Genetic Optimization for the Design of a Machine Tool Slide Table for Reduced Energy Consumption

2021 ◽  
Vol 143 (10) ◽  
Author(s):  
Matthew J. Triebe ◽  
Fu Zhao ◽  
John W. Sutherland
Keyword(s):  
Genetic Algorithm ◽  
Finite Element ◽  
Energy Consumption ◽  
Machine Tool ◽  
Machine Tools ◽  
Sandwich Panel ◽  
Sustainable Manufacturing ◽  
Element Model ◽  
Genetic Optimization ◽  
Use Phase

Abstract Reducing the energy consumption of machine tools is important from a sustainable manufacturing perspective. Much of a machine tool’s environmental impact comes from the energy it consumes during its use phase. To move elements of a machine tool requires energy, and if the mass of those elements can be reduced, then the required energy would be reduced. Therefore, this paper proposes a genetic algorithm to design lightweight machine tools to reduce their energy consumption. This is specifically applied to optimize the structure of a machine tool slide table, which moves throughout the use of the machine tool, with the goal of reducing its mass without sacrificing its stiffness. The table is envisioned as a sandwich panel, and the proposed genetic algorithm optimizes the core of the sandwich structure while considering both mass and stiffness. A finite element model is used to assess the strength of the proposed designs. Finite element results indicate that the strength of the lightweight tables is comparable with a traditional table design.

A Structure Analysis Method for Machine Tools Based on Assembly Relationship

2010 ◽  
Vol 29-32 ◽  
pp. 2443-2448
Author(s):  
Dong Fang Hu ◽  
Yan Li ◽  
Jian Dong Shang
Keyword(s):  
Finite Element ◽  
Machine Tool ◽  
Machine Tools ◽  
Element Model ◽  
Joint Surface ◽  
Analysis Method ◽  
Element Analysis ◽  
Set Up ◽  
Relationship Of ◽  
Tool Assembly

Considering the nonlinear relationship of the joint surface between parts in machine tool assembly, a finite element analysis method based on assembly relationship is proposed. By this method, a finite element model is set up. Based on the analysis of experimental data, the result is close to the actual working conditions, which proves that this analysis method based on the machine tool assemble relationship is feasible and reliable

FE-basierte Optimierung von mehrachsigen Antriebssystemen*/FE-based optimization of multi-axis systems

2018 ◽  
Vol 108 (05) ◽  
pp. 284-288
Author(s):  
W. Herfs ◽  
S. Kehne ◽  
A. Epple
Keyword(s):  
Finite Element ◽  
Machine Tool ◽  
Machine Tools ◽  
Feed Forward ◽  
Finite Elemente

Die Auslegung von Vorschubantrieben in Werkzeugmaschinen ist zu meist ein sehr fehleranfälliger Prozess, da es schwierig ist, abzuschätzen, wie sich die Maschine unter Belastung dynamisch verhält. Diese Veröffentlichung stellt einen Finite-Elemente-basierten Ansatz vor, wie eine Antriebsregelung in eine Mehrkörpersimulation integriert werden kann und wie das Zusammenspiel von zwei Antrieben im Prozess simuliert und optimiert werden kann.   The design of feed forward drives in machine tools is frequently an error-prone process, because it is difficult to estimate how the machine tool acts dynamically during processing. This publication introduces a new finite-element-based approach that integrates axis controllers and is able to simulate and optimize the multi-axis behavior of two axes in a process.

Substructure Coupling of a Machine Tool in Arbitrary Axis Positions Considering Local Linear Damping Models

2019 ◽  
Vol 141 (7) ◽  
Author(s):  
Thomas Semm ◽  
Michael B. Nierlich ◽  
Michael F. Zaeh
Keyword(s):  
Finite Element ◽  
Machine Tool ◽  
Dynamic Behavior ◽  
Element Model ◽  
Damping Behavior ◽  
Linear Damping ◽  
Virtual Prototypes ◽  
Damping Effects ◽  
Stiffness And Damping ◽  
Arbitrary Axis

Virtual prototypes, e.g., finite element models, are commonly used to reduce the development times of a new machine tool generation. However, the accuracy of these models is often limited by their representation of damping effects and the possibility to efficiently simulate the dynamic behavior in different axis positions. This paper shows the changing local damping distribution within a single-axis machine tool configuration for different axis positions. Based on this investigation, an approach to accurately model the position-dependent dynamics, while keeping the calculation times small, is presented. The virtual model of the machine is divided in several substructures, which consider the local damping behavior of each dissipation source. The reduced mass, stiffness, and damping matrices are coupled in the desired machine position by using multipoint constraints, which are generated at the desired machine position after the reduction of the substructures. Four different approaches to apply multipoint constraints on reduced substructures are compared, followed by an investigation of their influencing parameters. The most promising approach is compared with a model without local damping representation as well as a model without substructuring. By considering the local damping effects within the finite element model and coupling the reduced models of each component in arbitrary axis positions, an efficient analysis and optimization of the dynamic behavior of a machine tool over the whole workspace can be conducted.

Performance assessment of rigid polyurethane foam core sandwich panels under blast loading

2019 ◽  
Vol 11 (1) ◽  
pp. 109-130 ◽  
Author(s):  
Hosein Andami ◽  
Hamid Toopchi-Nezhad
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Polyurethane Foam ◽  
Sandwich Panel ◽  
Sandwich Panels ◽  
Element Model ◽  
Polyurethane Foams ◽  
Compression Tests ◽  
Foam Layer ◽  
The Finite Element Model

The performance of rigid polyurethane foams, as an energy absorbent core of sandwich panels covered with two exterior steel sheets, was investigated numerically through finite element methods. After verifying the finite element model, numerical studies were conducted to investigate the role of thickness and density of the foam layer in the response behavior of sandwich panels under blast loads. A set of cylindrical polyurethane foam specimens were manufactured at five different nominal densities, 90, 140, 175, 220, and 250 kg/m3, and their stress–strain curves were evaluated using uniaxial compression tests. The test data were then employed to define characteristics of the polyurethane foams in the finite element model. Based on the results of finite element analysis runs, the optimum density of the foam layer was determined by assessing two response parameters including the peak pressure transmitted to the back face of the foam layer and the maximum deflection of sandwich panel. These response parameters were found to be affected differently by variations in the density of the foam layer within the panel. An increase in the thickness of the foam layer, to a certain extent, was found to be beneficial to the mitigation capability of sandwich panel.

Finite Element Analysis for Static Behaviour of the CNC Turning Machine Spindle

2014 ◽  
Vol 555 ◽  
pp. 555-560 ◽  
Author(s):  
Doru Bardac ◽  
Constantin Dogariu
Keyword(s):  
Finite Element ◽  
Machine Tool ◽  
High Speed ◽  
High Performance ◽  
Element Model ◽  
Design Activity ◽  
Element Analysis ◽  
Spindle System ◽  
Machine Spindle ◽  
Main Spindle

This paper presents a method to investigate the characteristics of a turning high-speed spindle system. The geometric quality of high-precision parts is highly dependent on the performance of the entire machining system,especially by the main spindle behaviour. The machine tool main spindle units is focused on direct driven spindle units for high-speed and high performance cutting. This paper analyzes the static behavior for a turning machine spindle and presents some activities to improve the CAD model for such complex systems. The proposed models take into account the spindle with the detailed bearing system. The analysis was performed during the design activity and was based on Finite Elements Method. Starting from the 3D designed model, using FEM done by means of ANSYS analysis the structure stiffness was evaluated and, by consequence, the influence on the machine tool precision. The aim of this paper is to develop a finite element model of the machine spindle system and to use this method for design optimization. The 3D model was designed using the SolidWorks CAD software. The static analysis was completed by modal, harmonic response and thermal analysis, but their results will be presented in other papers.

scholarly journals Optimization research on arc height of running surface based on reducing partial wear of straddle-type monorail vehicle running wheel tire

2021 ◽  
Vol 13 (10) ◽  
pp. 168781402110534
Author(s):  
XiaoXia Wen ◽  
ZiXue Du ◽  
Liang Chen
Keyword(s):  
Genetic Algorithm ◽  
Finite Element ◽  
Finite Element Model ◽  
Simulation Optimization ◽  
Element Model ◽  
Multidisciplinary Optimization ◽  
Improved Genetic Algorithm ◽  
Running Wheel ◽  
Contact State ◽  
Running Wheels

This article proposes an ideal of reducing the partial wear of the running wheels by optimizing the arc height of the running surface to improve the wheel-rail contact state. To realize this idea, two kinds of concave and convex running surfaces were designed, the “running wheel-rail beam” finite element model of three kinds of rail surfaces of concave, convex, and plane were established. Taking the arc height of the running surface as the design variable, the total friction work and the friction work deviation (FWD) value as the dual optimization goal, an optimization model of arc height of running surface was established based on finite element model and multidisciplinary optimization platform Modefrontier. An improved genetic algorithm was used and an co-simulation optimization mode was put forward in the optimization. The optimization results show that when the concave height of the inner running surface is 22.62 mm, the total friction work and the FWD values are reduced by 11% and 11.8% respectively; When the convex height of the outer running surface is 11.81 mm, the objection values are reduced by 4.9% and 32.1% respectively. An ideal running surface was obtained and the life of the running wheel was extended by the research.

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