CATIA破面修复教程PPT课件

d
PROBLEM: surface boundary curves are not always clean enough to sort out the shared edges
STEP 2 consists in giving consistent orientations to faces which have a shared edge.
3. Model analysis with Healing Assistant
Face Checker Surface Connection Checker
4. Creating Topology
Repairing invalid surfaces Face Smooth Repairing bad topology situations Checking for free sides
Targeted audience
All designers, especially tooling designers
0.5 Day
Prerequisites
Wireframe & Surface Design
2
Table of Contents
1. Introduction to Healing Assistant
Healing = process of creating a valid V5 closed model out of any type of data, even not valid
Closed model
Tooling Design
Rapid Prototyping
Additional Design
Why do you need healing ? Some information on the Join operator How to choose a merging distance
2. Workbench presentation
Accessing the workbench The user interface Methodology for healing
p.27
p.28 p.31 p.32 p.33
3
Introduction to Healing Assistant
In this lesson, you will see some general information about :
The Need for Healing The Join Operator The Merging Distance
5. Closing a topology
Fixing free sides Local Join The healing operator Local Healing
p.4
p.5 p.6 p.9
p.11
p.12 p.13 p.14
p.15
p.16 p.17
p.20p.2Βιβλιοθήκη p.22p.23 p.24
• d < 0.001mm (system tolerance): edge is shared (geometrically closed)
1
2
• 0.001mm < d < merging distance: edge is shared (only topologically closed) • d > merging distance : edge is not shared, boundaries remain free sides
1
2
Surface 2 is included to the Join with a flag specifying that the orientation of the face is opposed to the orientation of the original surface (the surface itself is not changed)
4
Why Do You Need Healing ?
Foreign data: IGES, STEP, CATIA V4, other
Problems linked to imported data:
-accuracy uncontrolled
-validity criteria different from those of V5 -data quality downgraded during transfer -user mishandling (losses, duplications, …)
CATIA Training
Foils
Healing Assistant
Version 5 Release 9 June 2002 EDU-CAT-E-HA1-FF-V5R9
1
Course Presentation
Objectives of the course
In this course you will learn why, when and how to use the application HA1 Healing Assistant
STEP 1 is done considering a tolerance parameter called merging distance. All surface boundaries are compared to find those which are close enough to become shared edges.
Simulation
NC Manufacturing
5
Some Information on the Join Operator (1/3)
JOIN is the main operator for the creation of topology Joining surfaces is done in 2 steps
PROBLEM: it is not always possible to propagate a consistent orientation all over the Join.