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.

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.

Grinding Force of Ultrasonic Vibration Assisted Grinding Combined with EDM

2012 ◽  
Vol 500 ◽  
pp. 287-294 ◽  
Author(s):  
Peng Yan ◽  
Jian Hua Zhang ◽  
Guo Sheng Su
Keyword(s):  
Ultrasonic Vibration ◽  
Pulse Discharge ◽  
Processing Parameters ◽  
Grinding Force ◽  
Force Model ◽  
Grinding Process ◽  
Machining Parameters ◽  
Processing Efficiency ◽  
Machined Surface ◽  
Ultrasonic Vibration Assisted Grinding

In the ultrasonic vibration assisted grinding and EDM, grinding and pulse discharge machining are favorable conditions for each other, can significantly improve the processing efficiency by adjusting the processing parameters, and get high-quality machined surface. The grinding force is an important parameter in characterizing the grinding process, which is the g the main object of study in grinding process. The interaction of ultrasonic vibration, grinding and EDM is investigated. From the view of material removal volume, the volume of removal by EMD is calculated. Then the volume by grinding is gotten. The grinding force model of combined machining is established. The influence machining parameters on grinding force is studied, which is helpful for the detection and control of grinding force.

Investigation on Machining Characteristics for Tangential Ultrasonic Vibration Assisted Grinding

2010 ◽  
Vol 34-35 ◽  
pp. 282-286
Author(s):  
Wei Feng Lang ◽  
Hong Li Zhang
Keyword(s):  
Surface Quality ◽  
Ultrasonic Vibration ◽  
Critical Speed ◽  
Grinding Force ◽  
Machining Parameters ◽  
Theory Analysis ◽  
Kinematic Characteristics ◽  
Ultrasonic Vibration Assisted Grinding ◽  
Machining Characteristics ◽  
Good Agreement

A critical speed formula was given based on the analysis of kinematic characteristics during tangential ultrasonic vibration assisted grinding (TUAG) process. By the formula, the machining parameters can be correctly set to insure the separate characteristics of TUAG process. The grinding force can be decreased and the machining surface quality can be improved during TUAG process with separability. Grinding experiments were conducted, and the experiment results are in good agreement with theory analysis results.

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.

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.

scholarly journals Wheel Wear Related Instability in Grinding of Quartz Glass

2021 ◽  
Author(s):  
Yonghao Wang ◽  
Ping Zhou ◽  
Yuhang Pan ◽  
Ying Yan ◽  
Dongming Guo
Keyword(s):  
Surface Roughness ◽  
Surface Quality ◽  
Chip Thickness ◽  
Ground Surface ◽  
Grinding Force ◽  
Grinding Wheel ◽  
Wheel Wear ◽  
Undeformed Chip Thickness ◽  
Grinding Wheel Wear ◽  
Ground Surface Roughness

Abstract Grinding is a popular method for producing high-quality parts made of hard and brittle materials. A lot of researchers have focused on the impact of grinding parameters on surface quality. However, only a few studies discussed the surface quality instability caused by the grinding wheel wear during a long grinding process. In this paper, through wheel state monitoring and surface quality testing of ground samples, it is found that the relationship between ground surface roughness and theoretical undeformed chip thickness is significantly affected by the grinding wheel wear state, rather than maintain steady as described in most available models. By introducing the normal grinding force, a linearly relationship was found among normal grinding force, undeformed chip thickness and ground surface roughness. Besides, sensitivity analysis was conducted to guide the parameter adjustment to maintain the stability of ground surface roughness and grinding state. The mechanism of the effect of wheel wear on normal grinding force was also studied in detail. This study will help to further understand the mechanism of the influence of wheel wear on the grinding stability.

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.

Research on Grinding Force of Zirconia Internal Grinding with Resin Bond Diamond Wheel

2016 ◽  
Vol 1136 ◽  
pp. 30-35
Author(s):  
He Wang ◽  
Ke Zhang ◽  
Yu Hou Wu ◽  
Hong Song
Keyword(s):  
Grain Size ◽  
Surface Quality ◽  
Diamond Wheel ◽  
Grinding Force ◽  
Wheel Speed ◽  
Zirconia Ceramic ◽  
Machined Surface ◽  
Research Results ◽  
Internal Grinding ◽  
Machined Surface Quality

The zirconia parts are limited by machined surface quality. The grinding force is one of the most important parameters of grinding and has effects on surface quality. The MK2710 grinder and resin bond diamond wheels were used in zirconia grinding. The grinding force was obtained by Kistler dynamometer. The paper focused on wheel speed and grain size on grinding force, and examined the surface by SEM. The research results indicated that decreasing the grain size, the grinding force increased and the surface quality improved, and increasing wheel speed could decrease grinding force to improve grinding surface quality. The results can improve zirconia ceramic parts surface quality and promote application.

scholarly journals Grinding of AISI 4340 steel with interrupted cutting by aluminum oxide grinding wheel

2015 ◽  
Vol 68 (2) ◽  
pp. 229-238
Author(s):  
Hamilton Jose de Mello ◽  
Diego Rafael de Mello ◽  
Eduardo Carlos Bianchi ◽  
Paulo Roberto de Aguiar ◽  
Doriana M. D'Addona
Keyword(s):  
Aluminum Oxide ◽  
Rotation Speed ◽  
Grinding Wheel ◽  
Grinding Process ◽  
Wheel Wear ◽  
Machined Surface ◽  
Aisi 4340 Steel ◽  
4340 Steel ◽  
Grinding Machine ◽  
Aisi 4340

AbstractThere has been a great advance in the grinding process by the development of dressing, lubri-refrigeration and other methods. Nevertheless, all of these advances were gained only for continuous cutting; in other words, the ground workpiece profile remains unchanged. Hence, it becomes necessary to study grinding process using intermittent cutting (grooved workpiece – discontinuous cutting), as little or no knowledge and studies have been developed for this purpose, since there is nothing found in formal literature, except for grooved grinding wheels. During the grinding process, heat generated in the cutting zone is extremely high. Therefore, plenty of cutting fluids are essential to cool not only the workpiece but also the grinding wheel, improving the grinding process. In this paper, grinding trials were performed using a conventional aluminum oxide grinding wheel, testing samples made of AISI 4340 steel quenched and tempered with 2, 6, and 12 grooves. The cylindrical plunge grinding was performed by rotating the workpiece on the grinding wheel. This plunge movement was made at three different speeds. From the obtained results, it can be observed that roughness tended to increase for testing sample with the same number of grooves, as rotation speed increased. Roundness error also tended to increase as the speed rotation process got higher for testing the sample with the same number of grooves. Grinding wheel wear enhanced as rotation speed and number of grooves increased. Power consumed by the grinding machine was inversely proportional to the number of grooves. Subsuperficial microhardness had no significant change. Micrographs reveal an optimal machining operation as there was no significant damage on the machined surface.

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