scholarly journals Quantitative description concerning wear forms of cBN single-layer grinding wheels working with different grinding speeds

Mechanik ◽  
2018 ◽  
Vol 91 (10) ◽  
pp. 803-805
Author(s):  
Andrzej Kawalec ◽  
Anna Bazan
Keyword(s):  
Quantitative Description ◽  
Single Layer ◽  
Grinding Wheel ◽  
Grinding Wheels ◽  
Cbn Grinding Wheel

The paper presents a method of quantifying the observed wear forms of electroplated cBN grinding wheel. The volume of fractured, pulled out or smeared abrasive was determined. Three grinding wheels working with different grinding speeds were tested.

Development of Vitrified Bond CBN Wheel for Internal Precision Grinding of the Air-Conditioner Compressor Piston Hole

2006 ◽  
Vol 304-305 ◽  
pp. 29-32 ◽  
Author(s):  
Hang Gao ◽  
Y.G. Zheng ◽  
W.G. Liu ◽  
Jian Hui Li
Keyword(s):  
Cost Effective ◽  
Grinding Wheel ◽  
Manufacturing Cost ◽  
Air Conditioner ◽  
Grinding Wheels ◽  
Precision Grinding ◽  
Grinding Performance ◽  
Compressor Piston ◽  
Vitrified Bond ◽  
Cbn Grinding Wheel

Manufacturing of vitrified bond CBN wheels for internal precision grinding of the air-conditioner compressor piston hole is still big challenge to all of the domestic manufacturers. Recently, by choosing pre-melting mixed CBN abrasives and a proper sintering process, a cost-effective method was conceived to produce grinding wheels of comparative quality. The grinding performance of wheels was evaluated with a series of internal precision grinding of compressor piston hole. Experimental results show that the vitrified bond CBN grinding wheel produced by this method has better grinding performance, and can be substitute to the same type of grinding wheels imported. But the manufacturing cost is only 60% of the wheel imported according to estimation.

Optimization and Application of Laser-Dressed cBN Grinding Wheels

2016 ◽  
Vol 1136 ◽  
pp. 90-96 ◽  
Author(s):  
Ali Zahedi ◽  
Bahman Azarhoushang ◽  
Javad Akbari
Keyword(s):  
Environmental Concerns ◽  
Grinding Wheel ◽  
Grinding Process ◽  
Grinding Wheels ◽  
Average Roughness ◽  
Cylindrical Grinding ◽  
Laser Dressing ◽  
Dressing Tool ◽  
Cbn Grinding Wheel ◽  
Spindle Power

Laser-dressing has been shown to be a promising method for overcoming some shortcomings of the conventional methods such as high wear of the dressing tool and its environmental concerns, high induced damage to the grinding wheel, low form flexibility and low speed. In this study, a resin bonded cBN grinding wheel has been dressed with a picosecond Yb:YAG laser. The efficiency of the laser-dressed grinding wheels has been compared with the conventionally dressed and sharpened grinding wheels through execution of cylindrical grinding tests on a steel workpiece (100Cr6). The conventional dressing and sharpening processes have been performed by using a vitrified SiC wheel and vitrified alumina blocks, respectively. By recording the spindle power values along with the surface topography measurements of the ground workpieces and the extraction of two roughness parameters (the average roughness Ra and the average roughness depth Rz), it is possible to provide an assessment of the cylindrical grinding process with different dressing conditions i.e. laser-dressing and conventional dressing. Accordingly, a strategy will be proposed to optimize the cylindrical grinding process with laser-dressed wheels regarding the forces and roughness values.

Detailed Analysis and Description of Grinding Wheel Topographies

2017 ◽  
Vol 139 (5) ◽  
Author(s):  
Markus Weiß ◽  
Fritz Klocke ◽  
Sebastian Barth ◽  
Matthias Rasim ◽  
Patrick Mattfeld
Keyword(s):  
Detailed Analysis ◽  
Functional Properties ◽  
Quantitative Description ◽  
Cutting Edge ◽  
Grinding Wheel ◽  
Grinding Process ◽  
Grinding Wheels ◽  
New Approach ◽  
Wheel Topography ◽  
The Impact

In this paper, an innovative approach for the description of the functional properties of a grinding wheel surface is discussed. First, the state of the art in the description of grinding wheel topographies is summarized. Furthermore, the fundamentals for a new approach for the quantitative description of grinding wheel topographies are provided. In order to analyze the functional properties of a grinding wheel's topography depending on its specification, grinding experiments were carried out. For the experimental investigations vitrified, synthetic resin bonded and electroplated grinding wheels with varied compositions were analyzed. During the experiments, the topographies of the investigated grinding wheels have been analyzed by means of the topotool in detail. The developed software tool allows a detailed description of the kinematic cutting edges depending on the grinding process parameters and the grinding wheel specification. In addition to the calculation of the number of kinematic cutting edges and the area per cutting edge, a differentiation of the cutting edge areas in normal and tangential areas of the grinding wheel's circumferential direction is implemented. Furthermore, the topotool enables to analyze the kinematic cutting edges shape by calculating the angles of the grain in different directions. This enables a detailed analysis and a quantitative comparison of grinding wheel topographies related to different grinding wheel specifications. In addition, the influence of the dressing process and wear conditions to the grinding wheel topography can be evaluated. The new approach allows a better characterization of the contact conditions between grinding wheel and workpiece. Hence, the impact of a specific topography on the grinding process behavior, the generated grinding energy distribution, and the grinding result can be revealed.

scholarly journals Influence of grinding wheel velocity on the wear of electroplated cBN grinding wheel

Mechanik ◽  
2017 ◽  
Vol 90 (8-9) ◽  
pp. 690-692 ◽  
Author(s):  
Andrzej Kawalec ◽  
Anna Bazan ◽  
Marek Krok
Keyword(s):  
Active Surface ◽  
Grinding Force ◽  
Grinding Wheel ◽  
Grinding Wheels ◽  
Force Components ◽  
Cbn Grinding Wheel

Presented are the results of research on changes of the grinding force components and selected topography parameters of grinding wheel active surface during grinding wheel life. Electroplated cBN grinding wheels working with different rotation speeds were examined.

scholarly journals Variation of Grain Height Characteristics of Electroplated cBN Grinding-Wheel Active Surfaces Associated with Their Wear

Metals ◽  
2020 ◽  
Vol 10 (11) ◽  
pp. 1479 ◽  
Author(s):  
Anna Bazan ◽  
Andrzej Kawalec ◽  
Tomasz Rydzak ◽  
Pawel Kubik
Keyword(s):  
Process Parameters ◽  
Single Layer ◽  
Active Surface ◽  
Peak Height ◽  
Grinding Wheel ◽  
Workpiece Material ◽  
Material Loss ◽  
Active Surfaces ◽  
The Mean ◽  
Cbn Grinding Wheel

During the operation of a single-layer grinding wheel (SLGW), irreversible changes occur on its active surface due to wear. The study of grinding-wheel microgeometry changes can be based on the measurement of the surface texture as well as the determination and analysis of its parameters. The article deals with the selection of suitable texture parameters and an appropriate mathematical model carrying information about the SLGW condition. In the study, samples of Pyrowear 53 steel were ground using electroplated cBN single-layer grinding wheels until they were completely worn out or removed assumed volume of the workpiece material. Each SLGW worked with constant process parameters. Among the 144 parameters tested, the highest sensitivity to changes in wheel active surfaces caused by wear was shown by the mean value of the mean island heights Zmean_m. In-depth research was conducted for Zmean_m and reduced peak height Spk. Compared to Spk, Zmean_m has proven to be a better measure of wear, especially when large areas of sticking occur. Moreover, the second-degree models linking Zmean_m and Spk to the process parameters and the specific material loss were better suited to the empirical data than the exponential models.

On Performance of Chemically Bonded Single-Layer CBN Grinding Wheel

CIRP Annals ◽  
1990 ◽  
Vol 39 (1) ◽  
pp. 309-312 ◽  
Author(s):  
A.K. Chattopadhyay ◽  
L. Chollet ◽  
H.E. Hintermann
Keyword(s):  
Single Layer ◽  
Grinding Wheel ◽  
Cbn Grinding Wheel

Brazed CBN Grinding Wheel with Ag-Base Filler Alloy

2004 ◽  
Vol 471-472 ◽  
pp. 11-15 ◽  
Author(s):  
Wen Feng Ding ◽  
Jiu Hua Xu ◽  
J.B. Lu ◽  
Yu Can Fu ◽  
Bing Xiao ◽  
...  
Keyword(s):  
Cubic Boron Nitride ◽  
Xrd Analysis ◽  
Boride Layer ◽  
Grinding Wheel ◽  
Filler Alloy ◽  
X Ray Diffraction ◽  
Grinding Wheels ◽  
Excellent Performance ◽  
Energy Dispersion Spectrometer ◽  
Cbn Grinding Wheel

In this paper, the disadvantages of the current CBN (Cubic Boron Nitride) grinding wheels were firstly introduced briefly, for indicating that it was very urgent and important to develop new kinds of grinding wheels with excellent performance to replace the conventional wheels. Then high temperature brazing experiments of monolayer CBN wheels with Ag-Cu-Ti filler alloy were carried out. The result shows that the filler alloy has good wetting capability towards CBN grits. The results of scanning electron microscope (SEM) and energy dispersion spectrometer (EDS), as well X-ray diffraction (XRD) analysis show that, just because during brazing titanium atoms in filler alloys segregated preferentially to the surface of the CBN to form Ti-nitride or Ti-boride layer by reaction between titanium atoms and nitride and boron atoms at elevated temperature, strong chemical joining was formed in the interface between CBN grits and filler alloys. Finally, the contrastive grinding experiments were performed between the monolayer brazed CBN grinding wheels and the electroplated ones. The results show that the brazed wheels have more excellent performance than the latter.

scholarly journals Investigation of the Wear Behavior of Abrasive Grits in a Dry Machining Inconel 718 Narrow-Deep-Groove with a Single-Layer Cubic Boron Nitride Grinding Wheel

2021 ◽  
Author(s):  
Guang Li ◽  
Guoxing Liang ◽  
Xingquan Shen ◽  
Ming Lv ◽  
Donggang Liu ◽  
...  
Keyword(s):  
Boron Nitride ◽  
Inconel 718 ◽  
Wear Behavior ◽  
Cubic Boron Nitride ◽  
Single Layer ◽  
Grinding Wheel ◽  
Bonding Layer ◽  
Side Edge ◽  
Deep Groove ◽  
Cbn Grinding Wheel

Abstract The wear behavior of a single-layer electroplated cubic boron nitride (cBN) grinding wheel was investigated in creep feed profile grinding Inconel 718 narrow-deep-groove with a width of 2 mm. In this paper, the protrusion height of cBN grits on the side edge of the grinding wheel was measured by three-dimensional optical profiler, and a scanning electron microscope was used to detect the topography of worn cBN grit and the nickel bonding layer. The investigation results indicated that the steady wear stage of the grinding wheel shared more than 84.6% of the wheel lifespan, and the machining precision of the grinding wheel was kept at a high level. The fracture mode of the cBN grit was proven to be cleavage. The source of the cleavage cracks was observed on the surface of wear flat or the side surface of the cBN grit. The holding strength of cBN grit could be weakened due to the joint surface breakage, the displacement of grit, or the cracks of the nickel bonding layer. The transition layer was contributed to the decrease of the bonding strength. Severe macro fractures and the concentration of pulled out grits were observed on the transition edge and the inner area of the side edge, separately. This study provides a deep understanding of the wear mechanism of a single-layer electroplated cBN grinding wheel.

Experiment Studies of Nd:YAG Laser Assisted Dressing Technique for Metal-Bonded CBN Grinding Wheel by Crankshaft Grinding

2013 ◽  
Vol 652-654 ◽  
pp. 2147-2152
Author(s):  
Guo Jun Zhang ◽  
Ming Zhen Li ◽  
Yu Huang ◽  
Shang Zhang
Keyword(s):  
Nd:Yag Laser ◽  
Grinding Wheel ◽  
Grinding Process ◽  
Grinding Wheels ◽  
Dressing Method ◽  
Pulsed Nd:Yag Laser ◽  
Before And After ◽  
Low Efficiency ◽  
Manufacturing Productivity ◽  
Cbn Grinding Wheel

Superabrasive grinding wheels are widely applied in today’s grinding industries due to its advantages such as long tool life, low wearing effect, fine dimensional stability etc. Dressing is one of most important processes of grinding operation that largely influences the workpiece quality and manufacturing productivity. However, dressing of superabrasive grinding wheel is low efficiency by conventional dressing method. In this paper, an a flashlamp-pumped pulsed Nd:YAG laser assisted dressing technique for metal-bonded CBN grinding wheel is developed, and experiment results demonstrate the proposed laser-assisted dressing technique is greatly improving dressing efficiency, reducing dressing time, extending the life of diamond dresser comparing to conventional dressing method. Key paramters of straintness, cylindricity and roughness of Crankshaft between before and after dressing operation is contrasted, the results proves that in the practical grinding process, the laser assisted dressing technique has similiar quality in contrast to conventional diamond dressing method and highly promotes the dressing efficiency.

Grinding Titanium Alloy with Brazed Monolayer CBN Wheels

2007 ◽  
Vol 359-360 ◽  
pp. 33-37 ◽  
Author(s):  
Chang Yong Yang ◽  
Jiu Hua Xu ◽  
Wen Feng Ding ◽  
Sheng Ting Tong
Keyword(s):  
Titanium Alloy ◽  
Surface Layer ◽  
Process Parameters ◽  
Specific Energy ◽  
Grinding Wheel ◽  
Grinding Temperature ◽  
Grinding Wheels ◽  
Excellent Performance ◽  
Design Requirements ◽  
Cbn Grinding Wheel

This paper deals with an investigation of the grindability of Titanium alloy Ti–6Al–4V with brazed monolayer CBN grinding wheels, and systematically studies the effect of process parameters on specific energy and grinding temperature. In the investigation, a groove is machined with a brazed monolayer CBN grinding wheel, and the dimension accuracy of groove has been proved to meet the design requirements. There is no microcrack in surface layer of the groove, and the depth of work-hardening is less than 40 μm, which indicates that the grinding affected zone is small. The results show that brazed monolayer CBN grinding wheels have excellent performance during grinding titanium alloy.

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