Chapter 11 Variants of high speed machining
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| Chapter | 11 297 Compared to conventional milling and machining with the HSM technology, it enables the manufacturer to shorten the time of workpiece machining. The production time of the frame (involving software preparation) is 320 hours. It is possible to decrease the frame production time to 15 hours in mass production using the experience obtained during the proven control program and prototype production. The frame roughing time is approximately 18 hours, and the finish takes approximately 5 hours, whereas it takes approximately 23 hours to produce the frame by employing the HSM technology. When the HSM technology is compared with traditional processing technologies, approximately 141 hours are required to produce the frame by conventional milling. The finished part represents an integrated structure that modifies the production technologies of the same part as a result of the plastic processing of individual parts (30 parts or more) and then as a result of connecting them with the connecting elements. The total production time of the individual elements of the frame was six times higher in comparison with the production time of the suggested HSM technology. At the same time with the advantages of reducing the production time of the frame, the advantage of the advanced technology is the accuracy and quality of production in addition to the roughness class of the surfaces Roy et al. [36] examined the effect of carbon fiber reinforced polymeric (CFRP) composite materials, which are commonly utilized in automobile, aerospace, and biomedical sectors because of their weight ratios, corrosion resistance, and high strengths, on the cutting power of cutting parameters and the effect of material on machinability and deformation properties of sawdust mi- crostructure. In this study, the cutting parameters of the CFRP such as orthogonal HSM, cutting speed and feed rate were changed at high cutting speed/feed rate ranges of up to 346 m/min/0.446 mm/rev. The shear forces (main shear, feed, and thrust) of the shear parameters and their effect on chip microstructure were analyzed. It was observed that higher feed rates and lower cutting speeds have a considerable effect on chip segmentation pattern and thrust forces. Cai et al. [37] conducted the experiments on surface roughness during the processing of Al 7075 under different cutting conditions. The measurement of the surface roughness values was performed in two directions, perpendicular to the feed, and parallel. The mean surface roughness, Ra, was determined by making measurements at three different points on the processed materials. As a result, low Ra values were obtained in the vertical direction. A conclusion was reached that the feed rate and the depth of the cut parameters, the cutting speed, in particular, significantly influenced the surface roughness. The third industry is the casting mold sector that involves working with hard material finishing [2] . In the mentioned industry, high accuracy and high speed processing of materials are critical. HSM is used in molding molds. Because most of the casting molds are made with tough tool steels and have a medium or small size, HSM can be used efficiently. Most tattoo molds are also suitable for HSM, as they have a complex shape. The surface is robust and generally prone to crack formation. Due to their small size, injection and blow molds are |