Investigations on Laser Dressing of Grinding Wheels—Part I: Preliminary Study

1989 ◽  
Vol 111 (3) ◽  
pp. 244-252 ◽  
Author(s):  
N. Ramesh Babu ◽  
V. Radhakrishnan ◽  
Y. V. G. S. Murti
Keyword(s):  
Mechanical Properties ◽  
Laser Pulses ◽  
Grinding Wheel ◽  
Thermal And Mechanical Properties ◽  
Grinding Wheels ◽  
Wheel Surface ◽  
Laser Dressing ◽  
Dressing Tool ◽  
Vitrified Bond ◽  
Preliminary Study

Investigations on the use of laser as a dressing tool for grinding wheels have been carried out and the results are reported in a two paper sequence. This paper reports the results of preliminary investigations on grinding wheel materials after laser irradiation. Studies were carried out on the surfaces of aluminum oxide (Al2O3), and silicon carbide (SiC) grains, vitrified bond and also on a sample Al2O3 grinding wheel after irradiating them with high intensity Nd:YAG laser pulses. The results obtained are discussed with reference to the optical, thermal, and mechanical properties of the materials. This paper also includes the studies on the wheel surface topography obtained after laser dressing the wheel with different dressing feed rates.

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.

Investigations on Laser Dressing of Grinding Wheels—Part II: Grinding Performance of a Laser Dressed Aluminum Oxide Wheel

1989 ◽  
Vol 111 (3) ◽  
pp. 253-261 ◽  
Author(s):  
N. Ramesh Babu ◽  
V. Radhakrishnan
Keyword(s):  
Laser Radiation ◽  
Aluminum Oxide ◽  
High Intensity ◽  
Grinding Wheel ◽  
Grinding Wheels ◽  
Dry Cutting ◽  
Yag Laser ◽  
Laser Dressing ◽  
Preliminary Study ◽  
Set Up

Based on the results of the preliminary study on the influence of high intensity Nd: YAG laser radiation on grinding wheel constituents, an experimental set-up for dressing a grinding wheel was made. Studies were carried out to evaluate the performance of a laser dressed Al2O3 wheel in surface grinding under dry cutting conditions. Results confirmed the viability of this approach and indicated the existence of an optimal dressing condition for good results.

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.

Reducing Wear of Abrasive Wheels Grinding Aerospace Alloys by Laser Assisted Cleaning

2005 ◽  
Author(s):  
Mark J. Jackson ◽  
Xun Chen
Keyword(s):  
Laser Power ◽  
Laser Cleaning ◽  
Grinding Wheel ◽  
Cleaning Process ◽  
Grinding Wheels ◽  
Wheel Surface ◽  
Power Flux ◽  
Aerospace Alloys ◽  
High Laser ◽  
Selection Of

A new method for cleaning loaded grinding wheels is introduced by applying a CO2 laser pulse to the wheel surface. It is shown that effective cleaning can be achieved by the selection of adequate laser power flux and irradiation duration. Fusion and evaporation of clogged chips play an important role in the laser cleaning process and subsequent wear of the grinding wheel. It is suggested that high laser power irradiance of short duration is essential for effective wheel cleaning and reduced wear of the grinding wheel with specially developed bonds.

Conditioning of Vitrified Bond CBN Grinding Wheels Using a Picosecond Laser

2014 ◽  
Vol 1017 ◽  
pp. 573-579 ◽  
Author(s):  
Ali Zahedi ◽  
Taghi Tawakoli ◽  
Javad Akbari ◽  
Bahman Azarhoushang
Keyword(s):  
Laser Radiation ◽  
Thermal Effects ◽  
Laser Scanner ◽  
Picosecond Laser ◽  
Grinding Wheel ◽  
Material Degradation ◽  
Wheel Surface ◽  
Selective Ablation ◽  
Vitrified Bond ◽  
Threshold Process

Laser ablation is a novel non-mechanical wheel preparation method for optimizing the treatment costs of superabrasive tools. In this study the thermal effects of picosecond laser radiation on CBN superabrasive grinding wheel surface is analytically and experimentally investigated. The analytical approach is intended to find threshold process parameters for selective ablation of cutting grains and bond material. It has been analytically and experimentally shown that, the extent of material degradation is defined by the maximum surface temperature induced by the laser radiation which is in turn defined by the laser beam energy. It is also suggested that, the depth of laser thermal effects is governed by the relative speed of the laser scanner with respect to the wheel surface.

scholarly journals Process Related Characteristic-Based Topography Evaluation of Wear Conditions On Grinding Wheels

2021 ◽  
Author(s):  
Maikel Strug ◽  
Berend Denkena ◽  
Bernd Breidenstein ◽  
Alexander Krödel-Worbes
Keyword(s):  
Evaluation Method ◽  
Process Efficiency ◽  
Grinding Wheel ◽  
The Novel ◽  
Grinding Wheels ◽  
Dressing Tool ◽  
Grinding Tool ◽  
Grinding Machine ◽  
Related Characteristic ◽  
Milling Tools

Abstract Non-productive auxiliary processes affect the single part and small badge production of milling tools. The key production process grinding is inevitably linked to the auxiliary conditioning process. The time demand of those process steps decreases the overall productivity of the manufacturing process. However, today the machine operator decides on conditioning cycles individually by the use of experience. Until today, there is no objective data based approach available that supports the initiation of these conditioning processes or the adaption of the grinding process itself in order to improve its process efficiency. For this purpose, a process related topography evaluation method of the grinding wheel surface is developed within this study. For the measurement an optical method based on laser triangulation is used. The measurement system is implemented into a common tool grinding machine tool. In addition, characteristic topography values are defined that show the wear conditions of the grinding tool. Moreover, the data is summarized in a database of wear conditions. The developed measurement method can save grinding and dressing tool resources, process times and minimizes scrap parts. In addition, an adaptation of the process and a targeted launch of auxiliary processes can be enabled. The novel characteristic-based topography measurement creates the opportunity to enhance the tool life of the grinding wheels up to 30 % without losing productivity.

Grinding Wheel Loading Evaluation Using Digital Image Processing

2013 ◽  
Vol 136 (1) ◽  
Author(s):  
Hamed Adibi ◽  
S. M. Rezaei ◽  
Ahmed A. D. Sarhan
Keyword(s):  
Image Processing ◽  
Digital Image Processing ◽  
Digital Image ◽  
Cutting Parameters ◽  
Grinding Wheel ◽  
Grinding Wheels ◽  
Wheel Surface ◽  
Metal Chips ◽  
Wheel Loading ◽  
Expensive Process

Wheel loading entails chip accumulation in porosities between grains or welding to the top of cutting grains. It is considered one of the most prevalent problems in grinding Nickel-based super alloys. Identification of wheel loading is an important issue for optimizing the dressing intervals, but it can be a time consuming and an expensive process. A novel technique based on digital image processing to determine the loading areas over the surface of CBN vitrified grinding wheels using the toolbox of MATLAB is presented in this paper. The optical characteristics of the metal chips, the abrasive grains and wheel bond are considered. Experiments were performed to examine the repeatability of the proposed technique. The results were verified by the use of a scanning electron microscope. Based on the proposed technique, the effects of cutting parameters on the loaded area to wheel surface ratio in relation to grinding performance were studied empirically.

Investigation of Laser Dressed Super Abrasive Grinding Wheel by Using SEM & Raman Spectroscopy

2014 ◽  
Vol 592-594 ◽  
pp. 432-437
Author(s):  
R. Deepak Joel Johnson ◽  
G. Ugrasen
Keyword(s):  
Residual Stress ◽  
Experimental Study ◽  
Raman Spectroscopy ◽  
Residual Stress Distribution ◽  
Grinding Wheel ◽  
Wheel Surface ◽  
Abrasive Wheel ◽  
Laser Dressing ◽  
Before And After ◽  
Scanning Electron

In this present work, Investigation was carried on the surface of laser dressed super abrasive grinding wheel to study the topography of the super abrasive wheel surface, the residual stress distribution on the laser dressed surface of the wheel and to analyse the heat affected zone of the wheel surface. To investigate all this terms the experimental study of Scanning Electron Microscope and Raman Spectroscopy on the laser dressed wheel surface were done and objective of this work is also to show the effectiveness of laser dressing by measuring the surface roughness of the workpiece before and after laser dressing operation.

scholarly journals Methods for modeling the active surface of grinding wheels

Mechanik ◽  
2018 ◽  
Vol 91 (10) ◽  
pp. 907-914 ◽  
Author(s):  
Wojciech Kacalak ◽  
Filip Szafraniec ◽  
Dariusz Lipiński
Keyword(s):  
Probability Density Function ◽  
Probability Density ◽  
Density Function ◽  
Active Surface ◽  
Grinding Wheel ◽  
Real Surface ◽  
Grinding Wheels ◽  
Wheel Surface ◽  
The Real

This paper many different methods of generating the topography of the grinding wheel surface and the methodology for assessing the compatibility of models with the surface of real tools was presented. The methodology was indicated that certain features regarding the shape and position of the highest vertices are decisive for assessing the model’s conformity with the real surface of the grinding wheel. The significance of not only the form of the distribution of the vertices of the grains was emphasized, but also the significance of the fragment of the probability density function relating to the highest vertices and the autocorrelation of the vertex position as the most important feature, which often are overlooked in the models described in the literature.

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