Force out

Developed for the accurate machining of small round workpieces on Wire EDM machines,

When the boundaries of conventional machining have been reached EDM turning and grinding is a viable alternative because the process exerts no machining force on the workpiece making it possible to accurately machine small and fragile parts with repeatable quality.

Typical of the sectors making use of advanced WEDM turning and grinding technology are the medical and micro moulding industries – the former to meet demanding requirements for the manufacture of minute surgical implants and small tools that enable less evasive surgery to take place, and the latter to satisfy consumer requirements for smaller electronic devices.

According to Hirschmann, its units are being used successfully on many makes of EDM machines, including Agie, Charmilles, Fanuc, Mitsubishi and Sodick.

Prompted by demand from the company's diverse customer base, and in an effort to further extend the its technological advantage, Hirschmann has recently developed new technology that combines a high precision rotating spindle and an NC controlled dividing table. The Hirschmann H80R.MNC rotating and indexing spindle has a rotating speed of up to 1,000rpm, indexing accuracy of ± 5'' with a radial run out of less than 0.003mm.

Prior to the launch of the H80R.M, rotationally symmetrical workpieces needed to be machined on a rotating spindle, then transferred, clamped and re-aligned on a dividing table, to allow the machining of the components' surfaces and outlines of other angular features. The Hirschmann H80R.MNC effectively eliminates the requirement for companies to purchase a separate rotating spindle and an NC dividing table.

Hirschmann has also equipped the H80R.M with an effective workholding system with each spindle being equipped with a manual or pneumatic Hirschmann chuck. Connected to this standard interface is a newly patented, adjustable clamping element that can be used alongside the conventional collet chuck which allows workpieces up to 20mm diameter to be clamped, whilst radial runout and concentricity can be adjusted to a value of less than 0.001mm. The introduction of a presetting spindle means that components can be set-up offline, whilst the machine is in operation, leading to a significant increase in productive machine hours.

Hirschmann Engineering UK
www.hirschmannengineering.co.uk