Sandvik Coromant skiving and roller burnishing tools slash hone machining times
1 min read
Sandvik Coromant has introduced a range of skiving and roller burnishing tools that, it says, allow manufacturers to finish cylinder bores in machine times up to 90% less than conventional honing techniques.
Sandvik Coromant skiving and roller burnishing tools also offer machine shops process security for producing a true, round bore. Designed for the machining of hydraulic and pneumatic cylinders over a diameter range from 38 to 305.9 mm, the tools produce precision tube finish diameters from entrance to exit.
Separate skiving and burnishing operations help minimise the power requirement and feed force. On the forward stroke, skiving at high feed prepares the bore for burnishing, while on the return stroke, roller burnishing takes place with the skiving inserts retracted to retain the high quality bore surface. Having separate operations also means that feeds and speeds can be individually optimised.
Roller burnishing, a method of cold working metal surfaces to induce compressive residual stresses, produces mirror-like surface finishes of 0.05-0.20 Ra. The process is designed for all common extruded tubes, including seamless and drawn-over mandrel (DOM) types. The Sandvik Coromant tools can be used on deep hole drilling machines or honing machines – a machine tool with forward and reverse feed options providing optimum performance and highest machine utilisation.
The inserts are based on grade GC1025, a high performance, PVD-coated, micro-grain carbide.
