Tuesday 9 August 2011

report bengkel CNC EDM DIE SINKING

Introduction of Electric Discharge Machining (EDM)
Electric discharge machining (EDM) is a manufacturing process whereby a wanted shape of an object of workpiece is obtained using electrical discharges (sparks). The material removal from the workpiece occurs by a series of rapidly recurring current discharges between two electrodes, separated by a dielectric liquid and subject to an electric voltage.

Introduction of EDM Die Sinking Machine
EDM die sinking machine consists of an electrode and workpiece that are submerged in an insulating liquid such oil or, less frequently, other dielectric fluids. The electrode and workpiece are connected to a suitable power supply.
As the electrode approaches the workpiece, dielectric breakdown occurs in the fluid forming a plasma channel and a small spark jumps. These sparks usually strike one at a time because it is very unlikely that different locations in the inter-electrode space have the very identical local electrical charachetistics which would enable a spark to occur simultaneously in all such locations.
The EDM die sinking process is most widely used by the mould-making tool and die industries, but is becoming a common method of making prototype and production parts, especially in the aerospace, automobile and electronics industries in which production quantities are relatively low.

Objectives

1. Starting a CNC EDM  sinking.
2. Write a CNC program
3. Prepare and display a graph cuts using Autocad applications and Mycam
4. Coordinate offset coordinate position of the die on the workpiece
5. Programming and cutting operations on both machines
6. Stop the machine CNC EDM die sinking


CNC EDM DIE SINKING MACHINE
Die sinking EDM work steps

1. The main switch is open
2. Die sinking EDM controller switches open and the safety button is released the use of machines
3. Home panels, manual (F2) is pressed
4. coordinates X, Y and Z coordinates are adjusted to adjust the position of the electrodes
5. cycle start switch is pressed to heat the engine system

Step work PROGRAMMING

1. Oil pump is opened to drain the liquid (oil) which aims to reduce sparks during cutting.
2. G54 Work coordinate;
3. Absolute coordinate G90;
4. Position Z 50.0;
5. Position X 50.0, Y 50.0
;
6. Position Z 0.5
7. Line 3-axis Z I1 B1 -0.5;
8. NG position Z 50.0;
9. Oil pump off
Step work EDIT

1. F1 Edit, input
2. F8 file, input
3. F1 load, input
4. Yes, input
5. Enter the name of data file, input
6. Enter, input
7. F10 exit, input
8. F2 Dialogue, input
9. Key in program, input
10. Exit, input

Step work for EDGING (auto)       
1. Manual, input
2. Exit center, F6 input, input
3. Column X, Y, Z, input. Using a ruler, the distance between the axes at work things are  included. Electrodes are moved automatically to adjust the center position of work objects
4. Ix, the input
5. Ly, the input
6. LZ, input
7. Cycle start

Safety precautions when handling EDM machines

1. Make sure there are no leaks in the tank dielectric liquid tank hose and pipe connections.
2. Make sure a fire extinguisher near the machine for use in emergencies.
3. Make sure the materials are installed in areas where the right job.
4. Make sure the electrodes are not touching the thing work.
5. Make sure the cutting wire is not touching things work.
6. Make sure each cable there is no leakage.
7. Clear oily liquid that is in place the working substance during the installation process.
8. Clean all dirt in the tank desk and storage tanks.
9. Wear appropriate clothing while using machines.




Conclusion


The desired objectives have been successfully implemented. We have successfully used Die sinking EDM machine with skill and know how to enter the program and run machine for the design of the products made. In addition, we also know how to apply the program to form the G-code to get the result as above. All that was taught to us was really helpful to our advantage as we go into the working world later.




12 comments:

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