Results 21 to 30 of about 4,164 (236)

A Novel Unsupervised Machine Learning-Based Method for Chatter Detection in the Milling of Thin-Walled Parts

Sensors, 2021
Data-driven chatter detection techniques avoid complex physical modeling and provide the basis for industrial applications of cutting process monitoring.
Runqiong Wang, Qinghua Song, Zhanqiang Liu, Haifeng Ma, Munish Kumar Gupta, Zhaojun Liu   +5 more
doaj   +1 more source

Chatter in manufacturing system: Prediction and detection [PDF]

Tehnika
Chatter is a phenomenon that periodically occurs in machining systems. Its occurrence in machining processes excites the tool and other elements of the machining system, creating "chatter marks" on the workpiece surface, which affects the quality of the ...
Vorkapić Nikola M., Kokotović Branko M., Živanović Saša T.   +2 more
doaj   +1 more source

An Efficient Third-Order Full-Discretization Method for Prediction of Regenerative Chatter Stability in Milling

Shock and Vibration, 2020
The prediction of regenerative chatter stability has long been recognized as an important issue of concern in the field of machining community because it limits metal removal rate below the machine’s capacity and hence reduces the productivity of the ...
Chao Huang, Wen-An Yang, Xulin Cai, Weichao Liu, YouPeng You   +4 more
doaj   +1 more source

Chatter identification in turning process based on vibration analysis using Hilbert-Huang transform

Journal of Mechanical Engineering and Sciences, 2020
In machining process, the increasing cutting depth is aimed to accelerate machining operations in a short time. However, the increasing cutting depth can cause chatter vibration at any time.
Agus Susanto, K. Yamada, R. Tanaka, Y. A. Handoko, M. F. Subhan   +4 more
doaj   +1 more source

Chatter Vibration Comparison Between Normal Helix Angle and Variable Helix Angle in End Milling Process Based on Spectrum Analysis

Rekayasa Mesin, 2020
Chatter vibration in machining processes is often found in cutting processes which will decrease the machining efficiency and the surface quality of the products. Chatter is a relative vibration of the cutting tool and workpiece caused by the fluctuation
Achmad As'ad Sonief, Arda Nur Fauzan, Fachry Azlan, Muhammad Aziz Bashori   +3 more
doaj   +1 more source

Real-Time Milling Chatter Detection and Control with Axis Encoder Feedback and Spindle Speed Manipulation

Journal of Manufacturing and Materials Processing
This paper introduces a complete real-time algorithm, where the chatter is detected and eliminated by spindle speed manipulation via the chatter energy feedback calculated from the axis encoder measurement.
Hakan Çalışkan
doaj   +1 more source

Influence of Chatter of VMC Arising During End Milling Operation and Cutting Conditions on Quality of Machined Surface

International Islamic University Malaysia Engineering Journal, 2012
Machine tool chatter is a dynamic instability of the cutting process. Chatter results in poor part surface finish, damaged cutting tool, and an irritating and unacceptable noise.
A.K.M.N. Amin, M.A. Rizal, and M. Razman
doaj   +1 more source

Chatter Detection in Robotic Milling Using Entropy Features

Applied Sciences, 2022
Chatter detection in robotic milling is a difficult issue due to the complex dynamic behavior of robots. In this paper, a novel approach to detecting chatter in the robotic milling process is proposed.
Bin Yang, Kai Guo, Jie Sun
doaj   +1 more source

A Study on Bistability Analysis and Chatter Suppression for Roll Grinding Process

Journal of Applied Science and Engineering, 2021
As chatter vibration in the roll grinding process is the largest limitation in the surface quality of the machined roll. In this paper, the bistability analysis and chatter suppression are performed for further discussion of patterns of the grinding ...
Duo Yang, Tianding Chen, Chengfei Rao
doaj   +1 more source

Integrative Omics Analysis Reveals the Regulation of Hypoxia Tolerance in Large Yellow Croaker (Larimichthys crocea) via the Lipoic Acid Synthase (lias) Gene

Advanced Science, EarlyView.
Lipoic acid synthase (lias) can regulate α‐KG levels through lipoylation, thereby negatively regulating HIF‐1α protein levels via PHD under hypoixa. The Hap2 allele of lias exhibits lower expression levels than Hap1, leading to the accumulation of more HIF‐1α protein and thereby enhancing hypoxia tolerance. ABSTRACT Hypoxia stress seriously affects the
Jie Ding, Songpeng Jia, Ran Meng, Xuelei Wang, Xiongfei Wu, Weiliang Shen, Yibo Zhang, Junquan Zhu   +7 more
wiley   +1 more source