mess age from the ed itor-in-chiefammindia.org/newsbulletin/pdf/amm_bulletin_vol8_no3.pdf · ht of...

The mis to c

desifrom

induenhrel

machA

IntConfMechthe wProb

M

In1. Messa

2. About4. About5. Memb6. Contri7. Repor8. Forthc9. Adver

CoDr. G. SSecretarTel: (044) 2

Fax: (044) 

E‐mail: seWeb Site: h

Vo

ObjectivesActiviti

main objectivcontribute to ign at all levem academic rstrial initiativ

hancing the quliability of indhines. With thAMM organiternational & ference on Mahanisms, iNaCworkshops onblems on Mac

Mechanisms, IPregularly

nside This age from the Edi

t the AMM t the IFToMM bers in the Newsibuted Article rt of an Event coming Events rtisement

ontact DeSaravana Kuy, AMM 2257 4736 (O) 

2257 4732 

ecretary@ammhttp://www.amm

olume 8

s and ies 

ve of AMM mechanical

els starting esearch to

ves, thereby uality and digenous his in view, ses the National

achines and CoMM, and n Industrial chines and PRoMM y.

Issue itor-in-Chief

etails umar 

mindia.org mindia.org 

As

8, No. 3

Volume Machineswhile theVice Presresponsib Dr. G. Saoffice bea One articlthis issueRobotics events arprogrammcommunit The conghappily pl I earnestl2016 issuBulletin oalso reque I wish to out this is I again uJournal ofMachines

ssoci

8, No. 3, Js and Mechae Independensident (East

bility to bring

arvana Kumaarers of the A

le on “3D Pe. Also theis included

round the me. Hope thety.

ratulatory nolaced within

ly request Aue. Construof the AMMested.

express myssue of the B

urge the mef the AMM s and Mecha

iatio

Mess

July 2016 ianisms (AMMnce Day of t) is out of g out this iss

ar, the SecretAMM have c

rinting” writreport of tin this issu

globe with ese would be

ote of achievn issue by the

AMM membuctive suggeM that can be

y sincere graBulletin.

embers of thcan be thougnisms comm

on fo

age from

issue of theM) is being India is knostation, the

sue.

tary, Dr. C. cooperated a

tten by Dr. Gthe 3rd Nati

ue along withthe Call

e of interest

ving an Awae Secretary,

bers to contestions, come published

atitude to all

he AMM toght of in nea

munity furthe

or MaM

Ne

m the Ed

e Bulletin opublished wocking at the Editor-in-C

Amarnath, tas usual to br

G. Sarvana Kional Worksth the annouto participato the Mach

ard by the TAMM.

tribute articlmments for

as a separat

l concerned

o think whear future to per.

achinMechews B

ditor-in-

of the Assowithin this rahe door. As Chief has to

the Presidentring out this

Kumar is pushop on Aduncements oate in the hines and M

Team of IIT B

les for the Nimproveme

te regular co

for their hel

ether an Intpromote the

Prof.SanEditor–

nes ahanisBulle

      Jul

-Chief

ociation of ainy season

the Zonal o take the

t and other s issue.

ublished in dvances in of different

respective Mechanisms

Bombay is

November ent of the olumn, are

lp to bring

ternational activity of

ntanuDas–in–Chief

andsmsetin

y 2016

The AMM headquarter is currently located at the Department of Engineering Design, IIT Madras. A new set of office bearers have taken charge of the affairs of AMM. AMM invites both individual and corporate membership from Indian academia, research organizations and industry. Membership benefits and other information about AMM are available at www.ammindia.org. The body of Zonal Vice Presidents (ZVPs) is active over the past several years with representations from the four corners of the country. They are playing the role of nodal agencies so as to decentralise the AMM official activities and to organise workshops under the aegis of AMM to popularise the mechanism science in their respective regions. They also form the editorial team of this news bulletin. AMM invites contributory articles from its members and others working in the various fields of mechanisms science for this quarterly news bulletin. Interested people can contact the editorial team.

Office Bearers of the AMM: Prof. C. Amarnath (President) Retired Professor, Department of Mechanical Engineering, Indian Institute of Technology, Bombay, Powai, Mumbai 400076, INDIA Phone: + 91 80 2368 2151 Email: president@ammindia.org

Prof. Ashitava Ghosal (Vice President) Department of Mechanical Engineering, Indian Institute of Science, Bangalore 560 012, INDIA. Phone: +91 80 2293 2956 Email: vicepresident@ammindia.org Web: http://www.mecheng.iisc.ernet.in/~asitava

Dr. G. Saravana Kumar (Secretary) Department of Engineering Design, Indian Institute of Technology, Madras, Chennai 600036, INDIA. Phone: + 91 (44) 2257 4736 Email: secretary@ammindia.org Web: http://ed.iitm.ac.in/~gsaravana

Dr. Palaniappan Ramu (Treasurer) Department of Engineering Design, Indian Institute of Technology, Madras, Chennai 600036, INDIA. Phone: + 91 (44) 2257 4738 Email: treasurer@ammindia.org Web: http://ed.iitm.ac.in/~palramu

About the Association of Machines and Mechanisms (AMM)

Dr. Santanu Das (Editor-in-Chief, News Bulletin)

Professor and Head, Department of Mechanical Engineering Kalyani Government Engineering College, Kalyani- 741235, West Bengal, INDIA

Phone: +91 9433956050

Email: sdas.me@gmail.com Dr. Shankar Sehgal, (Zonal Vice President [ZVP] North) Assistant Professor, Mechanical Engineering Department, Room No. 102, Block 2, U.I.E.T., Sector-25 Panjab University, Chandigarh- 160 014. INDIA Phone: +91 95010 24161 E-mail: shankarsehgal@yahoo.com Dr. R. Ranganath, (ZVP, South) Spacecraft Mechanisms Group, ISRO Satellite Centre, Bangalore-560017, INDIA Phone: +91 (80) 25082417 Email: rrrr@isac.gov.in

Dr. Ranjit Kumar Barai, (ZVP, East) Associate Professor, Control System Laboratory, Electrical Engineering Department, Jadavpur University, Kolkata- 700 032, INDIA Phone: +91 (33) 24139270 Email: ranjit.k.barai@gmail.com Dr. Shital S. Chiddarwar (ZVP, West) Assistant Professor, Dept of Mechanical Engineering Visvesvaraya National Institute of Technology, Nagpur, INDIA Phone: +91 9561050130 Email: shitalsc@mec.vnit.ac.in

“… the only purpose of science is to ease the hardship of human existence.”

--- B. Brecht (From : The Life of Galileo)

Editorial Team of the News Bulletin

4

Aban

bout thend Mac

e Internchine Sc

nationacience

l Federa (IFToMM

ation foM)

or the Prromotio

on of Meechanis

sm

5

Congratulations!! We are happy to note that the Dr. P. K. Patwardhan Technology Development Award for the year 2015 is conferred upon the following technology development effort :

'A Remotely Operated Ground Vehicle (Rover) for Indian Army'

by Prof. Anirban Guha and team of the Department of Mechanical Engineering, IIT Bombay. This is based on the recommendations of the Award Committee. The award carries a citation and a cash incentive of Rs. 25,000/- and will be presented during the Teachers’ Day function scheduled to be held at IIT Bombay during September, 2016. The Team consists of Prof. Anirban Guha, Prof. C. Amarnath, Prof. B. Seth, Prof. K. Kurien Issac and Mr. Abhay Kharade (Project Staff). The Secretary, Association of Machines and Mechanisms

Member in the News

6

3D Printers

Dr. G. Saravana Kumar Associate Professor, Department of Engineering Design, IIT Madras, Chennai 600036

Email: gsaravana@iitm.ac.in Abstract: Arising as a new manufacturing technology, additive manufacturing (AM) or 3D printing has caught the attention of every engineering discipline from automotive to biomedical engineering. These systems are based on a layered manufacturing technique where a 3D CAD model of the object is decomposed into cross-sectional layer representation and built in an automated fabrication machine to form physical objects. This article briefs some aspects of AM, along with some details to building a 3D printer based on open source hardware and software.

1. Introduction to 3D Printing Process 3D printing allows to quickly fabricate complex-shaped, three-dimensional parts directly from CAD models. This means that the designers have the choice of making from concept design a physical model for viewing, studying and testing as well as for manufacturing. It involves slicing the CAD model of an object into thin slices, which can be fabricated by using many solid free form manufacturing process. The advantages of these manufacturing process is that they build complex 3D objects based on automatic process planning from CAD models, use generic machines that do not need part specific fixtures or tools and require no or minimum human intervention. Unlike CNC machines, which remove material to obtain a desired shape, 3D printing systems are additive in nature. Implementation of this layered manufacturing for modern manufacturing has been realized due to the development of many technologies, including CAD, laser material processing, printing, precision motion controllers along with some traditional technologies like powder metallurgy, welding, CNC machining and lithography. Approximately three decades ago, the art of building 3D objects by layers was significantly advanced by 3D Systems Inc., a US based company [1] based on the concept of realizing 3D shapes by photo curing polymers using lasers also popularly known as Stereo-Lithography. Today many other systems are available that build layered objects by lamination of sheet material (Helisys [2]), binding powders (DTM [3] and EOS [4]) or extrusion of thermoplastics (Stratasys [5]) to name a few. The availability of vast number of patented process has ensured that many materials can be processed providing designers with alternatives to realize physical prototypes and end use parts. Recent advances in selective laser melting using laser and electron beam as power sources has enabled printing production grade metallic components for end use application in aerospace, biomedical and automotive applications [4,6]. 2. Process Sequence of 3D Printing The 3D printing process essentially starts with the creation of a computer model of the object and ends with the realization of physical prototype of the object. The complete process can be sequenced into sub process and are further enumerated and described briefly (illustration in figure 1).

Contributed Article

7

Geometof 3D psolid-mbe consreverse Data Coto a 3Dformat convertdimensiindicateresults mid-linusing so Part Buand extrdefects to the Arequires Post-proThese orequired

3. RepR Fused dLtd. [5]are of eFDM Textrudinthis techbecomeCommuparts, Rhardwarillustratextrudeprint beand z aextrudeonto the

tric Modelinprinting pro

modeling pacstructed froengineering

onversion aD printing shas become

ted into an Sional triange which sidin loss of ae node closome comme

uilding: Thisracting the and repairi

AM machins no or mini

ocessing: Inoperations ind.

Rap: Open

deposition m] in 1990s. excellent mTechnology ng thermophnology, an

e the mostunity. SinceRepRap selre, assembted in figuer. The meced. The elecaxis and oner is response bed where

ng: Creatingocess. The sckages avaiom Computg, etc., depe

and Checkinsystem prime a de factoSTL format

gles represene of the tria

accuracy as sure errors (ercial correc

s process stslice informing them, ad

ne. The macimal human

n the post-pnclude rem

Figure 1

Source 3D

modelling (FFDM build

mechanical, build obje

lastic filamnd the RepRt widely-ue many parlf-replicates

bly instructiure 3. The chanical assctronics conne for extrusible for feee the part is

g an accurasolid model ilable for dted Tomogending upon

ng: Geometrmarily throuo standard ft. The STL nting the paangle conta

well as pro(holes) and ction softwa

tarts with plmation fromdding the p

chine then bn interventio

processing smoval of sup

Schematic

D Printer

FDM) technds parts withthermal andects layer b

ment. RepRaRap project sed 3D pr

rts of RepRs by makinion, printinhardware

sembly consnstitutes of Auder), limiteding filam made. The

ate and compshould be

eveloping sgraphy (CT)n the need.

ric data of augh the STLfor interfaci

is a facetedart shape. Tins the partone to errortruncation eare and the

lacing the Sm it, checkinpart-buildingbuilds the pon.

stage, some pports and e

of 3D print

nology was h productiod chemical by layer froap was the f

started the rinter amon

Rap are madng a kit ong parts isconsists of

sists of the Arduino cont switches

ment throughre are sever

plete solid mwatertight.

solid model), Magnetic

a model is trL (Stereo-Ling with AMd format anThe verticest mass. Thers. The typierrors. The file is repai

STL file forng the slicesg parameterart describe

skilled manexcess mate

ing process

developed on-grade the

qualities. 3om the verfirst of the open-sourcng the glode from plaof itself. As available f electronicsupport fra

ntroller, stepand heating

h a nozzle aral open sou

model is a gThere are s

ls. Geometrc Resonanc

ransferred fLithographyM systems. nd consists os of the tria translationical errors avalidity of

ired.

r the optimu for any opers, if any, aed by the fi

nual operatirial, if any,

s chain

and implemermoplastic3D printingry bottom ulow-cost 3D

ce 3D printeobal membastic and R

A complete from Rep

cs, mechaname, x, y anpper motorsg for the pand meltingurce STL to

general prerseveral comric models cce Imaging

from a CADy) file formThe solid mof connecte

angle are orn from CADare flipped STL file is

um part orieen curves an

and sendingle, and this

ions are per and post-c

mented by Ss, so things

g machines up by heatD printers ber revolutiobers of th

RepRap prindocumenta

Rap wiki nical assemnd z drive as (three to dprint platforg it as it's deo G-code co

requisite mmercial can also

(MRI),

D system mat. This model is ed three-dered to

D to AM normal, verified

entation, nd other

g the file process

rformed. uring, if

Stratasys s printed that use

ting and based on n. It has e Maker

nts those ation of [7] and

mbly and axis and

drive x, y rm. The eposited

onverters

8

availabltools likto printi

Figu

Referen [1] 3D[2] H[3] D[4] EO[5] St[6] A[7] Re[8] U[9] Fr

le that can ke FreeCADing physica

ure 2 A Rep

nces

D Systems. elisys Inc., TM CorporOS GmbH. tratasys Inc

Arcam AB, hepRap, http

Ultimaker CureeCAD, htt

------

be used wD [9], it hasal parts.

pRap printer

USA. http:/http://www

ration. http:/http://www., http://ww

http://www.p://reprap.orura Softwartp://www.fr

--------------

with RepRaps become p

r assembledsampl

//www.3dsyw.helisys.com

//www.dtmw.eos.info/ ww.stratasys

arcam.com/rg/wiki/Repe, http://sofreecadweb.o

---------------

p, as an exapossible for

d using Purse printed pa

ystems.comm

m-corp/

.com /

pRap ftware.ultimorg/

-----x--------

ample Curaeveryone to

sa i3 Reworart.

m/

maker.com/

--------------

a [8]. With o have acce

rk parts [6] a

--------------

open sourcess to 3D m

along with

---

ce CAD modeling

a

9

R

The 3rd SocietyinaugurJuly 20RoorkeEngineeProf. AThe toprobotic plannin More tacademgraduatand Dev

Report

eport o

National Wy of India (Rrated by Pro016. Resoure, IIT Maders (DRDO

Ashitava Ghpics covered

vision and ng, visual se

than 60 pamic institutete students fvelopment O

t of Eve

n the 3r

Workshop onRSI) was heof. Ashok Krce persons

dras, IIT JoO), and expehosal (IISc.,d during the

applicationervoing, and

articipants es, engineefrom variouOrganisatio

nts

rd NatioR

n Advanceseld at IIT MKumar Mishs included odhpur, IIScerts from pr, Bangalore two days ons, autonomd reinforcem

attended trs from in

us institutes.on, New Del

onal WoRobotic

s in RoboticMadras on 18

hra, Dean (eminent fa

c., Texas (rivate induse)and Mr. Aof the worksmous systemment learnin

the workshndustry, sci. The worklhi.

orkshopcs

cs, organize8th and 19th

(academic Raculty fromA&M) Unitries. Keyn

Alok Mukheshop includems, soft robng.

hop. Particiientists fromshop was sp

p on Ad

ed by IIT MJuly 2016.

Research), Im IIT Delhiiversity, sciote lectureserjee (R&Ded kinematiotics, mobi

ipants inclum R&D eponsored by

dvances

Madras and RThe workshIIT Madrasi, IIT Kanpientists froms were deliv

D Engineersics of manipile robotics,

uded facultestablishmeny Defence R

in

Robotics hop was

s on 18th pur, IIT m R&D vered by s, Pune). pulators, , motion

ty from nts, and Research

10

Forthcoming Events

11

12

Forthcoming Events

13

14

Forthcooming

W

Events

Website: htttp://www.m

mtm-robotics

s-2016.igm..rwth-aache

en.de/

15

Forthcoming Events

16

Forthhcomingg Eventss

17

Forthcoming Events

18

EdEdEd

A

ditorial Boaditor-in-Chieditorial Mem

RecurDsolutionsfirst Multlinear finparadigm Today, RdisciplinaOptimiza

Advertis

ard ef: Prof. S

mbers: Prof. SDr. R. 

  Prof. RProf. S

Dyn, bases. Startingi-Flexible

nite elemem in the fie

RecurDyary CAE ation, all in

sement

Santanu Das,Shankar SehgRanganath, SRanjit KumarShital S. Chid

ed on mug with justBody Dyn

ent methoeld of mult

yn continusoftware

n a single

Fun(Co

301 Od

t

 Kalyani Govgal, Panjab USpacecraft Mr Barai, Jadavdarwar, VNIT

http://ww

ulti-body dt multi-bonamics (Mods into itti-physics

ues to leathat integframewor

nction Bayontact: B. deon Plaz

New

vernment EnUniversity, ChMechanisms vpur UniversT, Nagpur [Z

ww.functio

dynamics,ody dynamMFBD) to its numeriCAE.

ad the mugrates MFrk.

y Dynam Sridhar -za, II Sectw Delhi 11

gineering Cohandigarh [ZGroup, ISROity, Kolkata [ZVP West] 

onbay.co.k

is the CAmics in 20integrate mical integr

ulti-physicFBD, Lub

mics (I) Pv- 98110 6tor, 10, D10075

ollege, Kalyanonal Vice Pre Satellite Cen[ZVP East]  

kr

AE softwa004, Recmulti-bodyrator, whi

cs CAE fiebrication, C

vt. Ltd. 8096) waraka,

ni  esident (ZVPntre, Bangalo

are for mcurDyn by dynamicich opene

eld by creControl, a

P) North] ore [ZVP Sou

multi-physicbecame thcs and noed the ne

eating inteand Desig

uth] 

cs he n-

ew

er-gn