The power skiving solution from Sandvik Coromant comprises solid bore, solid shank and indexable cutters. CoroMill 178S (solid carbide) is for use in applications where high volume, high rpm machining with long tool life is required, while CoroMill 178H (powder metallurgy HSS) is for general use on shoulders or small diameters. These tools offer the highest tool accuracy regarding run-out and pitch compared with indexable tools, providing a better finishing profile of the gear and spline. Reconditioning can typically be performed up to 10 times depending on the quality of the tool.
CoroMill 180 indexable cutters are for high-volumes, roughing on large range of gears (module 2-9). Among many notable features is a positive rake angle for light cutting action and the potential for dry machining, which saves on coolant costs and helps to protect the environment.
“The power skiving cutter selection can provide both high output and an optimized finishing profile,” says Harish Maniyoor, Global Product Manager, Industry Segment Automotive at Sandvik Coromant. “Coupled with the ability for one set-up machining, the tools improve quality, and save time and cost. In fact, cycle time reductions of circa 50% can be anticipated compared with gear shaping, helping to reduce the cost per component considerably. It is also worth noting that skiving is more flexible than hobbing for producing new, compact automotive transmissions.”
All tools are made as engineered solutions to fit precise customer needs. With the correct design, process at production levels will prove up to 15 times faster than shaping, and more flexible than broaching with better quality. The development also brings greater process flexibility to end customers, moving production to in-house machining centres and away from dedicated machine tools at suppliers. Moreover, process reliability will increase, with fewer unplanned stops.
Among those set to benefit most are manufacturers in the automotive industry, as the tools support new developments in hybrid cars, as well as electromobility for cars, trucks, tractors and excavators. Typical applications include internal and external gears and splines – and cylindrical spur and helical gears – for automotive transmissions, as well as a variety of other gears, coupling components, splines, shafts, synchronization rings and CV joint parts.
Part of global industrial engineering group Sandvik, Sandvik Coromant is at the forefront of manufacturing tools, machining solutions and knowledge that drive industry standards and innovations demanded by the metalworking industry now and into the next industrial era. Educational support, extensive R&D investment and strong customer partnerships ensure the development of machining technologies that change, lead and drive the future of manufacturing. Sandvik Coromant owns over 3100 patents worldwide, employs over 7,900 staff, and is represented in 150 countries.
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