Academic Positions

  • Present 2014

    Assistant Professor

    Walchand College of Engineering, Sangli ,Mechanical Engineering

  • 2014 2013

    Assistant Professor

    V.J.T.I., Mumbai ,Mechanical Engineering

Education & Training

  • M.Tech 2012

    Mechanical-CAD/CAM

    SGGSIE&T, Nanded, Maharashtra

  • B.Tech. 2010

    Production Engineering

    SGGSIE&T, Nanded, Maharashtra

Honors, Awards and Grants

My Research Students

Mr. Gopal Rathod

Mechanical Engineering

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Good to work with them!

Research Projects

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Optimization of ECM process parameters for MRR and ROC of tool steel


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R M Chanmanwar, S B Sharma, L N wankhade, V M Nandedkar,
Journal Paper Electrochemical machining (ECM) is among the well-recognized non-traditional manufacturing processes in industry. An electrical current passes through an electrolyte solution between a cathode tool and an anode workpiece. The workpiece is eroded in accordance with Faraday’s law of electrolysis. Since the first introduction of ECM in 1929 by Gusseff, its industrial applications have been extended to electrochemical drilling, electrochemical deburring, electrochemical grinding and electrochemical polishing. ECM was found particularly advantageous for high-strength alloys. For example, the semi- conductor industry frequently requires the machining of components of complex shape and high-strength alloys hence ECM is a major process candidate for semiconductor devices and thin metallic films. The accuracy of machining can be improved by the use of pulsed electrical current. Controlling the wave pattern of pulsed current and the time of pulsed on/off is effective. Among the often considered electrolytes, the current efficiency is nearly 100% for NaCl. The current efficiency depends on the current density in use of NaNO3.When this process is applied to the micromachining range for manufacturing of micro components or features, it is referred as electrochemical micromachining EMM. The main advantages of ECM are: 1. Machining does not depend on the hardness of the metal 2. Complicated shapes can be machined on hard surfaces 3. There is no tool wear 4. It is environmental friendly.

Abstract

The machining of complex shaped designs was difficult earlier, but with the advent of the new machining processes incorporating in it chemical, electrical & mechanical processes, manufacturing has redefined itself. This paper intends to deal with one of the revolutionary process called Electro Chemical Machining (ECM) which is unconventional process. New materials which have high strength to weight ratio, heat resistance and hardness and also complex shapes and need for accuracy demand newer type of machining process. ECM removes material without heat. Almost all types of metals can be machined by this process. The said paper is an experimental study of effect of voltage, Electrolytic concentration, and Inter electrode gap variation on MRR and ROC for Tool steel. The results of experiment show the material removal increases with increasing electrical voltage, molar concentration of electrolyte, and reduced inter-electrode gap.

Development of Modular Fixture for Pinhole Operation of Compressor Valve to Improve Productivity on VMC


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V. B. Jondhale, R.M. Chanmanwar, U.A. Dabade ,
Journal Paper There are many factors playing roles in manufacturing processes in order to improve productivity and reduce production time in recent decades. Fixtures are one of the important tools that are widely used to achieve this goal. Fixtures have a direct impact upon product manufacturing quality, productivity and cost hence there are many factors playing roles in manufacturing processes in order to improve productivity and reduce production time (Nasr et al., 2011). Fixtures are mechanism used to rapidly, accurately, and securely position work piece during machining such that all machined parts fall within the design specifications. This accuracy facilitates the interchangeability of parts. Therefore, with the increasingly intense global competition which pushes every manufacturer in industry to make the best effort to sharpen its competitiveness by enhancing the product’s quality, reducing the production costs and reducing the lead time to bring new products to the market.There is a strong desire for the upgrading of fixture designs with the hope of making sound fixture design more efficiently and at a lower cost (Soni and Mane, 2013). Several designs and design methodologies associated with fixture design and their practical implementation, which have been addressed by many authors (Maniyar, Vakharia and Patel,2009; Suri and Sethi,2012;Zheng and Chew, 2010).

Abstract

The essential factors for the recent manufacturing companies are to develop variety of products within short timeframes. Therefore, the flexible manufacturing techniques are rapidly growing for improve productivity and reduce cycle time. A number of factors contribute in organizational ability to achieve flexibility.Use of fixtures is one of them to increase the pace of production. Modular fixtures have brought many benefits to manufacturing industries including reduced costs and times of production. This paper uses newer and innovative design of modular fixture for pinhole operation in VMC. Generally a modular fixture is made by assembling a number of fixture elements in a feasible predetermined sequence. The function of modular fixture is to reduce installation of new fixture for new type of component and to improve productivity by loading and unloading of components easily.

3D Printer Prototype using Fused Deposition Modelling


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A.B. Bagal, S.G. Wagale, S.S. Mujawar, K.D. Ghorpade, A.G. Gaitonde, R.M.Chanmanwar,
Conference Paper Additive Manufacturing, formerly known as Rapid Prototyping is defined as “a process of joining materials to make objects from 3D model data, usually layer upon layer, as opposed to subtractive manufacturing methodologies”. Recently, it has been coined as 3D printing. Within the additive method, an object to be written is built from the base-up by in turn adding it to layers of the development material. Its distinct ability to manufacture complex shapes and structures has already made it invaluable for the production of prototypes such as engine manifolds for the automotive industry, and tools such as investment casting moulds in the jewellery and aeronautical industries. As the technology becomes more developed, additive manufacturing is poised to move on to the direct production of components and parts. Each of these layers are seen as a thinly sliced horizontal crosssection of the eventual object. To prepare a digital file for printing, the 3D modelling software “slices” the final model into hundreds or thousands of horizontal layers. When the sliced file is uploaded in a 3D printer, the object is created layer by layer. The 3D printer reads every slice (or 2D image) and creates the object, blending each layer with hardly any visible sign of the layers, with as a result the three dimensional object.

Abstract

Additive manufacturing is a new way of making products and components from a digital model. This project uses the additive manufacturing technology of Fused Deposition Modelling (FDM) which is a common material extrusion process trademarked by the company Stratasys. A triaxial motion mechanism which forms the basic working assembly for 3D printers is designed. The manufacturing process using FDM starts with developing a CAD model using CATIA or any other CAD software. The developed CAD model is given as an input to slicing software Slic3R. Slicer generates G-code from CAD model and these G-codes are given to microcontroller (Arduino ATMega 260) through software known as Pronterface. The RAMP circuit along with motor driver controls the motor as per the instructions given by the microcontroller. The three axes along with electronic system is integrated into a working model of 3D printer.

OPTIMIZATION OF PHOTO-CHEMICAL MACHINING FOR COPPER MATERIAL BY USING ANOVA AND GRA


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G.R. Rathod, S.U. Sapkal, R.M. Chanmanwar,
Conference Paper The PCM is one of the non-conventional machining processes that produces a burr free and stress free flat complex metal components. The machining takes place using a controlled dissolution of work-piece material by contact of the strong chemical solution. The PCM industry currently plays a vital role in the production of a variety of precision parts viz. microfluidic channels, silicon integrated circuits, copper printed circuit boards and decorative items. It is mainly used for manufacturing of micro-components in various fields such as electronics, aerospace and medical. It employs chemical etching through a photo-resist stencil as a method of material removal over selected areas. This technique is relatively modern and became established as a manufacturing process. The newly-developed products made from PCM are relevant to Micro-engineering, Micro-fluidic and Microsystems Technology.

Abstract

Photochemical machining (PCM) is one of the non-conventional machining processes that produce burr free & stress free flat complex metal components. It employs chemical etching through a photoresist stencil as the method of material removal over selected areas. This process is generally used for the fabrication of micro parts like micro filters, micro channels. This paper presents the machining of Copper using Photochemical Machining (PCM). Twenty-seven experimental runs base on full factorial (33) Design of Experiments (DOE) technique were performed. The control parameters considered were the etchant concentration, etching temperature and etching time. The response parameter was Undercut (Uc) and Surface Roughness. The effect of control parameters on undercut and Surface Roughness was analyzed using Analysis of Variance (ANOVA) and GRA technique and their optimal conditions were compared. The minimum undercut (Uc) and Surface Roughness was observed at the etching temperature of 400C, etching concentration of 500gm/L and 4 minutes etching time. It was found that etchant temperature and etching time are the most significant factors for undercut.

Application and Manufacturing of Microfluidic Devices: Review


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R.M.Chanmanwar, R.Balasubramaniam, L.N.Wankhade,
Journal Paper Micro domain varies not only from the macro domain but also from each other in basic characteristics. The microfluidic domain differs from other domains in terms of area, which is indicated by difference in the whole design process, as well as in design support and manufacturing. Effects which can be omitted on a macro scale are dominant when fluid dynamic faces the issue of scale. Lack of proper understanding of this area creates difficulties and causes error prone designs. In comparison to the macro-domain, where precision in many cases is required and tolerances can be tight, in the micro-scale, dimensions are in the scale of macro-scale tolerances. Due to this, the majority of manufacturing methods start to be costly and the selection of materials for new devices is constrained. Fig.1. shows the macro and micro scales and devices for some application areas. Since, the application of microfluidic devices are continuously increasing, to have a better insight about this area, a brief review about the application areas and applicable manufacturing process and various issues is carried-out and presented in this paper.

Abstract

Microfluidic devices are gaining increasingly popularity owing to their many advantages. Microfluidics varies in terms of forces operating from other domains as well as from macro-scale fluidic devices. Effects which can be omitted on a macro scale are dominant when fluid dynamic faces the issue of scale. With the recent achievement in the biotechnology, microfluidic devices promise to be a big commercial success. To have a better understanding of the various types of microfluidic devices, their application areas, basic design and manufacturing issues, a brief review is carried out and reported in this paper. Few devices and their applications are discussed.

Current Teaching

  • Present 2014

    Machine Drawing

    Different machine components, conventions, limits, fits and tolerances, assembly and details drawing

  • Present 2015

    Manufacturing Process and Machine Tools

    Different conventional manufacturing processes like casting, welding, sheet metal etc

  • Present 2015

    CAM/CAE

    Introduction to computer aided manufacturing system, CNC and APT programming etc.

  • Present 2014

    FEM

    Basics of FEM

Teaching History

  • 2014 2013

    Engineering Graphics

    projection of different objects and basics of engineering graphics.

At My Office

CAD/CAM Lab/PCM Lab Mechanical Engineering Department, Walchand College of Engineering, Sangli Maharshtra-416 415

At My Work

You can find me at my office located at CAD/CAM Lab/PCM Lab in Mechanical Department. I am at my office every day from 9:00 until 18:00, but you may consider a call to fix an appointment.

At My Lab

You can find me at my office located at CAD/CAM Lab/PCM Lab in Mechanical Department. I am at my office every day from 9:00 until 18:00, but you may consider a call to fix an appointment.