Studi Eksperimen Pengaruh Variasi Besaran Sudut Buang Dan Sudut Bebas Menggunakan Pahat Tepi Rata Dengan Material Pahat HSS Terhadap Kekasaran Permukaan Pada Proses Pembubutan Benda Kerja Dengan Material Benda Kerja St 41

A good level of surface roughness as one of the benchmarks for turning the workpiece is said to be of high quality. As a cutting tool, lathe chisels need free angles and exhaust angles according to the desired specifications. This study aims to determine the effect of variations in the size of the tool angle and how much free angle and exhaust angle are best used on the surface roughness of St 41 steel. The study was conducted using a lathe brand Bemato series 44376 with process parameters consisting of a spindle speed of 280 m /min, the infeed depth is 0.8 mm, and the infeed speed is 0.040 mm/rev. The research method used is an experimental method and the results of the turning process are measured the level of surface roughness using a surface roughness tester. Based on the results of the specimen measurements, it is found that there are differences in surface roughness produced by variations in the free angle (α) and exhaust angle (β). As for the lowest roughness value of the whole specimen turning process is in the turning process with variations in angle 6° and angle sudut 10° with a surface roughness value (Ra) of 2,555 m.

Analysis Of The Effect Of Slope Of The Scratch Side Angle Through The Post Tool On Surface Level Surface At The Working Tool Stermination ST 37

The purpose of this research is to see the effect of slope of incision angle chisel through Tool Post to roughness of surface of object. The method used is a lathe ST 37, with 0.5 mm cutting depth, with side angle cutting angle by tilting the Post Tool, ie: 10˚ tilted to the left, 10˚ tilted right, 0˚ (perpendicular), 5˚ tilted right, and 5˚ tilted left. Feeding (constant feeding) is: 0.281 mm / rotation, main cutting corner of chisel 80˚ and cutting speed = 740 rpm. Then the workpiece measured the surface roughness by using Surface Tester Mitutoyo SJ-201P. The result showed that, the smallest surface roughness rate achieved was (ΣRap) = 7, 42 μm with N9 surface roughness class with the Post Tool angle 5 ° to the left. While the largest surface roughness rate achieved is (ΣRap) = 13, 76 μm with the surface roughness class N11 with the tool angle post 10 ° to the right. The value of the roughness level achieved is between N9 - N11.

Research on a Method of Cutting Tool Angle Conversion

This paper explores a method of conversing the cutting tool angle between the different reference systems, and this method is based on geometric method. A variety of different type of cutting tools can be induced to a simple module through this method. The paper obtains the general angle calculation formulas.

Effect of Tool Angle on Friction Stir Welding of Aluminum Alloy 5052: Role of Sheet Thickness

The technique of friction stir welding (FSW) does offer several advantages over conventional welding techniques. In this paper is presented the results of an investigation aimed at understanding the effect of tool angle on welding of sheets of commercially pure aluminum and aluminum alloy AA5052-H32 having different thickness. The present study demonstrates the feasibility of using friction stir welding (FSW) for joining two different thickness sheets of commercially pure aluminum (t = 1.5 mm and t = 2.0) with sheets of aluminum alloy 5052-H32 having thickness of 1.6 mm and 2 mm. It was found that the tool angle does play a major role in the welding of sheets having different thickness. Formation of the FSW zone was analyzed both macroscopically and microscopically. The tensile properties of the joints were evaluated and correlated with the formation and presence of the FSW zone. From this study it was found that the tool angle for commercially pure aluminum having a thickness of 1.5 mm and 2.0 mm is 2.580. The tool angle is 1.910 for the sheets of AA 5052-H32 having a thickness of 1.6 mm and 2 mm. The joint efficiency of the friction stir welded AA 5052-H32 was 87.5 pct. when compared to the base material. The hardness was also observed to drop in the region of the weld. Key words: Friction stir welding, tool angle, aluminum alloy (AA5052-H32), Hardness, macrostructure, microstructure.

Analysis of Optimal Vertical in Angular U-Bending Process

This study aims to analyze the effects of angular U-bending process on the springback of metal sheets. Based on Updated Lagrangian Formulation (ULF), the 3D incremental elastic-plastic Finite Element Method was inferred to simulate the U-bending process of metal sheets. The die/blank holder profile with angles of α=-4°, α=-2°, α=0°, α=2°, α=4° and die/punch profile with radiuses of Rp=Rd=6.0mm were analyzed to determine the influence of tool angles on the springback. With different tool angles to proceed the U-bending process of metal sheets, it is found that the larger or smaller die angles, the more springback magnitude. When perpendicular U-sheets are required, θ1 of the U-sheet presents 90 degree on the tool angle α=-1.2° and θ2 shows 90 degrees on the tool angle α=-0.4°. The aim of this study is to investigate the effects of angle variables on the springback in the U-bending process and to obtain useful data from the industrial field.