2 Wire EDM Fundamentals（2 Wire EDM基本面）.pdfVIP

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2 Wire EDM Fundamentals（2 Wire EDM基本面）.pdf

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2 Wire EDM Fundamentals（2 Wire EDM基本面）

35 2 Wire EDM Fundamentals Revolutionizing Machining Wire Electrical Discharge Machining (EDM) is one of the greatest innovations affecting the tooling and machining industry. This process has brought dramatic improvements to industry in accuracy, quality, productivity, and earnings. Figure 2:1 shows various wire EDM machines. Courtesy Makino Courtesy Agie Charmille Courtesy Mitsubishi Figure 2:1 Wire Electrical Discharge Machines 36 Complete EDM Handbook Compliments of www.ReliableEDM.com Before wire EDM, costly processes were often used to produce finished parts. Now, with the aid of a computer and wire EDM machines, extremely complicated shapes can be cut automatically, precisely, and economically, even in materials as hard as carbide. See Figure 2:2. Wire EDM Beginnings In 1969, the Swiss firm Agie produced the worlds first wire EDM machine. Typically, these first machines in the early 70s were extremely slow, cutting about 2 square inches an hour (21 mm2/min.). Their speeds went up in the early 80s to 6 square inches an hour (64 mm2/min.). Today, machines are equipped with automatic wire threading and can cut over 20 times faster than the beginning machines. A remarkable turnaround. Traveling Workpiece Wire