THE EFFECT OF STIFFNESS OF THE SUPPORT ASSEMBLY ON THE WORKLOAD OF THE CUTTERS BITS
It was established experimentally that the axial load is distributed unevenly on the crowns and the cutter bits. The greatest load average perceive the crowns. One of the factors contributing to this irregularity is the rigidity of the reference node of the milling cutter, changing depending on the radius of application of force. The results of analytical studies of the vertical rigidity of the node of the milling cutter, mounted on three ball bearings on the trunnion with deformable into account contact deformation of bearing components. To verify the results of analytical calculations experimental measurements of vertical movement of the cutter bit in contact with the bottom teeth different crowns. Analytical and experimental results correlate well and suggest that the vertical stiffness of the roller node has a maximum value when in contact with the bottom of the middle frame sets of the milling cutter. This is due to the fact that the load perceived by all three bearings, which is confirmed by research on the model of the support Assembly, made of optically sensitive material. The obtained results can be used to optimize the design of the arms and bearings of roller bits under design.