requirement and minimum vibration. Also, the experimental result shows that the
cutting fluid was one of the important parameter needs to be considered which influences the cutting force
and vibration signals.

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2016

T. Mohanraj, Shankar, S., and Thangarasu, S. K., “Multi-Response Milling Process Optimization using the Taguchi Method Coupled to Grey Relational Analysis”, Materials Testing, vol. 58, no. 5, pp. 462-470, 2016.[Abstract]


An efficient method based on Taguchi's design of experiment coupled with the grey relational analysis was studied, concentrating on the optimization of process parameters over surface roughness, cutting force and tool wear rate in milling of mild steel. This study consists of three stages: experimental work, single response optimization using Taguchi's S/N value and multi-response optimization using grey relational analysis. In the first stage, the experimental work was carried out using Taguchi's design of experiments. The effects of process parameters (spindle speed, feed rate and depth of cut) on surface roughness, cutting force and tool wear rate were investigated using analysis of variance. In the second stage, Taguchi's signal-to-noise ratio was used to optimize the responses. Finally, multi-response optimization was carried out using grey relational analysis. Additionally, the analysis of variance (ANOVA) was applied to determine the most significant factor for the optimal response for milling of mild steel. From the ANOVA table, the most significant factor is the spindle speed. This proposed method can be an effective approach to enhance the multi-response optimization for milling process.

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2015

T. Mohanraj, Saravanan, B., and Ameen, M. Al, “Optimization of Process Parameter for Surface Roughness in Milling Process using Response Surface Methodology”, IOSRD International Journal of Engineering, vol. 2, no. 2, pp. 11-16, 2015.

2015

T. Mohanraj, S., S., Thangarasu, S. K., and Pravien, D. S., “Prediction of Cutting Force in Turning Process: An Experimental and Fuzzy Approach”, Journal of Intelligent & Fuzzy Systems, vol. 28, no. 4, pp. 1785-1793, 2015.[Abstract]


This paper presents a comparison of experimental results and a fuzzy rule based system model for calculating the cutting force in the turning operation. A full bridge dynamometer was used to measure the cutting forces over the mild steel work piece and Cemented Carbide Insert tool for different combinations of cutting velocity, feed rate and depth of cut. The rake angle, approach angle and nose radius of the cutting tool insert is kept constant throughout the experiment. This fuzzy model consists of 27 rules and Mamdani Max-min inference mechanism was used. The Taguchi designs of experiments were used to determine the number of experiments. Also, an attempt had been made to analyze the influence of the parameters using the regression analysis which yields a maximum error of 3.214% at the time of prediction which was smaller. The experiments are planned based on Taguchi's design and the measured cutting forces were compared with the predicted forces in order to validate the feasibility of the proposed design. The percentage contribution of each process parameter had been analyzed using Analysis of Variance (ANOVA). Experimental results were compared with the regression analysis and predicted fuzzy model. The difference between experimental and predicted results was obtained as around 98.84%.

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2014

T. Mohanraj, Arunkumar, S., Raghunath, M., and Anand, M., “Mobile Robot Path Planning using Ant Colony Optimization”, International Journal of Research in Engineering and Technology, vol. 3, no. 11, pp. 1-16, 2014.[Abstract]


Currently Mobile Robot has been widely used in examination and navigation particularly where static and unknown surroundings are involved. Path planning is a crucial problem in mobile robotics. Path planning of robot refers to the determination of a path, a robot takes in order to carry out the necessary task with a given set of key parameters. To find best possible path from starting point to target point, that reduces time and distance, in a given environment, avoiding collision with obstacles is a current potential research area. This paper presents SACO and ACO-MH algorithm to solve the problem of mobile robot path planning such that to reach the target station from source station without collision. The SACO and ACO-MH algorithm will give the collision free optimal path. The result obtained with ACO-MH was compared with SACO. The mobile robot environment is treated as a grid based environment in which each grid can be represented by an ordered pair of row number and column number. The mobile robot is considered as a point in the environment, to reduce the computational complexities. The ACO-MH results show better convergence speed and reduction in computational time than that of SACO through multiple MATLAB experiments.

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2009

S. C. M. Amie and T. Mohanraj, “Automation and Emerging Technology Development of 2d Seed Sowing Robo”, Journal of Agricultural Science (Toronto), vol. 1, no. 1, pp. 33-52, 2009.[Abstract]


In the current scenario most of the countries do not have sufficient skilled manpower specifically in agricultural sector and it affects the growth of developing countries. So it’s a time to automate the sector to overcome this problem. An innovative idea of our project is to automate the process of sowing crops such as sunflower, baby corn, groundnut and vegetables like beans, lady’s finger, pumpkin and pulses like black gram, green gram etc to reduce the human effort and increase the yield. The plantations of seeds are automatically done by using DC motor. The distance between the two seeds are controlled and varied by using Microcontroller. It is also possible to cultivate different kinds of seeds with different distance. When the Robo reaches the end of the field we can change the direction with the help of remote switches. The whole process is controlled by Microcontroller.

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Publication Type: Conference Paper

Year of Publication Title

2021

S. Punniyawarthana and T. Mohanraj, “Design and Analysis of Two-Link Discrete Flexible Manipulator”, in IOP Conference Series: Materials Science and Engineering, 2021.[Abstract]


Proposed two-link flexible manipulators suit the requirement of larger work volume than the traditional flexible manipulators and handle high payloads equal to that of rigid manipulators. The simulation was performed on the Computer-Aided Design (CAD) model of the Motoman HC-10DT, a Human-Collaborative robot. During the analysis, one link of the manipulator was modified as a flexible manipulator for which static and modal analysis was done and compared the results with the actual link of the robot to validate the proposed design. The kinematic analysis was also done to find the reach of the modified robot. Total deformation on both the flexible manipulator and the actual link of the robot was 0.2mm but the maximum von Mises stress acting on the flexible manipulator was 2.97% lesser than that of the rigid link of the robot. Eventually, the safety factor of the flexible manipulator was higher compared to the rigid link. The factor of safety of the upper link is 1.41 and the lower link is 1.51 whereas the actual link of the robot has the safety factor of 1.30.

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2017

T. Mohanraj, Shankar, S., Rajasekar, R., Dhamodharan,, and Aravindh, A., “Experimental Analysis and Process Parameter Optimization in Milling of AISI 304 Austenitic Stainless Steel Sing Response Surface Methodology”, 2017.

Publication Type: Book Chapter

Year of Publication Title

2020

A. P. M. and T. Mohanraj, “Tool Condition Monitoring system for Milling process By Measuring Vibration Signature”, in Tool Condition Monitoring system for Milling process By Measuring Vibration Signature, 2020.[Abstract]


Online monitoring of the condition of a cutting tool was still a challenging task which requires much attention to reduce the productivity loss. In this book, the work about online condition monitoring of a multi point cutting tool using the vibration signatures during machining of 7075-T6 Hybrid aluminum composite alloy is discussed.Cutting fluid also has significant effect on tool wear. So different vegetable based cutting fluid was chosen for experimentation.The optimized process parameter(Spindle speed, Feed rate and Depth of cut) along with type of vegetable based cutting fluid was found for minimum vibration in milling process.

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2020

Sakthivel R., T. Mohanraj, S., J. John Marsh, and P., B., “Emission Aspects of Biomass-Based Advanced Second Generation Bio-Fuels in IC Engines”, in Recent Technologies for Enhancing Performance and Reducing Emissions in Diesel Engines, 2020.[Abstract]


Rapid industrialization and growth in population in urban regions augment the pollution levels from transportation sectors, especially from diesel fleets. A wide array of research activities were carried out to satisfy the energy needs as well as reduce the emission levels, which poses a big challenge to the research community. In this situation, biomass-derived fuels provide a ray of hope to the research community to address the emission problem by adapting closed carbon cycle at low cost. This chapter gives an overview to the readers about the present energy scenario, biomass-based fuel, upgradation techniques for biomass fuel, and engine adaptability of biomass-based fuels. This chapter provides a clear glimpse of biomass energy, one of the potential energy resources in the near future.

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Publication Type: Conference Proceedings

Year of Publication Title

2017

T. Mohanraj, Sathishranganathan, C., Rajasekar, R., Saravanan, N., and Maheshkumar, K. V., “Investigation on Mechanical Properties of Aluminium 6063 with Basalt Powder”, International Conference on Nanotechnology:Ideas, Innovations and initiatives - 2017. IIT Roorkee, 2017.

2017

S. .Shankar and T. Mohanraj, “Experimental Analysis and Process Parameter Optimization in Milling of Inconel 625 using Response Surface Methodology”, International Conference on Manufacturing Technology and Simulation 2017. IIT Madras, 2017.

2016

T. Mohanraj, .Shankar, S., .Rajasekar, R., and .M.Arunkumar, P., “Optimization of Process Parameters using Taguchi's DOE for Cutting Force in Milling of 7075-T6 Composite Aluminium Alloy”, International conference on Sustainable Materials design and applications ICSMDA 2016. Kongu Engineering College, 2016.

2016

T. Mohanraj, .Saravanan, B., M. Asfar, M., and .G.Sastikumar, T., “Automatic Pineapple Peeler”, International Conference on Advanced Engineering and technology for sustainable development, ICAETSD 2016. 2016.

2016

T. Mohanraj, .Shankar, S., .Saravanan, B., and .G.Sastikumar, T., “Design, Development and Testing of a Strain Gauge Based Milling Dynamometer for Measurement of Cutting Force”, International Conference on Materials, Design and Manufacturing Process, ICMDM ‘16. Anna University, Chennai , 2016.

2016

T. Mohanraj, .Arunkumar, S., ameen, J. Mal, Kumar, J. A., and .Janarthanan, G., “Intelligent Motorisd Shopping Droit”, International Conference on Advances in Materials and Manufacturing - INTCOMM 2016. Hindusthan College of Engineering and Technology, Coimbatore, 2016.

2016

T. Mohanraj, Rajasekar, D. R., and .M.Arunkumar, P., “Influence of Bio-oils as Cutting Fluid in Tool Wear Prediction for Milling Operation”, International Conference on Advances in Materials and Manufacturing - INTCOMM 2016. Hindusthan College of Engineering and Technology, Coimbatore, 2016.

2016

T. Mohanraj and .Saravanan, B., “Throughput Time Reduction in OHT (Off Highway Trucks) Main Assembly line Through Fixture and Modularity”, International Conference on Applied Mathematical Models. PSG College of Technology, Coimbatore, 2016.

2015

T. Mohanraj and .Saravanan, B., “Automatic Pesticide Spraying Machine”, International Conference on Mathematical Computer Engineering ICMCE 2015. VIT University, Chennai, 2015.

2015

T. Mohanraj and Saravanan, B., “Design and Fabrication of Automatic Dhoop Making Machine”, International Conference on Modern, Intelligent and Green Manufacturing. Erode Sengundhar Engineering College, Erode, 2015.

2015

T. Mohanraj and S.Shankar, 4., “Tool Condition Monitoring in Milling using Sensor Fusion Technique”, Malaysian International Tribology Conference. 2015.

2014

T. Mohanraj, .Shankar, S., and .Eswararaj, S., “Optimization of Process Parameters for Surface Roughness in Milling based on Response Surface Methodology”, International Conference on Advances in Mechanical and Mechatronics Engineering. Sri Krishna College of Engineering and Technology Coimbatore, 2014.

2014

T. Mohanraj, .MuthuKrishnan, A., C. Kumar, N., and Prasannababu, R., “Thermo Mechanical Analysis of Single Point Cutting Tool using Fem Approach”, International Conference on Advances in Mechanical and Mechatronics Engineering. Sri Krishna College of Engineering and Technology Coimbatore, 2014.

2014

T. Mohanraj, .Anandakumar, P., .K.Boopathi, M., and .Elango, B., “Some Studies on Mobile Robot Path Planning – A Review”, International Conference on Advances in Mechanical and Mechatronics Engineering. Sri Krishna College of Engineering and Technology Coimbatore, 2014.