58 research outputs found

    Comparison of heat effects associated with metal cutting method on ST 37 alloy steel

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    In this study, by examining effects of the heat on the cut surface of material formed by the processes, such as Plasma, Laser, Wire Erosion applied on St 37 alloy steel material, it has been determined that minimum cutting damage occurs in wire erosion process

    Comparison of heat effects associated with metal cutting method on ST 37 alloy steel

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    In this study, by examining effects of the heat on the cut surface of material formed by the processes, such as Plasma, Laser, Wire Erosion applied on St 37 alloy steel material, it has been determined that minimum cutting damage occurs in wire erosion process

    Research on vibration damping on computer power supply box made of castermid material

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    In this study, our aim is to eliminate disadvantages that occur due to vibration. Therefore it has been made of the power supply box castermid material. In this study used both experimental and finite element methods analysis. For this purpose, the effects of the power supply box made directly of castermid material and the power supply box made of metal on damping of the vibration and which one of them is more effective were investigated, and the results were compared by Finite Element Method (FEM) results. As a result, it has been concluded that the castermid box created less noise than existing box did and it has damped the vibration more

    Comparison of advanced cutting techniques on hardox 500 steel material and the effect of structural properties of the material

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    Purpose of this study is to determine the most advantageous cutting method for a better competition chance. By presenting high hardness, high strength and superior toughness Hardox 500 steel. This sample was cut by plasma, laser, wire erosion and abrasive water jet (AWJ) methods from advanced cutting technologies. By taking micro structure photos of surface of the sample cut by different cutting methods, effects of different cutting methods on metallurgical structure of material were compared

    A Juridical Review Of The Shooting On The Spot Conducted By The Police Against The Perpetrator Criminal Act Of Theft

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    This research presents an overview of how juridical reviews of shooting in the place conducted by the police against perpetrators of criminal theft and the obstacles faced by the police in shooting in the place against criminals. This type of research uses normative research methods with the help of empirical data. In this case, the researcher combines elements of normative law which are then supported by the addition of data or empirical elements.The results of this study show that the actions taken by the police against the alleged perpetrators of motorcycle theft are not discretionary but pure criminal acts such as serious crimes of persecution that result in death or murder if the police investigators perform actions that are not following operational standards of procedure in the use of power with firearms or have exercised discretionary authority that goes beyond the limit of authority (abuse of power). The factors that are the constraints of the police in shooting in the place of the perpetrators of crime are the level of public crowds, the distance of the shooting with the perpetrator, weather conditions.Keywords: Shoot On The Spot, Police, Theft

    Application of Different Heat Treatment to Spheroidal Graphite Cast Iron and its Effect for Damping and Mode Shapes

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    In this study, damping and mode shapes were investigated after boriding and austempering the spheroidal graphite cast iron (SGCI). The samples were boronised and austempered at 900℃ for 2 hours by employing the pack cementation method. The samples were cooled and tempered in a salt bath at 250℃ and 375℃ for 1 hour. Once the boriding and austempering processes were completed, the samples were cooled at room temperature and washed with plenty of water. The modal frequencies, damping ratios and mode shapes of these samples exposed to different heat treatments were acquired by using the experimental modal analysis (MA) method. The same characteristic features were acquired with the finite element method (FEM), and the results were compared. It was found that after the heat treatment the sample austempered at 250oC had a harder surface and a higher frequency than other samples

    Effect on the vibration of the suspension system

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    In order to determine the damping effect of shock absorbs in vehicles, different vehicles acceleration values were measured while they were passing over speed bumps at different speeds. The vehicles’ vibration magnitudes caused by road roughness were analyzed. In this study the measurements were conducted with two different vehicles, multiple drivers and at different speeds. The vibration valves were determined with a HVM 100 device, in different field conditions and at 20 - 40 and 60 km/h by transferring the results to the system. According to the results of statistical analysis damping effect of the shock absorbers in the vehicles changed in different speed ranges and field conditions and it was seen that driver’s performance was significantly affected due to the vibration

    Damping properties of open pore aluminum foams produced by vacuum casting and NaCl dissolution process

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    In this study,damping ratios of 3 samples made of aluminum foam material, which have different-density pores, were calculated, the effects pore density on damping were examined. Experimental modal analysis method was used for examining of the effects of the pore density on damping. In experimental modal analysis method, frequency charts were obtained by driving to the sample with a hammer. Through these frequency charts, damping ratios of each 3 samples were calculated with ME’scope VES program. It was observed in calculated damping ratios that pore density has influences on damping; thus, damping accordingly increases as the number of pores increases. It is seen that critical damping constant decreases as the material structure changes in terms of volume and density

    Problems and solution offers related to the vocational and technical orientation in Turkey

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    When we look at the process during which the need for manpower in the sectors related to production, decreased and a system based on automation, was implemented along with the use of technology in the production; the importance of the need of qualified manpower, stands in front of us as a problem that must be solved primarily. The most important step for overcoming these problems, is to make an educational planning and to put it into practice, in which issues such as the interests and requests of the individual in Vocational orientation, environmental conditions, and the state’s economic condition. In today’s economic conditions and labor markets that have gradually become more competitive, individuals have to change their j o bs or even occupations at will or if required throughout their life, and to renew and improve their skills continuously. Therefore, the programs implemented in the institutions that provide Vocational and technical training, should bring extensive and transferable skills to the students as well as occupation-specific skills. A sense of education in the level and equipment that is able to meet the expectations of manufacturing sector, will be a very impo rtant step for the solution of the problems faced in Vocational and technical education orientation in our country. In this study, solution offers concerning the Vocational and Technical Education Orientation, have been suggested according to the present condition and the problems faced
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