Shubham Suryawanshi | Savitribai Phule Pune University (original) (raw)

Papers by Shubham Suryawanshi

Materials Today: Proceedings

To meet the future goals of higher productivity and lower production costs, the cutting speeds an... more To meet the future goals of higher productivity and lower production costs, the cutting speeds and feeds in modern gear hobbing applications have to increase further. Basically, the parameters that have an influence on the cutting process should be known and possible to control. Gear manufacturing is highly important in automotive industry. The prevalent manufacturing method is gear hobbing with gear. Through the experimental investigations and theoretical studies of significant parameters such as speed, feed, depth of cut, material, surface finish, cost etc, a continuous process optimization is necessary to satisfy the customer demands. Changing the substrate material is a basic approach in optimization of operation times. Taguchi method can be used for selecting the design of experiments and Principle Component analysis can be used to optimize the process. This research paper focuses on improving the productivity by using different cutter materials. KeywordsGear Hobbing, Optimizat...

Tribology in Industry, 2018

This paper presents the performance analysis for plain and elliptical journal bearing operating w... more This paper presents the performance analysis for plain and elliptical journal bearing operating with industrial lubricants. Titanium dioxide nanoparticle of size 40 nm is used as a lubricant additive to examine the performance of the bearing. Comparative analysis is carried out for three different lubricants with titanium dioxide (0.5% wt) nanoparticles. Performance of bearing is measured at speeds ranging from 500 r.p.m. to 1000 r.p.m. and at 1000 N load. The study of antiwear and antifriction properties for lubricants is carried out on four ball Tribo-tester for operating conditions specified by ASTM standards. An influence of titanium dioxide as an additive on the performance characteristics of the journal bearing such as pressure distribution, load carrying capacity, attitude angle, power loss, oil flow rate, side leakage, frictional force and temperature rise in a film is examined in this paper. The elliptical journal bearing improves the performance of a system over plain bearing operating with the same lubricant.

Tribology in Industry, 2019

The objective of this article is to study the performance characteristics of the journal bearing ... more The objective of this article is to study the performance characteristics of the journal bearing experimentally having different geometries operating with commercial Mobil grade lubricants that are used in power plant. Three grades of Mobil lubricants (DTE 24, DTE 25, and DTE 26) have been considered during the study. TiO2 nanoparticle additives have also been considered during the study as a lubricant additive to examine the performance of journal bearings. An analytical approach was presented in the author's earlier work to obtain pressure and temperature profile. The dynamic characteristics such as stiffness and damping properties of journal bearings are represented in this paper. An experimental test rig is developed to accommodate any geometrical type of bearing. An elliptical journal bearing shows the superior performance than that of a plain bearing. The obtained experimental results are in a very good agreement with theoretical results for pressure and temperature profile.

Industrial Lubrication and Tribology, 2018

Purpose The purpose of this study is to investigate the tribological performance (anti-friction a... more Purpose The purpose of this study is to investigate the tribological performance (anti-friction and anti-wear properties) of commercial Mobil grade lubricants used in a journal bearing system in a power plant. Design/methodology/approach Three grades of Mobil lubricants (DTE 24, DTE 25 and DTE 26) are considered during the study. Titanium dioxide nanoparticles (TiO2, 0.5 Wt.%) of size 40 nm are used as a lubricant additive to examine the performance of the lubricants. The viscosity of the lubricant is computed using modified Krieger–Dougherty viscosity model. The morphology of TiO2 nanoparticles is studied with the help of scanning electron microscopy, ultra violet spectrophotometer and X-ray diffraction. The study of antifriction and antiwear properties for lubricants is carried out on four-ball tribo-tester for operating conditions specified by ASTM standards. Findings The tribochemical reaction film is formed between ball surfaces during the experiments on four-ball tester that m...

Journal bearings have the longest history on scientific study of any class of fluid-film bearings... more Journal bearings have the longest history on scientific study of any class of fluid-film bearings. These journal bearings are widely used in most of the rotating machineries due to its high load-carrying capacity and formation of fluid-film thickness during the operation. This research paper represents performance evaluation of hydrodynamic journal bearing using Computational Fluid Dynamics (CFD) approach. For this study, two different geometrical bearings are considered (circular and non-circular) operating with commercially used lubricant. Comparative analysis of both the bearings is carried out at the same operating conditions. Analytical results are obtained for pressure distribution for both the bearings and these results are compared with CFD simulated results. A good agreement is found between the comparative results that propose a validation of the analytical results. The CFD method can be a very useful tool for study on the bearing lubrication problem and can accurately pre...

The revolutionary changes have taken place in the field of hydrostatic and hybrid journal bearing... more The revolutionary changes have taken place in the field of hydrostatic and hybrid journal bearing from very slow speed radar to very high speed turbo machinery. These find application in ultra precision machine tools requiring high stiffness to improve accuracy. The growing demands from industries for higher speed applications and ability of hybrid journal bearing to support heavy loads have necessitated studying the performance of bearings in detail under more realistic conditions. However, the high speed operation of bearings results in higher operating temperature of both lubricant and bearing surface. Increase in bearing temperature poses a danger to bearing liner as well as to lubricant. It not only degrades the performance of a bearing but also of machine itself. Also, an increase in lubricant temperature reduces its viscosity and thereby changes the fluid-film profile

Production cars are designed to understeer and rarely do they over steer. If a car could automati... more Production cars are designed to understeer and rarely do they over steer. If a car could automatically compensate for an understeer/over steer problem, the driver would enjoy nearly neutral steering under varying operating conditions. Four-wheel steering is a serious effort on the part of automotive design engineers to provide near-neutral steering. Also in situations like low speed cornering, vehicle parking and driving in city conditions with heavy traffic in tight spaces, driving would be very difficult due to vehicle’s larger wheelbase and track width. Hence there is a requirement of a mechanism which result in less turning radius and it can be achieved by implementing four wheel steering mechanism instead of regular two wheel steering. Our 4 Wheel Steering System gives 39.56% reduction in turning circle radius of a hatchback which is reduced from 4.6 m to 2.78 m, considering Maruti Suzuki ALTO 800 as a standard car for our calculationswhich gives much better maneuverability and...

Industrial Lubrication and Tribology , 2019

Purpose – The purpose of this study is to investigate the tribological performance (anti-friction... more Purpose – The purpose of this study is to investigate the tribological performance (anti-friction and anti-wear properties) of commercial Mobil grade
lubricants used in a journal bearing system in a power plant.
Design/methodology/approach – Three grades of Mobil lubricants (DTE 24, DTE 25 and DTE 26) are considered during the study. Titanium dioxide nanoparticles (TiO2, 0.5 Wt.%) of size 40 nm are used as a lubricant additive to examine the performance of the lubricants. The viscosity of the lubricant is computed using modiﬁed Krieger–Dougherty viscosity model. The morphology of TiO2 nanoparticles is studied with the help of scanning electron microscopy, ultra violet spectrophotometer and X-ray diffraction. The study of antifriction and antiwear properties for lubricants is carried
out on four-ball tribo-tester for operating conditions speciﬁed by ASTM standards.
2 Findings – The tribochemical reaction ﬁlm is formed between ball surfaces during the experiments on four-ball tester that minimizes the
asperity contact due to addition of TiO2 nanoparticles in the lubricant. The viscosity of the lubricant is enhanced due to the addition of TiO2 nanoparticles. The frictional coefﬁcient and wear scar diameters of balls in the lubricants are reduced in the range of 6-26 and 2-7 per cent, respectively.
Originality/value – The tribological properties of TiO2 as a lubricant additive in three commercial Mobil grade lubricants are investigated in this
paper. The results obtained in this paper are expected to be helpful to bearing designers, researchers and academicians concerned with the relevant
study.

Tribology in Industry , 2019

The objective of this article is to study the performance characteristics of the journal bearing ... more The objective of this article is to study the performance characteristics of the journal bearing experimentally having different geometries
operating with commercial Mobil grade lubricants that are used in
power plant. Three grades of Mobil lubricants (DTE 24, DTE 25, and DTE
26) have been considered during the study. TiO2 nanoparticle additives have also been considered during the study as a lubricant additive to
examine the performance of journal bearings. An analytical approach
was presented in the author’s earlier work to obtain pressure and
temperature profile. The dynamic characteristics such as stiffness and
damping properties of journal bearings are represented in this paper. An
experimental test rig is developed to accommodate any geometrical type of bearing. An elliptical journal bearing shows the superior performance than that of a plain bearing. The obtained experimental results are in a very good agreement with theoretical results for pressure and temperature profile.

Tribology in Industry, 2018

— To meet the future goals of higher productivity and lower production costs, the cutting speeds ... more — To meet the future goals of higher productivity and lower production costs, the cutting speeds and feeds in modern gear hobbing applications have to increase further. Basically, the parameters that have an influence on the cutting process should be known and possible to control. Gear manufacturing is highly important in automotive industry. The prevalent manufacturing method is gear hobbing with gear. Through the experimental investigations and theoretical studies of significant parameters such as speed, feed, depth of cut, material, surface finish, cost etc, a continuous process optimization is necessary to satisfy the customer demands. Changing the substrate material is a basic approach in optimization of operation times. Taguchi method can be used for selecting the design of experiments and Principle Component analysis can be used to optimize the process. This research paper focuses on improving the productivity by using different cutter materials.

Lateral Cock Valve is used in Drip irrigation and Sprinkler systems, for regulating water flow an... more Lateral Cock Valve is used in Drip irrigation and Sprinkler systems, for regulating water flow and pressure. It regulates the flow of water manually, as and when required. Study shows that, organization using the lateral cock valve, have few functional problems such as, leakage, proper gripping, fitting of top part, slipping problem etc., which has to be identified and rectified before it can be practically used. So, Modeling and Development by 3D CAD Software of the Lateral Cock Valve is needed to be done. Considering all its functional problems and needs, development of the original part is to be done. Prototype can then be manufactured using 3D Printing Technology which is one of the Rapid Prototyping Technology which save time and cost by giving accurate results. The research focuses on Prototype development considering functional needs and problems using 3D Printing Technology, to save time and cost of fabrication and die design for Lateral Cock Valve.

ARTICLE INFO Lateral Cock Valve is used in Drip irrigation and Sprinkler systems, for regulating ... more ARTICLE INFO Lateral Cock Valve is used in Drip irrigation and Sprinkler systems, for regulating water flow and pressure. It regulates the flow of water manually, as and when required. Study shows that, organization using the lateral cock valve, have few functional problems such as, leakage , proper gripping, fitting of top part, slipping problem etc., which has to be identified and rectified before it can be practically used. So, Modeling and Development by 3D CAD Software of the Lateral Cock Valve is needed to be done. Considering all its functional problems and needs, development of the original part is to be done. Prototype can then be manufactured using 3D Printing Technology which is one of the Rapid Prototyping Technology which save time and cost by giving accurate results. The research focuses on Prototype development considering functional needs and problems using 3D Printing Technology, to save time and cost of fabrication and die design for Lateral Cock Valve.

In automobile industry gear manufacturing is highly important. To increase the production without... more In automobile industry gear manufacturing is highly important. To increase the production without sacrificing quality one of the most effective ways is by improving the substrate material hob. The influencing parameters for cutting process should be known and possible to control. Through the theoretical studies and experimental investigations of significant parameters such as feed, hob material, feed, surface finish, cost. A continuous process optimization is necessary to satisfy the customer demands. A basic approach in optimization of operation times, is changing the substrate material. Taguchi method can be used for selecting the design of experiments and suitable optimization method can be used to optimize the process. This research paper focuses on improving the productivity by using different cutter materials. I. INTRODUCTION Hobbing is a continuous gear generation process widely used in the industry for high or low volume production of external cylindrical gears [1].Gear hobbing is one of the major manufacturing processes in the industry. Modern engineering practice is continually increasing its demands form or egearing of old and new types with a higher and higher degree of accuracy [2]. The traditional gear machining methods hobbing and shaping has limitations on manufacturer's ability to efficiently manufacture gears in small and medium batches [3]. For a spur gear being cut with a single start hob, the work piece will advance one tooth for each revolution of the cutter. When hobbing a 20-tooth gear, the hob will rotate 20 times, while the work piece will rotate once. The profile is formed by the equally paced cutting edges around the hob, each taking successive cuts on the work piece, with the work piece in a slightly different position for each cut. Several cutting edges of the tool will be cutting at the same time[7].

Hydrodynamic journal bearings are generally used to support the rotating shafts with the applicat... more Hydrodynamic journal bearings are generally used to support the rotating shafts with the application of sliding motion. It sustains the radial as well as axial load in their respective directions. Whenever it runs at high operating conditions, temperature, which effects on lubricant viscosity plays a vital role as it varies due to the bearing surface. The main objective of this paper is to analyse the performance of the plain circular and non-circular journal bearings by using design parameters. An alternative approach to thermo-hydrodynamic analysis is presented assuming that all the heat that is generated by viscous shear in the fluid film is dissipated only in the fluid (no heat conduction through the boundaries). The effect of lubricant viscosity on the parameters such as eccentricity, Sommerfeld number, load carrying capacity, pressure distribution, frictional force, coefficient of friction, power loss and temperature distribution is presented. The analysis is done for a wide range of load, speed, lubricant viscosity. The results obtained theoretically can be validated by experimental methodology as mentioned in this paper. The setup prepared can be used for all types of bearings with different geometries. The analysis is carried out for various grades of a lubricant in which an effect of lubricant viscosity on the bearing temperature is identified. Comparative study is done by taking these lubricants. The study of geometry is also presented as it plays a vital role to overcome the thermal effects as well as instability.

– The revolutionary changes have taken place in the field of hydrostatic and hybrid journal beari... more – The revolutionary changes have taken place in the field of hydrostatic and hybrid journal bearing from very slow speed radar to very high speed turbo machinery. These find application in ultra precision machine tools requiring high stiffness to improve accuracy. The growing demands from industries for higher speed applications and ability of hybrid journal bearing to support heavy loads have necessitated studying the performance of bearings in detail under more realistic conditions. However, the high speed operation of bearings results in higher operating temperature of both lubricant and bearing surface. Increase in bearing temperature poses a danger to bearing liner as well as to lubricant. It not only degrades the performance of a bearing but also of machine itself. Also, an increase in lubricant temperature reduces its viscosity and thereby changes the fluid-film profile

Materials Today: Proceedings

Tribology in Industry, 2018

Tribology in Industry, 2019

Industrial Lubrication and Tribology, 2018

Industrial Lubrication and Tribology , 2019

Tribology in Industry , 2019

The objective of this article is to study the performance characteristics of the journal bearing ... more The objective of this article is to study the performance characteristics of the journal bearing experimentally having different geometries
operating with commercial Mobil grade lubricants that are used in
power plant. Three grades of Mobil lubricants (DTE 24, DTE 25, and DTE
26) have been considered during the study. TiO2 nanoparticle additives have also been considered during the study as a lubricant additive to
examine the performance of journal bearings. An analytical approach
was presented in the author’s earlier work to obtain pressure and
temperature profile. The dynamic characteristics such as stiffness and
damping properties of journal bearings are represented in this paper. An
experimental test rig is developed to accommodate any geometrical type of bearing. An elliptical journal bearing shows the superior performance than that of a plain bearing. The obtained experimental results are in a very good agreement with theoretical results for pressure and temperature profile.

Tribology in Industry, 2018