scholarly journals Face rotary turning tools (FRTT) in high productivity process

Mechanik ◽  
2019 ◽  
Vol 92 (11) ◽  
pp. 736-738
Author(s):  
Janusz Cieloszyk
Keyword(s):  
Machining Processes ◽  
High Productivity ◽  
Productivity Process ◽  
Unconventional Method ◽  
Simple Models

The article presents an unconventional method of machining rolling surfaces. This method is called face rotary turning tools (FRTT) or spinning tools technology. Advantages and limitations of the method were discussed and its effectiveness in modern machining processes was shown, based on the proposed simple models.

scholarly journals Influence of High-Productivity Process Parameters on the Surface Quality and Residual Stress State of AISI 316L Components Produced by Directed Energy Deposition

2021 ◽  
Author(s):  
Gabriele Piscopo ◽  
Alessandro Salmi ◽  
Eleonora Atzeni
Keyword(s):  
Surface Roughness ◽  
Residual Stresses ◽  
Surface Quality ◽  
Process Parameters ◽  
Energy Deposition ◽  
Industrial Applications ◽  
High Productivity ◽  
Directed Energy Deposition ◽  
Productivity Process ◽  
Directed Energy

AbstractThe production of large components is one of the most powerful applications of laser powder-directed energy deposition (LP-DED) processes. High productivity could be achieved, when focusing on industrial applications, by selecting the proper process parameters. However, it is of crucial importance to understand the strategies that are necessary to increase productivity while maintaining the overall part quality and minimizing the need for post-processing. In this paper, an analysis of the dimensional deviations, surface roughness and subsurface residual stresses of samples produced by LP-DED is described as a function of the applied energy input. The aim of this work is to analyze the effects of high-productivity process parameters on the surface quality and the mechanical characteristics of the samples. The obtained results show that the analyzed process parameters affect the dimensional deviations and the residual stresses, but have a very little influence on surface roughness, which is instead dominated by the presence of unmelted particles.

Mining manufacturing data for discovery of high productivity process characteristics

2010 ◽  
Vol 147 (3-4) ◽  
pp. 186-197 ◽  
Author(s):  
Salim Charaniya ◽  
Huong Le ◽  
Huzefa Rangwala ◽  
Keri Mills ◽  
Kevin Johnson ◽  
...  
Keyword(s):  
High Productivity ◽  
Process Characteristics ◽  
Productivity Process ◽  
Manufacturing Data

Multiobjective Optimization of Milling Tool Geometry for Chatter Suppression and Productivity Improvement

2012 ◽  
Vol 445 ◽  
pp. 21-26 ◽  
Author(s):  
Ahmad Razlan Yusoff ◽  
Mohd Firdaus Hassan ◽  
Muhammad Hatifi Mansor
Keyword(s):  
Multiobjective Optimization ◽  
Material Removal Rate ◽  
Material Removal ◽  
Removal Rate ◽  
Tool Geometry ◽  
Machining Processes ◽  
Front Solution ◽  
High Productivity ◽  
Excited Vibration ◽  
Machining Productivity

In this paper, productivity and self-excited vibration are simultaneously optimized using multiobjective optimization in cutting process. At high material removal rate, machining processes accelerates tool wear, poor surface finish and failure of machine parts. The effect of self-excited vibration or chatter prevents high machining productivity. This chatter vibration can be avoided by modifying tool geometry at low material removal rate but not at high productivity. To compensate material removal rate and chatter, multiobjective optimization is applied using ε-constraint algorithm to achieve a Pareto front solution. Differential Evolution as intelligent optimization algorithm is shown better results than traditional technique of Sequential Quadratic Programming.

Analytical Chatter Stability Prediction for Irregular Types of Milling Tools

2013 ◽  
Vol 773-774 ◽  
pp. 420-426
Author(s):  
Ahmad Razlan Yusoff ◽  
Muhammad Hatifi Mansor ◽  
Hazami Che Hussain ◽  
Muhammad Azwan Zainol Abidin
Keyword(s):  
Removal Rate ◽  
Low Cost ◽  
Work Piece ◽  
Chatter Stability ◽  
Machining Processes ◽  
High Productivity ◽  
Helix Pitch ◽  
Variable Helix ◽  
Milling Tools ◽  
Chatter Stability Prediction

High productivity, low cost and high profits in machining processes is important aspects in aerospace, automotive and tool/die metal manufacturing industries. However, the dynamic deflection of tool and work piece systems generates unstable cutting forces when machining with high material removal rate. The main focus of this paper is the study of variable tool geometries effect on chatter stability. A semi discretization method (SDM) was utilized to predict numerical chatter using variable helix, pitch and variable helix and pitch tools effect at high radial immersion. The results showed that variable helix and variable pitch milling tools exhibit better unstable behavior at 25 percent radial immersion.

scholarly journals Improving machinability of additively manufactured components with selectively weakened material

2021 ◽  
Author(s):  
Clemens Maucher ◽  
Heiko Teich ◽  
Hans-Christian Möhring
Keyword(s):  
Cutting Forces ◽  
Bulk Material ◽  
Layer By Layer ◽  
Post Processing ◽  
Machining Processes ◽  
Powder Bed ◽  
High Productivity ◽  
Process Characteristics ◽  
Material Efficiency ◽  
Wide Range

AbstractPart design and the possibilities of production are disrupted by the increased usage of additive manufacturing (AM). Featuring excellent creative freedom due to the layer-by-layer buildup of components, AM leads to profound changes in future part design and enables previously impossible geometries. Laser powder bed fusion (LPBF) technology already allows to manufacture small quantities of parts with high productivity and material efficiency. Due to the specific process characteristics, the resulting surface finish of these parts is insufficient for a wide range of applications, and post-processing is usually unavoidable. Specifically for functional surfaces, this post-processing is often done by machining processes, which can pose challenges for intricate and complex AM parts due to excessive machining forces. In the present paper, the influence and the possibilities of the LPBF process parameters on the subtractive post-processing are shown. A novel weakened structure is developed to selectively reduce the strength of the material and improve the cutting conditions. Chip formation, cutting forces and vibrations during drilling as well as cutting forces during an orthogonal cut are examined. To quantify the differences, a comparison of the machinability between bulk material, standard support structures and the weakened structure is carried out.

Effects of Cutting Fluid Application in the Performance of the Nimomic 80A Turning

2015 ◽  
Vol 656-657 ◽  
pp. 243-250 ◽  
Author(s):  
Renann Pereira Gama ◽  
Marcos Valério Ribeiro
Keyword(s):  
High Performance ◽  
Technological Development ◽  
Cutting Speed ◽  
Global Market ◽  
Cutting Fluid ◽  
Machining Parameters ◽  
Machining Processes ◽  
Machine Material ◽  
High Productivity ◽  
Chip Removal

The increase of world requirements for improved products joined to growing competition between companies in the global market makes the same seek processes that ensure lower costs allied to high productivity and high quality product. Therefore, the great industrial and technological development has been increased the search for machining processes that promote, for example, high performance as regards the chip removal, less tool wear, failure and reduced impact on the environment. Regarding nickel-based superalloys, they have an extremely important role in the aeronautical and automotive industries among others. The nickel-based superalloy studied is the Nimonic 80A, hard machine material that has high mechanical strength and corrosion resistance on higher temperatures. The objective of this report is to study the influence of the application of cutting fluids in turning and the machining parameters in order to achieve high performance and optimization of machining this alloy. This one was machined using various machining parameters: cutting speed, feed rate, cutting depth, Minimum Quantity fluid (MQF), and Fluid abundant. After turning chip samples were obtained, was measured the surface roughness, volume of chip removed, cutting length and macro structural, some analyzes were performed and of lifetime of the tools were used in order to detect possible wear, as well as, microstructural observation of the chips by optical microscopy, scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS).On this report, we can observe the behavior of the materials and tools in the two cooling conditions used, and also, the impacts of the parameter variations in the surface finish, on the structure of the material and performance of the tools in respect chip removal regarding volume removed and machined length. Application by MQF was promising, but there is an abundant beyond the traditional application.

New Non Conductive Film for high productivity process

2015 ◽  
Author(s):  
Kazuyuki Matsumura ◽  
Masao Tomikawa ◽  
Yohei Sakabe ◽  
Yoichi Shiba
Keyword(s):  
High Productivity ◽  
Conductive Film ◽  
Productivity Process

scholarly journals Experimental Study on the Sustainability Assessment of AWJ Machining of Ti-6Al-4V Using Glass Beads Abrasive Particles

2021 ◽  
Vol 13 (16) ◽  
pp. 8917
Author(s):  
Nikolaos E. Karkalos ◽  
Panagiotis Karmiris-Obratański ◽  
Rafał Kudelski ◽  
Angelos P. Markopoulos
Keyword(s):  
Sustainability Assessment ◽  
Experimental Studies ◽  
Glass Beads ◽  
Abrasive Waterjet ◽  
Machining Processes ◽  
Depth Of Penetration ◽  
High Productivity ◽  
Abrasive Waterjet Machining ◽  
Waterjet Machining ◽  
Environmentally Friendly Process

Abrasive Waterjet Machining (AWJM) is considered a viable alternative to conventional machining processes, due to its capability of rendering even complex features on parts with high productivity. However, it is currently also important for manufacturing processes to comply with the various aspects of sustainability, by putting emphasis on the environmental dimension apart from the economic. Although AWJM generally is considered an inherently environmentally friendly process, it is required that thorough experimental studies be carried out to evaluate the sustainability of AWJM under various conditions. In the present work, AWJM experiments under various conditions were conducted on a Ti-6Al-4V workpiece in order to determine the optimal conditions leading to a high degree of sustainability in this process based on several indicators. The experiments were carried out using glass beads, which act as an eco-friendly abrasive. After the basic outcome of the experiment was analyzed to determine the correlations between process parameters and depth of penetration, kerf width, and kerf taper angle, sustainability analysis with the aid of Grey Relational Analysis (GRA) was conducted. The optimum solution provided a sufficiently high score regarding both the economic and environmental dimensions of sustainability.

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