Grinding Forces and Grinding Energy in High Speed Grinding for Quenched Steel

2009 ◽  
Vol 416 ◽  
pp. 504-508 ◽  
Author(s):  
Bao Fu Feng ◽  
Hua Li Su ◽  
Quan Zhong Zhang ◽  
Lei Zheng ◽  
Quan Fang Gai ◽  
...  
Keyword(s):  
Heat Flux ◽  
High Speed ◽  
Cubic Boron Nitride ◽  
Grinding Force ◽  
Grinding Forces ◽  
Specific Grinding Energy ◽  
Grinding Parameters ◽  
Force Ratio ◽  
High Speed Grinding ◽  
Quenched Steel

Grinding experiments for quenched high-speed tool steel by resin bonded CBN (cubic boron nitride) wheel were conducted with a surface grinder. The grinding forces were measured under different grinding parameters. The effects of grinding parameters on grinding forces and grinding force ratio are discussed. Specific grinding energy and heat flux over the grinding zone are computed according to grinding parameters and grinding forces. The effects of grinding parameters on specific grinding energy and heat flux are investigated.

Grinding Force in Creep Feed Grinding of Titanium Alloy with Monolayer Brazed CBN Wheels

2012 ◽  
Vol 565 ◽  
pp. 94-99 ◽  
Author(s):  
Chang Yong Yang ◽  
Jiu Hua Xu ◽  
Wen Feng Ding
Keyword(s):  
Titanium Alloy ◽  
Boron Nitride ◽  
Cubic Boron Nitride ◽  
Grinding Force ◽  
Grinding Forces ◽  
Specific Grinding Energy ◽  
Creep Feed Grinding ◽  
Creep Feed ◽  
Force Ratio ◽  
Composite Filler

In this paper, grinding forces of titanium alloy Ti-6Al-4V are measured during creep feed grinding with brazed cubic boron nitride (CBN) wheels. The effects of process parameters on grinding force, force ratio and specific grinding energy are investigated in detail. The grinding force is low and force ratio is about 1.5, and the specific grinding energy of titanium alloys Ti-6Al-4V is about 65J/mm3. Also, CBN wheels brazed with composite filler of Ag-Cu-Ti and 0.5wt.% lanthanum show better grinding performance than the counterpart brazed with Ag-Cu-Ti filler in this investigation.

High-Speed Grinding for Superalloy

2011 ◽  
Vol 487 ◽  
pp. 104-107
Author(s):  
B.F. Feng ◽  
Quan Fang Gai ◽  
Zheng Lei ◽  
Z.L. Su
Keyword(s):  
Friction Coefficient ◽  
High Speed ◽  
Removal Rate ◽  
Grinding Force ◽  
Speed Increase ◽  
Grinding Speed ◽  
Section Area ◽  
Force Ratio ◽  
High Speed Grinding ◽  
Single Grain

An investigation is reported on high-speed single-grain grinding for superalloy. The grooves’ morphology and area removal ratio, grinding force ratio, specific grinding force, and friction coefficient are studied. The area removal rate η increases with the grinding section area increasing. The plowing decreases with the grinding section area and grinding speed increase. Surface integrity can be improved under high speed and deep grinding. It is proved by experiments that the single-grain grinding friction coefficient decreases with the grinding speed increasing.

scholarly journals Experimental study of single cubic boron nitride grains in the ultrasound-assisted high-speed grinding

2017 ◽  
Vol 9 (2) ◽  
pp. 168781401769354 ◽  
Author(s):  
Dao-hui Xiang ◽  
Zhong-yun Liu ◽  
Zhi-kun Zhou ◽  
Yun-long Yao
Keyword(s):  
Experimental Study ◽  
Boron Nitride ◽  
Surface Quality ◽  
High Speed ◽  
Cubic Boron Nitride ◽  
Grinding Force ◽  
Abrasive Particles ◽  
Ultrasonic Assisted ◽  
High Speed Grinding

The kinematic characteristics, grinding force, surface quality of workpiece surface, and wear of abrasive particles were studied by theoretical analysis and experimental study on the single cubic boron nitride abrasive particles under ultrasonic-assisted high-speed grinding. Under the condition of the same grinding parameters, the motion characteristics and the grinding forces of the two machining modes of general grinding and ultrasonic-assisted grinding are compared and analyzed. Research shows that the ultrasonic vibration is applied in the common external circular grinding on grinding particle movement characteristics changed obviously, grinding particle trajectory of variable length, cutting groove width wider, thereby improving the grinding efficiency and the grinding removal rate; ultrasonic assisted under high speed grinding, the grinding force is higher than that of common grinding force is small, efficiency of grinding under ultrasonic processing mode is much higher than ordinary grinding, the surface quality of the workpiece has improved markedly.

Study on Abrasive Geometry of Quick-Point Grinding

2008 ◽  
Vol 389-390 ◽  
pp. 235-239
Author(s):  
Suo Xian Yuan ◽  
Dong Na Xie ◽  
Ya Dong Gong
Keyword(s):  
High Speed ◽  
Basic Characteristic ◽  
Geometrical Property ◽  
Chip Thickness ◽  
Contact Length ◽  
Grinding Force ◽  
Grinding Forces ◽  
High Speed Grinding ◽  
Geometry Analysis ◽  
Maximum Contact

Quick-point grinding is more advanced and more efficiency as a method of high and super-high speed grinding. Its main grinding properties are low grinding forces and temperature. Its basic characteristic is the axis of wheel and workpiece are not parallel and not contained by the same plane. That makes the geometrical property of the quick-point grinding different from conventional cylindrical grinding. This paper emphasizes particularly on the abrasive geometry analysis on the quick-point grinding. After founding a model, this paper has educed equivalent wheel diameter, maximum contact length, undeformed chip thickness and so on. In this paper the quick-point-grinding angle is made use of to find a model of grinding force and deduce an expressions.

scholarly journals Experimental Study on Grinding Force of Zirconia Ceramics in Dry/Wet Grinding Environment

2018 ◽  
Vol 198 ◽  
pp. 02004
Author(s):  
Junping Zhang ◽  
Weidong Wang ◽  
Songhua Li ◽  
Han Tao
Keyword(s):  
Grinding Force ◽  
Grinding Wheel ◽  
Feed Speed ◽  
Zirconia Ceramics ◽  
Grinding Forces ◽  
Measuring Device ◽  
Linear Speed ◽  
Wet Grinding ◽  
Dry Grinding ◽  
Force Ratio

The impacts of different linear speed of grinding wheel, grinding depth and workpiece feed speed with or without grinding fluid on grinding force were studied by plane grinding machining of zirconia ceramics. The impacts of different machining environment and grinding parameter on normal and tangential grinding forceswere studied by testing the grinding force during grinding with a force measuring device. The studies showed that the normal and tangential grinding forces decrease with the increase of the linear speed of grinding wheel and increase with the improvement of grinding depth and workpiece feed speed. The grinding depth has the greatest impacts on the normal and tangential grinding forces in dry grinding environment; while in wet grinding environment, the grinding depth exerts the greatest impacts on the normal grinding force and the linear speed of grinding wheel imposes the greatest impacts on the tangential grinding force. In addition, it was found that the normal grinding force in dry grinding is minor than that in wet grinding, that the tangential grinding force in dry grinding is greater than that in wet grinding, and that the grinding force ratio in dry grinding is lower than that in wet grinding.

scholarly journals Study on Effect of Ultrasonic Vibration on Grinding Force and Surface Quality in Ultrasonic Assisted Micro End Grinding of Silica Glass

2014 ◽  
Vol 2014 ◽  
pp. 1-10 ◽  
Author(s):  
Zhang Jianhua ◽  
Zhao Yan ◽  
Zhang Shuo ◽  
Tian Fuqiang ◽  
Guo Lanshen ◽  
...  
Keyword(s):  
Surface Quality ◽  
Ultrasonic Vibration ◽  
Silica Glass ◽  
Removal Rate ◽  
Surface Characteristics ◽  
Diamond Wheel ◽  
Grinding Force ◽  
Grinding Forces ◽  
Grinding Parameters ◽  
Ductile Machining

Ultrasonic vibration assisted micro end grinding (UAMEG) is a promising processing method for micro parts made of hard and brittle materials. First, the influence of ultrasonic assistance on the mechanism of this processing technology is theoretically analyzed. Then, in order to reveal the effects of ultrasonic vibration and grinding parameters on grinding forces and surface quality, contrast grinding tests of silica glass with and without ultrasonic assistance using micro radial electroplated diamond wheel are conducted. The grinding forces are measured using a three-component dynamometer. The surface characteristics are detected using the scanning electron microscope. The experiment results demonstrate that grinding forces are significantly reduced by introducing ultrasonic vibration into conventional micro end grinding (CMEG) of silica glass; ultrasonic assistance causes inhibiting effect on variation percentages of tangential grinding force with grinding parameters; ductile machining is easier to be achieved and surface quality is obviously improved due to ultrasonic assistance in UAMEG. Therefore, larger grinding depth and feed rate adopted in UAMEG can lead to the improvement of removal rate and machining efficiency compared with CMEG.

A Study on Heat Transfer in High-Speed Grinding of Titanium Matrix Composites

2016 ◽  
Vol 693 ◽  
pp. 1003-1008 ◽  
Author(s):  
Xin Xin Xi ◽  
Wen Feng Ding ◽  
Zheng Li ◽  
Jiu Hua Xu ◽  
Xun Yang Wang
Keyword(s):  
Heat Transfer ◽  
High Speed ◽  
Cubic Boron Nitride ◽  
Matrix Composites ◽  
Titanium Matrix ◽  
Titanium Matrix Composites ◽  
Cbn Wheel ◽  
High Speed Grinding ◽  
Superabrasive Wheels ◽  
Vitrified Cbn Wheel

High-speed grinding experiment of titanium matrix composites is carried out with cubic boron nitride (CBN) superabrasive wheels in this work. The heat transfer into the titanium matrix composites (TMCs) is discussed based on theoretical analysis. A calculation method of thermal ratio passing into the workpiece is represented. Results obtained show that high-speed grinding of PTMCs using vitrified CBN wheel has a greater thermal ratio passing into the workpiece than using electroplated CBN wheel. Moreover, a linear relationship is established between es and ds1/4ap-3/4vw-1/2.

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