scholarly journals A study on the Model of 3D-coordinate Measuring Machine Error Compensation Based on Finite Element Simulation

2007 ◽  
Vol 2007.4 (0) ◽  
pp. 7D402
Author(s):  
Jizhu Liu ◽  
Shuanghui Hao ◽  
Minghui Hao ◽  
Baoyu Song
Keyword(s):  
Finite Element ◽  
Finite Element Simulation ◽  
Error Compensation ◽  
Coordinate Measuring Machine ◽  
Machine Error ◽  
Element Simulation ◽  
Measuring Machine

Validation of Residual Stresses of Finite Element Simulation of Multi Pass Butt-Welded Plates Using the Contour Method

2011 ◽  
Vol 681 ◽  
pp. 67-72
Author(s):  
Eduardo Rodríguez ◽  
Cristina Martín ◽  
José Luis Cortizo ◽  
Julio Guirao ◽  
José Manuel Sierra
Keyword(s):  
Finite Element ◽  
Residual Stresses ◽  
Finite Element Simulation ◽  
Fe Simulation ◽  
Coordinate Measuring Machine ◽  
Contour Method ◽  
Element Simulation ◽  
Measuring Machine ◽  
Number Of Passes ◽  
Good Agreement

In this paper a comparison between the results obtained using multi pass welding finite element (FE) simulation and the contour method was made to evaluate the accuracy in residual stresses simulated for plates with different thicknesses. The contour method has been used to measure the residual stresses in multi pass butt-welded plates. Two 316 austenitic stainless steel multi pass Metal Inert Gas (MIG) butt-welded plates of 10 mm thickness were cut using wire Electric Discharge Machining (EDM). The measurements of the cross-section were made with a coordinate measuring machine (CMM) and the points obtained were used to calculate the residual stresses by mean of static analysis of finite elements. A multi pass welding FE simulation of the two plates was made to obtain the residual stresses after time cooling. The simulated results are generally in good agreement with the experimental measurements. Other plates of 25 mm thickness and the same material were multi pass MIG butt-welded to evaluate the behavior with different thicknesses. In this case the number of passes was 11. The same method was applied to obtain the residual stresses. A comparison between different thicknesses was made. The residual stresses validation will allow the finite element simulation to be used for the later simulation of residual stresses relaxation.

Aero-Engine Blade Deformation Control of Milling Process

2011 ◽  
Vol 308-310 ◽  
pp. 1198-1204
Author(s):  
Hui Xian Chen ◽  
Hao Li ◽  
Hai Tao Feng ◽  
Min Juan Du
Keyword(s):  
Finite Element ◽  
Finite Element Simulation ◽  
Error Compensation ◽  
Leaf Blade ◽  
Tool Path ◽  
Iterative Solution ◽  
Helical Milling ◽  
Machining Accuracy ◽  
Element Simulation ◽  
Compensation Plan

The leaf blade manufacture precision's influencing factors are numerous, and they have coupling relationship each other. So it is difficult to peel out a single factor on the influencing regularity of the blade's machining accuracy. By researching the engine blades of helical milling state under the existing fixture, the leaf blade deformable model based on the instantaneous milling strength was established. Meanwhile, the off-line multi-level error compensation plan was proposed based on the processing surface static error forecasts and compensation. In order to revise the primitive NC tool path code and eliminate the processing distortion inaccuracy, the elastic deformity on each knife position spot is solved on the basis of iterative solution, using the finite element simulation and milling strength model. By using ANSYS finite element simulation, it receives the real-time error compensation of the tool path. And then The experiment has proven the accuracy and the usability of the compensation plan.

scholarly journals An improved technique of clamping method for keeping coaxiality precision of rotating frame

2018 ◽  
Vol 189 ◽  
pp. 05005
Author(s):  
Long Wu ◽  
A M Wang ◽  
P H Ren ◽  
D X Li
Keyword(s):  
Finite Element ◽  
Finite Element Simulation ◽  
Rotating Frame ◽  
Improved Method ◽  
Machine Error ◽  
Element Simulation ◽  
Direct Pressure ◽  
Main Factors ◽  
Clamping Device ◽  
Improved Technique

In order to ensure the concentricity accuracy of frame-like thinwalled parts, this paper takes the rotating frame as a machining example. And using the method of finite element simulation and calculation, this paper analyzes the main factors that cause the error of coaxiality of the rotating frame. Because the clamping force of the clamping device causes the deformation of the workpiece, this article is based on the finite element simulation to improve the clamping method. By adding a fixing block at the bottom of the frame and clamping with the fixing block to avoid direct pressure on the rotating frame, the error of frame concentricity caused by the clamping deformation is reduced in this way. Aiming at the error caused by machine error, this paper improves the clamping device and adds the calibration mechanism to correct the machine error and ensure the coaxial accuracy. Through the application of the improved method proposed in this paper, the concentricity error of the rotating frame can be guaranteed within 0-0.005mm.

Finite Element Simulation of Tire-Rim Interface

1989 ◽  
Vol 17 (4) ◽  
pp. 305-325 ◽  
Author(s):  
N. T. Tseng ◽  
R. G. Pelle ◽  
J. P. Chang
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Finite Element Simulation ◽  
Contact Pressure ◽  
Element Model ◽  
Experimental Measurements ◽  
Inflation Pressure ◽  
Interference Fit ◽  
Element Simulation ◽  
Rubber Composite

Abstract A finite element model was developed to simulate the tire-rim interface. Elastomers were modeled by nonlinear incompressible elements, whereas plies were simulated by cord-rubber composite elements. Gap elements were used to simulate the opening between tire and rim at zero inflation pressure. This opening closed when the inflation pressure was increased gradually. The predicted distribution of contact pressure at the tire-rim interface agreed very well with the available experimental measurements. Several variations of the tire-rim interference fit were analyzed.

Numerical Simulation of Tire Sliding Events Involving Impacts with Holes and Bumps

1986 ◽  
Vol 14 (2) ◽  
pp. 125-136 ◽  
Author(s):  
Y. Nakajima ◽  
J. Padovan
Keyword(s):  
Numerical Simulation ◽  
Finite Element ◽  
Finite Element Simulation ◽  
Full Range ◽  
Arbitrary Geometry ◽  
Operating Environments ◽  
Element Simulation ◽  
Simulation Scheme

Abstract This paper extends the finite element simulation scheme to handle the problem of tires undergoing sliding (skidding) impact into obstructions. Since the inertial characteristics are handled by the algorithm developed, the full range of operating environments can be accommodated. This includes the treatment of impacts with holes and bumps of arbitrary geometry.

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