All categories
Featured selections
Trade Assurance
Buyer Central
Help Center
Get the app
Become a supplier
(2015 products available)
Used EDM machines are utilized to carry out electrical discharging machining. It is a modern machining method that relies on electrical sparks to separate materials.
The main types of used EDM machines include wire-cut EDM machines, ram EDM machines, and sinker EDM machines.
Wire-cut EDM machines:
Wire EDM machines use a continuously moving and controlled wire to cut workpieces. The wire acts as an electrode and creates sparks that erode the material. Wire-cut EDM machines can cut workpieces in various shapes and sizes. In addition, they offer high-precision cutting, making them suitable for complex shape machining and precision part manufacturing.
Ram EDM machines:
In general, ram electrodes are previously shaped into the desired part geometries. Then, the previously shaped electrodes are submerged in a dielectric fluid. Finally, an electrical current is sent through the dielectric fluid, which then removes material from the workpiece to create the final shape. As a result, ram EDM machines can produce parts with very tight tolerances and smooth surfaces quickly and efficiently. They are also capable of machining hard materials that are difficult to cut with conventional methods. However, the main limitation of ram EDM machines is that they can only cut materials that are electrically conductive.
Sinker EDM machines:
Sinker EDM machines use a specially shaped electrode to cut and form materials. Those electrodes are made of materials like copper or graphite. The machine then forms the workpiece by submerging the electrode into a dielectric fluid and passing an electrical current between the two parts. Sinker EDM machines are ideal for making cavities, blind holes, and complex internal features. They provide high accuracy and smooth surface finishes.
The specifications for used EDM machines for sale differ per type and brand. The machines will have a specific cutting diameter and, in most cases, a cutting length of more than a meter. Some of the used wire-cut EDM machines can precisely cut within approximately 0.001 mm to 0.025mm. The thickness of materials ranges from a few millimeters to several centimeters. Usually, the wire-cut used EDM machines are available in sizes that range from small to large that can cut up to a meter or more. The used sinker EDM machines are usually small to fit into tighter spaces but can also be large industrial sizes.
All electrical parts must be cleaned in the washing tank with cleaning fluid. The parts are then blown dry with compressed air. When reassembling parts, a minimal amount of lubricant should be put on the guide rails, ball screws, and sliding surfaces, but none should be put on the insulating parts. The inspection and maintenance schedule should be followed. The maintenance person should pay close attention to the cooling water and electrolyte fluid levels and any abnormal noises or conditions. All fasteners should be checked to see if they are still tightened as per the specification. All sliding and moving parts should be lubricated as per the manufacturer's specification. The hydraulic system should be checked for any leaks to ensure it works properly. The marble or granite base and the tanks should be cleaned of any debris or buildup once the used EDM machine is utilized.
Die-Making Industry:
The die-making industry widely employs used wire EDM machines. EDM machines are instrumental in cutting and shaping complex materials. Wire EDM machines also create intricate cavities, punches, and molds with high precision. These typically have tight tolerances and require detailed work that involves delicate cutting and high-accuracy machining. The used wire EDM machines are therefore convenient, capable, and cost-effective tools for the die-making industry.
Manufacturing Sector:
A wide range of manufacturing industries use EDM machines extensively. The machine is a staple in the sector that works with tough metals and materials. Automotive, aerospace, and electronics industries, to name a few prominent ones, use EDM machines for producing high-precision parts. The machines create holes in various shapes and sizes, as well as complex geometries on such parts. Used EDM machines are well suited for this because businesses can enjoy automation and faster production at a lower cost.
Tool and Die Fabrication:
Used EDM machines are valuable for tool and die fabrication. Machinists frequently rely on used Electrical Discharge Machines to create precise cutting tools, molds, punches, and dies.). These machines can cut very accurately and make complex forms, ensuring a perfect fit and operability of the tooling components. The affordability of secondhand EDM machines makes them suitable for small or medium-sized fabrication workshops and businesses.
Prototype Development:
Using an EDM machine, designers and engineers can produce prototypes and test designs quickly. Prototyping involves producing parts and components to test functionality, refine the design, and validate concepts. The machines can quickly and affordably cut difficult materials into complex shapes for prototype development and part creation EDM machines allow for rapid iterations. They expedite the prototyping process, shortening the time from concept to verification. Used EDM machines are sufficient for preliminary prototype development but may not replace production-level machines.
When it comes to considering buying a second-hand electric discharge machining tool for sale, there are a number of factors that are critical to ensuring a good purchase. One such important point is to look for any wear and tear. Since these machines usually have high operating hours, the most important factor to consider is if there is any sort of damage that affects the part's functioning of the machine.
Wear parts are usually parts like guides and bearings, the pump, filters and hydraulic hoses, and O-rings and seals. They usually affect the used wire EDM machine's accuracy and smooth movement. This can cause any resulting error or problem during the work on the piece or work on it entirely smoothly and accurately. Another important part that may need to be looked at further is the transformer and rectifier, the power supply part of any EDM machine.
Another important thing wholesale buyers need to look for is the used EDM machine's cutting speed and accuracy. Sellers should know the cutting speed and accuracy of the used machining tool and disclose this information to potential buyers so they can make an informed decision. If the product has slow cutting speeds and poor accuracy, buyers will not want to buy it. The main reason buyers are interested in used EDM machines is that they are three times faster but also smooth and accurate at cutting.
An advantage of used EDM devices is usually the software used to run them. Most electric discharge machining devices now come with CAD CAM software to help seamlessly integrate the design and working processes into one fluent movement. Another thing to look for is the software in the used machine. If it is advanced and upgraded in years, it can be a selling point to potential buyers.
Q1: Is it safe to buy a used CNC EDM machine?
A1: Yes, it is safe to buy a used CNC machine if one inspects the parts, checks the maintenance records, and demands a test run before buying.
Q2: What are the current trends in the used CNC machine market?
A2: The market for used CNC machines is emerging as an attractive alternative because, unlike new machines, they offer faster integration and lower costs.
Q3: What is the main benefit of a used CNC EDM drill?
A3: The ability to machine hard metals, including exotic metal alloys, make them ideal for creating complex shapes, such as internal contours, delicate, deep, and narrow cavities, all with a great level of precision.
Q4: What are the代used CNC machines available?
A4: Apart from the EDM machines, several other used CNC machines are available, including lathes, routers, plasma cutters, and bending machines.
Q5: What factors influence the pricing of used CNC machines?
A5: A few things impact the pricing of a used CNC machine, such as demand and supply, the machine's age and condition, its specifications, the presence of any defects or required repairs, and comparable sales.
