Plunging – The patented time saver 22:43

One big break through of hard turning was patented by Seco in 2001. That was plunging, a true productivity booster. It reduces the time in cut up to 90 %, but is also improves surface quality. General turning generates a spiral pattern which is dependent on feed and corner radius, which sets the surface finish. By using plunging, the surface topography is set by the whole cutting edge and is dependent on the quality of the cutting edge.

Solid inserts or full face inserts are needed to be able to use plunging as a method since long cutting edges are needed. Conventional holders are not suitable for plunging due to clearance angles. Separate plunging holders are therefore needed.

The residual stresses after plunging are compressive both in the tangential and axial direction, which are beneficial to the fatigue properties of the component. Ground workpieces show tensile residual stresses deep below the surface before changing into compressive residual stresses at the surface.

Overall, plunging has great potential for decreasing manufacturing costs, and the surface integrity of the workpiece is superior to conventional hard turned or ground parts.

For more information, please contact your local Seco representative, or our Advanced material (PCBN/PCD/CERAMIC) team.

Author: Stefan G Larsson Product Specialist SECOMAX PCBN/PCD/CERAMIC SECO TOOLS AB 737 82 Fagersta, Sweden Office +4622340572 Mobile +46761367807 e-mail:stefan.g.larsson@secotools.com