LMT has installed five-axis simultaneous-machining centres and a turn-mill centre worth over GBP3.5m at LMT Fette's Schwarzebek manufacturing facility in Germany. LMT's Nanosphere coating acts as a heat shield but reacts elastically to protect the cutting tool from high thermal and mechanical stress. As a result, LMT Fette gear hobbing cutters can be run without coolant and should achieve a realistic increase in production life of at least a third over normal coated hobs.The Twist-Free combination hobbing and deburring system enables the functions of a roughing hob, the in-cycle deburring of top and bottom flanks of each tooth and the finishing of the gear to be achieved in a single high-productivity cycle.
The single-arbour tool assembly can be applied to the hobbing of spur and helical gears and eliminates tooth-flank 'twisting' or convexity error that normally requires correction through separate finishing operations such as shaving, or grinding or honing in the hardened condition.
