The Geometric Modeling of Pieces in Virtual Milling Simulation

2011 ◽  
Vol 291-294 ◽  
pp. 2262-2265 ◽  
Author(s):  
Hai Xia Bi ◽  
Shi Jie Li ◽  
Yan Rui Zhang
Keyword(s):  
Process Simulation ◽  
Geometric Modeling ◽  
Milling Process ◽  
Simulation System ◽  
Data Type ◽  
Object Space ◽  
Virtual Machining ◽  
Milling Simulation ◽  
Modeling Techniques ◽  
Cnc Simulation

The process simulation of virtual machining is the key technique in the CNC simulation system. So the paper talks about some useful geometric modeling techniques in simulation field, and bring forward an improved object-space separating modeling technique based on the idea of Dexel and the data-type of Z-MAP, which is a kind of geometric modeling for pieces for milling process simulation. This method is to a certain degree reduced calculation quantities in simulation, increased the speed of simulation and optimized the effect of simulation.

Accurate Milling Process Simulation Using ME Z-Map Model

Manufacturing ◽  
2003 ◽  
Author(s):  
Han Ul Lee ◽  
Dong-Woo Cho
Keyword(s):  
Cutting Force ◽  
Process Simulation ◽  
Cutting Forces ◽  
Computing Time ◽  
Milling Process ◽  
Simulation System ◽  
Grid Size ◽  
Force Model ◽  
Cutting Force Model ◽  
Edge Node

In this paper, a milling process simulation system was constructed and ME Z-map (Moving Edge node Z-map) model was developed to elevate the performance of this system. The milling process simulation system computes the cutting configuration and then the cutting forces are predicted using these calculated configurations. In this system, an improved cutting force model which is independent of cutting conditions is used to more precisely predict the cutting forces. In the process, the ME Z-map model was used for more accurate computing of cutting configuration. Due to the edge node, ME Z-map model produces more accurate cutting configuration than the conventional Z-map models even with five to ten times larger grid size, which reduces the computing time dramatically. The superiority of the ME Z-map model was confirmed through comparison with the conventional Z-map.

Study on System of 3D Virtual NC Machining Environment

2010 ◽  
Vol 44-47 ◽  
pp. 859-863
Author(s):  
Fan Xin Kong ◽  
Jian Min Zuo ◽  
Hong Yan Hao ◽  
Bo Rong Zhou
Keyword(s):  
Geometric Modeling ◽  
Three Dimensional ◽  
Simulation System ◽  
Behavioral Modeling ◽  
Cnc Milling ◽  
Code Analysis ◽  
Nc Code ◽  
Modeling Technology ◽  
Virtual Machining ◽  
Key Technologies

This paper, combining with actual machining situation of CNC milling , put forward system architecture based 3D（three-dimensional）visual virtual machining environment. Based on key technologies including geometric modeling ，behavioral modeling technology and NC code analysis of simulation system of three-dimensional virtual CNC milling，it developed simulation system of CNC milling that can realize the function of operation and programming.

Research on the Simulation of NC Milling Program Based on VERICUT Oriented to the Five-Axis Micro-Milling System

2014 ◽  
Vol 599-601 ◽  
pp. 417-421
Author(s):  
Xiang Hui Zhang ◽  
Zhan Wen Sun ◽  
Jin Zhao ◽  
Hua Dong Yu
Keyword(s):  
Simulation Model ◽  
Milling Process ◽  
Micro Milling ◽  
Virtual Machining ◽  
Milling Simulation ◽  
Motion Structure ◽  
Processing Program ◽  
Nc Milling ◽  
Processing Module ◽  
Five Axis

In order to verify the correctness of the NC processing program which is generated by the post processing module of the Independently developed 5-axis micro-milling system, this article analyze the motion structure and obtained the topology relation between the feed shafts of the micro-milling system, established the milling simulation model of the micro-milling system by the VERICUT—the Virtual machining simulation platform. The milling process of an example part with a typical ellipsoid structure has been simulated by the milling simulation model and the correctness of the NC processing program and coordinate transforming relation have been verified by the simulation result.

Development of Three-Dimensional Parametric Modeling for Milling Process Simulation

2010 ◽  
Vol 139-141 ◽  
pp. 1178-1183
Author(s):  
Jing Sheng ◽  
Guang Guo Zhang ◽  
Hong Hua Zhang
Keyword(s):  
3D Modeling ◽  
Process Simulation ◽  
Three Dimensional ◽  
Milling Process ◽  
Parametric Modeling ◽  
Machining Simulation ◽  
Metal Machining ◽  
Simulation Results ◽  
Key Techniques ◽  
Access Data

Metal machining simulation using finite element method (FEM) is extraordinarily complex. It is essential to develop a system so as to construct simulation model and obtain valuable results conveniently and rapidly. This study developed a parametric modeling based on MSC.Marc software, which included the key techniques of three-dimensional (3D) modeling and the parametric modeling course of metal milling process. In addition, an explanation facility based on the procedure file, which could be run automatically, was performed according to a modeling procedure. The interface of the system designed using Builder, could access data, which included the geometric angles and the dimensions of a tool and a workpiece, the relative position between them, their properties and cutting conditions, etc.. Calling the procedure file, the system approached the parametric modeling. An example was given, which simulation results indicated that it is an effective methodology to develop 3D parametric modeling.

Towards Dynamic Tolerance Analysis Using Bond Graphs

1998 ◽  
Author(s):  
Otto W. Salomons ◽  
Johan Zijlstra ◽  
Johnny A. van der Zwaag ◽  
Fred J. A. M. van Houten
Keyword(s):  
Dynamic Behavior ◽  
Robust Design ◽  
Physical Modeling ◽  
Geometric Modeling ◽  
Tolerance Analysis ◽  
Simulation System ◽  
Computer Support ◽  
Bond Graphs ◽  
Physical Effects ◽  
Geometric Modeling System

Abstract A generic method is proposed by which the effect of tolerances in combination with physical effects such as wear can be analysed on the dynamic behavior of mechanisms. The method uses bond graphs in order to simulate the dynamic behavior under the influence of tolerances and other physical effects. The method has the potential to offer enhanced computer support in tolerance value specification as well as in robust design and model based maintenance. The method has partly been implemented using a combination of a geometric modeling system (FROOM) and a bond graph based physical modeling and simulation system (20-Sim).

Geometric Modeling of Cutter/Workpiece Engagements in 3-Axis Milling Using Polyhedral Models

2007 ◽  
Author(s):  
Eyyup Aras ◽  
Derek Yip-Hoi
Keyword(s):  
Cutting Forces ◽  
Geometric Modeling ◽  
Tool Path ◽  
Cutting Tool ◽  
Milling Process ◽  
Mapping Technique ◽  
Depth Of Cut ◽  
Modeling Methodology ◽  
Machining System ◽  
Engagement Angle

Modeling the milling process requires cutter/workpiece engagement (CWE) geometry in order to predict cutting forces. The calculation of these engagements is challenging due to the complicated and changing intersection geometry that occurs between the cutter and the in-process workpiece. This geometry defines the instantaneous intersection boundary between the cutting tool and the in-process workpiece at each location along a tool path. This paper presents components of a robust and efficient geometric modeling methodology for finding CWEs generated during 3-axis machining of surfaces using a range of different types of cutting tool geometries. A mapping technique has been developed that transforms a polyhedral model of the removal volume from Euclidean space to a parametric space defined by location along the tool path, engagement angle and the depth-of-cut. As a result, intersection operations are reduced to first order plane-plane intersections. This approach reduces the complexity of the cutter/workpiece intersections and also eliminates robustness problems found in standard polyhedral modeling and improves accuracy over the Z-buffer technique. The CWEs extracted from this method are used as input to a force prediction model that determines the cutting forces experienced during the milling operation. The reported method has been implemented and tested using a combination of commercial applications. This paper highlights ongoing collaborative research into developing a Virtual Machining System.

An Algorithm for Geometric Modeling and Intersection in NC Milling Simulation Based on Triangular Mesh Model

2011 ◽  
Vol 48-49 ◽  
pp. 541-546 ◽  
Author(s):  
Dian Zhu Sun ◽  
Xin Cai Kang ◽  
Yan Rui Li ◽  
Yong Wei Sun
Keyword(s):  
Geometric Modeling ◽  
Tool Path ◽  
Triangular Mesh ◽  
Simulation Process ◽  
Mesh Model ◽  
Milling Simulation ◽  
Nc Simulation ◽  
Simulation Based ◽  
Triangular Mesh Model ◽  
Nc Milling

To achieve the accurate and efficient NC milling simulation based on the discrete triangular mesh model, we proposed an algorithm for geometric modeling and intersection. We construct the R*-tree index for upper-surface nodes of mesh model, based on which the nodes within cutting region can be obtained. We compute tool path segments within cutting projection region of node, and calculate the minimum adjustment height of node according to tool path segments within cutting projection region and then change the z-value of node. Thus, we complete the intersection calculation in simulation process. It has been proved by examples that the algorithm for geometric modeling and intersection in NC milling simulation has strong adaptation to tool path segment type and that it can accurately and efficiently reflect the effect of NC simulation process based on the discrete triangular mesh model of rough.

Optimization Based Geometric Modeling of Nano/Micro Scale Ion Milling of Organic Materials

2009 ◽  
Author(s):  
Jing Fu ◽  
Sanjay B. Joshi
Keyword(s):  
Geometric Modeling ◽  
Focused Ion Beam ◽  
Organic Materials ◽  
Ion Beam ◽  
Target Material ◽  
Milling Process ◽  
Ion Milling ◽  
Flexible Tool ◽  
Water Ice ◽  
Micro Scale

Recently, Focused Ion Beam (FIB) instruments have begun be applied to organic materials such as polymers and biological systems. This provides a novel tool for sectioning biological samples for analysis, or microfabrication with environment friendly materials. The modeling of nano/micro scale geometry accurately sculptured by FIB milling is crucial for generating the milling plan and process control, and for computer simulation for prediction and visualization of the milled geometry. However, modeling of the ion milling process on compound materials, especially for high aspect ratio feature, is still difficult due to the complexity of target material, as well as multiple physical and chemical interactions involved. In this study, a comprehensive model of ion milling with organic targets is presented to address the challenges using a simulation based approach. This platform has also been validated by milling different features on water ice in a cryogenic environment, and the simulation and experiment results show great consistency. With the proliferation of nanotechnology to biomedical and biomaterial domains, the proposed approach is expected to be a flexible tool for various applications involving novel and heterogeneous milling targets.

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