臺灣博碩士論文加值系統

The virtual reality (VR) technology has been researched and developed dramatically in
recent years. Its importance and application, in engineering and education, have been
discussed and displayed in various science conferences. In engineering, many works have
been proposed relating to VR technology at universities and research institutes around the
world. Despite of what scientists have achieved, VR technology is still a broad and worth
topic to research and discover at the moment and in the future.
Along with development of VR technology in engineering, this thesis proposes a new
method in modeling and simulation of virtual machine tools. Three kinds of five-axis CNC
milling machine tools are taken as research objects: Head – Table machine, Head – Head
machine and Table – Table machine. The machine configurations are constructed basing on
a LNC-M520HC five-axis machining center in the Remote Virtual Rapid Manufacturing
Laboratory, Department of Mechanical Engineering, National Kaohsiung University of
Applied Sciences, Taiwan. The method mainly uses CATIA software to build, define and
simulate these three machines. The kinematic relationship between the components, home
position, travel limits, etc of the machines are defined. The virtual machine tools then are
simulated with three certain manufacturing processes. During the simulation, tool-path and
cutting process with work-piece deformation are dynamically displayed and edited. Besides,
the collision between components of the machines could be detected and avoided.
After that, VERICUT software is employed to model these three types of five – axis
machine. For Head – Table machine, one machining program is used to test this machine.
In which, this program is created by CATIA software. The simulation is conducted in both
of two cases of using APT code and NC code. The NC code is created from APT code by
using post – processor software. Also, an experiment is installed and run on real machine.
At the end of machining process, the machined part is compared with simulation result.
The significance of the proposed method is that it can be applied in engineering as well
as in training and education. This issue is briefly discussed at the end of the thesis.

Abstract ................................................................................................................I
Acknowledgements............................................................................................ II
Content.............................................................................................................. III
List of Figures.................................................................................................... V
List of Tables ................................................................................................. VIII
Chapter 1 Introduction ........................................................................................ 1
1.1 Introduction................................................................................................................1
1.2 Objectives of the thesis..............................................................................................4
1.3 Research method........................................................................................................5
1.4 Thesis structure..........................................................................................................6
Chapter 2 Literature Review............................................................................... 7
2.1 Paper review ..............................................................................................................7
2.2 Software review .......................................................................................................15
Chapter 3 Machining Processes........................................................................ 17
3.1 Introduction to machining processes .......................................................................17
3.2 Overview of machine tools......................................................................................18
3.3 Typical CNC machine tools.....................................................................................19
3.3.1 Vertical machining centre.............................................................................20
3.3.2 Horizontal machining centre.........................................................................21
Chapter 4 Modeling of five-axis CNC machine using CATIA software ......... 22
4.1 Head-table machine .................................................................................................22
4.1.1 Defining machine kinematics. ......................................................................24
4.1.2 Defining tool and work-piece mount points .................................................27
4.1.3 Defining home positions...............................................................................30
4.1.4 Defining travel limits....................................................................................31
4.1.5 Defining tool change position.......................................................................32
4.1.6 Machine simulation ......................................................................................33
4.2 Head – head machine...............................................................................................36
4.2.1 The virtual machine tool modeling...............................................................36
4.2.2 The virtual machine simulation ....................................................................43
IV
4.3 Table – table machine..............................................................................................47
4.3.1 The virtual machine tool modeling...............................................................47
4.3.2 The virtual machine tool simulation .............................................................53
Chapter 5 Modeling of five-axis CNC machine using VERICUT software.... 55
5.1. VERICUT introduction ..........................................................................................55
5.2. Head – Table machine modeling and simulation ...................................................57
5.2.1. Machine modeling .......................................................................................57
5.2.2. Machine simulation .....................................................................................63
5.3. Head – Head machine modeling.............................................................................67
5.4. Table – Table machine modeling ...........................................................................72
Chapter 6 Result and Discussion ...................................................................... 77
Chapter 7 Conclusion and Future Works ......................................................... 80
References......................................................................................................... 82

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