scholarly journals Influence of Electroplated CBN Wheel Wear on Grinding Surface Morphology of Powder Metallurgy Superalloy FGH96

Materials ◽  
2020 ◽  
Vol 13 (4) ◽  
pp. 1005
Author(s):  
Haining Wang ◽  
Xun Li ◽  
Ziming Wang ◽  
Rufeng Xu
Keyword(s):  
Powder Metallurgy ◽  
Surface Morphology ◽  
Engineering Application ◽  
Turbine Disk ◽  
Grinding Wheel ◽  
Wheel Wear ◽  
Cbn Wheel ◽  
Abrasive Grain ◽  
Depth Analysis ◽  
Cbn Grinding Wheel

The electroplated cubic boron nitride (CBN) wheel has perfect precision retention and high-temperature grinding performance, which is widely used in the field of grinding difficult-to-cut materials, such as nickel-based superalloy. However, the research on the influence law and mechanism of grinding surface morphology affected by the wear state of small-size grinding wheel is insufficient, which limits the further promotion and application of electroplated CBN wheel in the field of precision grinding of superalloy materials. Based on the in-depth analysis of the structure of FGH96 turbine disk, and combined with the actual processing requirements, the electroplated CBN wheel was designed, and the abrasive grains size selection experiments and CBN wheel wear experiments were then carried out for the powder metallurgy superalloy FGH96 in turn. The influence law of the abrasive grain size of CBN grinding wheel and the wear state of grinding wheel on the surface morphology was investigated, respectively. The obtained results showed that under the given processing parameters, the surface roughness Ra using 400# and 600# electroplated CBN wheels are around 0.66 μm and 0.53 μm during the normal wear state of grinding wheels, respectively, which can meet the requirement of surface quality less than Ra 0.8 μm in engineering application of turbine disk, and prove the feasibility of small-size CBN wheel grinding FGH96. In addition, the failure form of electroplated CBN wheel is mainly the accumulation and adhesion of abrasive debris, and the crushing and shedding of abrasive grain are hard to appear.

Ultrasonic Vibration Dressing Technology on CBN Grinding Wheel and its Grinding Performance on K9 Glass

2014 ◽  
Vol 1004-1005 ◽  
pp. 1340-1343
Author(s):  
Quan Mao He ◽  
Jie Zhao ◽  
Fei Ling Shen
Keyword(s):  
Surface Morphology ◽  
Ultrasonic Vibration ◽  
Experimental Results ◽  
Grinding Wheel ◽  
Cbn Wheel ◽  
Grinding Performance ◽  
Grinding Ratio ◽  
Cbn Grinding Wheel ◽  
Morphology Characteristics ◽  
K9 Glass

CBN wheel grinding performance on K9 glass is experimentally analyzed, which is using ultrasonic vibration assisted mechanical dressing, and dressing modes have different influences on grinding performance on the basis of the grinding surface morphology characteristics of K9 glass. The experimental results show that the CBN grinding wheel of vibration dressing mode has relatively large grinding ratio compared with ordinary dressing, and its microstructure on the grinding surface is strongly influenced by dressing modes and grinding speed.

Surface integrity of quenched steel 1045 machined by CBN grinding wheel and SiC grinding wheel

2017 ◽  
Vol 8 (2) ◽  
pp. 179-187 ◽  
Author(s):  
Kankan Ji ◽  
Xingquan Zhang ◽  
Shubao Yang ◽  
Liping Shi ◽  
Shiyi Wang ◽  
...  
Keyword(s):  
Surface Roughness ◽  
Surface Morphology ◽  
Compressive Stress ◽  
Surface Integrity ◽  
Grinding Wheel ◽  
Micro Hardness ◽  
Content Type ◽  
Quenched Steel ◽  
Cut Depth ◽  
Cbn Grinding Wheel

Purpose The purpose of this paper is to evaluate surface integrity of quenched steel 1045 ground drily by the brazed cubic boron nitride (CBN) grinding wheel and the black SiC wheel, respectively. Surface integrity, including surface roughness, sub-surface hardness, residual stresses and surface morphology, was investigated in detail, and the surface quality of samples ground by two grinding wheels was compared. Design/methodology/approach In the present work, surface integrity of quenched steel 1045 machined by the CBN grinding wheel and the SiC wheel was investigated systematically. All the specimens were machined with a single pass in the down-cutting mode of dry condition. Surface morphology of the ground specimen was observed by using OLYMPUS BX51M optical microscopy. Surface roughness of seven points was measured by using a surface roughness tester at a cut-off length of 1.8 mm and the measurement traces were perpendicular to the grinding direction. Sub-surface micro-hardness was measured by using HVS-1000 digital micro-hardness tester after the cross-section surface was polished. The residual stress was tested by using X-350A X-ray stress analyzer. Findings When the cut depth is increased from 0.01 to 0.07 mm, the steel surface machined by the CBN wheel remains clear grinding mark, lower roughness, higher micro-hardness and higher magnitude of compressive stress and fine microstructure, while the surface machined by the SiC grinding wheel becomes worse with increasing of cut depth. The value of micro-hardness decreases, and the surface roughness increases, and the surface compressive stress turns into tensile stress. Some micro-cracks and voids occur when the sample is processed by the SiC grinding wheel with cut depth 0.07 mm. Originality/value In this paper, the specimens of quenched steel 1045 were machined by the CBN grinding wheel and the SiC wheel with various cutting depths. The processing quality resulted from the CBN grinding wheel is better than that resulted from the SiC grinding wheel.

Experimental Characterization of Electroplated CBN Grinding Wheel Wear: Topology Evolution and Interfacial Toughness

2014 ◽  
Author(s):  
Tianyu Yu ◽  
Ashraf F. Bastawros ◽  
Abhijit Chandra
Keyword(s):  
Grinding Wheel ◽  
Activation Process ◽  
Time To Failure ◽  
Wheel Surface ◽  
Wheel Wear ◽  
Modeling Framework ◽  
Topological Evolution ◽  
Pull Out ◽  
Topological Features ◽  
Cbn Grinding Wheel

The wear rate of a grinding wheel directly affects the workpiece surface integrity and tolerances. This paper summarizes a combined experimental-modeling framework for life cycle prediction of an electroplated Cubic Boron Nitride (CBN) grinding wheel, typically utilized in nickel-based superalloy grinding. The paper presents an experimental framework to facilitate the formulation of a micro-mechanics based modeling framework. The presented work investigates the topological evolution of the grinding wheel surface and mechanisms of grit failure via depth profiling, digital microscopy and scanning electron microscopy. The results are used to elucidate the statistical evolution of the grinding wheel surface. Different modes of grit failure, including grit attritious wear, fracture and pull out haven been identified. The analysis of the surface topological features indicates a unique grit activation process, leading to a non-uniform spatial distribution of the grit wear. Additionally, single grit pull out experiment has been conducted to assess the residual strength of the grit-wheel interface and the associated state of damage percolation. The experimental results can be utilized in developing a life expectancy model for the CBN grinding wheel to assess the grit mean time to failure as well as grit surface topological evolution as a function of the process parameters.

The Design and Analysis of a Polypropylene Hub CBN Wheel to Suppress Grinding Chatter

1999 ◽  
Vol 121 (1) ◽  
pp. 28-31 ◽  
Author(s):  
D. M. McFarland ◽  
G. E. Bailey ◽  
T. D. Howes
Keyword(s):  
Forced Vibration ◽  
Grinding Wheel ◽  
Design Features ◽  
Regenerative Chatter ◽  
Cbn Wheel ◽  
Grinding Chatter ◽  
Design Requirements ◽  
Cbn Grinding Wheel

This research investigated the addition of flexibility into a CBN grinding wheel to suppress regenerative chatter, and illustrates some design features that should be present in such a wheel. Flexibility was added by replacing the hub of an aluminumhub CBN grinding wheel with polypropylene, decreasing the bulk stiffness to approximately 12 percent of its original value. Experiments showed that the modified wheel met the design requirements and suppressed chatter, but exhibited increased forced vibration at two frequencies. When the polypropylene between the flanges was replaced by an aluminum insert, one forced vibration disappeared. There is evidence that such a flexible wheel with a homogeneous rim would outperform a standard aluminum hub wheel.

Experimental Research on CBN Grinding Wheel Mechanical Dressing with Ultrasonic Vibration Assistance

2010 ◽  
Vol 154-155 ◽  
pp. 573-577 ◽  
Author(s):  
Guo Fu Gao ◽  
Bo Zhao ◽  
Jie Zhao ◽  
Jing Lin Tong
Keyword(s):  
Surface Topography ◽  
Ultrasonic Vibration ◽  
Experimental Research ◽  
Experimental Results ◽  
Clear Relationship ◽  
Grinding Wheel ◽  
Acoustic Parameters ◽  
Cbn Wheel ◽  
Vibration Assistance ◽  
Cbn Grinding Wheel

The experimental research on CBN grinding wheel mechanical dressing assisted by ultrasonic vibration was carried out. Experimental results showed that ultrasonic vibration dressing is capable to improve surface topography and roundness of CBN wheel as other untraditional dressing methods. Compared with traditionally mechanical dressing, the counts of static effective grains of CBN grinding wheel dressed assisted by ultrasonic vibration increased clearly and it had clear relationship with the acoustic parameters and the dressing lead. The grains had a large protrusion height and kept good integrity after ultrasonic dressing. The technology of vibration dressing is able to prepare precisely the CBN grinding wheel.

Simulation of Vitrified CBN Grinding Wheel Abrasive Wear Based on SPH

2011 ◽  
Vol 317-319 ◽  
pp. 498-502
Author(s):  
Jing Qiang Zhang ◽  
Peng Guan ◽  
Chong Su ◽  
Wan Shan Wang
Keyword(s):  
Abrasive Wear ◽  
Grinding Wheel ◽  
Wheel Wear ◽  
Wear Model ◽  
Wear Process ◽  
Grinding Wheel Wear ◽  
Smoothed Particle ◽  
Smoothed Particle Hydrodynamic ◽  
Cbn Grinding Wheel ◽  
Vitrified Cbn

This paper used spatial random cutting plane method for modeling the real irregular grain shapes, and method of smoothed particle hydrodynamic (SPH) was used to establish CBN grinding wheel abrasive wear model. In order to research the wear mechanism of CBN abrasive and the relationships between grinding parameters and grinding wheel wear, simulation of the wheel abrasive wear process was simulated by the LS-DYNA explicit dynamics. According to the results obtained by simulation of abrasive wear model which has the same law with the actual wear abrasive, it is has realistic instructive significance to the actual grinding process of vitrified CBN grinding wheel.

Porous Composite-Bonded CBN Grinding Wheel with Alumina Bubbles

2012 ◽  
Vol 565 ◽  
pp. 46-51 ◽  
Author(s):  
Z.Z. Chen ◽  
Wen Feng Ding ◽  
Jiu Hua Xu ◽  
C.J. Song ◽  
Y.C. Fu ◽  
...  
Keyword(s):  
Bending Strength ◽  
Sintering Temperature ◽  
Grinding Force ◽  
Grinding Wheel ◽  
Grinding Temperature ◽  
Porous Composite ◽  
Cbn Wheel ◽  
Regular Shape ◽  
New Type ◽  
Cbn Grinding Wheel

Fabrication experiments of porous composite-bonded CBN wheels were conducted using alumina (Al2O3) bubbles, CBN grains, Cu-Sn-Ti alloy and graphite particles. Influence of sintering parameters and porosity on the bending strength of the CBN composite blocks was measured and analyzed. Dressing and grinding practice was carried out. The results show that the optimal sintering temperature of the CBN composite blocks is 880°C. When the porosity of composite blocks is 8-45 %, the strength reaches 51-103 MPa. Regular shape of the pores is obtained after dressing. Both the grinding force and grinding temperature of the composite-bonded CBN wheel are lower than that of the vitrified one under the same grinding condition, which indicates the better grinding performance of the new-type porous composite-bonded CBN wheel.

scholarly journals An Analysis of Electroplated cBN Grinding Wheel Wear and Conditioning during Creep Feed Grinding of Aeronautical Alloys

Metals ◽  
2018 ◽  
Vol 8 (5) ◽  
pp. 350 ◽  
Author(s):  
Gorka Vidal ◽  
Naiara Ortega ◽  
Héctor Bravo ◽  
Mirentxu Dubar ◽  
Haizea González
Keyword(s):  
Grinding Wheel ◽  
Wheel Wear ◽  
Grinding Wheel Wear ◽  
Creep Feed Grinding ◽  
Creep Feed ◽  
Cbn Grinding Wheel

The Design and Manufacture of Quick-Point Grinding Wheel

2009 ◽  
Vol 416 ◽  
pp. 365-369 ◽  
Author(s):  
Jian Qiu ◽  
Ya Dong Gong ◽  
Yue Ming Liu ◽  
Yan Cheng Zhang
Keyword(s):  
Mechanical Properties ◽  
Finite Element Method ◽  
Finite Element ◽  
Bonding Strength ◽  
Wheel Speed ◽  
Grinding Wheel ◽  
Wheel Wear ◽  
High Quality ◽  
Design And Manufacture ◽  
Cbn Grinding Wheel

It is important that preparing high quality grinding wheel to match Quick-point grinding processing. Using brazed CBN grinding wheel, grains can be combined with wheel matrix in high bonding strength, which is helpful to minimize wheel wear and to gain a good grinding ability. By establishing the connection between stress and its increment, the mechanical properties of wheel under different conditions is described. The wheel speed has effect on wheel matrix displacement and stress. Applying finite element method to optimize wheel structure, a final grinding wheel for Quick-point grinding is obtained.

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