Modeling a Thermomechanical NC-Simulation

Denkena, Berend; Schmidt, Alfred; Henjes, Jan; Niederwestberg, D.; Niebuhr, Carsten

doi:10.1016/j.procir.2013.06.067

Cited by 18 publications

(2 citation statements)

References 9 publications

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“…This is done in every time step of the finite element method. The overall method is described in [4,5]. Figure 1 shows the mesh, temperature, and deformation from the simulation of a milling process.…”

Section: Numerical Discretization Of the Forward Problemmentioning

confidence: 99%

Optimization of Engineering Processes Including Heating in Time-Dependent Domains

Schmidt

Bänsch

Jahn

et al. 2016

IFIP Advances in Information and Communication Technology

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We present two models for engineering processes, where thermal effects and time-dependent domains play an important role. Typically, the parabolic heat equation is coupled with other equations. Challenges for the optimization of such systems are presented. The first model describes a milling process, where material is removed and heat is produced by the cutting, leading to thermomechanical distortion. Goal is the minimization of these distortions. The second model describes the melting and solidification of metal, where the geometry is a result of free-surface flow of the liquid and the microstructure of the re-solidified material is important for the quality of the produced preform.

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Section: Numerical Discretization Of the Forward Problemmentioning

confidence: 99%

Optimization of Engineering Processes Including Heating in Time-Dependent Domains

Schmidt

Bänsch

Jahn

et al. 2016

IFIP Advances in Information and Communication Technology

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show abstract

“…[6] Possible areas of application of process modelling are quality-predictive CAM simulations [7] or the monitoring of processes [8][9][10][11]. Here, different effects such as thermal and mechanical influences can be mapped [10,[12][13][14]. Mechanical influences can lead to deformations on the tool side as well as on the workpiece side and cause shape deviations on the component.…”

Section: Introductionmentioning

confidence: 99%

Modelling Clamping Force Deflection in Dexel-Based Material Removal Simulations

Brecher¹,

Loba²,

Fey³

2021

Preprint

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Machining simulations of material removal that predict workpiece quality are a key factor in gaining an understanding of the possible causes of manufacturing defects. Particularly in the case of thin-walled workpieces, as are frequently produced in the aerospace industry, the workpiece stiffness is of utmost importance. Form deviations on the final workpiece can result due to the the process force or the clamping situation. This article presents a method for modelling the deformation due to the clamping force in dexel-based material removal simulations. To prevent distortion of the dexel model, triangulated surface meshes are generated separately for the start and end points of a dexel field by means of a Delaunay triangulation for the final contour. With the help of an FE simulation of the near contour state, the resulting displacements for the corner points of the triangles are determined and then inversely displaced. Subsequently, the new start and end points of the machined dexels are determined through a 2D interpolation. The method is validated for flatness and roundness deviations using two specimen workpieces. It shows that the prediction can be significantly improved, especially for thin-walled components.

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