Experiment Research on Grinding of Optical Glass with Indigenously Developed Monolayer Brazed Diamond Grinding Wheel

2010 ◽  
Vol 136 ◽  
pp. 279-283 ◽  
Author(s):  
Bei Zhang ◽  
Hong Jun Xu ◽  
Yu Can Fu ◽  
Hong Hua Su
Keyword(s):  
Optical Glass ◽  
Removal Rate ◽  
Ground Surface ◽  
Grinding Wheel ◽  
Grinding Process ◽  
Diamond Grinding Wheel ◽  
Diamond Grinding ◽  
Short Service Life ◽  
Wheel Topography ◽  
Grinding Wheel Topography

Conventional grinding of optical glass will normally result in not only much lower material removal rate but also short service life of grinding tools, which causes the high fabrication cost of optical glass. This paper focuses on the precision grinding of optical glass with the indigenously developed monolayer brazed diamond grinding wheel. Before grinding process a precision dressing is conduct. The dressed grinding wheel topography is observed. Through precision dressing the grinding process achieves moderate surface finish as well as ensures certain grinding efficiency. The ground surface of the optical glass workpiece is made up of micro-pits and glazing zones and the obtained surface roughness variation with the process parameters is analyzed. The experiment shows that the developed diamond grinding wheel is suitable to the application of optical glass machining.

Experimental Study on Performance of Monolayer Brazed Diamond Wheel through Chemical-Mechanical Dressing

2011 ◽  
Vol 325 ◽  
pp. 208-212 ◽  
Author(s):  
Hong Hua Su ◽  
Jiu Hua Xu ◽  
Yu Can Fu ◽  
Wen Feng Ding ◽  
Shuai Wang
Keyword(s):  
Optical Glass ◽  
Ground Surface ◽  
Diamond Wheel ◽  
Substantial Improvement ◽  
Grinding Wheel ◽  
Dressing Method ◽  
Diamond Grinding Wheel ◽  
Diamond Grinding ◽  
Before And After ◽  
Ground Surface Roughness

The dressing methods of monolayer diamond tool have recently been developed increasingly because a substantial improvement of the ground surface roughness could be achieved with the dressed monolayer diamond tools. In this paper, a new dressing method was proposed, namely chemical-mechanical dressing of the diamond grits. Dressing experiments were carried out on the monolayer brazed diamond grinding wheel. The grit-tip distances from the base of wheel substrate were measured before and after dressing. Grinding experiments were conducted on K9 optical glass after each dressing interval. The roughness parameters of the ground surfaces were measured. The outcome of this attempt appeared highly encouraging, and the dressing of monolayer brazed diamond grinding wheel is effective with the chemical-mechanical dressing.

The application of 3D-motif analysis to characterize diamond grinding wheel topography

Measurement ◽  
2016 ◽  
Vol 77 ◽  
pp. 73-79 ◽  
Author(s):  
Ruifang Ye ◽  
Xiangqian Jiang ◽  
Liam Blunt ◽  
Changcai Cui ◽  
Qing Yu
Keyword(s):  
Grinding Wheel ◽  
Motif Analysis ◽  
Diamond Grinding Wheel ◽  
Diamond Grinding ◽  
Wheel Topography ◽  
Grinding Wheel Topography

Einfluss der Abrichtgrößen beim Schleifen*/Influence of dressing parameters on the grinding process - Systematic research of dressing parameters on workpiece roughness and surface integrity

2016 ◽  
Vol 106 (01-02) ◽  
pp. 44-50
Author(s):  
T. Lierse ◽  
B. Karpuschewski ◽  
T. R. Kaul
Keyword(s):  
Aluminum Oxide ◽  
Surface Integrity ◽  
Cvd Diamond ◽  
Grinding Wheel ◽  
Systematic Research ◽  
Grinding Process ◽  
Wheel Topography ◽  
Grinding Wheel Topography

Dieser Beitrag zeigt, dass die durch die Abrichtparameter erzeugte Schleifscheibentopographie nicht nur die Oberflächengüte des Werkstücks, sondern auch dessen Eigenspannungszustand in der Werkstückrandzone in weiten Grenzen verändert. Die Untersuchungen zum Abrichten von Korundschleifscheiben mit einer CVD-Diamantformrolle stellen den Zusammenhang zwischen dem Abrichten unterschiedlicher Schleifscheiben zur Bauteilqualität in Form der Oberflächenrautiefe und randzonennahen Eigenspannungen her.   The quality of the workpiece rim is changed by every grinding process. The grinding wheel topography created by the dressing process has not only influence on the workpiece roughness but also on the surface integrity. The pointed research using aluminum oxide abrasive wheels dressed by CVD diamond dressing discs shows a correlation between the dressing parameters, the workpiece roughness and the surface integrity.

Quantitative Beschreibung der Schleifscheibentopographie*/Quantitative description of the grinding wheel topography. Application-oriented characterization of the grinding wheel topography based on quantitative parameters

2018 ◽  
Vol 108 (06) ◽  
pp. 441-447
Author(s):  
S. Barth ◽  
J. Röttger ◽  
D. Trauth ◽  
P. Mattfeld ◽  
T. Bergs ◽  
...  
Keyword(s):  
Mechanical Load ◽  
Quantitative Description ◽  
Grinding Wheel ◽  
Grinding Process ◽  
Surface Zone ◽  
Quantitative Parameters ◽  
Wheel Topography ◽  
Grinding Wheel Topography ◽  
Lack Of Knowledge

In der Schleiftechnik besteht ein erhebliches Wissensdefizit über den Einfluss der Schleifscheibentopographie auf das Schleifprozessverhalten und die Ausbildung der Bauteilrandzoneneigenschaften. Ziel der Untersuchungen war daher die Identifikation und Analyse quantitativer Kenngrößen zur Beschreibung der geometrischen Schleifscheibentopographieeigenschaften. Diese Kenngrößen ermöglichten fortführend die Modellierung des thermo-mechanischen Belastungskollektivs im Schleifprozess in Abhängigkeit von der Schleifscheibentopographie.   In grinding technology, there is a considerable lack of knowledge about the influence of the grinding wheel topography on the process behaviour and the formation of the component surface zone properties. Therefore, the aim of the investigations was to investigate quantitative parameters for the description of the geometrical topography properties. These parameters enable to model the thermo-mechanical load collective in the grinding process as a function of the grinding wheel topography.

COMPARISON OF EXPERIMENTALLY MEASURED AND SIMULATED WORKPIECE AND GRINDING WHEEL TOPOGRAPHY USING A NEW DRESSING MODEL

2016 ◽  
Vol 40 (1) ◽  
pp. 1-17 ◽  
Author(s):  
Abdalslam Darafon ◽  
Andrew Warkentin ◽  
Robert Bauer
Keyword(s):  
Surface Finish ◽  
Metal Removal ◽  
Ground Surface ◽  
Cutting Edge ◽  
Edge Density ◽  
Grinding Wheel ◽  
Workpiece Surface ◽  
Wheel Topography ◽  
Grinding Wheel Topography ◽  
Grinding Conditions

This paper presents a new empirical model of the dressing process in grinding which is then incorporated into a 3D metal removal computer simulator to numerically predict the ground surface of a workpiece as well as the dressed surface of the grinding wheel. The proposed model superimposes a ductile cutting dressing model with a grain fracture model to numerically generate the resulting grinding wheel topography and workpiece surface. Grinding experiments were carried out using “fine”, “medium” and “coarse” dressing conditions to validate both the predicted wheel topography as well as the workpiece surface finish. For the grinding conditions used in this research, it was observed that the proposed dressing model is able to accurately predict the resulting workpiece surface finish for all dressing conditions tested. Furthermore, similar trends were observed between the predicted and experimentally-measured grinding wheel topographies when plotting the cutting edge density, average cutting edge width and average cutting edge spacing as a function of depth for all dressing conditions tested.

scholarly journals Effects of the Grinding Wheel Eccentricity and Waviness on the Dynamics of Tool Grinding

2017 ◽  
Vol 869 ◽  
pp. 128-138
Author(s):  
Kristin M. de Payrebrune ◽  
Matthias Kröger
Keyword(s):  
System Dynamics ◽  
Complex Dynamics ◽  
Grinding Wheel ◽  
Process Conditions ◽  
Grinding Process ◽  
Integrated Simulation ◽  
Wheel Topography ◽  
Grinding Wheel Topography ◽  
Excitation Frequencies ◽  
Tool Grinding

The complex dynamics of grinding repeatedly cause critical or unstable process conditions. For a better understanding and prediction of such occurrences, the dominant excitation phenomena need to be identified and their interrelation with the system dynamics have to be analyzed.Based on measurements of the excited frequencies in several operation modes of the grinding machine, the grinding wheel rotation is identified as a major excitation source. Further analysis of the grinding wheel surface displays three main components that define the excitation frequencies of the system; these are the eccentricity, waviness and roughness (also named wheel topography). Moreover, the wheel topography and thus the excitation frequencies can change over time due to excessive wear.Following the experimental results, a grinding wheel topography and wear model are developed and included in an integrated simulation of tool grinding. The analysis of the calculated cutting forces in the frequency domain confirm the excitation due to the grinding wheel topography.Firstly, this work has extracted the grinding wheel as a prominent excitation mechanism and reproduced it with the developed grinding model. Secondly, we have evidence that a complete description of the complex grinding process is only possible when considering the interdependence between system dynamics, wheel kinematics and the grinding process.

Modeling of the Grinding Wheel Topography Depending on the Recipe-Dependent Volumetric Composition

2017 ◽  
Vol 140 (2) ◽  
Author(s):  
Sebastian Barth ◽  
Michael Rom ◽  
Christian Wrobel ◽  
Fritz Klocke
Keyword(s):  
Research Work ◽  
Distribution Functions ◽  
Grinding Wheel ◽  
Grinding Process ◽  
Grinding Wheels ◽  
Edge Zone ◽  
Application Behavior ◽  
Wheel Topography ◽  
Grinding Wheel Topography ◽  
Grinding Tool

The prediction of the grinding process result, such as the workpiece surface quality or the state of the edge zone depending on the used grinding wheel is still a great challenge for today's manufacturers and users of grinding tools. This is mainly caused by an inadequate predictability of force and temperature affecting the process. The force and the temperature strongly depend on the topography of the grinding wheel, which comes into contact with the workpiece during the grinding process. The topography of a grinding wheel mainly depends on the structure of the grinding wheel, which is determined by the recipe-dependent volumetric composition of the tool. So, the structure of a grinding tool determines its application behavior strongly. As result, the knowledge-based prediction of the grinding wheel topography and its influence on the machining behavior will only be possible if the recipe-dependent grinding wheel structure is known. This paper presents an innovative approach for modeling the grinding wheel structure and the resultant grinding wheel topography. The overall objective of the underlying research work was to create a mathematical-generic grinding tool model in which the spatial arrangement of the components, grains, bond, and pores, is simulated in a realistic manner starting from the recipe-dependent volumetric composition of a grinding wheel. This model enables the user to determine the resulting grinding wheel structure and the grinding wheel topography of vitrified and synthetic resin-bonded cubic boron nitride (CBN) grinding wheels depending on their specification and thus to predict their application behavior. The originality of the present research results is a generic approach for the modeling of grinding tools, which takes into account the entire grinding wheel structure to build up the topography. Therefore, original mathematical methods are used. The components of grinding wheels are analyzed, and distribution functions of the component's positions in the tools are determined. Thus, the statistical character of the grinding wheel structure is taken into account in the developed model. In future, the presented model opens new perspectives in order to optimize and to increase the productivity of grinding processes.

Kornbruchverhalten beim Abrichten von CBN/Fracture behavior of CBN during dressing – Analysis of the single grain dressing process of CBN

2021 ◽  
Vol 111 (06) ◽  
pp. 408-413
Author(s):  
Marius Ohlert ◽  
Sebastian Prinz ◽  
Sebastian Barth ◽  
Thomas Bergs
Keyword(s):  
Fracture Behavior ◽  
Grinding Wheel ◽  
Grinding Process ◽  
Wheel Topography ◽  
Grinding Wheel Topography ◽  
Single Grain

Die Schleifscheibentopographie, welche durch den Abrichtprozess erzeugt wird, ist ein wesentlicher Einflussfaktor für das Prozessergebnis beim Schleifen. Das Bruchverhalten der Kornwerkstoffe beim Abrichten hängt nicht nur von den Abrichtparametern, sondern auch von dem Korntyp der Schleifscheibe ab. Daher wurden Abrichtversuche an einzelnen CBN-Körnern durchgeführt, um den Einfluss der Abrichtparameter und des Korntyps auf das Prozessergebnis zu ermitteln.   The grinding wheel topography generated by the dressing process is a factor of major impact on the result of the grinding process. The fracture behavior of the grains of the grinding wheel during dressing not only depends on the dressing parameters but also on the grain type of the grinding wheel. Therefore, dressing tests of single CBN grains were conducted to determine how the dressing parameters and the grain type influence the process result.

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