A study on the vibrations in the external cylindrical grinding process of the alloy steels

2020 ◽  
Vol 34 (22n24) ◽  
pp. 2040150 ◽  
Author(s):  
Tuan-Linh Nguyen ◽  
Nhu-Tung Nguyen ◽  
Long Hoang
Keyword(s):  
Grinding Process ◽  
Cooling Mode ◽  
Workpiece Material ◽  
Cylindrical Grinding ◽  
Technology System ◽  
Machining Conditions ◽  
Material Hardness ◽  
Alloy Steels ◽  
External Cylindrical Grinding

The vibration during external cylindrical grinding is caused by many factors such as the rigidity of the technology system, machining modes, machining materials, cooling mode, etc. This paper employed a Taguchi method to design experiments and evaluate the influence of machining mode parameters and workpiece material hardness on the vibrations when machining some types of alloy steel in external cylindrical grinding process. The influence of machining conditions on the vibrations was investigated. Besides, the mathematical models of vibration amplitudes were also modeled. The achieved results can be used to control the vibrations through machining conditions to improve the surface quality of the product.

scholarly journals Modeling of external cylindrical grinding process using T1 tool steel

2021 ◽  
pp. 85-98
Author(s):  
Tuan-Linh Nguyen
Keyword(s):  
Surface Roughness ◽  
Material Removal ◽  
Removal Rate ◽  
Cutting Parameters ◽  
Grinding Process ◽  
Cylindrical Grinding ◽  
Grinding Conditions ◽  
Optimal Values ◽  
External Cylindrical Grinding

The selection of the optimal external cylindrical grinding conditions importantly contributes to increase of productivity and quality of the products. The external cylindrical grinding is a method of finishing machine elements surface with an indeterminate blade shape. External cylindrical grinding can process surfaces that require high gloss and precision, although it can also be used to remove large surplus stock. Therefore, multi objective optimization for the external cylindrical grinding process is a problem with high complexity. In this study, an experimental study was performed to improve the productivity and quality of grinding process. By using the experimental date, the surface roughness, cutting force, and vibrations were modeled. To achieve the minimum value of surface roughness and maximum value of material removal rate, the optimal values of external cylindrical grinding conditions were determined by using the combination of Genetic Algorithms (GAs) and weighting method. The optimum values of surface roughness and material removal rate are 0.510 μm and 5.906 mm2/s, respectively. The obtained optimal values of cutting parameters were a feed rate of 0.3 mm/rev, a workpiece speed of 188.1 rpm, a cutting depth of 0.015 mm, and a workpiece Rockwell hardness of 54.78 HRC. The optimal values of cutting parameters, and workpiece hardness were successfully verified by comparing of experimental and predicted results. The approach method of this study can be applied in industrial machining to improve the productivity and quality of the products in external cylindrical grinding process of the T1 tool steel

A Study on Determination of Optimum Parameters for Lubrication in External Cylindrical Grinding Base on Taguchi Method

2019 ◽  
Vol 796 ◽  
pp. 97-102 ◽  
Author(s):  
Hoang Xuan Tu ◽  
Vu Ngoc Pi ◽  
Gong Jun
Keyword(s):  
Surface Roughness ◽  
Taguchi Method ◽  
Grinding Wheel ◽  
Grinding Process ◽  
Taguchi Technique ◽  
Workpiece Material ◽  
Optimum Parameters ◽  
Set Up ◽  
External Cylindrical Grinding

This paper presents a study on determining optimum parameters for lubrication in external grinding process. In the study, experiments were designed by using Taguchi technique. The experiments were set up with Oemeta Unimet AS 192 lubricant, Al2O3 grinding wheel and the workpiece material of tool steel 9CrSi. From the results of the experiments, the influences of coolant parameters on the surface roughness were analyzed. It was found that the concentration of lubricant was the most impact, the second is flow rate and the coolant pressure has little impact on the surface roughness. Also, the optimum parameters of lubrication for getting minimum surface roughness were proposed.

scholarly journals Impact of metal removal features in the reverse zones on shaping of the machined surface in the process of cylindrical grinding with traverse feed

2018 ◽  
Vol 224 ◽  
pp. 01034
Author(s):  
Pavel Pereverzev ◽  
Aleksandra Akintseva ◽  
Masar Alsigar
Keyword(s):  
Formation Process ◽  
Metal Removal ◽  
Numerical Control ◽  
Grinding Process ◽  
Technological Parameters ◽  
Machined Surface ◽  
Surface Formation ◽  
Cylindrical Grinding ◽  
External Cylindrical Grinding ◽  
Control Machine

This paper presents a model of the formation process of surface zones of external cylindrical grinding with traverse feed at a computer numerical control machine (CNC). This article, have investigated modelling features of the grinding process in reverse zones. On the basis of the model of grinding surface formation a detailed step by step calculations of the current values of the actual radial feed and radius dimension in different areas of a treated surface is presented. The model allows maintaining calculations with presence of the initial radial runout of the workpiece for estimated automatic cycle of radial and axial feeds changing and other technological parameters.

A Study on Cost Optimization of External Cylindrical Grinding

2020 ◽  
Vol 977 ◽  
pp. 18-26
Author(s):  
Thi Hong Tran ◽  
Xuan Tu Hoang ◽  
Hong Ky Le ◽  
Quoc Tuan Nguyen ◽  
Thanh Tu Nguyen ◽  
...  
Keyword(s):  
Cost Optimization ◽  
Grinding Wheel ◽  
Grinding Process ◽  
Wheel Wear ◽  
Cylindrical Grinding ◽  
Screening Experiments ◽  
Grinding Parameters ◽  
Hourly Rate ◽  
Proposed Model ◽  
External Cylindrical Grinding

Grinding cost is an essential factor in a grinding process. In external cylindrical grinding, there has been an absence of various input grinding process parameters which have significant effects on the grinding cost. This paper presents an optimization of the grinding cost to determine the optimum exchanged grinding wheel diameter based on the seven input grinding parameters consisting of the initial grinding wheel diameter, the grinding wheel width, the wheel life, the radial grinding wheel wear per dress, the total depth of dressing cut, the machine tool hourly rate, and the grinding wheel cost. Combined with the screening experiments, the influence of the grinding parameters on the optimum exchanged grinding wheel diameter for the external cylindrical grinding process was examined. In addition, the effect of the interactions between the input grinding parameters was also evaluated. Finally, the regression equation for computing the optimum exchanged grinding wheel diameter was introduced. Therefore, the proposed model can be further applied for the external grinding process effectively.

Cost Optimization of External Cylindrical Grinding

2013 ◽  
Vol 312 ◽  
pp. 982-989 ◽  
Author(s):  
Vu Ngoc Pi ◽  
Phan Quang The ◽  
Vu Hong Khiem ◽  
Nguyen Ngoc Huong
Keyword(s):  
Cost Optimization ◽  
Grinding Wheel ◽  
Grinding Process ◽  
Overhead Cost ◽  
Cylindrical Grinding ◽  
Optimum Diameter ◽  
Machine Cost ◽  
External Cylindrical Grinding ◽  
Grinding Time ◽  
Cost Components

This paper introduces a study on cost optimization of external cylindrical grinding. The effects of many grinding process parameters such as the initial grinding wheel diameter, the wheel life, the total dressing depth as well as the effect of cost components including the machine cost, the labor including overhead cost, the grinding wheel cost and so forth were taken into account. A model for calculation the optimum exchanged grinding wheel diameter was proposed. With this optimum diameter, a new and effective way of using the grinding wheel was proposed and both the grinding cost and grinding time can be reduced considerably.

A New Analytical Model of Heat Flux Distribution to Compute Residual Stresses in the Case of External Cylindrical Grinding Process

2012 ◽  
Vol 445 ◽  
pp. 125-130 ◽  
Author(s):  
Haifa Sallem ◽  
Hédi Hamdi
Keyword(s):  
Heat Flux ◽  
Residual Stresses ◽  
Metal Cutting ◽  
Grinding Wheel ◽  
Grinding Process ◽  
Near Surface ◽  
Workpiece Surface ◽  
Cylindrical Grinding ◽  
Cutting Processes ◽  
External Cylindrical Grinding

Grinding process is an energy intensive process in the sense that, it requires a larger amount of energy per unit of volume of material removal compared to other metal cutting processes. In this case, effects on the ground workpiece in terms of induced residual stresses and metallurgical changes due to heat generated play an important role on the lifetime of parts in their mechanism. In order to investigate effects on the workpiece during external cylindrical grinding process, a new analytical approach is firstly developed to model the action of the grinding wheel as a heat flux, which moves along the workpiece surface. The value and the shape of the heat flux entering the workpiece are directly identified. Based on the established model, numerical simulations are performed to predict temperature, cooling and its effects on residual stress distribution in the ground near surface.

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