Combined hobbing and deburring tool
LMT's Fette division has developed a combination hobbing and deburring tool for gear cutting that enables the functions of a roughing hob, the deburring of the top and bottom flanks of each tooth and the finishing of the gear into a single high productivity operation that reduces the demand for other operational equipment and provides the means to significantly reduce production lead times.
Available through LMT (UK) of Coventry, the multi-functional Twist-Free Hob enables finished spur and helical gears to be completed in a single hobbing operation using a standard CNC hobbing machine with each of the cutters mounted on a single arbor.
In addition, the new tool system, that was developed in conjunction with gear cutting machine specialist Liebherr Verzahntechnik, eliminates tooth flank 'twisting' or convexity error, one of the major drawbacks when hobbing helical gears, that creates the need for correction and separate finishing operations.
The new tooling system also improves production lead time by combining separate operations into one as well as any requirement for special gear finishing tooling. It contributes to smoother running of the gear as well as helping to reduce transmission noise.
