BISWANATH DOLOI - Academia.edu (original) (raw)
Papers by BISWANATH DOLOI
Lecture Notes on Multidisciplinary Industrial Engineering, 2018
Laser surface texturing is one of the key technologies in micromachining domain for generating de... more Laser surface texturing is one of the key technologies in micromachining domain for generating defined surface features in micro-components in recent times. In this process, highly focused laser beam is irradiated on the material surface and laser scanning is carried out at different scanning patterns to alter surface conditions for improving the tribological properties of that surface. In this research study, an attempt has been made to carry out laser surface texturing on pure titanium material having a thickness of 1 mm with the aid of a pulsed Nd:YAG laser system. The various process parameters considered for the present research works are laser beam average power, pulse frequency, laser beam scanning speed, and transverse feed. Utilizing response surface methodology, experimentation has been planned. The responses measured are surface roughness, Ra and Rz in lateral and transverse directions and contact angle (θ). The chapter also highlights experimental results for validation of the developed empirical models. The test results have been analyzed using various surface plots. Multi-performance optimization has been conducted to obtain minimum values of surface roughness and contact angle. Using optical microscopic images, influence of process parameters on responses have also been discussed.
Micro ultrasonic machining is the process for micro hole drilling on hard and brittle materials l... more Micro ultrasonic machining is the process for micro hole drilling on hard and brittle materials like ceramic, glass, quartz, silicon, etc. Quartz has wide applications in microelectromechanical systems (MEMS), lenses, pressure and flow sensors, and micro-optical systems. In the present research work, optimization of the process parameters for responses such as material removal rate, overcut, and taper angle during micro ultrasonic drilling has been performed utilizing the developed empirical relationship between the responses and process parameters. Three different process parameters— power rating, abrasive slurry concentration, and tool feed rate were considered for this experimental investigation. The parametric studies have also been made based on response surface plot. Based on multi-objective optimization, optimal parametric setting for maximum material removal rate, minimum overcut and minimum taper angle have been obtained.
One of the newly developed laser micromachining processes for generating micro-turn surface on cy... more One of the newly developed laser micromachining processes for generating micro-turn surface on cylindrical work sample is laser micro-turning process. To explore the capability of this laser micromachining process for achieving particular surface profile and dimensional accuracy of machined parts, authors considered a number of experimental investigation to find the effect of process parameters. During investigation and analysis, a number of experimental designs are applied to in-depth analyse the effect of process parameters on surface roughness (Ra and Rz) and depth deviation. The governing equations of spot and circumferential overlap were developed for investigating the effect of these overlaps on surface criteria. By adopting statistical design of experiments approaches such as Response Surface Methodology, the influence of process parameters on process performance were studied. Moreover, novel machining strategy of laser defocusing condition was also implemented for improving ...
Laser micromachining technology finds great potentials for successful application in the area of ... more Laser micromachining technology finds great potentials for successful application in the area of high precision micro-engineering. Laser micro-turning process is one of the new and emerging technologies in the area of laser material processing (LMP) of engineering materials. Laser micro-turning process is one of the latest promising laser material processing techniques which can be employed for generation of micro-turning surface of particular surface profile and dimensional accuracy on cylindrical workpiece. The present paper addresses the laser micro-turning process of cylindrical shaped 99% pure aluminium oxide (Al2O3) ceramics of size 10 mm in diameter and 40 mm in length. The experiments have been conducted utilizing one factor at a time (OFAT) experimental scheme. The targated depth was set at 100 µm. Laser average power, pulse frequency, workpiece rotating speed and Y feed rate were considered as process variables. After each experiment, surface roughness (Ra and Rt) has been...
Modern Machining Technology
Advanced materials are not easy to machine due to technological and industrial development and wh... more Advanced materials are not easy to machine due to technological and industrial development and which discover extensive applications in nuclear engineering, aviation industries, etc. The manufacture of complex shape with high-quality surface finish and superior accurateness can be easily obtained by nonconventional machining processes. This manuscript covers the significant issues about the performance improvement of ultrasonic micromachining process. This book chapter also focuses on accuracy of ultrasonic micromachining process with process development. The two types of ultrasonic micromachining processes, i.e., stationary USM and rotary USM, are also discussed. Novel development for accuracy on ultrasonic micromachining (USMM) process has been emphasized and discussed. Strategies for development of ultrasonic micromachining system for performance enhancement are discussed for both stationary and rotary ultrasonic micromachining in this chapter. Micro-type tools developments for u...
Hybrid Machining Processes (HMP) consist of two different types of machining processes which are ... more Hybrid Machining Processes (HMP) consist of two different types of machining processes which are applied at the same time in the machining zone. These processes are applied for machining of various advanced materials of complex shapes and sizes. One of the important HMP is Laser Assisted Jet Electrochemical Machining (LAJECM) where a laser beam of low power and a jet of electrolyte are coaxially focused through a nozzle on a particular machine zone. Thus it eliminates the stray machining effect of ECM process. Machining zone temperature as well as electrolyte current density is increased by laser. Thus electrochemical dissolution rate and MRR are increased. In this process, jet of electrolyte is used as tool which eliminates the complex tool design problem of stand-alone ECM process. Laser assistance in ECM process improves precision, accuracy, surface quality and also productivity. Various researchers have performed their research work on LAJECM. This article focuses on various asp...
In the present research work, an analysis of fiber laser percussion micro-drilling of quartz is c... more In the present research work, an analysis of fiber laser percussion micro-drilling of quartz is conducted in order to find out the effect of the process parameters on the entry diameter of micro-hole. A response surface methodology-based experimental design planned and experiments have been conducted for the analysis. The considered process parameters are laser power, pulse frequency, duty cycle, and air pressure. The experimental results reveal that a target value of the micro-hole diameter of 100 µm is generated with the combinations of pulse frequency of 52.05 kHz, duty cycle of 69.47%, laser power of 34.25 W, and air pressure of 1.50 kgf/cm2.
Electrochemical micromachining (EMM) is widely used for micromachining applications due to its va... more Electrochemical micromachining (EMM) is widely used for micromachining applications due to its various benefits over other micromachining methods. Microtool is the vital element in EMM, since the features of the microtool like shape, size and surface finish are directly transferred to the work surfaces affecting its machining accuracy and surface quality. Disc shaped microtools are useful to improve the machining accuracy in terms of reduced overcut, taper angle and stray current effects in EMM. Disc microtools fabricated by different machining techniques needs separate machine setup and includes microtool handling, increasing the risk of microtool damage. This paper presents the micro machining techniques to fabricate the disc shaped microtools of different shank diameters, disc diameters and different disc heights with improved surface quality as required for micromachining applications, from tungsten microrod by EMM. Finally, disc shaped microtool of disc �175 µm, disc height 70 ...
The objective of this article is to exploitrelative machine utilization percentage and machine ut... more The objective of this article is to exploitrelative machine utilization percentage and machine utilization while designing efficient manufacturing cells in Cellular manufacturing (CM). This production factorsare rarely been utilized collectively while designing efficient cells in past CM literature. The proposed model not only minimizes the material handling cost but also maximizes the machine usage in a cell.A novel performance measure termed as Reformed Grouping Efficiency (RGE)is also introduced to verify the goodness of the achieved solutions. The proposed technique can be substantially handy to the production or operational personnel who are believed to decide the appropriate cell configuration on shop-floor.
Rotary ultrasonic machining (RUM) is an abrasive based advanced machining technique for cutting a... more Rotary ultrasonic machining (RUM) is an abrasive based advanced machining technique for cutting and finishing of various hard and fragile materials like ceramic, ceramics composite, glass, titanium and its alloy etc. RUM is the development over stationary ultrasonic machining for enhancement of MRR, geometrical accuracy and surface roughness. The basic mechanism of RUM is the combination of ultrasonic machining and conventional diamond grinding. In this chapter development, principle, mechanism, setup details of rotary ultrasonic machining has been discussed. It also highlights the effects of diverse input parameters on performance of RUM. The MRR always increases with spindle speed; tool feed rate and ultrasonic power. The surface roughness improved with spindle speed but worse with tool feed rate and ultrasonic power. The chipping size reduced with spindle speed but increase with tool feed rate and ultrasonic power. The cutting force reduces with spindle speed and ultrasonic power...
Titanium alloy plays a significant role in the advancement of engineering in the area of advanced... more Titanium alloy plays a significant role in the advancement of engineering in the area of advanced structures and technologies for aerospace and power industry, medicine, automatics and mechatronics, and measurement equipment, owing to its unique combination of physical, chemical and mechanical such as high strength and stiffness at elevated temperatures , high corrosion resistance, fatigue resistance, high strength to weight ratio and ability to withstand moderately high temperatures without creeping. The conventional cutting methods not only face difficulties for cutting these alloys due to their poor thermal conductivity, low elastic modulus and high chemical affinity at elevated temperatures but also undergo from higher cost associated with the machining of Ti-6Al-4V caused by lower cutting speeds and shorter tool life. The application of micro-grooves on Ti-6Al4V predominantly lies in the biomedical devices and the implantation into the bone which further needs to be integrated ...
In the present days, the requirement of micro-machining has seen a rapid growth for the fabricati... more In the present days, the requirement of micro-machining has seen a rapid growth for the fabrication of precision machining of complex parts in automobile, shipbuilding, aerospace, electronics, medical industries, etc. Surface finish of these types of components is one of the most important criteria for fabricating better quality and to avoid failure caused by surface defects. The paper addresses the experimental investigation for the variation of surface roughness of micro-channel milling on flat zirconia (ZrO2) ceramics by using a pulsed fiber laser system. In this work, considered parameters are laser power, pulse frequency, laser scan speed, and the number of scan while responses considered are surface roughness parameters, i.e., Ra and Rz. The experimental results show that aforesaid factors revealed huge influences on surface finish criteria on machined micro-channel on zirconia ceramics.
Recently, laser micromachining and micro-fabrication processes have remarkable and diversified ap... more Recently, laser micromachining and micro-fabrication processes have remarkable and diversified applications in the direction to manufacture highly precised and accurate dimensional parts or components which are used in bio as well as technological domains such as biomedical, dental and orthopaedic, aircraft engines, micro-electromechanical systems (MEMS), electronic devices, turbocharger rotor parts and nuclear reactors. The present chapter deals with experimental investigation into micro-turning process using pulsed Nd:YAG laser during machining of aluminium oxide ceramics. A number of experimental schemes were adopted to explore the parametric influences on process characteristics such as surface roughness and depth deviation. Experimental investigation was also carried out to improve the dimensional accuracy and surface characteristics of laser micro-turned components using laser defocusing technique.
An attempt has been made to investigate the machinability of zirconia toughened alumina (ZTA) ins... more An attempt has been made to investigate the machinability of zirconia toughened alumina (ZTA) inserts while turning AISI 4340 steel. The insert was prepared by powder metallurgy process route and the machining experiments were performed based on Response Surface Methodology (RSM) design called Central Composite Design (CCD). The mathematical model of flank wear, cutting force and surface roughness have been developed using second order regression analysis. The adequacy of model has been carried out based on Analysis of variance (ANOVA) techniques. It can be concluded that cutting speed and feed rate are the two most influential factor for flank wear and cutting force prediction. For surface roughness determination, the cutting speed & depth of cut both have significant contribution. Key parameters effect on each response has also been presented in graphical contours for choosing the operating parameter preciously. 83% desirability level has been achieved using this optimized conditi...
Hard and fragile materials for example ceramics, glass and quartz crystals are getting extra cons... more Hard and fragile materials for example ceramics, glass and quartz crystals are getting extra consideration in modern years owing to their higher characteristics for example high strength, high hardness, chemical durability and low density. Ultrasonic machining is an abrasive based advanced machining with non-chemical, non-electrical and non-thermal process that is particularly suitable for those brittle and hard materials. The USM process principle, mechanism of material removal, varieties of USM set up, tool development of USM process, improvement and production of 3d profile by USM process and various research issues are studied and summarized in this chapter. It also highlights the effects of different parameters of USM process on performance and development of USM process.
Within the domain of austenitic stainless steel, 316 L stainless steel is widely used in both bio... more Within the domain of austenitic stainless steel, 316 L stainless steel is widely used in both biomedical and automotive industries due to its superior mechanical properties. In the present research study, the performance of the fiber laser micro-grooving process with regard to kerf width and surface roughness Ra has been analyzed. The process parameters, i.e., laser power (7.5–20 W), pulse frequency (55–80 kHz), and cutting speed (0.5–3 mm/s) are considered to examine the aforesaid responses. The results of the experiments exhibit that the presence of flowing condition of the high-pressure assist air in combination with varying aforesaid process parameters, have a considerable effect on the kerf width characteristics along with the average surface roughness Ra of microgroove cut on 316 L stainless steel.
Lecture Notes on Multidisciplinary Industrial Engineering, 2018
Laser surface texturing is one of the key technologies in micromachining domain for generating de... more Laser surface texturing is one of the key technologies in micromachining domain for generating defined surface features in micro-components in recent times. In this process, highly focused laser beam is irradiated on the material surface and laser scanning is carried out at different scanning patterns to alter surface conditions for improving the tribological properties of that surface. In this research study, an attempt has been made to carry out laser surface texturing on pure titanium material having a thickness of 1 mm with the aid of a pulsed Nd:YAG laser system. The various process parameters considered for the present research works are laser beam average power, pulse frequency, laser beam scanning speed, and transverse feed. Utilizing response surface methodology, experimentation has been planned. The responses measured are surface roughness, Ra and Rz in lateral and transverse directions and contact angle (θ). The chapter also highlights experimental results for validation of the developed empirical models. The test results have been analyzed using various surface plots. Multi-performance optimization has been conducted to obtain minimum values of surface roughness and contact angle. Using optical microscopic images, influence of process parameters on responses have also been discussed.
Micro ultrasonic machining is the process for micro hole drilling on hard and brittle materials l... more Micro ultrasonic machining is the process for micro hole drilling on hard and brittle materials like ceramic, glass, quartz, silicon, etc. Quartz has wide applications in microelectromechanical systems (MEMS), lenses, pressure and flow sensors, and micro-optical systems. In the present research work, optimization of the process parameters for responses such as material removal rate, overcut, and taper angle during micro ultrasonic drilling has been performed utilizing the developed empirical relationship between the responses and process parameters. Three different process parameters— power rating, abrasive slurry concentration, and tool feed rate were considered for this experimental investigation. The parametric studies have also been made based on response surface plot. Based on multi-objective optimization, optimal parametric setting for maximum material removal rate, minimum overcut and minimum taper angle have been obtained.
One of the newly developed laser micromachining processes for generating micro-turn surface on cy... more One of the newly developed laser micromachining processes for generating micro-turn surface on cylindrical work sample is laser micro-turning process. To explore the capability of this laser micromachining process for achieving particular surface profile and dimensional accuracy of machined parts, authors considered a number of experimental investigation to find the effect of process parameters. During investigation and analysis, a number of experimental designs are applied to in-depth analyse the effect of process parameters on surface roughness (Ra and Rz) and depth deviation. The governing equations of spot and circumferential overlap were developed for investigating the effect of these overlaps on surface criteria. By adopting statistical design of experiments approaches such as Response Surface Methodology, the influence of process parameters on process performance were studied. Moreover, novel machining strategy of laser defocusing condition was also implemented for improving ...
Laser micromachining technology finds great potentials for successful application in the area of ... more Laser micromachining technology finds great potentials for successful application in the area of high precision micro-engineering. Laser micro-turning process is one of the new and emerging technologies in the area of laser material processing (LMP) of engineering materials. Laser micro-turning process is one of the latest promising laser material processing techniques which can be employed for generation of micro-turning surface of particular surface profile and dimensional accuracy on cylindrical workpiece. The present paper addresses the laser micro-turning process of cylindrical shaped 99% pure aluminium oxide (Al2O3) ceramics of size 10 mm in diameter and 40 mm in length. The experiments have been conducted utilizing one factor at a time (OFAT) experimental scheme. The targated depth was set at 100 µm. Laser average power, pulse frequency, workpiece rotating speed and Y feed rate were considered as process variables. After each experiment, surface roughness (Ra and Rt) has been...
Modern Machining Technology
Advanced materials are not easy to machine due to technological and industrial development and wh... more Advanced materials are not easy to machine due to technological and industrial development and which discover extensive applications in nuclear engineering, aviation industries, etc. The manufacture of complex shape with high-quality surface finish and superior accurateness can be easily obtained by nonconventional machining processes. This manuscript covers the significant issues about the performance improvement of ultrasonic micromachining process. This book chapter also focuses on accuracy of ultrasonic micromachining process with process development. The two types of ultrasonic micromachining processes, i.e., stationary USM and rotary USM, are also discussed. Novel development for accuracy on ultrasonic micromachining (USMM) process has been emphasized and discussed. Strategies for development of ultrasonic micromachining system for performance enhancement are discussed for both stationary and rotary ultrasonic micromachining in this chapter. Micro-type tools developments for u...
Hybrid Machining Processes (HMP) consist of two different types of machining processes which are ... more Hybrid Machining Processes (HMP) consist of two different types of machining processes which are applied at the same time in the machining zone. These processes are applied for machining of various advanced materials of complex shapes and sizes. One of the important HMP is Laser Assisted Jet Electrochemical Machining (LAJECM) where a laser beam of low power and a jet of electrolyte are coaxially focused through a nozzle on a particular machine zone. Thus it eliminates the stray machining effect of ECM process. Machining zone temperature as well as electrolyte current density is increased by laser. Thus electrochemical dissolution rate and MRR are increased. In this process, jet of electrolyte is used as tool which eliminates the complex tool design problem of stand-alone ECM process. Laser assistance in ECM process improves precision, accuracy, surface quality and also productivity. Various researchers have performed their research work on LAJECM. This article focuses on various asp...
In the present research work, an analysis of fiber laser percussion micro-drilling of quartz is c... more In the present research work, an analysis of fiber laser percussion micro-drilling of quartz is conducted in order to find out the effect of the process parameters on the entry diameter of micro-hole. A response surface methodology-based experimental design planned and experiments have been conducted for the analysis. The considered process parameters are laser power, pulse frequency, duty cycle, and air pressure. The experimental results reveal that a target value of the micro-hole diameter of 100 µm is generated with the combinations of pulse frequency of 52.05 kHz, duty cycle of 69.47%, laser power of 34.25 W, and air pressure of 1.50 kgf/cm2.
Electrochemical micromachining (EMM) is widely used for micromachining applications due to its va... more Electrochemical micromachining (EMM) is widely used for micromachining applications due to its various benefits over other micromachining methods. Microtool is the vital element in EMM, since the features of the microtool like shape, size and surface finish are directly transferred to the work surfaces affecting its machining accuracy and surface quality. Disc shaped microtools are useful to improve the machining accuracy in terms of reduced overcut, taper angle and stray current effects in EMM. Disc microtools fabricated by different machining techniques needs separate machine setup and includes microtool handling, increasing the risk of microtool damage. This paper presents the micro machining techniques to fabricate the disc shaped microtools of different shank diameters, disc diameters and different disc heights with improved surface quality as required for micromachining applications, from tungsten microrod by EMM. Finally, disc shaped microtool of disc �175 µm, disc height 70 ...
The objective of this article is to exploitrelative machine utilization percentage and machine ut... more The objective of this article is to exploitrelative machine utilization percentage and machine utilization while designing efficient manufacturing cells in Cellular manufacturing (CM). This production factorsare rarely been utilized collectively while designing efficient cells in past CM literature. The proposed model not only minimizes the material handling cost but also maximizes the machine usage in a cell.A novel performance measure termed as Reformed Grouping Efficiency (RGE)is also introduced to verify the goodness of the achieved solutions. The proposed technique can be substantially handy to the production or operational personnel who are believed to decide the appropriate cell configuration on shop-floor.
Rotary ultrasonic machining (RUM) is an abrasive based advanced machining technique for cutting a... more Rotary ultrasonic machining (RUM) is an abrasive based advanced machining technique for cutting and finishing of various hard and fragile materials like ceramic, ceramics composite, glass, titanium and its alloy etc. RUM is the development over stationary ultrasonic machining for enhancement of MRR, geometrical accuracy and surface roughness. The basic mechanism of RUM is the combination of ultrasonic machining and conventional diamond grinding. In this chapter development, principle, mechanism, setup details of rotary ultrasonic machining has been discussed. It also highlights the effects of diverse input parameters on performance of RUM. The MRR always increases with spindle speed; tool feed rate and ultrasonic power. The surface roughness improved with spindle speed but worse with tool feed rate and ultrasonic power. The chipping size reduced with spindle speed but increase with tool feed rate and ultrasonic power. The cutting force reduces with spindle speed and ultrasonic power...
Titanium alloy plays a significant role in the advancement of engineering in the area of advanced... more Titanium alloy plays a significant role in the advancement of engineering in the area of advanced structures and technologies for aerospace and power industry, medicine, automatics and mechatronics, and measurement equipment, owing to its unique combination of physical, chemical and mechanical such as high strength and stiffness at elevated temperatures , high corrosion resistance, fatigue resistance, high strength to weight ratio and ability to withstand moderately high temperatures without creeping. The conventional cutting methods not only face difficulties for cutting these alloys due to their poor thermal conductivity, low elastic modulus and high chemical affinity at elevated temperatures but also undergo from higher cost associated with the machining of Ti-6Al-4V caused by lower cutting speeds and shorter tool life. The application of micro-grooves on Ti-6Al4V predominantly lies in the biomedical devices and the implantation into the bone which further needs to be integrated ...
In the present days, the requirement of micro-machining has seen a rapid growth for the fabricati... more In the present days, the requirement of micro-machining has seen a rapid growth for the fabrication of precision machining of complex parts in automobile, shipbuilding, aerospace, electronics, medical industries, etc. Surface finish of these types of components is one of the most important criteria for fabricating better quality and to avoid failure caused by surface defects. The paper addresses the experimental investigation for the variation of surface roughness of micro-channel milling on flat zirconia (ZrO2) ceramics by using a pulsed fiber laser system. In this work, considered parameters are laser power, pulse frequency, laser scan speed, and the number of scan while responses considered are surface roughness parameters, i.e., Ra and Rz. The experimental results show that aforesaid factors revealed huge influences on surface finish criteria on machined micro-channel on zirconia ceramics.
Recently, laser micromachining and micro-fabrication processes have remarkable and diversified ap... more Recently, laser micromachining and micro-fabrication processes have remarkable and diversified applications in the direction to manufacture highly precised and accurate dimensional parts or components which are used in bio as well as technological domains such as biomedical, dental and orthopaedic, aircraft engines, micro-electromechanical systems (MEMS), electronic devices, turbocharger rotor parts and nuclear reactors. The present chapter deals with experimental investigation into micro-turning process using pulsed Nd:YAG laser during machining of aluminium oxide ceramics. A number of experimental schemes were adopted to explore the parametric influences on process characteristics such as surface roughness and depth deviation. Experimental investigation was also carried out to improve the dimensional accuracy and surface characteristics of laser micro-turned components using laser defocusing technique.
An attempt has been made to investigate the machinability of zirconia toughened alumina (ZTA) ins... more An attempt has been made to investigate the machinability of zirconia toughened alumina (ZTA) inserts while turning AISI 4340 steel. The insert was prepared by powder metallurgy process route and the machining experiments were performed based on Response Surface Methodology (RSM) design called Central Composite Design (CCD). The mathematical model of flank wear, cutting force and surface roughness have been developed using second order regression analysis. The adequacy of model has been carried out based on Analysis of variance (ANOVA) techniques. It can be concluded that cutting speed and feed rate are the two most influential factor for flank wear and cutting force prediction. For surface roughness determination, the cutting speed & depth of cut both have significant contribution. Key parameters effect on each response has also been presented in graphical contours for choosing the operating parameter preciously. 83% desirability level has been achieved using this optimized conditi...
Hard and fragile materials for example ceramics, glass and quartz crystals are getting extra cons... more Hard and fragile materials for example ceramics, glass and quartz crystals are getting extra consideration in modern years owing to their higher characteristics for example high strength, high hardness, chemical durability and low density. Ultrasonic machining is an abrasive based advanced machining with non-chemical, non-electrical and non-thermal process that is particularly suitable for those brittle and hard materials. The USM process principle, mechanism of material removal, varieties of USM set up, tool development of USM process, improvement and production of 3d profile by USM process and various research issues are studied and summarized in this chapter. It also highlights the effects of different parameters of USM process on performance and development of USM process.
Within the domain of austenitic stainless steel, 316 L stainless steel is widely used in both bio... more Within the domain of austenitic stainless steel, 316 L stainless steel is widely used in both biomedical and automotive industries due to its superior mechanical properties. In the present research study, the performance of the fiber laser micro-grooving process with regard to kerf width and surface roughness Ra has been analyzed. The process parameters, i.e., laser power (7.5–20 W), pulse frequency (55–80 kHz), and cutting speed (0.5–3 mm/s) are considered to examine the aforesaid responses. The results of the experiments exhibit that the presence of flowing condition of the high-pressure assist air in combination with varying aforesaid process parameters, have a considerable effect on the kerf width characteristics along with the average surface roughness Ra of microgroove cut on 316 L stainless steel.