scholarly journals Characteristics and Wear Mechanisms of TiAlN-Based Coatings for Machining Applications: A Comprehensive Review

Metals ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 260
Author(s):  
Vitor F. C. Sousa ◽  
Francisco José Gomes Da Silva ◽  
Gustavo Filipe Pinto ◽  
Andresa Baptista ◽  
Ricardo Alexandre
Keyword(s):  
Mechanical Properties ◽  
Wear Behavior ◽  
Machining Process ◽  
Machining Processes ◽  
Process Improvements ◽  
Tool Coatings ◽  
Recent Developments ◽  
Machining Operations ◽  
Industry Sectors ◽  
Cutting Behavior

The machining process is still a very relevant process in today’s industry, being used to produce high quality parts for multiple industry sectors. The machining processes are heavily researched, with the focus on the improvement of these processes. One of these process improvements was the creation and implementation of tool coatings in various machining operations. These coatings improved overall process productivity and tool-life, with new coatings being developed for various machining applications. TiAlN coatings are still very present in today’s industry, being used due to its incredible wear behavior at high machining speeds, high mechanical properties, having a high-thermal stability and high corrosion resistance even at high machining temperatures. Novel TiAlN-based coatings doped with Ru, Mo and Ta are currently under investigation, as they show tremendous potential in terms of mechanical properties and wear behavior improvement. With the improvement of deposition technology, recent research seems to focus primarily on the study of nanolayered and nanocomposite TiAlN-based coatings, as the thinner layers improve drastically these coating’s beneficial properties for machining applications. In this review, the recent developments of TiAlN-based coatings are going to be presented, analyzed and their mechanical properties and cutting behavior for the turning and milling processes are compared.

Späne- und Stauberfassung bei der CFK-Zerspanung*/Extraction of chips and dust in machining operations of CFRP. Investigation on CFRP dry machining in industrial applications

2018 ◽  
Vol 108 (06) ◽  
pp. 473-478
Author(s):  
A. Gebhardt ◽  
M. Schneider
Keyword(s):  
Industrial Applications ◽  
Machining Process ◽  
Dry Machining ◽  
Machining Processes ◽  
Dry Cutting ◽  
Clamping System ◽  
Cutting Processes ◽  
Machining Operations

Bauteile aus CFK (kohlenstofffaserverstärkte Kunststoffe) werden meist spanend endbearbeitet. Diese Bearbeitung kann unter Überflutung durch KSS (Kühlschmierstoffe) oder trocken stattfinden. Die hier vorgestellte Studie zeigt für die Trockenzerspanung, wie die notwendige Erfassung von Stäuben und Spänen stattfindet, welche Technologien eingesetzt werden und wie eine Maschinen- und Bauteilreinigung aussieht.   A machining process is mostly used as a last step in the production of workpieces made of CFRP. In this machining process lubricants may be used or dry cutting processes are applicated. The here presented study shows for dry machining processes, which technologies are used for the dust and chip extraction. Furthermore, the techniques for the cleaning of the machine, the clamping system and workpiece are presented.

Wear Behavior in Wire of Wire Cut EDM

2014 ◽  
Vol 704 ◽  
pp. 70-76
Author(s):  
Ruma Sen ◽  
P. Charkraborti ◽  
J. Debbarma
Keyword(s):  
Electrical Discharge Machining ◽  
Wear Behavior ◽  
Machining Process ◽  
Machining Processes ◽  
Wire Tension ◽  
Complex Shapes ◽  
Sharp Edges ◽  
Pulse On Time ◽  
Wedm Process ◽  
Wire Feed

Wire electrical discharge machining (WEDM) is a specialized thermal machining process, capable of accurately machining parts with different hardness, complex shapes and sharp edges that are very difficult to be machined by the traditional machining processes. The practical technology of the WEDM process is based on the conventional EDM sparking phenomenon utilizing the widely accepted noncontact technique of material removal.In this paper, the effects of various process parameters of WEDM like pulse on time (Ton), peak current (IP), wire feed (WF) and wire tension (WT) have been investigated to study their impact on wear of wire of ELECTRONICA SPRINTCUT WEDM machine.It is found that the wear is influenced with increase in pulse on time (Ton) and wire tension.

Results of an Experimental Research Concerning the Evaluation of Machinability by Drilling under Constant Feed Force

2015 ◽  
Vol 809-810 ◽  
pp. 147-152 ◽  
Author(s):  
Vasile Manole ◽  
Laurenţiu Slătineanu ◽  
Sergiu Constantin Olaru ◽  
Irina Beşliu ◽  
Pavel Iurea ◽  
...  
Keyword(s):  
Machining Process ◽  
Normal Operation ◽  
Time Interval ◽  
Experimental Setup ◽  
Machining Processes ◽  
Drilling Tool ◽  
Feed Force ◽  
Machining Operations ◽  
Tool Diameter ◽  
The Impact

The knowledge about machinability indices for distinct machining processes allows finding the most appropriate values of the relevant factors for definite machining operations. Several criteria can be used to characterize machinability, such as the tool wear, the magnitude of the cutting forces, the roughness of the machined surfaces, or the shape of the chips that are formed during the machining process. One of the methods for studying the machinability is based on the analysis of drilling operations that are made under constant feed force. A drill press is probably the most readily available device to implement an experimental setup for drilling machinability tests. In normal operation, however, the chip accumulation at the dead end of the machined hole has a detrimental impact on the results of machinability tests, so that an improved setup was designed. A two-level, full factorial experiment with three independent factors (the drilling tool diameter, the rotational speed of the spindle and the feed force) has proven the suitability of the new experimental setup. Using it, we could find a power-type empirical model that explains the impact of the input factors in the depth of a hole that is machined in a pre-defined time interval.

Numerical-Experimental Correlation of Distortions Induced by Machining Process on Thin-Walled Nickel Super Alloy Forged Components

2012 ◽  
Vol 504-506 ◽  
pp. 1299-1304 ◽  
Author(s):  
Antonio del Prete ◽  
Antonio Alberto de Vitis ◽  
Rodolfo Franchi
Keyword(s):  
Numerical Models ◽  
Model Development ◽  
Aircraft Engine ◽  
Machining Process ◽  
Work Piece ◽  
Machining Processes ◽  
Thin Walled ◽  
Main Components ◽  
Machining Operations

AeroEngines main components made by nickel super alloys are mainly obtained by machining of large forged components. The work piece machining process generates some distortions that may also be relevant. In this contest, in many cases the removed volume in the machining operations represents a large percentage of the forged component in order to obtain the thin-walled wanted geometry. Due to this reason, the residual bulk stresses induced by the process history can lead to significant 3D geometric distortions in the machined component with unacceptable dimensions and shapes of the obtained product for comparison with the wanted geometry. Moreover, it is a matter of fact how, the final component distortions depend by the cutting strategy adopted in the machining process. The experimental study of such cutting strategies on real components are particularly time consuming and costly and for this reason the chance to study the problem using reliable numerical models it is particularly welcome. In the present work authors reports the numerical model development of the forging and machining processes needed for the production of a aircraft engine component and the comparison of the obtained results with the ones physically measured. The objective is to develop and validate a modeling method able to predicts the shape and the magnitude of the distortion induced by the machining operation on the considered component and to establish a possible strategy to suggest machining working steps able to improve the quality of the manufactured component reducing the needed production time.

Part Dimensional Error and Its Propagation Modeling in Multi-Operational Machining Processes

2003 ◽  
Vol 125 (2) ◽  
pp. 255-262 ◽  
Author(s):  
Qiang Huang ◽  
Jianjun Shi ◽  
Jingxia Yuan
Keyword(s):  
State Space Model ◽  
Machining Process ◽  
Kinematic Modeling ◽  
Machining Processes ◽  
Dimensional Error ◽  
Physical Relationship ◽  
Modeling And Control ◽  
Propagation Modeling ◽  
Variation Propagation ◽  
Machining Operations

In a multi-operational machining process (MMP), the final product variation is an accumulation or stack-up of variation from all machining operations. Modeling and control of the variation propagation is essential to improve product dimensional quality. This paper presents a state space model and its modeling strategies to describe the variation stack-up in MMPs. The physical relationship is explored between part variation and operational errors. By using the homogeneous transformation approach, kinematic modeling of setup and machining operations are developed. A case study with real machined parts is presented in the model validation.

Recent Developments in Wire Electrical Discharge Machining

2019 ◽  
pp. 125-152
Author(s):  
Nadeem Faisal ◽  
Sumit Bhowmik ◽  
Kaushik Kumar
Keyword(s):  
Electrical Discharge ◽  
Electrical Discharge Machining ◽  
Electrical Discharge Machine ◽  
High Strength ◽  
Optimization Methods ◽  
Machining Process ◽  
Machining Processes ◽  
Accuracy And Precision ◽  
Recent Developments ◽  
Conventional Machining

The tremendous growth of manufacturing industries and desired need of accuracy and precision has put a great importance on non-traditional machining processes. Metal and non-metals having properties like high strength, toughness, and hardness is generally machined by non-conventional machining methods. One of earliest non-traditional machining that is still in use and being effectively utilized in industries is wire electrical discharge machine. This machining technique gives a tough line of competition to conventional machining process like milling, grinding, broaching, etc. Cutting intricate and delicate shapes with accuracy and precision gives this machining technique an edge over other conventional machining and non-conventional machining processes. This chapter provides an insight to various research and prominent work done in field of WEDM by various scientists, researchers, and academicians. The chapter also emphasizes various advantages and disadvantages of different modelling and optimization methods used. The chapter concludes with some recommendations about trends for future WEDM researchers.

A Meta Knowledge Base for Machining Process Selection

1991 ◽  
Author(s):  
Jami J. Shah ◽  
David W.-C. Hsiao
Keyword(s):  
Knowledge Base ◽  
Machining Process ◽  
Process Selection ◽  
Design Features ◽  
Machining Processes ◽  
Design And Manufacturing ◽  
Manufacturing Applications ◽  
Machining Operations ◽  
Manufacturability Evaluation ◽  
Manufacturing Features

Abstract The work reported here is part of a larger project aimed at developing a system for concurrent design and manufacturing. One of the manufacturing applications is manufacturability evaluation performed on design models based on features. The model is not restricted to a limited set of predefined features, but can contain user-defined features that the application program, such as the Manufacturability Evaluator, has no prior knowledge of. A methodolgy was developed whereby the manufacturability evaluator could understand design features from a manufacturing viewpoint and automonously generate feasible machining process sequences for undocumented features. This requires that the system decompose design features into some generic fundamental terms and compare this representation to the capabilities of common machining operations. Therefore, the system needs deeper knowledge about machining processes than that afforded by production rules. In our method, undocumented features are partially evaluated to derive the faces intersecting at concave edges. An algorithm is developed to organize these faces into manufacturing features. The meta knowledge base captures the fundamental characteristics of a machining process by its elementary producible volume and the limitations of tool motions. This representation enables the manufactuability evaluator to create alternative machining sequences for undocumented features.

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.

Sign in / Sign up

Export Citation Format

Share Document