scholarly journals Fixture Optimization in Turning Thin-Wall Components

Machines ◽  
2019 ◽  
Vol 7 (4) ◽  
pp. 68
Author(s):  
Lisa Croppi ◽  
Niccolò Grossi ◽  
Antonio Scippa ◽  
Gianni Campatelli
Keyword(s):  
Finite Element ◽  
Cutting Forces ◽  
Thin Wall ◽  
Effective Solution ◽  
Static Deflection ◽  
Thin Walled ◽  
Unstable Vibration ◽  
Dimensional Errors ◽  
Wall Components

The turning of thin-walled components is a challenging process due to the flexibility of the parts. On one hand, static deflection due to the cutting forces causes geometrical and dimensional errors, while unstable vibration (i.e., chatter) could compromise surface quality. In this work, a method for fixturing optimization for thin-walled components in turning is proposed. Starting from workpiece geometry and toolpath, workpiece deflections and system dynamics are predicted by means of an efficient finite element modeling approach. By analyzing the different clamping configurations, a method to find the most effective solution to guarantee the required tolerances and stable cutting conditions is developed. The proposed method was tested as a case study, showing its application and achievable results.

Analysis of Deformation for PC Thin-Wall Box Girders Exposed to Fire

2011 ◽  
Vol 368-373 ◽  
pp. 930-933
Author(s):  
Wei Hou ◽  
Shuan Hai He ◽  
Cui Juan Wang ◽  
Gang Zhang
Keyword(s):  
Finite Element ◽  
Thin Wall ◽  
Fire Load ◽  
Box Girders ◽  
Conduction Model ◽  
Load Model ◽  
Deformation Problem ◽  
Finite Element Procedure ◽  
Thin Walled

Being aimed to deformation problem of pre-stressed concrete thin-walled multi-room box girders exposed to co-action of fire and load, on the basis of enthalpy conduction model and thermo-mechanics parameters, the finite element procedure was applied to analyze the deformation of three spans pre-stressed concrete thin-walled multi-room box girders exposed to co-action of fire and load. In conclusion, the deflection is obvious under action of the variation width and fire load model.

Improving the honing accuracy of the holes of stepped thin-walled cylinders

2021 ◽  
pp. 49-54
Author(s):  
V.A. Ogorodov
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Cutting Forces ◽  
Software Package ◽  
The Finite Element Method ◽  
Radial Forces ◽  
Thin Walled ◽  
Hole Machining ◽  
Deform 3D ◽  
Walled Cylinder

Different ways of fixing of stepped thin-walled cylinders during honing are analyzed. The conditions for increasing the accuracy of hole machining are determined on the basis of unevenness of cylinder deformations from clamping forces and radial forces simulating cutting forces. The studies used the finite element method and the DEFORM-3D V6.1 software package. Keywords: honing, stepped thin-walled cylinder, hole, accuracy, fixing method, deformation, unevenness, DEFORM-3D V6.1 software package. [email protected]

Investigation of the Impact Analysis of Microscale Thin-Walled Structures Manufactured by High-Speed Machining

2006 ◽  
Vol 326-328 ◽  
pp. 1599-1602
Author(s):  
Bo Sung Shin
Keyword(s):  
Finite Element ◽  
Cutting Force ◽  
High Speed ◽  
Impact Analysis ◽  
Thin Wall ◽  
High Speed Machining ◽  
High Speed Cutting ◽  
Thin Walled Structures ◽  
Thin Walled ◽  
The Impact

High-speed machining (HSM) is very useful method as one of the most effective manufacturing processes because it has excellent quality and dimensional accuracy for precision machining. Recently micromachining technologies of various functional materials with very thin walls are needed in the field of electronics, mobile telecommunication and semiconductors. However, HSM is not suitable for microscale thin-walled structures because of the lack of their structure stiffness to resist high-speed cutting force. A microscale thin wall machined by HSM shows the characteristics of the impact behavior because the high-speed cutting force works very shortly on the machined surface. We propose impact analysis model in order to predict the limit thickness of a very thin-wall and investigate its limit thickness of thin-wall manufactured by HSM using finite element method. Also, in order to verify the usefulness of this method, we will compare finite element analyses with experimental results and demonstrate some applications.

Efficient Algorithms for Calculations of the Maximum Surface Form Errors in Peripheral Milling

2007 ◽  
Vol 10-12 ◽  
pp. 757-761
Author(s):  
Yong Gang Kang ◽  
Zhong Qi Wang ◽  
J.J. Wu ◽  
Cheng Yu Jiang
Keyword(s):  
Finite Element ◽  
Iterative Algorithm ◽  
Element Model ◽  
Surface Form ◽  
Peripheral Milling ◽  
Maximum Surface ◽  
Form Errors ◽  
Thin Walled ◽  
Dimensional Errors ◽  
Key Techniques

An efficient flexible iterative algorithm with a general approach is presented for calculations of surface form errors in peripheral milling of thin-walled workpiece. An efficient finite-element model for tool/workpiece is presented to analyze the surface dimensional errors in peripheral milling of aerospace thin-walled workpieces. The efficient flexible iterative algorithm is proposed to calculate the deflections and the maximum surface form errors as contrasted with the rigid iterative algorithm used in the literatures. Meanwhile, some key techniques such as the finite-element modeling of the tool-workpiece system; the determinant algorithm to judge instantaneous immersion boundaries between a cutter element and the workpiece; iterative scheme for the calculations of tool-workpiece deflections considering the former convergence cutting position are developed and the method for calculating the position and magnitude of the maximum surface form errors are developed and presented in detail. The proposed approach is validated and proved to be efficient through comparing the obtained numerical results with the test results.

scholarly journals Data-Driven Decision-Making in the Design Optimization of Thin-Walled Steel Perforated Sections: A Case Study

2018 ◽  
Vol 2018 ◽  
pp. 1-14
Author(s):  
Zhi-Jun Lyu ◽  
Qi Lu ◽  
YiMing Song ◽  
Qian Xiang ◽  
Guanghui Yang
Keyword(s):  
Decision Making ◽  
Finite Element ◽  
Finite Element Simulation ◽  
Optimization Design ◽  
Data Driven ◽  
Physical Test ◽  
Element Simulation ◽  
Industrial Big Data ◽  
Thin Walled

The rack columns have so distinctive characteristics in their design, which have regular perforations to facilitate installation of the rack system that it is more difficult to be analyzed with traditional cold-formed steel structures design theory or standards. The emergence of industrial “big-data” has created better innovative thinking for those working in various fields including science, engineering, and business. The main contribution of this paper lies in that, with engineering data from finite element simulation and physical test, a novel data-driven model (DDM) using artificial neural network technology is proposed for optimization design of thin-walled steel specific perforated members. The data-driven model based on machine learning is able to provide a more effective help for decision-making of innovative design in steel members. The results of the case study indicate that compared with the traditional finite element simulation and physical test, the DDM for the solving the hard problem of complicated steel perforated column design seems to be very promising.

Cutting Parameters Optimization of Thin-Walled Workpiece Based on PSO and FEM

2012 ◽  
Vol 248 ◽  
pp. 408-412
Author(s):  
Li Li Qian ◽  
Wei Fang Chen ◽  
Wan Tai Ma
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Cutting Parameters ◽  
Parameters Optimization ◽  
Particle Swarm Algorithm ◽  
Maximum Deformation ◽  
Design Variables ◽  
Thin Walled ◽  
Cutting Parameters Optimization

An approach to optimize the cutting parameters based on Particle Swarm Algorithm(PSO) and Finite Element Method(FEA) was proposed. A cutting parameters optimization model was established whose design variables are the cutting parameters and objective function is to minimize the maximum deformation. PSO was used to optimize the cutting parameters and FEA was utilized to predict the machining deformation of the thin-walled workpiece. Finally, the entire technique was demonstrated in a case study. The simulation and experimental results show that the approach can be further employed into the practical machining situation.

The Finite Element Analysis of Thin-Wall Ribbed Square Steel Tube Recycled Concrete Bias Column Mechanical Properties

2013 ◽  
Vol 690-693 ◽  
pp. 914-918
Author(s):  
Yue Hong Li ◽  
Bai Shou Li
Keyword(s):  
Mechanical Properties ◽  
Finite Element ◽  
Bearing Capacity ◽  
Steel Tube ◽  
Recycled Concrete ◽  
Thin Wall ◽  
Eccentric Compression ◽  
Specimen Axis ◽  
Thin Walled ◽  
Square Steel Tube

In order to study ribbed thin-walled square steel tube recycled concrete eccentric compression column, used the mechanical properties of ANSYS software, conduct the nonlinear numerical simulation. The analysis of the ribbed and ribbed, recycled coarse aggregate replacement ratio and eccentricity, three factors on the eccentric compression column mechanical performance, proved the thin-walled square steel tube that recycled concrete composite column the effectiveness of three-dimensional finite element simulation. The result shows that: when aggregate replace rate was 0%, ribbed specimen than not ribbed specimen axial displacement and displacement to the reduced to 5.77% and 2.33% respectively. When the aggregate replace rate was 50%, ribbed specimen than not ribbed specimen shaft voltage and bias displacement has been reduced by 6.53% and 4.22%; When the aggregate replace rate was 0%, ribbed specimen than not ribbed specimen axis pressure bearing capacity and bias the bearing capacity increased by 1.21% and 2.74%. When the aggregate replace rate was 50%, ribbed specimen than not ribbed specimen axis pressure bearing capacity and bias the ultimate bearing capacity increased by 1.04% and 2.82%.

Design and Finite Element Analysis of the Assemble Tooling System for Aircraft Thin-Wall Components

2011 ◽  
Vol 338 ◽  
pp. 189-192
Author(s):  
Yan Hai Chen ◽  
Xiao Guang Han ◽  
Ye Guang Yang ◽  
Yu Zhu Li
Keyword(s):  
Finite Element ◽  
3D Model ◽  
Weak Links ◽  
Thin Wall ◽  
Element Analysis ◽  
Finite Element Software ◽  
Tooling System ◽  
Industrial Pc ◽  
Assembly Precision ◽  
Wall Components

Aiming at the problems of low assembly precision and inefficient in the process of assembling thin-wall components of aircrafts , using the CATIA software to establish the 3D–model of the thin-wall components flexible tooling system. In order to improve the weak links of the system , application of the finite element software ANSYS to analysis the system, and using industrial PC to realize the controling of the whole system.

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