Ona Increasing surface quality, productivity and precision
Spain – Specialist in large, cusomised EDM machines, Ona, has launched the ONA QX series.
The die-sinking EDM machines are said to increase productivity and surface quality. The QX series features a fully digital generator. According to the company, the machines increase productivity in finishing operations, both with copper and graphite electrodes. Furthermore, major improvements in the homogeneity of the roughness on large surfaces are said to be achieved by the new QX series. In the mould sector, where machining of deep and narrow grooves with difficult cleaning conditions is common, there has been up to a 50% increase in productivity with no increase in electrode wear, ONA notes.
According to the company, the productivity boost of the QX machines is linked to the reduction in electrode wear – up to 500%, depending on the application. This allows for cost savings and simplifies many jobs where previously it was necessary to use two electrodes but for which one is now sufficient. The reduction in electrode wear enables QX machines to obtain cavities with a high aspect ratio and to improve the precision in micro-cavities, ensuring operations of up to 5 microns in the inner radius of corners compared to 15 microns in previous generation machines.
The fully digital generator offers flexibility to adapt the technology to special and specific applications. The generator has been developed also for the demanding quality requirements in the aviation / aerospace sector, where very hard materials such as nickel and titanium-based alloys are used. The minimum final roughness that the generator can obtain is 0.08 µm Ra.
The ONA QX4 features travels of 600 mm x 400 mm x 400 mm. The larger QX Modular machines have a modular and versatile design, allowing customers to configure individually from a selection of 40 different standard configurations, the supplier explains. The QX10, the largest in the Modular series, has an x-y-z travel of 3000 mm x 1500 mm x 1000 mm and permits a load of up to 25 tons. All QX Modular machines can have up to two heads controlled by separate CNCs to provide independent machining of two cavities simultaneously on one large piece.
Additionally, the QX series' CNC can control up to eight axes simultaneously. It features an open architecture to enable the full integration into customers' management and control environment.