Results 31 to 40 of about 88,069 (311)

5-axes modular CNC machining center

MATEC Web of Conferences, 2017
The paper presents the development of a 5-axes CNC machining center. The main goal of the machine was to provide the students a practical layout for training in advanced CAM techniques.
Breaz Radu-Eugen, Racz Sever-Gabriel, Bologa Octavian-Constantin   +2 more
doaj   +1 more source

Investigating dynamics of machine tool spindles under operational conditions [PDF]

, 2011
Chatter is one of the major problems in machining and can be avoided by stability diagrams which are generated using frequency response functions (FRF) at the tool tip.
Budak, Erhan, Ozguven, Nevzat H., Ozsahin, Orkun, Özgüven, Nevzat H., Özşahin, Orkun   +4 more
core   +1 more source

Trajectory error estimation to circular arc interpolation cutter path of machining center due to acceleration/deceleration motions of interpolation segments

Nihon Kikai Gakkai ronbunshu, 2019
From the machining center (MC) user’s point of view, the author proposes a practical approach to estimating the trajectory errors of a circular arc interpolation cutter path produced by the NC servo characteristics for a target MC in this paper. Firstly,
Hua QIU
doaj   +1 more source

A Study on 4-Axis Turning for Non-Axisymmetric 3D Surfaces - Creation of high-precision curved surfaces by synchronizing the spindle and rotary tool axis-

Nihon Kikai Gakkai ronbunshu, 2023
A machining center is a common machine tool that can machine complex free-form surfaces such as the press mold, automobile’s cam profile. When these curved surfaces are machined by the conventional machining center and/or the grinding machine, it takes ...
Yoshitaka MORIMOTO, Narimasa UEDA, Shion HAMANO, Akio HAYASHI   +3 more
doaj   +1 more source

Displacements analysis of self-excited vibrations in turning

, 2009
The actual research deals with determining by a new protocol the necessary parameters considering a three-dimensional model to simulate in a realistic way the turning process on machine tool.
A Cowley, A Moufki, Alain Gérard, AV Dassanayake, C Mei, CF Bisu, CK Chen, Claudiu F. Bisu, DA Axinte, DE Dimla Sr, HE Merrit, I Marinescu, IN Tansel, JD Calderon-Najera, Jean-Yves K’nevez, K Liu, LZ Qiang, M Thomas, O Cahuc, O Cahuc, PG Benardos, Philippe Darnis, RL Kegg, W Grzeski, X Li, Y Sahin, YS Chiou   +26 more
core   +1 more source

A methodology for the lightweight design of modern transfer machine tools [PDF]

, 2018
This paper deals with a modern design approach via finite elements in the definition of the main structural elements (rotary table and working unit) of an innovative family of transfer machine tools. Using the concepts of green design and manufacture, as
Cavalli, Omar, Croccolo, Dario, De Agostinis, Massimiliano, Fini, Stefano, Olmi, Giorgio, Robusto, Francesco, Vincenzi, Nicol\uf2   +6 more
core   +2 more sources

Estimating temperature distribution and heat quantity of spindle shaft for machining centers

Journal of Advanced Mechanical Design, Systems, and Manufacturing
The thermal issue of spindles for machining centers is still fundamentally unresolved. Thermal problems due to increased temperature of the spindle shaft lead to thermal displacement of the tool axis and an increase in friction torque, consequently ...
Shingo KAJIKAWA, Sho MORITA, Hiroshi USUKI, Naohiko SUGITA   +3 more
doaj   +1 more source

Stiffness-Oriented Placement Optimization of Machining Robots for Large Component Flexible Manufacturing System

Machines, 2022
A large component flexible manufacturing system provides more application scenarios for industrial robots, and, in turn, these robots exhibit competitive advantages in machining applications. However, the structural characteristic of low stiffness is the
Yuan Xue, Zezhong Sun, Shiwei Liu, Dong Gao, Zefan Xu   +4 more
doaj   +1 more source

Analysis of the Machining Process of Titanium Ti6Al-4V Parts Manufactured by Wire Arc Additive Manufacturing (WAAM) [PDF]

, 2020
In the current days, the new range of machine tools allows the production of titanium alloy parts for the aeronautical sector through additive technologies.
Alonso, Unai, Gil Del Val, Alain, Suárez, Alfredo, Veiga, Fernando   +3 more
core   +2 more sources

Mapping the evolution of mitochondrial complex I through structural variation

FEBS Letters, EarlyView.
Respiratory complex I (CI) is crucial for bioenergetic metabolism in many prokaryotes and eukaryotes. It is composed of a conserved set of core subunits and additional accessory subunits that vary depending on the organism. Here, we categorize CI subunits from available structures to map the evolution of CI across eukaryotes. Respiratory complex I (CI)
Dong‐Woo Shin, Tingting Chen, James A. Letts   +2 more
wiley   +1 more source