Edge Chipping of Rock: An Experimental Study

2010 ◽  
Vol 443 ◽  
pp. 456-461 ◽  
Author(s):  
Qing Yu Yao ◽  
Liang Chi Zhang ◽  
Rong Hao Bao ◽  
Jason Lunn ◽  
Craig Melmeth
Keyword(s):  
Experimental Study ◽  
Linear Relation ◽  
Cutting Performance ◽  
Depth Of Cut ◽  
Edge Chipping

This paper investigates experimentally the edge chipping of a rock to assess the cutting performance of a conical and a pyramidal tip. It was found that the conical tip generates many radiated cracks and results in a larger amount of fine rock grains due to crashing. The size of chips produced by the pyramidal tip is bigger. It was concluded that the critical chipping energy has approximately a linear relation with h9/4 of which h is the depth of cut of the tip.

Effect of Cutter Performance on Finished Tooth Form in Gear Shaving

1992 ◽  
Author(s):  
I. Moriwaki ◽  
M. Fujita
Keyword(s):  
Computer Simulation ◽  
Mean Value ◽  
Cutting Performance ◽  
Simulation Program ◽  
Tooth Surface ◽  
Depth Of Cut ◽  
Small Depth ◽  
Computer Simulation Program ◽  
Tooth Form ◽  
Cutting Model

Abstract The authors have been developed a computer simulation program of gear shaving. In the present paper, a new cutting model of shaving process is proposed so as to incorporate an effect of a cutting performance of shaving cutter into the simulation program. In this cutting model, it is assumed that a tooth flank material of work gear can be removed only when a depth of cut of a cutting edge exceeds a certain criterion. It is also assumed that the criterion have no definite value but has the nominal distribution over the tooth surface. The mean value of the distribution can define a characteristic of cutting performance of shaving cutter. The small mean value means that even small depth of cut can cause a stock removal; i.e. a good cutter performance. The computer simulations on gear shaving are performed to reveal the effect of the cutter performance on shaved tooth form. Under the conditions used in these simulations, the pressure angle error on the shaved tooth profile becomes remarkable as the cutter performance becomes worse. Thus, the developed computer simulation program of gear shaving has a reliability on the prediction of shaved tooth form. It will be useful for design of shaving cutter, judgement of tool life, and so on.

scholarly journals Experimental study on the depth of cut of granite in pulsating water-jet

2018 ◽  
Vol 377 ◽  
pp. 012116
Author(s):  
Rupam Tripathi ◽  
Sergej Hloch ◽  
Madhulika Srivastava ◽  
Vivek Nigam ◽  
Somnath Chattopadhyaya ◽  
...  
Keyword(s):  
Experimental Study ◽  
Water Jet ◽  
Depth Of Cut ◽  
Pulsating Water Jet

Experimental study on the surface roughness of micromilled Elgiloy™

2011 ◽  
Vol 225 (11) ◽  
pp. 2138-2143 ◽  
Author(s):  
P Zhang ◽  
B Wang ◽  
Y Liang ◽  
M J Jackson
Keyword(s):  
Experimental Study ◽  
Surface Roughness ◽  
Surface Topography ◽  
Industrial Applications ◽  
Depth Of Cut ◽  
Mean Deviation ◽  
Machining Accuracy ◽  
Feed Speed ◽  
3D Surface ◽  
Axial Depth

Elgiloy™ is a cobalt-based alloy with excellent physical and chemical performance, and is used widely in medical and industrial applications. The machining accuracy, surface topography, and surface damaged layer play an important role in the use of the alloy for specific applications. In this paper, an experimental study on the surface roughness of precision micromilling of Elgiloy is accomplished by using a super-fine-grained tungsten carbide milling cutter. The surface topography of the surface of the slots milled is achieved with different values of feed speed and axial depth of cut. Three-dimensional (3D) measurement results are considered to reflect the surface topography based on a comparison of the difference between two-dimensional (2D) and 3D surface roughness measurements. The arithmetic mean deviation of the slots’ 3D surface is achieved by using a white light interferometric profilometer. By using analysis of variance (ANOVA), the factors of feed speed, axial depth of cut, and their interaction are proven to be the most important factors relating to the magnitude of surface roughness.

Study on the Cutting Performance of HFCVD Diamond Coated Silicon Nitride Inserts in Dry Turning Aluminum Silicon Alloy

2010 ◽  
Vol 126-128 ◽  
pp. 226-231
Author(s):  
Fang Hong Sun ◽  
Bin Shen ◽  
Guo Dong Yang
Keyword(s):  
Silicon Nitride ◽  
Diamond Films ◽  
Cvd Diamond ◽  
Cutting Performance ◽  
Depth Of Cut ◽  
Dry Turning ◽  
Silicon Alloy ◽  
Aluminum Silicon Alloy ◽  
Composite Diamond ◽  
Aluminum Silicon

To evaluate the cutting performance of CVD diamond coated silicon nitride insert, two kinds of CVD diamond films, namely microcrystalline diamond (MCD) and composite diamond films, are deposited on silicon nitride (Si3N4) inserts using the hot filament chemical vapor deposition (HFCVD) method. The characterization of as-deposited diamond films is conducted using the scanning electron microscope (SEM), optical interferometric profiler, X –ray diffraction (XRD) and Raman spectrum. The turning tests for as-fabricated MCD and composite diamond coated insert, as well as uncoated silicon nitride insert, are performed in dry turning aluminum silicon alloy, where the cutting speed, feed rate and depth of cut are fixed as ν = 2000 r/min, f=0.1 mm/r and ap=1 mm. The results demonstrate that the main tool failure is the tool wear. As compared with the uncoated silicon nitride insert, the woking life time of the diamond coated insert can be increased by a factor of above 7.

scholarly journals Investigate the Effect of Cutting Parameters on Surface Roughness When Milling X12m Steel

2021 ◽  
pp. 258-263
Author(s):  
Do Thi Kim Lien ◽  
Nguyen Dinh Man ◽  
Phung Tran Dinh
Keyword(s):  
Experimental Study ◽  
Surface Roughness ◽  
Feed Rate ◽  
Cutting Tool ◽  
Cutting Speed ◽  
Cutting Parameters ◽  
Face Milling ◽  
Negligible Effect ◽  
Depth Of Cut ◽  
The Relationship

In this paper, an experimental study on the effect of cutting parameters on surface roughness was conducted when milling X12M steel. The cutting tool used in this study is a face milling cutter. The material that is used to make the insert is the hard alloy T15K6. The cutting parameters covered in this study include the cutting speed, the feed rate and depth of cut. The experiments are performed in the form of a rotating center composite design. The analysis shows that for both Ra and Rz: (1) the feed rate has the greatest influence on the surface roughness while the depth of cut, the cutting speed has a negligible effect on the surface roughness. (2) only the interaction between the feed rate and the depth of the cut has a significant effect on both Ra and Rz while the interaction between the cutting speed and the feed rate, the interaction between the cutting speed and the depth of cut have a negligible effect on surface roughness. A regression equation showing the relationship between Ra, Rz, and cutting parameters has also been built in this study.

An Experimental Study on Edge Chipping in Ultrasonic Vibration Assisted Grinding of Bio-Ceramic Materials

2013 ◽  
Author(s):  
Hayelom D. Tesfay ◽  
Yuzhu Xie ◽  
Zhigang Xu ◽  
Bing Yan ◽  
Z. C. Li
Keyword(s):  
Experimental Study ◽  
Ultrasonic Vibration ◽  
Ceramic Materials ◽  
Abrasive Machining ◽  
Machining Processes ◽  
Edge Chipping ◽  
Joint Replacements ◽  
Machine Slot ◽  
Downstream Processes ◽  
Ultrasonic Vibration Assisted Grinding

Bio-ceramics have been widely employed in dental restorations, repairing bones, and joint replacements etc. due to their high compressive strength, superior wear resistance, and natural aesthetical appearance. Abrasive machining processes such as grinding have been used to obtain a smooth surface and desired dimensions for bio-ceramic parts. However, a major technical issue resulted from abrasive machining processes is edge chipping. The edge chipping could lead to the failure of bio-ceramics and has to be removed by downstream processes. It not only increases machining cost but also introduces potential deficiencies into the bio-ceramic parts. This paper present an experimental study on the edge chipping in ultrasonic vibration assisted grinding (UVAG) of bio-ceramic materials. An innovative UVAG system is developed and employed to machine three bio-ceramic materials (Lava, partially fired Lava, and Alumina). The effect of ultrasonic vibration on the edge chipping is investigated by observing under scanning electron microscope (SEM). The experimental results show that the edge chipping can be significantly reduced with the assistance of ultrasonic vibration. For the diamond grinding, there exist a lot of edge chippings along the machined slot edge that varies from 0.3 mm to 1.2 mm, whereas for the UVAG, there are only several tiny edge chippings with size from ∼0.03 mm to ∼0.1 mm along the machine slot edge. The results indicate that the UVAG system developed has a great potential to be used in production to improve bio-ceramic materials’ surface integrity, in particular, edge chipping quality.

scholarly journals Profile Cutting on Alumina Ceramics by Abrasive Waterjet. Part 2: Cutting Performance Models

2006 ◽  
Vol 220 (5) ◽  
pp. 715-725 ◽  
Author(s):  
J Wang ◽  
H Liu
Keyword(s):  
Performance Measures ◽  
Predictive Models ◽  
Cutting Performance ◽  
Abrasive Waterjet ◽  
Depth Of Cut ◽  
Alumina Ceramics ◽  
Predictive Capability ◽  
Performance Models ◽  
Kerf Taper ◽  
Model Predictions

Predictive models for the major cutting performance measures, such as the kerf taper and depth of cut, are developed for both straight-slit cutting and profile cutting by an abrasive waterjet. The plausibility and predictive capability of the models are assessed and verified by comparing the model predictions with the corresponding experimental data. Very good correlations between the predicted and experimental results have been found, which confirm the adequacy of the models for use in process planning.

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