Shanghai Jiao Tong University 1 Labs(part I): CAD ME 250: Design & Manufacturing I School of...

Shanghai Jiao Tong University 1

Labs(part I): CAD

ME 250: Design & Manufacturing I

School of Mechanical Engineering


Outline

Laboratories Objectives CAD system Software introduction User Interface


Laboratories Objectives

the use of CAD systems computer numerically controlled (CNC)

machines other aspects of manufacturing.


CAD system

Course objectives: Providing user with a solid Unigraphics

foundation. To create and edit design using appropriate

modeling techniques_Piece part modeling. To assembly parametric models_Product part

modeling. To creating engineering drawings_3D model

map to 2D drawing.


About Unigraphics

The leading software for Design-through-Manufacturing UG features UG modules


Technology Evolution

78: Drawing Based (Digital Drawings) 88: Feature Based (Digital Models)

Solid, Features, Visualization 95: Process Based (Digital Processes)

Process Integration: Auto, Aero, Machinery, Mold 99: Knowledge Based (UG V16) (Digital

Knowledge) Process Wizards, Optimization, Rules Based

Modeling


Technology Evolution

Today, Product Development Process Transfer: From Series Engineering to Enterprise_

Range Concurrent Collaboration (UG/in-KEY)

From Parametric Part Modeling to Parametric Product Modeling (UG/WAVE)

From 2D Drawing_based to 3D Solid model Centric (Master Model Approach)


UG/Software Key Features

A team_oriented, Enterprise level integrated MCAD/CAE/CAM product design system.


UG’ Software Characteristics

Integration Associatively Collaborative Advanced Flexibility


Integration CAD(D)/CAE/CAM Work Flow

Integration _ A full integrated M CAD/CAM/CAE Solution ， From Concept Design 、Detail Design 、 Engineering Analysis to Manufacturing；


Associatively

Master Model Approach

xxx_aaa.prt

xxx_aaa_dwg.prt

xxx_aaa_mfe.prtxxx_assm.prt

xxx_aaa_fea.prt

Associativity _ All applications are associative by Master Model approach；


Collaborative Concurrent Engineering

Concurrent Collaboration _Support concurrent

collaboration within the expand Enterprise scope through

using “Master Model”、 PDM (Teamcenter Engineering

/Teamcenter Enterprise) 、 PV 、 Internet technique；


Advanced

Supports “System Engineering” and “Virtual and Visual Product Development” By WAVE Techniques and Predictive

Engineering. Knowledge Based Engineering (KBE)_

By Knowledge Drive Automatism. UG NX solves “How to Capture 、 Reuse the special knowledge stored in those peoples and processes”.


Flexibility

Hybrid Modeling : Design intent determines modeling strategy.

Run on Multiple_hardware platform. (Unix, Windows)


Products with UG/Software


UG Modules

Modeling Shape Studio Drafting Manufacturing Assemblies Sheet Metal Routing Simulation


Modeling

UG software is primarily a solid modeling system. This module can help a design engineer quickly perform conceptual design.


Shape Studio

Lets you create a realistic image by shading it.

Unigraphics users often quick shade the part to be sure they are looking at it correctly.


Drafting

lets you create drawings, views, geometry, dimensions, and drafting annotations necessary for the completion of a drawing.


Manufacturing

allows you to interactively create NC machining programs, generate toolpaths, visualize material removal, and postprocess.


Assemblies

Product model A team-oriented design system Assemblies directly reference

component master models. Parametric Assemblies by using

Mating condition.


Simulation

perform finite element analysis on models, and create multiple "scenarios" to analyze the effects of various design modifications on the finite element model.

give you a basic understanding of the Scenario for Structures concept and functionality.


User Interface

Main Menu Bar Standard Icon View Icon Dialog Cue line Status Line


User Interface


Modeling Work Procedure

Main Menu Bar(File Edit View Insert Format Tools Assemblies Information Analysis Preferences Window Help)

Creat/Analysis/Edit File/View Preferences/ Format Tools Insert Information/Analysis Edit


Customizing Toolbars Tools-Customize


Main Menu_File Manage UG part files

New Open Close Save Print


Main Menu_File The name of the part is displayed in the title

bar of the graphics area.

If you are working with assemblies, you can display a part of an assemble file.

If you are working with assemblies, you can work on a part file of a assemble file for creating and editing operations.


File_save or close

When the word "Modified" (in parentheses) appears in the title bar of the graphics window, you know that you have made changes to the part that have not yet been saved.

After a part is saved, the Status line will say "Part file saved", and the word "Modified" will be removed from the graphics area window title bar.


Main Menu_preferences


Tools_Expression When an object is created in

Unigraphics, expressions (i.e., equations) are created by the system, describing information about the object's size, location, and other information.

You can also create expressions yourself, and then use the names of the expressions in place of actual values as you create geometry. Later, you can change the values of the expressions and the part will automatically update.


Insert

Modeling Drafting


Coordinate System A coordinate system determines location

and orientation in modeling space. All coordinate systems in Unigraphics are

right-hand rule coordinate systems.


Coordinate System

The Absolute Coordinate System (ACS) is the coordinate system from which all objects are referenced.(fixed)

“Existing coordinate system" (CSYS) can be used to return to a specific location and orientation in modeling space.

The Work Coordinate System (WCS) is the one you will use for construction when you want to determine orientations and angles of features as you build your solid.


Work Coordinate System The axes of the WCS are

denoted XC, YC, and ZC. WCS-Origin…Defines a new

WCS by redefining the origin of the current WCS.


Work Coordinate System

WCS-Rotates…Describes the new WCS as a rotation of the current WCS about one of its axes.


Work Coordinate System

WCS Display Toggles the display of the WCS ON and OFF.

WCS Save Creates a coordinate system at the current WCS origin and orientation.


CSYS Constructor

The CSYS Constructor dialog gives you many different orientation methods. It appears when you choose WCS Orient or View Orient.


Layer control

Layers help you organize and manage data within a file. Every object in the database is located on one of 256 individual layers.

Layers act as a filter to specify which objects are selectable, visible, or invisible. They can show different geometry in different views.

Format/Layer Settings


Layer Settings


Selecting Features

In Unigraphics, the word "feature" means associative object.

Features include such things as blocks, holes, slots, pockets, blends, chamfers, and so on.


Selecting Features

If you select the prehighlighted object after the cursor tip is displayed, the QuickPick confirmation dialog is provided.


Selection

You can select Body, Face, Curve , Silhouettes（轮廓线） , Edges（边缘） , Vertex（顶点） , etc.

The ways of Selection: Single Selection, Multiple Selection, Rectangle/Polygon Selection, Chaining Selection（链接选取） , Class Selection（种类选择） .


Class Selection


The Standard Views

There are eight standard views available in every part

Top Bottom Front Back Right Left TFR-ISO (Top/Front/Right

Isometric) TFR-TRI (Top/Front/Right

Trimetric)


The Standard Views

The options on the View pull-down menu let you manipulate views in various ways. But the Right_button pop-up menu has many of these same options and is often more convenient to use.


Layout layouts are available. View/ Layout


Review

UG’ Software Characteristics UG’ Software User Interface

Shanghai Jiao Tong University 1 Labs(part I): CAD ME 250: Design & Manufacturing I School of...

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