Experimental Research on the Surface Roughness Characteristics in Ultrasonic Vibration Lapped Surface of Titanium Alloy

2010 ◽  
Vol 43 ◽  
pp. 420-423
Author(s):  
Lin Zhu ◽  
Ji Yun Li
Keyword(s):  
Surface Roughness ◽  
Grain Size ◽  
Titanium Alloy ◽  
Titanium Alloys ◽  
Ultrasonic Vibration ◽  
Experimental Research ◽  
Reference Value ◽  
Single Factor ◽  
Processing Parameter ◽  
Research Results

Based on the machining principle of ultrasonic vibration lapping, the surface roughness characteristics of plastic difficult-to-machine titanium alloys are studied through experiments using self-developed ultrasonic vibration lapping device. And the effects of workpiece speed, ultrasonic amplitude and grain size on surface roughness were researched by using single-factor testing way. The research results show that surface roughness is decreased to a certain extent for the assistance of ultrasonic vibration. The corresponding results provide certain reference value for the optimization of processing parameter in ultrasonic vibration lapping.

Experimental Research on Ultrasonic Vibration Deep Hole Honing of Titanium Alloy

2011 ◽  
Vol 314-316 ◽  
pp. 1107-1111
Author(s):  
Hong Bing Zhao ◽  
Ying Fei Nan
Keyword(s):  
Surface Roughness ◽  
Titanium Alloy ◽  
Ultrasonic Vibration ◽  
Experimental Research ◽  
High Surface ◽  
The Self ◽  
Deep Hole ◽  
High Surface Roughness ◽  
Low Efficiency ◽  
Better Than

Deep hole honing is the primary way of finishing, the main problems existing now are the low efficiency, high surface roughness, especially in the processing of difficult to cut materials. In this study, the test is on the titanium alloy and uses the self-developed ultrasonic vibration honing equipment. The results show that in the same conditions, the ultrasonic vibration in deep-hole honing can improve the efficiency about 1 times, and meanwhile the surface roughness can reach below 0.8μm, the oilstone is uneasy to block, and the technical effects are better than traditional honing process.

scholarly journals Cutting Parameter Optimization in Finishing Milling of Ti-6Al-4V Titanium Alloy under MQL Condition using TOPSIS and ANOVA Analysis

2021 ◽  
Vol 11 (1) ◽  
pp. 6775-6780
Author(s):  
V. C. Nguyen ◽  
T. D. Nguyen ◽  
D. H. Tien
Keyword(s):  
Surface Roughness ◽  
Titanium Alloy ◽  
Titanium Alloys ◽  
Contact Area ◽  
Removal Rate ◽  
Multiple Criteria Decision Making ◽  
Machining Process ◽  
Anova Analysis ◽  
Wide Range ◽  
Cutting Parameter Optimization

Titanium and its alloys give immense specific strength, imparting properties such as corrosion and fracture resistance, making them the right candidate for medical and aerospace applications. There is a wide range of engineering applications that use titanium alloys in a variety of forms. The cost of these alloys is slightly higher in comparison to other variants due to the problematic extraction of the molten process. To reduce costs, titanium alloy products could be made by casting, isothermal forging, radial swaging, or powder metallurgy, although these techniques require some kind of finishing machining process. Titanium and its alloys are difficult to machine due to skinny chips leading to a small cutting tool-workpiece contact area. The thermal conductivity of titanium alloys is too low and the stress produced is too large due to the small contact area, which results in very high cutting temperatures. This paper deals with the experimental study of the influence of the Minimum Quantity Lubricant (MQL) environment in the milling of Ti-6Al-4V alloy considering the optimization of surface roughness and production rate. Taguchi-based TOPSIS and ANOVA were used to analyze the results. The experimental results show that MQL with vegetable oil is successfully applied in the milling of Ti-6Al-4V. The research confirms the suitability of TOPSIS in solving the Multiple Criteria Decision Making (MCDM) issue, by choosing the best alternative at Vc=120m/min, fz=0.065mm/tooth, and ap=0.2mm, where the surface roughness and material removal rate are 0.41µm and 44.1492cm3/min respectively. Besides, ANOVA can be used to predict the best parameters set in the milling process based on the regression model. The parameters predicted by ANOVA analysis do not coincide with any implemented parameters

Machinability of Heat-Resistant Titanium Alloys during Turning

2021 ◽  
Vol 1022 ◽  
pp. 62-70
Author(s):  
Tatyana Larionova ◽  
Sergei A. Lyubomudrov ◽  
Evgeniy Larionov
Keyword(s):  
Mathematical Model ◽  
Titanium Alloy ◽  
Titanium Alloys ◽  
Experimental Research ◽  
Cutting Tool ◽  
Technological System ◽  
Elastic Deformations ◽  
Heat Resistant ◽  
Processing Modes ◽  
Mechanical And Service Properties

The article discusses the properties and features of heat-resistant titanium alloys. The microstructure of a new titanium alloy VT41, its mechanical and service properties after various processing modes are presented. The main problems in the machining of difficult-to-machine titanium alloys are considered. The developed mathematical model of the formation of errors in turning titanium alloys, taking into account thermal deformations and dimensional wear of the cutting tool, elastic deformations of the technological system, is described. The paper presents the results of experimental research on turning of heat-resistant titanium alloy VT41 on a multi-parameter stand.

Mechanism of chip formation in ultrasonic vibration drilling and experimental research

2019 ◽  
Vol 233 (15) ◽  
pp. 5214-5226 ◽  
Author(s):  
Shuo Chen ◽  
Ping Zou ◽  
Hao Wu ◽  
Di Kang ◽  
Wenjie Wang
Keyword(s):  
Surface Roughness ◽  
Tool Wear ◽  
Ultrasonic Vibration ◽  
Experimental Research ◽  
Drilling Process ◽  
Superior Surface ◽  
Series Of Experiments ◽  
Vibration Drilling ◽  
Conventional Drilling ◽  
Selection Of

When difficult-to-machine materials are drilled, chips are produced, and these chips are difficult to control during the drilling process. Due to the limitations of conventional drilling, materials are drilled by ultrasonic-vibration-assisted technology. In this paper, the kinematics of ultrasonic-vibration-assisted drilling are first analyzed and the relevant equations are established. The characteristic thicknesses of chips are then studied, and the drilling paths for different phases and thicknesses of the chips are analyzed. The condition of complete geometric chipbreaking in the ultrasonic-vibration-assisted drilling process is examined, and a regional map of chipbreaking is presented, which in theory allows chips to be controlled. Chips produced in ultrasonic-vibration-assisted drilling with different parameters are compared in a series of experiments. The chipbreaking condition is studied in more detail, and the chips produced by drilling difficult-to-machine materials are effectively controlled. Furthermore, the results of this study show that a reasonable selection of parametric variables in ultrasonic-vibration-assisted drilling results in thin and smooth chips, less tool wear, and superior surface roughness.

Analysis and Optimization of Surface Roughness in Rotary Ultrasonic Burnishing of Titanium Alloy Ti-6Al-4V

2016 ◽  
Vol 1136 ◽  
pp. 406-411
Author(s):  
Jian Zhao ◽  
Zhan Qiang Liu
Keyword(s):  
Surface Roughness ◽  
Titanium Alloy ◽  
Processing Parameters ◽  
Spindle Speed ◽  
Optimal Combination ◽  
Ultrasonic Frequency ◽  
Processing Parameter ◽  
Burnishing Process ◽  
Level Of Processing ◽  
Predominant Effect

The purpose of the paper is to investigate the influence of the processing parameters on the surface roughness in rotary ultrasonic burnishing of titanium alloy Ti-6Al-4V plane. A Taguchi orthogonal array for three levels and four factors, which include burnishing depth, feed fate, spindle speed and ultrasonic frequency, are designed. The optimal combination of ultrasonic burnishing process parameters is obtained. Analysis of variance (ANOVA) is applied to determine the most significant processing parameter and to obtain the optimal combination level of processing parameters for the lowest surface roughness. The results show that burnishing depth has the most predominant effect on surface roughness, and spindle speed is the secondary one. Feed rate and ultrasonic frequency are then followed and have no distinct effect on surface roughness in rotary burnishing of Ti-6Al-4V.

Rotary Ultrasonic Machining of Titanium Alloy: A Feasibility Study

2005 ◽  
Author(s):  
N. J. Churi ◽  
Z. C. Li ◽  
Z. J. Pei ◽  
C. Treadwell
Keyword(s):  
Experimental Study ◽  
Surface Roughness ◽  
Titanium Alloy ◽  
Tool Wear ◽  
Titanium Alloys ◽  
Cutting Force ◽  
Aerospace Industry ◽  
Ultrasonic Machining ◽  
Rotary Ultrasonic Machining ◽  
Conventional Machining

Due to their unique properties, titanium alloys are attractive for some unique applications especially in the aerospace industry. However, it is very difficult to machine these materials cost-effectively. Although many conventional and non-conventional machining methods have been reported for machining them, no reports can be found in the literature on rotary ultrasonic machining of titanium alloys. This paper presents an experimental study on rotary ultrasonic machining of a titanium alloy. The tool wear, cutting force, and surface roughness when rotary ultrasonic machining of the titanium alloy have been investigated using different tool designs and machining conditions. The results are compared with those when machining the same material with diamond grinding.

scholarly journals Experimental Investigation on Machinability of Titanium Alloy by Laser-Assisted End Milling

Metals ◽  
2021 ◽  
Vol 11 (10) ◽  
pp. 1552
Author(s):  
Dong-Hyeon Kim ◽  
Choon-Man Lee
Keyword(s):  
Surface Roughness ◽  
Experimental Investigation ◽  
Titanium Alloy ◽  
Titanium Alloys ◽  
Cutting Force ◽  
Cutting Tool ◽  
End Milling ◽  
Chemical Reactivity ◽  
Depth Of Cut ◽  
Laser Assisted Machining

The Machining of titanium alloys is challenging because of their high strength, low thermal conductivity, high chemical reactivity, and high stresses at the cutting tool edges. Laser-assisted machining is an effective way to improve the machinability of titanium alloys. This paper presents an experimental investigation of the machinability of cutting force and surface roughness in laser-assisted end milling of titanium alloy Ti-6Al-4V. The absorptivity of Ti-6Al-4V was determined by conducting preheating experiments using a high-power diode laser with a wavelength of 940–980 nm. A thermal analysis was performed using the finite element method to predict temperature distribution. The depth of cut was determined where tensile strength decreased sharply, and the predicted surface temperature is presented in the analysis results. The experiments were performed with conventional machining and laser-assisted machining. Surface roughness, tool wear, and cutting force were evaluated. In contrast to the results of conventional end milling, laser-assisted end milling improved surface roughness. Moreover, laser-assisted end milling proved more effective than conventional end milling in terms of cutting tool damage. Our results proved that heat assistance significantly influenced the magnitude of the cutting forces—while the actual reduction in forces varied slightly depending on the force component, cutting tool, and cutting conditions, force components showed a reduction of roughly 13–46%.

Study of Ultrasonically Assisted Internal Grinding of Small Holes: Effect of Grain Size of cBN Grinding Wheel

2009 ◽  
Vol 83-86 ◽  
pp. 1002-1008 ◽  
Author(s):  
Mitsuyoshi Nomura ◽  
Yong Bo Wu ◽  
Tsunemoto Kuriyagawa ◽  
Takahiro Kawashima ◽  
Takayuki Shibata
Keyword(s):  
Surface Roughness ◽  
Grain Size ◽  
Ultrasonic Vibration ◽  
Grinding Wheel ◽  
Fuel Injector ◽  
Grinding Forces ◽  
Automotive Engine ◽  
Internal Grinding ◽  
Experimental Apparatus ◽  
Cbn Grinding Wheel

This study aims to develop an ultrasonically assisted grinding technology for precision internal grinding of a small hole measuring several millimeters in diameter, such as those formed in a fuel injector for an automotive engine. In a previous work, an experimental apparatus mainly composed of an ultrasonic vibration spindle was designed and constructed, and grinding experiments were carried out. The previous investigation found that applying ultrasonic vibration to the wheel decreased the normal and tangential grinding forces, respectively, and improved the surface roughness in surface grinding. The purpose of this paper is to examine the effect of ultrasonic vibration on grinding force and surface roughness in internal grinding when the grain sizes of small cBN grinding wheel are changed. The experimental results indicate that applying ultrasonic vibration to the wheel decreases the normal and tangential grinding forces by more than 83 % and 80 %, respectively, and improves the surface roughness by as much as 62 % while the wheel grain size is changed. In addition, over the range of grinding conditions employed in this paper, the grain size as small as 3 µm can be used in ultrasonically assisted internal grinding.

Effects of Grain Size and Concentration of Grinding Wheel in Ultrasonically Assisted Grinding

2008 ◽  
Vol 389-390 ◽  
pp. 283-288 ◽  
Author(s):  
Mitsuyoshi Nomura ◽  
Yong Bo Wu ◽  
Tsunemoto Kuriyagawa ◽  
Takahiro Kawashima ◽  
Takayuki Shibata
Keyword(s):  
Surface Roughness ◽  
Grain Size ◽  
Ultrasonic Vibration ◽  
Grinding Wheel ◽  
Fuel Injector ◽  
Grinding Forces ◽  
Automotive Engine ◽  
Experimental Apparatus ◽  
Grinding Conditions ◽  
Cbn Grinding Wheel

This study aims to develop an ultrasonically assisted grinding technology for precision internal grinding of a small hole measuring several millimeters in diameter, such as those formed in a fuel injector for an automotive engine. In a previous work, an experimental apparatus mainly composed of an ultrasonic vibration spindle was designed and constructed, and grinding experiments were carried out. The purpose of this paper is to examine the effect of ultrasonic vibration on grinding force and surface roughness when the grain size and concentration of small cBN grinding wheel are changed. The experimental results indicate that applying ultrasonic vibration to the wheel decreases the normal and tangential grinding forces by more than 50% and 78%, respectively, and improves the surface roughness by as much as 10% when the wheel grain size and concentration are changed. In addition, over the range of grinding conditions employed in this paper, the grain size as small as 5μm can be used in ultrasonically assisted grinding.

Surface Pressure Treatment of Titanium Alloy Bars by Transverse Rolling

2019 ◽  
Vol 946 ◽  
pp. 744-749 ◽  
Author(s):  
Aleksey Antimonov ◽  
Nadezhda Pushkareva
Keyword(s):  
Surface Roughness ◽  
Corrosion Resistance ◽  
Titanium Alloy ◽  
Titanium Alloys ◽  
Surface Pressure ◽  
Ultrasonic Testing ◽  
Cutting Tool ◽  
Experimental Studies ◽  
Pressure Treatment ◽  
Metal Microstructure

The results of the process experimental studies of titanium alloys transverse rolling bars are presented. The efficiency of using such a process for reducing the surface roughness is shown. The samples were tested after rolling on corrosion-resistance resistance, ultrasonic testing, and also the study of the metal microstructure was made. For the bars transverse rolling in industrial conditions, a tooling was developed and created, intended for installation on operating centerless lathes instead of tooling with a cutting tool. Production tests of new equipment has shown its good performance.

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