Electric Discharge Machining

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  • Topic: Electrical discharge machining, Machining, Electrochemical machining
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PROJECT REPORT ON

INVESTIGATIONS INTO ELECTRIC DISCHARGE MACHINING USING EN-31 AND HCHCr WORK PIECE

GUIDED BY:PROF.RAJESH MADARKAR

SUBMITTED BY:ROSE DEE KAMLESH GEHANI SHARDUL AMIN SIDDHESH TIWARI SUVO SUNDAR CHATERJEE VIVEK WARADE

DEPARTMENT OF INDUSTRIAL ENGINEERING
SHRI RAMDEOBABA COLLEGE OF ENGINEERING AND MANAGEMENT KATOL ROAD,NAGPUR-440013

2011-2012

ABSTRACT
The correct selection of manufacturing conditions is one of the most important aspects to take into consideration in the majority of manufacturing processes and, particularly, in processes related to Electrical Discharge Machining (EDM). It is a capable of machining geometrically complex or hard material components, that are precise and difficult-to-machine such as heat treated tool steels, composites, super alloys, ceramics, carbides, heat resistant steels etc. being widely used in die and mold making industries, aerospace, aeronautics and nuclear industries. The objective of this Project Report is to study the influence of operating parameters of pure copper electrode on the machining characteristics such as, material removal rate for work piece material EN-31 and HCHCr ( hardness 20-22 and 55-56) Keywords: EDM; TON; Ʈ ; MRR; IP;EN-31;HCHCr Purpose: In this investigation, the effects of various process parameters of sinker EDM like: • pulse on time (TON), • • peak current (IP), Duty Cycle(Ʈ)

have been investigated to reveal their impact on material removal rate of materials: • EN 31 (Hardness: 20-22)

• HCHCR (Hardness:20-22) & • HCHCR (Hardness:55-56)

using one variable at a time approach. The optimal set of process parameters has also been predicted to maximize the material removal rate. . Design/methodology/approach: The experimental studies were performed on ELECTRONICA SPRINTCUT EDM machine. Findings: The material removal rate (MRR) directly increases with increase in pulse on time (TON) upto a certain level after that it shows a declining trend and increases directly with peak current (IP)

SHRI RAMDEOBABA COLLEGE OF ENGINEERING AND MANAGEMENT
INDUSTRIAL ENGINEERING DEPARTMENT

CERTIFICATE
This is to certify that Ms. Rose dee (12),Mr. Kamlesh gehani (48),Shardul amin(76),Siddhesh tiwari(78),Suvo sundar chaterjee(81),Vivek warade(86) has submitted the project work on INVESTIGATION OF MACHINING PARAMETERS FOR EDM USING EN-31 AND HCHCr WORK PIECE during academic session 2011-2012 under the guidance of PROF.RAJESH MADARKAR as prescribed by Nagpur university and their work has been satisfactory

PROJECT GUIDE PROF.RAJESH MADARKAR

HEAD OF DEPARTMENT PROF.K.N.AGRAWAL

PRINCIPAL Dr. V.S. DESHPANDE

Acknowledgement
Hard work, sincerity and proper guidance that’s what on needs to be successful in life, that is what we have realized working on a project

No successful work can ever be the effect of a individual effort. We take this opportunity to express our deep gratitude towards everyone who has been of immense help throughout and till completion of this work. We earnestly express our thankfulness to Prof .Rajesh Madarkar , without whose invaluable guidance the present work would not see light of this day. The work would have been impossible without his co-operation and direction. In spite of being our teacher, his friendly approach has been constant source of inspiration and encouragement. We are really honored to have such a wonderful person as our guide. We are also thankful to the director of Dulocos Conveyors And Moulds Pvt. Ltd Mr.Khalid Husain We are also grateful towards everyone who has directly or indirectly contributed with their lively suggestions to make the project a success.

CHAPTER 1

INTRODUCTION

1.1 Background of EDM
The history of EDM Machining Techniques goes as far back as the 1770s when it was discovered by an English Scientist. However, Electrical Discharge Machining was not fully taken advantage of until 1943 when Russian scientists learned how the erosive effects of the technique...
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