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

Mechanical load distribution along the main cutting edges in drilling

“…The same experiments report that the rake angle has a strong influence on the resultant cutting force (noted as stronger than in the case of metals) while the relief angle has little if no influence. In Schulze et al (2011) it is noted that the inclination angle (oblique cutting) has little influence on the specific cutting forces (horizontal and vertical directions) for short glass fiber reinforced polyester, although forces in the lateral direction were not measured.…”

“…In the current study configuration of only up to 4 empirical coefficients are presented which show good results. Apart from the well know strong influence of the rake angle and the minor influence of the cutting speed, the specific force coefficients for composite materials are also believed to be influenced by the fiber orientation (Hinze et al, 2011) and cutting edge rounding (Schulze et al, 2011;Faraz et al, 2009). In the current model the influence of the rake angle is accounted for; the influence of the cutting speed is evaluated from experiments on composite materials as being too small and therefore ignored, while the effects of edge rounding and fiber direction are not modeled at the current stage.…”

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

“…Multivariate regression models for the specific force components have been calculated from the experimental data using a power function approach separately for the two different cutting edge engagement conditions of r b /h \ 1 and r b /h [ 1. A detailed description of the approach as well as the model parameters for the machining of short glass fiber reinforced polyester are presented in [17]. These mathematical regression models allow calculating the actual process forces for a (temporarily) constant set of variables (r b , k, h, v c , w).…”

“…9c. The calculated ratio is based on multivariate regression models which have been developed experimentally and published in [17]. Both, the kinematic simulation as well as the process force plot are determined for short glass fiber reinforced polyester obtained by a sheet molding compounding process (SMC).…”

Mechanistic force modeling for milling of carbon fiber reinforced polymers with double helix tools

“…Karpat et al [6] proposed a fiber direction angle based mechanistic machining model for uni-directional CFRP laminates and showed that it can be extended to calculate milling forces in multi-directional CFRP laminates. Schulze et al [7] experimentally calculated specific cutting forces on glass fiber reinforced plastics for various levels of process inputs such as cutting velocity, cutting depth, etc. which can be used in tool geometry optimization studies and machining strategy selection.…”