Experimental Study on Surface Finishing Performances in Quick-Point Grinding

2007 ◽  
Vol 24-25 ◽  
pp. 97-102 ◽  
Author(s):  
Shi Chao Xiu ◽  
Chang He Li ◽  
Guang Qi Cai
Keyword(s):  
Surface Roughness ◽  
Feeding Rate ◽  
Point Contact ◽  
Surface Finishing ◽  
Depth Of Cut ◽  
Grinding Wheel ◽  
Grinding Process ◽  
Cylindrical Grinding ◽  
Axial Feeding ◽  
Grinding Speed

There are lower grinding force and temperature in quick-point grinding process because of the higher grinding speed and the less depth of cut, especially the point contact between the grinding wheel and the workpiece due to the point grinding angles. Thus it can achieve better surface finishing process in grinding cylindrical surface. Since the point grinding model is different from the conventional cylindrical grinding in theory, the surface roughness is in relation to the point-grinding angles greatly besides the grain granularity, depth of cut, grinding speed and axial feeding rate like the conventional cylindrical grinding process. Based on the theoretical studies on the surface roughness in the process, the surface finishing experiments and measures at the various grinding parameters were performed. The experimental results show that the process parameters, such as point-grinding angles, depth of cut, grinding speed and axial feeding rate, must be controlled reasonably for the higher surface finishing demand in quick-point grinding process.

Study on Effects of Grinding Speed on Finish and Precision Machining in Quick-Point Grinding

2007 ◽  
Vol 364-366 ◽  
pp. 696-700
Author(s):  
Shi Chao Xiu ◽  
Suo Xian Yuan ◽  
Chang He Li ◽  
Guang Qi Cai
Keyword(s):  
Surface Roughness ◽  
Point Contact ◽  
Ground Surface ◽  
Precision Machining ◽  
Depth Of Cut ◽  
Grinding Wheel ◽  
Workpiece Surface ◽  
Influencing Mechanism ◽  
Grinding Speed ◽  
Ground Surface Roughness

According to the analysis in theory, the model of quick-point grinding is different from conventional cylindrical grinding because it is point contact between the grinding wheel and the workpiece due to the point-grinding angles in two directions and the lower grain depth of cut in the process. Especially, the grinding speed has the great effects on the micro-geometry properties and the machining precision of the workpiece surface in the process. Based on the theoretical studies on the surface roughness, the grinding experiments and the measurements of the surface roughness at high grinding speeds were performed in quick-point grinding process. Furthermore, the influencing mechanism of the grinding speed on the ground surface roughness was analyzed. Some conclusions of the grinding parameters influencing precision machining and surface integrity were deduced.

Study on Edge Contact Area and Surface Integrity of Workpiece in Point Grinding Process

2009 ◽  
Vol 407-408 ◽  
pp. 577-581
Author(s):  
Shi Chao Xiu ◽  
Zhi Jie Geng ◽  
Guang Qi Cai
Keyword(s):  
Surface Integrity ◽  
Contact Area ◽  
High Speed ◽  
Ground Surface ◽  
Depth Of Cut ◽  
Grinding Wheel ◽  
Grinding Process ◽  
Edge Contact ◽  
Cylindrical Grinding ◽  
Theoretic Foundations

During cylindrical grinding process, the geometric configuration and size of the edge contact area between the grinding wheel and workpiece have the heavy effects on the workpiece surface integrity. In consideration of the differences between the point grinding and the conventional high speed cylindrical grinding, the geometric and mathematic models of the edge contact area in point grinding were established. Based on the models, the numerical simulation for the edge contact area was performed. By means of the point grinding experiment, the effect mechanism of the edge contact area on the ground surface integrity was investigated. These will offer the applied theoretic foundations for optimizing the point grinding angles, depth of cut, wheel and workpiece speed, geometrical configuration and size of CBN wheel and some other grinding parameters in point grinding process.

scholarly journals Surface Quality Evaluation of Various Metals After Grinding with Aluminum Oxide Grinding Wheel

2020 ◽  
Vol 9 (1) ◽  
pp. 25-31
Author(s):  
Rosemar Batista Da Silva ◽  
Giordano Francis Vieira ◽  
Letícia Cristina Silva ◽  
Carlos Alberto Damião ◽  
Rodrigo De Souza Ruzzi ◽  
...  
Keyword(s):  
Surface Roughness ◽  
Cast Iron ◽  
Aluminum Oxide ◽  
Surface Quality ◽  
Gray Cast Iron ◽  
Gray Cast ◽  
Surface Finishing ◽  
Depth Of Cut ◽  
Grinding Wheel ◽  
Machined Surfaces

Different metals can respond differently when grinding using the same abrasive grinding wheel, especially in terms of surface quality. In this context, this work aims give a contribution to the metalworking industry by presenting the results of surface finishing after grinding the following metals: VP Atlas steel grade, Gray Cast Iron and two superalloys, Inconel 718 and Ti-6Al-4V. Tests were performed with the aluminum oxide grinding wheel and with following parameters: cutting speed of 37.6 m/s and workspeed of 10 m/min. Two values of depth of cut (15 μm and 30 μm) were tested. The surface roughness (Ra and Rz parameters) were analyzed and SEM images of the machined surfaces were taken and analyzed in order to identify the cutting mechanisms and provide better results discussion. The results showed that the surface roughness increased with the depth of cut; Ra values kept below 0.48 μm for all metals tested. Regarding the machined surface quality, some cracks were observed on the gray cast iron and Ti-6Al-4V surfaces, thereby indicating their relative lower grindability compared to VP Atlas steel under the investigated conditions. No visual thermal damage was observed in the machined surfaces of the samples.

scholarly journals Research on selection of abrasive grain size and cutting parameters when grinding of interrupted surface using aluminum oxide grinding wheel with ceramic binder

2022 ◽  
pp. 93-102
Author(s):  
Do Duc Trung ◽  
Le Dang Ha
Keyword(s):  
Surface Roughness ◽  
Grain Size ◽  
Aluminum Oxide ◽  
Feed Rate ◽  
Depth Of Cut ◽  
Grinding Wheel ◽  
Grinding Process ◽  
Testing Sample ◽  
Abrasive Grain ◽  
Ceramic Binder

In this article, a study on intermittent surface grinding using aluminum oxide grinding wheel with ceramic binder is presented. The testing material is 20XH3A steel (GOST standard – Russian Federation). The testing sample has been sawn 6 grooves, with the width of each groove of 10 mm, the grooves are evenly distributed on the circumference of sample. The testing sample resembles a splined shaft. An experimental matrix of nine experiments has been built by Taguchi method, in which abrasive grain size, workpiece speed, feed rate and depth of cut were selected as input variables. At each experiment, surface roughness (Ra) and roundness error (RE) have been measured. Experimental results show that the aluminum oxide and ceramic binder grinding wheels are perfectly suitable for grinding intermittent surface of 20XH3A steel. Data Envelopment Analysis based Ranking (DEAR) method has been used to solve the multi-objective optimization problem. The results also showed that in order to simultaneously ensure minimum surface roughness and RE, abrasive grain size is 80 mesh, workpiece speed is 910 rpm, feed rate is 0.05 mm/rev and depth of cut is 0.01 mm. If evaluating the grinding process through two criteria including surface roughness and RE, depth of cut is the parameter having the greatest effect on the grinding process, followed by the influence of feed rate, workpiece speed, and abrasive grain is the parameter having the least effect on the grinding process. In addition, the effect of each input parameter on each output parameter has also been analyzed, and orientations for further works have also been recommended in this article

scholarly journals Optimization of parameters in cylindrical and surface grinding for improved surface finish

2018 ◽  
Vol 5 (5) ◽  
pp. 171906 ◽  
Author(s):  
Dinesh Kumar Patel ◽  
Deepam Goyal ◽  
B. S. Pabla
Keyword(s):  
Surface Roughness ◽  
Surface Integrity ◽  
Surface Finish ◽  
Surface Characteristics ◽  
Surface Grinding ◽  
Depth Of Cut ◽  
Grinding Wheel ◽  
Cylindrical Grinding ◽  
Grinding Parameters ◽  
Wheel Material

Surface integrity has attracted the attention of researchers for improving the functional performance of engineering products. Improvement in surface finish, one of the important parameters in surface integrity, has been attempted by researchers through different processes. Grinding has been widely used for final machining of components requiring smooth surfaces coupled with precise tolerances. Proper selection of grinding wheel material and grade with grinding parameters can result in an improved surface finish and improved surface characteristics. The present work reports the study of the effect of grinding parameters on surface finish of EN8 steel. Experiments were performed on surface grinding and cylindrical grinding for optimization of grinding process parameters for improved surface finish. Grinding wheel speed, depth of cut, table feed, grinding wheel material and table travel speed for surface grinding operation, and work speed for cylindrical grinding operation were taken as the input parameters with four types of grinding wheels (Al 2 O 3 of grades K and L, and white alumina of grades J and K). The surface roughness was taken as an output parameter for experimentation. The grinding wheel material and grade have been observed to be the most significant variables for both cylindrical grinding and surface grinding. Surface roughness in the case of surface grinding is better compared to that of cylindrical grinding, which can be attributed to vibrations produced in the cylindrical grinding attachment. Surface roughness ( R a ) values of 0.757 µm in cylindrical grinding and 0.66 µm in surface grinding have been achieved.

Experimental Investigation on Effects of Depth of Cut on Micro-Geometric Properties in Quick-Point Grinding

2007 ◽  
Vol 359-360 ◽  
pp. 103-107
Author(s):  
Shi Chao Xiu ◽  
Chang He Li ◽  
Guang Qi Cai
Keyword(s):  
Surface Roughness ◽  
Point Contact ◽  
Ground Surface ◽  
Depth Of Cut ◽  
Grinding Wheel ◽  
Abrasive Wheel ◽  
Geometric Properties ◽  
Edge Contact ◽  
Contact Width ◽  
Ground Surface Roughness

Quick-point grinding is used to machine the round surface with super abrasive wheel at high grinding speed. Because it is point contact between the grinding wheel and the workpiece due to the point grinding angles in the process, the grinding model is different from the conventional cylindrical grinding in theory. Especially, the edge contact width between the wheel and the workpiece is not always equal to the thickness of the wheel, but rests with the depth of cut and the grinding angles greatly. The depth of cut has the effects on the micro-geometric properties especially the ground surface roughness by means of the variations of the edge contact width, the grinding force and heat in the process. Based on the theoretical studies on the surface roughness, the quick-point grinding experiments and the measures for the surface roughness were performed at different depth of cut. The effective mechanism of the depth of cut on the ground surface roughness was analyzed deeply. Some conclusions to influence surface roughness were also gained.

SURFACE ROUGHNESS ANALYSIS OF CRYO-TREATED AND TEMPERED STEELS IN CYLINDRICAL GRINDING OPERATION

2021 ◽  
pp. 2150107
Author(s):  
MENDERES KAM ◽  
UFUK KABASAKALOĞLU
Keyword(s):  
Surface Roughness ◽  
Metal Cutting ◽  
Depth Of Cut ◽  
Grinding Wheel ◽  
Cylindrical Grinding ◽  
Automotive Components ◽  
Heat Treated ◽  
Treated Sample ◽  
Roughness Analysis ◽  
Manufacturing Applications

Cylindrical grinding operation is an important metal cutting process used as a finish process to achieve the surface quality and dimensional stability of the products. In this context, experimental work and statistical analysis in researches contribute to improve product quality of manufactured parts. Tempered steels are widely used for automotive components and manufacturing applications. The objective of this study is to analyze the surface roughness (Ra) values of cryogenically (cryo) treated and tempered steels in cylindrical grinding operation. According to the grinding experiments created by the Taguchi method, grinding wheels (Al2O3 and SiC), heat treated steel samples (HT, CT24, and CT36) and depth of cut (50, 100, and 150[Formula: see text][Formula: see text]m) were selected to determine the optimum surface roughness values of these steels. The results showed that significant improvements in Ra values of cryo-treated and tempered steels were observed. The lowest Ra values were obtained in cryo-treated sample (CT36) with SiC grinding wheel and depth of cut (50[Formula: see text][Formula: see text]m).

Evaluation and investigation of grinding process of biomedical polymer (PEEK)

2021 ◽  
pp. 095440892110225
Author(s):  
Mohammad Khoran ◽  
Bahman Azarhoushang ◽  
Hossein Amirabadi
Keyword(s):  
Surface Roughness ◽  
Cutting Speed ◽  
Weight Ratio ◽  
Speed Ratio ◽  
Depth Of Cut ◽  
Grinding Wheel ◽  
Cutting Condition ◽  
Grinding Process ◽  
Wheel Topography ◽  
Overlap Ratio

Polyether ether ketone (PEEK) has been widely used in the medical engineering due to its high strength to weight ratio, creep and wear-resistance, and anti-allergically properties. Grinding is generally used to produce PEEK parts with high accuracy and surface quality requirements. In this research, the tool loading and the effect of cryogenic cooling in the grinding of PEEK are studied for the first time. It is shown that the generated heat in the grinding process, which is mainly influenced by the tool micro-topography, process parameter, and coolant lubricant has an important role in the surface integrity of PEEK. Additionally, the influence of specific material removal rate and the dressing speed ratio on the specific grinding energy of PEEK was studied. The input parameters of the grinding process that are investigated in this study include cutting speed (vs), depth of cut (ae), and feed rate (vft). To investigate the grinding wheel topography, the effects of dressing overlap ratio (Ud) and the dressing speed ratio (qd) were also investigated. Grinding force, surface roughness, and loading of the grinding wheel were considered as output parameters. The experiments were designed based on response surface methodology and the optimum cutting condition was obtained based on this method. The depth of cut and the dressing overlap ratio had respectively the maximum and minimum impact on the surface roughness and cutting forces. Additionally, the tool loading was mainly influenced by the cutting speed.

The study on surface grinding process of TI–6AL–4V alloy with resinoid cBN grinding wheel

2020 ◽  
Vol 34 (22n24) ◽  
pp. 2040135
Author(s):  
Phi-Trong Hung ◽  
Hoang-Tien Dung ◽  
Nguyen-Kien Trung ◽  
Truong-Hoanh Son
Keyword(s):  
Surface Roughness ◽  
Feed Rate ◽  
Chemical Reactivity ◽  
Surface Grinding ◽  
Depth Of Cut ◽  
Grinding Wheel ◽  
Grinding Process ◽  
Wet Grinding ◽  
Ti Alloys ◽  
Cbn Grinding Wheel

The grinding process of Titanium (Ti) alloys is extremely difficult as the cutting temperature is much higher than other machining processes due to the low thermal conductivity, high chemical reactivity, and rapid work hardening during machining of Ti alloys. This research investigates the effect of technology parameters on the surface roughness in the surface grinding of Ti–6Al–4V (Ti64) alloy with resinoid cBN grinding wheel. The experimental results show that the surface roughness is significantly affected by the feed rate, depth of cut (DOC) and cooling condition. Increasing feed rate or DOC all provides the higher surface roughness. The surface roughness obtained in the wet grinding is higher than those of the dry cutting. The scanning electron microscopy (SEM) images of Ti64 surfaces show that the machining surface with fewer defects can be produced with wet grinding process.

Regression Modeling of Surface Roughness in Grinding

2011 ◽  
Vol 271-273 ◽  
pp. 34-39 ◽  
Author(s):  
Ilhan Asiltürk ◽  
Levent Çelik ◽  
Eyüb Canli ◽  
Gürol Önal
Keyword(s):  
Surface Roughness ◽  
Manufacturing Sector ◽  
Depth Of Cut ◽  
Grinding Wheel ◽  
Grinding Process ◽  
Important Indicator ◽  
Manufacturing Method ◽  
Grinding Parameters ◽  
Reliable Model ◽  
Art Industry

Grinding is a widely used manufacturing method in state of art industry. By realizing needs of manufacturers, grinding parameters must be carefully selected in order to maintain an optimum point for sustainable process. Surface roughness is generally accepted as an important indicator for grinding parameters. In this study, effects of grinding parameters to surface roughness were experimentally and statistically investigated. A complete factorial experimental flow was designed for three level and three variable. 62 HRC AISI 8620 cementation steel was used in grinding process with 95-96% Al2O3 grinding wheel. Surface roughness values (Ra, Rz) were measured at the end of process by using depth of cut, feed rate and workpiece speed as input parameters. Experimental results were used for modeling surface roughness values with linear, quadric and logarithmic regressions by the help of MINITAB 14 and SPSS 16 software. The best results according to comparison of models considering determination coefficient were achieved with quadric regression model (84.6% for Ra and 89% for Rz). As a result, a reliable model was developed in grinding process which is a highly complex machining operation and depth of cut was determined as the most effective parameter on grinding by variance analysis (ANOVA). Obtained theoretical and practical acquisitions can be used in various areas of manufacturing sector in the future.

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