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%.

Experimental Investigation on Surface/Subsurface Damage in Rotary Ultrasonic Machining of Glass BK7

2013 ◽  
Vol 325-326 ◽  
pp. 1357-1361 ◽  
Author(s):  
Yan Hua Huang ◽  
Dong Xi Lv ◽  
Yong Jian Tang ◽  
Hong Xiang Wang ◽  
Hai Jun Zhang
Keyword(s):  
Surface Roughness ◽  
Ultrasonic Vibration ◽  
Process Parameters ◽  
Subsurface Damage ◽  
Spindle Speed ◽  
Feed Speed ◽  
Ultrasonic Machining ◽  
Rotary Ultrasonic Machining ◽  
Cutting Depth ◽  
Influence Of Process Parameters

Experiments were carried out to study the effect of ultrasonic vibration on the surface roughness and subsurface damage (SSD) in rotary ultrasonic machining (RUM) of glass BK7. As a comparison, some conventional grinding (CG) experiments were also performed under the same process parameters with there of the RUM ones. The surface roughness of the RUM/CG samples was measured with a surface profilometer. The SSD of these specimens was assessed and characterized by a measuring microscope with the help of the taper polishing method. Also, the influence of process parameters (cutting depth, feed speed, and spindle speed) on the surface/subsurface quality was discussed. As a result, both the surface roughness and the SSD depth of the RUM/CG specimens were reduced with the increased spindle speed, while increased with the increasing of feed speed and cutting depth of the diamond tool. Compared with the CG process, the introduction of ultrasonic vibration resulted in the higher surface roughness and SSD depth, due to the fact that the max cutting depth of the abrasive in the RUM process increased by an amplitude compared with that in the CG process.

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.

Experimental Study on Optimizing Process Parameters in Two-Dimensional Ultrasonic Rolled Extrusion

2010 ◽  
Vol 37-38 ◽  
pp. 435-438 ◽  
Author(s):  
Jian Xin Zheng ◽  
Jian Jun Jiang ◽  
Chuan Shao Liu
Keyword(s):  
Surface Roughness ◽  
Process Parameters ◽  
Spindle Speed ◽  
Experimental Results ◽  
Feed Speed ◽  
Two Dimensional ◽  
Influence Curves ◽  
Convex Curves ◽  
Orthogonal Experiments ◽  
A New Technique

Two-dimensional ultrasonic vibration was introduced into common rolled extrusion, effect of the process parameters including tool head radius, feed speed, preload and spindle speed on the 45 steel shaft surface roughness were analyzed through orthogonal experiments. Experimental results show that lower value of surface roughness may be obtained in the process of two-dimensional ultrasonic rolled extrusion than that of common rolled extrusion, and the influence order of process parameters on surface roughness is feed speed, spindle speed, preload and tool head radius; the influence curves of tool head radius and spindle speed on surface roughness are concave curves, and influence curves of feed speed and preload on surface roughness are convex curves, or optimizing process parameters exist. The empirical formula for surface roughness is given using multiple regression analysis based on the experimental results. This study will provide a new technique for finishing precision parts.

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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