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EDM Companies

IQS Directory provides a detailed list of EDM companies and suppliers. Find EDM companies that can design and engineer EDM services to your specifications. Peruse our website to review and discover top EDM companies with roll over ads and complete product descriptions. Connect with the EDM companies through our hassle-free and efficient request for quote form. You are provided company profiles, website links, locations, phone numbers, product videos, and product information. Read reviews and stay informed with product news articles. Whether you are looking for portable EDM, EDM vendors, or EDM tooling of every type, IQS is the premier source for you.

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  • The Southeast's Largest EDM Shop

    EDM We are a premier electrical discharge machining (EDM) shop located in Woodstock, Georgia. John Cater, Sr. and his son John Cater, Jr. founded EDM Technologies in 1988. What started as one machine in a 1,000-square-foot facility is now the largest EDM shop in the southeast United States. We would not be a leader in the world of electrical discharge machining if it was not for our professional staff, state of the art EDM machines, and exceptional client base. Read more......

  • The Possibilities With EDM Cutting Companies

    As companies are able to grow and expand, many are taking advantage of the newest machinery available to help their business thrive. One route in improving production that many companies take is to purchase EDM machines. Electric discharge machining is a method of metal cutting that uses electrodes to essentially melt away the unwanted metal. It leaves a smooth, precision finish while other methods may require additional finishing steps after being shaped. While some companies are unable to begin with these machines because they can be costly, as the company...

  • Advantages of Various EDM Companies

    Electrical Discharge Machining. It is a process you may not hear about it everyday, but you run into its many uses. EDM can be used for car parts, tools, electrical parts and so much more. By using electrical energy it is able to shape metal by essentially melting away the unwanted parts. By cutting and shaping metals with this method, many sizes can be created and they can be done so burr-free. One new way this method has been put to use is in the aerospace industry. In fact, last...

  • Generally Accepted Conventional EDM

    When I hear the word conventional, I think of the guidelines that apply to most people. The word itself means the generally accepted rule or practice. So when I hear conventional electrical discharge machining I understand that it gets a little confusing. For most people electrical discharge machining isn't something we work with everyday. Many probably have never heard of it at all. So it's like saying the conventional method of piloting a rocket ship. Personally, I don't know anyone that has done this. So while there may be a...

  • Wire Cut Company, Inc. - Quality EDM and Outstanding Customer Service

    Wire Cut Company, Inc. has experiences dating back to 1978 and this industry leader offers a multitude of solutions for various applications. This company has a reputation of creating reliable and long-lasting products while putting a focus on their customers' needs. These unmatched solutions are hassle-free and require very low maintenance. Wire Cut Company, Inc. offers a wide range of capabilities including: EDM tool & die, micro hole drilling, R&D prototyping, EDM drilling and much more. These outstanding services are affordable and this forward-thinking manufacturer always keeps your needs in...

  • Conventional EDM

    Conventional EDM is also referred to as Sinker EDM or Ram, and uses an electrically charged electrode to burn shapes and holes into metal components. The removed material is washed away by a continuous flush of dielectric fluid. This process is used for the most part in the tool and die industry. Materials of varying hardness or toughness can be machined in this way as long as they are electrically conductive. Aerospace and electronic applications also use EDM for materials that are difficult to work with, if they have small/odd...

Industry Information
View A Video on EDM - A Quick Introduction

EDM, an abbreviation of electrical discharge machining, is a specialized tooling method that uses electrical energy to cut, drill, etch and machine metal parts. Electrical discharge machining is one of the most accurate types of machining processes as it is able to achieve complex geometries and details especially when using CNC EDM machines to control the process. EDM cutting and drilling is also suitable to be used for both hard materials and extremely delicate materials which are difficult to machine with conventional cutting methods.

Rather than using abrasion or impact, EDM machining erodes the material in the path of the EDM tool using electrical discharges, or sparks created by the electrode which is connected to a power source. The tool electrode forms an arc to the work piece as the two are brought closer together, creating an intense electric field between the two components which is responsible for removing material. EDM is often referred to as spark machining, spark eroding and die sinking. For extreme precision parts, micro EDM is used as it can achieve tooling and machining on very small scales. Wire EDM (or wire erosion) and sinker EDM, also know as plunge EDM, conventional EDM or ram EDM, are the two main types of EDM machining differing in their method of achieving the electrical discharge required. Sinker EDM uses an electrode whereas wire EDM uses a wire, typically made of brass, to transmit sparks to the work piece. Sinker, or plunge EDM is capable of boring holes into metal work pieces, creating holes, patterns and at times three dimensional objects, while wire EDM cuts patterns and shapes. Both are effective methods and are widely used. Small hole EDM is a type of EDM drilling which is also required as a pretreatment for wire EDM in order for the wire to be fed through a part.

Using this process is extremely accurate, reliable and affordable, so it is becoming an increasingly popular choice for many manufacturers. Some of the common applications for electrical discharge machining include producing plastic molds, die casting dies from hardened steel and forging dies which are typically made from hard metals which other machining processes are less effective with. Other purposes for EDM include the manufacturing of engine parts like compressor blades of titanium alloys and nickel based super alloys. Industries that benefit from the use of the electrical discharge machining process include food and beverage, automobile, stamping, extruding, defense, electronics, aerospace and medical. Diverse materials such as the following can be cut with electrical discharge machining: aluminum, copper, zinc, bronze, tin, silicon, titanium, stainless steel, gold, lead, silver, iron, cobalt, nickel, tungsten and many other compounds. Not only is EDM machining capable of accurately cutting these materials, but the preheating of hard metals which is necessary in mechanical tooling is unnecessary with EDM, saving manufacturers both time and money in the cutting process.

The actual electrical discharge machining is accomplished through sparks or electrical discharges that can generate heat anywhere from eight to twenty thousand degrees. A shaped tool, electrode or wire is connected to a power source and used to generate the series of sparks. There is no actual contact between the electrode and the work piece, but rather a conductive path that is established between the two components. This electrical field wears away the surface of the work piece in the desired shape or pattern. The EDM process takes place in a bath of water based dielectric fluid, which prevents premature sparking and flushes away debris. It also conducts electricity between the electrode and the work piece, allowing the unwanted material to be eroded. Both wire EDM and sinker EDM use the same general process, including immersion in dielectric fluid. For wire EDM processing, a hole or perforation must already be made in the metal - this is usually done by small hole EDM; a thin brass wire is fed through the work piece and clamped on both ends by diamond guides, then the wire cuts through the metal in a specified pattern guided by CNC EDM machine arms. Wire EDM is used for cutting shapes through a selected part or assembly. Sinker EDM uses machined graphite or copper electrodes to erode the desired shape into the part or assembly and the process is used for more complex geometries. CNC machines are used to guide, monitor and control the machining process, as well as CAD/CAM software. As well as dimensional factors of size and shape, an important consideration when using EDM is the material of the work piece, since the material of the electrode should be matched.

Electrical discharge machining has advantages over other machining techniques due to its ability to create complex and intricate parts with a high degree of accuracy. This process is able to machine hard materials where other machining processes have difficulties, as well as delicate materials that would break easily under impact. Another advantage of EDM is its ability to machine parts on an extremely small scale. While using this process, the work piece is not deformed from impact because there is no direct contact between the electrode and the material, and likewise the work piece is burr-free after completion and saved from heat damage because very little material-damaging heat is generated during the procedure. It is a time-consuming process and the electrodes need to be replaced often, but the advantages of EDM machining outweigh the drawbacks.

EDM Companies
EDM Companies - DM Technologies, Inc.

EDM Types

  • Double rotating electrodes is an EDM method that uses rotating electrodes to erode a revolving workpiece, creating different workpiece shapes by blending the comparative locations and angular velocities of the workpiece and the electrode.
  • EDM machining uses electrical energy to shape and form metal parts.
  • Electrical discharge grinding (EDG) uses a revolving electrically conductive wheel as the electrode tool for electrical discharge erosion. EDG is an alternative method for sharpening diamond and carbide tipped cutting tools, reducing the extreme cost of diamond grinding wheels.
  • Electrical discharge machining small hole processes use a tool electrode to gradually impress a mirror image of the electrode onto a workpiece.
  • Micro electrical discharge machining (MEDM) is a miniature ram type machine that usually uses a diamond V-groove to spin the tool electrode up to 10,000 rpm. Electrode diameters as low as five microns are possible for the production of micro-holes and other shapes in thin, electrically conductive materials.
  • Micro Wire EDM (MWEDM) processes use a tungsten wire electrode that has a diameter as small as 10µm to machine parts from .1 to 1 mm in size; the size of these parts makes it impossible to form them through normal semiconductor processes. These machines use a specially designed wire movement system, spark generator and monitoring system able to analyze and control extremely low energy levels.
  • Sinker EDM, also known as plunge EDM and ram EDM, removes metal with rapid electrical discharges.
  • Small hole EDM uses electrical discharges to create microscopic holes.
  • Wire electrical discharge machining (WEDM) is a common EDM process that removes material with a wire electrode moving longitudinally through the workpiece. A CNC machine with special software maintains the movement of the wire electrode relative to the workpiece.

EDM Terms

Altered Metal Zone – A mechanically altered zone on a metal surface that is created by the EDM process.

Billet – An uncut block of graphite provided by a manufacturer.

– Slang term for the EDM process.

Capacitor – An electrical unit that stores electricity.

Center Flow – Dielectric fluid that is pumped through the workpiece or electrode for flushing purposes.

Crater – Small holes on the workpiece surface left over from the EDM sparks, also referred to as pits.

Dielectric Fluid – A nonconductive liquid that fills the space between the electrode workpiece and insulates it until the needed space and voltage are reached. At that point, the fluid ionizes, becoming an electrical conductor, and causes the current or spark to flow to the workpiece; it also cools the material and flushes away the particles produced by the spark.

Diametrical Sparking Distance – The difference in size between the electrode and the size of the crater the electrode makes.

Discharge – The spark in the electrical discharge machining process.

Edge Finder – An apparatus initiated by electricity that helps accurately locate the workpiece in relation to the electrode. When any part of a workpiece comes to within about 0.0001 inches of any position alongside the electrode, a buzzer or signal light will alert the operator.

Electrode – The tool used in the EDM procedure, which must be made from an electrically conductive material. The shape and form of the electrode is a mirror of the completed shape desired in the workpiece with dimensional compensation for the overcut.

Eroding – The elimination of material through electrical discharge machining.

Finish – The surface texture in the EDM process, usually expressed as min Ra (U.S.).

Finish Cut – The last cut done on a workpiece. The finer the finish preferred, the more time the finish cut will take, so the rough cuts should be planned to leave just the material the finish cut will remove in order to attain both the final size and finish needed.

Flushing – The forcing of dielectric fluid through the gap for the removal of detritus resulting from EDM.

Gap Voltage – A measurement of the voltage at two different points in one complete cycle. The open gap voltage is the voltage read across the electrode and workpiece space prior to the spark; the working gap voltage is read across the space as the spark current discharges.

Graphite – One of four types of carbon, used for electrode material because of its high resistance to heat. Graphite is the most common electrode material and the simplest to machine.

Heat Affected Zone (HAZ) – The layer below the recast layer. Its metal properties change due to the increased heat exposure.

Off-Time – The time between the sparks in the EDM process.

Overcut – The variation between the size of the electrode and the size of the cavity since an EDM crater is always bigger than the electrode machining it. There are two different types of overcut to take into consideration: total overcut, also known as diametrical overcut (the most common), or overcut per side.

Peak Current – The highest amount of current that is available from every pulse of the power supply.

Recast Layer – A layer that results from melted metal solidifying on the surface of the workpiece.

Roughing (Hogging) Cut – An EDM method that eliminates the most material in the least amount of time.

– The electrical discharge between two conductors.

Spark Gap – The space between the workpiece and the electrode at the point of discharge.

Spark Intensity – The energy that is contained in each spark.

Surface Finish – Comparative smoothness or coarseness of a machined workpiece surface, typically measured in min Ra in the U.S.

Wear – Erosion the electrode undergoes during the EDM process.

Workpiece – Any metal part to which an electrical discharge machining process is applied.

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