Wire EDM Improves Positional Accuracy
IMTS 2018: Makino’s UP6 Heat Wire EDM is designed for precision stamping and fine blanking applications.
Makino’s UP6 Heat wire EDM is designed for precision stamping and fine blanking applications. It is also suitable for die tooling for electric motor stators. The machine features a stationary work table designed to improve positional accuracy, and it uses a programmable, rise-and-fall, three-sided work tank that improves ergonomic access to the work zone. This configuration also simplifies requirements for automation.
Several features are designed to improve long-term thermal stability, including integration of the dielectric fluid reservoir into the base casting of the machine. Chilled dielectric fluid is circulated through the machine’s casting to facilitate active thermal cooling and maintain machine temperature. The machine uses a Hyper-i control with a 24" HD touchscreen, which comes with the HyperConnect Industrial Internet of Things (IIoT) network-connectivity function for remote machine monitoring.
A wire-drive system uses AC motor tensioning, which expands the range and stability of wire tension and reduces maintenance requirements. A wire-threading system provides both jet and jet-less threading modes. It can rethread the wire in the gap at a break point.
Originally, wire EDM had two things going against it. It was slow, and often it left an undesirable surface finish. In the last few years, wire EDM builders have fixed the speed problem. Now they're well on their way to fixing the surface finish problem.
A shop specializing in wire EDM for large mold components now offers EDM “turning” of small, intricate parts. Despite the potential risks involved in early adoption of new technologies, the shop believes this practice gives it a leg-up on the competition and lets it gain experience with alternative machining techniques before offering them to customers.
Wire EDM units that swivel a horizontally guided electrode wire in a CNC-controlled E axis give this shop the workpiece clearance and flexibility to produce complex, high-precision PCD-tipped cutting tools.