Geometric Parameters Optimization of Carbide Reamer when Reaming TC18

2020 ◽  
Vol 866 ◽  
pp. 12-21
Author(s):  
W. Yang ◽  
W.P. Dong ◽  
W. Wang ◽  
Y. Li ◽  
Yong Guo Wang
Keyword(s):  
Titanium Alloy ◽  
Tool Wear ◽  
Simulation Model ◽  
Experimental Method ◽  
Cutting Temperature ◽  
Geometric Parameters ◽  
Parameters Optimization ◽  
Cutting Fluid ◽  
Machining Accuracy ◽  
Factors Influencing

Cutting temperature is one of the most important parameters in the cutting process, which has an important influence on the machining accuracy of workpiece, the power consumed by the machining and the degree of tool wear. There are many factors influencing the cutting temperature, such as the properties of workpiece materials, geometric parameters of the tool, the use of cutting fluid and so on. In this paper, we used orthogonal experimental method, with titanium alloy TC18 as the carrier and AdvantEdge as the simulation platform, established the cutting simulation model. With the cutting temperature as the optimization goal, the geometric parameters of the cemented carbide reamer are optimized.

Cryogenic Machining of Titanium Ti-5553 Alloy

2019 ◽  
Vol 141 (4) ◽  
Author(s):  
Yusuf Kaynak ◽  
Armin Gharibi
Keyword(s):  
Titanium Alloy ◽  
Tool Wear ◽  
Cutting Temperature ◽  
Cryogenic Cooling ◽  
Machining Process ◽  
Dry Machining ◽  
Cryogenic Machining ◽  
Machining Performance ◽  
Wide Range ◽  
New Generation

Titanium alloy Ti-5Al-5V-3Cr-0.5Fe (Ti-5553) is a new generation of near-beta titanium alloy that is commonly used in the aerospace industry. Machining is one of the manufacturing methods to produce parts that are made of this near-beta alloy. This study presents the machining performance of new generation near-beta alloys, namely, Ti-5553, by focusing on a high-speed cutting process under cryogenic cooling conditions and dry machining. The machining experiments were conducted under a wide range of cutting speeds, including high speeds that used liquid nitrogen (LN2) and carbon dioxide (CO2) as cryogenic coolants. The experimental data on the cutting temperature, tool wear, force components, chip breakability, dimensional accuracy, and surface integrity characteristics are presented and were analyzed to evaluate the machining process of this alloy and resulting surface characteristics. This study shows that cryogenic machining improved the machining performance of the Ti-5553 alloy by substantially reducing the tool wear, cutting temperature, and dimensional deviation of the machined parts. The cryogenic machining also produced shorter chips as compared to dry machining.

scholarly journals Experimental study on machining deformation of large scale slender beam with weak stiffness  of Ti6Al4V

2021 ◽  
Author(s):  
Qimeng Liu ◽  
Jinkai Xu ◽  
Huadong Yu
Keyword(s):  
Titanium Alloy ◽  
Tool Wear ◽  
High Speed ◽  
Large Scale ◽  
Machining Accuracy ◽  
Beam Structure ◽  
High Speed Milling ◽  
Deformation Problem ◽  
Machining Deformation ◽  
Slender Beams

Abstract Large-scale slender beam structures with weak stiffness are widely used in the aviation field. There will be a great deformation problem in machining because the overall stiffness of slender beam parts is lower. Firstly, the cutting mechanism and stability theory of the Ti6Al4V material are analyzed, and then the auxiliary support is carried out according to the machining characteristics of the slender beam structure. The feasibility of the deformation suppression measures for the slender beam is verified by experiments. The experimental analysis shows that on the basis of fulcrum auxiliary support, the filling of paraffin melt material is capable of increasing the damping of the whole system, improving the overall stiffness of the machining system, and inhibiting the chatter effect of machining. This method is effective to greatly improve the accuracy and efficiency during machining of slender beam parts. On the premise of the method of processing support with the combination of fulcrum and paraffin, if the tool wear is effectively controlled, the high precision machining of large-scale slender beams can be realized effectively, and the machining deformation of slender beams can be reduced. Although high speed milling has excellent machining effect on the machining accuracy of titanium alloy materials, severe tool wear is observed during high-speed milling of titanium alloy materials. Therefore, high-speed milling of titanium alloy slender beam is suitable to be carried out in the finishing process, which can effectively control tool wear and improve the machining accuracy of parts. Finally, the process verification of typical weak stiffness slender beam skeleton parts is carried out. Through the theoretical and technical support of the experimental scheme, the machining of large-scale slender beam structure parts with weak stiffness is realized.

Experimental Investigation of Mechanical-Thermal Characteristics in High Efficiency Turning Titanium Alloy Ti6Al4V

2016 ◽  
Vol 836-837 ◽  
pp. 20-28
Author(s):  
Li Min Shi ◽  
Cheng Yang ◽  
Qi Jun Li
Keyword(s):  
Titanium Alloy ◽  
Tool Wear ◽  
Cutting Force ◽  
High Efficiency ◽  
Cutting Temperature ◽  
Cutting Speed ◽  
Thermal Characteristics ◽  
Tool Failure ◽  
Minimal Quantity Lubrication ◽  
Titanium Alloy Ti6al4v

Titanium alloy Ti6Al4V has poor machinability, which leads to high unit cutting force and cutting temperature, rapid tool failure. In this study, the effect of the cutting speed, feed rate and cooling condition on cutting force and cutting temperature is critically analysed by turning experiment. At the same time, the relationship is established among tool wear, cutting force and cutting temperature. This investigation has shown that cutting speed is the decisive factor which increasing cutting force and cutting temperature. In the process of turning, tool wear results in high amounts of heat and mechanical stress, which leads to serious tool wear. The Minimal Quantity Lubrication reduces the frictional condition at the chip-tool, decreases cutting force and cutting temperature, and delays the tool failure.

Research on Wear Mechanisms while Turning Titanium Alloy TC4

2010 ◽  
Vol 97-101 ◽  
pp. 1845-1848
Author(s):  
Dong Liu ◽  
Wu Yi Chen ◽  
Hong Hai Xu ◽  
Xue Ke Luo
Keyword(s):  
Titanium Alloy ◽  
Tool Wear ◽  
Cutting Force ◽  
Flank Wear ◽  
Aerospace Industry ◽  
Cutting Temperature ◽  
High Chemical ◽  
Adhesion Wear ◽  
Wear Tool ◽  
High Chemical Activity

Titanium alloys are widely used in aerospace industry due to their excellent mechanical properties. Because of their low thermal conductivity, high chemical activity, large friction coefficient and so on, such problems occur during the cutting process as high cutting temperature, large specific cutting force and serious tool wear, leading to low machining efficiency. The cutting force, forms of tool wear; wear mechanics were experimentally studied and analyzed while machining titanium alloy TC4 using carbide tools YS8 and YG8. The experimental results indicated that the tool wear of YG8 influenced cutting force not very remarkable when flank wear smaller than 0.25mm. But when the flank wear was bigger than 0.25mm, the cutting force increased rapidly with the flank wear increased. And the tool wear influenced the cutting force dramatically. The forms of tool wear during machining TC4 using carbide tool were adhesion wear, tool chipping and. The desquamation and chipping of tool caused by adhesion wear were the main reason of the tool failure.

Machinability of the EBM Ti6Al4V in Cryogenic Turning

2015 ◽  
Vol 651-653 ◽  
pp. 1183-1188 ◽  
Author(s):  
Stefano Sartori ◽  
Alberto Bordin ◽  
Stefania Bruschi ◽  
Andrea Ghiotti
Keyword(s):  
Tool Wear ◽  
Liquid Nitrogen ◽  
Surface Integrity ◽  
Cutting Temperature ◽  
Chip Morphology ◽  
Cutting Fluid ◽  
Cobalt Chromium ◽  
Machined Surface ◽  
Surgical Implants ◽  
Cutting Zone

In machining operations, the adoption of a cutting fluid is necessary to mitigate the effects of the high temperatures generated on the cutting zone, and, therefore, to avoid severe detrimental effects on the tool wear and surface integrity. In the biomedical field, the traditional processes to manufacture surgical implants made of Titanium and Cobalt Chromium Molybdenum alloys involve turning and milling operations. To cool the cutting tool with standard oil emulsions leaves contaminants on the machined surfaces, which require further cleaning steps that are expensive in terms of time and costs. Currently, this limitation is marginally overcome by machining without the coolant; however, as a consequence, severe tool wear and poor surface integrity take place. In the last years, many studies have been conducted on the application of Liquid Nitrogen as a coolant in machining difficult-to-cut materials such as Ti6Al4V. Thanks to its properties to evaporate immediately when getting in contact with the cutting zone, thus living the workpiece and chips dry and clean other than its ability to lower the cutting temperature. The adoption of Liquid Nitrogen as a cooling mean in machining surgical implants may represent an optimum solution enhancing the benefits of dry machining. This work is aimed at evaluating the performances of the Liquid Nitrogen as a coolant in semi-finishing turning of Ti6Al4V produced by Electron Beam Melting, a comparison with dry turning is presented. The alloy machinability in such conditions is evaluated in terms of tool wear, machined surface integrity and chip morphology.

Tool Wear Investigation on Dry Electrostatic Cooling in Turning Titanium Alloy Ti6Al4V

2010 ◽  
Vol 97-101 ◽  
pp. 2058-2061 ◽  
Author(s):  
Hui Wang ◽  
Rong Di Han ◽  
Yang Wang
Keyword(s):  
Titanium Alloy ◽  
Tool Wear ◽  
Tool Life ◽  
Metal Cutting ◽  
Cutting Speed ◽  
Cutting Fluid ◽  
Dry Cutting ◽  
Set Up ◽  
Titanium Alloy Ti6al4v ◽  
Emulsion Oil

The machinability of Titanium Alloy Ti6Al4V is poor, the traditional methods to machining is application of cutting fluids with the active additives which cause environmental pollution and health problems. In this paper, the dry electrostatic cooling was applied instead of cutting fluid for the aim of green cutting Ti6Al4V. The ionized device and gas supply system was set up, the effects of dry electrostatic cooling, emulsion oil and dry cutting on tool wear have been examined in turning of Ti6Al4V with carbide tools YG8, the curve between tool flank wear and cutting time was proposed, and the equation between cutting speed and tool life was set up. The results of experiments indicated that application of dry electrostatic cooling reduced the tool wear and increased the tool life. The research results show that clean production was achieved in metal cutting associated with dry electrostatic cooling.

Impact of Cutting Tool Geometric Parameters on Milling Titanium Alloy TC4

2011 ◽  
Vol 418-420 ◽  
pp. 1418-1422 ◽  
Author(s):  
Yue Hai Lou ◽  
Jin Qiao Zou ◽  
Jin Yong Huang ◽  
Yin Jin
Keyword(s):  
Titanium Alloy ◽  
Cutting Tool ◽  
Physical Simulation ◽  
Cutting Temperature ◽  
Small Deformation ◽  
Rake Angle ◽  
Field Trials ◽  
Milling Process ◽  
Geometric Parameters ◽  
The Impact

It’s very difficult to machine titanium alloy because of its features of small deformation coefficient, low thermal conductivity, small elastic modulus and large chemical activity. In this paper, we take titanium alloy TC4 as an example; using the finite element method (FEM) for the physical simulation of milling process, analyze the impact of some tool geometric parameters, such as rake angle, relief angle, rounded cutting edge radius etc., on chip form, cutting force, cutting temperature distribution of cutting tool and the maximum cutting temperature of rake face etc.. On this basis, we choose the best tool geometries, which can be taken as a theoretical reference for developing process plans of titanium alloy to reduce the number of tests and costs of field trials and to improve productivity.

scholarly journals INFLUENCE OF THE USE OF CARAPA GUIANENSIS OIL (ANDIROBA OIL) COMPARED WITH COMMERCIAL CUTTING FLUID IN THE TURNING PROCESS OF THE ABNT 1045 STEEL GRADES

2019 ◽  
Vol 16 (33) ◽  
pp. 21-29
Author(s):  
T. I. M. BOTELHO ◽  
G. S. FIGUEIREDO ◽  
F. M. PRAXEDES ◽  
J. V. U. TEIXEIRA ◽  
E. B. MONTEIRO
Keyword(s):  
Tool Wear ◽  
Surface Finish ◽  
Cutting Temperature ◽  
Cutting Speed ◽  
Cutting Fluid ◽  
Cutting Fluids ◽  
Turning Process ◽  
Machining Processes ◽  
Carapa Guianensis ◽  
1045 Steel

The increasing technological advances obtained both in the development of new materials and of machine tools increased the demand for the machining processes and in addition, the use of increased cutting fluids. However, it’s necessary to have characteristics that don’t harm the environment and the operator. In machining processes, cutting fluids, when properly chosen and applied, may reflect benefits during the manufacturing process. This work evaluated the performance of a commercial cutting fluid by comparing it with vegetable oil extracted from carapa guianensis in the abnt 1045 steel turning process. The cutting speed (vc), tool feed (f) and depth (ap) and the influence of the use of both of them on the metal was verified with the following variables: chip analysis, surface finish, cutting temperature and tool wear. It was observed that with the use of andiroba oil, better chip was generated for the safety of the operator, higher cutting temperatures in the piece, higher tool wear and better surface finish with a difference of 23% compared to commercial cutting fluid. Thus, the fluid from andiroba based on the conventional application demonstrated a viable alternative in the turning process of abnt 1045 steel, because it’s biodegradable and reduces petroleum-based cutting fluids.

scholarly journals INFLUENCE OF THE USE OF CARAPA GUIANENSIS OIL (ANDIROBA OIL) COMPARED WITH COMMERCIAL CUTTING FLUID IN THE TURNING PROCESS OF THE ABNT 1045 STEEL GRADES

2019 ◽  
Vol 16 (33) ◽  
pp. 927-935
Author(s):  
T. I. M. BOTELHO ◽  
G. S. FIGUEIREDO ◽  
F. M. PRAXEDES ◽  
J. V. U. TEIXEIRA ◽  
E. B. MONTEIRO
Keyword(s):  
Tool Wear ◽  
Surface Finish ◽  
Cutting Temperature ◽  
Cutting Speed ◽  
Cutting Fluid ◽  
Cutting Fluids ◽  
Turning Process ◽  
Machining Processes ◽  
Carapa Guianensis ◽  
1045 Steel

The increasing technological advances obtained both in the development of new materials and of machine tools increased the demand for the machining processes and in addition, the use of increased cutting fluids. However, it’s necessary to have characteristics that don’t harm the environment and the operator. In machining processes, cutting fluids, when properly chosen and applied, may reflect benefits during the manufacturing process. This work evaluated the performance of a commercial cutting fluid by comparing it with vegetable oil extracted from carapa guianensis in the abnt 1045 steel turning process. The cutting speed (vc), tool feed (f) and depth (ap) and the influence of the use of both of them on the metal was verified with the following variables: chip analysis, surface finish, cutting temperature and tool wear. It was observed that with the use of andiroba oil, better chip was generated for the safety of the operator, higher cutting temperatures in the piece, higher tool wear and better surface finish with a difference of 23% compared to commercial cutting fluid. Thus, the fluid from andiroba based on the conventional application demonstrated a viable alternative in the turning process of abnt 1045 steel, because it’s biodegradable and reduces petroleum-based cutting fluids.

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