Machining strategies for hole making in composites with minimal workpiece damage by directing the process forces inwards

High performance cutting of advanced aerospace alloys and composite materials

“…The concept of intermittent cutting through orbital drilling (OD) is based on using high-speed machining to eliminate some of the existing problems in conventional drilling (CD); namely, [193]. 37.…”

Specific machining forces and resultant force vectors for machining of reinforced plastics

“…Optimizations usually aim at reducing the forces by means of special tool geometries for drilling and milling [4,5] or adapted machining strategies such as circular milling [6]. Process strategies which are designed to direct resulting process forces toward the center of the workpiece when machining composites showed significant reduction in workpiece damages [7].…”

A voxel-based kinematic simulation model for force analyses of complex milling operations such as wobble milling

“…Two milling strategies, which follow a different basic approach, have been investigated by Schulze et al [10,11]: a combined circular and spiral milling process as well as the five-axial process of wobble milling. These machining strategies aim not only at reducing machining forces when machining the workpiece's top layers, but at directing the resultant process forces toward the center of the workpiece.…”

“…The process of wobble milling for hole making has been thoroughly investigated experimentally for the machining of a short glass fiber reinforced polyester [11] and a carbon fiber reinforced epoxy laminate (0°/90°, thickness 3 mm). The results have been compared to reference processes such as circular milling.…”

“…Process and tool parameters correspond to the parameters used for the experimental process evaluation (maximum tool inclination, maximum feed) as described in [11]. Figure 9a shows plots of the determined cutting thicknesses for each of the four defined POIs per timestep.…”