Sleipner soğuk iş takım çeliğinin tornalanmasında kesme parametrelerinin kesme kuvveti, yüzey pürüzlülüğü ve talaş şekli üzerine etkisinin incelenmesi

Abstract

Processing with turning method of sleipner cold work tool steel  Investigation of the effects of cutting parameters on cutting force components  Determination of optimal cutting parameters for minimum cutting force and surface roughness and examination of formed chip shapes Sleipner cold work tool steel has high abrasion and compression strength, high toughness, high dimensional stability during heat treatment, weldability and easy machinability. Sleipner steel is widely used in plastic injection and sheet metal molds, in manufacturing of plastic and punching blades. In addition, the fact that it is suitable for surface coating techniques such as TiN, CrN by PVD method has led to its widespread use in industrial applications. Due to the high surface quality and dimensional stability required in the mold industry, critical machining operations are preferred. The demand for high surface quality and dimensional stability after machining it is important to predetermine cutting parameters. Since high surface quality and dimensional stability are desired after machining, it is necessary to determine the cutting parameters in advance. It is therefore important to determine machining parameters such as appropriate cutting speed, feed rate and cutting tool geometry. Figure A. Variation of main cutting force and surface roughness depending on cutting speed and feed ratePurpose: In this study, Sleipner cold work tool steel was turned using different cutting parameters. The effects of cutting parameters on cutting force components and main cutting force, chip shapes and surface roughness were investigated experimentally. Theory and Methods:A KISTLER 9257B type piezoelectric dynamometer, which can measure the cutting force components at the same time, was used for the measurement of the cutting forces in the turning experiments. Signals from the dynamometer were transmitted with the KISTLER 5070A multichannel amplifier. Measured cutting force components were converted to numerical values with DynoWare software. At the end of the turning tests, the roughness values of the machined surfaces were measured with Mahr Perthometer M1. The abrasion of the cutting tool was examined by scanning electron microscope (SEM). The insize ISM-PM200SB digital microscope was used for the examination of chip shapes. Results:Cutting force components increased with increasing amount of feed rate and cutting force components decreased with increasing cutting speed. The lowest cutting force was obtained at 359,6 N in 100 m/min cutting speed and 0,1 mm/rev feed rate. The highest cutting force was measured at 921,3 N in 50 m/min cutting speed and 0,3 mm/rev feed rate. Among the machined surfaces the lowest surface roughness was obtained as 0.97 µm at 150 m/min cutting speed and 0.1 feed rate. The highest surface roughness was found to be 5.12 µm at 50 m/min cutting speed and 0.3 mm/rev feed rate. In the parameters in which the lowest cutting force and surface roughness were measured, chip shapes were similar to spiral type chip shape. Conclusion:In ...

Multiple Optimization of Cutting Parameters Affecting Kerf Formation and Surface Roughness in Laser Cutting of Al 5052 Alloy

“…The numbers in the cell where the regression row and the contribution column overlap indicate the total % effect of the cutting factors. If P <0,05, we can say that the model is meaningful [22]. In Table 6, total P values for KWT, KWB, KT and Ra appear to be less than 0,05.…”

Investigation of the effect of minimum quantity lubrication (MQL) on cutting forces and surface roughness in turning of AISI 1050 steel

“…Artan kesme hızları ile kesme bölgesi sıcaklığının arttığı ve bunun sonucu olarak plastik deformasyonun kolaylaştığı bilinmektedir. Ayrıca literatürde bu durum artan kesme hızı ile birlikte kesici takım ile talaş temas alanının azalması ile de açıklanmaktadır[25,26]. Kesme hızının artışı ile kesme kuvvetleri düşerken kesme hızının 460 m/dak'a çıkması ile birlikte kuru kesme şartlarında kuvvetlerde bir artış söz konusu olmuştur.…”