1. PRESENTATION on EDM, ECM& LBM Presented by-: kumar saurabh Roll no-: 1214340081 Branch-: ME 1 Submitted to-: Mr Deepak Sharma

2. Content 1.INTRODUCTION 2.WORKING PRINCIPLE 3.APPLICATION 4.NEED 5.ADVANTAGES & DISADVANTAGES

3. LASER BEAM MACHINING

4. INTRODUCTION The word laser stands for light amplification by stimulated emission of radiation It is a very strong monochromatic beam of light It has very small beam divergence It is thermoelectric process

5. Application Cutting Metals Plastic Ceramics Drilling Metals Plastic Surface treatment (metals) Welding(metals) Laser type PC02;CWCO2;Nd CWCO2 PCO2 PCO2;Nd:YAG Excimer CWCO2 PCO2;CWCO2;Nd:YAG;Nd:glass

6. Working Principle Weak light flash is amplified in the ruby This released energy from ruby accelerates the intensity of the beam of light, which leaves the rod & focused on workpiece Laser is most efficient when kept very cold & liquid nitrogen at -196c Lamp operates from 1 flash every 3min to 12 flashes per minute Laser energy is applied to the workpiece in less than 0.002 sec

7. Schematic Diagram

8. ADVANTAGE OF LBM More precise Useful with a variety of materials: metals,composite,plastic and ceramics Smooth, clean cuts Faster process Decreased heat affected zone

9. Limitations of LBM Laser beam can be dangerous if it is not used carefully Production laser machines are costly Diffcult to control hole diameter tolerances at better than + Holes produces may taper from entry to exit

10. Application of LBM Manufacturing of meal sheets for truck bed hitch plates Splicing of aluminium sheets in the aircraft industry Cutting of multi-layered insultation for aircraft

11. what is EDM?  Electrical Discharge Machining  Used on hard metals  works with electrically conductive materials

12.  In1770s, discovered by Joseph Priestly.  Developed in the mid 1970s  In the mid 1980s, the EDM techniques were transferred to a machine tool  Today, it is a viable technique that helped shape the metal working industry

13. Where deep cutting is required In unattended cutting For high-expertise parts Where EDM finish is specified For hard materials For sharp inside corners For the most complex geometry

14. Uses very powerful sparks (~3x106 V/m) Series of rapidly recurring charges electro erosion Remove excess by fluid flow

15. DIAGRAM

16. Workpiece Sparks Electrodes Dielectric liquid Deionized water Dielectric oil Cutting speed Accuracy

17. TYPES OF EDM Wire Machining Ram Machining

18. ADVANTAGES handles delicate tasks may cut or drill very hard materials highly accurate very small kerf for wire EDM produces complex, deep, or 3-D shapes no burrs

19. DISADVANTAGE electrode wear slow cutting rates thin, brittle heat-affected zone

20. Application Can produce blind complex cavities Can produce micro holes for nozzle Can produce narrow slots Compatible shapes are of the following categories Planar Prismatic Thin wall

21. ELECTRO CHEMICAL MACHNING It is a method of removing metal by a electro chemical process It is use for mass production It is use for working extremely hard material or material that are difficult to machine using conventional machining It can small or odd –shaped angles Both internal and external geometries can be machined

22. Working principle of ECM  An electrode and workpiece(conductor) are placed in an electrolyte and a potential voltage is applied.  On the anode ( +ve )side the metal molecules ionize break free of the workpiece, and travel through the electrolyte to the electrode.  Variation in the current density will result in work taking the electrode shape.  The electrode is fed with constant velocity and the electrolyte is fed through the tool.  The tool is designed to eliminate deposition of the ionized metal on the electrode.

25. Advantages of ECM Good for low machinability, or complicated shapes Very little tool wear Forces are large with this method because of fluid pumping forces No thermal or mechanical stresses on the workpiece Faster stock removal & better surfaces finish

26. Disadvantages of ECM Expensive machine Rigid fixturing is required to withstand the high electrolyte Not applicable with electrically non conducting materials & jobs with very small dimensions High specific energy consumption

27. Application of ECM High temp. alloy forging Turbine wheels with integral blades Jet engine blade airfoils Jet engine blade cooling holes Small deep holes Odd shaped holes & cavities

28. THANK YOU