Analysis of contact between insert and tip seat

During development work of new tools with cemented carbide inserts it is very important to have knowledge and understanding of how cutting forces and insert clamping forces are distributed on the common contact surfaces between insert and tip seat. The reason is that it becomes easier to design the insert and tool to prevent that plastic deformation and fatigue failure occurs and to ensure good function.

The purpose of this report is to show how pressure and shear stresses distributes on the contact surfaces between the insert and the tip seat in the tool. This is done with a simulation model. Finite Element Analysis is used to solve the problem. The analyses are made with both a two-dimensional and a three-dimensional model. The two-dimensional model is compared with an analytical model.

The results from the analyses show that no plastic deformation occurs in the tool holder. The results are very sensitive to the element density, which makes it difficult to evaluate the results. More elements used gives a more accurate result but also a longer solution time.

Author: Wikgren, Thomas

Source: LuleƄ University of Technology

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