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.

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.

The Wear of Grinding Wheels: Part 1—Attritious Wear

1971 ◽  
Vol 93 (4) ◽  
pp. 1120-1128 ◽  
Author(s):  
S. Malkin ◽  
N. H. Cook
Keyword(s):  
Surface Finish ◽  
Grinding Force ◽  
Grinding Wheels ◽  
Precision Grinding ◽  
Grinding Forces ◽  
Workpiece Surface ◽  
Abrasive Grain ◽  
The Subject ◽  
Force Components ◽  
Sliding Force

An investigation of attritious and fracture wear of grinding wheels in precision grinding is described in a two paper sequence. Attritious wear, the subject of this first paper, refers to the dulling of the abrasive grain due to rubbing against the workpiece surface. The amount of dulling, measured by the area of the wear flats on the surface of the wheel, is found to be directly related to the grinding forces. In general, both the vertical and horizontal grinding force components increase linearly with the wear flat area. This is explained by considering the grinding force as the sum of a cutting force due to chip formation and a sliding force due to rubbing between the wear flats and workpiece. Related studies of wheel dressing, surface finish, and workpiece burn are also presented.

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.

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.

Contact Stiffness of Grinding Wheels due to the Difference of Table Feed Rate

2009 ◽  
Vol 76-78 ◽  
pp. 137-142 ◽  
Author(s):  
Takazo Yamada ◽  
Hwa Soo Lee ◽  
Kohichi Miura
Keyword(s):  
Stationary State ◽  
Feed Rate ◽  
Contact Stiffness ◽  
Grinding Force ◽  
Grinding Wheel ◽  
Grinding Wheels ◽  
Abrasive Grain ◽  
Residual Stock ◽  
The Difference ◽  
Stock Removal

Usually, the contact stiffness between a grinding wheel and a workpiece has been measured in a stationary state. So, in this study, the contact stiffness under the grinding operation is measured under different table feed rate of the workpiece. From this result, it is known that, while the contact stiffness in the stationary state increases with the increase of the contact force, the contact stiffness under the grinding operation decreases with the increase of the normal grinding force relating the table feed rate. In this paper, since the number of contacting abrasive grain with workpiece is constant irrespective of the table feed rate, and the residual stock removal of workpiece is varied by the table feed rate, it is clarified that the contact stiffness under the grinding operation differs from the contact stiffness measured by the stationary state.

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.

The effect of sulfurization on the grinding wheel cutting ability in the internal cylindrical grinding of nickel superalloys

2016 ◽  
Vol 231 (1) ◽  
pp. 140-154
Author(s):  
Krzysztof Nadolny ◽  
Walery Sienicki ◽  
Michał Wojtewicz
Keyword(s):  
Experimental Tests ◽  
Active Surface ◽  
Bearing Steel ◽  
Grinding Wheel ◽  
Nickel Superalloys ◽  
Grinding Wheels ◽  
Adhesive Properties ◽  
Plunge Grinding ◽  
Abrasive Grains ◽  
Internal Cylindrical Grinding

One possible way of preventing excessive growth of smearings/loads on the grinding wheel active surface is the introduction of compounds such as sulfur, graphite, or wax into the grinding wheel volume which exerts an active influence on adhesion during the process of impregnation. Limiting the formation of smearings/loads on the grinding wheel active surface is of crucial importance to achieve effective grinding of hard-to-cut materials (such as nickel superalloys) which are characterized by considerable ductility and a strong chemical affinity to abrasive grains, among other things. This article presents the results of experimental tests performed on plunge grinding and the influence of sulfur impregnation of grinding wheels on the smearing/load intensity on the grinding wheel active surface during the process of internal cylindrical plunge grinding of openings made from Inconel® alloy 600 and Incoloy® alloy 800HT®. Bearing steel 100Cr6 was included in the tests as a reference material. Grinding wheels were impregnated with a new method of gravitational sulfurization combined with centrifuging. The experiments carried out show that the adhesive properties of sulfur allowed for considerable limitation of smearing/loading of the grinding wheel active surface with machined material. This mainly concerned limiting the formation of the largest and most technologically undesirable smearings/loads of the intergranular spaces. The presence of sulfur in the grinding wheel volume had a minor influence on the intensity of smearings/loads in the microareas of the active abrasive grains’ apexes. The tests also showed an increase of 32%–49% in the value of parameter Sa in the surfaces ground with grinding wheels impregnated with sulfur for all the examined materials.

scholarly journals Analysis of influence of the mono-crystalline corundum grinding wheel wear on grinding forces and roughness parameters in peripheral surface grinding of 100Cr6 steel

Mechanik ◽  
2018 ◽  
Vol 91 (8-9) ◽  
pp. 702-704
Author(s):  
Marcin Żółkoś ◽  
Witold Habrat ◽  
Janusz Świder ◽  
Elżbieta Socha
Keyword(s):  
Normal Component ◽  
Grinding Force ◽  
Grinding Wheel ◽  
Profile Measurement ◽  
Roughness Parameters ◽  
Wheel Wear ◽  
Grinding Wheel Wear ◽  
Peripheral Surface ◽  
Force Components ◽  
Changes Over Time

The paper presents the experimental study conditions and results of M3X60K5VE01-35 monocorundum with vitrified bond grinding wheel wear in 100Cr6 steel peripheral grinding process. The effect of grinding wheel wear on the values of grinding force components as well as surface roughness parameters was analyzed. The grinding wheel wear was determined by profile measurement of the active grinding wheel surface using an inductive sensor. It was shown that the increase in the normal component of the grinding force during the process can be an acceptable criterion for wear of the grinding wheel due to the quasi-linear changes over time.

Study on Radial Deformation of CBN Grinding Wheel Considering Centrifugal Force and Grinding Heat

2013 ◽  
Vol 797 ◽  
pp. 500-504
Author(s):  
Xue Zhi Wang ◽  
Wan Shan Wang ◽  
Tian Biao Yu ◽  
Na Yuan ◽  
Xue Sun
Keyword(s):  
Finite Element ◽  
Centrifugal Force ◽  
High Speed ◽  
Grinding Force ◽  
Grinding Wheel ◽  
Machining Accuracy ◽  
Radial Deformation ◽  
Element Analysis ◽  
Grinding Speed ◽  
Cbn Grinding Wheel

For ultra-high-speed grinding, the deformation of grinding wheel has a greater impact on the machining accuracy. Finite element method was used to study the radial deformation of the CBN grinding wheel considering centrifugal force and grinding heat. The study shows that the effects of centrifugal force and grinding heat are same magnitude, and the proportion changes with the change of grinding speed and grinding force. By finite element analysis, it is possible to solve the grinding wheel the radial deformation and grinding temperature under different grinding speed and grinding force, and it also provides theoretical support for predicting the machining accuracy, compensating precision and avoiding grinding burn.

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