Basic Research on Ultrasonic Extrusion for 45 Steel Shaft

2010 ◽  
Vol 455 ◽  
pp. 288-292 ◽  
Author(s):  
Jian Xin Zheng ◽  
Chuan Shao Liu ◽  
Yue Min Zhang
Keyword(s):  
Surface Roughness ◽  
Process Parameters ◽  
Basic Research ◽  
Micro Hardness ◽  
Experimental Conditions ◽  
Rotating Speed ◽  
Steel Shaft ◽  
Part Surface ◽  
Optimal Values ◽  
The Given

Research on ultrasonic extrusion under different process parameters for 45 steel shaft based on orthogonal test is carried out. The influences of various process parameters on shaft surface roughness and micro hardness are analyzed. The experimental results show that the influences of tool radius, pre-pressure, feed rate and rotating speed in the ultrasonic extrusion on surface roughness and micro hardness are different, but there are optimal values in the given experimental conditions. Compared with conventional extrusion, it can reduce the part surface roughness and improve surface micro hardness significantly in the process of ultrasonic extrusion.

Experimental investigations on surface integrity issues of Inconel-690 during wire-cut electrical discharge machining process

2016 ◽  
Vol 232 (4) ◽  
pp. 731-741 ◽  
Author(s):  
M Sreenivasa Rao ◽  
N Venkaiah
Keyword(s):  
Surface Roughness ◽  
Layer Thickness ◽  
Process Parameters ◽  
Electrical Discharge ◽  
Electrical Discharge Machining ◽  
Recast Layer ◽  
Machining Process ◽  
Micro Hardness ◽  
Recast Layer Thickness ◽  
Inconel 690

Nickel-based alloys are finding a wide range of applications due to their superior properties of maintaining hardness at elevated temperatures, low thermal conductivity and resistance to corrosion. These materials are used in aircraft, power-generation turbines, rocket engines, automobiles, nuclear power and chemical processing plants. Machining of such alloys is difficult using conventional processes. Wire-cut electrical discharge machining is one of the advanced machining processes, which can cut any electrically conductive material irrespective of its hardness. One of the major disadvantages of this process is formation of recast layer as it affects the properties of the machined surfaces. In this study, experimental investigation has been carried out to study the effect of wire-cut electrical discharge machining process parameters on micro-hardness, surface roughness and recast layer while machining Inconel-690 material. Interestingly, hardness of the machined surface was found to be lower than that of the bulk material. The micro-hardness and recast layer thickness are inversely related to the variation of process parameters. Recast layer thickness, surface roughness and hardness of the wire-cut electrical discharge machined surfaces of Inconel-690 are found to be in the range of 10–50 µm, 0.276–3.253 µm and 122–171 HV, respectively, for different conditions. The research findings and the data generated for the first time on hardness and recast layer thickness for Inconel-690 will be useful to the industry.

Effect of Ultrasonic Electroforming Process Parameters on Reflective Performance of Nickel Casting Layer

2014 ◽  
Vol 488-489 ◽  
pp. 222-227
Author(s):  
Fei Ye ◽  
Guang Yang ◽  
Jun Pi ◽  
Zi Qian Chen
Keyword(s):  
Surface Roughness ◽  
Process Parameters ◽  
Current Density ◽  
Laser Scanning ◽  
Laser Scanning Microscopy ◽  
Ultrasonic Power ◽  
Experimental Conditions ◽  
Average Current Density ◽  
Electroforming Process ◽  
Average Current

In order to improve the reflection coefficient of nickel electroforming layer with microprism structure effectively, controlling electroforming process strictly and adjusting different process parameters are needed for achieve the best electroforming effect. Nickel casting layer was prepared by ultrasonic direct current electroforming on the microprism nickel plate. Surface reflective coefficient of nickel casting layer was measured by retroreflectometer, and the morphology was observed by 3D laser scanning microscopy system. The effects of ultrasonic power, frequency and average current density on the surface reflective performance were studied, experimental results were verified by measuring microprism side surface roughness. The results show that reflective coefficient of nickel casting layer prepared by high frequency ultrasonic electroforming was greater than that by low frequency with other experimental conditions remaining unchanged. It was increased first and then decreased with ultrasonic power and average current density increasing gradually, and the surface roughness measurement also verified this conclusion.

scholarly journals Reduction of free fatty acids in waste oil for biodiesel production by glycerolysis: investigation and optimization of process parameters

2019 ◽  
Vol 8 (1) ◽  
pp. 15-23 ◽  
Author(s):  
Radoslav Mićić ◽  
Milan Tomić ◽  
Ferenc Martinović ◽  
Ferenc Kiss ◽  
Mirko Simikić ◽  
...  
Keyword(s):  
Process Parameters ◽  
Anomalous Behavior ◽  
Biodiesel Production ◽  
Water Removal ◽  
Optimal Conditions ◽  
Waste Oil ◽  
Experimental Conditions ◽  
Optimization Of Process Parameters ◽  
Novel Method ◽  
Optimal Values

Abstract Influence of the process parameters for the industrially relevant reaction of free fatty acid (FFA) with glycerol is investigated. Furthermore, several drying techniques are investigated and a novel method is suggested that can provide more realistic experimental conditions. Silica as an absorbent is found to be a more suitable method for water removal than distillation or carrier gas. Using response surface methodology, important parameters are identified and optimal conditions found. Empirical correlation is developed to account for the most important parameters. Both oil:glycerol ratio and temperature have optimal values for which the highest conversion can be achieved. Interestingly, the highest conversion can be obtained at 220°C; above this temperature the conversion decreases. It is found that the influence of oil:glycerol ratio also exhibits anomalous behavior, where conversion is constant and decreases above a certain value. At optimal conditions, the FFA is reduced to 1.6% from the initial 8.6%.

scholarly journals Investigation on Surface Roughness of Inconel 718 in Photochemical Machining

2017 ◽  
Vol 2017 ◽  
pp. 1-9 ◽  
Author(s):  
Nitin D. Misal ◽  
Mudigonda Sadaiah
Keyword(s):  
Surface Roughness ◽  
Process Parameters ◽  
Experimental Analysis ◽  
Inconel 718 ◽  
Surface Topology ◽  
Etching Time ◽  
Machining Parameters ◽  
Optimal Values ◽  
Dominant Parameter ◽  
Selection Of

The present work is focused on estimating the optimal machining parameters required for photochemical machining (PCM) of an Inconel 718 and effects of these parameters on surface topology. An experimental analysis was carried out to identify optimal values of parameters using ferric chloride (FeCl3) as an etchant. The parameters considered in this analysis are concentration of etchant, etching time, and etchant temperature. The experimental analysis shows that etching performance as well as surface topology improved by appropriate selection of etching process parameters. Temperature of the etchant found to be dominant parameter in the PCM of Inconel 718 for surface roughness. At optimal etching conditions, surface roughness was found to be 0.201 μm.

scholarly journals Process parameters optima in quick-point grinding ceramics based on the intelligent algorithm

2020 ◽  
Vol 12 (1) ◽  
pp. 168781401990010
Author(s):  
Yunguang Zhou ◽  
Lianjie Ma ◽  
Yanqing Tan ◽  
Tao Liu ◽  
Hongyang Li
Keyword(s):  
Surface Roughness ◽  
Process Parameters ◽  
Least Square ◽  
Incline Angle ◽  
Feed Speed ◽  
Micro Hardness ◽  
Improved Genetic Algorithm ◽  
Immune Algorithms ◽  
Experiment Verification ◽  
Propagation Network

This article studied the relationship between surface roughness and surface micro hardness of the hard-brittle materials and the process parameters in quick-point grinding, and then established the prediction model for the surface micro hardness and surface roughness by the back propagation network which was an improved genetic algorithm. Through the experiments of the quick-point grinding of ceramics, surface roughness and surface micro hardness were tested, and reliability of the model was validated thereby. Based on the least square fitting of the experiment value and prediction value, the one-dimensional analytic model for surface roughness and surface micro hardness had been, respectively, developed in terms of grinding speed, grinder work-table feed speed, grinding depth, incline angle, and deflection angle as process parameters. Both the correlation test and experiment verification indicated that the model exhibited a high level of accuracy. The multivariate model of surface roughness and surface micro hardness can be constructed by means of immune algorithms and orthogonal experiment data. With the optimum objective of the minimum surface roughness and maximum surface micro hardness, a set of optimized process parameters was obtained using immune algorithms, and experiment verification proved that the error value was less than 10%.

Effect of Burnishing Process on Surface Characteristics of Particulate Reinforced Iron-Base Composites

2010 ◽  
Vol 97-101 ◽  
pp. 2062-2066
Author(s):  
Li Fa Han ◽  
Sheng Guan Qu
Keyword(s):  
Surface Roughness ◽  
Process Parameters ◽  
Surface Characteristics ◽  
Micro Hardness ◽  
Ball Burnishing ◽  
Ceramic Ball ◽  
Iron Base ◽  
Roughness Surface ◽  
Burnishing Process ◽  
Particulate Reinforced

This paper presents an investigation on the surface characteristics of NbC particulate reinforced iron-base composites after burnished by a ceramic ball burnishing apparatus. The effect of relative parameters on surface roughness, surface micro-hardness and depth of hardening layer of composites is studied. The results show that after burnishing process the surface roughness of composites samples sharply decreases, and the surface micro-hardness increases relatively, and the depth of hardening layer accesses 0.120.16mm. Also, material’s burnishing mechanism is discussed, and the process parameters are optimized.

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