Analysis of Energy Partition in Grinding

1995 ◽  
Vol 117 (1) ◽  
pp. 55-61 ◽  
Author(s):  
C. Guo ◽  
S. Malkin
Keyword(s):  
Wheel Speed ◽  
Energy Partition ◽  
Composite Surface ◽  
Workpiece Surface ◽  
Abrasive Grains ◽  
Temperature Distributions ◽  
Analytical Results ◽  
Creep Feed Grinding ◽  
Grinding Fluid ◽  
Creep Feed

An analysis is presented for the fraction of the energy transported as heat to the workpiece during grinding. The abrasive grains and grinding fluid in the wheel pores are considered as a thermal composite which moves relative to the grinding zone at the wheel speed. The energy partition fraction to the workpiece is modeled by setting the temperature of the workpiece surface equal to that of the composite surface at every point along the grinding zone, which allows variation of the energy partition along the grinding zone. Analytical results indicate that the energy partition fraction to the workpiece is approximately constant along the grinding zone for regular down grinding, but varies greatly along the grinding zone for regular up grinding and both up and down creep-feed grinding. The resulting temperature distributions have important implications for selecting up versus down grinding especially for creep-feed operations.

Investigation of Grinding Force and Surface Integrity of IC10 in Creep Feed Grinding

2020 ◽  
Author(s):  
Jun-chen Li ◽  
Wen-hu Wang ◽  
Rui-song Jiang ◽  
Xiao-fen Liu ◽  
Huang Bo ◽  
...  
Keyword(s):  
Surface Roughness ◽  
Tool Wear ◽  
Material Removal ◽  
Normal Force ◽  
Removal Rate ◽  
Tangential Force ◽  
Grinding Force ◽  
Wheel Speed ◽  
Creep Feed Grinding ◽  
Creep Feed

Abstract The IC10 superalloy material is one of the most important materials for aero-engine turbine blade due to its excellent performances. However, it is difficult to be machined because of its special properties such as terrible tool wear and low machined efficiency. The creep feed grinding is widely used in machining IC10 superalloy due to the advance in reducing tool wear, improving material removal rate and surface quality. The creep feed grinding is a promising machining process with the advantages of high material removal rate due to large cutting depth, long cutting arc and very slow workpiece, and its predominant features might have significant influence on the grinding force and surface quality for the workpiece. Hence, it is of great importance to study the grinding force and surface integrity in creep feed grinding IC10 superalloy. In this paper, a series of orthogonal experiments have been carried out and the effects of grinding parameters on the grinding force and the surface roughness are analyzed. The topographies and defects of the machined surface were observed and analyzed using SEM. The results of the experiments show that the tangential force is decreased with the workpiece speed increasing. However, there is no significant change in tangential force with the increasing of grinding depth and wheel speed. The normal force is decreased with the workpiece speed increasing when the workpiece speed is less than 150 mm/min, but when the workpiece speed is more than 150 mm/min the normal force is increased tardily. Moreover, the normal force is increased sharply with the increase of grinding depth and is increased slowly with the increase of wheel speed. In general, the surface roughness is increased with workpiece speed and grinding depth increasing, while the trend of increase corresponding that of workpiece speed is more evident. The value of the surface roughness is decreased with wheel speed increasing. And it is found out that the main defect is burning of the IC10 superalloy material in creep feed grinding by energy spectrum analysis of some typical topography in this study.

Assessment of Grinding Fluid Effectiveness in Continuous-Dress Creep Feed Grinding

CIRP Annals ◽  
2002 ◽  
Vol 51 (1) ◽  
pp. 235-240 ◽  
Author(s):  
J. Webster ◽  
E. Brinksmeier ◽  
C. Heinzel ◽  
M. Wittmann ◽  
K. Thoens
Keyword(s):  
Creep Feed Grinding ◽  
Grinding Fluid ◽  
Creep Feed

Effects of Grinding Parameters on Creep Feed Grinding

2013 ◽  
Vol 658 ◽  
pp. 255-258
Author(s):  
X.F. Bi
Keyword(s):  
Contact Length ◽  
Grinding Wheel ◽  
Workpiece Surface ◽  
Working Zone ◽  
Grinding Performance ◽  
Creep Feed Grinding ◽  
Grinding Parameters ◽  
Creep Feed ◽  
High Depth

Creep feed grinding can obtain an excellent grinding performance for its creep feed with high depth of cutting. However the large contact length and large feed result in large amount of heat accumulating in working zone and cause burn on workpiece surface. A series of grinding tests are performed to obtain burn variation with grinding parameters using different grinding wheel and workpiece in this paper. Grinding energy is also recorded and used to evaluate the influence of grinding parameter on burn.

The workpiece temperature, fluid cooling effectiveness and burning threshold of grinding energy in creep feed grinding

1998 ◽  
Vol 212 (5) ◽  
pp. 383-391 ◽  
Author(s):  
S-B Wang ◽  
K-H Fuh
Keyword(s):  
Published Data ◽  
Transfer Model ◽  
Scaling Analysis ◽  
Cooling Effectiveness ◽  
Workpiece Surface ◽  
Creep Feed Grinding ◽  
Creep Feed ◽  
Grinding Conditions ◽  
Moving Direction ◽  
Fluid Cooling

In this study, a heat transfer model based on numerical analysis of creep feed grinding is proposed. This model is verified to predict the workpiece surface temperature and to find the fraction of heat entering the workpiece. The fluid cooling effectiveness and the effects of specific grinding conditions on the critical grinding energy when the workpiece burns are also discussed. Meanwhile, scaling analysis is performed to explain the influence that conduction behaviour in the moving direction exerts on creep feed grinding. Compared with the published data, the thermal analysis adopted in this paper is shown to be valid.

FEM Analysis of Single Grit Chip Formation in Creep-Feed Grinding of Inconel 718 Superalloy

2011 ◽  
Vol 325 ◽  
pp. 128-133
Author(s):  
Ali Zahedi ◽  
J. Akbari
Keyword(s):  
Chip Formation ◽  
Inconel 718 ◽  
Materials Science ◽  
Fem Analysis ◽  
3D Fem ◽  
Workpiece Surface ◽  
Whole Process ◽  
Creep Feed Grinding ◽  
Creep Feed ◽  
Inconel 718 Superalloy

Recent advances in materials science have necessitated the development and understanding of manufacturing processes for safe and repeatable utilization. Grinding is shown to be a promising material removal process especially for brittle and hard to cut materials such as superalloys. Grinding has always been associated with analysis and modeling complications regarding its nature which has limited its extension and reliability of use. The first step in analysis of grinding is considering the action of a single abrasive grit on workpiece surface. In this work the action of a single CBN abrasive grit in creep-feed grinding process of Inconel 718 superalloy is modeled and analyzed using a 3D FEM software, DEFORM. Thermal and mechanical characteristics of the mutual interaction between grit and workpiece surface, and different chip formation phases are defined which can further be used to analyze the whole process.

scholarly journals Microscopic Wear Characteristics of Ceramic Grinding Wheel in Creep Feed Grinding

2022 ◽  
Vol 16 (1) ◽  
pp. 5-11
Author(s):  
Masakazu Fujimoto ◽  
Keisuke Shimizu ◽  
◽  
Keyword(s):  
Grinding Force ◽  
Grinding Wheel ◽  
Grinding Wheels ◽  
Workpiece Surface ◽  
Wear Characteristics ◽  
Working Surface ◽  
Creep Feed Grinding ◽  
Creep Feed ◽  
Wear Mode ◽  
Ceramic Grinding

This paper deals with the microscopic wear characteristics of ceramic (Seeded Gel, SG) grinding wheels used in creep feed grinding. Creep feed grinding experiments with SG grinding wheels were carried out compared to rose-pink alumina (RA) grinding wheels. To clear the wear characteristics of the wheel working surface in creep feed grinding, changes in the shapes of grain cutting edges were observed by a field emission-scanning electron microscope (FE-SEM). This is a self-sharpening phenomenon based on micro fractures generated on the top of SG grain cutting edges. On the other hand, large fracture and attritious wear effected RA grain cutting edges. In addition, the features of any grain cutting edges were evaluated using attritious wear flat percentage. Changes in attritious wear flat percentage of SG grits maintained constant value and were stable. From these results, the influence of wear mode of the grinding wheel on grinding characteristics parameter, such as grinding force and workpiece surface roughness, is understood.

scholarly journals Feasibility study of creep feed grinding of 300M steel with zirconium corundum wheel

2021 ◽  
Author(s):  
Jiaqiang Dang ◽  
Heng Zang ◽  
Qinglong An ◽  
Weiwei Ming ◽  
Ming Chen
Keyword(s):  
Feasibility Study ◽  
Creep Feed Grinding ◽  
Creep Feed ◽  
300M Steel
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