scholarly journals Mechanical Analysis of Crossbeam in a Gantry Machine Tool and its Deformation Compensation

2015 ◽  
Vol 9 (1) ◽  
pp. 213-218
Author(s):  
Li Qilong ◽  
Guo Xuhong ◽  
Chen Yao ◽  
Ji Wenzheng ◽  
Wang Liang ◽  
...  
Keyword(s):  
Finite Element ◽  
Static Characteristic ◽  
Machining Accuracy ◽  
Machining Performance ◽  
Characteristic Analysis ◽  
Element Analysis ◽  
Distortion Compensation ◽  
Maximum Deformation ◽  
Machining Center ◽  
Compensation Curve

The beam is an important component in agantry machining center, and its deformation is believed to have asignificant impact on both the machining accuracy and the machining performance. In this research, the finite element models of a complete gantry machining center and the crossbeam are established, in whicht he restraint and boundary conditions for the finite element analysis are also introduced. It is noted thatthe impact of balance cylinders on the key components is fully considered when dealing with the force analysis. Computed results of the static characteristic analysis showed that the maximum deformation is about 0.080925 mm when crossbeam operates under different conditions. Then, the distortion curve and the compensation curve of guide rail are obtained, and the equation of a fitting compensation curve is also deduced through numerical analysis. This research is expected to provide a theoretical guide for distortion compensation of the crossbeam.

The Statics Characteristic Analysis of Fixed Beam Gantry Machine Tool Crossbeam Based on ANSYS

2015 ◽  
Vol 757 ◽  
pp. 81-85
Author(s):  
Chun Ming Song ◽  
Ming Cao ◽  
Dong Sheng Zhang
Keyword(s):  
Finite Element ◽  
Machine Tool ◽  
Middle Part ◽  
The Finite Element Method ◽  
Characteristic Analysis ◽  
Element Analysis ◽  
Maximum Deformation ◽  
Design Requirements ◽  
Stress And Deformation ◽  
Gantry Machine Tool

In order to calculate the crossbeam’s stress and deformation under the weight of gantry machine tool, and analyze whether the deformation meets the precision of design requirements. In this paper, we will use the finite element method to get the stress and deformation in different directions with finite element analysis software-ANSYS. The result shows that the maximum deformation is 14.3 microns which appeared in the middle part of the beam towards the gravity direction and the maximum stress is 4730000 Pa which appeared in the joint of pillar and beam.

The Spindle Static Characteristic Analysis of HTC3250µn NC Machine Tool

2012 ◽  
Vol 157-158 ◽  
pp. 291-294
Author(s):  
Hua Long Xie ◽  
Wen Ke Zhang ◽  
Hui Min Guo ◽  
Yong Xian Liu
Keyword(s):  
Static Characteristic ◽  
Machining Accuracy ◽  
Static Stiffness ◽  
Analysis Model ◽  
Characteristic Analysis ◽  
Element Analysis ◽  
Finite Element Analysis Model ◽  
Nc Machine Tool ◽  
The Finite Element Analysis ◽  
Nc Machine

The analysis of spindle static stiffness is particularly important. The concept of spindle stiffness is introduced. Based on software ANSYS, the finite element analysis model of simplified spindle is established. Two equivalent forms of bearings are discussed and the analysis results are compared. The stress distribution nephogram of spindle is given. The research indicates that using spring-damper element instead of bearings is more suitable and the machining accuracy mainly depends on the stiffness rather than strength.

Finite Element Analysis of the Shock Absorber for Vehicle

2013 ◽  
Vol 706-708 ◽  
pp. 1361-1364
Author(s):  
Chao Fu Liu
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Elastic Modulus ◽  
Internal Pressure ◽  
Shock Absorber ◽  
Structural Features ◽  
Static Characteristic ◽  
Characteristic Analysis ◽  
Element Analysis ◽  
The Finite Element Analysis

As for the structural features and the characteristics of fiber-reinforced rubber of a shock absorber for vehicle, this paper mainly focuses on its deformation and static characteristic analysis. A shock absorber whose type is JW2-5202 was analyzed in its performance characteristics of deformation with variations in cord elastic modulus and cord angle. According to the finite element analysis on the load vs. the displacement, and the internal pressure vs. the displacement, the results are in accordance with the test ones.

Study on the Static and Dynamic Characteristics of Linear Rolling Guideway

2014 ◽  
Vol 490-491 ◽  
pp. 342-346
Author(s):  
Yao Man Zhang ◽  
Guang Xiao Yang ◽  
Ren Jun Gu
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Static Characteristic ◽  
Characteristic Analysis ◽  
Element Analysis ◽  
Dynamic Finite Element Analysis ◽  
Calculation Results ◽  
Nc Machine ◽  
Rolling Guide ◽  
Analysis Models

Linear rolling guides are widely used in the NC machine tool, and usually the NC machine tool's characteristics shall been influenced by the characteristics of the guide greatly. The HSR series of liner rolling guides are taken as the research object of the paper. The methods of constructing the dynamic finite element analysis models are studied. The contact element is applied to simulate the characteristics of junction surfaces during the static characteristic analysis. The spring damping element is applied during the dynamic characteristic analysis. The static stiffness, natural frequencies, modal shapes and other characteristics are obtained by finite element analysis. Then the experiments of linear rolling guide are carried out and verified the model that had been built and calculation results of finite element analysis.

The Helmet Reverse Forming and Static Characteristic Analysis

2013 ◽  
Vol 712-715 ◽  
pp. 1145-1148
Author(s):  
Shi Gang Wang ◽  
Guan Xiong Wu ◽  
Chao Cui ◽  
Xi Bing Li
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Reverse Engineering ◽  
Laser Scanner ◽  
Static Characteristic ◽  
Deformation Analysis ◽  
Test Problems ◽  
Characteristic Analysis ◽  
Element Analysis ◽  
Cloud Data

In order to solve irregular product surface quality is difficult to test problems, this paper combined reverse engineering with finite element analysis related technologies, good results have been achieved. Selected the helmet as the research object, introduced the reverse engineering and finite element analysis of the basic methods and ideas. First through the 3D laser scanner for safety helmet surface point cloud data, the data conducted the pretreatment in the Imageware software, and then in UG finished surface reconstruction and materialization process, finally guided the reverse forming helmet entity into Ansys Workbench software to carry on the finite element analysis, through the generation of stress and deformation analysis nephogram to test the sample quality.

Characteristic Analysis and Optimization for the Tailstock Body of the NC Lathe

2014 ◽  
Vol 1037 ◽  
pp. 41-44
Author(s):  
Mo Wu Lu ◽  
Ming Jie Li
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Topology Optimization ◽  
Machine Tools ◽  
Great Influence ◽  
Machining Accuracy ◽  
Characteristic Analysis ◽  
Element Analysis ◽  
Nc Machine ◽  
Nc Machine Tools

The characteristics of the NC Lathe tailstock has great influence on the machining accuracy of NC machine tools. Solidworks software is used to establish the tailstock body entity model, then import it into the Workbench software for finite element analysis and conclude its dynamic and statics characteristics. According to the result of the analysis on the topology optimization. Guarantee after optimization, the tailstock body not only can satisfy the requirement of machine tool, the quality can also be reduced by 5%. In saving material at the same time also can reduce the motion inertia, improve the machining accuracy.Keywords: tailstock body; statics analysis; modal analysis; topology optimization; Workbench;

Static and Modal Characteristic Analysis of a Horizontal Machining Center

2013 ◽  
Vol 690-693 ◽  
pp. 2496-2500
Author(s):  
Gui Qiang Liang ◽  
Mei Lin ◽  
Ting Ting Guo
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Element Model ◽  
Analysis Method ◽  
Characteristic Analysis ◽  
Accurate Analysis ◽  
Element Analysis ◽  
Modal Characteristics ◽  
Modal Characteristic ◽  
Machining Center

In order to get an accurate analysis results for static and modal characteristics of a machining center, finite element analysis method was taken. Taking a horizontal machining center as example, solid model was established firstly. Finite element model containing joint parameters was established in ANSYS. With the help of finite element method, static and modal characteristics of the horizontal machining center were carried out. It was concluded that the horizontal machining center has comparatively smaller static stiffness in Z direction; in order to improve modal characteristic of the horizontal machining center, the column and worktable should be paid more attention. The research results provide guidance for finite element analysis and optimization of whole machine tool.

Effects of occlusal scheme on All-on-Four abutments, screws and prostheses: A three-dimensional finite element study

2020 ◽  
Author(s):  
Nurullah Türker ◽  
Hümeyra Tercanlı Alkış ◽  
Steven J Sadowsky ◽  
Ulviye Şebnem Büyükkaplan
Keyword(s):  
Finite Element ◽  
Three Dimensional ◽  
Good Prognosis ◽  
Von Mises Stress ◽  
Element Analysis ◽  
Group Function ◽  
Occlusal Contact ◽  
Maximum Deformation ◽  
Contact Points ◽  
Von Mises

An ideal occlusal scheme plays an important role in a good prognosis of All-on-Four applications, as it does for other implant therapies, due to the potential impact of occlusal loads on implant prosthetic components. The aim of the present three-dimensional (3D) finite element analysis (FEA) study was to investigate the stresses on abutments, screws and prostheses that are generated by occlusal loads via different occlusal schemes in the All-on-Four concept. Three-dimensional models of the maxilla, mandible, implants, implant substructures and prostheses were designed according to the All-on-Four concept. Forces were applied from the occlusal contact points formed in maximum intercuspation and eccentric movements in canine guidance occlusion (CGO), group function occlusion (GFO) and lingualized occlusion (LO). The von Mises stress values for abutment and screws and deformation values for prostheses were obtained and results were evaluated comparatively. It was observed that the stresses on screws and abutments were more evenly distributed in GFO. Maximum deformation values for prosthesis were observed in the CFO model for lateral movement both in the maxilla and mandible. Within the limits of the present study, GFO may be suggested to reduce stresses on screws, abutments and prostheses in the All-on-Four concept.

Bionic design of the tower for wind turbine

2021 ◽  
pp. 095440622110046
Author(s):  
Yuqiao Zheng ◽  
Fugang Dong ◽  
Huquan Guo ◽  
Bingxi Lu ◽  
Zhengwen He
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Maximum Stress ◽  
Natural Frequencies ◽  
Bionic Design ◽  
Analytic Hierarchy ◽  
Element Analysis ◽  
Maximum Deformation ◽  
Overall Stability ◽  
Biological Selection

The study obtains a methodology for the bionic design of the tower for wind turbines. To verify the rationality of the biological selection, the Analytic Hierarchy Procedure (AHP) is applied to calculate the similarity between the bamboo and the tower. Creatively, a bionic bamboo tower (BBT) is presented, which is equipped with four reinforcement ribs and five flanges. Further, finite element analysis is employed to comparatively investigate the performance of the BBT and the original tower (OT) in the static and dynamic. Through the investigation, it is suggested that the maximum deformation and maximum stress can be reduced by 5.93 and 13.75% of the BBT. Moreover, this approach results in 3% and 1.1% increase respectively in the First two natural frequencies and overall stability.

Finite Element Analysis and Optimization of Long-Span Gantry NC Machining Center Structure

2011 ◽  
Vol 346 ◽  
pp. 379-384
Author(s):  
Shu Bo Xu ◽  
Yang Xi ◽  
Cai Nian Jing ◽  
Ke Ke Sun
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Design Method ◽  
Dynamic Performance ◽  
Plate Thickness ◽  
Element Model ◽  
Wall Structure ◽  
Characteristic Analysis ◽  
Element Analysis ◽  
Dynamic Performance Analysis

The use of finite element theory and modal analysis theory, the structure of the machine static and dynamic performance analysis and prediction using optimal design method for optimization, the new machine to improve job performance, improve processing accuracy, shorten the development cycle and enhance the competitiveness of products is very important. Selected for three-dimensional CAD modeling software-UG NX4.0 and finite element analysis software-ANSYS to set up the structure of the beam finite element model, and then post on the overall structure of the static and dynamic characteristic analysis, on the basis of optimized static and dynamic performance is more superior double wall structure of the beam. And by changing the wall thickness and the thickness of the inner wall, as well as the reinforcement plate thickness overall sensitivity analysis shows that changes in these three parameters on the dynamic characteristics of post impact. Application of topology optimization methods, determine the optimal structure of the beam ultimately.

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