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Magadum, Sunil
- Multi Responsive Parametric Optimization for the Micromachining of AISI3415 Steel using Femtosecond Laser
Abstract Views :189 |
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Authors
Affiliations
1 Dept. of Mech. Engg., NITK, Surathkal, IN
2 Central Manufacturing Technology Institute (CMTI), Bangalore, IN
1 Dept. of Mech. Engg., NITK, Surathkal, IN
2 Central Manufacturing Technology Institute (CMTI), Bangalore, IN
Source
Manufacturing Technology Today, Vol 15, No 9 (2016), Pagination: 3-8Abstract
Femtosecond laser micromachining of rectangular grooves on AISI3415 steel is investigated at 150 fs pulse duration and at a wavelength of 775nm. In the present work, Laser process parameters such as spot size, feed rate and number of passes are optimized considering the multiple responses such as surface roughness (Ra) and depth of groove based on orthogonal array with grey relational analysis. A grey relational grade is calculated using grey analysis and process parameters are optimized based on signal to noise ratio. To validate the experimental result, verification test is performed. Experimental outcomes have proved that the responses in femtosecond laser micromachining can be enhanced efficiently through this approach.Keywords
Femtosecond Laser, Micromachining, Laser Spot Size, Taguchi Grey Relational Analysis.
- Excimer Laser Applications in Micromachining
Abstract Views :179 |
PDF Views:1
Authors
Affiliations
1 Central Manufacturing Technology Institute (CMTI), Tumkur Road, Bengaluru, IN
2 Ultra Precision Engineering Dept, Central Manufacturing Technology Institute (CMTI), Tumkur Road, Bengaluru, IN
1 Central Manufacturing Technology Institute (CMTI), Tumkur Road, Bengaluru, IN
2 Ultra Precision Engineering Dept, Central Manufacturing Technology Institute (CMTI), Tumkur Road, Bengaluru, IN
Source
Manufacturing Technology Today, Vol 15, No 1 (2016), Pagination: 12-18Abstract
Since its invention in 1960, laser has been widely used in many fields, such as scientific research, medical treatment, industry and military. Excimer lasers are an important family of gas lasers that were firstly commercialized in the 1970s. The most common excimer lasers use rare-gas monohalides such as KrF, ArF & XeCl and have a wavelength in ultraviolet (UV) range. The applications of excimer laser are very broad with new applications continuously coming out. This paper addresses novel applications of an excimer laser (248 nm & 193 nm wavelength, 20 ns pulse duration) in micromachining.Keywords
Excimer Laser, Micromachining, MEMS, HAZ.- Effect of Cryogenic Cooling in Turning Ss304 Using Coated Carbide at High Cutting Speeds
Abstract Views :148 |
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Authors
Affiliations
1 Central Manufacturing Technology Institute, Bangalore-560022, IN
1 Central Manufacturing Technology Institute, Bangalore-560022, IN
Source
Manufacturing Technology Today, Vol 13, No 6 (2014), Pagination: 16-19Abstract
In the present work machining of SS304 was carried out on a lathe using coated carbide tool at high cutting speeds. The effect of cryogenic cooling on tool life and cutting forces were analyzed and compared with conventional flood coolant. Tests were carried out at cutting speed of 200 and 250 m/min, and the feed rate, depth of cut were kept constant at 0.2 mm/rev and 1.5 mm respectively. Coated carbide CNMG 120404 Insert was used as a cutting tool. The results have revealed that cryogenic machining has yielded better tool life as compared to conventional flood machining.Keywords
Cryogenic Machining, Tool Life, Cutting Forces, Coated Carbide Tool.- Development of High Precision Glass Scale Gratings Using Ultra Fast Pulsed Laser
Abstract Views :156 |
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Authors
Affiliations
1 Central Manufacturing Technology Institute (CMTI), Bengaluru, Karnataka, IN
1 Central Manufacturing Technology Institute (CMTI), Bengaluru, Karnataka, IN
Source
Manufacturing Technology Today, Vol 17, No 1 (2018), Pagination: 3-6Abstract
Standard glass scale is just like a kind of very precise ruler and on its surface, accurate divisions are equally marked. The standard glass scales are frequently used in calibration of precise instruments with non contact method of measurements like optical microscopes, video microscopes, profile projectors etc. With the help of ultra fast pulsed laser micromachining system devised a state of the art process for manufacturing standard glass scales. The machined standard scales were calibrated using F25 CMM for 10 mm range scale and Profile projector for 150 mm range scale. The results of the calibration shows the accuracy of the Glass scales at par with the scales manufactured by photolithography process.Keywords
Standard Glass Scale, Gratings, Stage Micrometers, Ultra Fast Pulsed Laser.- Effect of Excimer Laser Parameters on the Ablation Depth During Micromachining of Polycarbonate
Abstract Views :174 |
PDF Views:0
Authors
Affiliations
1 Karunya Institute of Technology, Coimbatore, IN
2 Scientist-C, Central Manufacturing Technology Institute( CMTI), Bengaluru, IN
1 Karunya Institute of Technology, Coimbatore, IN
2 Scientist-C, Central Manufacturing Technology Institute( CMTI), Bengaluru, IN
Source
Manufacturing Technology Today, Vol 18, No SP 3 (2019), Pagination: 58-61Abstract
Polycarbonate (PC) material widely used in micro pumps & micro valves. In machining of PC using Excimer laser ablation rate is one of the important factors in achieving desired features. In the present work, micromachining of Polycarbonate (PC) was carried out using KrF excimer laser of 248 nm wavelength. A micro- hole of Ø150μm was machined on PC substrate during the experimentation. The PC substrates were exposed to a different number of pulses (1-100) at repetition rates of 2-10 Hz respectively by keeping the pulse energy unchanged at 100mJ. The effect of pulse repetition rate and a number of pulses on ablation depth has been investigated in the current work.Keywords
Micromachining, Excimer Laser, Polycarbonate, Ablation Depth, Pulse Repetition Rate, Number of Pulses.References
- Heng Qi, TaoChen, LiyingYao, TiechuanZuo (2008). Micromachining of micro channel on the polycarbonate substrate with co2 laser direct writing ablation.
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- Toshio Mimura, Kouji Kakizaki, Hiroaki Oizumi, Masakazu Kobayashi (2017). High power DUV lasers for material processing 323-8558
- Junichi Fujimotoa, Masakazu Kobayashia, Koji Kakizakia, Hiroaki Oizumia (2017). 248nm high power laser for the micro and macro material processing
- A Brief Review on Laser Surface Texturing of Biomaterials for Cell Culture Applications
Abstract Views :288 |
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Authors
Affiliations
1 Indian Institute of Technology Tirupati, Tirupati, IN
2 Central Manufacturing Technology Institute, Bengaluru, IN
1 Indian Institute of Technology Tirupati, Tirupati, IN
2 Central Manufacturing Technology Institute, Bengaluru, IN
Source
Manufacturing Technology Today, Vol 19, No 9 (2020), Pagination: 8-12Abstract
Cell culture is the process of removing cells from the organisms and growing in vitro conditions. In contrast to cell culture on a petri dish, cell culture on textured surfaces provides an environment similar to in vivo conditions for testing pharmacokinetics and pharmacodynamics effects of drugs. Here, the effect of laser texturing on the cell culture of different cells is studied. Laser induced periodic surface structures (LIPSS) are produced on biomaterials using laser micro processing, which improves the adhesion of cells on the surface of the biomaterial, shows cells align to the textures and get oriented in a particular direction. Ultrashort pulse lasers are used to produce these LIPSS in orders of several nanometers to a few micrometers.Keywords
Contact Angle, Micropatterns, Cell Adhesion, Cell Growth.- Review on Surface Modification of Microelectrode Array for Extracellular Recording of the Neural Interface System
Abstract Views :104 |
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Authors
Affiliations
1 Central Manufacturing Technology Institute, Bengaluru, Karnataka, IN
1 Central Manufacturing Technology Institute, Bengaluru, Karnataka, IN
Source
Manufacturing Technology Today, Vol 21, No 1-2 (2022), Pagination: 3-20Abstract
Globally neurological diseases are increasing due to unhealthy lifestyles, environmental influences, and physical injuries. So, MEA (microelectrode array) based neural interface systems can restore the lost neural functions to treat neurological diseases through stimulating or recording a neuronal signal. In 1664 Jan Swammerdam was the first to explain nerve function and nerve stimulation. Nowadays, many neural recording systems are available for interfacing with the brain. These systems can be classified into two ways: intracellular or extracellular recording. The extracellular recording is the technique of recording or stimulating the neural signals by placing the electrode near the tissues or cells. It is a less invasive approach compared to an intracellular recording. Generally, the neural interface systems are classified as the CNS (central nervous system) and PNS (peripheral nervous system). Microelectrode arrays can interface in the central nervous system to treat neurological diseases. A mechanical mismatch is a significant problem that arises during the insertion of the implant into the brain tissue. So, various surface modification techniques are considered a viable solution among researchers to address this issue. Also, laser and EDM-based new fabrication techniques are getting more attention over photolithography techniques for reducing the fabrication timing, cost, and usage of hazardous chemicals.Keywords
Microelectrode Array, Neural Interface Systems, Laser and EDM Fabrication Techniques, Surface Modification.References
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