Study on Ultrasonic Vibration Assisted Grinding in Theory

2006 ◽  
Vol 532-533 ◽  
pp. 773-776 ◽  
Author(s):  
Hong Li Zhang ◽  
Jian Hua Zhang ◽  
Meng You Huo
Keyword(s):  
Ultrasonic Vibration ◽  
Vibration Amplitude ◽  
Axial Direction ◽  
Grinding Force ◽  
Wheel Speed ◽  
Machining Process ◽  
Grinding Wheel ◽  
Trace Length ◽  
Cutting Model ◽  
Ultrasonic Vibration Assisted Grinding

In ultrasonic vibration assisted grinding (UAG) along the axial direction, the machining process of an abrasive grit is introduced in this paper. During the internal UAG, the critical speed is determined by the amplitude and frequency of ultrasonic vibration. During the surface UAG, the cutting model of an abrasive grit is established and the cutting trace length of an abrasive grit and the grinding force making chips deformation is analyzed in theory. The analysis results show that the cutting trace length is longer by introducing ultrasonic vibration along the axial direction; the grinding force is decreased, the higher vibration amplitude and frequency is helpful to the decrease of the grinding force and the higher grinding wheel speed weakens the contributiveness of ultrasonic vibration to the decrease of the grinding force.

scholarly journals On the Grinding Performance of Alumina Wheels in Ultrasonic Vibration-Assisted Grinding of Hardened GCr15 Steel

2021 ◽  
Author(s):  
Yutong Qiu ◽  
Biao Zhao ◽  
Yang Cao ◽  
Wenfeng Ding ◽  
Yucan Fu ◽  
...  
Keyword(s):  
Surface Quality ◽  
Ultrasonic Vibration ◽  
Grinding Force ◽  
Grinding Wheel ◽  
Wear Property ◽  
Wheel Wear ◽  
Machined Surface ◽  
Gcr15 Steel ◽  
Abrasive Grains ◽  
Ultrasonic Vibration Assisted Grinding

Abstract Composite manufacturing with multiple energy fields is an important source of processing technology innovation. In this work, comparative experiments on the conventional grinding (CG) and ultrasonic vibration-assisted grinding (UVAG) of hardened GCr15 steel were conducted with WA wheel. The grinding wheel wear patterns and chips were characterized. In addition, grinding force, force ratio, and ground surface quality were investigated to evaluate wheel performance. Results illustrate that the interaction between abrasive grains and workpiece in UVAG process has the characteristics of high frequency and discontinuity. The wear property of abrasive grains is changed and the grinding force is decreased because the generation of micro-fracture in abrasive grains improves the grinding wheel self-sharpening. Better surface quality is obtained, the surface roughness is reduced by up to 18.96%, and the number of defects on the machined surface is reduced through the superior reciprocating ironing of UVAG. Accordingly, WA wheel performance is improved by UVAG.

Experimental study of surface generating process in tangential ultrasonic vibration assisted grinding for titanium alloys

2020 ◽  
pp. 095440622096972
Author(s):  
Yan Wang ◽  
Shuai Geng ◽  
Zizheng Cheng ◽  
Yinghuai Dong ◽  
Shuo Yang ◽  
...  
Keyword(s):  
Titanium Alloys ◽  
Surface Quality ◽  
Ultrasonic Vibration ◽  
Removal Rate ◽  
Grinding Force ◽  
Fractional Factorial ◽  
Experimental Results ◽  
Machining Process ◽  
Series Of Experiments ◽  
Ultrasonic Vibration Assisted Grinding

This paper presents a fundamental investigation of the surface generating mechanisms involved in Tangential ultrasonic vibration assisted grinding (TUAG) for Titanium alloys processing. The relationship between ultrasonic vibration, grinding parameters and surface quality is illuminated; the grain paths chasing phenomena is pointed out to describe the surface forming, the surface topography and micro structure are studied and analyzed by a series of experiments. The influence of grain paths overlap and interfere on surface roughness and grinding force are studied respectively. A series of experiments designed by three-variable four-level fractional factorial is used to evaluate the machining performance. The experimental results are employed to clarify the surface features of Titanium alloys fabricated by ultrasonic vibration assisted grinding, in order to explain the interaction effects of the ultrasonic parameters on material removal rate, grinding force and surface quality. Experimental results show that the grinding force of TUAG is less than that of CG. At the spindle speed of 2000rpm, the grinding force in TUAG is 13N less than that in CG, which greatly optimizes the machining process and improves the surface machining quality.

Study on Grinding Force in Two-Dimensional Ultrasonic Grinding Nano-Ceramics

2010 ◽  
Vol 42 ◽  
pp. 204-208 ◽  
Author(s):  
Xiang Dong Li ◽  
Quan Cai Wang
Keyword(s):  
Mathematical Model ◽  
Ultrasonic Vibration ◽  
Contact Time ◽  
Reaction Force ◽  
Grinding Force ◽  
Two Dimensional ◽  
Indentation Fracture ◽  
Ultrasonic Grinding ◽  
The Impact ◽  
Ultrasonic Vibration Assisted Grinding

In this paper, the characteristic of grinding force in two-dimensional ultrasonic vibration assisted grinding nano-ceramic was studied by experiment based on indentation fracture mechanics, and mathematical model of grinding force was established. The study shows that grinding force mainly result from the impact of the grains on the workpiece in ultrasonic grinding, and the pulse power is much larger than normal grinding force. The ultrasonic vibration frequency is so high and the contact time of grains with the workpiece is so short that the pulse force will be balanced by reaction force from workpiece. In grinding workpiece was loaded by the periodical stress field, which accelerates the fatigue fracture.

Influence of Cup Wheel Grinding and Etching Pretreatment on Residual Stress and Surface Topography for Coated Cemented Carbide Tools

2012 ◽  
Vol 497 ◽  
pp. 10-14
Author(s):  
Tie Jun Song ◽  
Zhi Xiong Zhou ◽  
Wei Li ◽  
Ai Min Tang
Keyword(s):  
Residual Stress ◽  
Surface Topography ◽  
Cutting Tools ◽  
Wheel Speed ◽  
Cemented Carbide ◽  
Machining Process ◽  
Grinding Wheel ◽  
Near Surface ◽  
Cup Wheel ◽  
Coated Cemented Carbide

Cup wheel grinding and etching pretreatment are widely used in complex coated cemented carbide cutting tools machining process. The two processes determine different surface properties due to various mechanical and thermal loads in grinding and complex chemical reaction in etching pretreatment. In this paper, the effect of the grinding wheel speed, the grinding feed rate and the etching time with the Murakami and acid solution on the residual stress and surface topography of coated cemented carbide cutting tools are investigated. After each process, the samples are characterized by scanning electron microscopy and X-ray diffraction. It is found that the grinding wheel speed has a significant influence on residual stress measured in the WC phase. Etching by Murakami generated smooth surface, which partly removed the near-surface residual stress quickly but cannot eliminate.

scholarly journals Effect of laser-assisted ultrasonic vibration dressing parameters of a cubic boron nitride grinding wheel on grinding force, surface quality, and particle morphology

2021 ◽  
Vol 60 (1) ◽  
pp. 691-701
Author(s):  
Zhibo Yang ◽  
Wang Sun ◽  
Dongyu He ◽  
Daocheng Han ◽  
Wei Wang ◽  
...  
Keyword(s):  
Boron Nitride ◽  
Surface Quality ◽  
Ultrasonic Vibration ◽  
Process Parameters ◽  
Cubic Boron Nitride ◽  
Grinding Force ◽  
Grinding Wheel ◽  
Abrasive Particles ◽  
Dressing Force ◽  
Cbn Grinding Wheel

Abstract In this article, the laser-assisted ultrasonic vibration dressing technique was applied to the cubic boron nitride (CBN) grinding wheel to study the effect of various process parameters (namely, laser power, dressing depth, feed rate, and grinding wheel speed) on the grinding force, surface quality, and morphological evolution of CBN abrasive particles. The results showed that abrasive particles’ morphology mainly undergoes micro-crushing, local crushing, large-area crushing, macro-crushing, and other morphological changes. The dressing force can be effectively reduced by controlling the dressing process parameters. Besides, grinding tests are performed on the grinding wheel after dressing to reveal specimens’ surface quality. Excellent grinding characteristics and grinding quality of the grinding wheel were obtained by the proposed technique with the optimized process parameters.

The Process Experimental Study on High Efficiency Deep Grinding for 9SiCr Alloy Steel with a CBN Wheel

2013 ◽  
Vol 457-458 ◽  
pp. 172-176
Author(s):  
Zong Fu Guo ◽  
Xiao Min Sheng ◽  
Gui Zhi Xie ◽  
De Zhen Yin ◽  
Wen Xin Li
Keyword(s):  
Surface Quality ◽  
Alloy Steel ◽  
High Efficiency ◽  
Removal Rate ◽  
Grinding Force ◽  
Wheel Speed ◽  
Depth Of Cut ◽  
Grinding Wheel ◽  
Good Surface ◽  
High Removal Rate

This paper via investigate the process of 9SiCr alloy steel in high efficiency deep grinding to find the rule between grinding wheel speed vs depth of cut ap and speed of table vw with the grinding force and the surface quality. Intend to develop a suitable method of the grinding process of 9SiCr alloy steel in high efficiency deep grinding, to obtain high removal rate and good surface quality.

Experimental Study on Ultrasonic Vibration Dressing Wheel

2010 ◽  
Vol 135 ◽  
pp. 260-264
Author(s):  
Dao Hui Xiang ◽  
Xin Tao Zhi ◽  
Guang Xi Yue ◽  
Bo Zhao ◽  
Q.T. Fan
Keyword(s):  
Surface Quality ◽  
Ultrasonic Vibration ◽  
Ground Surface ◽  
Surface Characteristics ◽  
Axial Direction ◽  
Grinding Wheel ◽  
Workpiece Surface ◽  
Surface Burn ◽  
Grinding Conditions ◽  
Strict Requirement

Excellent wheel dressing technology can ensure the ground surface quality effectively. Because precision machining has a strict requirement on the wheel dressing, the wheel dressing with ultrasonic vibration was adopted, and the device of ultrasonic vibration dressing was also designed in this paper. On the base of analysis mechanism of ultrasonic vibration dressing wheel, the grinding experiment was carried out in different dressing conditions. The surface characteristics of ultrasonic dressing wheel and the influence of different dressing parameters on the workpiece surface quality were studied. Furthermore, the optimal dressing parameters have been obtained. The experiment results indicate that the micro cutting edge of grinding wheel distribute sparsely in circumferential directional but densely in axial direction in the condition of ultrasonic dressing, and it is particular characteristic of ultrasonic dressing. When the dressing and grinding conditions are suitable, the workpiece surface roughness can be reduced, but the conditions are not arbitrary. At the same time, the workpiece surface burn can be effectively reduced, even if the larger grinding depth is used during the grinding process.

scholarly journals Experimental Study of the Ultrasonic Vibration-Assisted Abrasive Waterjet Micromachining the Quartz Glass

2018 ◽  
Vol 2018 ◽  
pp. 1-9 ◽  
Author(s):  
Rongguo Hou ◽  
Tao Wang ◽  
Zhe Lv ◽  
Yuanyong Liu
Keyword(s):  
Ultrasonic Vibration ◽  
Vibration Amplitude ◽  
Material Removal ◽  
Experimental Results ◽  
Machining Process ◽  
Abrasive Waterjet ◽  
Influence Of Process Parameters ◽  
Erosion Depth ◽  
System Pressure

The ultrasonic vibration is used to enhance the capability of the abrasive water micromachining glass. And, the ultrasonic vibration is activated on the abrasive waterjet nozzle. The quality of the flow is improved, and the velocity of the abrasive is increased because of the addition of the ultrasonic energy. The relevant experimental results indicate that the erosion depth and the material volume removal of the glass are obviously increased when ultrasonic vibration is working. As for the influence of process parameters on the material removal of the glass such as vibration amplitude, system pressure, distance of the standoff, and abrasive size, the experimental results indicate that the system pressure and vibration contribute greatly to the glass material removal. Also, the erosion depth and the volume of material removal are increased with the increase in the vibration amplitude and system pressure. There are some uplifts found at the edge of erosion pit. Then, it can be inferred that the plastic method is an important material removal method during the machining process of ultrasonic vibration-assisted abrasive waterjet.

Tribological properties of surface topography in ultrasonic vibration-assisted grinding of zirconia ceramics

2017 ◽  
Vol 232 (22) ◽  
pp. 4203-4215
Author(s):  
Zhihua Li ◽  
Kan Zheng ◽  
Wenhe Liao ◽  
Xingzhi Xiao
Keyword(s):  
Friction Coefficient ◽  
Surface Topography ◽  
Ultrasonic Vibration ◽  
Tribological Properties ◽  
Vibration Amplitude ◽  
Spindle Speed ◽  
Zirconia Ceramics ◽  
Significant Difference ◽  
Vibration Parameters ◽  
Ultrasonic Vibration Assisted Grinding

In order to clarify the friction phenomenon of zirconia ceramics in the dental prosthodontics, tribological properties of surface topography in ultrasonic vibration-assisted grinding (UVAG) are studied in this work. The mechanism of material removal is researched to introduce the discontinuous grooves in UVAG theoretically. The UVAG experiments are conducted on zirconia ceramics. Through investigating and comparing experimental results, it is found that UVAG surface has better tribological properties compared with diamond grinding surface. 3D surface roughnesses of UVAG surface are improved when suitable spindle speed, large feed, small cutting depth, and large vibration amplitude are adopted. Surface topography in UVAG changes from thorn scaly to discontinuous shallow furrow when feed increases and spindle speed decreases. The discontinuous grooves are most apparent when vibration amplitude is maximum. Furthermore, the friction coefficient is experimentally studied. The results indicate that there is no significant difference among all the friction coefficients in UVAG. Proper cutting and vibration parameters can improve the average friction coefficient.

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