Sandvik Coromant's new tooling products reduce machining time, reduce the cost of hobbing gears, maximize product quality and increase machining efficiency.
Transmissions without rotational movement of the gears are unthinkable. Whether it is in construction machinery, automotive power, transportation technology, or in railways, shipbuilding, or even energy production, no gear can work. Just like the manufacture of gears, the drive must be efficient.
In all areas, people want to increase speed, increase run time and reduce noise levels, so the accuracy requirements for gears are getting higher and higher. International competition and the resulting cost pressures have also spurred the search for new energy savings potential and optimized production. Of course, this is also the background and motivation for the development of new processes. In order to find the latest technical standards, the old test-test methods were even evaluated.
One of the most cost-effective and precise gear manufacturing processes is hobbing. For this process, for example in the case of machining a worm gear, the workpiece and the tool are continuously meshed on the hobbing machine. In doing so, the gear hob cuts the interdental teeth and teeth on the workpiece so that they reach the desired shape of the gearbox pair. The use of this process does not produce the source of error that is common in conventional envelope cutting, ie tooth profile deviation and pitch error. This is because the tooth profile in the hobbing process is produced by enveloping the cut generated by the engagement of two objects.
A further advantage of the hobbing process is that in addition to machining the gears, it is possible to create workpieces of other shapes, such as spline shafts or ratchets, as long as they have the same shape and space in the pitch.
CoroMill 170 is a high performance disc milling cutter for large modulus gear teeth machining.
High precision and high reliability when roughing external gears and internal gears
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