scholarly journals Cutting Properties of Olive Sucker

2013 ◽  
Vol 16 (3) ◽  
pp. 82-86 ◽  
Author(s):  
Abdullah Sessiz ◽  
Ahmet Konuralp Elicin ◽  
Resat Esgici ◽  
Gultekin Ozdemir ◽  
Ladislav Nozdrovický
Keyword(s):  
Moisture Content ◽  
Cutting Force ◽  
Energy Requirement ◽  
Specific Cutting Energy ◽  
Sectional Area ◽  
Cross Sectional ◽  
Cutting Energy ◽  
Table Olive ◽  
Branch Cutting ◽  
Olive Varieties

Abstract The exact knowledge of olive suckers and branches cutting behaviour is one of the main parameters for optimizing the design of cutting elements in pruning machines. In this study, the cutting properties of five different varieties of the table olive, namely Halhali, Gullaki, Mavis, Belloti and Zoncuk respectively, were determined. The cutting properties were measured at three moisture content levels (17.05, 34.44, and 39.47 %) and four cross-sectional areas (12.56, 28.27, 50.26 and 78.54 mm2). The results showed that the cutting force and cutting energy requirement of olive suckers decreased with increasing moisture content in all of the olive varieties. However, these properties increased with increasing cross-sectional area. The maximum cutting force, cutting strength, cutting energy requirement and specific cutting energy of olive sucker were obtained at the Halhali variety as 869.15 N, 18.66 MPa, 4.29 J and 0.0875 J.mm-2, respectively, while the minimum cutting values were obtained at the Zoncuk variety as 619.19 N, 14.75 MPa, 2.44 J and 0.0531 J.mm-2, respectively. As a result, the data obtained from cutting tests of the olive sucker can be used in a new design and development of an experimental prototype of olive branch cutting and pruning machine.

scholarly journals Study of the behavior of sugarcane bagasse submitted to cutting

DYNA ◽  
2015 ◽  
Vol 82 (191) ◽  
pp. 171-175 ◽  
Author(s):  
Nelson Arzola ◽  
Joyner García
Keyword(s):  
Statistical Analysis ◽  
Moisture Content ◽  
Cutting Force ◽  
Sugarcane Bagasse ◽  
Cutting Speed ◽  
Response Surfaces ◽  
Specific Cutting Energy ◽  
Cutting Energy ◽  
Blade Edge ◽  
Pre Treatment

The aim of this work was to study the behavior of sugarcane bagasse submitted to cutting, as a function of its moisture content, angle of the blade edge and cutting speed. The specific cutting energy and peak cutting force were measured using an experimental facility developed for this series of experiments. An analysis of the results of the full factorial experimental design using a statistical analysis of variance (ANOVA) was performed. The response surfaces and empirical models for the specific cutting energy and peak cutting force were obtained using statistical analysis system software. Low angle of the blade edge and low moisture content are, in this order, the most important experimental factors in determining a low specific cutting energy and a low peak cutting force respectively. The best cutting conditions are achieved for an angle of blade edge of 20.8° and a moisture content of 10% w. b. The results of this work could contribute to the optimal design of sugarcane bagasse pre-treatment systems.

Pulsed Laser Surface Treatment for Improvement of Machinability

2016 ◽  
Vol 725 ◽  
pp. 641-646
Author(s):  
Takuya Inoue ◽  
Keiji Yamada ◽  
Katsuhiko Sekiya ◽  
Ryutaro Tanaka ◽  
Yasuo Yamane
Keyword(s):  
Surface Treatment ◽  
Cutting Force ◽  
Pulsed Laser ◽  
High Hardness ◽  
Laser Surface ◽  
Depth Of Cut ◽  
Specific Cutting Energy ◽  
Cutting Energy ◽  
Die Steels ◽  
Actual Depth

The surface of worn dies are often machined to remove the worn layer and then to re-form its shape. But, in machining operations for hardened materials, the high cutting force sometimes yields bending deflection of low stiffness tools, and results the decrease in productivity and accuracy.In this study, surface treatment by pulsed laser is applied for the high hardness materials to improve the machinability in the machining operation. Die steels are used as work material machined with ball endmills of carbide in the experiments where the cutting force and the actual depth of cut are measured to obtain the specific cutting energy and to evaluate the machinability. In endmilling operations of the nitrided die steels, the actual depth of cut is decreased by the bending deflection of endmill. However, the surface treatment with laser moderates the decreasing of the actual depth of cut. It is confirmed that the surface of workpiece pre-treated with laser has larger roughness than un-treated ones, and the specific cutting energy is decreased by laser surface pre-treatment.

scholarly journals Effect of moisture content on specific cutting energy consumption in Corymbia citriodora and Eucalyptus urophylla woods

2017 ◽  
Vol 45 (113) ◽  
Author(s):  
Débora Fernanda Reis Nascimento ◽  
Luiz Eduardo de Lima Melo ◽  
José Reinaldo Moreira da Silva ◽  
Paulo Fernando Trugilho ◽  
Alfredo Napoli
Keyword(s):  
Energy Consumption ◽  
Moisture Content ◽  
Specific Cutting Energy ◽  
Eucalyptus Urophylla ◽  
Cutting Energy ◽  
Effect Of Moisture ◽  
Corymbia Citriodora

scholarly journals Experimental Investigation on Dry Routing of CFRP Composite: Temperature, Forces, Tool Wear, and Fine Dust Emission

Materials ◽  
2021 ◽  
Vol 14 (19) ◽  
pp. 5697
Author(s):  
Tarek Elgnemi ◽  
Victor Songmene ◽  
Jules Kouam ◽  
Martin B.G. Jun ◽  
Agnes Marie Samuel
Keyword(s):  
Tool Wear ◽  
Cutting Force ◽  
Dust Emission ◽  
Cutting Temperature ◽  
Cutting Speed ◽  
Machining Process ◽  
Specific Cutting Energy ◽  
Fine Dust ◽  
Cutting Energy ◽  
Cutting Speeds

This article presents the influence of machining conditions on typical process performance indicators, namely cutting force, specific cutting energy, cutting temperature, tool wear, and fine dust emission during dry milling of CFRPs. The main goal is to determine the machining process window for obtaining quality parts with acceptable tool performance and limited dust emission. For achieving this, the cutting temperature was examined using analytical and empirical models, and systematic cutting experiments were conducted to assess the reliability of the theoretical predictions. A full factorial design was used for the experimental design. The experiments were conducted on a CNC milling machine with cutting speeds of 10,000, 15,000, and 20,000 rpm and feed rates of 2, 4, and 6 µm/tooth. Based on the results, it was ascertained that spindle speed significantly affects the cutting temperature and fine particle emission while cutting force, specific cutting energy, and tool wear are influenced by the feed rate. The optimal conditions for cutting force and tool wear were observed at a cutting speed of 10,000 rpm. The cutting temperature did not exceed the glass transition temperature for the cutting speeds tested and feed rates used. The fine particles emitted ranged from 0.5 to 10 µm aerodynamic diameters with a maximum concentration of 2776.6 particles for those of 0.5 µm diameters. Finally, results of the experimental optimization are presented, and the model is validated. The results obtained may be used to better understand specific phenomena associated with the milling of CFRPs and provide the means to select effective milling parameters to improve the technology and economics of the process.

The Constant Force Component due to Material Separation and Its Contribution to the Size Effect in Specific Cutting Energy

2005 ◽  
Vol 128 (3) ◽  
pp. 811-815 ◽  
Author(s):  
Sathyan Subbiah ◽  
Shreyes N. Melkote
Keyword(s):  
Size Effect ◽  
Cutting Force ◽  
Orthogonal Cutting ◽  
Chip Thickness ◽  
Constant Force ◽  
Specific Cutting Energy ◽  
Force Component ◽  
Uncut Chip Thickness ◽  
Cutting Energy ◽  
Material Separation

The contribution of material separation in cutting ductile metals to the constant force component, and, hence, to the size effect in specific cutting energy is explored in this paper. A force-decomposition-based framework is proposed to reconcile the varied reasons given in literature for the size effect. In this framework, the cutting force is broken down into three components: one that is decreasing, another that is increasing, and the third that remains constant, with decreasing uncut chip thickness. The last component is investigated by performing orthogonal cutting experiments on OFHC copper at high rake angles of up to 70deg in an attempt to isolate it. As the rake angle is increased, the resulting experimental data show a trend toward a constant cutting-force component independent of the uncut chip thickness. Visual evidence of ductile tearing ahead of the tool associated with material separation leading to chip formation is shown. The measured constant force and the force needed for ductile crack extension are then compared.

scholarly journals Numerical Investigation of the Rock Cutting Performance of a Circular Sawblade

2020 ◽  
Vol 2020 ◽  
pp. 1-18
Author(s):  
Zhiwen Wang ◽  
Qingliang Zeng ◽  
Zhenguo Lu ◽  
Zhihai Liu ◽  
Xu Li
Keyword(s):  
Cutting Force ◽  
Great Influence ◽  
Cutting Parameters ◽  
Simulation Method ◽  
Rock Cutting ◽  
Rock Breaking ◽  
Feed Speed ◽  
Specific Cutting Energy ◽  
Cutting Depth ◽  
Cutting Energy

The rock cutting process with a circular sawblade and the rock breaking mechanism of rock are studied with a numerical simulation method in this paper. The influence of cutting parameters of the circular sawblade on cutting force, rock damage, and specific cutting energy in the process of circular sawblade cutting rock is researched. The cutting force increases with the feed speed and an increase in cutting depth and decline in rotation speed. Cutting rock with double circular sawblades can reduce cutting force. However, the specific cutting energy declines with the increase in cutting depth and the decline in the distance between the double circular sawblades. Cutting parameters have a great influence on the damage range of rock. The research results can be applied to rock processing with a circular sawblade.

Dynamics of Metalcutting

1999 ◽  
Author(s):  
Edmund Isakov
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Cutting Force ◽  
High Shear ◽  
Sectional Area ◽  
Workpiece Material ◽  
Cross Sectional ◽  
Work Material ◽  
Wide Range ◽  
Practical Engineering

Abstract A practical engineering method of calculating tangential cutting force in milling is proposed. The method is based on the ultimate tensile strength of a work material, cross-sectional area of uncut chip, the number of inserts in cut, and a machinability factor of a workpiece material. Milling tests of high shear cutters with torque dynamometer were carried out at a wide range of the cutting conditions and various workpiece materials to verify the concept. Proposed method provides the accuracy of ± 15% or better for calculating tangential cutting force, torque, and power consumption in relationship with machining conditions and work material mechanical properties.

The Influence of Tool Edge Radius on Size Effect in Orthogonal Micro-Cutting Process of 7050-T7451 Aluminum Alloy

2008 ◽  
Vol 375-376 ◽  
pp. 31-35
Author(s):  
Jun Zhou ◽  
Jian Feng Li ◽  
Jie Sun ◽  
Zhi Ping Xu
Keyword(s):  
Aluminum Alloy ◽  
Size Effect ◽  
Cutting Force ◽  
Chip Thickness ◽  
Specific Cutting Energy ◽  
Uncut Chip Thickness ◽  
Tool Edge Radius ◽  
Specific Cutting Force ◽  
Cutting Energy ◽  
Tool Edge

In machining, the size effect is typically characterized by a non-linear increase in the specific cutting energy (or specific cutting force) as the uncut chip thickness is decreased. A finite element model of orthogonal micro-cutting was established to study the influence of tool edge radius on size effect when cutting 7050-T7451 aluminum alloy. Diamond cutting tool was used in the simulation. Specific cutting force and specific cutting energy are obtained through the simulation. The nonlinear scaling phenomenon is evident. The likely explanations for the size effect in small uncut chip thickness were discussed in this paper.

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