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.

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.

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.

Development of Electroplated CBN Wheel with Cemented Carbide Base for Precision Grinding of Compressor Cylinder Vane Slot

2007 ◽  
Vol 329 ◽  
pp. 495-500
Author(s):  
Hang Gao ◽  
W.G. Liu ◽  
Y.G. Zheng
Keyword(s):  
Surface Roughness ◽  
Ground Surface ◽  
Cemented Carbide ◽  
Grinding Wheel ◽  
Precision Grinding ◽  
Base Surface ◽  
Compressor Cylinder ◽  
Cbn Wheel ◽  
Micro Holes ◽  
Ground Surface Roughness

It is experimentally found that existing micro-holes or micro-concaves on the cemented carbide base surface of electroplated CBN wheel is one of important reasons to worsen the combining intensity of the electroplated abrasives layer with the grinding wheel base. It is well solved by sealing the holes or concaves with steam sealing method. Further more the electroplated CBN wheel with cemented carbide base for precision grinding of compressor cylinder vane slot is developed by optimizing the electroplating prescription and process. Productive grinding results show that the ground surface roughness, size precision and the wheel life have reached the advanced index of the same type of wheel imported.

scholarly journals Evaluation of the Relationship Among Dressing Conditions Using Prismatic Dresser, Dressing Resistance, and Grinding Characteristics

2022 ◽  
Vol 16 (1) ◽  
pp. 12-20
Author(s):  
Gen Uchida ◽  
Takazo Yamada ◽  
Kouichi Ichihara ◽  
Makoto Harada ◽  
Tatsuya Kohara ◽  
...  
Keyword(s):  
Surface Roughness ◽  
Surface Condition ◽  
Ground Surface ◽  
Grinding Wheel ◽  
Grinding Process ◽  
Practical Application ◽  
Wheel Surface ◽  
The Difference ◽  
Ground Surface Roughness ◽  
The Relationship

In the grinding process, the grinding wheel surface condition changes depending on the dressing conditions, which affects the ground surface roughness and grinding resistance. Several studies have been reported on the practical application of dressing using prismatic dressers in recent years. However, only a few studies that quantitatively evaluate the effects of differences in dressing conditions using prismatic dresser on the ground surface roughness and grinding resistance have been reported. Thus, this study aims to evaluate quantitatively the effect of the difference in dressing conditions using the prismatic dresser on the ground surface roughness and grinding resistance by focusing on the dressing resistance. In the experiment, dressing is performed by changing the dressing lead and the depth of dressing cut with a prismatic dresser, and the ground surface roughness and grinding resistance are measured. Consequently, by increasing the dressing lead and the depth of dressing cut, the ground surface roughness increased, and the grinding resistance decreased. This phenomenon was caused by the increase in dressing resistance when the dressing lead and the depth of dressing cut were increased, which caused a change in the grinding wheel surface condition. Furthermore, the influence of the difference in dressing conditions using the prismatic dresser on the ground surface roughness and grinding resistance can be quantitatively evaluated by using the dressing resistance.

scholarly journals Correlation between surface roughness and AE signals in ceramic grinding based on spectral analysis

2018 ◽  
Vol 249 ◽  
pp. 03003 ◽  
Author(s):  
M A Aulestia Viera ◽  
F A Alexandre ◽  
P R Aguiar ◽  
R B Silva ◽  
E C Bianchi
Keyword(s):  
Surface Roughness ◽  
Frequency Domain ◽  
Surface Condition ◽  
Depth Of Cut ◽  
Grinding Wheel ◽  
Process Conditions ◽  
Workpiece Surface ◽  
Grinding Conditions ◽  
Grinding Machine ◽  
Frequency Domain Techniques

The study and monitoring of the workpiece surface roughness is one of the most important parameters of the grinding process. This paper proposes a method for analysing the surface condition of ground ceramic components by means of the acoustic emission (AE) signal analysis along with frequency domain techniques. Tests were performed using a surface-grinding machine equipped with a resin-bond diamond grinding wheel, where signals were collected at 2 MHz. Alumina workpieces were machined under six different depth of cut values, covering slight, medium and severe grinding conditions. Frequency content was studied in order to select bands closely related to the process conditions. An analysis of the root mean square values (RMS) of the signals was performed, seeking for a correlation with the surface roughness. Digital filters were applied to the raw signals. The RMS values filtered for two frequency bands presented a better fitting to the linear regression, which is highly desirable for setting a threshold to detect the workpiece surface conditions and implementing into a monitoring system. Results showed that the amplitude of the signals presented different characteristics in the frequency domain according to the workpiece surface condition. It was also observed a higher spectral activity in the severe grinding conditions.

Effect of the Grain Depth of Cut on Cross Sectional Profile - Theoretical Analysis of Ground Surface Roughness

2012 ◽  
Vol 565 ◽  
pp. 28-33
Author(s):  
Nobuhito Yoshihara ◽  
Hiroaki Murakami ◽  
Naohiro Nishikawa ◽  
Masahiro Mizuno ◽  
Toshirou Iyama
Keyword(s):  
Surface Roughness ◽  
Ground Surface ◽  
Depth Of Cut ◽  
Cross Sectional ◽  
Grinding Conditions ◽  
Cross Sectional Profile ◽  
Fundamental Research ◽  
Sectional Profile ◽  
Ground Surface Roughness ◽  
The Relationship

Roughness is important criterion of ground surface. When the surface roughness is demanded to be smooth, it is required to make the grinding conditions optimum. To optimize the grinding conditions, relationship between grinding conditions and ground surface roughness must be known. Therefore, it has been attempted to reveal the effect of grinding conditions on the roughness of ground surface over the years. From previous researches, it becomes possible to estimate the ground surface roughness with statistical grinding theory. However, there are some parameters, such as wheel depth of cut and distribution of abrasive grain, are not factored in the theory. In this paper, fundamental research on cross sectional profile is carried out to consider the relationship between the wheel depth of cut and ground surface roughness.

Investigation of Grinding Characteristics of Cemented Carbides YL10.2 and YF06

2014 ◽  
Vol 1017 ◽  
pp. 104-108 ◽  
Author(s):  
Tao Xu ◽  
Jian Wu Yu ◽  
Zhong Jian Zhang ◽  
Jian Gang Tu ◽  
Xiang Zhong Liu ◽  
...  
Keyword(s):  
Surface Roughness ◽  
Material Removal ◽  
Ground Surface ◽  
Grinding Force ◽  
Cemented Carbides ◽  
Depth Of Cut ◽  
Grinding Wheel ◽  
Machined Surface ◽  
Ultrafine Grained ◽  
Machined Surface Roughness

YL10.2 and YF06 are ultrafine-grained cemented carbides, and grinding experiments were carried out with resin-bonded diamond grinding wheel. Based on measured grinding force, surface roughness and SEM topography, experimental results were analyzed; grinding forces and depth of grinding approach linear correlation; and the grinding force of YF06 is greater than that of YL10.2 in rough grinding, but the grinding force increases significantly if depth of cut is greater than a certain value in finish grinding. The trend of machined surface roughness looks like “V” type with the increasing of depth of cut; the material removal behavior of ultrafine-grained cemented carbides in grinding was observed; the ploughing and fragmentation exist simultaneously on the ground surface, and the dominated material removal behavior depends on the grinding parameters or chemical composition of workpiece.

Proposal of Purification Method of Grinding Coolant by Dissolution of Micro-Bubbles

2012 ◽  
Vol 565 ◽  
pp. 406-411
Author(s):  
Haruhisa Sakamoto ◽  
Hitoshi Tsubakiyama ◽  
Masaki Takeishi
Keyword(s):  
Surface Roughness ◽  
Ground Surface ◽  
Supply System ◽  
Grinding Wheel ◽  
Initial Condition ◽  
Purification Method ◽  
Micro Bubble ◽  
Grinding Machine ◽  
Ground Surface Roughness ◽  
Electrical Adsorption

In this study, the purification method of coolant by the micro-bubble dissolution is proposed. The micro-bubble dissolving device with the simple configuration is incorporated within the coolant supply system of an external grinding machine, and then, the effect of the purification method is examined experimentally on the ground surface roughness. From the results, the following are clarified: The dissolved micro-bubbles can rise up grinding debris by electrical adsorption, and then, the debris is concentrated on the coolant surface in the coolant tank. By this effect, the grinding debris, especially the grain fragments of the grinding-wheel, can be removed from the coolant. The coolant purification by the enough dissolved micro-bubbles reduces the density of grinding debris down to a fourth of the initial condition. This purification effect improves the ground surface roughness. The longer the dissolving duration is, the more the ground surface roughness is improved. Eventually, the improvement of the surface roughness reaches down to a half of that without the micro-bubble dissolution.

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