Automation of calculations of cutting modes taking into account the wear of cubic boron nitride tools when applying solid lubricants

2021 ◽  
pp. 67-70
Author(s):  
Keyword(s):  
Boron Nitride ◽  
High Speed ◽  
Solid Lubricant ◽  
Cubic Boron Nitride ◽  
High Speed Steel ◽  
Solid Lubricants ◽  
Grinding Wheel ◽  
Grinding Wheels ◽  
Ceramic Bond ◽  
Calculation System

The effect of a solid lubricant on the wear of cubic boron nitride grinding wheels on a ceramic bond of different hardness and grain size in the processing of high-speed steel is investigated. The dependences of the change in the wear of cubic boron nitride on the parameters of the processing mode are determined. An automated calculation system is proposed to control the consumption of cubic boron nitride grinding wheels in production conditions. Keywords: solid lubricant, grinding, high speed steel, cubic boron nitride grinding wheel, consumption, wear, grinding mode. [email protected]

Effective thermal properties of grinding wheels and grains

1998 ◽  
Vol 212 (8) ◽  
pp. 661-669 ◽  
Author(s):  
M N Morgan ◽  
W B Rowe ◽  
S C E Black ◽  
D R Allanson
Keyword(s):  
Thermal Conductivity ◽  
Thermal Properties ◽  
Boron Nitride ◽  
Thermal Performance ◽  
Cubic Boron Nitride ◽  
Energy Partitioning ◽  
Grinding Wheel ◽  
Grinding Wheels ◽  
Abrasive Grains ◽  
Effective Thermal Properties

The thermal properties of the grinding wheel are required for energy partitioning in grinding. This paper describes an investigation of the effective thermal properties of alumina and cubic boron nitride (CBN) grinding wheels. Results are presented for a novel sensor that was designed to measure the bulk thermal properties of grinding wheel samples. The effective bulk thermal properties of the grinding wheel and the effective thermal properties of the abrasive grains were also investigated. It was found that the bulk thermal property is dominated by the properties of the bond and does not account for the improved thermal performance of CBN compared with alumina. Values of the effective thermal conductivities for alumina and CBN abrasive grains are therefore proposed. It is concluded that the effective thermal conductivity of the grains is best obtained inversely from grinding experiments.

Preparations and Properties of Solid Lubricants Coating on High-Speed Steel Tools

2008 ◽  
Vol 392-394 ◽  
pp. 538-542
Author(s):  
Suo Xia Hou ◽  
Xiao Ming Jia ◽  
C. Wu
Keyword(s):  
Surface Roughness ◽  
High Speed ◽  
Solid Lubricant ◽  
Testing Machine ◽  
High Speed Steel ◽  
Solid Lubricants ◽  
Solid Lubrication ◽  
Mixture Ratio ◽  
Solid Lubricant Coating ◽  
Cutting Test

This paper presents that the high-speed steel tools with solid lubrication material coating can cut without fluid because it has the quality of self-lubrication. With the help of M-2 friction and wearing testing machine and KYKY2800 scan electron microscope, the coating preparation technology and mixture ratio of solid lubrication material in complex coating can be optimized. The results show: phosphate treatment can increase the power of the tools’ surface adsorbing solid lubricant, and the frictional behaviour of solid lubrication coating is excellent when surface roughness of phosphate coating is Ra 2μm~Ra 4μm; molybdenum bisulfide, graphite and trioxid aluminium are mixed together and form a kind of complex coating which has better antifriction effect. The cutting test shows that the solid lubricant coating on the high-speed steel tools can be helpful in increasing the service life of the tools, decreasing the cutting resistance, and reducing the chip deformation and surface roughness of finished work.

Magnetic Field on Properties of Solid Lubricants Coating on High-Speed Steel Surface

2010 ◽  
Vol 148-149 ◽  
pp. 728-731
Author(s):  
Suo Xia Hou ◽  
Xiao Ming Jia ◽  
Chao Wu
Keyword(s):  
Magnetic Field ◽  
High Speed ◽  
Steel Surface ◽  
Solid Lubricant ◽  
Processing System ◽  
High Speed Steel ◽  
Solid Lubricants ◽  
Phosphate Solution ◽  
Solid Lubricant Coating ◽  
Lubricant Coating

The main factors that affect properties of solid lubricant coating on high-speed steel surface are the surface roughness and the weight of phosphate coating. The effect of magnetic field on high speed steel phosphate process is significant. It promotes the film and the different appearance and composition of the film. Because the ferric phosphate and dihydric phosphate in phosphate solution may be ordered arrangement by additional magnetic field, they can be deposited on metal surfaces quickly. That is to say that a certain intensity of the magnetic field can reduce the entropy of the phosphate processing system and speed up the formation of phosphate film. During phosphate treatment, the friction performance of high-speed steel coated with solid lubricant coating was significantly improved.

Optimizing the grinding of high-speed steel by wheels of cubic boron nitride

2007 ◽  
Vol 27 (12) ◽  
pp. 916-919 ◽  
Author(s):  
Ya. I. Soler ◽  
D. Yu. Kazimirov ◽  
A. V. Prokop’eva
Keyword(s):  
Boron Nitride ◽  
High Speed ◽  
Cubic Boron Nitride ◽  
High Speed Steel

Design of Flexible Grinding Wheel With Variable Hub Thickness

1994 ◽  
Vol 116 (2) ◽  
pp. 260-262 ◽  
Author(s):  
Z. M. Bzymek ◽  
G. Song ◽  
T. D. Howes ◽  
R. E. Garrett
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Boron Nitride ◽  
Variable Thickness ◽  
Cubic Boron Nitride ◽  
Grinding Wheel ◽  
The Finite Element Method ◽  
Grinding Wheels ◽  
Major Step ◽  
Element Method

In this paper, various Cubic Boron Nitride (CBN) grinding wheels designed to suppress chatter are statically and dynamically analyzed and compared by means of the Finite Element Method (FEM). As a result of these analyses, a flexible wheel with a variable thickness hub is proposed. Theoretically, the new wheel should suppress chatter and thus be a major step forward in grinding wheel design.

Increasing the effectiveness of deep grinding of the locking element of a turbine blade with an "Aerobor® II" highly porous cubic boron nitride grinding wheel

2021 ◽  
pp. 68-71
Author(s):  
Keyword(s):  
Boron Nitride ◽  
Turbine Blade ◽  
Nickel Alloys ◽  
Cubic Boron Nitride ◽  
Turbine Blades ◽  
Grinding Wheel ◽  
High Porosity ◽  
Grinding Wheels ◽  
New Generation ◽  
Highly Porous

The results of testing new generation Aerobor® II cubic boron nitride grinding wheels during machining of the locking element of turbine blades are presented. The advantages of using new high-porosity cubic boron nitride grinding wheels in comparison with abrasive grinding wheels in deep grinding of parts made of heat-resistant nickel alloys are described. Keywords: deep grinding, turbine blade, locking element, high-temperature nickel alloys, high-porosity cubic boron nitride grinding wheel [email protected], [email protected], [email protected]

An Experimental Evaluation of Solid Lubricant Based Nanofluids in Small Quantity Cooling and Lubrication during Grinding

2017 ◽  
Vol 890 ◽  
pp. 98-102 ◽  
Author(s):  
Sourabh Paul ◽  
Amitava Ghosh
Keyword(s):  
Boron Nitride ◽  
Solid Lubricant ◽  
Hexagonal Boron Nitride ◽  
Solid Lubricants ◽  
Metallic Alloys ◽  
Grinding Wheel ◽  
Metal Working ◽  
Maximum Reduction ◽  
Cooling And Lubrication ◽  
Ball On Disc

Small quantity cooling lubrication (SQCL) with commercially available metal working fluids (MWF) and nanofluids has been attempted successfully in machining and grinding. Solid lubricants also provided some benefits in grinding of metallic alloys. However, there are very few studies using molybdenum di-sulphide (MoS2) and hexagonal boron nitride (hBN) dispersed nanofluids applied in SQCL mode in grinding. The aim of the present work is to experimentally study improvement in grinding of EN31 steel using alumina grinding wheel with aqueous MoS2 and hBN nanofluids. The grinding study is supported by detailed tribometry at 1 m/s sliding speed to reveal the possible reasons behind such improvement. MoS2 dispersed nanofluids provided minimum coefficient of friction in ball-on-disc test. It also provided the maximum reduction in specific grinding energy and improvement in surface finish with respect to flood cooling. hBN dispersed nanofluids could not match the performance of MoS2 dispersed nanofluids both in ball-on-disc and grinding experiments.

scholarly journals Transfer of Cubic Boron Nitride Grinding Wheel Wear Products to the Nickel Alloy Surface

2020 ◽  
Vol 329 ◽  
pp. 03050
Author(s):  
Vladimir A. Nosenko ◽  
Aleksandr V. Fetisov ◽  
Semen P. Kuznesov
Keyword(s):  
Chemical Composition ◽  
Boron Nitride ◽  
Nickel Alloy ◽  
Cubic Boron Nitride ◽  
Alloy Surface ◽  
Spectral Studies ◽  
Grinding Wheel ◽  
X Ray ◽  
Ceramic Bond ◽  
Wear Products

The article summarizes the results of microscopic and x-ray spectral studies of objects embedded in the surface layer of a nickel alloy after grinding with a wheel of cubic boron nitride (CBN) on a ceramic bond. In the introduction, the authors analyzes the results of research on the use of CBN as an abrasive material. Unlike silicon carbide wheels, CBN tools are a more complex and multi-component structure, which has a significant impact on the self-sharpening of the abrasive tool and the transfer of material. The purpose of this article is to detect and identify the wear products of a CBN grinding wheel on the treated surface of a nickel alloy. As a result of studying the morphology of the alloy surface after grinding with CBN wheels, foreign objects embedded in the metal were detected with a scanning two-beam electron microscope. The chemical composition of the objects was studied by x-ray spectral microanalysis. Based on the obtained spectrograms, the objects were divided into three groups, including peaks of x-ray characteristic radiation: boron and nitrogen characteristic of CBN grains; aluminum and oxygen characteristic of corundum; oxygen, silicon, aluminum, and some elements characteristic of a ceramic bond. Tables of the chemical composition of the studied objects are provided. Conclusions. The transfer of CBN grinding whee wear products from to the treated surface is experimentally proved.

scholarly journals MORPHOLOGY AND CHEMICAL COMPOSITION OF THE SURFACE OF STEEL 10895 AT THE INITIAL STAGE OF GRINDING WITH A WHEEL MADE OF CUBIC BORON NITRIDE

2020 ◽  
pp. 42-45
Author(s):  
V. Nosenko ◽  
A. Fetisov ◽  
S. Kuznetsov
Keyword(s):  
Chemical Composition ◽  
Boron Nitride ◽  
Cubic Boron Nitride ◽  
Grinding Wheel ◽  
Adhesive Interaction ◽  
Initial Stage ◽  
Processed Material ◽  
Ceramic Bond ◽  
Wear Products ◽  
Material Wear

The results of the study of the morphology and chemical composition of the surface of 10895 electrical steel obtained during the first period of grinding with a wheel made of cubic boron nitride on a ceramic bond are presented. It is shown that in comparison with grinding in the same conditions of titanium alloy, the intensity of the adhesive interaction of the abrasive tool with the processed material is significantly less. Despite a significant decrease in the intensity of adhesive interaction with the abrasive material, wear products of the grinding wheel were found on the treated surface of the steel. The results of morphological and electron microprobe analyses allow to identify the products of wear, as the crystals of cubic boron nitride.

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