The Friction Effects for Contact Force Analysis of Three Axes CNC Machine Tool

2017 ◽  
Vol 739 ◽  
pp. 12-17
Author(s):  
Yunn Lin Hwang ◽  
Thi Na Ta ◽  
Jung Kuang Cheng
Keyword(s):  
Machine Tool ◽  
Contact Force ◽  
Dynamic Structure ◽  
Cnc Machine Tool ◽  
Force Analysis ◽  
Dynamic Effects ◽  
Cnc Machine ◽  
Efficient Simulation ◽  
Machine Tool Structure ◽  
Inertia Forces

In this paper, the influence of friction on static, dynamic characteristics, the strength and lifetime of a 3-axes flexible CNC machine tool are taken into account. The machine tool is first modelled by using finite element method (FEM) to perform static structural analysis. After that, the dynamic effects caused by the inertia forces and the displacement of moving part of the machine on contact stress are considered in this study. Then, the stress and contact force distributions on solid-flexible contact are also obtained. Finally, the influence of dynamic structure, cutting conditions and material properties on strength and lifetime of CNC machine tool are discussed by using fatigue analysis. Consequently, the proposed method can be used for efficient simulation of structural dynamics, lifetime assessment as well as interactions of the real CNC machine with the machine tool structure in a virtual environment.

The friction effects for contact force analysis of three-axes CNC machine tool

2018 ◽  
Vol 70 (8) ◽  
pp. 1527-1535 ◽  
Author(s):  
Yunn-Lin Hwang ◽  
Thi-Na Ta
Keyword(s):  
Machine Tool ◽  
Dynamic Characteristics ◽  
Dynamic Structure ◽  
Contact Forces ◽  
Numerical Control ◽  
Cnc Machine Tool ◽  
Cnc Machine ◽  
Static Structure ◽  
Content Type ◽  
Machine Tool Structure

Purpose The purpose of this paper is to study the influence of friction on static and dynamic characteristics, as well as the strength and lifetime of a flexible three-axes computer numerical control (CNC) machine tool. Design/methodology/approach The machine tool is first modeled by using finite element method to analyze static structure with frictionless surface-to-surface contact type. Because the machine tool structure is becoming more and more sophisticated over time, the significant influence of contact conditions between structural elements on the dynamic characteristics of the whole structure must be considered. To examine the dynamic effects caused by inertia forces and displacement of moving bodies on contact stress, the coefficient of friction between two contact bodies is added to perform dynamic simulation and compare the results with the static analysis results. Findings Distribution of stress and contact forces in solid-flexible contact is also studied by using the fundamental dynamic characteristics of a bushing joint. Originality/value Finally, the influence of dynamic structure, cutting conditions and material properties on the strength and lifetime of the CNC machine tool is discussed by using fatigue analysis. Consequently, this research can be used for efficient simulation of structural dynamics, lifetime assessment and interactions of the real CNC machine with the machine tool structure in a virtual environment.

Researches Regarding the Use of Fuzzy Controllers within CNC Feed Drives

2015 ◽  
Vol 772 ◽  
pp. 229-234
Author(s):  
Radu Eugen Breaz ◽  
Octavian Bologa
Keyword(s):  
Machine Tool ◽  
Fuzzy Controller ◽  
Cnc Machine Tool ◽  
Cnc Machine ◽  
Fuzzy Controllers ◽  
Feed Drive ◽  
Feed Drives ◽  
Simulation Based ◽  
Position Controller ◽  
Dc Servomotor

This paper presents some simulation based upon a dynamic model of a feed-drive within the structure of a CNC machine tool. A DC servomotor was considered as actuation device for the feed drive. For a given set of parameters for the position controller, two fuzzy types of fuzzy controllers were tested by means of simulation. The first fuzzy controller was a proportional one, with one input and one output, while the second one was a two variables one, with two inputs and one outputp.

Application of Ubiquitous Sensor Network in Collection and Analysis of CNC Machine Tool Processing Status Information

2010 ◽  
Vol 455 ◽  
pp. 621-624
Author(s):  
X. Li ◽  
Y.Y. Yu
Keyword(s):  
Machine Tool ◽  
Sensor Network ◽  
Machine Tools ◽  
Thermal Error ◽  
Development Trend ◽  
Cnc Machine Tools ◽  
Cnc Machine Tool ◽  
Cnc Machine ◽  
Status Information ◽  
The Development Trend

Because of the practical requirement of real-time collection and analysis of CNC machine tool processing status information, we discuss the necessity and feasibility of applying ubiquitous sensor network(USN) in CNC machine tools by analyzing the characteristics of ubiquitous sensor network and the development trend of CNC machine tools, and application of machine tool thermal error compensation based on USN is presented.

scholarly journals Decision-making Tool for Moving from 3-axes to 5-axes CNC Machine-tool

2016 ◽  
Vol 91 ◽  
pp. 184-192 ◽  
Author(s):  
Octavian Bologa ◽  
Radu-Eugen Breaz ◽  
Sever-Gabriel Racz ◽  
Mihai Crenganiş
Keyword(s):  
Decision Making ◽  
Machine Tool ◽  
Cnc Machine Tool ◽  
Cnc Machine ◽  
Decision Making Tool
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