Wire Cut EDM

Wire Cut EDM, Principle of Wire Cut EDM, Applications of Wire Cut EDM, Advantages of Wire Cut EDM, Disadvantages of Wire Cut EDM

Principle of Wire Cut EDM:

            The basic mechanism of metal removal in wire cut EDM is identical to that in Die-Sinking type EDM. Instead of a moving electrode, the electrode in this process is a moving wire of Cu or Brass.

             A vertically oriented wire is fed into the workpiece continuously travelling from a supply spool to a take up spool. For this purpose, a hole is pre-drilled in the workpiece, through which the wire electrode will pass. The whole workpiece is not submerged in dielectric medium. The working zone alone is supplied with a co-axial jet of dielectric medium. This system removes the eroded particles efficiently and keep the working zone cool. One of the most important aspects in Wire cut EDM is its ability to cut complex two dimensional profiles. The machine table on which the workpiece is held, has movements along x-axis and y-axis. The drive unit for the machine table are controlled by the numerical control units based on CNC system. This system is easily programmable for linear and circular path interpolation. They provide high resolution data for accurate control of the slides of the worktable. This makes this method capable of machining any complicated through hole dies of electrically conductive materials.

Applications, Advantages & Disadvantages of Wire Cut EDM

Applications of Wire Cut EDM:

• Widely used in making of Press tool Dies.

• Re-sharpening of cutting tools and broaches.

Advantages of Wire Cut EDM:

• Tool manufacturing and storage of tools not required.

• Heat treatment distortions are totally avoided.

• Cycle time for die manufacture is shorter.

• Inspection time is reduced, due to single piece construction of dies with high positioning accuracy.

• Avoids rejections, due to initial planning and checking the program.

Disadvantages of Wire Cut EDM:

• Initial setup cost is too high.

• The wire cost is too high.

• If any wire break, total setup need to repeat again.

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