Double-roller tool is used for rolling crankshaft fillets (roller burnishing) on CNC lathes.
While rolling the crankshaft fillets tensile residual stress is reduced, surface roughness is improved and surface cold working is created.
Maximum rolling force 120 kg.
The device can roll a hardened layer on the workpiece surface with a depth of up to 0.05 mm.
Rollers are made of die steel. Supplying abundant coolant to the deformation zone is mandatory.
Double-roller tool is installed in the turret head of the CNC lathe machine center or tool post of the conventional lathe.
Workpiece surfaces are rolled to an accuracy of Ra 0.1 using speed rates corresponding to finishing methods.
Maximum hardness of the workpiece to be machined 43 HRC .
The presence of an elastic elements ensures a constant rolling force at any point on the work surface.
Double-roller tool is simple and versatile, but requires a significant working force which is fully absorbed by the machine's assemblies.
The change in surface size during rolling is caused by volume deformation of the workpiece due to micro-roughness elimination.
The reverse stroke should not be used as a working stroke, since repeated passes in opposite directions can result in excessive deformation of the surface layer.
Deep rolling increases the fatigue limit of parts by 80% or more, having a favorable effect on part performance.
Reducing machining costs
Exclude nonproductive operations and auxiliary equipment items.
Burnishing on CNC lathe machine centers and conventional lathes.
Finish the surface from Ra 0.6 to Ra 0.1.
Economical tool life with die steel rollers.
Roller burnishing is a surface finishing technique in which hardened, highly polished steel rollers are brought into
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reduced machining costs reduced machining costs reduced machining costs cost reduction in metalworking cost reduction tools cost reduction tool chipless machining Machining metals without chip removal reduce metalworking costs Reduce auxiliary time Reduce production costs Improvement of metalworking quality removal of residual mechanical stresses Reduction of production costs Reduction of direct costs for cutting tools Reduction of direct grinding and polishing costs Reduction of set-up time Reduction of set-up time cold working of metals without chip removal production savings process optimization
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