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How to Use an EDM Drilling Machine
How to Use an EDM Drilling Machine
When working with difficult-to-machine materials, a precision EDM drilling machine can save time and money for your shop. Electrical discharge machining (EDM) uses sparks to subtract material from a workpiece rather than sharp cutting tools, and it’s especially good for hard metals like tungsten carbide. However, even though it’s more complicated than CNC machining and other standard processes, some tips can improve its efficiency.
When using an EDM drilling machine, it is important to keep in mind that several factors can affect the quality of your working. For example, the power settings can impact the speed and accuracy of your cuts, as well as the electrode material and dielectric fluid used. Changing any of these variables can help you improve your results, so it’s important to understand them and learn what they mean.
Hole drill EDM is a specialized form of electrical discharge machining that is typically used for complex, atypical hole-drilling tasks that require minimal material impact and extreme accuracy. This process is also ideal for materials that are impossible to machine with traditional techniques, such as hardened steels and tungsten carbide. Unlike other EDM processes, it can create holes with a smaller diameter and achieve greater L:D (length-to-diameter) depth ratios.
An EDM drilling machine operates by using a tubular brass or copper electrode to pulse-discharge electrically to erode and shape the workpiece into a desired cavity. This tube can be either a single-channel or multi-channel tube, with the latter preferred to eliminate the creation of cores and slugs during the machining process. Deionized water is then sent through the tube as a flushing agent and a dielectric fluid to stabilize the electrical discharges.
SFX EDM drilling machine that uses a rotary spindle to hold and advance the electrode while performing a programmable, continuous, automated and accurate hole-drilling operation. It can burn holes in a wide range of materials and sizes, including hardened steels, quenched steel, tungsten carbide, aluminum and stainless steel. The SFX EDM drilling machine can also drill holes that are difficult to produce with other machining methods, such as group holes in filter plates and oil passages in hydraulic and pneumatic components.
During lab testing, the SFX EDM drilling system was able to burn a 3.937” diameter hole in hardened tool steel with a 0.040” electrode and experience only 55% of electrode wear. This is a significant improvement from the 100-150% wear experienced by conventional machines using a similar electrode. These improvements can result in increased productivity, faster cycle times and better part quality. Achieving this goal requires a thorough understanding of the process, as well as knowledge and experience with the equipment. Fortunately, a reputable supplier such as SFX can help you maximize your EDM drilling machine and achieve the best results possible.
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