scholarly journals A Review on Recent Studies: Non-Traditional Machining of Titanium Alloys

2020 ◽  
Author(s):  
Mohammad Arafat ◽  
Ning Fanghua
Keyword(s):  
Titanium Alloys ◽  
Research Direction ◽  
Research Area ◽  
Raw Material ◽  
Machining Process ◽  
Machining Processes ◽  
Existing Problems ◽  
Industrial Sectors ◽  
Advanced Machining ◽  
Petroleum Chemical

Till now titanium and its alloys used in different industrial sectors. Unique material characteristics make it as desirable raw material for the automotive, aerospace, petroleum, chemical, marine and biomedical industries. It requires deformation and fabrication process as difficult-to-cut material. There are several challenges hidden under the processes. Therefore, advanced machining process performance investigation in titanium and its titanium alloys machining has taken part of the research concern. A number of research works has been done in every year to show the research direction. However, most of them are specifically in one machining process. It’s important to have a clear picture of a research area for further research consideration. Therefore, this review aim to study recent articles of non-traditional machining process of titanium and its alloys. The focus of this review was on the contribution for solving existing problems by using non-traditional machining processes, most efficient process and general overview. At the end it also provided a summary of sustainable issue of non-traditional machining processes.

scholarly journals An Investigation on High-Resolution Temperature Measurement in Precision Fly-Cutting

Sensors ◽  
2021 ◽  
Vol 21 (4) ◽  
pp. 1530
Author(s):  
Daniel Gräbner ◽  
Tjarden Zielinski ◽  
Andrey Vovk ◽  
Oltmann Riemer ◽  
Bernhard Karpuschewski ◽  
...  
Keyword(s):  
Measurement Data ◽  
Machining Process ◽  
Machining Parameters ◽  
Good Match ◽  
Machining Processes ◽  
Machining Process Simulation ◽  
Fly Cutting ◽  
Advanced Machining ◽  
Simulation Results ◽  
Modification Of The Surface

The loads acting on a workpiece during machining processes determine the modification of the surface of the final workpiece and, thus, its functional properties. In this work, a method that uses thermocouples to measure the temperature in precision fly-cutting machining with high spatial and temporal resolution is presented. Experiments were conducted for various materials and machining parameters. We compare experimental measurement data with results from modern and advanced machining process simulation and find a good match between experimental and simulation results. Therefore, the simulation is validated by experimental data and can be used to calculate realistic internal loads of machining processes.

scholarly journals Defect Analysis and Detection of Cutting Regions in CFRP Machining Using AWJM

Materials ◽  
2019 ◽  
Vol 12 (24) ◽  
pp. 4055 ◽  
Author(s):  
Pedro F. Mayuet Ares ◽  
Franck Girot Mata ◽  
Moisés Batista Ponce ◽  
Jorge Salguero Gómez
Keyword(s):  
Statistical Significance ◽  
Machining Process ◽  
Alternative Methods ◽  
Abrasive Waterjet ◽  
Machining Processes ◽  
Taper Angle ◽  
Abrasive Waterjet Machining ◽  
Industrial Sectors ◽  
Waterjet Machining ◽  
High Production

The use of composite materials with a polymeric matrix, concretely carbon fiber reinforced polymer, is undergoing further development owing to the maturity reached by the forming processes and their excellent relationship in terms of specific properties. This means that they can be implemented more easily in different industrial sectors at a lower cost. However, when the components manufactured demand high dimensional and geometric requirements, they must be subjected to machining processes that cause damage to the material. As a result, alternative methods to conventional machining are increasingly being proposed. In this article, the abrasive waterjet machining process is proposed because of its advantages in terms of high production rates, absence of thermal damage and respect for the environment. In this way, it was possible to select parameters (stand-off distance, traverse feed rate, and abrasive mass flow rate) that minimize the characteristic defects of the process such as taper angle or the identification of different surface quality regions in order to eliminate striations caused by jet deviation. For this purpose, taper angle and roughness evaluations were carried out in three different zones: initial or jet inlet, intermediate, and final or jet outlet. In this way, it was possible to characterize different cutting regions with scanning electronic microscopy (SEM) and to distinguish the statistical significance of the parameters and their effects on the cut through an analysis of variance (ANOVA). This analysis has made it possible to distinguish the optimal parameters for the process.

Investigation on Precision Turning of Titanium Alloys

2012 ◽  
Vol 622-623 ◽  
pp. 399-403 ◽  
Author(s):  
Tarun Thomas George ◽  
J. Venugopal ◽  
M. Anthony Xavior ◽  
R. Vinayagamoorthy
Keyword(s):  
Surface Roughness ◽  
Titanium Alloys ◽  
Working Conditions ◽  
Cutting Temperature ◽  
Machining Process ◽  
Machining Processes ◽  
Machined Surface ◽  
Percentage Contribution ◽  
Precision Turning

The quality of a machined surface is becoming more and more important to satisfy the increasing demands of sophisticated component performance, longevity, and reliability. The objective of this paper is to analyze the performance of precision turning using conventional lathe on Ti6Al4V under dry working conditions. Various parameters that affect the machining processes were identified and a consensus was reached regarding its values. The proposed work is to perform machining under the selected levels of conditions and parameters and to estimate the, cutting temperature and surface roughness generated as the result of the machining process. ANOVA is used to find the percentage contribution of each parameter to the surface roughness and cutting temperature.

Studying The Effect of a New Mixed Cutting Fluid on Surface Roughness

2020 ◽  
Vol 38 (11A) ◽  
pp. 1593-1601
Author(s):  
Mohammed H. Shaker ◽  
Salah K. Jawad ◽  
Maan A. Tawfiq
Keyword(s):  
Surface Roughness ◽  
Stainless Steel ◽  
Cutting Parameters ◽  
Machining Process ◽  
Cutting Fluid ◽  
Depth Of Cut ◽  
Cutting Fluids ◽  
Machining Processes ◽  
Dry Cutting ◽  
Cutting Speeds

This research studied the influence of cutting fluids and cutting parameters on the surface roughness for stainless steel worked by turning machine in dry and wet cutting cases. The work was done with different cutting speeds, and feed rates with a fixed depth of cutting. During the machining process, heat was generated and effects of higher surface roughness of work material. In this study, the effects of some cutting fluids, and dry cutting on surface roughness have been examined in turning of AISI316 stainless steel material. Sodium Lauryl Ether Sulfate (SLES) instead of other soluble oils has been used and compared to dry machining processes. Experiments have been performed at four cutting speeds (60, 95, 155, 240) m/min, feed rates (0.065, 0.08, 0.096, 0.114) mm/rev. and constant depth of cut (0.5) mm. The amount of decrease in Ra after the used suggested mixture arrived at (0.21µm), while Ra exceeded (1µm) in case of soluble oils This means the suggested mixture gave the best results of lubricating properties than other cases.

scholarly journals Temperature monitoring in the subsurface during single lip deep hole drilling

2020 ◽  
Vol 87 (12) ◽  
pp. 757-767
Author(s):  
Robert Wegert ◽  
Vinzenz Guski ◽  
Hans-Christian Möhring ◽  
Siegfried Schmauder
Keyword(s):  
Cutting Parameters ◽  
Drill Hole ◽  
Machining Process ◽  
Hole Drilling ◽  
Drilling Process ◽  
Deep Hole ◽  
Machining Processes ◽  
Deep Hole Drilling ◽  
Feed Force ◽  
Cutting Zone

AbstractThe surface quality and the subsurface properties such as hardness, residual stresses and grain size of a drill hole are dependent on the cutting parameters of the single lip deep hole drilling process and therefore on the thermomechanical as-is state in the cutting zone and in the contact zone between the guide pads and the drill hole surface. In this contribution, the main objectives are the in-process measurement of the thermal as-is state in the subsurface of a drilling hole by means of thermocouples as well as the feed force and drilling torque evaluation. FE simulation results to verify the investigations and to predict the thermomechanical conditions in the cutting zone are presented as well. The work is part of an interdisciplinary research project in the framework of the priority program “Surface Conditioning in Machining Processes” (SPP 2086) of the German Research Foundation (DFG).This contribution provides an overview of the effects of cutting parameters, cooling lubrication and including wear on the thermal conditions in the subsurface and mechanical loads during this machining process. At first, a test set up for the in-process temperature measurement will be presented with the execution as well as the analysis of the resulting temperature, feed force and drilling torque during drilling a 42CrMo4 steel. Furthermore, the results of process simulations and the validation of this applied FE approach with measured quantities are presented.

scholarly journals Influence of a closed-loop controlled laser metal wire deposition process of S Al 5356 on the quality of manufactured parts before and after subsequent machining

2021 ◽  
Author(s):  
Dina Becker ◽  
Steffen Boley ◽  
Rocco Eisseler ◽  
Thomas Stehle ◽  
Hans-Christian Möhring ◽  
...  
Keyword(s):  
Wall Thickness ◽  
Closed Loop ◽  
Deposition Process ◽  
Metal Wire ◽  
Machining Process ◽  
Machining Processes ◽  
Initial State ◽  
Additive Process ◽  
Shape Accuracy ◽  
Loop Control

AbstractThis paper describes the interdependence of additive and subtractive manufacturing processes using the production of test components made from S Al 5356. To achieve the best possible part accuracy and a preferably small wall thickness already within the additive process, a closed loop process control was developed and applied. Subsequent machining processes were nonetheless required to give the components their final shape, but the amount of material in need of removal was minimised. The effort of minimising material removal strongly depended on the initial state of the component (wall thickness, wall thickness constancy, microstructure of the material and others) which was determined by the additive process. For this reason, knowledge of the correlations between generative parameters and component properties, as well as of the interdependency between the additive process and the subsequent machining process to tune the former to the latter was essential. To ascertain this behaviour, a suitable test part was designed to perform both additive processes using laser metal wire deposition with a closed loop control of the track height and subtractive processes using external and internal longitudinal turning with varied parameters. The so manufactured test parts were then used to qualify the material deposition and turning process by criteria like shape accuracy and surface quality.

Electrical Discharge Grinding (EDG) of Polycrystalline Diamond - Effect of Machining Polarity

2014 ◽  
Vol 1025-1026 ◽  
pp. 628-632 ◽  
Author(s):  
Mohammad Zulafif Rahim ◽  
Song Lin Ding ◽  
John Mo
Keyword(s):  
Electrical Discharge ◽  
Complex Geometry ◽  
Polycrystalline Diamond ◽  
Machining Process ◽  
Morphological Examination ◽  
Carbon Structure ◽  
Finishing Process ◽  
Advanced Machining ◽  
The Difference ◽  
Pcd Tools

Electrical discharge grinding (EDG) is an advanced machining process and can be utilised to fabricate complex geometry of PCD tools. However, the PCD removal mechanism in this process is complicated. This study was carried out to understand the difference in PCD surface structure with difference EDG polarities. The study revealed that the finishing process with negative polarity is the reason for the porous structure on the surface. Further analysis on the chemical element and carbon structure were implemented as the morphological examination of the surface.

Study on a Practical Case of Cleaner Production Audit

2012 ◽  
Vol 424-425 ◽  
pp. 1334-1337
Author(s):  
Rong Jun Su
Keyword(s):  
Sewage Treatment ◽  
Social Benefit ◽  
Cleaner Production ◽  
Raw Material ◽  
Practical Case ◽  
Steam Boiler ◽  
Existing Problems ◽  
High Efficient ◽  
Total Investment ◽  
Treatment Facilities

Through the extensive research and deep analysis of existing problems in cleaner production, four middle/high expense plans were set forth, demonstrated and implemented. These four implement plans included high efficient steam traps, energy saving system of steam boiler, improved sewage treatment facilities and vacuum raw material feeder. The total investment was 330 thousand Yuan RMB. The annual discharge of waste water was reduced by about 30 thousand tons and annual economic profit was 680 thousand Yuan RMB. Moreover, better environmental and social benefit was created. More importantly, a sustainable cleaner production mechanism was established for the factory.

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