Studies on Electroplated Grinding Wheel with Diamond Abrasive Particles

A new plate polishing technique with an instantaneous tiny-grinding wheel cluster based on the magnetorheological (MR) effect is presented in this paper, and some experiments were conducted to prove its effectiveness and applicability. Under certain experimental condition, the material removal rate was improved by a factor of 20.84% as compared with the conventional polishing methods with dissociative abrasive particles, while the surface roughness of the workpiece was not obviously increased. Furthermore, the composite of the MR fluid was optimized to obtain the best polishing performance. On the basis of the experimental results, the material removal model of the new plate polishing technique was presented.

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New Active Online Balancing Method for Grinding Wheel Using Liquid Injection and Free Dripping

Journal of Vibration and Acoustics ◽

10.1115/1.4037955 ◽

2017 ◽

Vol 140 (3) ◽

Cited By ~ 7

Author(s):

Xining Zhang ◽

Xu Liu ◽

Huan Zhao

Keyword(s):

Grinding Wheel ◽

Time Varying ◽

Residual Liquid ◽

Grinding Wheels ◽

Abrasive Particles ◽

Balance Condition ◽

Liquid Injection ◽

Grinding Machines ◽

The Relationship

Grinding is a vital method in machining techniques and an effective way to process materials such as hardened steels and silicon wafers. However, as the running time increases, the unbalance of grinding wheels produce a severe vibration and noise of grinding machines because of the uneven shedding of abrasive particles and the uneven adsorption of coolant, which has a severe and direct impact on the accuracy and quality of parts. Online balancing is an important and necessary technique to reduce the unbalance causing by these factors and adjust the time-varying balance condition of the grinding wheel. A new active online balancing method using liquid injection and free dripping is proposed in this paper. The proposed online balancing method possesses a continuous balancing ability and the problem of losing balancing ability for the active online balancing method using liquid injection is solved effectively because some chambers are full of liquid. The residual liquid contained in the balancing chambers is utilized as a compensation mass for reducing rotor unbalance, where the rotor phase is proposed herein as a target for determining the machine unbalance. A new balancing device with a controllable injection and free dripping structure is successfully designed. The relationship between the mass of liquid in the balancing chamber and the centrifugal force produced by liquid is identified. The performance of the proposed method is verified by the balancing experiments and the results of these experiments show that the vibration of unbalance response is reduced by 87.3% at 2700 r/min.

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Properties of α-Fe2O3 in Oxide Film of α-Fe Grinding Wheel Without Abrasive Particles

Ferroelectrics ◽

10.1080/00150193.2019.1592503 ◽

2019 ◽

Vol 548 (1) ◽

pp. 1-7 ◽

Cited By ~ 1

Author(s):

Jicai Kuai ◽

Jiaqi Zhang ◽

Dmitrii V. Ardashev ◽

Huali Zhang

Keyword(s):

Oxide Film ◽

Grinding Wheel ◽

Abrasive Particles

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Characteristics of Diamond Abrasive Used in Magnetic Abrasive Finishing of Nickel-Based Superalloys

Journal of Micro and Nano-Manufacturing ◽

10.1115/1.4048866 ◽

2020 ◽

Vol 8 (3) ◽

Author(s):

Jason Ratay ◽

Pei-Ying Wu ◽

Alex Feirvezers ◽

Hitomi Yamaguchi

Keyword(s):

Turbine Blades ◽

Target Surface ◽

Surface Finishing ◽

Complex Geometries ◽

Magnetic Abrasive Finishing ◽

Abrasive Particles ◽

Abrasive Finishing ◽

Wide Range ◽

Abrasive Behavior ◽

Diamond Abrasive

Abstract Nickel-based superalloys have a wide range of high-temperature applications such as turbine blades. The complex geometries of these applications and the specific properties of the materials raise difficulties in the surface finishing. Magnetic abrasive finishing (MAF) has proven effective in finishing the complex geometries. In MAF, the magnetic properties of the workpiece, tool, and abrasive play important roles in controlling finishing characteristics. This paper presents the effects of nickel coating on the abrasive behavior during finishing and resulting finishing characteristics of Ni-based superalloys. The Ni-coated diamond abrasive is more attracted to the magnet than the Ni-based superalloy surface. As a result, fewer Ni-coated diamond abrasive particles, which are stuck between the magnetic-particle brush and the target surface, participate in surface finishing. Because of this, coupled with the reduced sharpness of abrasive cutting edges due to the coating, Ni-coated diamond abrasive cannot effectively smooth the target surface in MAF. However, the Ni coating is worn off during finishing of the hard, rough, additively manufactured surface. Then, the diamond abrasive participates in finishing as uncoated diamond abrasive and facilitates the material removal, finishing the target surface.

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A Novel Superfine Machining Technology Based on the Magnetorheological Effect of Abrasive Slurry

Materials Science Forum ◽

10.4028/www.scientific.net/msf.532-533.145 ◽

2006 ◽

Vol 532-533 ◽

pp. 145-148 ◽

Cited By ~ 2

Author(s):

Jia Bin Lu ◽

Juan Yu ◽

Qiu Sheng Yan ◽

Wei Qiang Gao ◽

Liang Chi Zhang

Keyword(s):

Material Removal ◽

Relative Velocity ◽

Magnetic Particles ◽

Applied Pressure ◽

Grinding Wheel ◽

Machined Surface ◽

Abrasive Particles ◽

Magnetorheological Effect ◽

Mr Effect ◽

Glass Surfaces

Based on the magnetorheological (MR) effect of abrasive slurry, this paper presents an innovative superfine machining method. In this technique, the particle-dispersed MR fluid is used as a special instantaneous bond to cohere abrasive particles and magnetic particles so as to form a dynamical tiny-grinding wheel. This tiny-grinding wheel can be used to polish the surface of brittle materials in millimeter or sub-millimeter scale. The characteristics of the machined glass surfaces examined by the scanning electron microscope (SEM) and the Talysurf roughness tester confirmed the effectiveness of the finishing technique. The machined surface with convex center and concave fringe demonstrates that the material removal process is dominated by the synergy of the applied pressure and the relative velocity between the abrasives and workpiece. In the case of glass finishing, the mode of material removal is found to be plastic, and controlled by the abrasive-wear mechanism.

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Effect of Abrasive on the Machining Performance the EMR-Effect-Based Tiny-Grinding Wheel

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.135.24 ◽

2010 ◽

Vol 135 ◽

pp. 24-29 ◽

Cited By ~ 1

Author(s):

Jia Bin Lu ◽

Qiu Sheng Yan ◽

Hong Tian ◽

Wei Qiang Gao

Keyword(s):

Grain Size ◽

Material Removal ◽

Grinding Wheel ◽

Machining Performance ◽

Coupled Field ◽

Close Relationship ◽

Magneto Rheological ◽

Polishing Fluid ◽

Abrasive Hardness ◽

Diamond Abrasive

Based on the electro-magneto-rheological (EMR) effect, the Fe3O4-based EMR fluid dispersed with micron-sized finishing abrasives is used as a polishing fluid to form a dynamical tiny-grinding wheel under an electro-magnetically coupled field. Using this EMR-effect-based tiny-grinding wheel, experiments were conducted to investigate the effect of the grain size, content and material of abrasive on material removal effect of normal glass. Results indicate that the abrasive can change the chain-like structure of the EMR-effect-based tiny-grinding wheel and influence the material removal ability of the tiny-grinding wheel remarkably. The material removal amount increases with the increase of the content of diamond abrasive in the EMR fluid, and grows slowly when the proportion of diamond abrasive exceeds to 6%. While the grain size of abrasive increases, the material removal amount increases at the beginning and decreases afterwards. The effect of abrasive on material removal depends on the hardness of abrasive, the greater the abrasive hardness, the higher the material removal efficiency. The machined area has a close relationship with both the density and grain size of abrasive.

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

REVIEWS ON ADVANCED MATERIALS SCIENCE ◽

10.1515/rams-2021-0054 ◽

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.

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Study on the Cutting Properties of the Singer Layer Metal Bonded cBN Grinding Wheel by Electroplating in Grinding of Heat-Treated Steel SKD11

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.889.80 ◽

2019 ◽

Vol 889 ◽

pp. 80-86

Author(s):

Truong Hoanh Son ◽

Tran Thi Van Nga

Keyword(s):

Depth Of Cut ◽

Grinding Wheel ◽

Wheel Surface ◽

Abrasive Particles ◽

Sem Image ◽

Grinding Ratio ◽

Heat Treated ◽

Two Factors ◽

Cbn Grinding Wheel ◽

Heat Treated Steel

This article presents preliminary investigations on the cutting ability of the singer layer metal-bonded cBN grinding wheel manufactured by electroplating method at Vietnamese laboratory. The cutting ability of the grinding wheel is evaluated by two factors: grinding ratio G and surface roughness of workpiece. These results are compared to those of the Japanese grinding wheels. The experimental results showed that the fabricated cBN grinding wheel has good cutting ability with high grinding ratio G. The value of the grinding ratio was 600 to 1800 in the grinding process of SKD11 steel (hardness of 62-63HRC) at the grinding speed V of 12.56m/s, feed rate S of 300mm/min, depth of cut t of 0.01mm. The maximum grinding ratio (1800) is equivalent to the average grinding ratio of the Japanese grinding wheel. The grinding ratio is also maintained up to 26 cutting hours. The good grinding surface was achieved with the average Ra of 2.5μm. In addition, the bonding of cBN abrasive to the wheel body was observed with scanning electron microscope (SEM) of the surface of grinding wheel after the cutting process. The SEM image shown that the cBN abrasive particles were not removed from the wheel surface.

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Performance Evaluation of Electro-Rheological Fluid and Its Applications to Micro-Parts Fine-Machining

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.315-316.352 ◽

2006 ◽

Vol 315-316 ◽

pp. 352-356

Author(s):

Qiu Sheng Yan ◽

F.F. Bi ◽

N.Q. Wu

Keyword(s):

Performance Evaluation ◽

Electric Field ◽

Electrorheological Fluid ◽

Grinding Wheel ◽

Grinding Process ◽

Aspheric Surface ◽

Surface Machining ◽

Abrasive Particles ◽

Micro Parts ◽

Er Fluid

This article first presents the performance of Electrorheological Fluid (ER fluid). Thus, a new-style machining technique based on ER effect to form a tiny grinding wheel is developed for superfine machining. By adding abrasive particles to ER, an array of stable chains of ER particles can be shaped when an electric field is applied and abrasive particles are fixed to these chains structure. When the tip of tool is rotated, the abrasive particles rotate with the flow and a superfine grinding process come into being. This process is expected to be applicable to the aspheric surface machining of micro miniature components made of optic glass or other hard-brittle materials.

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