NEWSLETTER 2007-02

Application of the month - 2007-02

High score for technical merit on overhangs of over 8xD

Precise milling when machining long overhangs is a challenging task for machinery and tools alike. Since the forces acting on the tools – and consequently the bending forces – increase with ever greater depths, a production strategy is required to run the operations economically.

In order to achieve the best possible machining results on the die plate supplied by the company Formentechnik Bayreuth, a combination of ASR Pico (roughing work) and ARPF (pre-finishing and final finishing) was chosen. The specification we were given to follow involved shortening the workpiece machining time without compromising the quality.

The specification was met by choosing the optimum tool for the job which enabled the spindle load to be kept at a minimum at all times. For the same reason, the tools showed no signs of wear and tear and could even be used immediately on another job after running non-stop for 400 minutes without showing any signs of deterioration. With an overhang of 210 mm during the finishing work, the groove recorded peak taper values of just 0.002 mm.

In contrast to the company's own trial machining runs, a Hitachi Tool application engineer was able to cut the machining time by a further 30%. To do so, our employee consulted a database comprising several hundred application reports which encompasses the collective experiences of Hitachi Tool users from the tool-making and mould-making sector. When all is said and done, with the right milling strategy and advice from Hitachi Tool, users can save time and money (see also our Microsite Production50^®).

 

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